File Info : application/pdf, 52 Pages, 2.91MB

MQP56-rev-1-op-manual

OPERATION MANUAL
MODEL MQP56
60HZ GENERATOR
(ISUZU 4JJ1X DIESEL ENGINE)
Revision #1 (01/24/18)
To find the latest revision of this publication, visit our website at:
www.mqpower.com THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.

PROPOSITION 65 WARNING
Diesel engine exhaust and some of
PAGE 2 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

REPORTING SAFETY DEFECTS
If you believe that your vehicle has a defect that could cause a crash or could cause injury or death, you should immediately inform the National Highway Traffic Safety Administration (NHTSA) in addition to notifying Multiquip at 1-800-421-1244. If NHTSA receives similar complaints, it may open an investigation, and if it finds that a safety defect exists in a group of vehicles, it may order a recall and remedy campaign. However, NHTSA cannot become involved in individual problems between you, your dealer, or Multiquip. To contact NHTSA, you may either call the Vehicle Safety Hotline toll-free at 1-888-327-4236 (TTY: 1-800-424-9153), go to http://www.nhtsa.dot.gov; or write to:
Administrator NHTSA 1200 New Jersey Avenue S.E. Washington, DC 20590 You can also obtain information about motor vehicle safety from http://www.safecar.gov.
MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 3

MQP56 60Hz Generator
Proposition 65 Warning............................................ 2 Reporting Safety Defects.......................................... 3 Table Of Contents..................................................... 4 Safety Information............................................... 5-10 Specifications......................................................... 11 Dimensions............................................................. 12 Installation......................................................... 14-15 General Information................................................ 16 Major Components................................................. 17 Generator Control Panel......................................... 18 Engine Operating Panel.................................... 20-21 Output Terminal Panel Familiarization............... 22-24 Load Application..................................................... 25 Generator Outputs.................................................. 26 Generator Outputs/Gauge Reading........................ 27 Output Terminal Panel Connections.................. 28-29 Inspection/Setup................................................ 30-33 Generator Start-Up Procedure ......................... 34-35 Generator Shut-Down Procedures......................... 36 Maintenance...................................................... 38-45 Generator Wiring Diagram...................................... 46 Engine Wiring Diagram........................................... 47 Troubleshooting (Generator)................................... 48 Troubleshooting (Diagnostic Lamp)........................ 49 Battery Charger Wiring Diagram............................ 50 Jacket Water Heater Wiring Diagram...................... 51
NOTICE
Specifications are subject to change without notice.

TABLE OF CONTENTS

PAGE 4 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

DO NOT operate or service the generator before reading the entire manual. Safety precautions should be followed at all times when operating this generator. Failure to read and understand the safety messages and operating instructions could result in injury to yourself and others.
SAFETY MESSAGES
The four safety messages shown below will inform you about potential hazards that could injure you or others. The safety messages specifically address the level of exposure to the operator and are preceded by one of four words: DANGER, WARNING, CAUTION or NOTICE.
SAFETY SYMBOLS

SAFETY INFORMATION
Potential hazards associated with the operation of this generator will be referenced with hazard symbols which may appear throughout this manual in conjunction with safety messages.

DANGER
Indicates a hazardous situation which, if not avoided, WILL result in DEATH or SERIOUS INJURY.

WARNING
Indicates a hazardous situation which, if not avoided, COULD result in DEATH or SERIOUS INJURY.

CAUTION
Indicates a hazardous situation which, if not avoided, COULD result in MINOR or MODERATE INJURY.

NOTICE Addresses practices not related to personal injury.

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 5

GENERAL SAFETY CAUTION
NEVER operate this generator without proper protective clothing, shatterproof glasses, respiratory protection, hearing protection, steel-toed boots and other protective devices required by the job or city and state regulations.
NEVER operate this generator when not feeling well due to fatigue, illness or when under medication.
NEVER operate this generator under the influence of drugs or alcohol.
ALWAYS check the generator for loosened threads or bolts before starting.
DO NOT use the generator for any purpose other than its intended purposes or applications. NOTICE
This generator should only be operated by trained and qualified personnel 18 years of age and older.
Whenever necessary, replace nameplate, operation and safety decals when they become difficult read.
Manufacturer does not assume responsibility for any accident due to generator modifications. Unauthorized generator modification will void all warranties.

SAFETY INFORMATION
NEVER use accessories or attachments that are not recommended by MQ Power for this generator. Damage to the generator and/or injury to user may result.
ALWAYS know the location of the nearest fire extinguisher.
ALWAYS know the location of the nearest first aid kit.
ALWAYS know the location of the nearest phone or keep a phone on the job site. Also, know the phone numbers of the nearest ambulance, doctor and fire department. This information will be invaluable in the case of an emergency.
GENERATOR SAFETY
DANGER
NEVER operate the generator in an explosive atmosphere or near combustible materials. An explosion or fire could result causing severe bodily harm or even death.
WARNING
NEVER disconnect any emergency or safety devices. These devices are intended for operator safety. Disconnection of these devices can cause severe injury, bodily harm or even death. Disconnection of any of these devices will void all warranties.
CAUTION
NEVER lubricate components or attempt service on a running machine.
NOTICE
ALWAYS ensure generator is on level ground before use.
ALWAYS keep the generator in proper running condition.
Fix damage to generator and replace any broken parts immediately.
ALWAYS store generator properly when it is not being used. Generator should be stored in a clean, dry location out of the reach of children and unauthorized personnel.

PAGE 6 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

ENGINE SAFETY
DANGER
The engine fuel exhaust gases contain poisonous carbon monoxide. This gas is colorless and odorless, and can cause death if inhaled.
The engine in this generator requires an adequate free flow of cooling air. NEVER operate this generator in any enclosed or narrow area where free flow of the air is restricted. If the air flow is restricted it will cause injury to people and property and serious damage to the generator or engine.
WARNING
DO NOT place hands or fingers inside engine compartment when engine is running.
NEVER operate the engine with heat shields or guards removed.
Keep fingers, hands hair and clothing away from all moving parts to prevent injury.
DO NOT remove the radiator cap while the engine is hot. High pressure boiling water will gush out of the radiator and severely scald any persons in the general area of the generator.
DO NOT remove the coolant drain plug while the engine is hot. Hot coolant will gush out of the coolant tank and severely scald any persons in the general area of the generator.
DO NOT remove the engine oil drain plug while the engine is hot. Hot oil will gush out of the oil tank and severely scald any persons in the general area of the generator.
CAUTION
NEVER touch the hot exhaust manifold, muffler or cylinder. Allow these parts to cool before servicing generator.

SAFETY INFORMATION
NOTICE
NEVER run engine without an air filter or with a dirty air filter. Severe engine damage may occur. Service air filter frequently to prevent engine malfunction.
NEVER tamper with the factory settings of the engine or engine governor. Damage to the engine or generator can result if operating in speed ranges above the maximum allowable.
Wet stacking is a common problem with diesel engines which are operated for extended periods with light or no load applied. When a diesel engine operates without sufficient load (less than 40% of the rated output), it will not operate at its optimum temperature. This will allow unburned fuel to accumulate in the exhaust system, which can foul the fuel injectors, engine valves and exhaust system, including turbochargers, and reduce the operating performance.
In order for a diesel engine to operate at peak efficiency, it must be able to provide fuel and air in the proper ratio and at a high enough engine temperature for the engine to completely burn all of the fuel.
Wet stacking does not usually cause any permanent damage and can be alleviated if additional load is applied to relieve the condition. It can reduce the system performance and increase maintenance. Applying an increasing load over a period of time until the excess fuel is burned off and the system capacity is reached usually can repair the condition. This can take several hours to burn off the accumulated unburned fuel.
State Health Safety Codes and Public Resources Codes specify that in certain locations, spark arresters must be used on internal combustion engines that use hydrocarbon fuels. A spark arrester is a device designed to prevent accidental discharge of sparks or flames from the engine exhaust. Spark arresters are qualified and rated by the United States Forest Service for this purpose. In order to comply with local laws regarding spark arresters, consult the engine distributor or the local Health and Safety Administrator.

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 7

FUEL SAFETY
DANGER
DO NOT start the engine near spilled fuel or combustible fluids. Diesel fuel is extremely flammable and its vapors can cause an explosion if ignited.
ALWAYS refuel in a well-ventilated area, away from sparks and open flames.
ALWAYS use extreme caution when working with flammable liquids.
DO NOT fill the fuel tank while the engine is running or hot.
DO NOT overfill tank, since spilled fuel could ignite if it comes into contact with hot engine parts or sparks from the ignition system.
Store fuel in appropriate containers, in well-ventilated areas and away from sparks and flames.
NEVER use fuel as a cleaning agent.
DO NOT smoke around or near the generator. Fire or explosion could result from fuel vapors or if fuel is spilled on a hot engine.
ELECTRICAL SAFETY
DANGER
DO NOT touch output terminals during operation. Contact with output terminals during operation can cause electrocution, electrical shock or burn.
The electrical voltage required to operate the generator can cause severe injury or even death through physical contact with live circuits. Turn generator and all circuit breakers OFF before performing maintenance on the generator or making contact with output terminals.
NEVER insert any objects into the output receptacles during operation. This is extremely dangerous. The possibility exists of electrical shock, electrocution or death.

SAFETY INFORMATION
Backfeed to a utility system can cause electrocution and/or property damage. NEVER connect the generator to a building's electrical system without a transfer switch or other approved device. All installations should be performed by a licensed electrician in accordance with all applicable laws and electrical codes. Failure to do so could result in electrical shock or burn, causing serious injury or even death.
Power Cord/Cable Safety
DANGER
NEVER let power cords or cables lay in water.
NEVER stand in water while AC power from the generator is being transferred to a load.
NEVER use damaged or worn cables or cords when connecting generator to generator. Inspect for cuts in the insulation.
NEVER grab or touch a live power cord or cable with wet hands. The possibility exists of electrical shock, electrocution or death.
Make sure power cables are securely connected to the generator's output receptacles. Incorrect connections may cause electrical shock and damage to the generator.
NOTICE
ALWAYS make certain that proper power or extension cord has been selected for the job. See Cable Selection Chart in this manual.

PAGE 8 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

Grounding Safety
DANGER
This generator is equipped with a grounding terminal attached to the enclosure. Electrical grounding requirements can differ by State, Province, District, Municipality, and unique application settings.
For portable and vehicle-mounted generators, Multiquip recognizes the guidance provided in NEC Handbook Article 250.34 Parts A and B, and 29 CFR 1926.404 (f) (3) (i). If a more definitive earth-to-ground safeguard is required, please consult a qualified electrician and reference appropriate National Electrical Code (NEC) guidelines in establishing an exterior grounding point generator.
NEVER use gas piping as an electrical ground.
NOTICE
There is a permanent conductor bond between generator (stator winding) and the frame.
BATTERY SAFETY
DANGER
DO NOT drop the battery. There is a possibility that the battery will explode.
DO NOT expose the battery to open flames, sparks, cigarettes, etc.The battery contains combustible gases and liquids. If these gases and liquids come into contact with a flame or spark, an explosion could occur.

SAFETY INFORMATION
WARNING
ALWAYS wear safety glasses when handling the battery to avoid eye irritation. The battery contains acids that can cause injury to the eyes and skin.
Use well-insulated gloves when picking up the battery.
ALWAYS keep the battery charged. If the battery is not charged, combustible gas will build up.
ALWAYS recharge the battery in a well-ventilated environment to avoid the risk of a dangerous concentration of combustible gasses.
If the battery liquid (dilute sulfuric acid) comes into contact with clothing or skin, rinse skin or clothing immediately with plenty of water.
If the battery liquid (dilute sulfuric acid) comes into contact with eyes, rinse eyes immediately with plenty of water and contact the nearest doctor or hospital to seek medical attention.
CAUTION
ALWAYS disconnect the NEGATIVE battery terminal before performing service on the generator.
ALWAYS keep battery cables in good working condition. Repair or replace all worn cables.

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 9

ENVIRONMENTAL SAFETY/DECOMMISSIONING
NOTICE
Decommissioning is a controlled process used to safely retire a piece of generator that is no longer serviceable. If the generator poses an unacceptable and unrepairable safety risk due to wear or damage or is no longer cost effective to maintain (beyond life-cycle reliability) and is to be decommissioned (demolition and dismantlement),be sure to follow rules below.
DO NOT pour waste or oil directly onto the ground, down a drain or into any water source.
Contact your country's Department of Public Works or recycling agency in your area and arrange for proper disposal of any electrical components, waste or oil associated with this generator.
When the life cycle of this generator is over, remove battery(s) and bring to an appropriate facility for lead reclamation. Use safety precautions when handling batteries that contain sulfuric acid.
When the life cycle of this generator is over, it is recommended that the generator frame and all other metal parts be sent to a recycling center.
Metal recycling involves the collection of metal from discarded products and its transformation into raw materials to use in manufacturing a new product.
Recyclers and manufacturers alike promote the process of recycling metal. Using a metal recycling center promotes energy cost savings.

SAFETY INFORMATION
EMISSIONS INFORMATION
NOTICE
The diesel engine used in this generator has been designed to reduce harmful levels of carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOx) contained in diesel exhaust emissions.
This engine has been certified to meet US EPA Evaporative emissions requirements in the installed configuration.
Attempting to modify or make adjustments to the engine emission system by unauthorized personnel without proper training could damage the generator or create an unsafe condition.
Additionally, modifying the fuel system may adversely affect evaporative emissions, resulting in fines or other penalties.
Emission Control Label
The emission control label is an integral part of the emission system and is strictly controlled by regulations.
The label must remain with the engine for its entire life.
If a replacement emission label is needed, please contact your authorized engine distributor.

PAGE 10 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

SPECIFICATIONS

Table 1. Generator Specifications

Model

MQP56

Type

Revolving field, self ventilated, open protected type synchronous generator

Armature Connection

Star with Neutral

Zigzag

Phase

Single

Standby Output

77 kVA (62 kW)

44 KW

Prime Output

70 kVA (56 KW)

40 KW

3Ø Voltage (L-L/L-N) Voltage Selector Switch at 3Ø 240/139

208Y/120, 220Y/127, 240Y/139

N/A

3Ø Voltage (L-L/L-N) Voltage Selector Switch at 3Ø 480/277

416Y/240, 440Y/254, 480Y/277

N/A

1Ø Voltage (L-L/L-N) Voltage Selector Switch at 1Ø 240/120

N/A

240/120

Power Factor

0.8

1.0

Frequency

60 Hz

Speed

1800 rpm

Aux. AC Power

Single Phase, 60 Hz

Aux. Voltage/Output

4.8 Kw (2.4 kW x 2)

Dry Weight

2,701 lbs. (1,225 kg.)

Wet Weight

3,035 lbs. (1,376 kg.)

Table 2. Engine Specifications

Model

ISUZU 4JJ1X Tier 3

Type

4 cycle, water-cooled, direct injection, turbo-charged

No. of Cylinders

4 cylinders

Bore x Stroke

3.76 in. x 4.13 in. (95.4 mm x 105 mm)

Displacement

183 in3 ( 3.00 liters)

Rated Output

85 HP at 1800 rpm

Starting

Electric

Coolant Capacity

3.09 gal. (11.7 liters)

Lube Oil Capacity

3.96 gal. (15.0 liters)

Engine Oil Type

API service class CJ-4 or JASO DH-2

Fuel Type

Ultra Low Sulfer No. 2 Diesel Fuel

Fuel Tank Capacity

40 gal. (150 liters)

Fuel Consumption

4.1 gal. (15.4 L)/hr at full load 3.1 gal. (11.9 L)/hr at 3/4 load 2.2 gal. (8.4 L)/hr at 1/2 load 1.4 gal. (5.2 L)/hr at 1/4 load

Battery

12V 72Ah x 1

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 11

B
A TOP VIEW
D

DIMENSIONS
C
E

SIDE VIEW

FRONT VIEW G
H

Figure 1. Dimensions

Reference Letter A B C D
E

Table 3. Dimensions

Dimension in. (mm) Reference Letter

30.3 (770)

30.5 (775)

35.8 (910)

30.5 (770)

35.8 (910)

Dimension in. (mm)
94.5 (2400) 55.1 (1400) 35.43 (900)

PAGE 12 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

NOTES
MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 13

CONNECTING THE GROUND
Consult with local Electrical and Safety Codes for proper connection based on condition of use.
EXAMPLE of how to ground the unit if the condition of use requires such a device:
The ground terminal on the generator should always be used to connect the generator to a suitable ground when required.

INSTALLATION
The ground cable should be #8 size wire (aluminum) minimum. If copper wire is used, #10 size wire minimum should be used.
Connect one end of the ground cable terminal to the generator ground point (Figure 2). Connect the other end of the ground cable to a suitable earth ground (ground rod).

GENERATOR GROUND LUG

GROUND CABLE

REFERENCE NEC 250

IF THE GENERATOR IS PROVIDING ELECTRIC POWER TO A BUILDING VIA A TRANSFER SWITCH IT MUST BE CONNECTED TO A GROUND ROD.
8 FT./2.4 M (MINIMUM)

Figure 2. Typical Generator Grounding Application

PAGE 14 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

OUTDOOR INSTALLATION
Install the generator in a area that is free of debris, bystanders, and overhead obstructions. Make sure the generator is on secure level ground so that it cannot slide or shift around. Also install the generator in a manner so that the exhaust will not be discharged in the direction of nearby homes.
The installation site must be relatively free from moisture and dust. All electrical equipment should be protected from excessive moisture. Failure to do will result in deterioration of the insulation and will result in short circuits and grounding.
Foreign materials such as dust, sand, lint and abrasive materials have a tendency to cause excessive wear to engine and alternator parts.
CAUTION
Pay close attention to ventilation when operating the generator inside tunnels and caves. The engine exhaust contains noxious elements. Engine exhaust must be routed to a ventilated area.
INDOOR INSTALLATION
Exhaust gases from diesel engines are extremely poisonous. Whenever an engine is installed indoors the exhaust fumes must be vented to the outside. The engine should be installed at least two feet from any outside wall. Using an exhaust pipe which is too long or too small can cause excessive back pressure which will cause the engine to heat excessively and possibly burn the valves.
MOUNTING
The generator must be mounted on a solid foundation (such as concrete) and set firmly on the foundation to isolate vibration of the generator when it is running. The generator must set at least 6 inches above the floor or grade level (in accordance to NFPA 110, Chapter 54.1). DO NOT remove the metal skids on the bottom of the generator. They are to resist damage to the bottom of the generator and to maintain alignment.

INSTALLATION
GENERATOR GROUNDING
NOTICE
The Occupational Safety and Health Administration (OSHA) and the National Electrical Code (NEC) recommend that if the generator is providing electrical power to a structure (home, office shop, trailer or similar) it must be connected to a grounding electrode system, such a driven ground rod (Figure 2).
If applicable, to guard against electrical shock and possible damage to the equipment, it is important to provide a good EARTH ground, (Figure 2).
NOTICE
ALWAYS check with State, Province, District and Municipalities for electrical grounding requirements before using generator.
Article 250 (Grounding) of the NEC handbook provides guidelines for proper grounding and specifies that the cable ground shall be connected to the grounding system of the building as close to the point of cable entry as practical.
NEC article 250 specifices the following grounding requirements:
1. Use one of the following wire types to connect the generator to earth ground.
a. Copper 10 AWG (5.3 mm2) or larger.
b. Aluminum 8 AWG (8.4 mm2) or larger.
2. When grounding of the generator (Figure 2) is required, connect one end the ground cable to the ground lug on the generator. Connect the other end of the ground cable to the ground rod (earth ground).
3. NEC article 250 specifies that the earth ground rod should be buried a minimum of 8 ft. into the ground.
NOTICE
When connecting the generator to any buildings electrical system ALWAYS consult with a licensed electrician.

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 15

GENERATOR The MQ Power Model MQP56 generator (Figure 3) is a high quality portable (requires a trailer for transport) power source for telecom sites, lighting facilities, power tools, submersible pumps and other industrial and construction machinery. ENGINE OPERATING PANEL The "Engine Operating Panel" is provided with the following: Tachometer Water Temperature Gauge Warning Lamp Pre-Heat Lamp Oil Pressure Gauge Charging Ammeter Gauge Fuel Level Gauge Panel Light/Panel Light Switch ECU Controller Engine Speed Switch
GENERATOR CONTROL PANEL The "Generator Control Panel" is provided with the following: Frequency Meter (Hz) AC Ammeter (Amps) AC Voltmeter (Volts) Ammeter Change-Over Switch Voltmeter Change-Over Switch Voltage Regulator 3-Pole, 175 amp Main Circuit Breaker "Control Box" (Located Behind the Gen. Control Panel)
· Automatic Voltage Regulator · Current Transformer · Over-Current Relay · Starter Relay · Voltage Selector Switch
OUTPUT TERMINAL PANEL The "Output Terminal Panel" is provided with the following: Three 240/120V output receptacles (CS-6369), 50A Three auxiliary circuit breakers, 50A Two 120V output duplex receptacles (GFCI), 20A Two duplex circuit breakers, 20A Five output terminal lugs (3Ø power)

GENERAL INFORMATION
OPEN DELTA EXCITATION SYSTEM
This generator is equipped with the state of the art "OpenDelta" excitation system. The open delta system consist of an electrically independent winding wound among stationary windings of the AC output section.
There are four connections of the open delta A, B, C and D. During steady state loads, the power from the voltage regulator is supplied from the parallel connections of A to B, A to D, and C to D. These three phases of the voltage input to the voltage regulator are then rectified and are the excitation current for the exciter section.
When a heavy load, such as a motor starting or a short circuit occurs, the automatic voltage regulator (AVR) switches the configuration of the open delta to the series connection of B to C. This has the effect of adding the voltages of each phase to provide higher excitation to the exciter section and thus better voltage response during the application of heavy loads. The connections of the AVR to the AC output windings are for sensing only. No power is required from these windings. The open-delta design provides virtually unlimited excitation current, offering maximum motor starting capabilities. The excitation does not have a "fixed ceiling" and responds according the demands of the required load.
ENGINE This generator unit incorporates an ISUZU 4JJ1X diesel engine.This engine is designed to meet every performance requirement for the generator. Reference Table 2 for engine specifications.
In keeping with MQ Power's policy of constantly improving its products, the specifications quoted herein are subject to change without prior notice.
ELECTRIC GOVERNOR SYSTEM
The electric governor system controls the RPMs of the engine. When the engine demand increases or decreases, the governor system regulates the frequency variation to ±.25%.
EXTENSION CABLES
When electric power is to be provided to various tools or loads at some distance from the generator, extension cords are normally used. Cables should be sized to allow for distance in length and amperage so that the voltage drop between the generator and point of use (load) is held to a minimum. Use the cable selection chart (Table 6) as a guide for selecting proper extension cable size.

PAGE 16 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

MAJOR COMPONENTS
1

4 6
5

7 9

AUTO

MANUAL

OFF/RESET

LOW OIL PRESSURE HIGH COOLANT TEMPERATURE OVERCRANK OVERSPEED ENGINE RUNNING

MOOOOO-20001Q

1000

2000

3000

RPM

Table 4. Generator Major Components

ITEM NO.

DESCRIPTION

Voltage Selector Switch Assembly

Output Terminal Panel Assembly

Air Cleaner Assembly

Muffler Assembly

Fuel Tank Assembly

Generator Assembly

Battery Assembly

Generator Control Panel Assembly

Engine Operating Panel Assembly

Figure 3. Major Components MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 17

GENERATOR CONTROL PANEL

AUTO

MANUAL

OFF/RESET

LOW OIL PRESSURE HIGH COOLANT TEMPERATURE OVERCRANK OVERSPEED ENGINE RUNNING

MOOOOO-20001Q

1000

2000

3000

RPM

7 6 5

INCREASE

1
DECREASE

3 U

OFF

V-W

U-V

W-U

OFF

Figure 4. Generator Control Panel

The definitions below describe the controls and functions of the Generator Control Panel (Figure 4).
1. Voltage Regulator Control -- Allows ±15% manual adjustment of the generator's output voltage.
2. Main Circuit Breaker -- This three-pole, 175A main breaker is provided to protect the the U,V, and W Output Terminal Lugs from overload.
3. Ammeter Change-Over Switch -- This switch allows the AC ammeter to indicate the current flowing to the load connected to any phase of the output terminals, or to be switched off. This switch does not effect the generator output in any fashion, it is for current reading only.
4. Voltmeter Change-Over Switch -- This switch allows the AC voltmeter to indicate phase to phase voltage between any two phases of the output terminals or to be switched off.
5. AC Voltmeter -- Indicates the output voltage present at the U,V, and W Output Terminal Lugs.
6. AC Ammeter -- Indicates the amount of current the load is drawing from the generator per leg selected by the ammeter phase-selector switch.
7. Frequency Meter -- Indicates the output frequency in hertz (Hz). Normally 60 Hz.

Located behind the generator control panel is the Generator Control Box. This box contains some of the necessary electronic components required to make the generator function.
The Control Box is equipped with the following major components:
Over-Current Relay
Automatic Voltage Regulator (AVR)
Starter Relay
Current Transformer
Voltage Selector Switch
Main Circuit Breaker
NOTICE
Remember the overcurrent relay monitors the current flowing from the U,V, and W Output Terminal Lugs to the load.
In the event of a short circuit or over current condition, it will automatically trip the 175 amp main breaker.
To restore power to the Output Terminal Panel, press the reset button on the overcurrent relay and place the main circuit breaker in the closed position (ON).

PAGE 18 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

NOTES
MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 19

3 2

9 4

AUTO

MANUAL

OFF/RESET

LOW OIL PRESSURE

HIGH COOLANT TEMPERATURE

OVERCRANK

OVERSPEED

ENGINE RUNNING

MOOOOO-20001Q

1000

2000

3000

RPM

ENGINE OPERATING PANEL

INCREASE

DECREASE

OFF

V-W

U-V

W-U

OFF

Figure 5. Engine Operating Panel

PAGE 20 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

The definitions below describe the controls and functions of the Engine Operating Panel (Figure 5).
1. Panel Light -- Normally used in dark areas or at night time. When activated, panel lights will illuminate. When the generator is not in use be sure to turn the panel light switch to the OFF position.
2. Panel Light Switch -- When activated will turn on control panel light.
3. Oil Pressure Gauge -- During normal operation this gauge should read between 42 ~71 psi. (290~490 kPa). When starting the generator the oil pressure may read a little higher, but after the engine warms up the oil pressure should return to the correct pressure range.
4. Water Temperature Gauge -- During normal operation this gauge be should read between 167°~203°F (75° ~95°C).
5. Charging Ammeter Gauge -- Indicates the current being supplied by the engine's alternator which provides current for generator's control circuits and battery charging system.
6. Fuel Gauge -- Indicates amount of diesel fuel available.
7. Tachometer -- Indicates engine speed in RPM's for 60 Hz operation. This meter should indicate 1800 RPM's when the rated load is applied. In addition a built in hour meter will record the number of operational hours that the generator has been in use.
8. Preheat Lamp -- As the engine cranks, this lamp will illuminate to indicate automatic preheating of the engine glow plugs. When the lamp turns off, this indicates that the preheat cycle is complete and the engine will start automatically.
9. Warning Lamp -- This lamp will illuminate when a critical engine fault has occured.
10. Engine Speed Switch -- This switch controls the speed of the engine (low/high).
11. Auto START/STOP Engine Controller (ECU) -- This controller has a vertical row of status LED's (inset), that when lit, indicate that an engine malfunction (fault) has been detected. When a fault has been detected the engine controller will evaluate the fault and all major faults will shutdown the generator. During cranking cycle, the ECU will attempt to crank the engine for 10 seconds before disengaging.

ENGINE OPERATING PANEL
If the engine does not engage (start) by the third attempt, the engine will be shutdown by the engine controller's Over Crank Protection mode. If the engine engages at a speed (RPM's) that is not safe, the controller will shutdown the engine by initializing the Over Speed Protection mode.
Also the engine controller will shutdown the engine in the event of low oil pressure, high coolant temperature, low coolant level, and loss of magnetic pickup. These conditions can be observed by monitoring the LED status indicators on the front of the controller module.
A. ECU Control Switch -- This switch controls the running of the unit. If this switch is set to the OFF/ RESET position, the unit will not run. When this switch is set to the manual position, the generator will start immediately.
If the generator is to be connected to a building's AC power source via an automatic transfer switch (isolation), place the switch in the AUTO position. In this position, should an outage occur, the automatic transfer switch (ATS) will start the generator automatically via the generator's auto-start contacts connected to the ATS's start contacts. Please refer to your ATS installation manual for further instructions for the correct installation of the auto-start contacts of the generator to the ATS.
B. Low Oil Pressure -- Indicates the engine pressure has fallen below 15 psi (103 kPa). The oil pressure is detected using variable resistive values from the oil pressure sending unit. This is considered a major fault.
C. High Coolant Temperature -- Indicates the engine temperature has exceeded 230°F (110°C). The engine temperature is detected using variable resistive values from the temperature sending unit. This is considered a major fault.
D. Overcrank Shutdown -- Indicates the unit has attempted to start a pre- programmed number of times, and has failed to start. The number of cycles and duration are programmable. It is pre-set at 3 cycles with a 10 second duration. This is considered a major fault.
E. Overspeed Shutdown -- Indicates the engine is running at an unsafe speed. This is considered a major fault.
F. Engine Running -- Indicates that engine is running at a safe operating speed.

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 21

OUTPUT TERMINAL PANEL FAMILIARIZATION

OUTPUT TERMINAL PANEL

OUTPUT TERMINAL FAMILIARIZATION

The Output Terminal Panel (Figure 6) shown below is located on the right-hand side (left from control panel) of the generator. Lift up on the cover to gain access to receptacles and terminal lugs.
NOTICE
Terminal legs "O" and "Ground" are considered bonded grounds.

The "Output Terminal Panel " (Figure 6) is provided with the following: Three 240/120V output receptacles @ 50 amp Three Circuit Breakers @ 50 amps Two 120V GFCI receptacles @ 20 amp Two Duplex Circuit Breakers @ 20 amps Five Output Terminal Lugs ( U, V, W, O, Ground)

1Ø AND 3Ø, 480 -120 VAC OUTPUT TERMINALS

NEUTRAL TERMINAL

GROUND TERMINAL

U VW O

HARD WIRE HOOKUP PANEL

BLACK RED BLUE WHITE GREEN

CIRCUIT BREAKERS FOR GFCI RECEPTACLES
120 VAC, 20 AMP GFCI RECEPTACLES

CIRCUIT BREAKERS FOR CS-6369 TWIST LOCK RECEPTACLES

RECEPTACLE AND
CIRCUIT BREAKER PANEL

AUX. POWER RECEPTACLES 240/120V, 50 AMPS

CS-6369 TWIST-LOCK

Figure 6. Output Terminal Panel

ACCESS DOOR LIFT TO OPEN

PAGE 22 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

OUTPUT TERMINAL PANEL FAMILIARIZATION

120 VAC GFCI Receptacles There are two 120 VAC, 20 amp GFCI (Duplex Nema 5-20R) receptacles provided on the output terminal panel. These receptacles can be accessed in any voltage selector switch position. Each receptacle is protected by a 20 amp circuit breaker. These breakers are located directly above the GFCI receptacles. Remember the load output (current) of both GFCI receptacles is dependent on the load requirements of the U, V, and W output terminal lugs. Pressing the reset button resets the GFCI receptacle after being tripped. Pressing the test button (See Figure 7) in the center of the receptacle will check the GFCI function. Both receptacles should be tested at least once a month.
Figure 7. G.F.C.I. Receptacle
Twist Lock Dual Voltage 120/240 VAC Receptacles There are three 240/120V, 50 amp auxiliary twistlock (CS-6369) receptacles (Figure 8) provided on the output terminal panel. These receptacles can only be accessed when the voltage selector switch is placed in the single-phase 240/120 position.
CS-6369 TWIST-LOCK RECEPTACLES

Each auxiliary receptacle is protected by a 50 amp circuit breaker. These breakers are located directly above the GFCI receptacles. Remember the load output (current) on all three receptacles is dependent on the load requirements of the Output Terminal Lugs. Turn the voltage regulator control knob (Figure 9) on the control panel to obtain the desired voltage.Turning the knob clockwise will increase the voltage, turning the knob counter-clockwise will decrease the voltage.
Figure 9. Voltage Regulator Control Knob
Removing the Plastic Face Plate (Hard Wire Hookup Panel)
The Output Terminal Lugs are protected by a plastic face plate cover (Figure 10). Un-screw the securing bolts and lift the plastic terminal cover to gain access to the terminal enclosure. After the load wires have been securely attached to the terminal lugs, reinstall the plastic face plate.

Figure 10. Plastic Face Plate (Output Terminal Lugs)

SINGLE-PHASE 240/120 VAC
50 AMP OUTPUT
Figure 8. 240/120V Twist-Lock Auxiliary Receptacles

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 23

OUTPUT TERMINAL PANEL FAMILIARIZATION

Connecting Loads
Loads can be connected to the generator by the Output Terminal Lugs or the convenience receptacles (Figure 11). Make sure to read the operation manual before attempting to connect a load to the generator.
To protect the output terminals from overload, a 3-pole, 175A main circuit breaker is provided. Make sure to switch ALL circuit breakers to the OFF position prior to starting the engine.

Over Current Relay
An over current relay (Figure 12) is connected to the main circuit breaker. In the event of an overload, both the circuit breaker and the over current relay may trip. If the circuit breaker can not be reset, the reset button on the over current relay must be pressed. The over current relay is located in the control box.

Figure 11. Connecting Loads

Figure 12. Over Current Relay

PAGE 24 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

SINGLE PHASE LOAD
Always be sure to check the nameplate on the generator and equipment to insure the wattage, amperage, frequency, and voltage requirements are satisfactorily supplied by the generator for operating the equipment.
Generally, the wattage listed on the nameplate of the equipment is its rated output. Equipment may require 130--150% more wattage than the rating on the nameplate, as the wattage is influenced by the efficiency, power factor and starting system of the equipment.
NOTICE
If wattage is not given on the equipment's name plate, approximate wattage may be determined by multiplying nameplate voltage by the nameplate amperage.

WATTS = VOLTAGE x AMPERAGE

The power factor of this generator is 0.8. See Table 5 below when connecting loads.

Table 5. Power Factor By Load

Type of Load

Power Factor

Single-phase induction motors

0.4-0.75

Electric heaters, incandescent lamps Fluorescent lamps, mercury lamps Electronic devices, communication equipment Common power tools

1.0 0.4-0.9
1.0 0.8

Table 6. Cable Selection (60 Hz, Single Phase Operation)

Current in
Amperes

Load in Watts At 100 At 200 Volts Volts

Maximum Allowable Cable Length #10 Wire #12 Wire #14 Wire #16 Wire

2.5

300

600 1000 ft. 600 ft. 375 ft. 250 ft.

600

1200 500 ft. 300 ft. 200 ft. 125 ft.

7.5

900

1800 350 ft. 200 ft. 125 ft. 100 ft.

1200 2400 250 ft. 150 ft. 100 ft.

1800 3600 150 ft. 100 ft. 65 ft.

2400

4800 125 ft. 75 ft.

50 ft.

CAUTION: Equipment damage can result from low voltage

LOAD APPLICATION
THREE PHASE LOAD
When calculating the power requirements for 3-phase power use the following equation:
NOTICE
If 3Ø load (kVA) is not given on the equipment nameplate, approximate 3Ø load may be determined by multiplying voltage by amperage by 1.732.
NOTICE
Motors and motor-driven equipment draw much greater current for starting than during operation.
An inadequate size connecting cable which cannot carry the required load can cause a voltage drop which can burn out the appliance or tool and overheat the cable. See Table 6. When connecting a resistance load such as an
incandescent lamp or electric heater, a capacity of up to the generating set's rated output (kW) can be used. When connecting a fluorescent or mercury lamp, a capacity of up to the generating set's rated output (kW) multiplied by 0.6 can be used. When connecting an electric drill or other power tools, pay close attention to the required starting current capacity.
When connecting ordinary power tools, a capacity of up to the generating set's rated output (kW) multiplied by 0.8 can be used.
DANGER
Before connecting this generator to any building's electrical system, a licensed electrician must install an isolation (transfer) switch. Serious damage to the building's electrical system may occur without this transfer switch.

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 25

GENERATOR OUTPUT VOLTAGES
A wide range of voltages are available to supply voltage for many different applications. Voltages are selected by using the voltage selector switch (Figure 13). To obtain some of the voltages as listed in Table 7 (see below) will require a fine adjustment using the voltage regulator (VR) control knob located on the control panel.
Voltage Selector Switch
The voltage selector switch (Figure 13) is located above the output terminal panel's Hard Wire Hook-up Panel. It has been provided for ease of voltage selection.

Figure 13. Voltage Selector Switch
Voltage Selector Switch Locking Button
The voltage selector switch has a locking button to protect the generator and load from being switched while the engine is running.To lock the voltage selector switch, press and hold the red button located at the bottom of the switch.
CAUTION
NEVER change the position of the voltage selector switch while the engine is running. ALWAYS place circuit breaker in the OFF position before selecting voltage.

Table 7. Voltages Available

Three Phase (Switchable)

208V

220V

240V

416V

440V

480V

Single Phase (Switchable)

120V

127V

139V

240V

254V

277V

GENERATOR OUTPUTS
Generator Amperage
Table 8 shows the maximum amps the generator can provide. DO NOT exceed the maximum amps as listed.

Table 8. Generator Maximum Amps

Rated Voltage

Maximum Amps

1Ø 120 Volt

155.5 X 2 amps (4 wire)

1Ø 240 Volt

77.8 amps (4 wire)

3Ø 240 Volt 3Ø 480 Volt

168 amps 84 amps

GFCI Receptacle Load Capability
The load capability of the GFCI receptacles is directly related to the voltage being supplied at either the output terminals or the 2 twist lock auxiliary receptacles.
Tables 9 and 10 show what amount of current is available at the GFCI receptacles when the output terminals and twist lock receptacles are in use. Be careful that your load does not to exceed the available current capability at the receptacles.

Table 9. 1Ø GFCI Receptacle Load Capacity

KW in Use Twist Lock (CS6369)
1Ø 240/120V
40.4 39.2

Available Load Current (Amps)
GFCI Duplex 5-20R 120V
0
5 amps/receptacle

38.0

10 amps/receptacle

38.6

15 amps/receptacle

35.6

20 amps/receptacle

Table 10. 3Ø Generator Maximum Amps

KVA in Use (UVWO Terminals)
3Ø 240/480V
70

Available Load Current (Amps)
GFCI Duplex 5-20R 120V
0 amps/receptacle

65.8

5 amps/receptacle

61.7

10 amps/receptacle

57.5

15 amps/receptacle

53.4

20 amps/receptacle

PAGE 26 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

GENERATOR OUTPUTS/GAUGE READING

HOW TO READ THE AC AMMETER AND AC VOLTAGE GAUGES
The AC ammeter and AC voltmeter gauges are controlled by the AC ammeter and AC voltmeter change-over switches.
Both of these switches are located on the control panel and DO NOT effect the generator output. They are provided to help observe how much power is being produced at the UVW terminals lugs.
Before taking a reading from either gauge, set the Voltage Selector Switch (Figure 14) to the position which produces the required voltage (For example, for 3Ø 240V, choose the center 3Ø 240/139V position on the voltage selector switch).

AC Ammeter Gauge Reading
Place the AC Ammeter Change-Over Switch (Figure 17) in the U position and observe the current reading (load drain) on the U terminal as indicated on the AC Ammeter Gauge (Figure 18). This process can be repeated for terminals V and W.

Figure 17. AC Ammeter Change-Over Switch

Figure 18. AC Ammeter (Amp Reading on U Lug)

NOTICE
The ammeter gauge will only show a reading when the Output Terminal Lugs are connected to a load and in use.

Figure 14. Voltage Selector Switch 240/139V 3Ø Position
NOTICE
For 3Ø 208V/1Ø,120V, place the Voltage Selector Switch in the 3 Phase 240/139 position.
AC Voltmeter Gauge Reading
Place the AC Voltmeter Change-Over Switch (Figure 15) in the W-U position and observe the phase to phase voltage reading between the W and U terminals as indicated on the AC Voltmeter Gauge (Figure 16).
120

Figure 15. AC Voltmeter Change-Over Switch

Figure 16. AC Voltmeter Gauge

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 27

OUTPUT TERMINAL PANEL CONNECTIONS

UVWO TERMINAL OUTPUT VOLTAGES
Various output voltages can be obtained using the UVWO output terminal lugs. The voltages at the terminals are dependent on the position of the Voltage Selector Switch and the adjustment of the Voltage Regulator Control Knob.
Remember the voltage selector switch determines the range of the output voltage. The voltage regulator (VR) allows the user to increase or decrease the selected voltage.
3Ø-240/139 UVWO Terminal Output Voltages
1. Place the voltage selector switch in the 3Ø 240/139 position as shown in Figure 19.

3. Turn the voltage regulator knob (Figure 21) clockwise to increase voltage output, turn counterclockwise to decrease voltage output. Use voltage regulator adjustment knob whenever fine tuning of the output voltage is required.
Figure 21. Voltage Regulator Knob
3Ø-208V/1Ø-120V UVWO Terminal Output Voltages 1. Place the voltage selector switch in the 3Ø 240/139
position as shown in Figure 22.

Figure 19. Voltage Selector Switch 3Ø-240/139V Position
2. Connect the load wires to the UVWO terminals as shown in Figure 20.

Figure 22. Voltage Selector Switch 3Ø-240/139V Position
2. Connect the load wires to the UVWO terminals as shown in Figure 23.

Figure 20. UVWO Terminal Lugs 3Ø-240/139V Connections

Figure 23. UVWO Terminal Lugs 3Ø-208/1Ø-120V Connections Connections
NOTICE
To achieve a 3Ø 208V output the voltage selector switch must be in the 3Ø-240/139 position and the voltage regulator must be adjusted to 208V.

PAGE 28 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

OUTPUT TERMINAL PANEL CONNECTIONS

3Ø-480/277V UVWO Terminal Output Voltages
1. Place the voltage selector switch in the 3Ø 480/277 position as shown in Figure 24.

1Ø-240/120V UVWO Terminal Output Voltages
1. Place the voltage selector switch in the 1Ø 240/120 position as shown in Figure 26.

Figure 24. Voltage Selector Switch 3Ø-480/277V Position
2. Connect the load wires to the UVWO terminals as shown in Figure 25.

Figure 26. Voltage Selector Switch 1Ø-240/120V Position
2. Connect the load wires to the UVWO terminals as shown in Figure 27.

Figure 25. UVWO Terminal Lugs 3Ø-440/254V Connections
3. Turn the voltage regulator knob (Figure 21) clockwise to increase voltage output, turn counterclockwise to decrease voltage output. Use voltage regulator adjustment knob whenever fine tuning of the output voltage is required.

Figure 27. UVWO Terminal Lugs 1Ø-200/100V Connections
3. Turn the voltage regulator knob (Figure 21) clockwise to increase voltage output, turn counterclockwise to decrease voltage output. Use voltage regulator adjustment knob whenever fine tuning of the output voltage is required.
NOTICE
ALWAYS make sure that the connections to the UVWO terminals are secure and tight.The possibility of arcing exists, that could cause a fire.

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 29

CIRCUIT BREAKERS To protect the generator from an overload, a 3-pole, 175 amp, main circuit breaker is provided to protect the U,V, and W Output Terminals from overload. In addition, two single-pole, 20 amp duplex circuit breakers are provided to protect the GFCI receptacles from overload. Three 50 amp load circuit breakers have also been provided to protect the auxiliary receptacles from overload. Make sure to switch ALL circuit breakers to the OFF position prior to starting the engine. LUBRICATION OIL Fill the engine crankcase with lubricating oil through the filler hole, but DO NOT overfill. Make sure the generator is level and verify that the oil level is maintained between the two notches (Figure 28) on the dipstick. See Table 11 for proper selection of engine oil.
Figure 28. Engine Oil Dipstick When checking the engine oil, be sure to check if the oil is clean. If the oil is not clean, drain the oil by removing the oil drain plug and opening drain valve. Refill with the specified amount of oil as outlined in the ISUZU Engine Owner's Manual. Oil should be warm before draining. Other types of motor oils may be substituted if they meet the following requirements: API Service Classification CC/SC API Service Classification CC/SD API Service Classification CC/SE API Service Classification CC/SF
Table 11. Recommended Motor Oil

INSPECTION/SETUP
FUEL CHECK
DANGER
Fuel spillage on a hot engine can cause a fire or explosion. If fuel spillage occurs, wipe up the spilled fuel completely to prevent fire hazards. NEVER smoke around or near the generator. Make sure engine is OFF before refueling.
Refilling the Fuel System
CAUTION
ONLY properly trained personnel who have read and understand this section should refill the fuel tank system.
This generator has an internal fuel tank located inside the generator enclosure (Figure 29). ALWAYS fill the fuel tanks with clean fresh #2 diesel fuel. DO NOT fill the fuel tanks beyond their capacities.
Pay attention to the fuel tank capacity when replenishing fuel. The fuel tank cap must be closed tightly after filling. Handle fuel in a safety container. If the container does not have a spout, use a funnel. Wipe up any spilled fuel immediately.
INTERNAL FUEL TANK

Figure 29. Internal Fuel Tank System
NOTICE DO NOT add fuel while engine is running. Stop engine and let cool before adding fuel.

PAGE 30 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

Refueling Procedure:
WARNING
Diesel fuel and its vapors are dangerous to your health and the surrounding environment. Avoid skin contact and/or inhaling fumes.
1. Level Tanks -- Make sure fuel cells are level with the ground. Failure to do so will cause fuel to spill from the tank before reaching full capacity (Figure 30).
CAUTION
ALWAYS place trailer on firm level ground before refueling to prevent spilling and maximize the amount of fuel that can be pumped into the tank.

Unlevel Ground Level Ground

DO NOT fill on

unlevel ground

Unlevel Ground Level Ground

Figure 30. Only Fill on Level Ground

NOTICE ONLY use #2 diesel fuel when refueling.

INSPECTION/SETUP
2. Remove fuel cap and fill tank with ultra low sulfer No. 2 diesel fuel (Figure 31).

DIESEL FUEL

FUEL TANK FILLER PORT

Figure 31. Fueling the Generator
3. NEVER overfill fuel tank -- It is important to read the fuel gauge when filling trailer fuel tank. DO NOT wait for fuel to rise in filler neck (Figure 32).

Figure 32. Full Fuel Tank
CAUTION
DO NOT OVERFILL fuel system. Leave room for fuel expansion. Fuel expands when heated (Figure 33).

Figure 33. Fuel Expansion

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 31

COOLANT (ANTIFREEZE/SUMMER COOLANT/ WATER)
ISUZU recommends ISUZU antifreeze/summer coolant for use in their engines, which can be purchased in concentrate (and mixed with 50% demineralized water) or pre-diluted. See the ISUZU Engine Owner's Manual for further details.
WARNING
If adding coolant/antifreeze mix to the radiator, DO NOT remove the radiator cap until the unit has completely cooled. The possibility of hot! coolant exists which can cause severe burns.

Day-to-day addition of coolant is done from the recovery tank. When adding coolant to the radiator, DO NOT remove the radiator cap until the unit has completely cooled. See Table 12 for engine, radiator, and recovery tank coolant capacities. Make sure the coolant level in the recovery tank is always between the "H" and the "L" markings.

Table 12. Coolant Capacity

Engine and Radiator

3.09 gal (11.7 liters)

Reserve Tank

2 quarts (1.9 liters)

Operation in Freezing Weather

When operating in freezing weather, be certain the proper amount of antifreeze (Table 13) has been added.

Table 13. Anti-Freeze Operating Temperatures

Vol % AntiFreeze
50

Freezing Point

°C

°F

-37

-34

Boiling Point

°C

°F

108

226

NOTICE
When the antifreeze is mixed with water, NEVER exceed a 60/40 antifreeze/water mix ratio. This ratio mix will provide protection to about -58°F (-50°C).

INSPECTION/SETUP
CLEANING THE RADIATOR The engine may overheat if the radiator fins become overloaded with dust or debris. Periodically clean the radiator fins with compressed air. Cleaning inside the machine is dangerous, so clean only with the engine turned off and the negative battery terminal disconnected. AIR CLEANER Periodic cleaning/replacement is necessary. Inspect it in accordance with the ISUZU Engine Owner's Manual. FAN BELT TENSION A slack fan belt may contribute to overheating, or to insufficient charging of the battery. Inspect the fan belt for damage and wear and adjust it in accordance with the ISUZU Engine Owner's Manual. The fan belt tension is proper if the fan belt bends 10 to 15 mm (Figure 34) when depressed with the thumb as shown below.
0.2~0.24 IN. (5~6MM)
DEFLECTION
Figure 34. Fan Belt Tension CAUTION
NEVER place hands near the belts or fan while the generator set is running.

PAGE 32 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

BATTERY
This unit is of negative ground DO NOT connect in reverse. Always maintain battery fluid level between the specified marks. Battery life will be shortened, if the fluid level are not properly maintained. Add only distilled water when replenishment is necessary.
DO NOT over fill. Check to see whether the battery cables are loose. Poor contact may result in poor starting or malfunctions. Always keep the terminals firmly tightened. Coating the terminals with an approved battery terminal treatment compound. Replace battery with only recommended type battery.
The battery is sufficiently charged if the specific gravity of the battery fluid is 1.28 (at 68° F). If the specific gravity should fall to 1.245 or lower, it indicates that the battery is dead and needs to be recharged or replaced.
Before charging the battery with an external electric source, be sure to disconnect the battery cables.
Battery Cable Installation
ALWAYS be sure the battery cables (Figure 35) are properly connected to the battery terminals as shown below. The red cable is connected to the positive terminal of the battery, and the black cable is connected to the negative terminal of the battery.
CAUTION
ALWAYS disconnect the negative terminal FIRST and reconnect negative terminal LAST.

POSITIVE

NEGATIVE

Figure 35. Battery Connections

INSPECTION/SETUP
When connecting battery do the following:
1. NEVER connect the battery cables to the battery terminals when the ECU Control Switch is in either the MANUAL position. ALWAYS make sure that the ECU Control Switch is in the OFF/RESET position when connecting the battery.
2. Place a small amount of battery terminal treatment compound around both battery terminals. This will ensure a good connection and will help prevent corrosion around the battery terminals.
NOTICE
If the battery cable is connected incorrectly, electrical damage to the generator will occur. Pay close attention to the polarity of the battery when connecting the battery.
CAUTION
Inadequate battery connections may cause poor starting of the generator, and create other malfunctions.
ALTERNATOR
The polarity of the alternator is negative grounding type. When an inverted circuit connection takes place, the circuit will be in short circuit instantaneously resulting the alternator failure.
DO NOT put water directly on the alternator. Entry of water into the alternator can cause corrosion and damage the alternator.
WIRING
Inspect the entire generator for bad or worn electrical wiring or connections. If any wiring or connections are exposed (insulation missing) replace wiring immediately.
PIPING AND HOSE CONNECTION
Inspect all piping, oil hose, and fuel hose connections for wear and tightness. Tighten all hose clamps and check hoses for leaks.
If any hose (fuel or oil) lines are defective replace them immediately.

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 33

GENERATOR START-UP PROCEDURE

BEFORE STARTING
CAUTION
The engine's exhaust contains harmful emissions. ALWAYS have adequate ventilation when operating. Direct exhaust away from nearby personnel.

STARTING
1. Place the voltage selector switch in the desired voltage position (Figure 38).

WARNING
NEVER manually start the engine with the main, duplex or auxiliary circuit breakers in the ON (closed) position.

1. Place the Main, Aux. and Duplex circuit breakers (Figure 36) in the OFF position prior to starting the engine.

MAIN CIRCUIT BREAKER

CS-6369 DUPLEX AUX. CIRCUIT CIRCUIT
BREAKERS BREAKERS

Figure 38. Voltage Selector Switch
STARTING (MANUAL) 1. Place the engine speed switch (Figure 39) in the LOW
(down) position.

OFF OFF OFF OFF OFF OFF
OFF

Figure 36. Main, Aux. and GFCI Circuit Breakers (OFF)
2. Make sure the voltage selector switch has been configured for the desired output voltage.
3. Connect the load to the receptacles or the output terminal lugs as shown in Figure 10. These load connection points can be found on the output terminal panel and the output terminal panel's hard wire hookup panel.
4. Tighten terminal nuts securely to prevent load wires from slipping out.
5. Close all engine enclosure doors (Figure 37).

Figure 39. Engine Speed Switch (Low) 2. Place the ECU control switch in the MANUAL position
to start the engine (Figure 40).
Figure 40. ECU Control Switch (Manual Position)
3. Depending on the temperature of the coolant (cold weather conditions), the pre-heat lamp (Figure 41) will light (ON) and remain on until the pre-heating cycle has been completed. After completion of the pre-heating cycle, the light will go OFF and the engine will start up automatically.

CORRECT

INCORRECT

Figure 37. Engine Enclosure Doors

Figure 41. Pre-Heat Lamp

PAGE 34 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

GENERATOR START-UP PROCEDURE

4. Once the engine starts, let the engine run for 1-2 minutes. Listen for any abnormal noises. If any abnormalities exist, shut down the engine and correct the problem. If the engine is running smoothly, place the engine speed switch (Figure 42) in the HIGH (up) position.

8. If the voltage is not within the specified tolerance use the voltage adjustment control knob (Figure 46) to increase or decrease the desired voltage.

Figure 42. Engine Speed Switch (High)
5. Verify that the engine running status LED on the ECU control module (Figure 43) is lit (ON) after the engine has started.

Figure 46. Voltage Adjust Control Knob
9. The ammeter (Figure 47) will indicate zero amps with no load applied. When a load is applied, the ammeter will indicate the amount of current that the load is drawing from the generator.

Figure 43. Engine Running (LED ON) 6. The generator's frequency meter (Figure 44) should
be displaying the 60 cycle output frequency in HERTZ.
60 Hz

Figure 47. Ammeter (No Load)
10. The engine oil pressure gauge (Figure 48) will indicate the oil pressure of the engine. Under normal operating conditions the oil pressure is approximately 42 to 71 psi. (290~490 kPa).

Figure 44. Frequency Meter 7. The generator's AC-voltmeter (Figure 45) will display
the generator's output in VOLTS.
120

Figure 48. Oil Pressure Gauge
11. The coolant temperature gauge (Figure 49) will indicate the coolant temperature. Under normal operating conditions the coolant temperature should be between 167°~203°F (75°~95°C) (Green Zone).

Figure 45. Voltmeter Meter

Figure 49. Coolant Temperature Gauge

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 35

GENERATOR SHUT-DOWN PROCEDURES

12. The tachometer gauge (Figure 50) will indicate the speed of the engine when the generator is operating. Under normal operating conditions this speed is approximately 1800 RPM's.

NORMAL SHUTDOWN PROCEDURE
To shutdown the generator, use the following procedure: 1. Place the Main, Aux. and Duplex circuit breakers as
shown in Figure 53 to the OFF position.

ON ON ON ON ON O N ON

Figure 50. Engine Tachometer Gauge

13. Place the Main, Aux. and Duplex circuit breakers in the ON position (Figure 51).

MAIN CIRCUIT BREAKER

CS-6369 DUPLEX AUX. CIRCUIT CIRCUIT
BREAKERS BREAKERS

MAIN CIRCUIT BREAKER

CS-6369 DUPLEX AUX. CIRCUIT CIRCUIT
BREAKERS BREAKERS

OFF OFF OFF OFF OFF OFF
OFF

Figure 53. Main, Aux. and Duplex Circuit Breakers (OFF)
2. Place the engine speed switch (Figure 54) in the "LOW" (down) position.

Figure 51. Main, Aux. and Duplex Circuit Breakers (ON)
14. Observe the generator's ammeter (Figure 52) and verify it reads the anticipated amount of current with respect to the load. The ammeter will only display a current reading if a load is in use.

Figure 54. Ignition Switch (Normal)
3. Let the engine cool by running it at low speed for 3-5 minutes with no load applied.
4. Place the ECU Control Switch (Figure 55) to the OFF/ RESET position.

Figure 52. Ammeter (Load) 15. The generator will run until manually stopped or an
abnormal condition occurs.
WARNING NEVER stop the engine suddenly except in an emergency.

Figure 55. ECU Control Switch (Off/Reset)
5. Verify that all status LEDs on the MPEC display are OFF (not lit).
6. Remove all loads from the generator.
7. Inspect entire generator for any damage or loosening of components that may have occurred during operation.
EMERGENCY SHUTDOWN PROCEDURE
1. Place the ECU Control Switch (Figure 55) in the OFF/ RESET position.

PAGE 36 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

NOTES
MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 37

MAINTENANCE

Table 14. Inspection/Maintenance

10 Hrs DAILY

250 Hrs

Check Engine Oil and Coolant Levels

Check Fuel Filter/Water Separator Bowl

Check Air Cleaner

Check Air Cleaner Element

Check for Leaks/Hoses/Clamps

Check for Loosening of Parts

Change Engine Oil and Oil Filter * 1

Clean Unit, Inside and Outside

Replace Fuel Filter Elements

Check Engine Mounts

Service Battery

Check Air Intake Hoses

Engine

Check Fan Belt Condition Check Automatic Belt Tensioner

Check Electrical Ground Connection

Clean Radiator, Check Cooling System

Coolant Solution Analysis, Add SCA's As Required

Pressure Test Cooling System

Check Engine Speed

Test Thermostats

Check and Adjust Engine Valve Clearance

Test Glow Plugs

Flush and Refill Cooling System

Clean Inside of Fuel Tank

Check Crankcase Ventilation Filter*2

Replace Air Cleaner Elements * 3

Measure Insulation Resistance Over 3M ohms

Generator

Check Rotor Rear Support Bearing

500 Hrs or Every 12 Months
X X X X X X X X X X X
X

3000 Hrs or Every 36 Months
X X X

OTHER
2 yrs. or 2000 hrs. 1000 hrs. 1500 hrs.
As Required

*1 During initial operation of a new engine, change oil and filter between a minimum of 100 hrs. and a maximum of 500 hrs. Service interval depends on type of oil.
*2 Minimal Service interval will be at least 1500 hrs. or when service indicator light turns on or as indicated by diagnostic guage. Critical emission related service requred before 1500 hrs. is not necessary. The emissions-related warranty is valid up to 1500 hrs.
*3 Replace primary air filter element when restriction indicator shows a vacuum of 625 mm (25 in. H20).

PAGE 38 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

GENERAL INSPECTION Prior to each use, the generator should be cleaned and inspected for deficiencies. Check for loose, missing or damaged nuts, bolts or other fasteners. Also check for fuel, oil, and coolant leaks. Use Table 14 as a general maintenance guideline Engine Side (Refer to the Engine Instruction Manual). Air Filter Dust Indicator
NOTICE
The air filter should not be changed until the indicator reads "RED". Dispose of old air filter. It may not be cleaned or reused.
The air filter indicator (Figure 53) is attached to the air filter. When the air filter element is clogged, air intake restriction becomes greater and the air filter indicator signal shows RED. When indicator is red, replace filter immediately. After changing the air filter, press the air filter indicator button to reset.
PUSH BUTTON TO RESET
25 INCHES H O 2 6.23 kPa
Figure 56. Air Filter Dust Indicator
AIR CLEANER
NOTICE
If the engine is operating in very dusty or dry grass conditions, a clogged air cleaner will result. This can lead to a loss of power, excessive carbon buildup in the combustion chamber and high fuel consumption. Change air cleaner more frequently if these conditions exist.
Every 250 hours: Remove air cleaner element (Figure 57) and clean the heavy duty paper element with light spray of compressed air. Replace the air cleaner as needed. This Isuzu diesel engine is equipped with a replaceable, high-density paper air cleaner element. This air cleaner is also equipped with an inner element (secondary) that is used as a backup filter should the primary element becomes damaged.

MAINTENANCE

CAUTION
Wear protective equipment such as approved safety glasses or face shields and dust masks or respirators when cleaning air filters with compressed air.
Primary and Secondary Air Cleaner Elements
1. Release the latches (Figure 57) that secures the cover to the air cleaner body.
2. Remove the air cleaner cover and set aside.
3. Remove both the primary and secondary air cleaner elements.
4. Check the air cleaner daily or before starting the engine
5. Check for and correct heavy buildup of dirt and debris along with loose or damaged components.
NOTICE
Operating the engine with loose or damaged air cleaner components could allow unfiltered air into the engine causing premature wear and failure.

6. To clean the primary element (paper air filter) as referenced in (Figure 57), tap the filter element several times on a hard surface to remove dirt, or blow compressed air (not to exceed 30 psi (207 kPa, 2.1 kgf/cm2) through the filter element from the inside out.
BODY
PRIMARY AIR FILTER ELEMENT

SECONDARY AIR FILTER ELEMENT

BLOW COMPRESSED AIR FROM THE INSIDE OUT

AIR FILTER INDICATOR LATCH

ARROW MARK (DUST PAN)
EVACUATOR VALVE

Figure 57. Air Cleaner
7. Clean the secondary element (paper air filter) as referenced in step 6.

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 39

8. Replace both elements if they are damaged or excessively dirty.
9. Clean the inside of the air cleaner body.
10. Reinstall the primary and secondary air filter elements back into air cleaner body.
11. Reinstall the air cleaner cover, and secure with latches.
DRAINING FUEL FILTER ELEMENT
NOTICE
Inspect the fuel filter daily. If the fuel filter (Figure 58) has collected a significant amount of water and sediment at the bottom of the cup, it should be drained off immediately.
1. Loosen the air bleeder plug (Figure 58) on the fuel filter body.
2. To discharge the fuel inside the fuel filter OPEN the drain valve on the fuel filter by turning the knob counterclockwise (A) approximately 3-1/2 turns until the valve drops down 1-inch (25.4 mm) and draining occurs(B).

MAINTENANCE
3. Let the residue or foreign substances inside the case flow into a suitable container.
FUEL FILTER ELEMENT REPLACEMENT 1. Use a filter wrench to remove the element case
(Figure 59) from the fuel filter body.
AIR BLEEDER PLUG
FILTER BODY
ELEMENT
FLOAT O-RING

FILTER BODY

AIR BLEEDER PLUG

ELEMENT CASE

FUEL FILTER DRAIN PLUG

A
OPEN

B C

DRAIN

Figure 58. Draining Fuel Filter

O-RING DRAIN PLUG
Figure 59. Fuel Filter Replacement
2. Wipe the inside of the filter body with a clean cloth to remove any foregn matter or debris that may have accumulated.
3. Insert the new fuel filter element into the element case.
4. Replace both o-rings. Coat each o-ring with a small amount of clean 15W-40 engine oil.
5. Reinstall element case first by hand until it makes contact with the fuel filter body surface.
6. Torque element case to 22.4 lb-ft (30 N.m). 7. Torque drain plug to 1.4 lb-ft (2.0 N.m).
8. Remove the air from the fuel system. Reference Isuzu

PAGE 40 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

Owner's Manual, "Bleeding the Fuel System".
ELECTROMAGNETIC FUEL PUMP (500 HOURS)
The filter inside the fuel pump (Figure 60) is either a paper type or steel mesh type depending on fuel pump type. Clean or replace the fuel pump filter as follows:
1. Disconnect any electrical connections that are attached to the fuel pump.
2. Prepare a fuel collector to drain the fuel into. Secure any fuel lines to prevent fuel from spilling.
3. Remove fuel pump from air compressor enclosure.
4. Next, remove the filter and gasket from the fuel pump housing.

MAINTENANCE
8. Check for fuel leaks.
Removing Water from the Fuel Tank
After prolonged use, water and other impurities accumulate in the bottom of the tank. Occasionally inspect the fuel tank for water contamination and drain the contents if required.
During cold weather, the more empty volume inside the tank, the easier it is for water to condense. This can be reduced by keeping the tank full with diesel fuel.
Cleaning Inside the Fuel Tank
If necessary, drain the fuel inside the fuel tank completely. Using a spray washer (Figure 61) wash out any deposits or debris that have accumulated inside the fuel tank.

Figure 60. Electromagnetic Fuel Pump
NOTICE When the fuel pump filter is removed, always make sure to replace both gaskets and clean the magnet portion inside the cover.
5. Clean or replace fuel pump filter. Replace both gaskets. 6. Reassemble fuel pump and mount back onto generator
enclosure. 7. Reconnect all fuel lines and electrical components.

FUEL TANK
Figure 61. Fuel Tank Cleaning
FUEL TANK INSPECTION
In addition to cleaning the fuel tank, the following components should be inspected for wear: Rubber Suspension -- look for signs of wear or
deformity due to contact with oil. Replace the rubber suspension if necessary. Fuel Hoses -- inspect nylon and rubber hoses for signs of wear, deterioration and hardening.

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 41

Fuel Tank Lining -- inspect the fuel tank lining for signs of excessive amounts of oil or other foreign matter.
DRIVE BELT (DAILY)
Drive Belt Tension
A slack drive belt may contribute to overheating, or to insufficient charging of the battery, adjust drive belt in accordance with the Isuzu Operator's manual. Drive Belt Inspection
Inspect the drive belt (Figure 62) for damage and wear. Horizontal cracks (across the belt) are acceptable.Vertical (direction of belt ribs) cracks that intersect with horizontal cracks are not acceptable. Also, examine the belt and determine if it is oil soaked or "glazed" (hard shiny appearance on the sides of the belt). Either of these two conditions can cause the belt to run hot, which can weaken it and increase the danger of it breaking. If the drive belt exhibits any of the above wear conditions, replace the drive belt immediately.
NO

MAINTENANCE
between the upper land lower limit (Figure 63) on the dipstick.

DO NOT OVERFILL

H (UPPER LIMIT)

L (LOWER LIMIT)

Figure 63. Dipstick Engine Oil Level
4. If oil level is low, add correct amount of engine oil to bring oil level to a normal safe level (See Recommended Viscosity Grades, Table 15).
5. Allow enough time for any added oil to make its way to the oil pan before rechecking.

5W/30 5W/40
10W 10W/30 10W/40 15W/40
20W/20 30 40

Table 15. Oil Selection Chart

OIL: SAE

122 50 104 40
86 30 68 20 50 10 32 0 -14 -10

-4 -20 -22 -30

-40 -40

NO
Figure 62. Drive Belt Inspection
ENGINE OIL (CHECK DAILY) 1. When checking or adding oil, place the machine so
the engine is level. 2. Pull the engine oil dipstick from its holder. 3. Determine if engine oil is low. Oil level should be

DRAINING ENGINE OIL
1. Run the engine until the engine coolant reaches a temperature of 140° (60°C) Turn the engine off.
2. Remove the oil dipstick from its holder. 3. Next, remove oil drain cap (Figure 64).

PAGE 42 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

4. Place the oil drain valve in then OPEN position and allow the oil to drain into a suitable container.

OIL DRAIN CAP
(REMOVE)

OIL DRAIN VALVE

OPEN

Figure 64. Draining Engine Oil 5. After engine oil has been completely drained, reinstall
drain bolt with sealing washer and tighten securely.
NOTICE For composite oil pans always install a new sealing washer.
ENGINE OIL FILTER REPLACEMENT
1. Clean the area around the lubricating oil filter head. 2. Using an oil filter wrench (Figure 65), remove engine
oil filter.

MAINTENANCE
with the filter head surface. Tighten it another 3/4 turn using the filter wrench.
5. Fill engine crankcase with high quality detergent oil classified "For Service CI-4. Fill to the upper limit of dipstick. DO NOT overfill. Reference Table 2 for engine crankcase oil capacity.
6. Run the engine for several minutes. Watch for oil leakage. Shut the engine down and allow it to sit for several minutes. Top off the oil to the upper limit on the dipstick.
FLUSHING OUT RADIATOR AND REPLACING COOLANT
WARNING
DO NOT remove the pressure cap from the radiator when the engine is hot! Wait until the coolant temperature is below 120°F (50°C) before removing pressure cap.
Heated coolant spray or steam can cause severe scalding and personal injury.
1. Place the coolant drain valve in the OPEN position (Figure 66) and allow the coolant to drain into a suitable container.

OIL FILTER WRENCH

RUBBER SEAL
OIL

ENGINE OIL FILTER CARTRIDGE

COAT SEAL WITH THIN LAYER OF OIL

Figure 65. Engine Oil Filter Removal
3. Coat the rubber seal (gasket) surface of oil filter (Figure 65) with clean 15W-40 engine oil.
4. Install new oil filter first by hand until it makes contacts

COOLANT DRAIN VALVE
(OPEN)
Figure 66. Draining Engine Coolant 2. Check hoses for softening and kinks. Check clamps
for signs of leakage.

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 43

3. Remove and inspect radiator cap. 4. Flush the radiator by running clean tap water through
radiator until signs of rust and dirt are removed. DO NOT clean radiator core with any objects, such as a screwdriver. 5. Tighten water cock and replace the overflow tank. 6. Place the coolant drain valve in the CLOSED position. 7. Replace with coolant as recommended by the engine manufacturer. 8. Reinstall radiator cap. Tighten securely.
WARNING Allow engine to cool when flushing out radiator. Flushing the radiator while hot could cause serious burns from water or steam.
RADIATOR CLEANING The radiator (Figure 67) should be sprayed (cleaned) with a high pressure washer when excessive amounts of dirt and debris have accumulated on the cooling fins or tube. When using a high pressure washer, stand at least 5 feet (1.5 meters) away from the radiator to prevent damage to the fins and tube.
Figure 67. Radiator Cleaning

MAINTENANCE
JACKETWATER HEATER AND INTERNAL BATTERY CHARGER 120 VAC INPUT RECEPTACLES (OPTIONAL)
This generator can be equipped as an option with a engine block heating element and an internal battery charger. They are provided with electric cords to connect to a commercial power source.
The engine block heating element and internal battery charger both require 120 VAC in order to operate. A receptacle (Figure 68) has been provided on the output terminal panel to allow commercial power to be applied.
These units will ONLY function when commercial power has been supplied to them. When using extension cords, refer to Table 6 for the correct size and length.
When using the generator in hot climates there is no need to apply power to jacket water heater. However, if the generator will be used in cold climates, it is best to apply power to the jacket water heater at all times.
If the generator will be used daily, the battery should normally not require charging. If the generator will be idle (not used) for long periods of time, apply power to the battery charger receptacle via commercial power using a power cord of adequate size.
GENERATOR STORAGE
For long term storage of the generator the following is recommended:
Drain the fuel tank completely. Treat with a fuel stabilizer if necessary.
Completely drain the oil from the crankcase and refill if necessary with fresh oil.
Clean the entire generator, internal and external.
Cover the generating set and store in a clean, dry place.
Disconnect the battery.
Make sure engine coolant is at proper level.
If generator is mounted on a trailer, jack trailer up and place on blocks so tires do not touch the ground or block and completely remove the tires.

PAGE 44 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

NOTICE If the generator will be idle (not used) for long periods of time and to ensure adequate starting capability, always have power applied to the generator's internal battery charger.
BATTERY CHARGER

MAINTENANCE

JACKET WATER HEATER

OUTPUT TERMINAL PANEL ASSEMBLY

BATTERY CHARGER/ JACKET WATER HEATER
120 VAC INPUT RECEPTACLE

Figure 68. Battery Charger and Jacket Water Heater (Option)

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 45

GENERATOR WIRING DIAGRAM

CN1

12 3
AJ C BKD

12 3
CN3 U V W

CONNECTER ARRANGEMENT (WIRING VIEW)

12 3 4
CN5 V2 V2 - +
12 3 4
CN6 V1 V1 - +

CN8 CN9

12
41 98
3 21
642

12
CN4 1 3

CN11

321
W1 V1 U1 1 U2 3 W2

CN7

21
BB

12 3
CN10 R S T

12 3 U1 V1 W1
CN12 U2 1
W2 3

COLOR CODE

SYM. WIRE COLOR SYM. WIRE COLOR

B BLACK

R RED

L BLUE

W WHITE

BR BROWN

Y YELLOW

G GREEN

LB LIGHT BLUE

GR GRAY

LG LIGHT GREEN

V VIOLET

O ORANGE

P PINK

Notice:
1. No designation lead size : 1.25

SYMBOL Ar Fg ExAr ExFg Re AVR VR
CT 1,2,3 AS A VS V F CB1
CB2,3,4 CB5,6 CON1,2,3 CON5,6
OC SW RY1,2 Re1

DESIGNATION MAIN GENERATOR ARMATURE WINDING MAIN GENERATOR FIELD WINDING EXCITER ARMATURE WINDING EXCITER FIELD WINDING RECTIFIER AUTOMATIC VOLTAGE REGULATOR VOLTAGE REGULATOR (RHEOSTAT) CURRENT TRANSFORMER CHANGE-OVER SWITCH,AMMETER AC.AMMETER CHANGE-OVER SWITCH,VOLTMETER AC.VOLTMETER FREQUENCY METER CIRCUIT BREAKER 3P 110A CIRCUIT BREAKER 2P 50A CIRCUIT BREAKER 1P 20A RECEPTACLE 250V 50A RECEPTACLE 125V 20A OVER CURRENT RELAY SELECTOR SWITCH RELAY UNIT RECTIFIER

PAGE 46 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

ENGINE WIRING DIAGRAM
MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 47

COLOR CODE

SYM. WIRE COLOR SYM. WIRE COLOR

B BLACK

R RED

L BLUE

W WHITE

BR BROWN

Y YELLOW

G GREEN

LB LIGHT BLUE

GR GRAY

LG LIGHT GREEN

V VIOLET

O ORANGE

P PINK

TROUBLESHOOTING (GENERATOR)

Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a breakdown, use Table 16 shown below for diagnosis of the Generator. If the problem cannot be remedied, consult our company's business office or service plant.

Symptom No Voltage Output
Low Voltage Output High Voltage Output Circuit Breaker Tripped

Table 16. Generator Troubleshooting

Possible Problem

Solution

AC Voltmeter defective?

Check output voltage using a voltmeter.

Is wiring connection loose? Check wiring and repair.

Is AVR defective?

Replace if necessary.

Defective Rotating Rectifier? Check and replace.

Defective Exciter Field?

Check for approximately 17.3 ohms across J & K on CN1

Is engine speed correct?

Place engine speed switch in "High" position.

Is wiring connections loose? Check wiring and repair.

Defective AVR?

Replace if necessary.

Is wiring connections loose? Check wiring and repair.

Defective AVR?

Replace if necessary.

Short Circuit in load?

Check load and repair.

Over current?

Confirm load requirements and reduce.

Defective circuit breaker? Check and replace.

Over current Relay actuated? Confirm load requirement and replace.

PAGE 48 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

TROUBLESHOOTING (DIAGNOSTIC LAMP)
The engine controller of this generator diagnoses problems that arise from the engine control system and the engine itself. Press the diagnostic button (Figure 69) on the diagnostic panel to determine if an engine malfunction has occurred.
Figure 69. Diagnostic Panel
METHOD OF OPERATION 1. Normally, the diagnostic lamp will be dimly lit when
the ECU Control Switch is placed in the MANUAL position. 2. If engine trouble occurs, the diagnostic lamp will be brightly lit as long as the control switch is left in the manual position. 3. The diagnostic lamp will indicate that an engine malfunction has occurred. NOTICE For a complete understanding of error codes and troubleshooting procedures, refer to the enclosed engine instruction manual. NOTICE If the engine is cranked while the diagnostic switch is in the "ON" position, the engine will not be stopped even if the starter switch is turned to the "OFF" position. In such case, turn the diagnostic switch to the "OFF" position.
MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 49

A
12

BATTERY CHARGER WIRING DIAGRAM
BLACK 14 AWG. LINE (L)120VAC INPUT

WHITE 14 AWG. NEUTRAL (N) GREEN 14 AWG. GROUND (G)

B
34

3
B

TO CHASSIS GROUND
GREEN 16 AWG.
TO STARTER "B" TERMINAL
RED 16 AWG.

A
4

120 VAC INPUT, INSERT EXTERNAL POWER CORD HERE.

NOTES: 1 NEMA 5-15, 15A, 120 VAC, P/N HBL5278C/HUBBLE RECEPTACLE. 2 RECEPTACLE IS MOUNTED ON OUTPUT TERMINAL PANEL ASSY. 3 20 AMP, 5-20R RECEPTACLE, P/N HBL5369C/HUBBLE RECEPTACLE. 4 CORD, CAROL 3/C 14 AWG., P/N EE56557.
PAGE 50 -- MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18)

JACKET WATER HEATER WIRING DIAGRAM
BLACK 14 AWG. LINE (L)120VAC INPUT

A
12

WHITE 14 AWG. NEUTRAL (N) GREEN 14 AWG. GROUND (G)

B
34

BLOCK HEATER (P/N 44558)

3
B

BLACK 14 AWG. LINE (L)120VAC INPUT
WHITE 14 AWG. NEUTRAL (N)
GREEN 14 AWG. GROUND (G)

TEMP. SWITCH
HEATING 120 VAC ELEMENT

GROUND

A
4

120 VAC INPUT, INSERT EXTERNAL POWER CORD HERE.

NOTES: 1 NEMA 5-15, 15A, 120 VAC, HBL5278C/HUBBLE RECEPTACLE. 2 RECEPTACLE IS MOUNTED ON OUTPUT TERMINAL PANEL ASSY. 3 20 AMP, 5-20R RECEPTACLE, P/N EE6131 (HBL5369C/HUBBLE RECEPTACLE). 4 CORD, CAROL 3/C 14 AWG., P/N EE56557.

MQP56 60 HZ GENERATOR · OPERATION MANUAL -- REV. #1 (01/24/18) -- PAGE 51

OPERATION MANUAL

HERE'S HOW TO GET HELP
PLEASE HAVE THE MODEL AND SERIAL NUMBER ON-HAND WHEN CALLING

UNITED STATES Multiquip Corporate Office

18910 Wilmington Ave. Carson, CA 90746 Contact: mq@multiquip.com
Service Department

Tel. (800) 421-1244 Fax (310) 537-3927

800-421-1244 310-537-3700
Technical Assistance

Fax: 310-537-4259

800-478-1244

Fax: 310-943-2238

CANADA

Multiquip

4110 Industriel Boul. Laval, Quebec, Canada H7L 6V3 Contact: jmartin@multiquip.com

Tel: (450) 625-2244 Tel: (877) 963-4411 Fax: (450) 625-8664

MQ Parts Department
800-427-1244 310-537-3700

Fax: 800-672-7877 Fax: 310-637-3284

Warranty Department
800-421-1244 310-537-3700

Fax: 310-943-2249

UNITED KINGDOM

Multiquip (UK) Limited Head Office

Unit 2, Northpoint Industrial Estate, Globe Lane, Dukinfield, Cheshire SK16 4UJ Contact: sales@multiquip.co.uk

Tel: 0161 339 2223 Fax: 0161 339 3226

© COPYRIGHT 2018, MULTIQUIP INC. Multiquip Inc, the MQ logo are registered trademarks of Multiquip Inc. and may not be used, reproduced, or altered without written permission. All other trademarks are the property of their respective owners and used with permission. This manual MUST accompany the equipment at all times. This manual is considered a permanent part of the equipment and should remain with the unit if resold. The information and specifications included in this publication were in effect at the time of approval for printing. Illustrations, descriptions, references and technical data contained in this manual are for guidance only and may not be considered as binding. Multiquip Inc. reserves the right to discontinue or change specifications, design or the information published in this publication at any time without notice and without incurring any obligations.
Your Local Dealer is:

Adobe InDesign CC 2017 (Windows) Adobe PDF Library 15.0