Mitsubishi Heavy Industries Air-Conditioner User Manual

Brand: Mitsubishi Heavy Industries

Model Series: SRK15ZTL-W, SRK20ZTL-W, SRK25ZTL-W, SRK35ZTL-W, SRK50ZTL-W

Introduction

Thank you for choosing a Mitsubishi Heavy Industries Thermal Systems, Ltd. air conditioner. Please read this user manual carefully before use and keep it in a safe place for future reference.

Safety Symbols:

⚠️ WAARSCHUWING: Potentially hazardous situation, could result in death or serious injury if not avoided.
❗ OPGELET: Potentially hazardous situation, could result in minor or moderate injury or property damage if not avoided.

Symbol Meanings:

? Strikt verboden (Strictly forbidden)
➡️ Follow instructions carefully
? Ensure proper grounding
? Read user manual
ℹ️ Information in user/installation manual
? Maintenance by qualified personnel only

Note on R32 Refrigerant: This equipment uses flammable refrigerants. Leaks may ignite.

Safety Instructions

General Safety

Do not operate if improperly installed.
Use only for intended purpose.
Avoid areas with flammable gases.
Do not block air inlets/outlets.
Do not insert foreign objects.
Do not touch moving parts.
Do not spray water directly on the unit.
Do not operate with wet hands.
Do not attempt self-repair.
Dispose of unit according to regulations.

Installation Safety

For household use only.
Professional installation required.
Ensure proper grounding.
Do not install near flammable gas leaks.
Ensure drain hose is properly installed.

Operation Safety

Keep children away from the unit.
Avoid prolonged exposure to cool air.
Do not insert objects into air outlets.
Keep remote control away from children.
Do not use for storing items.
Do not place water-filled objects on the unit.
Avoid directing airflow at plants or animals.
Do not step on or sit on the unit.
Regularly check unit support structure.

Maintenance Safety

Turn off power before maintenance.
Do not touch heat exchanger fins.
Use a stable platform for access.
Use only approved cleaning agents.
Contact dealer for internal cleaning/repairs.
Damaged power cord requires professional replacement.

Wireless LAN Precautions

Avoid use near sensitive electronic equipment.
Do not use in hospitals or areas where wireless devices are prohibited.
Avoid use near individuals with pacemakers.
Do not use near other wireless devices or microwaves.
Check unit status and environment when operating remotely.

Parts Identification

Indoor Unit

Air Inlet Panel: Access to filters.
Air Filter: Captures dust.
Ventilator: Circulates air.
Heat Exchanger: Transfers heat.
Louvers: Adjusts horizontal airflow.
Flaps: Adjusts vertical airflow.
Air Outlet: Discharges conditioned air.
Room Temperature Detector: Senses room temperature.
Display Panel: Shows status.
QR Code: For Wi-Fi credentials.
Air Cleaning Filter: Allergen-removing filter.

Outdoor Unit

Air Inlet: Draws outside air.
Ventilator: Circulates refrigerant.
Heat Exchanger: Transfers heat.
Air Outlet: Discharges air.
Drain Hole: Condensate drainage.
Model Name/Refrigerant Type: Identification plate.
Connections: For refrigerant piping and wiring.
Drain Hose: Carries condensation.

Remote Control

Display Panel

Shows operating status, temperature, timer settings.

Buttons and Functions

ON/OFF: Starts/stops operation.
TEMP/TIMER: Sets temperature and timer.
FAN SPEED/PRESET: Adjusts fan speed or recalls preset settings.
OPERATION MODE: Selects AUTO, COOL, HEAT, DRY, FAN.
SLEEP: Activates Sleep Timer.
ALLERGEN CLEAR: Activates Allergen Clear mode.
3D AUTO: Optimizes airflow distribution.
ON TIMER: Sets ON timer.
OFF TIMER: Sets OFF timer.
Hi/ECO: Selects High Power or Economy mode.
NIGHT SETBACK: Maintains ~10°C for energy saving.
SILENT: Reduces noise.
AIRFLOW U/D: Adjusts vertical airflow.
AIRFLOW L/R: Adjusts horizontal airflow.
Child Lock: Locks buttons.
CANCEL: Cancels timer settings.
MENU: Accesses advanced settings.
TIME SET UP: Sets current time.
ACL: Resets remote control.

Accessories

Remote Control
Holder
Batteries (2x AAA)
Mounting Screws
Allergen-removing filter

Operation Notes

Beep sounds confirm commands.
RUN indicator (green) shows operation status.
TIMER indicator (yellow) shows timer status.

Operating Modes and Functions

Setting Current Time

Follow steps using TIME SET UP switch and TEMP/TIMER buttons.

AUTO Mode

Automatically selects COOL, HEAT, or FAN based on room temperature.

Press MODE to select AUTO.
Press ON/OFF to start.

Temperature Adjustment (AUTO Mode)

Adjust temperature between 18°C and 30°C using TEMP/TIMER (∧/∨) buttons.

FAN SPEED

Adjust fan speed (AUTO, ULo, Lo, Me, Hi) in most modes.

COOL/HEAT/DRY/FAN Modes

Press MODE to select mode.
Press ON/OFF to start.
Use TEMP/TIMER for temperature.
Use FAN SPEED for fan speed.

HEAT Mode Features

Extracts heat from outside air. Capacity decreases in cold weather. Defrosting may occur.

Airflow Direction

Use AIRFLOW U/D and L/R buttons. Louvers can oscillate or stop at a set position.

3D AUTO Mode

Optimizes airflow for even distribution. Available in AUTO, COOL, HEAT.

SLEEP Timer

Stops unit automatically after set time, adjusting temperature for comfort.

OFF Timer

Stops unit at a preset time.

ON Timer

Starts unit 5-60 minutes before a preset time.

SLEEP Timer + ON Timer

Combined operation of SLEEP and ON timers.

PROGRAM Timer

Daily automatic operation combining ON and OFF timers.

ALLERGEN CLEAR

Removes allergens using enzyme technology. Best used when room is unoccupied.

HIGH POWER / ECONOMY

HIGH POWER: Boosts performance for 15 mins.
ECONOMY: Saves energy with reduced operation.

NIGHT SETBACK

Maintains ~10°C in cold seasons to prevent excessive cooling/heating when unoccupied.

SILENT Mode

Reduces outdoor unit noise.

MENU Functions

Wireless LAN Setup: Network connectivity.
Backlight/Brightness: Adjust display settings.
SELF CLEAN: Removes moisture to prevent mold.
Fan during Heating Thermo-OFF: Fan runs when heating is off.
SILENT Mode Setup: Adjusts noise levels.
Wireless LAN Communication: Enable/disable Wi-Fi.

Preset Mode

Save and recall preferred settings.

Maintenance

Air Filter Cleaning

Clean filters every two weeks. Remove, vacuum or wash, and dry thoroughly.

Unit Cleaning

Wipe with a soft cloth. Use damp cloth for stubborn dirt. Front panel can be washed.

Seasonal Checks

End of Season: Run fan to dry interior, turn off power, remove remote batteries.
Start of Season: Check grounding, airflow, obstructions.

Air Cleaning Filter Replacement

Replace allergen-removing filter annually or when ineffective. Contact dealer.

Troubleshooting

Common Issues

No Operation: Check power, timer, circuit breaker.
Poor Cooling/Heating: Check settings, filter, doors/windows, room conditions.
Strange Noises: Refer to "Good to Remember" for explanations.
Remote Not Working: Check batteries, obstructions, sunlight.

Self-Diagnosis

Error codes indicated by RUN/TIMER light blinks. Consult table for causes and solutions.

Indicator	Problem	Cause
RUN (1-7 blinks)	Indoor sensor faults, LAN fault, circuit fault, motor fault, refrigerant issue.	Broken wires, poor connections, sensor defects, motor failure, leaks.
TIMER (4-7 blinks)	Outdoor sensor faults, drain/suction faults, power issues, compressor issues, signal faults, fan motor faults, cooling protection.	Broken wires, poor connections, sensor defects, compressor issues, power supply, faulty boards, motor failure, overload.
RUN (2 blinks)	Rotor lock, compressor phase loss, outdoor board fault.	Defective compressor, phase loss, faulty board.
RUN (7 blinks)	Service valve closed.	Service valve closed.

Contact dealer if problems persist.

Declarations of Conformity

EU Declaration

Mitsubishi Heavy Industries Thermal Systems, Ltd. declares conformity with EU directives (Machinery 2006/42/EC) and standards (EN 60335-1, EN 60335-2-40) for Split Type Air Conditioners (SRK/SRC Series models). Authorised Representative: MHIAE SERVICES B.V.

UK Declaration

Mitsubishi Heavy Industries Thermal Systems, Ltd. declares conformity with UK directives (Supply of Machinery Regulations S.I. 2008/1597) and standards (EN 60335-1, EN 60335-2-40) for Split Type Air Conditioners (SRK/SRC Series models). Authorised Representative: MITSUBISHI HEAVY INDUSTRIES AIR-CONDITIONING EUROPE, LTD.

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