2021-06-14 — Air Conditioner Service Manual. Remote Control. Note : The remote controller is not presetting as Cooling Only Air Conditioner or Heat Pump by manufacturer.
6(59,&(0$18$/
Models
MGTC0913E-20 /MGTC0913C-20 MGTC0923E-20 /MGTC0923C-20 MGTC1213E-20 /MGTC1213C-20 MGTC1223E-20 /MGTC1223C-20 MGTC1823E-20 /MGTC1823C-20 MGTC2423E-20 /MGTC2423C-20 MGTC3623E-17 /MGTC3623C-17
CONTENTS
1. Important Notice 2. Product Dimensions 3. Refrigeration cycle diagram 4. Operation details 5. Wiring diagram 6. Explosion view and parts 7. Precaution 8. Names of parts 9. Installation manual 10. Trouble shooting
Air Conditioner Service Manual
1. Important Notice
This service manual is intended for use by individuals possessing adequate backgrounds of electrical, electronic and mechanical experience. Any attempt to repair the appliance may result in personal injury and property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.
The information, specifications and parameter are subject to change due to technical modification or improvement without any prior notice. The accurate specifications are presented on the nameplate label.
How to order spare parts
To have your order filled promptly and correctly, please furnish the following information:
1. Model No. with Indoor or Outdoor
2. No. in the Explosion View
3. Part Name
4. The quantity you ordered
1
Air Conditioner Service Manual
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,QGRRU8QLW
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Model
Indoor unit
Outdoor unit
A
BCDE F
G
H
I
J K
MGTC0913E20/MGTC0913C20 811 203 292 810 549 305 433.8 305 278 48 55
MGTC0923E20/MGTC0923C20 811 203 292 787 498 290 415 291 225 48.5 52
MGTC1213E20/MGTC1213C20 811 203 292 810 549 305 433.8 305 278 48 55
MGTC1223E20/MGTC1223C20 811 203 292 787 498 290 415 291 225 48.5 52
MGTC1823E20/MGTC1823C20 1010 220 315 863 602 349 518 357 329 55 63
MGTC2423E20/MGTC2423C20 1186 258 340 927 699 380 586 374.9 347.5 58.6 63
MGTC3623E17/MGTC3623C17 1186 258 340 975 808 433 675 399 378 50 63
2
Air Conditioner Service Manual
3. Refrigeration cycle diagram
Cooling only
Liquid side 2-way valve
Capillary
Heat exchange (Evaporator)
Heat exchange (condenser)
Heat pump
Heat exchange (Evaporator)
Gas side 3-way valve
Accumulator
Compressor
Liquid side 2-way valve
Check valve
Capillary Assembly Heat exchange (condenser)
Gas side 3-way valve
Accumulator
4-way valve
Compressor
Heating Cooling
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Air Conditioner Service Manual
4.Operation Details
Remote controller
1 CLOCK
Press this button to set the time. When the time is flashing, press or to adjust the time. Every press equals one minute,or press and hold for rapid adjustment. Press CLOCK again once the time has been set.
2 .TEMP DOWN button
Decrease the temperature or time by 1 unit.
3 ON/OFF button
To switch the conditioner on and off.
4 FAN SPEED button
To select the fan speed of auto/low/mid/high.
5 TIMER button
To set automatic switching-on/off.
6 SLEEP button
To activate the function SLEEP .
14 7 MODE button
1
13
To select the mode of operation.
12 8 SUPER button
In cooling mode, press this button, the unit will give
2
the maximum cooling temperature with 16
11
In heating mode, press this button, the unit will give
3
the maximum heating temperature with 31 .
9 ECO button
4
10
In cooling mode,press this button ,the temperature will increase 2 on the base of setting temperature:
9
In heating mode, press this button, the temperature will decrease 2 on the base of setting temperature.
5
9
8 10 SWING button
To activate or deactivate of the movement of the
6
7
DEFLECTORS .
11 TEMP UP button
Increase the temperature or time by 1 unit.
12 DISPLAY button 9 To switch on/off the LED display (if present).
1123 3D 9 When you press "3D", the horizontal and vertical
9 vanes will swing together at the same time.
142 HEALTHY button
To switch - on /off HEALTHY function. It is a button which controls the ionizer or plasma generator only for inverter type.
Note: Each mode and relevant function will be further specified in following pages.
Remote Control The remote controller is not presetting as Cooling Only Air Conditioner or Heat Pump by manufacturer. Each time after the remote controller replace batteries or is energized, the arrowhead will flashes on the front of
Heat or Cool on LCD of the remote controller. User can preset the remote controller type depending on the air conditioner type you have purchased as follows: Press any button when the arrowhead flashes on the front of Cool , Cooling Only is set. Press any button when the arrowhead flashes on the front of Heat , Heat Pump is set. If you don t press any button within 10 seconds, the remote controller is preset as Heat Pump automatically.
Note : If the air conditioner you purchased is a Cooling Only one, but you preset the remote controller as Heat Pump, it doesn t bring any matter. But if the air conditioner you purchased is a Heat Pump one, and you preset the remote controller as Cooling Only, then you CAN NOT preset the Heating operation with the remote controller.
4
Air Conditioner Service Manual
Electronic Controller
1. Safety Protection
(1) Time Delay for Safety protection
z 3 minutes delay for compressor ---The compressor is ceased for 3minutes before restarting to
balance the pressure in the refrigeration cycle in order to protect the compressor.
z 2 minutes delay for 4-way valve---The 4-way valve will be ceased for 2 minutes late after
compressor to prevent the refrigerant-gas abnormal noise when the HEATING operation is
OFF or switch to the other operation mode.
(2) Discharge temperature protection
There is a temperature sensor on top of compressor, when temperature on top of compressor
exceeded the limit, system control will shut down the compressor and the display board will
show the error code.
(3) Lower voltage protection
When AC voltage 158V and keep it for 10 seconds, unit will be shut down for protection.
(4) Over voltage protection
When AC voltage 260V, unit will be shut down and recover while AC255V.
(5) Over current protection
When the current of outdoor unit is overload, controller shut down the unit immediately and show
error code.
(6) Compressor abnormity protection
When compressor start on or in the process of running, if there is no feedback to controller or
load of compressor is abnormity, the air conditioner will shut down, and show error code.
(7) IPM module protection
IPM module has high temperature & over current protection itself, if there is signal feedback to
IPM, the outdoor unit will shut down, LED on outdoor PCB will show the error code.
2. "Feel" Mode Operation
(1) When the "Feel" mode is selected, the operation mode and initial temperature set are
determined by the initial room temperature at start-up of the operation except to turn off the air
conditioner and operates it again.
(2) If the mode is change to "Feel" from other mode, the "Feel" mode doesn't operate until
compressor stop for more than 3 minutes.
Mode
Initial Room Temperature
Initial Set Temperature
COOLING
RT=26
23
DRY
26!RT20
RT-2
HEATING for Heat Pump/
RT<20
-
FAN for Cooling Only
z In the "Feel" mode, when the controller receives the up or down signal of temperature, the set temperature can adjust by 1 upper or lower. The biggest you can adjust by 2 upper or lower.
3. "COOLING" Mode Operation
(1) Compressor frequency control According to difference room temperature and set temperature (t = RT-ST), running frequency of
compressor is controlled by electronic controller. When room temperature is much higher than set temperature, the compressor will start at a high frequency, and as room temperature goes down, the compressor running frequency will go down. When room temperature is lower than set temperature,
5
Air Conditioner Service Manual
the compressor will run at very low frequency. In general, unit will change its running frequency
according tot to make room temperature closing to set temperature.
(2) Outdoor temperature affects running frequency of the compressor
Outdoor temperature affect compressor's running frequency. Difference inlet temperature of
outdoor unit is adapted by difference compressor running frequency. While outdoor temperature is about 30, the compressor will run in high frequency.
If unit run in "cooling" mode and outdoor temperature is less than -2,the controller will shut down compressor and show error code, while the ambient temperature is over 1, the compressor will run
automatically.
(3) Auto fan control in cooling mode In cooling mode (include cooling in "feel" mode), fan speed is determined by t, as the following
diagram:
RTST
t come down
t come up
High fan
Min fan
Low fan
4."DRY" Mode Operation
(1) The system for DRY operation used the same refrigerant circle as the cooling one.
(2) When the system operates in DRY mode, at first it operates in cooling mode, the set temperature (ST) is "RT-2". After that, t he system will operate in cooling mode with lowest fan speed for 30 minutes and then change to middle speed for 30seconds as a cycle. During the course of this operation, you can't use remote controller to adjust the fan speed but you can control the vane direction.
(3) In the dry mode, when RT12WKHFRPSUHVVRUZLOOVWRSDQGRSHUDWHVDJDLQDW57 5. "HEATING" Mode Operation (available for Heat Pump only)
(1) Frequency control
Same as the frequency control in cooing mode, the running frequency of compressor is controlled by controller. Unit change its running frequency according to t to make the room
temperature closing to the set temperature.
(2) Indoor fan motor control
1) Cold Air Prevention Control
z The function is intended to prevent cold air from being discharged when heating mode
selected or while in defrosting.
z The indoor fan speed will be controlled as following.
Temperature up
37
Setting
33
Low fan
34
25
Breeze
28
Stop
22
Temperature down
z In heating operation, if air conditioner turn off, the indoor fan motor will run most for 30
6
Air Conditioner S ervice Manual
seconds since the stop of compressor.
2) Auto fan control (heating) In heating mode (include in "I feel" mode) , fan speed is determined by t as the following:
RTST t come down t come up
High fan
Min fan
Low fan
(3) 4-way valve control
In heating mode, 4-way valve will power on ahead of compressor for 5 seconds, and cut off
for 2 minutes later than compressor. 4-way valve will not power off unless the machine to be
switched off, mode changed or on the process of defrosting.
(4) Defrosting
Defrosting is controlled by the microprocessor.
When one of the following conditions is satisfied, unit comes into defrosting:
a. Outdoor heat exchanger Temperature (OPT) is continuously less than 3 while the unit runs for more than 40 minutes, and OPT is keeping under -6 for more than 3 minutes.
b. Outdoor heat exchanger Temperature (OPT) is continuously less than 3 meanwhile the unit runs for more than 80 minutes, and OPT is keeping under -4 for more than 3 minutes.
c. Outdoor heat exchanger Temperature (OPT) is continuously less than 3 while the unit runs for more than 120 minutes, and OPT is keeping below -2 for more than 3 minutes.
Before the air con comes into defrosting, compressor running frequency drop down to a
lower frequency firstly, then the compressor shuts down.
In defrosting, the max. frequency of compressor is F9 (a little less than the highest
frequency ). In this period all protection function are available.
Compressor
ON
4-way valve
OFF
ON
OFF
Expansion valve NORMAL
800
Outdoor fan motor ON
OFF
50S 10S 'HIURVWLQJWLPH 10Mins 15S 15S
In defrosting, LED showing by winking. No matter what AC come into or out of defrosting, indoor fan motor speed is the same as Cold Air Prevention Control. While one of the following conditions is satisfied, unit comes out of defrosting and shifts to heating mode: a. Outdoor coil Temperature (OPT) 15 b. The time of defrosting keeps for more than 10 minutes. (5) Indoor exchanger overheat protection When Indoor exchanger Temperature (IPT) is higher than 55 , unit comes into indoor exchanger
7
Air Conditioner Service Manual
overheat protection. The compressor drops its frequency toward to F1 level until IPT52 If IPT52 and keep for 5 minutes, control system doesn't limit running frequency. If IPT>62, control system shut down compressor, and recover while IPT drop less than 50. 6. "SLEEP" mode
When the SLEEP button is pressed, the AC operates as following: z The indoor fan speed is set at low speed, the power lamp and the sleep lamp is on, the
display of temperature will close after 5 minutes. z When selecting COOLING/DRY operation with SLEEP mode, the set temperature will be
raised by 1 1 hour later and by 2 2 hour later. z When selecting HEATING operation with SLEEP mode, the set temperature will be dropped by
11 hour later and 2 2 hours later. z After the System operates in SLEEP mode for 8 hours, it will stop automatically. 7. EMERGENCY Operation
When the EMERGENCY Operation switch is pressed one time, COOLING mode is selected and if the EMERGENCY Operation switch press again within 3s, HEATING mode selected, while press once again, the unit will switch off.
When the remote controller missing, failed or the batteries run down, press the EMERGENCY Operation switch on front of the indoor unit for function test. NOTE: Do not press the EMERGEMCY Operation switch during normal operation. 8. AUTO-RESTART Function (Option) While air conditioner is operating in one mode, all of its operation data, such as working mode, preset temperature etc. would be memorized into IC by main PCB. If power supply cut off due to reasons and recover again, the AUTO-RESTART function will set synchronously and the air conditioner would work at the same mode as before.
Auto-restart Pre-setting (optional):
If Auto-restart function is needed, follow the steps below to activate this function: 1) Pulling the air-con's plug out of socket. 2) Pressing and holding the Emergency button (ON/OFF) on the indoor, then insert the plug
into the socket again. 3) Keep pressing the Emergency button for more than 10 seconds until three short beeps
heard, the Auto-restart function been activated. 9. Protection and Failure Display
z When protection display is available, controller will show error code, digital LED shows error code and setting temperature by turns.
z If there is more than one failure, it will show error codes according to the error list sequence. z To insure the signal communication of indoor and outdoor unit, any failure code relates to
outdoor unit will remain display for 2 minutes maximum after it's recovered. z Among all the failure codes, sensor failure can be recovery automatically once it comes normal.
8
Air Conditioner Service Manual
z Error list
Failure Type
Indoor and outdoor communication failure Outdoor communication failure Indoor room temperature sensor (IRT) Indoor coil temperature sensor (IPT) Outdoor coil temperature sensor (OPT)
System abnormity Model configuration wrong Indoor fan motor fault Outdoor temperature sensor Exhaust temp. sensor IPM drive and module fault Outdoor fan motor fault (DC motor) Current sensor fault Indoor unit EEPROM fault
Temp. switch fault ( on top of the compressor)
Voltage sensor fault
LED Code RUNTIMER both winking RUNTIMER both winking
RUN-1 time/8s RUN-2 times /8s RUN-3 times /8s RUN-4 times /8s RUN-5 times /8s RUN-6 times /8s RUN-7 times /8s RUN-8 times /8s RUN-9 times /8s
RUN-10 times /8s RUN 11times /8s
RUN-12 times /8s RUN-13 times /8s
Digital LED Code E0 EC E1 E2 E3 E4 E5 E6 E7 E8 E9
EF EA EE EP
RUN-14 times /8s
EU
z Protection display code list: Protection Type
Overvoltage /lower voltage protection Overcurrent protection Exhaust over temperature protection Too cool protection in cooling mode
Overheat protection in cooling mode
Overheat protection in heating mode Outdoor over temperature / lower temperature protection Drive protection (software control ) Module protection (hardware control)
Function Indicator (flash) RUN: Blink; TIMER: 1 blink /8 sec RUN: Blink; TIMER: 2 blink /8 sec RUN: Blink; TIMER: 4 blink /8 sec RUN: Bright; TIMER: 5 blink /8 sec RUN: Bright; TIMER: 6 blink /8 sec RUN: Bright; TIMER: 7 blink /8 sec
RUN: Bright; TIMER: 8 blink /8 sec
RUN: Blink; TIMER: 9 blink /8 sec RUN: Blink; TIMER: 10 blink /8 sec
Digital LED Code P1 P2 P4 P5 P6 P7 P8
P9 P0
z Outdoor failure display There is a LED on outdoor power board, it blinks 1s ON and 1s OFF while compressor standby and it always light (ON) while compressor running; If there is failure happened on ODU,The indicator (LED) alerts the fault in a cycle as such that it is bright for 0.5 seconds, dark for 0.5 seconds, blinks "n" times and then dark for 3 seconds. For details as table below:
9
Air Conditioner Service Manual
Display on outdoor power source board:
blink time (n)
Failure
1
IPM protection
2
Over voltage /lower voltage
3
Overcurrent
4
Exhaust over temperature protection
5
Outdoor coil over temperature protection
6
Drive fault and protection (V1VP1)
7
Communication fault with indoor unit
8
Compressor overheat fault (compressor top switch)
9
Short-circuit / open-circuit fault of outdoor temperature sensor
Short circuit / open-circuit fault of outdoor heat exchanger temperature
10
sensor
11
Short-circuit / open-circuit fault of exhaust temperature sensor
12
Voltage sensor fault
13
Current sensor fault
14
IPM fault
15
Communication fault between power source board and IPM
16
No feedback from DC fan motor(outdoor unit)
17
Defrost state
10
Air Conditioner Service Manual
5. Wiring diagram
Mode: MGTC0913E-20 /MGTC0913C-20
INDOOR UNIT:
OUTDOOR UNIT
11
Air Conditioner Service Manual
Mode:MGTC0923E-20 /MGTC0923C-20
INDOOR UNIT
OUTDOOR UNIT
12
Air Conditioner Service Manual
MZ·: MGTC1213E-20 /MGTC1213C-20
INDOOR UNIT
OUTDOOR UNIT
13
Air Conditioner Service Manual
MODEL: MGTC1223E-20 /MGTC1223C-20 ,1'22581,7
287'22581,7
14
$LU&RQGLWLRQHU6HUYLFH0DQXDO
MODEL: MGTC1823E-20 /MGTC1823C-20MGTC2423E-20 /MGTC2423C-20, MGTC3623E-17 /MGTC3623C-17
,1'22581,7
287'22581,7
15
Air Conditioner Service Manual
6. Explosion view and parts
Indoor Unit- G4BMV00000 KFR-26G/YXABp(E1/6)(BMV00)
No.
Part No.
Part Name
Q'ty
Remark
1
Front Panel
1
2
Air Filter
2
3
Face Frame
1
4
Electrical Box Cover
1
5
Display PCB
1
6
Display PCB Box
1
7
Evaporator
1
8
Screw Cover
2
9
Cross Fan
1
10
Bearing Mount
1
11
Indoor Motor
1
12
In And Out Pipe Fixer
1
13
Indoor Motor Cover
1
14
Electrical Box
1
15
Main PCB
1
16
Transformer
1
17
Cable Clamp
1
18
Vane Motor 1
1
Vane Motor 2
1
19
Base
1
20
Vertical Vane Assembly
2
21
Vane
1
22
Installation Plate
1
23
Indoor Sensor Assembly
1 Not shown in Explosion
24
Remote Controller
1
view
25
wifi
1
26
Drainage Hose
1
27
Indoor Carton
1
28
Left Foaming
1
29
Right Foaming
1
16
Air Conditioner Service Manual Outdoor Unit- G5BBW00000 KFR-26W/YXABp(E1/6)(BBW00)
7
6
5
4
3
2
1
8 24
23 9
22 21 20 19
18
10
11
17
12
13
14 15
16
No.
Part No.
Part Name
Q'ty
Remark
1
Grille
1 Optional
2
Top Cover
1
3
Condenser
1
4
Outdoor Motor Supporter
1
5
Outdoor Motor
1
6
Propeller Fan
1
7
Left grille supporter
1
8
Front Plate
1
9
Fan Guard
1
10
Compressor
1
11
4-way Valve
1
12
4-way Valve Assembly
1
13
Base
1
14
Right Plate
1
15
Two-way Valve
1
16
Valve Supporter
1
17
Three-way Valve
1
18
Electrical Box Cover
1
19
Terminal
1
20
Cable clamp1
1
21
Outdoor PCB Assembly
1
22
Inductor
1
23
Capillary Assembly
1
24
Partition plate
1
25
Pipe Temp. sensor and outdoor Temp. sensor
1
26
Discharge Temp. sensor
1
27 28 29
Compressor Capacitor Capacitor Strip Base carton
1 1
Not shown in explosion view
1
30
Cabinet carton
1
31
Base foaming
1
32
Cover foaming
1
17
Indoor Unit- MGTC0923E-20
Air Conditioner Service Manual
No.
Part No.
Part Name
1 41106-003591
Front Panel
2 42008-000039
Air Filter
3 41106-002375
Face Frame
4 41211-000077
Electrical Box Cover
5 31102-000084
Display PCB
6 42003-000001
Display PCB Box
7 92011-004784
Evaporator
8 41108-000066
Screw Cover
9 42004-000001
Cross Fan
10 42007-000001
Bearing Mount
11 22001-000267_UM Indoor Motor
12 41101-000242
In And Out Pipe Fixer
13 42003-000051
Indoor Motor Cover
14 41105-000134
Electrical Box
15 31101-000247_UM Main PCB
16 NO
Transformer
17 42001-000103
Cable Clamp
18 22001-000313
Vane Motor 1
19 41102-000091
Base
20 41101-000082
Vertical Vane Assembly
21 41103-000102
Vane
22 41109-000041
Installation Plate
23 10104-100014
Indoor Sensor Assembly
24 22013-000946
Remote Controller
25 32001-000057
Wifi
26 A1101-007281 27 41110-000217 28 41110-000262
Indoor Carton Left Foaming Right Foaming
Q'ty
Remark
1
2
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1 Not shown in Explosion
1
view
1
1 1 1
18
Air Conditioner Service Manual
Outdoor Unit- MGTC0923C-20
7
6
5
4
3
2
1
8 24
23 9
22 21 20 19
10
11
18
17
12
13
14 15
16
No.
Part No.
Part Name
1
42011-000184
Grille
2
41207-000029
Top cover
3
92011-000777
Condenser
4
41203-000054
Outdoor motor supporter
5
22001-000049_UM Outdoor motor
6
42004-000107
Propeller fan
7
41205-000121
Left grille supporter
8
41206-000052
Front plate
9
42011-000038
Fan guard
10 92014-000142
Compressor and accessories
11 92008-000209
4-way valve
12 92007-000969_UM 4-way valve assembly
13 41202-000216
Base
14 41205-000083
Right plate
15 92007-001050
Two-way valve
16 41204-000018
Valve supporter
17 92007-001041_UM Three-way valve
18 41201-000044
Eelectronic Box Cover
19 42001-000036
Cable clamp
20 11304-100045_UM Terminal
21 31201-000988_UM Outdoor PCB Assembly
22 22011-000002_UM Inductor
23 92007-002083
Capillary assembly
24 41208-000141
Partition plate
25 10104-100047
Pipe Temp. sensor and outdoor Temp. sensor
26 10104-100036
Discharge Temp. sensor
27 41204-000051
Valve cover
28 A2005-000530
Base carton
29 A1201-007955
Cabinet carton
30 A1202-000039
Base foaming
31 41213-000030
Cover foaming
Q'ty
Remark
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Not shown in explosion
1
view
1
1
1
1
1
1
19
Indoor Unit-MGTC1213E-20
Air Conditioner Service Manual
No.
Part No.
1 41106-003591
2 42008-000039
3 41106-002375
4 41211-000077
5 31102-000084
6 42003-000001
7 92011-004784
8 41108-000066
9 42004-000001
10 42007-000001
11 22001-000307_UN
12 41101-000242
13 42003-000051
14 41105-000134
15 31101-000272_UN
16 NO
17 42001-000103
18 22001-000313
19 41102-000091
20 41101-000082
21 41103-000102
22 41109-000041
23 10104-100014
24 22013-000026
25 32001-000057
26 42009-000011 27 A1101-007058 28 41110-000217 29 41110-000262
Part Name
Front Panel Air Filter Face Frame Electrical Box Cover Display PCB Display PCB Box Evaporator Screw Cover Cross Fan Bearing Mount Indoor Motor In And Out Pipe Fixer Indoor Motor Cover Electrical Box Main PCB Transformer Cable Clamp Vane Motor 1 Base Vertical Vane Assembly Vane Installation Plate Indoor Sensor Assembly Remote Controller wifi Drainage Hose Indoor Carton Left Foaming Right Foaming
Q'ty
Remark
1
2
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1 Not shown in Explosion
1
view
1
1 1 1 1
20
Air Conditioner Service Manual
Outdoor Unit- MGTC1213C-20
8
7
6
5
4
3
2
1
24 23 9
22
10
11
12
13
14
15
16
No.
Part No.
Part Name
1
42011-000186
Grille
2
41207-000040
Top cover
3
92011-004797
Condenser
4
41203-000051
Outdoor motor supporter
5
22001-000049_UN Outdoor motor
6
42004-000106
Propeller fan
7
41205-000120
Left grille supporter
8
41206-000059
Front plate
9
42011-000041
Fan guard
10 92007-002134
Capillary assembly
11 92014-000142
Compressor
12 92006-000507
Discharge Pipe
13 92006-001664
Suction Pipe
14 41202-000218
Base
15 92007-001050
Two-way valve
16 41204-000018
Valve supporter
17 92007-001041
Three-way valve
18 41205-000091
Right plate
19 41201-000044
Electrical box cover
20 42001-000036
Cable clamp
21 11304-100046_UN Terminal
22 31201-001009_UN Outdoor PCB assembly
23 22011-000011_UN Inductor
24 41208-000147
Partition plate
25 10104-100033
Pipe Temp. sensor and outdoor Temp. sensor
26 10104-100036
Discharge Temp. sensor
27 42001-000030
Capacitor Strip
28 22003-000045_UN Compressor Capacitor
29 A1201-007900
Cabinet Carton
30 A2005-000536
Base carton
31 A1202-000041
Base foaming
30 41213-000032
Cover foaming
21 20
17 18
19
Q'ty
Remark
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Not shown in explosion view
1
1
1
1
1
1
1
21
Indoor Unit- MGTC1223E-20
Air Conditioner Service Manual
No.
Part No.
1 41106-003591
2 42008-000039
3 41106-002375
4 41211-000077
5 31102-000084
6 42003-000001
7 92011-004784
8 41108-000066
9 42004-000001
10 42007-000001
11 22001-000267
12 41101-000242
13 42003-000051
14 41105-000134
15 31101-000261
16 NO
17 42001-000103
18 22001-000313
19 41102-000091
20 41101-000082
21 41103-000102
22 41109-000041
23 10104-100014
24 22013-000946
25 32001-000047
26 42009-000011 27 A1101-008531 28 41110-000217 29 41110-000262
Part Name
Front Panel Air Filter Face Frame Electrical Box Cover Display PCB Display PCB Box Evaporator Screw Cover Cross Fan Bearing Mount Indoor Motor In And Out Pipe Fixer Indoor Motor Cover Electrical Box Main PCB Transformer Cable Clamp Vane Motor 1 Base Vertical Vane Assembly Vane Installation Plate Indoor Sensor Assembly Remote Controller WIFI Drainage Hose Indoor Carton Left Foaming Right Foaming
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22
Air Conditioner Service Manual
Outdoor Unit- MGTC1223C-20
8
7
6
5
4
3
2
1
24 23 9
22
21 20
10
11
12
13
14
15
16
17 18 19
No.
Part No.
1
42011-000183
2
41207-000029
3
4
41203-000053
5
22001-000049
6
42004-000107
7
41205-000121
8
41206-000052
9
42011-000038
10 92007-002134
11 92014-000142
12 92006-000478
13 92006-005363
14 41202-000177
15 92007-001050
16 41204-000018
17 92007-001041
18 41205-000083
19 41201-000044
20 42001-000036
21 11304-100045
22 31201-001063
23 22011-000002
24 41208-000141
25
10104-100047
26 10104-100036 27 A1201-009174 28 A2005-000530 29 A1202-000039 30 41213-000030
Part Name Grille Top Cover Condenser Outdoor Motor Supporter Outdoor Motor Propeller Fan Left Grille Supporter Front Plate Fan Guard Capillary Assembly Compressor Discharge pipe Suction pipe Base Two-way Valve Valve Supporter Three-way Valve
Right Plate Electrical Box Cover Cable Clamp terminal Outdoor PCB assembly Inductor Partition plate Pipe Temp. sensor and outdoor Temp. sensor Discharge Temp. sensor Cabinet Carton Base carton Base foaming Cover foaming
Q'ty
Remark
1
Optional
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
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1
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1 1 1 1 1
23
Indoor Unit- MGTC1823E-20
Air Conditioner Service Manual
No.
Part No.
1 41106-002202
2 42008-000001
3 41106-002351
4 41211-000079
5 31102-000084
6 42003-000001
7 92011-004728
8 41108-000066
9 42004-000002
10 42007-000001
11 22001-000257
12 41101-000224
13 42003-000045
14 41105-000134
15 31101-000273
16 NO
17 42001-000103
18 22001-000321
19 41102-000076
20 41101-000042
21 41103-000142
22 41109-000019
23 10104-100014
24 22013-000946
25 42009-000011
26 32001-000033
27 81102-002993
28 A2006-000070
29 A2006-000068
30 42005-000069
Part Name Front Panel Air Filter Face Frame Electrical Box Cover Display PCB Display PCB Box Evaporator Screw Cover Cross Fan Bearing Mount Indoor Motor In And Out Pipe Fixer Indoor Motor Cover Electrical Box Main PCB Transformer Cable Clamp Vane Motor 1 Base Vertical Vane Assembly Vane Installation Plate Indoor Sensor Assembly Remote Controller Drainage Hose WIFI Indoor Carton Left Foaming Right Foaming Middle support
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24
Air Conditioner Service Manual
Outdoor Unit-MGTC1823C-20
8
7
6
5
4
3
2
1
24 23 9
22
10
11
No.
Part No.
1
42011-000169
2
41207-000033
3
92011-000616
4
41203-000052
5
22001-000096
6
42004-000104
7
41205-000119
8
41206-000057
9
42011-000040
10 92007-002228
11 92014-000318
12 92006-000489
13 92006-001654
14 41202-000156
15 92007-001051
16 41204-000018
17 92007-001041
18 41205-000090
19 41201-000044
20 42001-000036
21 11304-100045
22 31201-001025
23 22011-000014
24 41208-000154
25 10104-100038
26 10104-100036
27 A1201-007956 28 A2005-000532 29 A1202-000037 30 41213-000031
21 20
12
13
14
15
16
17 18
19
Part Name Grille Top cover Condenser Outdoor motor supporter Outdoor motor Propeller fan Left grille supporter Front plate Fan guard Capillary assembly Compressor Discharge Pipe Suction Pipe Base Two-way valve Valve supporter Three-way valve Right plate Electrical box cover Cable clamp Terminal Outdoor PCB assembly Inductor Partition plate Pipe Temp. sensor and outdoor Temp. sensor
Discharge Temp. sensor
Cabinet Carton Base carton Base foaming Cover foaming
Q'ty
Remark
1
1
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1
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1
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view
1
1 1 1 1
25
Indoor Unit- MGTC2423E-20
Air Conditioner Service Manual
1 2 3 4 5
6 7 8 9 10 11 12
24 23 22 21 20 19 18
17 16 15 14 13
No. Part No. 1 41109-000028 2 41199-002746 3 42004-000042 4 42007-000001 5 92011-004785 6 41103-000064 7 41106-002275 8 41108-000066 9 31102-000085 10 42003-000001 11 42008-000041 12 41106-002203 13 41103-000317 14 41103-000312 15 42009-000004 16 42001-000103 17 22001-000357 18 31101-000256 19 41108-000006 20 22001-000240 21 41105-000139 22 41211-000080 23 NO 24 10104-100022 25 22013-000946
26 32001-000033
27 A1101-007184 28 A2004-000284 29 A2004-000332 30 A1101-005787
Part Name Installation Plate Base Cross Fan Bearing Mount Evaporator Water Drainage Assembly Face Frame Screw Cover Display PCB Display PCB Box Air Filter Front Panel Up Vane Down Vane Drainage Hose Cable Clamp Vane Motor Main PCB Indoor Motor Cover Indoor Motor Electrical Box Electrical Box Cover Transformer Indoor Sensor Assembly Remote Controller
WIFI
Indoor Carton Left Foaming Right Foaming Middle Foaming Supporter
Q'ty
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1
1
1
1
1
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1
3
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26
Air Conditioner Service Manual
Outdoor UnitMGTC2423C-20
8
7
6
5
4
3
2
1
24 23 9
22
10
11
12
13
14
15
16
No.
Part No.
1
42011-000188
2
41207-000028
3
92011-004798
4
41203-000049
5
22001-000110
6
42004-000105
7
41205-000117
8
41206-000058
9
42011-000039
10 92007-002133
11 92014-000318
12 92006-000381
13 92007-005313
14 41202-000186
15 92007-001052
16 41204-000018
17 92007-001042
18 41205-000088
19 41201-000044
20 42001-000036
21 11304-100045
22 31201-001013
23 22011-000004
24 41208-000155
25 10104-100030
26 10104-100037
27 A1201-007784 28 A2005-000521 29 A1202-000030 30 41110-000204
Part Name Grille Top cover Condenser Outdoor motor supporter Outdoor motor Propeller fan Left grille supporter Front plate Fan guard Capillary assembly Compressor Discharge Pipe Suction Pipe Base Two-way valve Valve supporter Three-way valve Right plate Electrical box cover Cable clamp Terminal Outdoor PCB assembly Inductor Partition plate Pipe Temp. sensor and outdoor Temp. sensor
Discharge Temp. sensor
Cabinet Carton Base carton Base foaming Cover foaming
21 20
17 18
19
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1
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27
Indoor Unit- MGTC3623E-17
Air Conditioner Service Manual
1 2 3 4 5
6 7 8 9 10 11 12
24 23 22 21 20 19 18
17 16 15 14 13
No. Part No. 1 41109-000028 2 41199-002746 3 42004-000042 4 42007-000001 5 92011-004396 6 41103-000064 7 41106-002275 8 41108-000066 9 31102-000085 10 42003-000001 11 42008-000041 12 41106-002203 13 41103-000317 14 41103-000312 15 42009-000004 16 42001-000103 17 22001-000357 18 31101-000267 19 41108-000006 20 22001-000240 21 41105-000139 22 41211-000080 23 NO 24 10104-100022 25 22013-000946
26 32001-000057
27 A1101-007286 28 A2004-000284 29 A2004-000332 30 A1103-000012
Part Name Installation Plate Base Cross Fan Bearing Mount Evaporator Water Drainage Assembly Face Frame Screw Cover Display PCB Display PCB Box Air Filter Front Panel Up Vane Down Vane Drainage Hose Cable Clamp Vane Motor Main PCB Indoor Motor Cover Indoor Motor Electrical Box Electrical Box Cover Transformer Indoor Sensor Assembly Remote Controller
WIFI
Indoor Carton Left Foaming Right Foaming Middle Foaming Supporter
Q'ty
Remark
1
1
1
1
1
1
1
3
1
1
2
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28
Air Conditioner Service Manual
Outdoor Unit- MGTC3623C-17
7
6
5
4
3
2
1
8 24
23 9
22 21 20 19
10
11
12
No.
Part No.
Part Name
1
42011-000166 Back Grille
2
41207-000016 Top cover
3
92011-004586 Condenser
4
41203-000030 Outdoor motor supporter
5
22001-000120 Outdoor motor
6
42004-000091 Propeller fan
7
41205-000125 Left grille supporter
8
41206-000046 Front plate
9
42011-000031 Fan guard
10 92014-000300 Compressor 11 92008-000206 4-way Valve 12 92007-000984 4-way Valve Assembly 13 41202-000229 base
14 41205-000064 Right plate 15 92008-000047 Two-way valve 16 41204-000011 Valve supporter 17 92008-000119 Three-way valve
18 41201-000043 Electrical box cover
19
42001-000036 Cable clamp
42001-000038 Cable clamp
20 11304-100045 Terminal
21 31201-000981 Outdoor PCB assembly 22 22011-000004 Inductor 23 92007-002096 Capillary Assembly 24 41208-000176 Partition plate
25
10104-100039
Pipe Temp. sensor and outdoor Temp. sensor
26 10104-100037 Discharge Temp. sensor
27 41204-000047 Valve cover 28 A2005-000509 Base carton 29 A1201-007893 Cabinet carton
30 A1202-000022 Base foaming 31 41213-000017 Cover foaming
18
13
14 15
17 16
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29
Air Conditioner Service Manual
7. Precaution
7.1 SAFETY RULES AND RECOMMENDATIONS FOR THE INSTALLATION z Read this guide before installing and using the appliance. z During the installation of the indoor and outdoor units the access to the working area should be
forbidden to children. Unforeseeable accidents could happen. z Make sure that the base of the outdoor unit is firmly fixed. z Check that air cannot enter the refrigerant system and check for refrigerant leaks when moving the air conditioner. z Check that air cannot enter the refrigerant system and check for refrigerant leaks when moving the air conditioner. z The ratings of the fuse installed in the built in-control unit are T 5A / 250V. z The user must protect the indoor unit with a fuse of suitable capacity for the maximum input current or with another overload protection device. z Ensure that the mains voltage corresponds to that stamped on the rating plate. Keep the switch or power plug clean. Insert the power plug correctly and firmly into the socket, thereby avoiding the risk of electric shock or fire due to insufficient contact. z Check that the socket is suitable for the plug, otherwise have the socket changed. z The appliance must be fitted with means for disconnection from the supply mains having a contact separation in all poles that provide full disconnection under over voltage category III conditions, and these means must be incorporated in the fixed wiring in accordance with the wiring rules. z The air conditioner must be installed by professional or qualified persons. Do not install the appliance at a distance of less than 50 cm from inflammable substances (alcohol, etc.) Or from pressurized containers (e.g. spray cans). z If the appliance is used in areas without the possibility of ventilation, precautions must be taken to prevent any leaks of refrigerant gas from remaining in the environment and creating a danger of fire. z The packaging materials are recyclable and should be disposed of in the separate waste bins .Take the air conditioner at the end of its useful life to a special waste collection center for disposal. z Only use the air conditioner as instructed in this booklet. These instructions are not intended to cover every possible condition and situation. As with any electrical household appliance, common sense and caution are therefore always recommended for installation, operation and maintenance. z The appliance must be installed in accordance with applicable national regulations. z Before accessing the terminals, all the power circuits must be disconnected from the power supply. z The appliance shall be installed in accordance with national wiring regulations. z This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or
30
Air Conditioner Service Manual
instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision. 7.2 SAFETY RULES AND RECOMMENDATIONS FOR THE USER z Do not try to install the conditioner alone; always contact specialized technical personnel. Cleaning and maintenance must be carried out by specialized technical personnel. In any case disconnect the appliance from the mains electricity supply before carrying out any cleaning or maintenance. z Ensure that the mains voltage corresponds to that stamped on the rating plate. Keep the switch or power plug clean. Insert the power plug correctly and firmly into the socket, thereby avoiding the risk of electric shock or fire due to insufficient contact. z Do not pull out the plug to switch off the appliance when it is in operation, since this could create a spark and cause a fire, etc. z This appliance has been made for air conditioning domestic environments and must not be used for any other purpose, such as for drying clothes, cooling food, etc. z The packaging materials are recyclable and should be disposed of in the separate waste bins. Take the air conditioner at the end of its useful life to a special waste collection center for disposal. z Always use the appliance with the air filter mounted. The use of the conditioner without air filter could cause an excessive accumulation of dust or waste on the inner parts of the device with possible subsequent failures. z The user is responsible for having the appliance installed by a qualified technician, who must check that it is earthed in accordance with current legislation and insert a thermomagnetic circuit breaker. z The batteries in remote controller must be recycled or disposed of properly. Disposal of Scrap Batteries
--- Please discard the batteries as sorted municipal waste at the accessible collection point. z Never remain directly exposed to the flow of cold air for a long time. The direct and prolonged exposition
to cold air could be dangerous for your health .Particular care should be taken in the rooms where there are children, old or sick people. z If the appliance gives off smoke or there is a smell of burning, immediately cut off the power supply and contact the Service Centre. z The prolonged use of the device in such conditions could cause fire or electrocution. z Have repairs carried out only by an authoritative Service Centre of the manufacturer. Incorrect repair could expose the user to the risk of electric shock, etc. z Unhook the automatic switch if you foresee not to use the device for a long time. The airflow direction must be properly adjusted. z The flaps must be directed downwards in the heating mode and upwards in the cooling mode. z Only use the air conditioner as instructed in this booklet. These instructions are not in ended to cover every possible condition and situation. As with any electrical household appliance, common sense and caution are therefore always recommended for installation, operation and maintenance.
31
Air Conditioner Service Manual
z Ensure that the appliance is disconnected from the power supply when it will remain inoperative for a long period and before carrying out any cleaning or maintenance.
z Selecting the most suitable temperature can prevent damage to the appliance. 7.3 SAFETY RULES AND PROHIBITIONS z Do not bend, tug or compress the power cord since this could damage it. Electrical shocks or fire are
probably due to a damaged power cord. Specialized technical personnel only must replace a damaged power cord. z Do not use extensions or gang modules. z Do not touch the appliance when barefoot or parts of the body are wet or damp. z Do not obstruct the air inlet or outlet of the indoor or the outdoor unit. The obstruction of these openings causes a reduction in the operative efficiency of the conditioner with possible consequent failures or damages. z In no way alter the characteristics of the appliance. z Do not install the appliance in environments where the air could contain gas, oil or sulphur or near sources of heat. z This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. z Do not climb onto or place any heavy or hot objects on top of the appliance. z Do not leave windows or doors open for long when the air conditioner is operating. z Do not direct the airflow onto plants or animals. z A long direct exposition to the flow of cold air of the conditioner could have negative effects on plants and animals. z Do not put the conditioner in contact with water. The electrical insulation could be damaged and thus causing electrocution. z Do not climb onto or place any objects on the outdoor unit z Never insert a stick or similar object into the appliance. It could cause injury. z Children should be supervised to ensure that they do not play with the appliance. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.
32
Air Conditioner Service Manual
8.Names of parts
1 2-3 4
INDOOR UNIT
6
5
7
Indoor unit
No.
Name
1
Front panel
2
Air filter
3
Special filter(option)
4
Display PCB
5
Vertical vane
6
Horizontal vane
7
Remote controller
8 OUTD OOR UNIT
Outdoor unit
No.
Name
8 Air outlet grille
9 Electronic box cover 9
10 2-way valve
11 3-way valve 10
11
33
Air Conditioner Service Manual
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Air Conditioner Service Manual
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35
Air Conditioner Service Manual
z Install the indoor unit at a height of at least 2.5m from the ground.
To install, proceed as follows:
9.2.1Installation of the mounting plate.
1) By using a level, put the mounting plate in a perfect square position vertically and horizontally.
2) Drill 32mm deep holes in the wall to fix the plate.
3) Insert the plastic anchors into the hole.
4) Fix the mounting plate by using the provided tapping screws.
5) Check that the mounting plate is correctly fixed.
Note: The shape of the mounting plate may be different from the one above, but installation method is similar.
9.2.2Drilling a hole in the wall for the piping
1) Decide where to drill the hole in the wall for the piping (if necessary) according to the position of the mounting plate
2) Install a flexible flange through the hole in the wall to keep the latter intact and clean.
The hole must slope downwards towards the exterior. Note: Keep the drain pipe down towards the direction of the wall hole, otherwise leakage may occur.
9.2.3Electrical connections---Indoor unit
1).Lift the front panel.
2).Take off the cover as indicated in the picture (by removing a screw or by breaking the hooks).
3).For the electrical connections, see the circuit diagram on the right part of the unit under the front panel. 4).Connect the cable wires to the screw terminals
by following the numbering, Use wire size suitable to the electric power input (see name plate on the unit) and according to all current national safety code requirements. 5).The cable connecting the outdoor and indoor units must be suitable for outdoor use. 6).The plug must be accessible also after the appliance has been installed so that it can be pulled out if necessary.
Indoors
Out doors 5mm
Front panel Wiring diagram Terminal block cover
36
Air Conditioner Service Manual
7).An efficient earth connection must be ensured. 8).If the power cable is damaged, it must be
replaced by an authorized Service Centre.
9.2.4 Refrigerant piping connection
The piping can be run in the 3 directions indicated by numbers in the picture. When the piping is run in direction 1 or 3, cut a notch along the groove on the side of the indoor unit with a cutter.
Run the piping in the direction of the wall hole and bind the copper pipes, the drain pipe and the power cables together with the tape with the drain pipe at the bottom, so that water can flow freely. 9.2.5Connecting the pipes.
z Do not remove the cap from the pipe until connecting it, to avoid dampness or dirt from entering.
z If the pipe is bent or pulled too often, it will become stiff. Do not bend the pipe more than three times at one point.
z When extending the rolled pipe, straighten the pipe by unwinding it gently as shown in the picture.
9.2.6Connections to the indoor unit
1).Remove the indoor unit pipe cap (check that there is no debris inside).
2).Insert the fare nut and create a flange at the extreme end of the connection pipe.
3).Tighten the connections by using two wrenches working in opposite directions.
9.2.7 Indoor unit condensed water drainage The indoor unit condensed water drainage is fundamental for the success of the installation. 1).Place the drain hose below the piping, taking care not to create siphons.
2).The drain hose must slant downwards to aid drainage.
3).Do not bend the drain hose or leave it protruding or twisted and do not put the end of it in water. If an extension is connected to the drain hose, ensure that it is lagged when it passes into the indoor unit.
1 23
Shape the connection pipe
YES
NO
Extending the rolled pipe
torque wrench
YES
NO
NO
37
Air Conditioner Service Manual
4).If the piping is installed to the right, the pipes, power cable and drain hose must be lagged and secured onto the rear of the unit with a pipe connection.
z Insert the pipe connection into the relative slot.
z Press to join the pipe connection to the base.
9.2.8Electronic connections
1. Take the cover away.
2. Connect the cable wires to the terminal board using the same numbering as in the indoor unit.
3. For the electrical connections, see the wiring diagram on the back of the cover
4. Fasten the cables with a cable-clamp.
5. An efficient earth connection must be ensured.
6. Replace the covers.
9.2.9Connecting the pipe
Screw the flare nuts to the outdoor unit coupling with the same tightening procedures described for the indoor unit.
Note: If the tightening torque is not sufficient, there will probably be some leakage. With excessive tightening torque there will also be some leakage, as the flange could be damaged.
9.2.10 Bleeding
Air and humidity left inside the refrigerant circuit can cause compressor malfunction. After having connected the indoor and outdoor units, bleed the air and humidity from the refrigerant circuit by using a vacuum pump. The air and humidity left inside the refrigerant circulation can cause compressor malfunction. After having connected the indoor and outdoor units, bleed the air and humidity from the refrigerant circulation using a vacuum pump.
Wiring diagram on the back of the cover
Screw
Remove the upper cover
Outdoor unit
connection pipes
flare nuts liquid tap
gas tap
indoor unit
gas valve
Liquid valve tap
service port nut protection caps
s ervice port
vacuum pump
38
Air Conditioner Service Manual
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39
..
Air Conditioner Service Manual
&RQQHFWLRQRI2'83&%
..
To indoor unit
PC monitor
DRM-COM DRM1 DRM2 DRM3 COMP. top Temp protection
Suction Temp sensor
Outdoor ambient Temp sensor Out door coil Temp sensor Exhaust Temp. sensor
Expansion valve
Blue White Red
COMP.
CN7 LEV
CN2 CN1 CN12 CN3 (OHT) (OPTOAT) ORQ (OVT)
CN13
CN409 For programmed
wu v
P9
CN12-2
U405
IPM
P10-3(W) P10-2(V)
CN12-1 (DC fan motor
feedback)
CN407 For EEPROM programmed
Q403 IGBT
D412 )DVW UHFRYHU\ GLRGH
DN401 rectifier
P10-1(U) P 14 (L) P13 (L)
CN401 (485-COM)
P5-1P8 (VAL)
P2
(CAN-Blue)
C
P3
(S-Black)
P1 (ACL-Brown)
CN11
N CN410 L(OUTFAN)
P11-1P11-2
H
(HEAT)
P00 P01
Electric reactor
40
..
Air Conditioner Service Manual
To indoor unit
DRM-COM DRM1 DRM2 DRM3 COMP. top Temp protection
Suction Temp sensor
Outdoor ambient Temp sensor Out door coil Temp sensor Exhaust Temp. sensor
Expansion valve
Red White Blue
COMP.
CN409 For programmed
CN407 For EEPROM programmed
U603
IPM
Q403 IGBT
D412 )DVW UHFRYHU\ GLRGH
DN401 rectifier
CN7 LEV
CN2 CN1 CN12 CN3 (OHT)(OPTOAT ) ORQ (OVT)
CN13
P2 (ACN)
CN11 (HEAT)
CN L H
CN410 (OUTFAN)
P10-1(U) P10-2(V)
P9 (DCFAN)
P5-1P8
CN401
(VAL)
(485-COM)
P3 (S)
P1 (ACL)
P10-3(W) P14(L)
PC monitor
P00
P01 P13(L)
Electric reactor
&XUUHQWIORZ
Power supply
Ground Neutral
Live
Indoor unit PCB
live Neutral
Communication wire
Ground
U
V
Outdoor unit
compressor
PCB
W
Indoor unit
outdoor unit
41
1.5 Examples of repairing 1.5.1Display E1 or E2
Reasons:
Air Conditioner Service Manual
1) The sensor connection terminal loose or not plugged in.
Solution: Check the connecter of sensor and slot (CN6), if loose or not plugged in, please connect again.
2) Room temperature sensor (IRT) and Indoor pipe (coil) temperature sensor (IPT) damage (short or broken).
Solution: check the resistance of the sensor R (25) =5 N, if short or broken please replace it.
Fail
OK
3) The PCB fail. Solution: Replace the indoor main PCB.
1.5.2Display E6 Reasons:
1) The indoor motor connection terminal loose or not plugged in.
Solution: Check the connecter of indoor motor and slot (CN3) and (CN4), if loose or not plugged in, please connect again.
2) The indoor motor damage. Solution: Check and replace the motor.
42
Air Conditioner Service Manual
3) The indoor main PCB damage.
Solution: Replace the indoor main PCB. 1.5.3 Display E3, E7
Reasons:
1) Outdoor pipe temp sensor, outdoor temp sensor & exhaust temp sensor connection terminal loose or not plugged in.
Solution: Check the connecter of sensor and slot, if loose or not plugged in, please connect again.
2) Outdoor pipe temp sensor, outdoor temp sensor & exhaust temp sensor damage (short or broken). Solution: Check and replace the sensor.
Fail
OK
3) Outdoor PCB damage.
Solution: Check and replace the outdoor PCB. 1.5.4 Display E8
Reasons:
1) Outdoor discharge pipe temp sensor connection terminal loose or not plugged in.
43
Air Conditioner Service Manual
Solution: Check the connecter of sensor and slot, if loose or not plugged in, please connect again. 2) Outdoor pipe temp sensor damage.
Fail
OK
Solution: Check and replace the sensor. 3) Outdoor PCB damage.
Solution: Check and replace the outdoor PCB. 1.5.Display E0,E5
Reason: Indoor / outdoor communication damage. Solution: 1) Check if the indoor and outdoor connections are correct. The terminal L and N which connect to indoor
unit shall correspond to each other on indoor and outdoor units. Measure the voltage on outdoor terminal L and N (before display of E0 fault). If the voltage is ³´ please replace indoor main PCB.
1 N L
2) If the 1 & N which connect to indoor unit voltage is normal, measure the voltage between the outdoor terminal 1 and N. If the voltage change occurs between 0~24V (change pulse voltage), please replace RXWGRRUPCB.
1 N L
3) If the 1 & N which connect to indoor unit voltage is normal, measure the voltage between the outdoor terminal 1 and N. If the voltage change occurs between 0~12V( change pulse voltage), but there is no 24V, please replace the LQdoor PCB.
1 N L
4) If the 1 & N voltage is normal, measure the voltage between the outdoor terminal 1 and N. If the voltage has no change, firstly replace the indoor main PCB. If the fault remains unsolved, replace the outdoor PCB.
44
Air Conditioner Service Manual
1 N L
5) Communication fault if resistance or optical coupler broken, replace outdoor PCB. Communication circuit
6) Is there any burnt on PCB? If no, test the rectifier, FRD, IGBT etc. any component broken, replace PCB. Any of 2 pins should be no short circuit Any of 2 pins should be no short circuit
Any of 2 pins should be no short circuit
7) Test the DC voltage between DC+ and DC-. If the voltage is less than 50V approximately, please replace outdoor PCB.
DCDC+
1.5. Display EA Reason: Current sensor fault. Solution: 1) Check for refrigerant leakage, to find the leakage point and recharge the refrigerant. 2) Current sampling circuit broken on the outdoor PCB and replace outdoor PCB.
Current sampling circuit
1.5. Display E9first display P0 or P9 Reason: Outdoor PCB drive circuit damage.
41
Solution:
Air Conditioner Service Manual
Re-energize and check the protection code on display. Firstly display P0.
1) If this code is displayed when the compressor is started for several seconds or even not started, check
the compressor connection for correctness, if no insert wrong, replace outdoor PCB.
Compressor connection
2) Check if the outdoor module is tightly installed onto the radiating fins and if the silicone is applied evenly, fix the screws again if loose.
Fixing screw
Heat radiation problem easily happened while the screw is not fixed tightly.
3) Check the system pressure, recharge refrigerant if the pressure is low, and discharge some refrigerant if the pressure is too high. 4) Check the outdoor ventilation and if there is any obstruction that affects the normal radiating of the air
conditioner, and installation again. 5) If the above inspections are normal, but the fault remains unsolved, please replace the outdoor PCB.
Re-energize and check the protection code on display. Firstly display P9. a) Check the U,V, W connection, if is correctness or loose please connect again.
U, V, W connection
b) If this code is displayed when the compressor is started for several seconds or even not started, check the compressor connection for correctness, if no insert wrong, replace outdoor PCB.
1.5. Display EU. Reason: Voltage sensor damage. Solution: Please replace outdoor PCB.
Voltage sensor
1.5. Display EE Reason: EEPROM fault. Solution: Shut down power supply and reenergize it, if the fault remains there, check the EEPROM installation, if no problem, please replace outdoor PCB.
42
Air Conditioner Service Manual
EEPROM
1.5.Display CL Cause: Air filter duty, the unit operation Cumulative time 500 hours, the controller will confirmation the filter dirty and display CL. Solution: Clean the air filter then cut off the power and supply again.
1.6 MALFUNCTION (PARTS) CHECK METHOD
1.6.1 Procedure for determining defective outdoor unit IPM/compressor The following flow chart shows a procedure for locating the cause of a malfunction when the compressor does not start up and a DC overcurrent indication error occurs.
Use the remote operates the air conditioner
Compressor star up
Does indoor unit LED Yes display error code.
No Normal
P9
No Does compressor start up
Does the wire No Connects wire
connects right
again
Yes
No
Does low or high press valve opened
Yes Open
Yes No
Operates again after 3 Mins Yes
Replace the inverter PCB
Normal
Replace the compressor
P0
Does compressor start
Yes
Clean indoor or outdoor No Clean indoor heat exchange
heat exchange
and outdoor heat exchange
Does the wire connects right
Connects wire again
Add gas
Not enough
Normal
Check the refrigerant amount
Normal
Check the installation condition Normal Replace the inverter PCB
Installation again
43
1.6.2 DC Over Current Error
Error memory is recorded
Start
Air Conditioner Service Manual
Are valves (2-way or 3-war) close?
Yes Full open stop valves
Does compressor
Yes
rotates?
No
Does compressor
Yes
rotates more than
30 seconds?
No
Is IPM PWB floating
from the heat sink?
Check IPM lead wire (UVW)
Abnormal
Normal
Modify the connection of compressor lead wire on PWB
No
Check the AC power
supply voltage when compressor rotate.(rated voltage±10%)
Yes
Fix IPM PWB with screws
securely.
Check IPM short
circuit.
Normal
Abnormal Replace P WB.
Normal
Cooling mode?.
Yes
Check compressor
Abnormal
Normal
Modify compressor terminal marking
Replace PWB
Does compressor rotates?
No
Replace compressor
No
Check indoor exchange sensor and discharge sensor
Check outdoor exchange sensor and discharge sensor Abnormal
Normal
Modify or replace the sensor.
Normal
Abnormal
Modify or replace the sensor.
Check indoor heat exchange.
Check outdoor heat exchange
Abnormal
Normal
Clean indoor heat exchange
Abnormal
Clean outdoor heat exchange
Check the refrigerant amount
Check the discharge press
Check the installation condition
44
Air Conditioner Service Manual
1.6.3 E0,E5 Error
Start Display E0
Display E5
Replace inverter board and power supply board or outdoor PCB assembly
Shut off power and supply again and observe 10 Mins
Display E5
Display E0
Check the wire Not OK connections
OK
Connects the wire again
Check the terminal L and N voltage
If the voltage is Yes Replace indoor
0 V
PCB
No
Check the terminal N and 1 voltage
If the voltage Yes change occurs between 0~24V
Replace indoor PCB
If the voltage change Yes Replace power supply
occurs between
board or outdoor PCB
0~12V not 13~24V
assembly
If the voltage no change
Shut off power and supply again
Display E5 Replace inverter board
Display E0 first and then display E5 and keep
If the indicator on the outdoor PCB blink?
No
Check terminal L&N voltage
Normal
Yes Solve as E0
Abnormal Check wire connected and replace indoor PCB
Check the rectifier
Damage
bridge, fast recovery
diode (FRD) and IGBT
Replace PFC board or outdoor PCB assembly
Normal
Test the DC voltage between DC+ and DC-
If the voltage is approx. 300V
If the voltage is approx. zero
Replace PFC board or outdoor PCB assembly
Replace power supply board or outdoor PCB assembly
Replace indoor PCB, if unsolved replace power supply board or outdoor PCB assembly
If the problem cannot be solved by using the methods above
Replace the indoor main PCB, power source board, and PFC board or outdoor PCB assembly
42
Air Conditioner Service Manual
1.7 THERMISTOR TEMPERATURE CHARACTERISTICS
1. Indoor unit and outdoor exchange temperature and outside air temperature sensor temperature characteristics
TEMP. ()
Resistance (k Ohm)
Voltage of resistance
TEMP. Resistance
()
(k Ohm)
Voltage of resistance
TEMP. ()
Resistance (k Ohm)
Voltage of resistance
-30 -29 -28 -27 -26 -25 -24 -23 -22 -21 -20 -19 -18 -17 -16 -15 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
63.513 60.135 56.956 53.963 51.144 48.488 45.985 43.627 41.403 39.305 37.326 35.458 33.695 32.030 30.458 28.972 27.567 26.239 24.984 23.795 22.671 21.606 20.598 19.644 18.732 17.881 17.068 16.297 15.565 14.871 14.212 13.586 12.991 12.426 11.889 11.378 10.893 10.431
9.991 9.573 9.174 8.795 8.433 8.089 7.760
4.628 4.609 4.589 4.568 4.547 4.524 4.501 4.477 4.452 4.426 4.399 4.371 4.343 4.313 4.283 4.252 4.219 4.186 4.152 4.117 4.082 4.045 4.008 3.969 3.930 3.890 3.850 3.808 3.766 3.723 3.680 3.635 3.590 3.545 3.499 3.452 3.406 3.358 3.310 3.262 3.214 3.165 3.116 3.067 3.017
15
7.447
16
7.148
17
6.863
18
6.591
19
6.332
20
6.084
21
5.847
22
5.621
23
5.404
24
5.198
25
5.000
26
4.811
27
4.630
28
4.457
29
4.292
30
4.133
31
3.981
32
3.836
33
3.697
34
3.563
35
3.435
36
3.313
37
3.195
38
3.082
39
2.974
40
2.870
41
2.770
42
2.674
43
2.583
44
2.494
45
2.410
46
2.328
47
2.250
48
2.174
49
2.102
50
2.032
51
1.965
52
1.901
53
1.839
54
1.779
55
1.721
56
1.666
57
1.613
58
1.561
59
1.512
2.968
60
2.918
61
2.868
62
2.819
63
2.769
64
2.720
65
2.671
66
2.621
67
2.572
68
2.524
69
2.475
70
2.427
71
2.379
72
2.332
73
2.285
74
2.238
75
2.192
76
2.146
77
2.101
78
2.057
79
2.012
80
1.969
81
1.926
82
1.883
83
1.842
84
1.800
85
1.760
86
1.720
87
1.681
88
1.642
89
1.604
90
1.567
91
1.530
92
1.495
93
1.459
94
1.425
95
1.391
96
1.357
97
1.325
98
1.293
99
1.262
100
1.231
1.201
1.172
1.143
1.464 1.418 1.374 1.331 1.290 1.250 1.212 1.175 1.139 1.105 1.072 1.040 1.009 0.979 0.950 0.922 0.895 0.869 0.843 0.819 0.795 0.773 0.751 0.729 0.709 0.689 0.669 0.651 0.633 0.615 0.598 0.582 0.566 0.550 0.535 0.521 0.507 0.493 0.480 0.467 0.455
1.115 1.088 1.061 1.035 1.009 0.984 0.960 0.936 0.913 0.890 0.868 0.847 0.825 0.805 0.785 0.765 0.746 0.728 0.710 0.692 0.675 0.658 0.641 0.625 0.610 0.595 0.580 0.566 0.552 0.538 0.525 0.512 0.499 0.487 0.475 0.463 0.452 0.441 0.430 0.419 0.409
43
Resistance at 25: 5 k.
Air Conditioner Service Manual
TH1: indoor room temperature sensor and outside air temperature sensor TH2: indoor exchange temperature sensor and outside exchange temperature sensor
Before measuring resistance, disconnect connectors as shown above. 2. Outdoor unit sensor temperature characteristics
TEMP. R min
R(t)
R max TEMP. R min
R(t)
R max TEMP. R min
R(t)
R max
() (k Ohm) (k Ohm) (k Ohm) () (k Ohm) (k Ohm) (k Ohm) () (k Ohm) (k Ohm) (k Ohm)
-30
283.3
322.9
367.7
24
19.36 20.89
22.52
78
2.563
2.654
2.745
-29
267.4
304.4
346.3
25
18.55
20
21.54
79
2.481
2.567
2.654
-28
252.5
287.1
307.4
26
17.77
19.14
20.6
80
2.402
2.484
2.567
-27
238.5
270.9
307.4
27
17.03
18.32
19.7
81
2.327
2.404
2.483
-26
225.4
255.7
289.8
28
16.32
17.55
18.85
82
2.254
2.327
2.401
-25
213.1
241.4
273.3
29
15.65
16.81
18.04
83
2.183
2.253
2.323
-24
201.5
228
257.9
30
15
16.1
17.27
84
2.115
2.182
2.248
-23
190.6
215.5
243.4
31
14.39
15.43
16.54
85
2.05
2.113
2.176
-22
180.3
203.6
229.8
32
13.81
14.79
15.34
86
1.985
2.047
2.109
-21
170.7
192.5
217
33
13.25
14.18
15.17
87
1.922
1.983
2.045
-20
161.6
182.1
205
34
12.72
13.6
14.54
88
1.861
1.922
1.983
-19
153.1
172.3
193.7
35
12.21
13.05
13.93
89
1.802
1.862
1.923
-18
145
163.1
183.2
36
11.72
12.52
13.36
90
1.746
1.805
1.865
-17
137.5
154.4
173.2
37
11.26
12.01
12.81
91
1.692
1.75
1.809
-16
130.3
146.2
163.9
38
10.82
11.53
12.29
92
1.639
1.697
1.755
-15
123.6
138.5
155.1
39
10.29
11.07
11.78
93
1.589
1.646
1.703
-14
117.3
131.3
146.8
40
9.986
10.63
11.31
94
1.54
1.596
1.653
-13
111.3
124.4
139
41
9.6
10.21
10.85
95
1.493
1.549
1.604
-12
105.6
118
131.7
42
9.231
9.813
10.42
96
1.448
1.502
1.558
-11
100.3
111.9
124.7
43
8.878
9.43
10
97
1.404
1.458
1.512
-10
95.24
106.2
118.2
44
8.54
9.064
9.612
98
1.362
1.415
1.469
-9
90.49
100.8
112.1
45
8.217
8.714
9.233
99
1.321
1.373
1.426
-8
85.99
95.68
106.3
46
7.908
8.38
8.872 100
1.284
1.335
1.387
-7
81.75
90.86
100.8
47
7.612
8.06
8.526 101
1.245
1.296
1.348
-6
77.74
86.31
95.74
48
7.328
7.754
8.196 102
1.209
1.258
1.309
-5
73.94
82.01
90.88
49
7.057
7.461
7.88 103
1.173
1.222
1.272
-4
70.35
77.95
86.29
50
6.797
7.18
7.578 104
1.139
1.187
1.236
-3
66.96
74.11
81.96
51
6.548
6.912
7.289 105
1.105
1.153
1.202
44
Air Conditioner Service Manual
-2
63.74
70.48
77.87 52
6.309
-1
60.69
67.05
74
53
6.08
0
57.81
63.8
70.34
54
5.861
1
55.08
60.72
66.88
55
5.651
2
52.49
57.81
63.61
56
5.449
3
50.03
55.05
60.52
57
5.255
4
47.71
52.44
57.59 58
5.07
5
45.5
49.97
54.82
59
4.891
6
43.41
47.62
52.2
60
4.72
7
41.42
45.4
49.71
61
4.556
8
39.53
43.2
42.33
62
4.398
9
37.74
41.29
45.12
63
4.247
10
36.04
39.39
43.01
64
4.101
11
34.42
37.59
41
65
3.961
12
32.89
35.87
39.1
66
3.827
13
31.43
34.25
37.29
67
3.698
14
30.04
32.71
35.58 68
15
29.72
31.24
33.95 69
16
70
3.339
17
71
3.229
18
25.13
27.26
29.55
72
3.122
19
24.05
26.07
28.23 73
3.02
20
23.02
24.93
26.97
74
2.921
21
22.04
23.84
25.77
75
2.827
22
21.1
22.81
24.63
76
2.735
23
20.21
21.83
23.55
77
2.647
6.655 6.409 6.173 5.947 5.73 5.522 5.323 5.132 4.949 4.774 4.605 4.448 4.288 4.139 3.995 3.858
3.476 3.359 3.246 3.138 3.033 2.933 2.836 2.743
7.013 106 1.073
1.12
1.168
6.748 107 1.042
1.089
1.136
6.495 108 1.013
1.058
1.104
6.253 109 0.9833 1.028
1.074
6.02 110 0.9553 0.9997 1.045
5.798 111 0.9283 0.9719 1.016
5.585 112 0.9021 0.9451 0.9892
5.381 113 0.8765 0.9191 0.9626
5.101 114 0.8524 0.894 0.9367
4.997 115 0.8087 0.8595 0.9117
4.817 116 0.8059 0.8461 0.8875
4.644 117 0.7837 0.8233 0.8641
4.479 118 0.7623 0.8012 0.8413 4.32 119 0.7415 0.7798 0.8193 4.167 120
4.021 121 0.702 0.7386 0.7773 122 0.6631 0.7195 0.7572 123 0.6649 0.7007 0.7378
3.616 124 0.6472 0.6824 0.7189
3.491 125 0.6301 0.6647 0.7006
3.372 126 0.6135 0.6476 0.6829 3.257 127 0.5974 0.6309 0.6657 3.146 128 0.5818 0.6148 0.649
3.04 129 0.5667 0.5991 0.6328
2.938 130 0.5521 0.5839 0.6171
2.84
R²Resistance Resistance at 25:20 N
TH3: Outdoor unit discharge pipe sensor Before measuring resistance, disconnect connectors as shown above.
Preview 3-Heights(TM) PDF Optimization Shell 5.9.1.5 (http://www -tools.com)