GREE ELECTRIC GDN20AQ-E4EBA1A User manual

Service Manual
GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI
Change for Life
Service Manual
Model:GDN20AQ-E4EBA1A
GDN24AQ-E4EBA1A
(Refrigerant R134a)

Service Manual
Table of Contents
Part Ⅰ: Technical Information............................................................ 1
1.Summary...................................................................................................... 1
2.Specications ........................................................................................... 2
3.Outline Dimension Diagram.............................................................. 3
4.Refrigerant System Diagram ............................................................ 4
5.Electrical Part............................................................................................ 5
5.1 Wiring Diagram ........................................................................................... 5
5.2 PCB Printed Diagram.................................................................................. 6
6.Function and Control............................................................................ 8
6.1 Control Panel Instruction............................................................................. 8
6.2 Introduction of Basic Mode Function......................................................... 10
Part Ⅱ: Maintenance ............................................................................ 11
7.Notes Maintenance .............................................................................. 11
8.Maintenance............................................................................................. 13
8.1 Error Code................................................................................................. 13
8.2 Malfunction Detection Flowchart............................................................... 14
8.3 Maintenance Method for Common Malfunction ........................................ 16
9.Exploded View and Parts List ........................................................ 18
10.Removal Procedure........................................................................... 20
Appendix:...................................................................................................... 27
Appendix 1: Reference Sheet of Celsius and Fahrenheit ............................... 27
Appendix 2: Resistance Table of Ambient Temperature Sensor ..................... 28
Appendix 3: Resistance Value Table of Humidity Sensor ............................... 33
Table of Contents

1
Technical Information
Service Manual
1.Summary
Part Ⅰ: Technical Information

2Technical Information
Service Manual
2.Specications
The above data is subject to change without notice; please refer to the nameplate of the unit.
Model GDN20AQ-E4EBA1A GDN24AQ-E4EBA1A
Product Code CK051021100 CK051021200
Power Supply
Rated Voltage V~ 220-240 220-240
Rated Frequency Hz 50 50
Phases 1 1
Rated Dehumidication Capacity L/h 0.48 0.52
Power Input W 260 280
Current Input A 1.3 1.3
Set Humidity Range % 35~80 35~80
Air Flow Volume(H/M/L) m3/h 185/165/145 185/165/145
Fan Motor Speed(H/M/L) r/min 1150/1050/980 1150/1050/980
Fan Motor Power Output W 8 8
Fan Motor RLA A 0.14 0.14
Fan Motor Capacitor μF 1.5 1.5
Fan Type Centrifugal Centrifugal
Fan Diameter Length(DXL) mm Φ180X62.5 Φ180X62.5
Throttling Method Capillary Capillary
Fuse Current A 3.15 3.15
Sound Pressure Level(H/M/L) dB (A) 48/46/44 48/46/44
Sound Power Level(H/M/L) dB (A) 58/56/54 58/56/54
Climate Type T1 T1
Isolation I I
Moisture Protection IPX0 IPX0
Permissible Excessive Operating Pressure for the
Discharge Side MPa 1.7 1.7
Permissible Excessive Operating Pressure for the
Suction Side MPa 0.6 0.6
Dimension (WXHXD) mm 351X492X260 351X492X260
Dimension of Carton Box(LXWXH) mm 404X326X515 404X326X515
Dimension of Package(LXWXH) mm 407X329X530 407X329X530
Application Area m228 34
Net Weight kg 15 15
Gross Weight kg 17 17
Refrigerant R134a R134a
Refrigerant Charge kg 0.13 0.2
Bucket Capacity L 3.6/4.2 3.6/4.2
Control Type Electronic Electronic
Evaporator
Evaporator Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Evaporator Pipe Diameter mm Φ7 Φ7
Evaporator Row-n Gap mm 2-1.4 2-1.4
Evaporator Coil Length (LXDXW) mm 245X25.4X190.5 245X25.4X190.5
Condenser
Condenser Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Condenser Pipe Diameter mm Φ5 Φ5
Condenser Rows-n Gap mm 2-1.4 3-1.4
Condenser Coil Length (LXDXW) mm 245X22.8X190.5 245X34.2X190.5
Compressor
Compressor Manufacturer RECHI PRECISION CO.,LTD. RECHI PRECISION CO.,LTD.
Compressor Model 39E0G3HR&F^YA 39E073HR&F^YA
Compressor Type Rotary Rotary
Compressor Power Input W 265 300
Compressor Overload Protector UP3-016 UP3-017
Compressor LRA. A 5.5 5.5
Compressor RLA A 1.2 1.4

3
Technical Information
Service Manual
3.Outline Dimension Diagram
unit:mm
492 521
260
351

4Technical Information
Service Manual
4.Refrigerant System Diagram
air in
evaporator
capillary
condenser
fan motor
air out
compressor
Dehumidifying principle of dehumidier:
When temperature is decreased to the temperature point of dew, water vapor in humid air will condensate. Dehumidier is
dehumidifying the air by using this principle.
During operation of the system, air will pass through evaporator and condenser in turn and then be discharged due to centrifugal
blade. When the air is passing through evaporator, refrigerant will absorb the heat in air to let its temperature decrease to the
temperature point of dew, water vapor in air will condensate. Condensate water comes into water tank through water tray, or is
discharged directly through drainage hose. The saturated low-temperature air passed through the evaporator will absorb the heat
when owing along the condenser, and then become the dry air. Under normal condition, the nearby air will become warm during
operation of dehumidier.

5
Technical Information
Service Manual
Symbol Symbol Color Symbol Symbol Color Symbol Name
WH White GN Green COMP Compressor
YE Yellow BN Brown Grounding wire
RD Red BU Blue / /
YEGN Yellow/Green BK Black / /
VT Violet OG Orange / /
5.Electrical Part
5.1 Wiring Diagram
●Instruction
These circuit diagrames are subject to change without notice ,please refer to the one supplied with the unit.
AC-L
YEGN
0
TUBE
TEMP.SENSOR
SENSOR
C1
C
RD
YEGN
BU
BN
CN1
HUMIDITY
TUBE
AP2
CN4
CN1
FAN
AP1
L
N
COMP.
M1
LIQUID LEVEL SWITCH
N1
PE
RT1
POWER
FAN
MOTOR
PE
YEGN
COMP.
PE
COMP-L
SA
COM
N0
BU
BN
CN2
CN2
AP3
CN2
C2
YE
BU
BU
R(M)
S
PE
PE
YEGN

6Technical Information
Service Manual
Silk Screen on Main Board
5.2 PCB Printed Diagram
● Top view
● Bottom view
No. Name No. Name
1 Interface of water level switch of watertank 4 Interface of fan motor
2 Interface of display board 5 Interface of neutral wire
3 Fuse 6 Compressor relay
1 2
3
4
5
6

7
Technical Information
Service Manual
Silk Screen on Display Board1
● Top view
● Bottom view
1 Buzzer 2 Needle stand of pipe temperature sensor 3Dual-8 digital display tube
4Connection wire of breathing
light board 5 Connection wire of board6
Needle stand of humidity and
ambient temperature sensor
7 Power supply indicator 8 On/off button 9Continuous button
10 Mode button 11 "+" button 12 "-" button
13 Fan speed button 14 Timer button 15 Filter button
1
234567
891011121415 13

8Technical Information
Service Manual
6.Function and Control
6.1 Control Panel Instruction
74 3 82561
clean the lter
indicator light
Bucket full light
indicates bucket
needs to be emptied
or it is not in the
proper place
sleeping
space
mode on
indicator
light
timer on
indicator
light
lock on
indicator
light
high, mid
and low fan
indicator light
living space
mode on
indicator
light
power on
indicator
light
continuous operation
on indicator light
basement
mode on
indicator
light
Notes:
● Water bucket must be correctly installed for the dehumidier to operate.
● Do not remove the bucket while unit is in operation.
● If you want to use drain hose to drain water away, please install the hose according to section "Drainage method".
● Each time pressing the effective button on the control panel will give out a "beep" sound.
● When power is connected, power indicator on the control panel will be on and dehumidier gives out a "beep" sound simultaneously.
Basic Functions of the Buttons
1POWER Button
Press this button to turn on/off dehumidier.
1
+/- Button
Under free drying mode press these buttons to adjust set humidity. Invalid under other modes.
● Pressing + button will increase humidity while pressing - button will decrease humidity. The display range of humidity is 35%~80%.
Each pressing will increase/decrease humidity by 5%.
● When setting Timer On or Timer Off, press these buttons to adjust time. For specific details, please refer to Timer Button
description below.
● When unit is in operation, holding + and - button simultaneously for 3s can lock buttons. If this function is turned on, Button Locked
Indicator will be on and display window shows LC, which will blink for 3 times. Then ambi ent humidity is displayed again. To turn off
this function, hold + and - button simultaneously for 3s and the indicator will be off.
2
Pressing this button can set fan speed circularly as: High, Medium, Low. Corresponding indicator will be on for each fan speed.
FAN SPEED Button
3
Press this button to set Timer On or Timer Off (Timing range 0.5~24h).
● Set Timer Off:
When unit is on, press this button and the Timer Indicator will be on while display window will show the timing gure. Pressing + or
- button each time will increase or decrease the time by 0.5h or 1h (When gure varies within10h, pressing +/- button will increase/
decrease the time by 0.5h; when gure varies from 10h to 24h, pressing +/- button will increase/decrease the time by 1h). When time
is set, wait for 5s or press this button to turn this function on. Timing Indicator will be on.
● Cancel Timer Off:
Under the condition that this function is turned on, press this button to cancel it. Timing Indicator will be off.
TIMER Button
4