Maintenance; Error Code List - Gree GWH09QB-K6DNA5E Service Manual

Service Manual

9. Maintenance

9.1 Error Code List

Dual-8
Malfunction
No.
Code
Name
Display
High
pressure
1 E1
protection of
system
Antifreezing
2 E2
protection
In defect of
3 F0
refrigerant
High
discharge
4 temperature E4
protection of
compressor
Overcurrent
5 E5
protection
Communi-
6 cation E6
Malfunction
High
temperature
7 E8
resistant
protection
EEPRoM
8 EE
malfunction
Limit/
decrease
frequency
9 EU
due to high
temperature
of module
Malfunction
10 protection of C5
jumper cap
Installation and Maintenance
Display Method of Indoor Unit
Indicator Display (during
blinking, ON 0.5s and OFF
0.5s)
operation Cool Heating
Indicator Indicator Indicator
A/C status
During cooling and drying
operation, except indoor fan operates, all
loads stop operation.
During heating operation, the complete unit
stops.
During cooling and drying
operation, compressor and
outdoor fan stop while indoor fan operates.
The Dual-8 Code Display will show F0 and the
complete unit stops.
During cooling and drying
operation, compressor and
outdoor fan stop while indoor fan operates.
During heating
operation, all loads stop.
During cooling and drying
operation, compressor and
outdoor fan stop while indoor fan operates.
During heating
operation, all loads stop.
During cooling operation,
compressor stops while indoor fan motor
operates. During heating operation, the
complete unit stops.
During cooling operation:
compressor will stop while indoor fan will
operate. During heating operation, the
complete unit stops.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
All loads operate normally, while
operation frequency for
compressor is decreased
Wireless remote receiver and
button are effective, but can
not dispose the related
command
Possible Causes
Possible reasons:
1. Refrigerant was superabundant;
2. Poor heat exchange (including filth
blockage of heat exchanger and bad radiating
environment );
Ambient temperature is too high.
1. Poor air-return in indoor unit;
2. Fan speed is abnormal;
3. Evaporator is dirty.
1. In defect of refrigerant;
2. Indoor evaporator temperature sensor
works abnormally;
3. The unit has been plugged up
somewhere.
Please refer to the malfunction analysis
(discharge protection, overload).
1. Supply voltage is unstable;
2. Supply voltage is too low and load is too
high;
3. Evaporator is dirty.
Refer to the corresponding malfunction
analysis.
Refer to the malfunction analysis (overload,
high temperature resistant).
Replace outdoor control panel AP1
Discharging after the complete unit is de-
energized for 20mins, check whether the
thermal grease on
IPM Module of outdoor control panel AP1 is
sufficient and whether the radiator is inserted
tightly.
If its no use, please replace control panel AP1.
1. No jumper cap insert on
mainboard.
2. Incorrect insert of jumper cap.
3. Jumper cap damaged.
4. Abnormal detecting circuit of
mainboard.
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