Maintenance; Error Code List - Gree GWH09AGA-K6DNA1A Service Manual

Service Manual

9. Maintenance

9.1 Error Code List

Malfunction
No.
Name
High
pressure
1
protection of
system
Low pressure
2 protection of
system
High
discharge
3 temperature
protection of
compressor
Overcurrent
4
protection
Communi-
5 cation
Malfunction
High
temperature
6
resistant
protection
EEPROM
7
malfunction
Limit/
decrease
frequency
8
due to high
temperature
of module
Malfunction
9 protection of
jumper cap
Installation and Maintenance
Display Method of Indoor Unit
Indicator Display (during
blinking, ON 0.5s and OFF
Dual-8
0.5s)
Code
Operation Cool Heating
Display
Indicator Indicator Indicator
E1
E3
E4
E5
E6
E8
EE
EU
C5
A/C status
During cooling and drying Possible reasons:
operation, except indoor 1. Refrigerant was superabundant;
fan operates, all loads stop 2. Poor heat exchange (including
operation. filth blockage of heat exchanger
During heating operation, the and bad radiating environment );
complete unit stops. Ambient temperature is too high.
1.Low-pressure protection
The Dual-8 Code Display will 2.Low-pressure protection of
show E3 until the low pressure system
switch stop operation. 3.Low-pressure protection of
compressor
During cooling and drying
operation, compressor and Please refer to the malfunction
outdoor fan stop while indoor analysis (discharge protection,
fan operates. During heating overload).
operation, all loads stop.
During cooling and drying
1. Supply voltage is unstable;
operation, compressor and
2. Supply voltage is too low and
outdoor fan stop while indoor
load is too high;
fan operates. During heating
3. Evaporator is dirty.
operation, all loads stop.
During cooling operation,
compressor stops while
Refer to the corresponding
indoor fan motor operates.
malfunction analysis.
During heating operation, the
complete unit stops.
During cooling operation:
compressor will stop while Refer to the malfunction analysis
indoor fan will operate. (overload, high temperature
During heating operation, the resistant).
complete unit stops.
During cooling and drying
operation, compressor will stop
Replace outdoor control panel AP1
while indoor fan will operate;
During heating operation, the
complete unit will stop
Discharging after the complete unit
is de-energized for 20mins, check
whether the thermal grease on
All loads operate normally,
IPM Module of outdoor control
while
panel AP1 is sufficient and whether
operation frequency for
the radiator is inserted tightly.
compressor is decreased
If its no use, please replace control
panel AP1.
1. No jumper cap insert on
mainboard.
Wireless remote receiver and
2. Incorrect insert of jumper cap.
button are effective, but can
3. Jumper cap damaged.
not dispose the related
4. Abnormal detecting circuit of
command
mainboard.
Possible Causes
53