Maintenance; Error Code List - Gree GWH07QA-K6DNC4A Service Manual

9. Maintenance

9.1 Error Code List

Display Method
Malfunction
of Indoor Unit
Name
(Error Code)
High pressure
protection of E1
system
Antifreezing
protection for E2
evaporator
System block
or refrigerant E3
leakage
High discharge
temperature
E4
protection of
compressor
Overcurrent
E5
protection
Communi-
cation E6
Malfunction
High
temperature
E8
resistant
protection
EEPROM
EE
malfunction
Limit/decrease
frequency due
to high EU
temperature of
module
Malfunction
protection of C5
jumper cap
Gathering
F0
refrigerant
Indoor ambient
temperature
sensor is F1
open/short
circuited
Indoor
evaporator
temperature
F2
sensor is
open/short
circuited
98
A/C Status
During cooling and drying operation,
except indoor fan operates, all loads
stop operation.
During heating operation, the complete
unit stops.
The Dual-8 Code Display will show
E3 until the low pressure switch stop
operation.
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
When the outdoor unit receive signal of
Gathering refrigerant ,the system will
be forced to run under cooling mode for
gathering refrigerant
During cooling and drying operation,
indoor unit operates while other loads
will stop; during heating operation, the
complete unit will stop operation.
AC stops operation once reaches the
setting temperature. Cooling, drying:
internal fan motor stops operation while
other loads stop operation; heating: AC
stop operation
Possible Causes(For specific maintenance
method, please refer to the following procedure of
troubleshooting)
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.
Not the error code. It's the status code for the operation.
1.Low-pressure protection
2.Low-pressure protection of system
3.Low-pressure protection of compressor
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.
Nominal cooling mode
1. Loosening or bad contact of indoor ambient temp. sensor
and mainboard terminal.
2. Components in mainboard fell down leads short circuit.
3. Indoor ambient temp. sensor damaged.(check with sensor
resistance value chart)
4. Mainboard damaged.
1. Loosening or bad contact of Indoor evaporator temp.
sensor and mainboard terminal.
2. Components on the mainboard fall down leads short
circuit.
3. Indoor evaporator temp. sensor damaged.(check temp.
sensor value chart for testing)
4. Mainboard damaged.
Service Manual
Installation and Maintenance