Maintenance - Gree GTH(09)CA-K6DNA1A/I Service Manual

8. Maintenance

8.1 Error Code List
Error Malfunction
No.
code name
High pressure
1 E1
protection
Freeze
2 E2
protection
Low pressure
protection
Refrigerant
3 E3
lacking
protection
Refrigerant
recycling mode
Compressor
high discharge
4 E4
temperature
protection
Communicatio
5 E6
n malfunction
Malfunction of
indoor ambient
6 F0 temperature
sensor at air
return port
Malfunction of
evaporator
7 F1
temperature
sensor
Malfunction of
condenser
8 F2
temperature
sensor
26
Table 1 Fault Display on Indoor Wired Controller
Origin of
malfunction
signal
When outdoor unit detects the high pressure switch is cut off for 3s
successively, high pressure protection will occur. All the loads (except
High pressure the 4-way valve in heating mode) will be switched off. In this case, all
switch the buttons and remote control signals except ON/OFF button will be
disabled and cannot be recovered automatically. Switch off the unit or
re-energize the unit after cutting off power to eliminate this protection.
If detecting that the evaporator temperature is lower than protective
Indoor temp. Value after the unit has been running for a period of time under
evaporator cooling or dry mode, the unit will report this fault, in which case the
temperature compressor and outdoor fan motor will be stopped. The unit will not run
sensor until evaporator temperature is higher than the protective temp. value
and the compressor is stopped for 3min.
If it is detected within 30s successively that the low-pressure switch is
Low pressure cut off under ON or standby state, the unit will report low pressure
switch protection. If the fault occurs successively 3 times within 30min, the unit
cannot be recovered automatically.
If the unit reports system refrigerant lacking within 10min after turning
- on the unit, the unit will stop operation. If the fault occurs successively 3
times, the unit cannot be recovered automatically.
If enter refrigerant recycling mode through special operation, E3 will be
- displayed. After exiting refrigerant recycling mode, the code will
disappear.
If outdoor unit detects that the discharge temperature is higher than
Compressor
protective temp. Value, the unit will report high discharge temperature
discharge
protection. If the protection occurs over 6 times, the unit cannot be
temperature is
recovered automatically. Switch off the unit or re-energize the unit after
high
cutting off power to eliminate this protection.
If the outdoor unit does not receive data from indoor unit,
Communicatio communication malfunction will be reported. If there is communication
n between abnormity between display board and indoor unit, communication
indoor and malfunction will be reported too.If not powering on the outdoor unit,
outdoor communication malfunction will be reported. (As for the 3 phase Power
mainboard supply model, if the wrong connection, would be caused commuication
erro.)
If the indoor ambient temperature sensor is detected of open circuit or
short circuit for 5s successively, indoor ambient temperature sensor
Indoor ambient
malfunction will be reported. The unit can automatically resume
temperature
operation after the malfunction disappears. If indoor ambient
sensor
temperature sensor malfunction occurs in fan mode, only the error code
is displayed and the indoor unit can work normally.
If the indoor evaporator temperature sensor is detected of open circuit
or short circuit for 5s successively, evaporator temperature sensor
Evaporator
malfunction will be reported. The unit can automatically resume
temperature
operation after the malfunction disappears. If evaporator temperature
sensor
sensor malfunction occurs in fan mode, only the error code is displayed
and the indoor unit can work normally.
If the outdoor condenser temperature sensor is detected of open circuit
or short circuit for 5s successively, condenser temperature sensor
Condenser
malfunction will be reported. The unit can automatically resume
temperature
operation after the malfunction disappears. If condenser temperature
sensor
sensor malfunction occurs in fan mode, only the error code is displayed
and the indoor unit can work normally.
Control description
Service Manual
Installation and Maintenance