Maintenance; Error Code List - Gree Dettson LOMO 19 Installation Manual

9. Maintenance

Service Manual

9.1 Error Code List

No. Malfunction Name
High pressure
1
protection of system
Low pressure
2
protection of system
High discharge
3 temperature protection of
compressor
4 Overcurrent protection
Communication
5
Malfunction
High temperature
6
resistant protection
7 EEPROM malfunction
Limit/decrease
8 frequency due to high
temperature of module
Malfunction protection of
9
jumper cap
10 Gathering refrigerant
Installation and Maintenance
Display Method of
Indoor Unit
Dual-8 Code
Display
During cooling and drying
operation, except indoor fan operates, all loads
E1 stop operation.
During heating operation, the complete unit
stops.
The Dual-8 Code Display will show E3 until the
E3
low pressure switch stop operation.
During cooling and drying
operation, compressor and
E4 outdoor fan stop while indoor fan operates.
During heating
operation, all loads stop.
During cooling and drying
operation, compressor and
E5 outdoor fan stop while indoor fan operates.
During heating
operation, all loads stop.
During cooling operation,
compressor stops while indoor fan motor
E6
operates. During heating operation, the complete
unit stops.
During cooling operation:
compressor will stop while indoor fan will operate.
E8
During heating operation, the complete unit
stops.
During cooling and drying
operation, compressor will stop
EE while indoor fan will operate;
During heating operation, the
complete unit will stop
All loads operate normally, while
EU
operation frequency for
compressor is decreased
Wireless remote receiver and
button are effective, but can
C5
not dispose the related
command
When the outdoor unit receive signal of Gathering
Fo refrigerant ,the system will be forced to run under
cooling mode for gathering refrigerant
A/C status
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.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 it's 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
Possible Causes
57