Maintenance; Malfunction Display Of Indoor Unit - Gree GWH18RC-K3DNA5G Service Manual

Service Manual

9. Maintenance

9.1 Malfunction Display of Indoor Unit

1. Malfunction display requirement
When there are several malfunctions, they will be displayed circularly.
2. Malfunction display method
(1) Hardware malfunction: immediate display; refer to "malfunction display table";
(2) Operation state: immediate display; refer to "malfunction display table";
(3) Other malfunctions: it is displayed after the compressor stops for 200s; refer to "malfunction display table".
Note: when the compressor is restarted, the malfunction display delay time (200s) is cleared.
(4) When the unit is under limit frequency or frequency drop state, the display can be controlled via remote controller.
3. Display control via remote controller
Enter display control: press light button successively for 6 times within 3s to display the corresponding malfunction code;
Exit display control: pressing light button successively for 6 times within 3s or after display is shown for 5min, the display will terminate.
4. Display under test state
Dual 8 nixie tube display: minimum cooling (heating)-P0; middle cooling (heating)-P3
Nominal cooling (heating) –P1; maximum cooling (heating) –P2;
●Error Code List
Malfunction of jumper cap
No feedback from indoor unit's motor
Circuit malfunction of zero crossing detection
Indoor ambient temperature sensor is open/short-circuited
Indoor evaporator temperature sensor is open/short-circuited
Module temperature sensor is open/short-circuited
Outdoor ambient temperature sensor is open/short-circuited
Outdoor condenser tube temperature sensor is open/short-circuited
Outdoor discharge temperature sensor is open/short-circuited
Communication malfunction between indoor and outdoor units
Malfunction of phase current circuit detection for compressor
Module temperature protection
Charging malfunction of capacitor
Overload protection of compressor
Freon recovery mode
Failure start-up of compressor
Discharge high-temperature protection of compressor
Overload protection
Overcurrent protection of the complete unit
Overcurrent protection of phase current
Desynchronizing of compressor
Module current protection (IPM protection)
Low voltage protection of DC bus bar
High voltage protection of DC bus bar
PFC protection
Limit/decrease frequency due to current protection of the complete unit
Limit/decrease frequency due to module current protection (phase current)
Limit/decrease frequency due to discharge
Limit/decrease frequency due to freeze protection
Limit/decrease frequency due to overload
Limit/decrease frequency due to module temperature protection
Cold air prevention protection
Freeze protection
Malfunction of ODU DC fan
Note: Please refer to service manual for the troubleshooting procedure for outdoor unit.
Installation and Maintenance
Malfunction Name Dual-8 Nixie Tube
C5
H6
U8
F1
F2
P7
F3
F4
F5
E6
U1
P8
PU
H3
Fo
LC
E4
E8
E5
P5
H7
H5
PL
PH
HC
F8
En
F9
FH
F6
EU
E9
E2
L3
35