Part 9 Troubleshooting; Malfunction Display - Gree GWH(09)MA-K3DNA2B Service Manual

Troubleshooting
9. Troubleshooting
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. Malfunction display control
The indicator lamp and dual 8 nixie tube displays shall be synchronized. That is when the indicator lamp blinks, the dual 8 nixie
tube displays the corresponding malfunction code.
4. Display control via remote controller
Enter display control: press light button successively for 4 times within 3s to display the corresponding malfunction code;
Exit display control: pressing light button successively for 4 times within 3s or after display is shown for 5min, the display will
terminate.
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;
Corresponding indicator lamp will be on for 0.3s and off for 0.3s
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
Liquid valve temperature sensor is open/short-circuited
Gas valve 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
Malfunction Name
Dual-8 Nixie
Operation
Tube
indicator
C5 blink 15 times
H6 blink 11 times
U8 blink 17 times
F1
F2
b5
b7
P7
F3
F4
F5
E6 blink 6 times
U1
Indicator Display
Cooling Heating
indicator indicator
blink once
blink twice
blink
19 times
blink
22 times
blink
18 times
blink
3 times
blink
4 times
blink
5 times
blink
12 times
39