Gree FGR20Pd/DNa-X Service Manual page 94

GREE
(24) "dC" Capacity DIP switch setting error
Error display: wired controller of IDU and the dash receiver of IDU will display
Error judgment condition and method:
If capacity DIP switch is set to the wrong position, report the error.
Possible reason：
1) Capacity DIP switch is set to the wrong position.
2) Detecting circuit is abnormal.
(25) "db" Project debugging
Error display: ODU mainboard, IDU displays
Error judgment condition and method:This is a status code of project debugging, not a error code.
When IDU or ODU displays this code, it means the unit is under debugging status and the IDU cannot be
operated.
Troubleshooting: ——
Possible reason：——
(26) "E1" high pressure protection
Error display: ODU mainboard, IDU displays
Applicable model: all models.
Error judgment condition and method：Judge through detecting the real-time high pressure or
the high pressure switch. If the sensor detects that the high pressure value is over 65°C or the high
pressure switch is disconnected, then it is judged as high pressure, the system will stop the unit for
protection.
Possible reason：
1) Cut-off valve of ODU is not opened;
2) High pressure switch operation is abnormal;
3) Outdoor or indoor fan is abnormal;
4) Filter screen of IDU or air duct is blocked (heating mode);
5) Ambient operation temperature is too high;
6) Refrigerant charging of the system is too much;
7) System pipeline is blocked;
Duct type split Air conditioner Inverter Series
.
.
92
.