Discharge Protection; Overcurrent Protection - Gree FGR20/BNa-M Service Manual

Duct Type Split Air Conditioner
Service Manual

2.3 Discharge protection

Discharge temperature protection
Measure if the discharge
temperature of compressor
reachea 130℃
Yes
Repair the leakage of system pipe
and add refrigerant according to
the required volume on the
nameplate

2.4 Overcurrent Protection

Abnormal overcurrent error
If the compressor wiring is correct
Yes
If the current value is higher than
the preset value of protector
Yes
If the high pressure of unit is normal
Yes
If the valtage is normal
Yes
The communication resumes is
normal
54
No
Measure if the resistance of
temperature sensor is correct
Yes
Replace the conesponding
mainboard
No
Adjust the compressor wiring
No
Replace the overcurent protector
No
Refer to high pressurer protection
No
Contact the power supply company
No
Replace the conesponding
discharge temperature
senson of connecting line