Gree FG20/BNa-M, Service Manual

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54
Duct Type Split Air Conditioner
Service Manual
2.3 Discharge protection
Discharge temperature protection
Measure if the discharge
temperature of compressor
reachea 130
℃
Repair the leakage of system pipe
and add refrigerant according to
the required volume on the
nameplate
Replace the conesponding
mainboard
Yes
No
Measure if the resistance of
temperature sensor is correct
Replace the conesponding
discharge temperature
senson of connecting line
No
Yes
2.4 Overcurrent Protection
Abnormal overcurrent error
Yes
No
Yes
Yes
Yes
No
No
No
If the compressor wiring is correct
If the current value is higher than
the preset value of protector
Adjust the compressor wiring
Replace the overcurent protector
Refer to high pressurer protection
Contact the power supply company
The communication resumes is
normal
If the high pressure of unit is normal
If the valtage is normal