MAINTENACE 0760 
GMV5 COMPACT MULTI VRF UNIT 
SERVICE MANUAL 
Desynchronizing protection 
of inverter compressor1 
Malfunction of low-pressure 
sensor 
Phase-lacking of inverter 
compressor1 
Malfunction of 
high-pressure sensor 
Malfunction of phase current 
testing for compressor1   
Power protection of 
compressor1 
Malfunction of discharge 
temperature sensor of 
compressor 2 
Over loading for 
compressor2   
Discharge protection for 
compressor1 
Demagnetization protection 
for compressor2 
Desynchronizing protection 
of inverter compressor2 
Phase-lacking of inverter 
compressor2 
Malfunction of phase current 
testing for compressor1   
Power protection of 
compressor1 
Over loading for 
compressor2 
Discharge protection for 
compressor2 
Refrigerant-lacking 
protection 
Note: The flicker times of driveboard are equal to that of mainboard, and its malfunction is also the same.