GREE DC INVERTER HEAT PUMP CONDENSING UNIT
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■Drive board IPM module’s 15V power supply is lower than 13.5V.
■Drive board 6-line PWM signal and the corresponding element are abnormal.
■Drive board compressor current sampling circuit element is damaged or drive chip current sampling AD terminal
is abnormal.
■Compressor is damaged.
Troubleshooting
：
3.4.11 “H6” DC Fan Error
Error display:
ODU mainboard LED displayer
Error judgment condition and method:
Mainboard doesn’t receive the signal of outdoor fan within 30s after the outdoor fan starts up.
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