High Dc Bus-Bar Voltage/Low Dc Bus-Bar Voltage; Overcurrent Protection Of Compressor Phase Current; Module Temperature Sensor Circuit Failure; Module High Temperature Protection - Gree Neo GWH09MA-A3DNA3A Installation, Service & Troubleshooting

PH, PL, P5, P7, P8 Error Codes
PH
High DC Bus-Bar Voltage
Status:
During cooling mode, compressor will stop,
indoor fan will run. Heating mode all units
stop.
PL
P5
P7

Module Temperature Sensor Circuit Failure

Status:
During cooling mode, compressor will stop,
indoor fan will run. Heating mode all units
stop.
P8

Module High Temperature Protection

Status:
During cooling mode, compressor will stop,
indoor fan will run. Heating mode all units
stop.
Error Code Diagnostics
Fault & Status
Low DC Bus-Bar Voltage
Status:
During cooling mode, compressor will stop,
indoor fan will run. Heating mode all units
stop.
Overcurrent Protection of Compressor Phase
Current
Status:
During heating mode, complete unit will stop
Possible Causes
1. Measure the voltage on "L" & "N" on line
voltage, if it is higher then 265vac, correct
high voltage.
2. If AC voltage is normal, measure the voltage
on the electrolytic capacitor on control panel
AP1, if it is normal replace the AP1 board.
1. Measure the voltage on "L" & "N" on line
voltage, if it is lower then 200vac, correct
incoming voltage.
2. If AC voltage is normal, measure the voltage
on the electrolytic capacitor on control panel
AP1, if it is normal replace the AP1 board.
1. Refer to "H7" troubleshooting
1. Replace outdoor control panel AP1
1. After unit is de-energized for 20 minutes,
check for proper thermal grease on IPM
module of outdoor control panel AP1 and
contact is good. If this is OK, replace AP1
control module of outdoor unit.
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