R410A All DC Inverter V5 X Series 50Hz
MCAC-VTSM-2015-10
160 Troubleshooting
4. The type of the oil is FVC-68D, make sure the type of the oil is right because different compressors require
different oil type, incorrect oil leads to various problems.
4.25 P9: Fan module protection
4.26 H9: P9 protection appears three times in 60 minutes
If the system displays P9 protection three times in 60 minutes, the system will stop and display H9 error code.
When the system displays H9 error code, the system can resume only by restarting the machine. In the event
of H9 error code the cause should be promptly identified and addressed in order to avoid excessive damage.
P9/H9
Make sure the fan module is working
in the normal temperature range
Some power wires or signal wires of
fan module are loose
Well connect the power wires and
signal wires
The fan motor is blocked or disabled
Remove obstruction or replace the
fan motor
Output voltage between P and N on
fan module is abnormal*
Replace the power supply module
Fan module is damaged
Replace the fan module
No
Yes
Yes
Yes
Yes
No
No
No
The discharge pipe is connected to
the oil pool of the compressor by the
inner oil balance pipe; add oil from
the discharge pipe with a funnel
The fan module is too hot for heat
dissipation or high ambient
temperature
