MrCool DIY E Star Series Installation & Owner's Manual page 53

10.9 Error Code: PC 01 (Over voltage or too low voltage protection diagnosis and solution)
Description: Abnormal increases or decreases in voltage are detected by checking the specified voltage
detection circuit.
Recommended parts to prepare:
• Power supply wires
• IPM module board
• PCB
• Reactor
Troubleshooting and repair:
the voltage between P and N is around
DC 310V, 340V, or 380V? When the
unit is started, is it in 220V~400V?
Note: For certain models, the outdoor PCB cannot be removed separately. In this case, the outdoor
electric control box should be replaced as a whole.
The error codes and descriptions are for reference only. If your system displays any of
these codes contact a qualified technician to investigate the matter further.
Check the power supply. .
Is it in working order?
YES
Check the connections and wires.
Are they in working order?
YES
Power on and measure the
voltage between P and N.
While the unit is in standby, is
YES
Check the reactor.
Is it in working order?
YES
Replace the reactor.
****Disclaimer****
NO Turn off the unit.
Ensure proper connections or
NO
replace the wires.
NO Replace the IPM board. .
NO Replace outdoor PCB.
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