Pc 01 (Over Voltage Or Too Low Voltage Protection Diag. And Solution) - MrCool DIY E Star Series Troubleshooting Manual

7.10 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:
is the voltage between P and N is around
DC 310V, 340V or 380V? When start up
Note: For certain models, outdoor PCB could not be removed separately. In this case, the outdoor electric
control box should be replaced as a whole.
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,
the unit, is it in 220V~400V?
YES
Check the reactor.
Is it in working order?
YES
Replace the reactor .
Troubleshooting 30
NO Turn off the unit.
Ensure proper connections or
NO
replace the wires .
NO Replace the IPM board
NO Replace outdoor PCB .