Table of Contents
Advertisement
7.10
P1/PC 01(Over voltage or too low voltage protection diagnosis and solution)
Description: Abnormal increases or decreases in voltage are detected by the specified voltage detection circuit.
Recommended parts to prepare:
• Power supply wires
• IPM module board
• PCB
• Reactor
Troubleshooting and repair:
Note: For certain models, outdoor PCB cannot be removed separately. In this case, the outdoor electric
control box should be replaced as a whole.
Check the power supply.
Getting proper input
voltage ?
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 the voltage between P and N
around DC 310V, 340V or 380V?
When starting up the unit, is it
within 220V~400V?
YES
Check the reactor.
Is it in working order ?
NO
Replace the reactor.
Troubleshooting
Turn off the unit until
NO
supply voltage is fixed.
Ensure proper connections
NO
or replace the wires.
Skip this step for models which
electric control box cover cannot
be removed. See the disassembly
guide for details.
NO
Replace the IPM board.
Replace outdoor PCB.
YES
31
- Quick Links:
- Electrical Parts
- General Troubleshooting
Hide quick links:
Advertisement
Chapters
Table of Contents
Troubleshooting
