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5.12 P4(Inverter
compressor drive error diagnosis and solution)
Description:
An
abnormal inverter compressor drive is detected by a special detection circuit, including communication
signal detection, voltage detection, compressor rotation speed signal detection and so on.
Recommended parts to prepare:
• Wiring mistake
• PM malfunction
• Outdoor fan ass’y faulty
• Compressor malfunction
• Outdoor PCB faulty
Troubleshooting and repair:
Check the wiring between
the
PCB and compressor.
Is it improperly wired?
YES
Ensure proper connections or replace
the wires and connectors.
NO
Check the IPM.
Is it functioning
properly?
NO
Replace the IPM board or
replace the outdoor PCB.
YES
Check the outdoor fan and
the outdoor unit
ventilation.
Is it functioning
properly?
NO
Please refer to “Fan
Speed Malfunction”
YES
Check the compressor
resistance values.
Are they
within
acceptable parameters?
NO
Replace the compressor.
YES
Replace the outdoor PCB.
Page 81
Summary of Contents for ACP-09CH25AEMI/I
Page 1: ...SERVICE MANUAL M DESIGN INVERTER SERIES 2017 SERVICE MANUAL...
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Page 14: ...13 1 17 Information Inquiry 13...
