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Midea MSMBB-12HRFN1-MU0W User Manual

Midea MSMBB-12HRFN1-MU0W
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Troubleshooting
Page 99
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
IPM malfunction
Faulty outdoor fan assembly
Compressor malfunction
Faulty outdoor PCB
Troubleshooting and repair:
Check the wiring between the
PCB and compressor.
Is it improperly wired?
Ensure proper connections or replace
the wires and connectors.
YES
Check the IPM.
NO
Is it functioning
properly?
Replace the IPM board or
replace the outdoor PCB.
NO
Check the outdoor fan and
the outdoor unit ventilation.
YES
Is it functioning
properly?
Please refer to “Fan
Speed Malfunction”
NO
Check the compressor
resistance values.
YES
Are they within
acceptable parameters?
Replace the compressor.NO
Replace the outdoor PCB.
YES

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Midea MSMBB-12HRFN1-MU0W Specifications

General IconGeneral
BrandMidea
ModelMSMBB-12HRFN1-MU0W
CategoryAir Conditioner
LanguageEnglish

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