Midea MSMABU-09HRDN8-QRD0GW User Manual

 Troubleshooting 
TS09-S: IPM malfunction or IGBT over-strong current protection diagnosis and solution
Description: When the voltage signal the IPM sends to the compressor drive chip is abnormal, the LED displays the
failure code and the AC turns off.
Recommended parts to prepare:
• Connection wires
• IPM module board
• Outdoor fan assembly
• Compressor
• Outdoor PCB
Troubleshooting and repair:
Check the wiring between
PCB and compressor.
Check the wiring between
PCB and compressor.
Does an error exist?
Does an error exist?
Ensure proper connections or
replace the wires and connectors.
Ensure proper connections or
replace the wires and connectors.
YES
NO
Are the IPM terminal
resistance uniform?
Are the IPM terminal
resistance uniform?
Replace the IPM board or
replace the outdoor PCB.
Replace the IPM board or
replace the outdoor PCB.
NO
Check the outdoor fan and the
outdoor unit ventilation.
Check the outdoor fan and the
outdoor unit ventilation.
YES
Is it in working order?
Is it in working order?
Please refer to the solution of the “ fan
speed is operating outside of the normal
range”malfunction.
Please refer to the solution of the “ fan
speed is operating outside of the normal
range”malfunction.
NO
Check the compressor
resistance values.
Check the compressor
resistance values.
YES
Are they uniform?
Are they uniform?
Replace the compressor.
Replace the compressor.
Replace the outdoor PCB.
Replace the outdoor PCB.
YES
NO
Check if the IPM
installed correctly.
Check if the IPM
installed correctly.
YES
NO
Correct the installation, tighten the
screws and apply silicon grease
Correct the installation, tighten the
screws and apply silicon grease
IPM continuity check
IPM continuity check

Midea MSMABU-09HRDN8-QRD0GW Specifications

General

Brand	Midea
Model	MSMABU-09HRDN8-QRD0GW
Category	Inverter
Language	English