Aircon Inverter Power Module (IPM)
The inverter power module, often called IPM, is part of the outdoor inverter drive path. If it fails, compressor control can stop or become unstable.
What This Part Does
The IPM is part of the outdoor inverter drive path for compressor control.
It works with the outdoor PCB and sensor paths to control compressor operation.
If the IPM fails, compressor drive control can stop or behave abnormally.
How You Would Notice
Users may see no cooling, repeated cut-out, or unstable operation on inverter systems.
Some cases also look like outdoor PCB or compressor faults because the symptoms overlap.
From the room side, the pattern may just look like weak or failing cooling.
- No cooling or unstable cooling on inverter unit
- Repeated cut-out or trip pattern
- Outdoor control fault-like behavior
It Might Not Be The Inverter Power Module
Outdoor PCB faults can create similar control failure patterns.
Compressor faults or sensor-path faults can also trigger protective behavior that looks like an IPM issue.
We compare compressor, board, and sensor behavior before recommending IPM replacement.
How We Check
We review the operating pattern and confirm whether the fault matches an inverter drive-path problem.
Then we check the outdoor PCB, sensor inputs, and compressor behavior around the same events.
If the pattern points to the drive path and the other checks do not explain it, the IPM becomes more likely.
We recommend IPM replacement only after the supporting fault path is confirmed.
What We Find And What Happens Next
Inverter-control failures usually narrow down to IPM fault, outdoor PCB fault, sensor-path issue, or compressor-side fault.
| Finding | Next Step |
|---|---|
| IPM fault pattern confirmed | Replace IPM path and retest |
| Outdoor PCB fault pattern | Outdoor PCB assessment |
| Sensor-path issue | Check pressure or current sensor path |
| Compressor-side issue | Compressor assessment |
About The Repair
IPM replacement is a targeted inverter-control repair and not a first-guess part swap.
Replacing the IPM will not fix compressor or sensor faults.
We confirm the inverter fault path before recommending the part work.
After Replacement
Cooling and compressor control should become stable if the IPM was the main fault.
If the same fault pattern remains, another part in the inverter path may still be at fault.
We retest operating behavior before closing the job.
When We Tell You To Wait
If the event happened once and the system is stable now, short-term monitoring may be reasonable.
If the unit keeps cutting out or failing to cool, early checks are better because inverter faults can repeat suddenly.
We will tell you when the pattern looks like an intermittent event versus an active inverter fault.