pa
Moderate
Mitsubishi Electric · Mini-Splits & Ductless Systems
Compressor Overcurrent (CT Error)
Quick Answer
Error code PA on your Mitsubishi Electric Mini-Splits & Ductless Systems means: Compressor Overcurrent (CT Error). This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Measure compressor running amperage with an external clamp meter and compare to nameplate RLA
2
Check voltage at the outdoor unit terminal block under load (must be within rated range)
3
Inspect the compressor winding resistance and insulation to ground with a megohmmeter
4
Check the outdoor PCB current sensor for proper operation
5
Compressor failure diagnosis and replacement must be performed by a licensed HVAC technician
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Compressor
Outdoor PCB
Compressor start components
Current transformer sensor
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