Inverter AC Error Code P9 then E9


Old 06-13-18, 02:16 AM
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Inverter AC Error Code P9 then E9

My 1 Ton Split AC (Inverter Type) is having a peculiar problem. It switches on and cools without any issue in the beginning, after few minutes it displays P9 Error, by now the compressor auto cut-off, then again the compressor starts on its own and after few minutes, the error code P9 changes to E9 and the compressor again shuts off and doesn't start again.

I checked the issue closely using a energy meter and found whenever the power intake reaches 1.2 kW and above, the error P9 appears and then changes to E9, so if I keep the set temperature with minimal difference to outdoor temperature, the power intake stays below 1.2 kW, the AC keeps running for hours without any issue. The moment I decrease the set temperature, the power intake increases and the error code comes.

What could be wrong? Is it something wrong with the outdoor unit power supply PCB? (Attached herewith the PCB pictures in the outdoor unit) Since I don't have the manufacturer support, I need to rectify it myself.

Request somebody to help me out.
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Old 06-13-18, 06:05 AM
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The inventor of mini splits had horns.

Have you tried to download the manual to allow you to look up the codes?

What is the make and complete model number of the equipment?
Old 06-13-18, 09:45 AM
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Unfortunately I couldn’t find any manual online to look for the codes. The make is IFB and model number is IACS12L0TC. It is one ton capacity hot and cold model.

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