Ipm (Inverter) Overheating; E554 - Samsung RC090MHXEA Service Manual

E500

IPM (inverter) overheating

If you don't use heat paste or don't tighten the screws into the heat sink you will see
E500.
Tighten the screws, put heat paste under the chip s and check the fan motor top runs
when the compressor is running

E554

Gas leak error. The unit has detected that there is no rise in compressor discharge
temperature despite the compressor operating, this means there is a refrigerant
error.
Carry out test on page 6.
Fault code E601 see E604
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