The Others - Samsung AC052MNMSEH Service Manual

4-3-23 The others

1. E465 : Compressor over load error
• If a compressor works improperly, change the compressor and check if it works properly.
 If a compressor is normal, check the assembly between Heatsink-Inverter PBA. If it is fine, change Inverter PBA.
2. E468 : Current sensor error
• Check EEPROM data.
• Check PCB operates properly.
3. E471 : Oudoor EEPROM error
• Upload EEPROM on Outdoor unit Main PBA.
4. E474 : IPM(IGBT Module) or PFCM Temperature sensor Error
• E500 : IPM is over heated
• Check IPM is well assembled to heatsink
• Check whether inlet port is clogged.
• Change IPM if it is defective one
5. E554 : Gas leak error
• Check refrigerant charge
• Check Indoor EVA sensor
• Check Service valve is open.
• Check the pipes and wires correctly connected.
6. E556 : Capacity miss match between indoor and outdoor
• Check the model name of indoor and outdoor unit and set option code on indoor unit again.
7. Outdoor overload protection control (at the stop of the compressor.) : E404
• Check whether the fan and the motor operate normally.
• Check the operation of EEV.
• Check the temperature sensor of the indoor unit heat Exchanger.
• Check the indoor unit inlet blocking.
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