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Maintenance
4.2 Outdoor unit error messages
Led signaling on the board (only on 35M - 53M - M70 units)
Flashing= error displayed on the indoor unit
Slow flashing = stand-by
LED on = unit ON
Error code Description
EC 51 Outdoor EEPROM malfunction
EL 01 Indoor / outdoor units communication error
PC 40 Communication malfunction between IPM board and outdoor main board
PC 08 Outdoor overcurrent protection
PC 10 Outdoor unit low AC voltage protection
PC 11 Outdoor unit main control board DC bus high voltage protection
PC 12 Outdoor unit main control board DC bus high voltage protection / 341 MCE error
PC 00 IPM module protection
PC 0F PFC module protection
EC 71 Overcurrent failure of outdoor DC fan motor
EC 72 Lack phase failure of outdoor DC fan motor
EC 07 Outdoor fan speed has been out of control
PC 43 Outdoor compressor lack phase protection
PC 44 Outdoor unit zero speed protection
PC 45 Outdoor unit IR chip drive failure
PC 46 Compressor speed has been out of control
PC 49 Compressor overcurrent failure
PC 30 High pressure protection
PC 31 Low pressure protection
PC 0A High temperature protection of condenser
PC 06 Temperature protection of compressor discharge
PC 02 Top temperature protection of compressor
EC 52 Condenser coil temperature sensor T3 is in open circuit or has short circuited
EC 53 Outdoor room temperature sensor T4 is in open circuit or has short circuited
EC 54 Compressor discharge temperature sensor TP is in open circuit or has short circuited
EC 50 Open or short circuit of outdoor unit temperature sensor (T3,T4.TP)
PC 0L Low ambient temperature protection
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