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Service Manual
Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)
8.1 Multi Zone Outdoor Unit Error Codes
NOTICE
f If below error codes appear, please turn off the system and
contact an Authorized Service Provider.
Display LED STATUS
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 Over current 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 (For M4OB-36HFN8-Q, M5OD-42HFN8-Q, M5OE-42HFN8-Q)
PC 31 Low pressure protection (For M4OB-36HFN8-Q, M5OD-42HFN8-Q, M5OE-42HFN8-Q)
PC 0A High temperature protection of condenser
PC 06 Temperature protection of compressor discharge
PC 0L Low ambient temperature protection
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 56 Evaporator coil outlet temperature sensor T2B is in open circuit or has short circuited
EC 50 Open or short circuit of outdoor unit temperature sensor(T3,T4.T5)
Table 21
For Indoor Error Codes, please refer to the indoor service manual.
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