Bosch Climate 5000L - Faults Not Indicated

Troubleshooting
Climate 5000L • Climate 5000i U/L – 6721841492 (2022/03)
58
Outdoor Unit
Table 12 Outdoor unit fault codes
6.2 Faults not indicated
Table 13
Fault code Content
EC 51 Outdoor unit EEPROM fault
EL 01 Communication fault between outdoor and indoor unit
PC 40 Communication fault between PCI and printed circuit board of outdoor unit
PC 08 Overcurrent protection of outdoor unit
PC 10 Low-voltage protection of outdoor unit AC voltage
PC 11 Overvoltage protector of DC-bus for outdoor unit PCB
PC 12 Overvoltage protector of DC-bus for outdoor unit PCB/341/MCE fault
PC 00 IPM module protection
PC 0F PFC module protection
EC 71 Overvoltage defect in fan motor (DC current) of outdoor unit
EC 72 Missing phase detection of outdoor unit fan motor (direct current)
EC 07 Fan speed of outdoor unit out of control
PC 43 Phase detection protection of outdoor unit compressor
PC 44 Zero speed protection of outdoor unit
PC 45 IR control failure (outdoor unit)
PC 46 Compressor speed out of control
PC 49 Overvoltage defect in compressor
PC 30 High-pressure protection
PC 31 Low-pressure protection
PC 0A Condenser high-temperature protection
PC 06 Compressor discharge temperature protection
PC 02 Maximum temperature protection of compressor
EC 52 Temperature sensor T3 (pipe temperature sensor) switched off or short-circuited
EC 53 Temperature sensor T4 (outside temperature) switched off or short-circuited
EC 54 Temperature sensor TP (compressor discharge temperature protection) switched off or short-circuited
Fault Possible cause Remedy
The output of the indoor unit is too low. Heat exchanger of the outdoor or indoor unit
contaminated or partially blocked.
▶ Clean heat exchanger of outdoor or indoor
unit.
Shortage of refrigerant ▶ Check tightness of pipes, reseal if required.
▶ Refill refrigerant.
Outdoor unit or indoor unit is not working. No current ▶ Check power connection.
▶ Power on the IDU.
Leakage protector or fuse installed in the
device
1)
has blown.
1) A fuse for the overcurrent protection is located on the main PCB. The specification is printed on the main PCB and can also be found in the technical data on page 60. Use
only ex-protected ceramic fuses.
▶ Check power connection.
▶ Check the leckage protection and fuse.
Outdoor unit or indoor unit starts and stops
continuously.
Insufficient refrigerant in the system. ▶ Check tightness of pipes, reseal if required.
▶ Refill refrigerant.
Too much refrigerant in the system. Remove refrigerant with refrigerant recovery
unit.
Moisture or impurities in the refrigerant circuit. ▶ Evacuate refrigerant circuit.
▶ Fill with new refrigerant.
Voltage fluctuations too high. ▶ Install voltage regulator.
Defective compressor. ▶ Replace compressor.