Bosch Climate Line 5000, Installation Instructions Manual

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Troubleshooting
Climate Line 5000 – 6721831678 (2021/02) 8
5 Troubleshooting
5.1 Faults with indication
WARNING
Risk to life from electric shock!
Touching live electrical parts can cause an electric shock.
▶ Before working on electrical parts, disconnect all phases of the
power supply (fuse/circuit breaker) and lock the isolator switch to
prevent unintentional reconnection.
If a fault occurs during operation, a fault code appears in the display
(e.g. EH 02).
If a fault is present for more than 10 minutes:
▶ Briefly interrupt the power supply and switch the indoor unit back on.
If a fault persists:
▶ Call customer service and provide the fault code and details of the
appliance.
Table 10
5.2 Faults without indication
Table 11
Fault code Possible Cause
EC 07 Fan speed of outdoor unit outside the normal range
EC 51 Faulty parameter in the EEPROM of the outdoor unit
EC 52 Temperature sensor error at T3 (condenser coil)
EC 53 Temperature sensor error at T4 (outside temperature)
EC 54 Temperature sensor error at TP (compressor discharge pipe)
EC 56 Temperature sensor error at T2B (outlet of evaporator coil; freely adjustable indoor units)
EH 0A
EH 00
Faulty parameter in the EEPROM of the indoor unit
EH 0b Communication error between main PCB of indoor unit and display
EH 02 Fault when detecting the zero-crossing signal
EH 03 Fan speed of indoor unit outside the normal range
EH 60 Temperature sensor error at T1 (room temperature)
EH 61 Temperature sensor error at T2 (centre of evaporator coil)
EL 0C Insufficient or escaping refrigerant or temperature sensor error at T2
EL 01
1)
1) Leak detection not active if in a system with multi-split air conditioner.
Communication error between indoor and outdoor unit
PC 00 Fault at IPM module or IGBT overcurrent protection
PC 01 Over- or undervoltage protection
PC 02 Temperature protection at compressor or overheating protection at IPM module or pressure relief device
PC 03 Low pressure protection
PC 04 Inverter compressor module error
PC 08 Protection against current overload
PC 40 Communication fault between main PCB of outdoor unit and main PCB of compressor drive
−− Conflicting operating mode of indoor units; operating mode of indoor units and outdoor unit must correspond.
Error Possible Cause Remedy
The output of the indoor unit is too low. Heat exchanger of outdoor or indoor unit soiled. ▶ Clean heat exchanger of outdoor or indoor unit.
Lack of refrigerant ▶ Check tightness of pipes, reseal if required.
▶ Refill refrigerant.
Outdoor unit or indoor unit is not working. No power ▶ Check power connection.
▶ Power on the indoor unit.
RCD or fuse Fuse has tripped. ▶ Check power connection.
▶ Check RCD or 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.