Faults Not Indicated - Bosch Climate 5000 L Installation Instructions Manual

Troubleshooting
Fault code Content
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
Table 17 Outdoor unit fault codes
wired controller
The wired room controller may display a different fault code to the indoor
unit, although it is referring to the same fault.
7.2

Faults not indicated

Fault
The output of the indoor unit is too low.
Outdoor unit or indoor unit is not working.
Outdoor unit or indoor unit starts and stops
continuously.
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 66. Use
only ex-protected ceramic fuses.
Table 19
64
Fault code
EH b3
Table 18
Possible cause
Heat exchanger of the outdoor or indoor unit
contaminated or partially blocked.
Shortage of refrigerant
No current
Leakage protector or fuse installed in the
1)
device has blown.
Insufficient refrigerant in the system.
Too much refrigerant in the system.
Moisture or impurities in the refrigerant circuit.
Voltage fluctuations too high.
Defective compressor.
Possible cause
Communication fault between wired room
controller and indoor unit. Check communication
cable.
Remedy
▶ Clean heat exchanger of outdoor or indoor
unit.
▶ Check tightness of pipes, reseal if required.
▶ Refill refrigerant.
▶ Check power connection.
▶ Power on the IDU.
▶ Check power connection.
▶ Check the leckage protection and fuse.
▶ Check tightness of pipes, reseal if required.
▶ Refill refrigerant.
Remove refrigerant with refrigerant recovery
unit.
▶ Evacuate refrigerant circuit.
▶ Fill with new refrigerant.
▶ Install voltage regulator.
▶ Replace compressor.
Climate 5000 L • Climate 5000i U/L – 6721841493 (2022/05)