Bosch CL8001i-Set 35 HE T, Installer'S Manual

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Troubleshooting
39
Climate Class 6000i/8000i – 6721831489 (2021/02)
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.
A fault on the device can also be indicated by the sequential flashing of
the following lights:
• ON indicator
K
(green)
• Timer lamp (orange)
• WLAN lamp (green)
The number of flashing signs specify the number of the fault codes.
When the fault 23 – 4 occurs for example, the ON indicator
K
(green)
flashes twice, then the timer light (orange) flashes 3 times and the
WLAN light (green) flashes 4 times. As an alternative, the fault code
called up via the remote control

operating instructions.
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 about the fault, providing details of the fault
code and appliance.
Table 9
5.2 Faults without indication
Table 10
Fault code Possible Cause
00 – 0 Normal Operation
01 – ... Short circuit on the thermistor of the outdoor unit
02 – ... Fault caused by the temperature in the compressor or heat exchanger being too high
03 – 0 For protection, the outdoor unit is switched off for a short time.
05 – ... Open electric circuit on the thermistor of the outdoor unit
06 – ...
07 – ... Overloading from insufficient refrigerant or blocked air inlet/outlet. Fault at IPM module or overcurrent protection of the
outdoor unit main PCB.
09 – ... Fault at thermistor or 4-way valve or insufficient refrigerant.
10 – ... Faulty parameter in the EEPROM of the outdoor unit
11 – ... Fault on fan in outdoor unit
13 – ... Fault on compressor at start or operation
14 – ... Fault at the impulse amplitude modulation
17 – ... Incorrect electrical connection of the device with open electric circuit
18 – ... Incorrect electrical connection of the device with short circuit
19 – ... Fault on fan of the indoor unit
20 – ... Faulty parameter in the EEPROM of the indoor unit
24 – ... Communication error of the indoor unit with the WLAN
26 – ... Fault on a thermistor of the indoor unit
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 has tripped. ▶ Check power connection.
▶ Check RCD.
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.
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