Troubleshooting; Faults With Indication; Faults Without Indication - Bosch Climate Class 8000i Series Installer's Manual

Troubleshooting

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.
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 – ... Overloading from insufficient refrigerant or blocked air inlet/outlet. Fault at IPM module or overcurrent protection of the
07 – ... 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
Table 9
5.2

Faults without indication

Error
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.
Table 10
46
A fault on the device can also be indicated by the sequential flashing of
the following lights:
• ON indicator K (green)
• Timer lamp
• WLAN lamp
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
WLAN light
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
Possible Cause
Heat exchanger of outdoor or indoor unit soiled. ▶ Clean heat exchanger of outdoor or indoor unit.
Lack of refrigerant
No power
RCD has tripped.
Insufficient refrigerant in the system.
Too much refrigerant in the system.
Moisture or impurities in the refrigerant circuit.
Voltage fluctuations too high.
Defective compressor.
(orange)
(green)
(green) flashes 4 times. As an alternative, the fault code
code and appliance.
Remedy
▶ Check tightness of pipes, reseal if required.
▶ Refill refrigerant.
▶ Check power connection.
▶ Power on the indoor unit.
▶ Check power connection.
▶ Check RCD.
▶ 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 Class 6000i/8000i – 6721831489 (2022/11)
(orange) flashes 3 times and the