Troubleshooting; Faults With Indication; Faults Without Indication - Bosch Climate 9100i Manual

▶ Explain to the customer how to use the system, referring to the
operation manual.
▶ Advise the customer to carefully read the operation manual.
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, heat exchanger or IPM module 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
outdoor unit main PCB.
07 – ..
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
21 – .. Air baffle fitted incorrectly
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
Climate 9100i – 6721821569 (2020/11)
A fault on the device can also be indicated by the sequential flashing of
the following lights:
• ON indicator K (green)
• Timer lamp
• Plasmacluster lamp (blue)
The number of flashing signs specify the number of the fault codes.
For example in case of error 23 – 4 the green lamp flashes 2 times, then
the orange lamp flashes 3 times then the blue lamp 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 and provide the fault code and details of the
appliance.
Possible Cause
Heat exchanger of outdoor or indoor unit soiled. ▶ Clean heat exchanger of outdoor or indoor
Lack of refrigerant
No power
Fuse 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.
(orange)
Remedy
unit.
▶ Check tightness of pipes, reseal if required.
▶ Refill refrigerant.
▶ Check power connection.
▶ Power on the indoor unit.
▶ Check power connection.
▶ Replace 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.
Troubleshooting
7