Fan Speed Has Been Out Of Control (E3 / F5) - Bosch Climate 5000 Series Service Manual

4 6 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Outdoor Unit

8.4 Fan speed has been out of control (E3 / F5)

Error Code
Malfunction decision conditions
Supposed causes
Table 25
Troubleshooting:
Power off, then restart the
unit 2 minutes later
Shut off the power supply,
Rotate the fan by hand.
Check the wiring of fan
Measure the
voltage from the main
Replace the fan motor
Figure 39
Data subject to change
E3 (indoor) / F5 (outdoor)
When indoor / outdoor fan speed is too low or too high for certain time, the unit will stop and the LED
will display the failure.
Wiring mistake
Indoor / Outdoor Fan assembly faulty
Indoor / Outdoor Fan motor faulty
Indoor / Outdoor PCB faulty
Yes
Yes
motor
Yes
fan motor
PCB
Yes
No The unit operates normally.
Find out the cause and have
No
it solved
Correct the connections.
No
No Replace the main PCB
No
Service Manual
04.2020 | Bosch Thermotechnology Corp.