Bosch Climate 5000 Series Service Manual page 45

Service Manual
8.6.4 Open circuit or short circuit of temperature sensor
(E4 (outdoor) / F1 / F2 / F3 / F4/ F5 (indoor))
Error Code
Malfunction decision conditions
Supposed causes
Table 22
Troubleshooting:
Figure 49
Figure 50
Bosch Thermotechnology Corp. | 08.2020
Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units | 45
E4 (outdoor) / F1, F2, F3, F4, F5 (indoor)
If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure.
Improper / Incorrect Wiring
Sensor faulty
Indoor / Outdoor PCB faulty
Check the connections
between temperature
sensor and PCB.
the connections correct?
Yes
Check the resistance value
of the sensors via Appendix 1
and Appendix 2
Is it normal? Yes
No
Replace the sensor
No Correct the connections.
Replace indoor or outdoor PCB.
Data subject to change