Open Circuit Or Short Circuit Of Temperature Sensor (E4 / E5 / F1 / F2 / F3 / P7) - Bosch Climate 5000 Series Service Manual

4 8 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Outdoor Unit
8.5 Open circuit or short circuit of temperature sensor
(E4 / E5 / F1 / F2 / F3 / P7)
Error Code
Malfunction decision conditions
Supposed causes
Table 28
Troubleshooting:
Figure 42
Figure 43
Data subject to change
E4/E5/F1/F2/F3
If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure.
Wiring mistake
Sensor faulty
Indoor / Outdoor PCB faulty
Check the connection
between temperature
sensor and PCB.
Yes
Measure the resistance value
of the sensor and compare to
the values in Appendix 1
(pg.83) and Appendix 2
(pg.84). Does the reading
agree with the table?
Yes
Replace indoor or outdoor
main PCB
Correct the connection
No
Rep a l ce the sensor
No
Some models, PCB could not removed separately, then entire outdoor
electric control box should be replaced.
Service Manual
04.2020 | Bosch Thermotechnology Corp.