Bosch Climate 5000 Series Service Manual page 43

Service Manual
Remark:
Use a multimeter to test the DC voltage between 2 port and 3 port of
outdoor unit. The red pin of multimeter connects with 2 port while the
black pin is for 3 port.
When AC is normal running, the voltage will move alternately between
-25VDC to 25VDC.
If the outdoor unit has malfunctioned, the voltage will move alternately
with positive value.
While if the indoor unit has malfunction, the voltage will be a certain
value.
Figure 34
Figure 35
Bosch Thermotechnology Corp. | 04.2020
Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Outdoor Unit | 43
Remark:
Use a multimeter to test the resistance of the reactor which does not
connect with capacitor.
The normal value should be around zero ohms. Otherwise, the reactor
must have malfunctioned and may need to be replaced.
Data subject to change