Compressor - Bosch IDS 2.0 Service Manual

Service Manual

13.8 Compressor

Restart unit, give call for
heating/cooling, wait 5 mins
Does
compressor appear
to be running properly
(i.e. no abnormal
noise)?
No
Is the power supply
172V-270V?
Yes
Is there 24VAC
between Y&C on
control board
Yes
Is the voltage
between P-N
(CN3)< 310V DC?
No
Is the refrigerant
charge correct?
Yes
Power off and unplug
compressor wires, measure
resistances (see Table 1)
Yes
Are
resistances correct
according to Table 1? (Resistance
values can change +/-0.5 ohms
depending on equipment
& temperature)
Yes
Is there an active
fault code?
No
Replace compressor
Figure 45
Bosch Thermotechnology Corp. | 07.2021
Yes
No service required
No
Correct power supply/call
utility provider
No
Fix thermostat
Yes
Replace control board
No
Check superheat and
subcool. Correct refrigerant
charge according to IOM
No
Replace compressor
Yes
Follow fault code specific
troubleshooting steps
Bosch IDS 2.0 | 71
Resistance (Ω) 3T
Between U and V <1.5
Between V and W <1.5
Between W and U <1.5
Between U/V/W and ground >10M
Data subject to change
5T
<1
<1
<1
>10M