P0 Troubleshooting - Bosch IDS 2.0 Service Manual

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12.3.9 P0 Troubleshooting

LED display output:
Description:
Possible causes:
Table 37
Procedure:
Figure 24
1) See Section 13.6
2) SeeSection 13.4
3) See Appendix 1
Data subject to change
P0
Control board is over-heated
 Poor heat dissipation, causing control board to overheat
 Tf sensor failed
 Wrong connection on control board of T5&Tf (common cause)
 Outdoor motor failed, causing control board to overheat
Yes
Is there poor heat
dissipation?
No
Yes
Did the outdoor fan
motor fail?1
No
Are T5 and Tf
No
connections at
control board
correct?
Yes
Yes
Did the Tf sensor
fail?2
No
Yes
Did the control
board fail?3
No
Restart the system
Refer to control board
replacement instructions
Correct/Replace motor
Correct T5 and Tf
connections
Replace Tf sensor
Replace the control board
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