Bosch IDS BOVA60-15 - Troubleshooting H8 Error Code; Troubleshooting P0 Error Code

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Installation Instructions
Bosch IDS BOVA15 Split System Heat Pump - BTC 761701317 A (02.2022)
Figure 49
H8 (Pressure transducer (PT) fault)
Did the control board fail? Replace control board
Correct wiring
Restart system
Replace pressure
transducer
Is the pressure
transducer (PT) connected
correctly
Yes
No
Yes
No
Yes
No
Run
unit in cooling
or heating mode. Is the
suction pressure within 50 PSI
of checkpoint No.9
(cooling) or No.10
(heating)?
WARNING: HAZARDOUS VOLTAGE
 When measuring resistance , make sure the unit is powered
off and wait 3 min before taking measurement.
Figure 50
P0 (Control board is over-heated)
Did the outdoor
fan motor fail?
Refer to control board
replacement instructions to
ensure there is good contact
between the heat sink
and control board. Ensure
there is no debris
blocking the radiator.
Replace motor
Replace control board
Restart system
Is
there dust or
debris blocking the
control board heat
sink?
Yes
No
Yes
Yes
No
No
Yes
No
Tighten the screws and/or
apply silicone grease
Are
the screws
properly installed and/
or is there enough
silicone grease?
Did the control
board fail?