Installation Instructions
Bosch IDS BOVA20 & BOVC20 Split System Heat Pump - BTC 761703109 A (12.2023)
36 |
WARNING: HAZARDOUS VOLTAGE
• When measuring resistance , make sure the unit is powered
off and wait 3 min before taking measurement.
Figure 60
P5 (Condenser coil temperature (T3) protection in cooling)
Restart System
Is the
resistance of T3
in range of Table
15?
Replace T3 sensor
Are
you running in force
mode?
Quit force mode
Is there abnormal
pressure in the
system?
Are the service valves
open?
Open the service valves
Yes
No
Yes
Yes
No
No
Yes
No
Is the
ambient temperature
>120°F?
Clear any blockage in the
refrigerant,Correct poor
heat exchange (air flow
restriction, motor failure)
Is the system
overcharged?
Adjust refrigerant
No
Yes
Yes
No
Figure 61
P8 (DC outdoor fan motor protection)
Are outdoor
weather conditions
preventing the fan from
operating
normally?
Did th e motor fail?
Power off until
severe weather
conditions subside
Replace motor
Restart system
Yes
No
Yes
No
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