Installation Instructions
Bosch IDS BOVA20 & BOVC20 Split System Heat Pump - BTC 761703109 A (12.2023)
38 |
WARNING: HAZARDOUS VOLTAGE
• When measuring resistance , make sure the unit is powered
off and wait 3 min before taking measurement.
Figure 64
AtL (Ambient Temperature Limited Condition)
Is the
ambient temperature
beyond operating range?
Cooling mode: 15-125°F
Heating mode: -4-86°F
Is the
thermostat set to
energize O/B in heating
mode?
Is the resistance of T4
in the range of Table 15?
No service required.
Wait for temperature
to be within range
Correct thermostat
setting
Replace T4 sensor
Restart system
Is the
T4 sensor seated
correctly?
Refer to wiring
diagram for
correct wiring
Yes
No
Yes
No
No
Yes
No
Yes
To Next Page
Loading...
