Troubleshooting Guide - Trane X13511542010 User Manual

Troubleshooting Guide

Auxiliary heat does not operate
Heat pump does not operate in
heating mode
BAS-SVU10C-EN
Symptom
Wrong mode selected
Thermostat in Unoccupied mode
Anticycle delay active
Heating setpoint is satisfied
High Balance point attained
Heating lockout attained
Wiring error
Wrong mode selected
Thermostat in Unoccupied mode
Anticycle delay active
Heating setpoint is satisfied
Low Balance point attained
Heating lockout attained
Wiring error
Wrong reversing valve configuration
Possible Cause
Select emergency heat mode
Select Occupied Hold in Schedule hold or
Override to force the thermostat
Occupied heating setpoint
Wait, the anticycling period will end and
the equipment will start
Raise the Heating setpoint
Mode is locked out based on outside air
temperature
Change configuration parameter High BP
to value 90°F (32°C) to by-pass lockout
Mode is locked out based on outside air
temperature
Change configuration parameter H
Lock to value 120°F (49°C) to by-pass
lockout
Start the Fan by forcing the Fan ON mode
Put a jumper across terminals RH and W1.
The heating should come ON. If it does
not, verify wiring and check if a jumper is
required between RC and RH
Select heating mode
Select Occupied Hold in Schedule hold or
Override to force the thermostat
Occupied heating setpoint
Wait, the anticycling period will end and
the equipment will start
Raise the Heating setpoint
Mode is locked out based on outside air
temperature
Change configuration parameter Low BP
to value -12°F (-24°C) to by-pass lockout
Mode is locked out based on outside air
temperature
Change configuration parameter H Lock
to value 120°F (49°C) to by-pass lockout
Start the Fan by forcing the Fan ON mode
Put a jumper across terminals RH and W1.
The heating should come ON. If it does
not, verify wiring and check if a jumper is
required between RC and RH
Wrong selection of parameter Re Valve
Select O will energize the valve in cooling
operation. Valve is normally heat.
Select B will energize the valve in heating
operation. Valve is normally cool.
Corrective Action
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