Trane X13511542010 - Auxiliary Heat and Heat Pump Heating Problems

BAS-SVU10C-EN 27
Troubleshooting Guide
Symptom Possible Cause Corrective Action
Auxiliary heat does not operate
Wrong mode selected Select emergency heat mode
Thermostat in Unoccupied mode
Select Occupied Hold in Schedule hold or
Over
ride to force the thermostat
Occupied heating setpoint
Anticycle delay active
Wait, the anticycling period will end and
the equipm
ent will start
Heating setpoint is satisfied Raise the Heating setpoint
High Balance point attained
Mode is locked out based on outside air
temperature
Ch
ange configuration parameter High BP
to valu
e 90°F (32°C) to by-pass lockout
Heating lockout attained
Mode is locked out based on outside air
temper
ature
Ch
ange configuration parameter H
Lock to value 120°F (49°C) to by-pass
lockout
Wiri
ng error
Start the Fan by forcing the Fan ON mode
Put a jumper across terminals RH and W1.
The he
ating should come ON. If it does
not, verify wiring and check if a jumper is
required between RC and RH
Heat pump does not operate in
he
ating mode
W
rong mode selected Select heating mode
Thermostat in Unoccupied mode
Select Occupied Hold in Schedule hold or
Over
ride to force the thermostat
Occupied heating setpoint
Anticycle delay active
Wait, the anticycling period will end and
the equipm
ent will start
Heating setpoint is satisfied Raise the Heating setpoint
Low Balance point attained
Mode is locked out based on outside air
temperature
Ch
ange configuration parameter Low BP
to val
ue -12°F (-24°C) to by-pass lockout
Heating lockout attained
Mode is locked out based on outside air
temper
ature
Ch
ange configuration parameter H Lock
to value
120°F (49°C) to by-pass lockout
Wiring error
Start the Fan by forcing the Fan ON mode
Put a jumper across te
rminals 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 reversing valve configuration
Wrong selection of parameter Re Valve
Select O will energize the valve in cooling
op
eration.
Valve is normally heat.
Select B will energize the valve in heating
operation. Valv
e is normally cool.