BAS-SVU10C-EN 25
Troubleshooting Guide (All Models)
Symptom Possible Cause Corrective Action
No display on the thermostat
Absent or incorrect supply voltage
Check power supply voltage
between C and RC
to be from 19-30
Vac
Check for tripped fuse or circuit
break
er
Overloaded power transformer
Verify that the transformer used is
power
ful enough (enough VA’s) to
supply all controlled devices
including the thermostat
Keyboard menu does not access all
func
tions
Keyboard locked
Change configuration parameter
L
OCK
OUT to value “0” to access all
levels of the menu
Temperature setpoints revert to
or
igin
al value after a certain time
period
Temporary setpoint option selected
The thermostat needs to be in
P
erm
anent setpoint mode for the
new setpoint to be kept and memory
and used all the time
Go to the Set temperature menu.
The last prompt is setpoint type. Set
i
t to Pe
rmanent setpoint
Thermostat will not call for heating
Wrong mode selected Select heating mode
Thermostat in Unoccupied mode
Select Occupied Hol
d in Schedule
ho
ld or Override to force the
thermostat Occupied heating
setpoint
Anticycle delay active
Wait, the anticycling period will end
a
nd th
e equipment will start
Heating setpoint is satisfied Raise the Heating setpoint
Heating lockout attained
Mode is locked out based on outside
air temper
ature
Change 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 terminals RH
and
W1. The h
eating should come
ON. If it does not, verify wiring and
check if a jumper is required
between RC and RH
Thermostat will not c
all for cooling
W
rong mode selected Select cooling mode
Thermostat in Unoccupied mode
Select Occupied Hol
d in Schedule
ho
ld or Override to force the
thermostat Occupied cooling
setpoint
Anticycle delay active
Wait, the anticycling period will end
and th
e equipment will start
Cooling setpoint is satisfied Lower the cooling setpoint
Cooling lockout attained
Mode is locked out based on outside
ai
r temper
ature
Change configuration parameter C
Lock to va
lue -40°F (-40°C) to by-
pass lockout
Wiring error
Start the Fan by forcing the Fan ON
mode
Put a jumper across terminals RC
and
Y1. The
cooling should come
ON. If it does not, verify wiring
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