Table of Contents
Advertisement
SMART THERMOSTAT
TROUBLESHOOTING GUIDE
PROBLEM
There is no display.
The display shows
the letter "P"
The Defective
Probe Pilot Light is
on.
The display shows
sudden variations
in the room or
outside
temperature.
30
SMART THERMOSTAT rev.01
CAUSE
The circuit breaker at the service
panel is off or tripped.
The wiring is incorrect.
The F10 fuse is open
The voltage selector switch is in
the wrong position.
The display board interconnect
cable is not properly plugged into
the power supply board.
The corresponding probe is
improperly connected.
One or more probes are defective.
A variation in resistance is
induced on a probe.
There is electrical noise near a
probe cable.
SOLUTION
Correct the problem and
reset the circuit breaker.
Correct the wiring.
Replace the fuse.
Set the switch to the correct
position.
Be sure the cable is firmly
plugged in.
Follow the procedure described in
the DEFECTIVE PROBES
section to identify and replace the
defective probe.
Follow the procedure described in
the DEFECTIVE PROBES
section to identify and replace the
defective probe.
Make sure the probes are dry and
move them away from drafts and
sources of radiant heating.
Isolate the probe cables from all
high voltage sources. Do not
route probe cables and other
power cables through the same
electrical knockout. Do not run
probe cables next to other power
cables. When crossing other
power cables, cross at 90°.
Advertisement
Table of Contents
