48
TC5-1V6SA.rev.06
The display
shows
sudden
variations in
the room
temperature.
A variation in resist-
ance is induced on a
probe.
There is electrical
noise near an ex-
tended probe cable.
Make sure the probes are dry
and move them away from
drafts and sources of radiant
heating.
Do not run probe cables next to
other power cables. When
crossing other power cables,
cross at 90
o
.
TROUBLESHOOTING GUIDE
PROBLEM
CAUSE
SOLUTION
The Defective
Probe Pilot
Light is on.
One or more probes
are defective.
Follow the procedure described
in DEFECTIVE PROBES to
identify and replace the defec-
tive probe.
The display board
interconnect cable is
unplugged from the
power supply board.
The voltage selector
switch is in the wrong
position.
The input fuse is
open.
The circuit breaker on
the service panel is off
or tripped.
The display
doesn't work.
Reset the circuit breaker.
Replace the fuse.
Set the switch to the correct
position.
Plug the cable.
The display
shows the
letter "P"
Probe # 1 is improp-
erly connected.
Fix the probe's connection.
The wiring is incorrect.
Fix the wiring.