49
TC5-1V10SA rev.06
The display
shows sud-
den varia-
tions in the
room tem-
perature.
A variation in resist-
ance is induced on a
probe.
There is electrical noise
near an extended 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 Defec-
tive Probe
Pilot Light is
on.
One or more probes
are defective.
Follow the procedure described
in DEFECTIVE PROBES to
identify and replace the defective
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 improperly
connected.
Fix the probe's connection.
The wiring is incorrect.
Fix the wiring.
