PEC Plus user manual Appendix B: Troubleshooting
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Troubleshooting
The following table lists some problems, possible causes, and possible solutions. If you are having a
problem using your PEC Plus, see if the problem is described in the Troubleshooting table and then
follow the directions for correcting the problem.
Problem Possible cause Possible solution
The display shows Pin
when trying to program the
control
PIN security is enabled
Enter the correct PIN. For more
information, read
Entering a PIN on
page 8.
Power supply components
blown out
Burn marks on boards and
components
Motors and fans slow down
or stop
Power surge, brownout, or
power outage
Avoid the problem in future by
providing proper voltage and
protection for the control.
A circuit breaker at service panel
is off or tripped.
Reset the circuit breaker.
Incorrect wiring Correct the wiring.
The display board connect cable
is not plugged into the control
board properly.
Plug in the display board cable. For
more information, read
PEC Plus
layout
on page 13.
No power and/or display
The 115/230 VAC switch is in the
wrong position
Switch off the power, set the switch
to the correct setting, and then
switch on the power. For more
information, read
PEC Plus layout
on page 13.
There are no working
temperature probes enabled or
connected
Make sure at least one working
probe is enabled. For more
information, read
Configuring
temperature probes
on page 31.
Temperature does not
change
The control is in temperature
test mode.
If the TEST LED is on, the control is
in test mode. Exit test mode. For
more information, see
Using
temperature test mode
on page
64.
If you have more than one probe
connected, press buttons 1 to 4 to
determine which probe is causing
the high or low reading.
The probe is not a Phason
probe.
Remove the probe and then install a
Phason probe.
The extension cable connected
to the temperature probe is
providing a poor connection
Check the extension cable
connection. Resolder it if necessary.
Display showing unusually
high or low temperature
Damaged probe Replace the temperature probe.
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