PG80VTLA: Installation, Start-up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
47
TROUBLESHOOTING GUIDE
A14311a
Is AMBER LED status light on?
Is there 24V at SEC-1 and SEC-2?
Is there 115V at L1 and L2?
Replace furnace control.
Is door switch closed?
Replace transformer.
Replace door switch.
Is there 115V going to switch?
Is door switch closed?
Is circuit breaker closed?
Check for continuity in wire from circuit
breaker to furnace.
Close circuit breaker and go back to
START.
Is AMBER LED status light blinking
rapidly without a pause?
Check for correct line voltage polarity. If
units are twinned, check for proper low-
voltage (24V) transformer phasing.
Is AMBER LED status light blinking
ON/OFF slowly with a combination of
short and long flashes?
Determine status code. The status code
is a 2 digit number with the first digit
determined by the number of short
flashes and the second digit by the
number of long flashes?
To recall previous status codes disconnect the R
thermostat connection, reset power, and put setup
switch SW1-1 in the ON position. The AMBER LED
will flash the status codes in the order of occurrence.
Record status codes until status code #11 flashes (1
short and 1 long flash). After status code #11
flashes the status codes will repeat. Status codes
are erased after 72 hours or can be manually erased
by putting setup switch SW1-1 in the ON position
and jumpering R, W/W1, and Y/Y2 simultaneously
until status code #11 is flashed. When done put
setup switch SW1-1 in the OFF position.
Was there a previous status code other
than #11?
Go to section below for the status code
that was flashed.
Does the control respond to W/W1, W2,
Y1, Y/Y2, and G (24V) thermostat
signals?
Run system through a low-heat, high-
heat, or cooling cycle to check operation.
Status codes are erased after 72 hours
or can be manually erased by putting
setup switch SW1-1 in the ON position
and jumpering R, W/W1, and Y/Y2
simultaneously until status code #11 is
flashed.
Is 24V present at W/W1, W2, Y1, Y/Y2 or
G thermostat terminals on the furnace
control?
Check room thermostat or
interconnecting cable.
Disconnect all the thermostat wires from
the furnace control.
Does the problem repeat when using a
jumper wire?
Replace furnace control.
The thermostat is not compatible with the
furnace control. Either install a ballast
resistor, connect the Com24V thermostat
terminal to the thermostat, or replace the
thermostat.
YES
NO
YES
YES
YES
YES
YES
YES YES YES
YES
START
YES
YES
NO
NO
NO
NO NO
NO
NO NO
NO
NO
NO
Troubleshootin
Guide – Variable Speed
11 NO PREVIOUS CODE – Status codes are erased after
72 hours or can be manually erased by putting setup
switch SW1-1 in the ON position and jumpering R,
W/W1, and Y/Y2 simultaneously until status code #11
is flashed. Run system through a low-heat, high-heat,
or cooling cycle to check system.
12 BLOWER ON AFTER POWER UP – (115V OR 24V) –
Normal operation. Blower runs for 90 seconds, if unit is
powered up during a call for heat (R-W/W1 closed) or
when (R-W/W1 opens) during the blower on-delay
eriod.
13 LIMIT CIRCUIT LOCKOUT – Lockout occurs if the limit,
draft safeguard, flame rollout, or blocked vent switch (if
used) is open longer than 3 minutes or 10 successive
limit trips occurred during high-heat. Control will auto-
reset after 3 hours. See code 33.
14 IGNITION LOCKOUT – System failed to ignite gas and
prove flame in 4 attempts. Control will auto-reset after
3 hours. See status code 34.
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