TROUBLESHOOTING
60
Refer to the Troubleshooting Chart in the back of this manual
for assistance in determining the source of unit operational
problems.
• - A control lockout resulting from an external fault sensed
by the control, such as an unsuccessful recycle or retry
period, or a limit trip. Once in External Lockout, the
control will shut down for a period of one hour before
attempting another trial for ignition.
• - A failure internal to the control board.
To retrieve fault codes, push and release the “LAST ERROR”
button for more than 1/5 second and less than 5 seconds (the
LED will indicate this period by solid GREEN for 1/5 second
beginning with the most recent. If there are no fault codes
If multiple faults exist there will be 2 seconds between codes.
Solid LED error codes will not be displayed.
To clear the fault code memory, push and hold the “LAST
ERROR” button for more than 5 seconds and less than 10
seconds (the LED will indicate this period by RAPID GREEN
The ignition control is equipped with a momentary push
button switch that can be used to display on the diagnostic
must be in Standby Mode (no thermostat inputs) to use the
feature.
Depress the push button switch for approximately 2
most recent fault to the least recent fault.
Furnace lockout results when a furnace is unable to achieve
ignition after three attempts during a single call for heat. It is
diagnostic LED code. If the furnace is in “lockout”, it can be
reset in any of the following ways.
1. Automatic reset. The integrated control module will
automatically reset itself and attempt to resume normal
operations following a one hour lockout period.
2. Manual power interruption. Interrupt 115 volt power to
the furnace for 1 - 20 seconds.
3. Manual thermostat cycle. Lower the thermostat so that
there is no longer a call for heat then reset to previous
setting. Interrupt thermostat signal to the furnace for
1 - 20 seconds.
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