Coleman PxXU-V series Installation Instructions Manual page 38

3 FLASH: This indicates the normally open pressure switch
contact did not close at the beginning of the heat cycle. This
could be caused by a number of problems; faulty inducer,
blocked vent pipe, high winds at vent terminal, broken pres-
sure switch hose or faulty pressure switch.
4 FLASH: This indicates that a primary limit, or auxiliary limit,
or rollout limit switch has opened its normally closed contacts.
With this fault code the control will operate the supply air
blower and the ventor. This condition may be caused by: dirty
filter, improperly sized duct system, incorrect blower speed
setting, incorrect firing rate or faulty blower motor. The rollout
control is manually reset. If it has opened, check for proper
combustion air, proper inducer operation, primary heat
exchanger failure or burner problem. Be sure to reset the
switch after correcting the failure condition.
6 FLASH: This indicates that after the unit was operating, the
pressure switch opened 5 times during the call for heat. This
could be caused by a number of problems; blocked vent or
chimney, faulty inducer, cracked pressure switch hose. The
ignition control will lock-out after the pressure switch opens 5
times.
7 FLASH: This fault code indicates that flame could not be
established. This no-light condition occurred 3 times during
the call for heat before locking out. This may be caused by
low gas pressure, faulty gas valve, faulty hot surface igniter,
reversed line polarity, or burner problem.
8 FLASH: This fault is indicated if the flame is lost 5 times
during the heating cycle.This could be caused by low gas
pressure or faulty gas valve. The ignition control will lock-out
if the flame is lost 5 times.
38
LED ON CONSTANTLY: This indicates an internal fault in the
furnace control discovered during its self-check procedure.
Replace the control.
60 MINUTE AUTOMATIC RESET FROM LOCKOUT:
control includes a watchdog type circuit that will reset from a
lockout condition after 60 minutes. This provides protection to
an unoccupied structure if a temporary conditions exists
causing a unit malfunction. An example would be a low
incoming gas supply pressure condition preventing unit oper-
ation. When the gas pressure was restored, at some point the
watchdog would restart the unit and provide heat for the
house.
NOTE: The control will blink one time when initially powered.
This is normal and not an indication of any malfunction.
RESET FROM LOCKOUT: To reset the control from any
lockout condition break the line voltage supply or 24 volt sig-
nal from the thermostat for 30 seconds.
Do not try to repair controls. Replace defective con-
trols with Source 1 Parts.
Never adjust pressure switch to allow furnace oper-
ation.
Never jump pressure switch or rewire in an attempt
to allow furnace operation. To do so will allow fur-
nace to operate under potentially hazardous condi-
tions.
035-17468-001 Rev. A (801)
This
Unitary Products Group