Blinking Fault Codes . . . (continued)
Fault Code
System Failure
Code 4-1
*Purge CardProblem*
No purge card or the purge card
timing has changed from the original
configuration.
a . Make sure the purge card is seated
properly .
b . Inspect the purge card and the connector
on the relay module for any damage or
contaminants .
c . Reset and sequence the relay module .
d . If the fault code reappears, replace the
purge card .
e . Reset and sequence the relay module .
f . If the fault code persists, replace the relay
module .
Code 4-2
*Wiring Problem/Internal Fault*
Pilot (ignition) valve terminal, main valve,
ignition or Main Valve 2 was on when it
should be OFF .
WARNING:
Electrical Shock Hazard; Fire
or Explosion Hazard . Can cause severe injury,
death or property damage . Remove system
power and turn off power supply.
a. Remove system power and turn off fuel
supply .
b . Check wiring; correct any errors .
c . Inspect Pilot Fuel Valve(s), both places, and
connections .
d . Reset and sequence the relay module .
e . If the fault persists, replace the relay
module .
Code 4-3
*Flame Amplifier Problem*
Flame not sensed, sensed when it should
be ON or OFF .
a . Check wiring; correct any errors .
b. Make sure the flame amplifier and flame
detector are compatible .
c. Remove the flame amplifier and inspect the
connections. Reseat the amplifier.
d . Reset and sequence the relay module .
e. If the code reappears, replace the flame
amplifier and/or the flame detector.
f . If the fault persists, replace the relay module .
Code 4-4
*Configuration Jumper Problem*
The configuration jumpers differ from the
sample taken at startup .
a . Inspect the jumper connections . Make
sure the clipped jumpers were completely
removed .
b . Reset and sequence the relay module .
c . If the fault persists, replace the relay
module .
Code 5-1
*Preignition Interlock*
Preignition Interlock fault .
a . Check wiring and correct any errors .
b . Check Preignition Interlock switches to
assure proper functioning .
c . Check fuel valve operation .
d . Reset and sequence the relay module;
monitor the Preignition Interlock status .
e . If the fault persists, replace the relay
module .
IM 684-6 • ROOFTOP SYSTEMS 32 www .DaikinApplied .com
Fault Codes
