Submittal Sheet

7800 SERIES S7800A2142 KEYBOARD DISPLAY MODULE
19 32-00110—05
Fault 9
*Flame Detected*
Flame sensed when no flame
is expected during STANDBY.
1. Check that flame is not present in the combustion cham-
ber; correct any errors.
2. Check wiring and correct any errors. Make sure that flame
sensor wires are in separate conduits. Check for noise
coupling into flame detector leadwires.
3. Remove the flame amplifier and inspect its connections.
Reset the amplifier.
4. Reset and sequence the relay module.
5. If the code reappears, replace the amplifier and/or the
flame detector.
6. If the fault persists, replace the flame detector.
7. If the fault persists, replace the relay module.
Fault 10
*Pre-Ignition ILK*
Pre-Ignition Interlock fault
during STANDBY
1. Check wiring and correct any errors.
2. Check Pre-Ignition Interlock switches to assure proper
functioning.
3. Check fuel valve operation.
4. Reset and sequence the relay module; monitor the Pre-
Ignition Interlock status.
5. If the code persists, replace the relay module.
Fault 11
*Running ILK On*
Running Interlock powered at
improper sequence point.
1. Check wiring to make sure that interlocks are connected
properly between terminals 6 and 7. Correct any errors.
2. Reset and sequence the relay module.
3. If the fault persists, measure the voltage between terminals
6 and L2(N) (ground), then terminals 7 and L2(N). If there
is line supply voltage present at terminal 6 when the con-
troller is off, the controller switch may be bad or jumpered.
4. If steps 1 through 3 are correct and there is line supply
voltage present at terminal 7 when the controller is closed
and the fault persists, check for a welded or jumpered Run-
ning Interlock, Lockout Interlock, or Airflow Switch. Correct
any errors.
5. If steps 1 through 4 are correct and the fault persists,
replace the relay module.
Fault 12
*Lockout ILK On*
Lockout Interlock powered at
improper sequence point.
Fault 13
*Airflow Sw. On*
Combustion airflow interlock
fault during STANDBY.
Fault 14
*High Fire Sw.*
High Fire Interlock Switch
failure to close during
PREPURGE.
1. Check wiring and correct any errors.
2. Reset and sequence the relay module.
3. Use either the manual motor potentiometer to drive the
motor to the High Fire position or use the Run/Test Switch
option, if available. Sequence to Prepurge drive to High Fire
and place in the Test position. Adjust the High Fire Switch
while in this state to make sure that it closes properly.
4. Measure the voltage between terminal 19 and L2(N) while
in the Prepurge drive to High Fire state. Line supply voltage
should be present. If not, the switch adjustment is incorrect
and/or the switch is defective and needs replacing.
5. Reset and sequence the relay module. If the line supply
voltage was present between the High Fire Switch and
terminal 19, and the fault still persists, replace the relay
module.
Fault 15
*Flame Detected*
Flame sensed when no flame
is expected during STANDBY.
1. Check that the flame is not present in the combustion
chamber; correct any errors.
2. Make sure that the flame amplifier and flame detector are
compatible.
3. Check wiring and correct any errors.
4. Remove the flame amplifier and inspect the connections.
Reset the flame amplifier.
5. Reset and sequence the relay module.
6. If the code reappears, replace the amplifier and/or the
flame detector.
7. If the fault persists, replace the relay module.
Table 5. Fault Message Summary. (Continued)
Fault Code System Failure Recommended Troubleshooting