Honeywell 7800 Series Manual page 10

7800 SERIES RELAY MODULES
Fault Code
Fault 1 No card is plugged into the
*No Purge Card* purge card slot.
Fault 2 Excess noise or device
*AC Frequen/Noise* running on slow ac.
Fault 3 Ac line dropout detected.
*AC Line Dropout*
Fault 4 Device running on fast ac.
*AC Frequency*
Fault 5 Low ac line detected.
*Low Line Voltage*
Fault 6 Purge card timing changed
*Purge Card Error* since card was initially read.
Fault 7 Flame sensed when flame
*Flame Amplifier* not present.
Fault 8 Flame sensed when no
*Flame Amp/Shutr* signal expected during
shutter-check or Ampli-
Check™ versions.
Fault 9 Flame sensed when shutter
*Flame Detected* open and no flame is
expected during STANDBY.
Fault 10 Preignition Interlock fault
*Preignition ILK* during STANDBY
*EC/RM7800, 7840, 7838B
only).
65-0229—1
Table 3. Hold and Fault Message Summary.
System Failure
1.
2.
3.
4.
5.
6.
1.
2.
3.
4.
1.
2.
3.
4.
5.
6.
1.
2.
3.
4.
5.
6.
1.
2.
3.
4.
5.
6.
1.
2.
3.
4.
5.
Recommended Troubleshooting
Make sure the purge card is seated properly.
Inspect the purge card and connector on the relay module for
damage or contaminants.
Reset and sequence the relay module.
If the fault code reappears, replace the purge card.
Reset and sequence the relay module.
If the fault persists, replace the relay module.
Check the relay module and display module connections.
Reset and sequence the relay module.
Check the relay module power supply and make sure that both
frequency and voltage meet the specifications.
Check the backup power supply, as appropriate.
Make sure the purge card is seated properly.
Inspect the purge card and connector on the relay module for
damage or contaminants.
Reset and sequence the relay module.
If the fault code reappears, replace the purge card.
Reset and sequence the relay module.
If the fault persists, replace the relay module.
Check wiring and correct any errors. Make sure that flame
sensor wires are in separate conduits. Check for noise
coupling into the flame detector leadwires.
Make sure that flame detector and flame amplifier are
compatible.
Remove the flame amplifier and inspect connections. Reseat
the amplifier.
Reset and sequence the relay module.
If the code reappears, replace the amplifier and/or the flame
detector.
If the fault persists, replace the relay module.
Check that flame is not present in the combustion chamber;
correct any errors.
Check wiring and correct any errors. Make sure that flame
sensor wires are in separate conduits. Check for noise
coupling into flame detector leadwires.
Remove the flame amplifier and inspect its connections.
Reseat the amplifier.
Reset and sequence the relay module.
If the code reappears, replace the amplifier and/or the flame
detector.
If the fault persists, replace the relay module.
Check wiring and correct any errors.
Check Preignition Interlock switches to assure proper
functioning.
Check fuel valve operation.
Reset and sequence the relay module; monitor the Preignition
Interlock status.
If the code persists, replace the relay module.
10
(continued)