Honeywell 7800 Series Manual page 50

RM7838B
TROUBLESHOOTING
TABLE 12—HOLD AND FAULT MESSAGE SUMMARY (Continued)
Annunciation Message
Fault 18
*Flame Detected*
Fault 19
*Main Flame Ign.*
Fault 20
*Low Fire Sw. Off*
Fault 22
*Lockout ILK*
Fault 24
*Call Service*
Fault 25
*Call Service*
Fault 26
*Man-Open Sw. Off*
Fault 27
*Start Switch On*
Fault 28
*Pilot Flame Fail*
Fault 29
*Lockout ILK*
Fault 31
*Low Fire Sw. Off*
Fault 33
*Preignition ILK*
Fault 35
*Call Service*
Fault 36
*Call Service*
Fault 37
*Call Service*
Fault 38
*Call Service*
Fault 40
*Call Service*
Fault 41
*Main Valve On*
Fault 42
*Pilot Valve On*
Fault 43
*Ignition On*
Fault 45
*Low Fire Sw. Off*
Fault 46
*Flame Amp Type*
Fault 47
*Jumpers Changed*
65-0120—1
System Failure
Flame sensed when shutter opened and no flame is expected during PURGE .
Flame was lost during MFEP or the first ten seconds of the RUN state.
Low Fire Interlock Switch failure to close during PURGE.
Lockout Interlock fault during PURGE.
Internal fault. Flame Interlock was on when it should be off.
Internal fault. Flame Interlock was off when it should have been on.
The MOS Switch was off when it should be on.
Start Switch was on when it should be off. Possible jumpered or welded Start Switch.
Pilot flame failure during Pilot Flame Establishing Period.
Lockout Interlock fault.
Low Fire Interlock failure to close during run.
Preignition Interlock fault.
Internal fault. Safety relay was off when it should be on or internal fuse has blown.
Internal fault. Main valve terminal was off when it should be on.
Internal fault. Pilot (ignition) valve terminal was off when it should be on.
Internal fault. Ignition terminal was off when it should be on.
Internal fault. Safety relay was on when it should be off.
Main valve terminal was on when it should be off.
Pilot (ignition) valve terminal was on when it should be off.
Ignition terminal was on when it should be off.
Low Fire Interlock Switch failed to close or stay closed.
Either Flame Failure Response Time or type of amplifier input from the amplifier
changed while the device was powered. Could also occur if pilot (ignition) valve
hold input terminal T16 is on and non shutter-check detector/amplifier is used.
One or all of the configuration jumpers were changed from original configuration
after 200 hours of operation.
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