Honeywell 7800 SERIES

65-0120—1 46
TABLE 11—SELECTABLE MESSAGES (SEE TABLE 4).
Selectable Message/ Possible States/Range
Display Description (Terminals) Comments
Flame Signal Flame signal 0 - 5.0 Vdc Flame relay pull-in and
strength. Flame Amp (+ drop-out value 1.25 Vdc.
and - (Com))
Total Cycles Total number 0 - 99,999 cycles A cycle will be updated
of equipment each time the main
operating cycles. valve is energized.
Total Hours Total number of 0 - 99,999 hours An hour will be updated
equipment operating each time the main valve
hours. output is energized for
60 minutes.
Fault History First level prompt for
(six most recent faults) history information.
Has subset level.
Fault Cycle H1 Cycle when 0 - 99,9999 cycles
fault occurred.
Fault Hours H1 Run hour when the 0 - 99,9999 hours
fault occurred.
Fault Code H1 Number that identifies 0 - 999
lockout reason.
*Fault Message* H1 Indicates lockout cause.
Sequence Message H1 Indicates where lockout
occurred in sequence.
(Second Line Message) H1 Explains further
information avail-
able from RM7838B
or may be blank
if no pre-emptive
second line.
H2…H6 etc. First level prompt for
Diagnostic Information history information.
Has subset level.
Device Device type RM7838Bx
number.
Device Suffix Device suffix nnnn
number.
Run/Test Sw. Position of RUN or TEST
Run/Test Switch.
OperControl T6 Recirculates ON or OFF Indicates if input is on
AFS/limits (energized) or off
Stop Switch input. (de-energized.)
Interlock T7 Running/Lockout ON or OFF Indicates if input is on
Interlock. (energized) or off
(de-energized.)
Pilot Valve T8 Pilot Valve. ON or OFF Indicates if output term-
inal is on (energized) or
off (de-energized.)
Main Valve T9 Main Fuel Valve. ON or OFF Indicates if output term-
inal is on (energized) or
off (de-energized.)
(continued)
RM7838B
TROUBLESHOOTING