Honeywell 7800 SERIES User Manual

65-0120—1 52
TABLE 13—EXPANDED ANNUNCIATOR HOLD CODES.
Annunciation Message Symbol System Holds
BURNER OFF: T6
(Burner Switch) EA Burner switch is open.
STANDBY HOLD: T6
(Aux. Limit #1) EA Auxiliary limit #1 is open.
STANDBY HOLD: T6
(Aux. Limit #2) EA Auxiliary limit #2 is open.
STANDBY HOLD: T6
(LWCO) EA Open low water cutoff.
STANDBY HOLD: T6
(High Limit) EA High limit (pressure or temperature) exceeded.
STANDBY HOLD: T6
(Aux. Limit #3) EA Auxiliary limit #3 is open.
STANDBY HOLD: T6
(FuelSelect Off) EA No fuel selected.
STANDBY HOLD: T6
(BothFuelSelect) EA Both fuels selected.
STANDBY HOLD: T6
(High Oil Pres.) EA Oil pressure is above high oil pressure limit.
STANDBY HOLD: T6
(Low Oil Pres.) EA Oil pressure is below low oil pressure limit.
STANDBY HOLD: T6
(High Oil Temp.) EA Oil temperature is above high oil temperature limit.
STANDBY HOLD: T6
(Low Oil Temp.) EA Oil temperature is below low oil temperature limit.
STANDBY HOLD: T6
(Atomizing Sw.) EA Atomizing Switch is open.
STANDBY HOLD: T6
(High Gas Pres.) EA Gas pressure is above high gas pressure limit.
STANDBY HOLD: T6
(Low Gas Pres.) EA Gas pressure is below low gas pressure limit.
STANDBY HOLD: T6
(Circuit Fault) EA Control input is not energized.
TABLE 14—EXPANDED ANNUNCIATOR FAULT CODES.
Annunciation Message Symbol System Faults
LOCKOUT nna
*Aux. Limit #1* EA Auxiliary limit #1 was open.
LOCKOUT nnb
*Aux. Limit #2* EA Auxiliary limit #2 was open.
LOCKOUT nnc
*LWCO* EA Open low water cutoff.
LOCKOUT nnd
*High Limit* EA High limit (pressure or temperature) was exceeded.
LOCKOUT nne
*Aux. Limit #3* EA Auxiliary limit #3 was open.
LOCKOUT nnf
*FuelSelect Off* EA No fuel selected.
LOCKOUT nng
*BothFuelSelect* EA Both fuels selected.
(continued)
RM7838B
TROUBLESHOOTING

Honeywell 7800 SERIES Specifications

General

Model	7800 SERIES
Category	Control Unit
Frequency	50/60 Hz
Approvals	UL, CE
Communication	Communication Interface (Optional)