Specification Sheet

7800 SERIESS7800A2142 4Line LCD Keyboard Display Module
320011007 26
Fault Code System Failure
Fault 75
*Flame
Proven Feed-
back*
Flame Indication
Feedback (terminal 21)
either on when it should
be off or off when it
should be on.
Remove wire to terminal 21 and reset relay module.
If the fault persists, replace relay module.
Reconnect wire to terminal 21. If the fault returns, verify
wiring.
Faults 76–87
*Accessory
Fault*
Lockout requested by
ControlBus module.
-
Fault 88
*Accessory
Fault*
T17 powered without
Valve Proving feature
setup.
Follow Valve Proving Selection Setup in Appendix B on select-
ed Relay Module.
If No Valve Proving (NEVER) is required, connect controller
(Demand) to terminal 6.
Fault 89
*Accessory
Fault*
T6 and T17 powered at
the same time.
Correct wiring error
Fault 90
*Accessory
Fault*
T7 opens on RM7890
with VPS Feature.
Determine what interrupted terminal 7.
Correct any wiring issues.
Reset Relay Module.
Faults 91-93
*Accessory
Fault*
Lockout requested by
ControlBus module.
-
Fault 94
*Call Service*
Call service. -
Fault 95
*Relay mod-
ule self-test
failure*
Relay Module self-test
failure.
Reset and sequence the relay module.
If the fault reappears, remove power from the relay module
and
reapply the power; reset and sequence the relay module.
If the fault persists, replace the relay module.
Fault 96
*Flame cir-
cuit diagnos-
tic failure*
Flame circuit diagnos-
tic failure.
Reset and sequence the relay module.
If the fault reappears, remove power from the relay module
and
reapply the power; reset and sequence the relay module.
If the fault persists, replace the relay module.
Fault 97
*Over tem-
perature*
Device ambient tem-
perature limit exceeded.
Check ambient temperature and reduce to within specifica-
tions.
If the fault persists, replace the relay module.
Fault 98
*Flame cir-
cuit diagnos-
tic failure*
Flame circuit diagnos-
tic failure.
Reset and sequence the relay module.
If the fault reappears, remove power from the relay module
and
reapply the power; reset and sequence the relay module.
If the fault persists, replace the relay module
Fault 99
*Relay mod-
ule self-test
failure*
Relay Module self-test
failure.
Reset and sequence the relay module.
If the fault reappears, remove power from the relay module
and
reapply the power; reset and sequence the relay module.
If the fault persists, replace the relay module.
Fault 100
*EEPROM
not initial-
ized*
Relay Module EEPROM
is not initialized or is
corrupted.
Reset and sequence the relay module.
If the fault reappears, remove power from the relay module
and
reapply the power; reset and sequence the relay module.
If the fault persists, replace the relay module.
Fault 101
*Incompati-
ble subbase*
Installed subbase is
incompatible with this
relay module.
Check that the subbase matches the installed Relay module
series.
Replace the relay module with a compatible model.
Fault 102
*Valve
proving (VP)
EEPROM
error*
Valve proving config-
uration in EEPROM
is not initialized or is
corrupted.
Enter Setup and re-commission Valve proving settings.
If the fault persists, replace the relay module.