Automation and Control Solutions
Honeywell International Inc. Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9
customer.honeywell.com
® U.S. Registered Trademark
© 2005 Honeywell International Inc.
66-1151 G.R. 03-05
RM7897A1002, RM7897C1000 7800 SERIES RELAY MODULES
Code 4-4
*Configuration
Jumper
Problem*
The configuration
jumpers differ from the
sample taken at startup.
1. Inspect the jumper connections. Make sure the clipped jumpers were
completely removed.
2. Reset and sequence the relay module.
3. If the fault persists, replace the relay module.
Code 5-1
*Preignition
Interlock*
Preignition Interlock
fault.
1. Check wiring and correct any errors.
2. Check Preignition Interlock switches to assure proper functioning.
3. Check fuel valve operation.
4. Reset and sequence the relay module; monitor the Preignition Interlock status.
5. If the fault persists, replace the relay module.
Code 5-2
*High Fire Sw.
or Low Fire
Sw.*
Either High Fire Switch
or Low Fire Switch
failure.
1. Check wiring and correct any errors.
2. Reset and sequence the relay module.
3. Use manual motor potentiometer to drive the motor open and closed. Verify at
motor switch that the end switches are operating properly. Use RUN/TEST
switch if manual potentiometer is not available.
4. Reset and sequence the relay module.
5. If the fault persists, replace the relay module.
Code 5-3
*Man-Open
Sw.; Start Sw.
or Control On*
Man-Open Switch, Start
Switch or Control On in
the wrong operational
state.
1. Check wiring and correct any errors.
2. Make sure that the Manual Open Valve Switch, Start Switch and Control are
operating properly.
3. Stat Switch held “On” too long.
4. Reset and sequence the relay module.
5. Reset and sequence the relay module. If the fault persists, replace the relay
module (RM7838A1014; RM7838B1013 or RM7838C1004 only).
Code 6-1
*Internal Faults*
Relay Module self-test
failure.
1. Reset and sequence the relay module.
2. If fault reappears, remove power from the device, reapply power, then reset
and sequence the relay module.
3. If the fault persists, replace the relay module.
Code 6-2
*Internal Faults*
Relay Module Self-Test
failure.
1. Reset and sequence the relay module.
2. If fault reappears, remove power from the device, reapply power, then reset
and sequence the relay module.
3. If fault does not repeat on the next cycle, check for electrical noise being
copied into the relay module through the external loads or possibly an
electrical grounding issue.
4. If the fault persists, replace the relay module.
Code 6-3
*Device
Specific*
Fault with special OEM
input circuits.
1. Check wiring and operation of special OEM inputs.
2. Reset and sequence the relay module.
3. If fault reappears, remove power from the device, reapply power, then reset
and sequence the relay module.
4. If the fault does not repeat on the next cycle, check for electrical noise being
copied into the relay module through the external loads or possibly an
electrical grounding issue.
5. If the fault persists, replace the relay module.
Code 6-4
*Accessory
Fault*
Unused at this time. —
Code 7-7
*Unused*
Unused at this time. —
Table 8. Blinking Fault Codes and Recommended Troubleshooting. (Continued)
Fault Code System Failure Recommended Troubleshooting
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