CB780E/CB784E RELAY MODULES WITH VALVE PROVING
32-00150—03
44
750-234
Code 4-2
*Wiring
Problem/Inter
nal Fault*
Pilot (ignition) valve
terminal, main valve,
ignition or Main Valve
2 was on when it
should be off.
WARNING
Electrical Shock Hazard; Fire or Explosion Hazard.
Can cause severe injury, death or property damage.
Remove system power and turn off power supply.
1.
Remove system power and turn off fuel supply.
2.
Check wiring; correct any errors.
3.
Inspect Pilot Fuel Valve(s), both places, and connections.
4.
Reset and sequence the relay module.
5.
If the fault persists, replace the relay module.
Code 4-3
*Flame
Amplifier
Problem*
Flame not sensed, or
sensed when it should
be on or off.
1.
Check wiring; correct any errors.
2.
Make sure the flame amplifier and flame detector are compatible.
3.
Remove the flame amplifier and inspect the connections. Reseat the ampli-
fier.
4.
Reset and sequence the relay module.
5.
If the code reappears, replace the flame amplifier and/or the flame detec-
tor.
6.
If the fault persists, replace the relay module.
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 com-
pletely removed.
2.
Reset and sequence the relay module.
3.
If the fault persists, replace the relay module.
Code 5-1
*Pre-Ignition
Interlock*
Pre-Ignition Interlock
fault.
1.
Check wiring and correct any errors.
2.
Check Pre-Ignition Interlock switches to assure proper functioning.
3.
Check fuel valve operation.
4.
Reset and sequence the relay module; monitor the Pre-Ignition 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. Ver-
ify 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 (CB780E or CB784E).
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.
Table 14. Blinking Fault Codes and Recommended Troubleshooting. (Continued)
Blink Code
System Failure
Recommended Troubleshooting
