Fulton Heating Solutions, Inc. -- PHW Manual -- 2010-0713
Page 79
Fault 57
*Purge Fan Sw. Off*
Purge fan switch is off
when it should be on.
1. Inspect the Purge Fan Switch terminal 18 and connections.
Assure that the switch is functioning correctly.
2. Reset and sequence the 7865.
3. If the fault persists, replace the relay module.
Fault 58
Combustion pressure
switch failure and flame
rod failure.
1. Check for proper incoming gas pressure.
2. Check flame rod and pressure switch condition and
connections.
3. Check incoming power to 7865 sub-base at terminal 20.
4. Check for voltage on the flame rod amplifier.
5. Reset control.
6. If fault persists replace 7865 flame programmer.
Fault 105-127 Call Service. 1. Replace 7865 controller.
6. Troubleshooting – RM7865C without display
a) When the control has faulted out, you can identify the fault by counting the number of
blinks the “LED” displays.
b) 6 Blinks - Unit has exceeded 15 cycles per hour.
5 Blinks - High fire switch fault.
4 Blinks - Purge fan switch fault.
3 Blinks - Blocked intake switch fault.
2 Blinks - Flame combustion switch fault.
1 Blink - Other fault
7. Honeywell RM7865C
Jumpers Result of Clipping Jumper
JR1 JR2 JR3
ON ON ON
For On/Off Application, RM7865A
Retrofit
4 Attempts
ON OFF ON
For On/Off Application, Flame Rod,
RM 7865B Retrofit
4 Attempts
OFF ON ON Modulated, No Flame Rod 4 Attempts
OFF OFF ON
Modulated, Flame Rod RM7865C
Standard
4 Attempts
OFF OFF OFF Modulated, Flame Rod 1 Attempt
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