2nd Ave 7800 Series Explosion Hazard, Can cause explosion, serious injury or death

7800 SERIES RELAY MODULES

Table 3. Hold and Fault Message Summary (continued).

Fault Code	System Failure			Recommended Troubleshooting
Fault 32	Combustion Airflow	1.	Check wiring; correct any errors.
*Airflow Switch*	Interlock fault.	2.	Inspect the fan; make sure there is no blockage of the air intake
			and it is supplying air.
		3. Make sure the Airflow Interlock Switches are working properly
			and all switch contacts are free of contaminants.
		4.	Reset and sequence the relay module to PREPURGE. Place the
			Run/Test Switch in the Test position, if available. Measure the
			voltage between terminals 7 and G (ground). Line voltage
			should be present.
		5. If steps 1 through 4 are correct and the fault persists, replace
			the relay module.
Fault 33	Preignition interlock fault.	1.	Check wiring; correct any errors.
*Preignition ILK*		2. Inspect the Preignition Interlock switches and make sure they
			function properly.
		3. Check fuel valve operation. Valve must close within five
			seconds.
		4. Reset and sequence the relay module.
		5. During STANDBY or PREPURGE, measure the voltage between
			terminal 20 and G (ground). For EC/RM7810, 7820, 7830, 7850,
			check voltage between terminal 17 and G. Line voltage should
			be present. If not, the Preignition Interlock switches can be
			defective and need replacing.
		6. If the fault persists, replace the relay module.
Fault 34	CTL input was energized at	1.	Check wiring; correct any errors.
*Control On*	the wrong time for the relay	2.	Reset and sequence the relay module.
	module. This fault implies a	3.	If fault persists, replace the relay module.
	field wiring error.
Fault 35	Safety relay was off when it	1.	Reset	and sequence the relay module. If fault repeats, replace
*Call Service*	should be on or a fuse has		relay module, but be sure to test for excessive loads on
	blown.		appropriate terminals described by fault code.
Fault 36	Main valve terminal was off	2.	If fault does not repeat on next cycle check for electrical noise
*Call Service*	when it should be on.		being coupled into the relay module through the loads on
			appropriate terminals described by the fault code.
Fault 37	Pilot (ignition) valve terminal	3.	If fault persists, replace the relay module.
*Call Service*	was off when it should be
	on.
Fault 38	Ignition terminal was off
*Call Service*	when it should be on.
Fault 39	V2S valve terminal (usually
*Call Service*	terminal 21) was off when it
	should be on.
Fault 40	Safety relay was on when it
*Call Service*	should be off.
Fault 41	Main valve terminal was on		WARNING
*Main Valve On*	when it should be off.
Fault 42	Pilot (ignition) valve terminal		Explosion Hazard.
*Pilot Valve On*	was on when it should be		Can cause explosion, serious injury or death.
	off.		1. Remove system power, turn off fuel supply.
Fault 43	Ignition terminal was on		2. Check for wiring errors that could provide power to
*Ignition On*	when it should be off.			terminals described by the fault. Correct any errors.
Fault 44	V2S valve terminal, used as		3. Re-power system; reset and sequence the relay module.
*Pilot Valve 2 On*	a pilot, is on when it should		4. If fault persists, replace the relay module.
	be off.		5.	When fault is corrected, turn on fuel supply.

(continued)

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