Berner International B-24, B-22 manual Sympto M S Cause

TROUBLESHOOTING

SYMPTO M S		CAUSE
FAN WON’T START		1)	Selector in “OFF” position
		2)	Check 3-phase line leads for power across all 3 phases
			(If one line is dead, check fuses or breaker in main
			disconnect)
		3)	Check fuse on control circuit transformer
		4)	Try “SUM” setting. If fan runs, but won’t run on “WIN”,
			check 1THS outdoor thermostat (if used) for open R-B
			contact; check limit switch on door for open-contact.
		5)	Check overload relay on fan starter. Iftripped,reset. If
			relay continues to trip, check motor full load amps versus
			M starter’s overload relay’s setting (adjustment dial on the
			frontofstarter). See manufacturer’s instruction sheet.
FAN	OPERATES, GAS	1)	Selector in “SUM” position. Turn to “WIN”
PILOT WILL NOT IGNITE,		2)	Check wire 6 to ground 115 V (defective selector switch or
GREEN “TURN RESET”			wiring to same)
DOES	NOT LIGHT	3)	Check wire 7 to ground (bad 13-14 contactinstarter
		4)	9 to ground (bad R-W contact lo-gas switch)
		5)	10 to ground (bad R-B contact in hi-gas switch)
		6)	11 to ground (bad 4-5 contact in control relay)
		7)	12 to ground (bad C-NO contact in airflow switch; pressure
			setting too high, turn adjustment screw CCW until switch
			trips; clogged tubing in airstream)
		8)	13 to ground (reset Thermodisc, inside “handy-box”)
		9)	Check toggle switch in mounting base of Fireye (must be
			left in “ON” position)
FAN	OPERATES, GAS	1)	Defective time delay TDR. (Pull from socket, turn RESET,
PILOT WILL NOT IGNITE,			and try again)
GREEN “TURN RESET”		2)	(IRI type only) - One or both gas pressure switched tripped.
LIGHTS CONTINUOUSLY			Press reset lever. If low-pressure can’t be reset, check for
WHENEVER FAN RUNS			cause of inadequate pressure. Check supply pressure ahead of
			regulator, if pressure exceeds rating of regulator,it may pass no gas or
			failtoregulate.
FAN	OPERATES, GAS	1)	Press reset button on Fireye
PILOT WILL NOT IGNITE,		2)	If Fireye won’t reset, check for presence of continuous gas
GREEN “LOCKOUT”			pilot flame
LIGHTS CONTINUOUSLY
WHENEVER FAN RUNS			CAUTION - In this case turn off manual cock in pilot
			line before stopping fan. Then investigate cause of
			pilot valve 1V sticking open
		3)	If Fireye can be reset, but on next try-for-ignition, “TURN RESET”
			lights, refer to next sections. If “LOCKOUT” lightsrefertolast
			symptom.

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