GSW 319594-000 manual Viii Troubleshooting Guide, Symptom, Possible Causes, Corrective Action

VIII) TROUBLESHOOTING GUIDE

Robertshaw 2000WDER and White-Rodgers Intelli-VentTM

SYMPTOM		POSSIBLE CAUSE(S)		CORRECTIVE ACTION
	1.	No Power to unit.	1.	Plug in power cord, check fuses/supply
	2.	Thermostat setting too low.		voltage.
	3.	Defective air pressure switch (must be	2.	Increase thermostat temperature set-
BLOWER WILL NOT		open at start-up before blower is ener-		ting.
START.		gized).	3.	Replace air pressure switch.
	4.	Defective blower.	4.	Replace blower.
	5.	Disconnected or loose wire.	5.	Repair/reconnect wires.
	6.	Control locked out.	6.	Reset – determine cause of lockout.
	1.	Air pressure switch not closing due to	1.	Determine cause of insufficient draft.
		insufficient draft - check for:		Check draft with manometer at pres-
				sure switch (refer to Table 2 for mini-
				mum acceptable draft settings).
		a) vent piping blocked,		a) remove blockage,
		b) piping length too long,		b) reduce vent length/increase vent
		c) frozen vent termination,		size,
BLOWER RUNS		d) clogged/dirty blower.		c) clear termination of snow/ice,
CONTINUOUSLY.	2.	Disconnected, torn or blocked pressure		d) clean blower wheel.
		sensing tubing from air pressure switch	2.	Reconnect or replace pressure sensing
		to blower housing.		tubing.
	3.	Air pressure switch not closing due to	3.	Replace defective pressure switch.
		defective switch.	4.	Determine cause of overheating check
	4.	High limit switch open due to excessive		for: overfiring, insufficient air supply,
		vent temperature or defective switch.		high ambient air temperature (once
				activated high limit must be replaced).
	1.	120VAC polarity reversed at 120VAC	1.	Reverse polarity at 120VAC outlet
HOT-SURFACE IGNITER		outlet receptacle.		receptacle.
	2.	Defective hot-surface igniter.	2.	Replace	igniter (Check for 120VAC
NOT GLOWING FOLLOW-
				across I1 & I2, Robertshaw only).
ING WARM-UP PERIOD.
	3.	Defective Control.	3.	Replace control.
	4.	Defective Flammable Vapour Sensor.	4.	Replace Flammable Vapour Sensor.
	1.	No gas supply.	1.	Check/turn on gas supply.
	2.	Gas control switch in “OFF” position.	2.	Turn control switch to “ON” position.
	3.	Insufficient gas supply.	3.	Ensure correct supply pressure for gas
				type (Nat Gas 7.0 in. w.c. (1.74 kPa))
				(Propane 11.0 in. w.c. (2.74 kPa)).
	4.	Incorrect manifold gas pressure.	4.	Check/adjust for correct manifold gas
				pressure (NG 3.5 in. w.c.(0.87 kPa)),
				(Propane 10.0 in. w.c. (2.49 kPa)).
CONTROL LOCKED OUT.	5.	Incorrect gas type.	5.	Ensure	correct gas	type for water
	6.	Defective igniter/loose or disconnected		heater model.
		wire.	6.	Replace	defective	igniter/reconnect
	7.	Improperly positioned, dirty, or defec-		wiring.
		tive flame rod/loose or disconnected	7.	Reposition, clean, or replace defective
		wire.		flame rod/reconnect wiring.
	8.	Burner orifice clogged.	8.	Remove obstruction.
	9.	Blocked water heater flue.	9	Remove blockage/clean flue.
	10.Defective control.		10.Replace Control.
	11. Defective Flammable Vapour Sensor.		11. Replace Defective Flammable Vapour
				Sensor.
	1.	Internal control fault.	1.	Replace control.
CONTROL LOCKED OUT.	2.	ECO failure – excessive water temper-	2.	Replace control.
*SOLID GREEN LED.		ature.
	3.	Excessive humidity/damp environment.	3.	Allow control to dry.
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