Bradford-White Corp C)*(N, PDX75S70F(B, CX), PDX65S65F(B, PDX50S60F(B Troubleshooting LED Status

PDX Series

Troubleshooting

LED Status		Control		Probable Cause		Service
		Status			Procedure
	Failed to light		1.	Unstable pilot.	1. Page 14
			2.	Pilot tube blocked or restricted.
Six-one flash, three	pilot.
			3.	Oxidation build up on pilot electrode.	2-4. Page 16
second pause	System auto
			4.	Wire damage to pilot assembly or bad
	resets.
				connection at gas valve.
	Pressure switch		1.	Vent blockage or improper vent configuration.	1. Check vent or vent tables.
	or blower temp		2.	Pressure switch tubing kinked or blocked.	2 & 3 Page 17
Six-two flash, three	switch opened		3.	Faulty pressure switch.	4. Refer to venting section of
	during burner		4.	Vent termination being affected by wind
second pause					installation manual
	operation.		5.	Blower not spinning up to speed.
	System auto		6.	Blower temp or exhaust temp too high	5. Page 21
	resets.		7.	Faulty blower temperature switch.	6 & 7 Page 23
			1.	Unstable pilot.
	Pilot flame		2.	Pilot tube blocked or restricted.	1. Page 14
			3.	Oxidation build up on pilot electrode.
Six-three flash, three	extinguished.				2-4. Page 16
			4.	Wire damage to pilot assembly or bad
second pause	System auto
				connection at gas valve.	5. Refer to installation manual
	resets.
			5.	Insufficient combustion air.
			6.	Gas pressure is out of specification.
	Undesired-false
Six-four flash, three	pilot flame				Replace gas control,
	sensed.		Pilot valve stuck in open position.
second pause					page 27
	System auto
	resets.
				WARNING: EXPLOSION HAZARD
			* Indicates gasoline vapors were detected at potentially
Seven flash, three	Flammable Vapor			explosive levels.
			* Verify no gasoline vapors are still present		Page 29
second pause	Sensor fault		* Reset the control by cycling power to the appliance or
	detected			by cycling the ON/OFF switch.
			* Replace the Flammable Vapors Sensor element if a
			gasoline spill event occurred.
Eight-one flash, three	Flammable Vapor		* Verify Flammable Vapor Sensor (FVS) resistance is
	Sensor out of			not below 25 K Ohms.	Page 29
second pause			* Check wiring to FVS and insure it is not shorted.
	specification.
			* Replace control if everything above checks out OK.
	Thermal well		1.	Damage to thermal well wire.	Page 25
	sensor damaged
			2.	Thermal well sensor resistance out of range.
Eight-three flash, three	or unplugged
second pause	Gas valve		1.	Control needs to be reset.	1. Interrupt power supply
	electronics fault				2. Replace gas control,
			2.	Control is wet or physically damaged.
	detected				page 27
Eight-four flash, three	Gas valve fault		1.	Control needs to be reset.	1. Interrupt power supply
second pause	detected.		2.	Control is wet or physically damaged.	2. Replace gas control,
					page 27

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