Honeywell PDX140S*F(BN,SX,CX) PDX Series, Troubleshooting, LED Status, Control Status, Service

PDX Series

Troubleshooting

	LED Status		Control Status		Probable Cause		Service
						Procedure
				1. Unstable pilot.		1. Page 15
Six-one flash, three		Failed to light pilot.		2. Pilot tube blocked or restricted.
second pause		System auto resets.		3. Oxidation build up on pilot electrode.		2-4. Page 17
				4. Wire damage to pilot assembly or bad
				connection at gas valve.
		Pressure switch		1. Vent blockage or improper vent configuration.		1. Check vent or vent tables.
				2. Pressure switch tubing kinked or blocked.
		or blower temp				2 & 3 Page 18
				3. Faulty pressure switch.
		switch opened				4. Refer to venting section of
Six-two flash, three				4. Vent termination being affected by wind
		during burner				installation manual
second pause				5. Blower not spinning up to speed.		5. Page 20
		operation.
				6. Blower temp or exhaust temp too high		6 & 7 Page 22
		System auto				8. Refer to installation
				7. Faulty blower temperature switch.
		resets.				manual.
				8. Insufficient combustion air.
				1. Unstable pilot.
		Pilot flame		2. Pilot tube blocked or restricted.		1. Page 15
				3. Oxidation build up on pilot electrode.
Six-three flash, three		extinguished.				2-4. Page 17
				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		Pilot valve stuck in open position.		Replace gas control,
		sensed.
second pause						page 26
		System auto
		resets.
				WARNING: EXPLOSION HAZARD
				* Indicates gasoline vapors were detected at potentially
		Flammable Vapor		explosive levels.
Seven flash, three second				* Verify no gasoline vapors are still present		Page 28
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 28
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 24
		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 26
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 26

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