Bradford-White Corp 238-48384-00F, ULTRA HIGH EFFICIENCY COMMERCIAL GAS WATER HEATER warranty

DIAGNOSTIC ERROR CODES AND TROUBLESHOOTING PROCEDURES FOR EF MODELS WITH HONEYWELL INTEGRATED DIRECT SPARK IGNITON CONTROL SYSTEM

Error	Definition of Code	Cause of Problem and Actions Taken to Correct
Code
		Check power supply to the water heater. Make sure water heater is plugged in
No code –		and the breaker is on. Check if there is 120 volts power supply to the LINE
		connections on the control board. If 120 volts is present, check for 24 volts
blank
		output to SECONDARY terminals on the Control Board. Check for loose wires,
display
		defective transformer. Check wire harness connections from display to the
		control board.
		Determine flame sense current in the Service Mode with the water heater
4	Low Flame Sense	operating. If less than 4.0 microamps, check burner flame sense rod and wire.
	Current	Clean flame sense rod with emery cloth. If problem is not solved, check for
		debris clogging burner or replace flame sense rod.
	Flame Sensed Out of
	Normal Sequence	Check to make sure gas valve has closed. No voltage should be present at the
6	(Before Opening Gas	gas valve before or after ignition cycle. Make sure wire positions on the wire
	Valve or After	harness are correct. If gas valve is stuck open, replace.
	Closing Gas Valve)
	Flame Detected	Check to make sure gas valve has closed. No voltage should be present at the
23		gas valve before the ignition cycle. Make sure wire positions on the wire
	Before Ignition
		harness are correct. If gas valve is stuck open, replace.
	Flame Detected After	Check to make sure gas valve has closed. No voltage should be present at the
24	Heating Cycle	gas valve before the ignition cycle. Make sure wire positions on the wire
	Completes	harness are correct. If gas valve is stuck open, replace.
		Check to see if the exhaust collector high limit switch, located in the exhaust
		collector area near the pressure switch has opened. Depress the red manual
26	Exhaust Collector	reset button on the high limit switch. If it resets with a “click”, the switch has
	Limit Switch Open	opened. Check for evidence of high temperatures in this compartment. If there
		is evidence of high temperatures, call Tech Support. Do not continue to
		operate the water heater if high temperature is occurring in this area.
		The blocked vent pressure switch contacts have opened. Check to make sure
		the venting system is not blocked. Check to make sure the condensate drain is
	Pressure Switch	not clogged and is sloping toward the drain. Make sure the vent length does
29		not exceed the specified limits. Make sure the vent terminal is not blocked.
	Failed to Close
		Check to make sure the pressure switch tubing is clear. Replace the pressure
		switch if the venting system has checked out O.K. Control will reset once
		problem is corrected.
32	Lower Sensor	Resistance of lower sensor out of operating range. Check continuity of wire
	Readings Faulty	harness to lower sensor, and if O.K., replace lower sensor.
		Pilot flame sensor rod is shorted to ground. Check to see if flame sensor wire
57	Flame Rod Shorted	has bare spots touching metal parts of if flame sensor rod is touching the burner
	to Ground	or other metal parts. Replace if flame sense wire is damaged or flame rod is
		bent.
	AC Line Frequency	Check line voltage frequency to the water heater. Determine if there are wide
	Error – Signal Too
58		fluctuations. Call an electrician if the problem persists. The water heater
	Noisy or Frequency
		should be on a separate line.
	Incorrect
59	Line Voltage Too	Check line voltage to the water heater. Determine cause of low or high voltage.
	Low or High	Call an electrician or your utility. The water heater should be on a separate line.
	DC Output Voltage	Check line voltage to the water heater for erratic readings. Also check wiring to
61		make sure there are no shorts. If power supply and wiring are O.K., replace
	Unstable
		control board.

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