Bradford White Magnum D75T125E3N Installation & Operation Manual page 52

Error
Definition of Code
Code
Flame Sensed Out of
Normal Sequence
6 (Before Opening Gas
Valve or After Closing
Gas Valve)
Flame Detected
23
Before Ignition
Flame Detected After
24 Heating Cycle
Completes
Upper Sensor
31
Readings Faulty
Lower Sensor
32
Readings Faulty
Flame Rod Shorted
57
to Ground
AC Line Frequency
Error – Signal Too
58
Noisy or Frequency
Incorrect
Line Voltage Too Low
59
or High
DC Output Voltage
61
Unstable
Maximum Number of
62
Retries Detected
Maximum Number of
63 Ignition Recycles
Detected
64 Electronics Failure
High Water
65 Temperature (Over
200˚F)
Cause of Problem and Actions Taken to Correct
Check to make sure gas valve has closed. No voltage should be present at
the gas valve before or after ignition cycle. Make sure wire positions on the
wire harness are correct. If gas valve is stuck open, replace.
Check to make sure gas valve has closed. No voltage should be present at
the gas valve before the ignition cycle. Make sure wire positions on the wire
harness are correct. If gas valve is stuck open, replace.
Check to make sure gas valve has closed. No voltage should be present at
the gas valve before the ignition cycle. Make sure wire positions on the wire
harness are correct. If gas valve is stuck open, replace.
Resistance of upper sensor out of operating range. Check continuity of wire
harness to upper sensor, and if O.K., replace upper sensor.
Resistance of lower sensor out of operating range. Check continuity of wire
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
has bare spots touching metal parts of if flame sensor rod is touching the
pilot shield or other metal parts. Replace pilot if flame sense wire is damaged
or flame rod is bent.
Check line voltage frequency to the water heater. Determine if there are wide
fluctuations. Call an electrician if the problem persists. The water heater
should be on a separate line.
Check line voltage to the water heater. Determine cause of low or high
voltage. Call an electrician or your utility. The water heater should be on a
separate line.
Check line voltage to the water heater for erratic readings. Also check wiring
to make sure there are no shorts. If power supply and wiring is O.K., replace
control board.
Pilot is either not lighting or not staying lit during the ignition cycle. Check
inlet gas pressure for minimum pressure on rating label. Is pilot electrode
sparking? Check gas valve wire harness for broken wires or shorts. If 24
volts is present between PV and PV/MV terminals at the gas valve, replace
gas valve. Check for voltage output to the yellow and red gas valve wires on
the control board pins. If during the ignition trial period, there is no voltage
present at the control board pin terminal for the red and yellow wires leading
to the gas valve, then replace the control board. Replace pilot if wires are
damaged or electrode is damaged.
Pilot flame is lost during run cycle, then reestablished on ignition cycle.
Check inlet gas pressure. Is gas pressure dropping below the minimum
operating pressure on the rating label after the main gas valve opens? Is the
gas pipe size to the water heater adequate? Check the pilot shield position
and condition of the burners. Clean or replace as needed. Check the pilot
flame and observe the microamp output on the run cycle. Check the pilot
tubing to the pilot and replace if crimped or damaged. Replace pilot if wires,
flame sensor, or electrode is damaged.
Replace control board.
Water temperature in tank has exceeded 200˚F. Check lower sensor. Make
sure sensor is fully inserted into the well (clip on sensor wire secures sensor
in place). Check lower and upper (where used) sensor readings. If not within
specifications, replace sensor. If sensor and wire harnesses check O.K.,
replace control board.
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