Bradford White UCG100H199 Installation & Operation Manual page 56

Error
Definition of Code
Code
Maximum Number of
62
Retries Detected
Maximum Number of
63 Ignition Recycles
Detected
64 Electronics Failure
High Water
65 Temperature (Over
200°F (93°C))
Cause of Problem and Actions Taken to Correct
 Burner is either not lighting or not staying lit during ignition cycle.
 Check inlet gas pressure for minimum pressure on rating label.
 Can you hear sparking to the burner?
 Check high voltage cable connections.
 Check inlet gas pressure to the gas valve making sure the pressure is within
the limits specified on the rating label.
 Check gas valve wire harness for broken wires or shorts.
 Check outlet gas pressure.
 If 24 volts is present to the terminals at the gas valve, replace gas valve.
 Check for voltage output to the blue gas valve wires on the control board pins.
 If during the ignition trial period, there is no voltage present at the control
board pin terminals for the blue wires leading to the gas valve, then replace
the control board.
 Replace spark rod if insulator is damaged or rod is loose.
 Check to make sure combustion blower is operating when thermostat calls for
heat.
 If blower is not running check for 120 volts to blower harness and then at
blower pin connections.
 Replace control, wire harness, or blower if defective.
 Check to make sure vent terminals are clear of debris or snow and ice.
 Make sure the condensate drain flows freely.
 Burner flame is lost during run cycle, and then re-established on ignition cycle.
Check inlet gas pressure.
 Is gas pressure dropping below the minimum operating pressure on the rating
label after the gas valve opens?
 Is the gas pipe size to the water heater adequate?
 Check the condition of the burner.
 Clean or replace as needed.
 Check the burner flame and observe the microamp output on the run cycle.
 Replace burner if clogged with dirt and debris.
 Replace spark rod or flame sensor if damaged.
 Check to make sure vent terminals are clear of debris or snow and ice.
 Make sure the condensate drain flows freely.
 Replace control board.
 Water temperature in tank has exceeded 200°F (93°C).
 Check tank sensor.
 Make sure sensor is fully inserted into the well (clip on sensor wire secures
sensor in place).
 Check sensor reading.
 If not within specifications, replace sensor.
 If sensor and wire harnesses check O.K., replace control board.
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