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120 volt potential exposure. Use caution making voltage checks
to avoid personal injury.
WARNING
Use caution not to damage connectors when making voltage
measurements or jumping terminals
CAUTION
Troubleshooting
System Observation for Models with Direct Spark Ignition
Water Heater Fault: Water heater does not operate
Display Error Code: Water heater display does not
operate - blank display
Check main power supply to water heater –
fuse, circuit breaker, plug receptacle, line cord or
wiring to water heater.
Check to make sure switch on front of control
panel is in the ON position.
Verify primary voltage at the transformer.
Refer to control board illustration.
Voltage at transformer across black and
white wires should be 110-120 VAC.
Check line cord with volt meter. Replace
line cord if defective.
Verify secondary voltage at the control board.
Refer to control board illustration.
Voltage at connector location J8 across
blue and yellow wires should be 24VAC.
If not, check transformer. Replace
transformer if defective.
Does water heater display
operate? Increase thermostat
setting if tank is warm.
Is 24VAC present between
RED
and
BLACK
wire pin
connections on the back of
control display?
Display operates-See next page.
Display operates-See next page.
Replace control board.
Check wire
harness for proper
continuity.
Check wires for proper
termination to control display.
Are wire terminations connected
properly to control display?
Replace
control
board.
Make proper wire
terminations.
Y
Y
Y
Y
N
N
N
N
Yellow &
Blue
wires.
Black &
White
wires.
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