CONTROL DISPLAY TROUBLESHOOTING

ELECTRONIC CONTROL DISPLAY

Please check guidelines below. For your safety, water heater service should be performed only by a qualified service person.

Read the GENERAL SAFETY INFORMATION supplied by the water heater manufacturer.

 

CONTROL DISPLAY STATUS

PROBLEM

 

SOLUTION

 

 

 

 

 

1.

“POWER” Flashing

 

1.

Check the 5-conductor data cable that

Communication Error

 

runs between the upper and lower

 

 

The system has detected a

 

controls. Check that the wiring is not

 

 

 

broken, and the connectors on both ends

 

 

communication error between the

 

 

 

 

are properly seated in the mating

 

 

upper and lower controls.

 

 

 

 

connectors.

 

 

 

 

 

 

 

2.

Replace the upper control, if the problem

 

 

 

 

persists:

 

 

 

3.

Replace the lower control.

2.

“HEATING” and “SHORT” Flashing

 

1.

Turn the power off for 10 to 20 seconds

The self-diagnostic tests have

 

then on again to clear the error code.

 

 

found a problem with an internal

2.

If the error code persists or cannot be

 

 

circuit.

 

 

 

cleared, replace the lower control.

 

 

 

 

3.

“HEATING” and “OPEN” Flashing

 

1.

Gas supply is turned off – pressure too

Ignition/flame failure.

 

low. Ensure supply and manifold gas

 

 

The water heater has reached the

 

pressures are within requirements in the

 

 

 

installation manual. Manifold gas

 

 

maximum number of retries and is

 

 

 

 

pressure is non-adjustable, if pressure is

 

 

currently locked out for one hour.

 

 

 

 

off by more than 0.3” W.C. (75 Pa)

 

 

 

 

 

 

Cycle the power to the water

 

replace the lower control.

 

 

heater off and on to reset.

2.

Low supply voltage – should be 115 –

 

 

 

 

 

 

 

125 VAC.

 

 

 

3.

Ensure flame sensor is making good

 

 

 

 

contact with the burner flame, ensure

 

 

 

 

flame is steady.

 

 

 

4.

Ensure the flame sensor is clean – use

 

 

 

 

ultra fine steel wool or Scotch-BriteTMpad

 

 

 

 

to clean the flame sensor.

 

 

 

5.

Ensure the hot surface ignitor is

 

 

 

 

positioned to provide consistent ignition.

 

 

 

6.

Check for any cracks in the ignitor

 

 

 

 

assembly ceramic insulators – replace

 

 

 

 

ignitor assembly if damaged.

 

 

 

7.

Check resistance of the ignitor at room

 

 

 

 

temperature (77°F – 25°C) at the plug

 

 

 

 

end. Replace ignitor if the resistance is

 

 

 

 

not within 1.38 to 2.31 ohms at room

 

 

 

 

temperature.

4.

“HEATING”, “OPEN”, and “SHORT” Flashing

 

1.

Ensure flame sensor is making good

Weak flame sensor current.

 

contact with the burner flame, ensure

 

 

 

 

flame is steady.

 

 

 

2.

Ensure the flame sensor is clean – use

 

 

 

 

ultra fine steel wool or Scotch-BriteTMpad

 

 

 

 

to clean the flame sensor.

5.

“ECO” and “OPEN” Flashing

 

1.

Turn the power off for 10 – 20 seconds

Water temperature in the tank has

 

then on again to clear this error code.

 

 

exceeded 185°F (85°C) and has

2.

Replace the lower control if the error

 

 

activated the ECO.

 

 

 

code persists.

 

 

 

 

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State Industries GP 6 50YPC T 100, 317998-002 Control Display Troubleshooting, Control Display Status Problem Solution
Page 29 Page 31

317998-002, GP 6 50YPC T 100, GP 6 40YPC T 100 specifications

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