State GS6 75 YRPDT - Manual (Page 31)

31
TROUBLESHOOTING GUIDELINES TROUBLESHOOTING GUIDELINES
TROUBLE SHOOTING
Please check guidelines below. For your safety, water heater service should be performed only by a qualifi ed service technician.
Read the GENERAL SAFETY INFORMATION section fi rst.
# LED STATUS PROBLEM SOLUTION
1
The gas control valve/thermostat
has sensed inadequate or no earth
ground.
1 Ensure the wall outlet (power supply) is properly
grounded.
2 Ensure all ground connections/wires on the water
heater are securely connected.
2
The gas control valve/thermostat
has sensed reversed polarity in the
120 VAC power supply.
1 Ensure the wall outlet/power supply is properly wired.
2 Ensure all internal 120 VAC wiring connections and
wiring harness have no reversed wires. 120 VAC "hot"
wire must connect to the on/off switch.
3
Pressure switch circuit remaining
closed for more than 5 seconds
after heating cycle begins.
Blower may not start in this
condition.
1 Ensure air pressure switch circuit wiring is correct and
the air pressure switch is not jumpered.
2 Replace the air pressure switch.
4
Pressure switch circuit remains
open longer than 5 seconds after
the blower is energized.
Blower may run continuously in
this condition.
1 Ensure the air pressure switch sensing tube is properly
connected at both ends and is not kinked or damaged.
2 Ensure the correct size of vent and intake air pipe (direct
vent products) was used per the installation instructions
in the manual that came with the water heater.
3 Ensure maximum number of elbows or maximum
equivalent feet of vent or intake air pipe has not been
exceeded per the installation instructions in the manual
that came with the water heater.
4 Ensure there are no obstructions in the vent or intake air pipe.
5
The gas control valve/thermostat
has detected an open igniter circuit.
1 Check wiring to the hot surface igniter assembly -
replace igniter assembly if wiring is damaged or worn.
2 Check resistance of the igniter at igniter assembly
plug - should be between 11 and 18 ohms at room
temperature (77° F at plug end) - replace igniter if open
or shorted.
3 Check igniter assembly plug and the socket on the gas
control valve/thermostat for good connection.
4 Replace igniter assembly if the plug is worn or damaged.
5 Replace the gas control valve/thermostat if the igniter
assembly socket on the bottom of the control is worn or
damaged.
6
Ignition/fl ame failure.
The gas control valve/thermostat
has reached the maximum number
of retries (3) for ignition and is
currently locked out for one hour.
Cycle the power to the water heater
off and on to reset.
1 Ensure fl ame sensor is making good contact with the
burner fl ame and ensure fl ame is steady. Also ensure
supply and manifold gas pressures are within the
requirements in the installation manual.
2 Gas supply is turned off - pressure is too low.
3 Ensure the fl ame sensor is clean - use fi ne steel wool
to clean the fl ame sensor.
4 Check igniter assembly plug and the socket on the
bottom of the gas control valve/thermostat for good
connection. Replace igniter assembly if the plug is worn
or damaged. Replace the gas control valve/thermostat if
socket is worn or damaged.
5 Replace igniter assembly.