Flame Sensor Error; Gas Control Valve - State Water Heaters SUF 119300 Service Handbook

5. FLAME SENSOR ERROR

F
lame Sensor(error)
0 days 0 hrs 1 mins ago
Error Code:
Flame Sensor rod detected flame
when gas valve should be off.
Shut off gas until repaired.
Call a service professional:
CHECK/ REPAIR:
• Look through sight glass. If flame is present, shut the main gas supply off. See Gas Control Valve section
below to confirm proper operation.
• If flame is not present, cycle the unit Off by turning the Enable/Disable switch to Disable, wait for 5 seconds,
and cycle the unit On by turning the Enable/Disable switch to Enable to see if the error clears. See "Flame
Sensor" section on Page 23 thru Page 24.

GAS CONTROL VALVE

The 24 Volt Gas Control Valve on these water heaters are DC voltage valves. The CCB sends 24 VAC to the
valve and the AC voltage is rectified into a DC voltage by electronics contained inside the plug end of the 24
Volt Gas Control valve wiring harness, see Figures below.
VENTURI
GAS CONTROL VALVE ASSEMBLY: SUF 60120 - 100250 MODELS
A B
9-17
BACK ADVANCED
24 VAC SOLENOID
& WIRE HARNESS
GAS CONTROL
VALVE
Servicing should only be performed by a Qualified Service Technician
CAUSES:
• The Flame Sensor has detected flame when the
Gas Control Valve is supposed to be off.
LOW GAS
PRESSURE SWITCH
COMBUSTION
AIR INLET
SUPPLY GAS
CONNECTION
21