State Water Heaters GPG/GPV-540A Instruction Manual page 38

GAS CONTROL VALVE
JUMPING OUT COMPONENTS AND/OR CIRCUITS DURING
TROUBLESHOOTING CAN CAUSE SERIOUS PROBLEMS
WITH THE POWER BURNER'S OPERATING SEQUENCE
AND IGNITION SAFETY. IF YOU DO NOT HAVE THE PROPER
TEST EQUIPMENT, I.E. A VOLT-OHM METER AND A MICRO-
AMMETER DO NOT ATTEMPT TO TROUBLESHOOT OR
REPAIR A. O. SMITH EQUIPMENT.
ALTERING THE IGNITION MODULE AND / OR CONTROL
BOX WIRING IN ANY WAY COULD RESULT IN INTERNAL
DAMAGE TO THE MODULE CIRCUITS, POSSIBLY ALTERING
THE IGNITION SEQUENCE ALLOWING GAS VALVES TO
OPEN BEFORE THE HOT SURFACE IGNITER IS UP TO
IGNITION TEMPERATURE.
NOTE:
MOTOR WILL NOT RUN
SERVICE
ELECTRICAL SERVICING
TROUBLESHOOTING
BURNER LOCKOUT ONCE IN A WHILE
38
FIGURE 32.