SV9401/SV9402/SV9403, SV9501/SV9502/SV9503, SV9601/SV9602 SMARTVALVE™
69-1004—01
14
Fig. 14. SV9401/SV9402/SV9403, SV9501/SV9502/SV9503, SV9601/SV9602 SmartValve troubleshooting
sequence.
INSTRUCTIONS TO THE
HOMEOWNER
WARNING
Fire or Explosion Hazard. Can cause property
damage, severe injury, or death.
Follow these warnings exactly:
1.
Do not light the pilot flame manually.
2.
Before lighting the pilot burner flame, smell around
the appliance for gas. Be sure to smell next to the
floor because LP gas is heavier than air.
WARNING
Fire or Explosion Hazard. Can cause property
damage, severe injury, or death.
If you smell gas:
• Turn off the gas supply at the appliance service valve.
On LP gas systems, turn off the gas supply at the gas
tank.
• Do not light any appliances in the house.
• Do not touch electrical switches or use the phone.
• Leave the building and use a neighbor’s phone to call
your gas supplier.
• If you cannot reach your gas supplier, call the fire
department.
START
• TURN OFF GAS SUPPLY
• ASSURE SmartValve SWITCH IS IN ON POSITION
• DISCONNECT SYSTEM CONTROL HARNESS
• SET THERMOSTAT TO CALL FOR HEAT
CHECK FOR PROPER VOLTAGE AT CONTROL
HARNESS (SEE INSET A). VOLTAGE SHOULD BE
24V BETWEEN THERMOSTAT OR PRESSURE
SWITCH AND 24V COMMON, AND 24V
BETWEEN 24V COMMON AND 24V HOT.
CHECK:
• LINE VOLTAGE POWER
• LOW VOLTAGE TRANSFORMER
• LIMIT CONTROLLER
• THERMOSTAT
• WIRING
• AIR PROVING SWITCH ON COMBUSTION AIR
BLOWER SYSTEM
• VENT DAMPER (IF USED) IS OPEN AND END
SWITCH MAKES
PLUG HARNESS INTO SmartValve CONTROL.
WAIT FOR INTERNAL CHECK DELAY
(SV9X01, SV9X03) OR PREPURGE (SV9X02)
IGNITER WARMS UP AND GLOWS RED
• TURN ON GAS SUPPLY
• PILOT BURNER LIGHTS
MAIN VALVE OPENS AND MAIN BURNER LIGHTS
SYSTEM IS OKAY
WITH PILOT BURNER CABLE CONNECTED, MEASURE
VOLTAGE AT SmartValve HSI ELEMENT
OUTPUT (SEE INSET B) 24V NOMINAL.
YES
REPLACE IGNITER/FLAME ROD ASSEMBLY
REPLACE IGNITER/FLAME ROD ASSEMBLY
CHECK THAT PILOT GAS IS FLOWING. WAIT TO
ASSURE PILOT GAS TUBING IS PURGED. RECYCLE
CALL FOR HEAT IF NECESSARY.
MEASURE VOLTAGE BETWEEN 24V HOT AND 24V
COMMON LEADS TO SmartValve CONTROL. MUST
MEASURE AT LEAST 19.5 VAC WITH IGNITER
POWERED. SEE INSET A TO IDENTIFY PROPER LEAD.
THIS CHECK MUST BE DONE WITH THE SmartValve
CONTROL CONNECTED AND IGNITER POWERED.
• CHECK THAT PILOT FLAME MAKES GOOD
CONTACT WITH PILOT BURNER FLAME ROD.
• ASSURE PILOT MOUNTING BRACKETS AND
PILOT BURNER ARE NOT BENT OR DAMAGED.
• CHECK GAS SUPPLY PRESSURE.
• CHECK PILOT BURNER ORIFICES FOR
CONTAMINATION OR DAMAGE
• CHECK FOR GOOD ELECTRICAL CONNECTION
THROUGH THE PILOT TUBING.
• IF ALL OF THE ABOVE ARE GOOD, REPLACE
IGNITER/FLAME ROD ASSEMBLY
CYCLE THERMOSTAT OFF AND BACK ON
MAIN BURNER LIGHTS
REPLACE SmartValve CONTROL
REPLACE SmartValve CONTROL
REPLACE SmartValve CONTROL
CHECK TRANSFORMER AND LINE
VOLT SUPPLY
NO
NO
NO
NO
NO
NO
NO
NO
NOTE: BEFORE TROUBLESHOOTING,
BECOME FAMILIAR WITH THE STARTUP
AND CHECKOUT PROCEDURE. ALSO
CHECK PILOT BURNER ELEMENT FOR
RESISTANCE LESS THAN 10 OHMS WITH
ELEMENT AT ROOM TEMPERATURE.
24 VOLT
THERMOSTAT
OR PRESSURE
SWITCH
24 VOLT
COMMON
EFT
OUTPUT
24 VOLT
HOT
INSET A
INSET B
HSI
TERMINALS
YES
YES
YES
YES
YES
YES
M17217A
END VIEW
OF CONTROL
HARNESS
CONNECTOR
CHECK FOR DAMAGED OR MISSING
TERMINALS IN CONNECTOR
SV9X01/SV9X02/SV9X03 SmartValve™ TROUBLESHOOTING SEQUENCE
1
1
2
2
2
1
2
IGNITER WILL CYCLE OFF AND BACK ON ONCE DURING THE
90 SECOND IGNITION TRIAL. ALL VOLTAGE MEASUREMENTS
MUST BE TAKEN WHILE THE IGNITER IS POWERED.
WHEN MEASURING VOLTAGE AT CONNECTIONS, USE
CARE TO ASSURE TERMINALS ARE NOT DAMAGED.
