Honeywell TRADELINE SV9501 Installation Manual page 13

SV9500SV9600 SmartValve™ TROUBLESHOOTING SEQUENCE
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.
YES
PLUG HARNESS INTO SmartValve CONTROL.
WAIT FOR INTERNAL CHECK DELAY.
WAIT FOR PREPURGE.
IGNITER WARMS UP AND GLOWS RED
YES
1
• TURN ON GAS SUPPLY
• PILOT BURNER LIGHTS
YES
MAIN VALVE OPENS AND MAIN BURNER LIGHTS
YES
SYSTEM IS OKAY
1
IGNITER WILL STAY ENERGIZED AS LONG
AS APPLIANCE CALL FOR HEAT IS IN PLACE.
SV9501/SV9502/SV9601/SV9602 SMARTVALVE
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.
CHECK:
• LINE VOLTAGE POWER
• LOW VOLTAGE TRANSFORMER
NO
• LIMIT CONTROLLER
• THERMOSTAT
• WIRING
2
• AIR PROVING SWITCH ON COMBUSTION AIR
BLOWER SYSTEM
• VENT DAMPER (IF USED) IS OPEN AND END
SWITCH MAKES
WITH PILOT BURNER CABLE CONNECTED, MEASURE
NO
VOLTAGE AT SmartValve HSI ELEMENT
OUTPUT (SEE INSET B) 24V NOMINAL.
YES
REPLACE IGNITER/FLAME ROD ASSEMBLY
NO
CHECK THAT PILOT GAS IS FLOWING. WAIT TO
ASSURE PILOT GAS TUBING IS PURGED.
YES
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.
YES
REPLACE IGNITER/FLAME ROD ASSEMBLY
NO
• CHECK THAT PILOT FLAME MAKES GOOD
CONTACT WITH PILOT BURNER FLAME ROD.
• CHECK FOR GOOD ELECTRICAL CONNECTION
THROUGH THE PILOT TUBING.
• IF BOTH OF THE ABOVE ARE GOOD, REPLACE
IGNITER/FLAME ROD ASSEMBLY
CYCLE THERMOSTAT OFF AND BACK ON
MAIN BURNER LIGHTS
2 WHEN MEASURING VOLTAGE AT CONNECTIONS, USE
CARE TO ASSURE TERMINALS ARE NOT DAMAGED.
Fig. 15. SV9500/SV9600 troubleshooting guide.
NO
2
1
NO
NO
2
NO
13
TM
SYSTEM CONTROL
INSET A
END VIEW
OF CONTROL
24 VOLT
HARNESS
THERMOSTAT
CONNECTOR
OR PRESSURE
SWITCH
EFT
OUTPUT
24 VOLT
24 VOLT
COMMON
HOT
CHECK FOR DAMAGED OR MISSING
TERMINALS IN CONNECTOR
INSET B
HSI
TERMINALS
REPLACE SmartValve CONTROL
REPLACE SmartValve CONTROL
CHECK TRANSFORMER AND LINE
VOLT SUPPLY
REPLACE SmartValve CONTROL
M17146A
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