Honeywell SmartValve SV9401 Installation Instructions Manual page 14

SV9401/SV9402/SV9403, SV9501/SV9502/SV9503, SV9601/SV9602 SMARTVALVE™
SV9X01/SV9X02/SV9X03 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.
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
1
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.
Fig. 14. SV9401/SV9402/SV9403, SV9501/SV9502/SV9503, SV9601/SV9602 SmartValve troubleshooting sequence.
69-1004—2
NO
2
YES
NO
YES
1
NO
YES
NO
YES
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
• LIMIT CONTROLLER
• THERMOSTAT
• WIRING
• AIR PROVING SWITCH ON COMBUSTION AIR
BLOWER SYSTEM
• VENT DAMPER (IF USED) IS OPEN AND END
SWITCH MAKES
WITH PILOT BURNER CABLE CONNECTED, MEASURE
VOLTAGE AT SmartValve HSI ELEMENT
OUTPUT (SEE INSET B) 24V NOMINAL.
YES
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.
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
• 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
WHEN MEASURING VOLTAGE AT CONNECTIONS, USE
2
CARE TO ASSURE TERMINALS ARE NOT DAMAGED.
14
INSET A
24 VOLT
THERMOSTAT
OR PRESSURE
SWITCH
24 VOLT
COMMON
CHECK FOR DAMAGED OR MISSING
TERMINALS IN CONNECTOR
INSET B
HSI
TERMINALS
NO
2
1
REPLACE SmartValve CONTROL
NO
REPLACE SmartValve CONTROL
NO
CHECK TRANSFORMER AND LINE
VOLT SUPPLY
2
NO
REPLACE SmartValve CONTROL
END VIEW
OF CONTROL
HARNESS
CONNECTOR
EFT
OUTPUT
24 VOLT
HOT
M17217