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Technical Training Department ©2003
Ashland City, Tennessee
SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
TEST 8 - IGNITER HEATS – NO MAIN BURNER
Conditions:
Plugs in receptacle
Igniter energizes (gets red)
No main burner or main shuts off within 5 seconds.
Note flash code of LED.
TEST 8
Test of Igniter and gas valve circuit
If… ...then
short heat up time of igniter
•
check control box grounding
normal (Approximate 20 seconds)
warm up - no ignition
•
check for 24V from E1, Pin 12 to ground during 4
second trial.
- Yes - Continue
- No - Replace Igntion Board
no voltage present
E4, Pin 12 to
ground
replace ignition board
24 Volt
was present
from E1, Pin
12 to ground, but no main burner
•
check that air has been purged from gas circuit
•
check that wiring and connections to gas valve and
E1, Pin 9 are correct
•
check for 24 VAC at E1, Pin 9 to ground during 4
second trial
24
24
E1 Plug, Pin 9
Plug in Receptacle
E1 Plug, Pin 12
Plug in Receptacle
Pin 12
Pin 9