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Technical Training Department
Ashland City, Tennessee
SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
©2003
TEST 7 - INDUCER ON – PROVER SWITCH AND LOW GAS SWITCH
CLOSED – NO IGNITER OPERATION
Continuity check - Power off- Plug removed from E4 receptacles
TEST 7
Voltage check and continuity check of hot surface igniter circuit
Nominal 80 VAC check - Plug in E4- Power "On"
If… ...then
continuity
is not
indicated
between E4
plug pin 2 to 4.
check wiring and connection from E4 plug to
HSI receiving plug
replace HSI Assembly
continuity
is present
resistance should be between 11 and 20 Ohms
at a temperature of 77°F
voltage is not present
between E4, Pin 2
to ground
replace ignition board
volta
g
e
is
p
resent
continue
voltage
is not present
between
E4, Pin 4
to
g
round
check wiring and plug connections to HSI
replace HSI
voltage
is present
note igntion board, Flash code LED
HSI should work
Check E4 pin 4 to Ground
Check E4 pin 2 to Ground
Conditions:
Power on
Plugs in receptacles
Inducer on
24V at ignition board
E1, Pin 10
No Power to igniter
Note: Flash code of LED
Check E1 pin 10
24V
Continuity Test
E4 Plug