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Technical Training Department
Ashland City, Tennessee
SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
©2003
TEST 5 - CALLING FOR HEAT – NO
INDUCER OPERATION
Conditions:
Power on
Plugs in Receptacles
Red “ Call for Heat” LED-ON
Inducer “Off”
Note flash code on ignition control board
diagnostic LED
TEST 5
115-120 V Check to Inducer
Test on Ignition Board 4 Pin Receptacle E4
If…
...then
pin 1 to ground check
has no voltage
•
reset control by interrupting power - note
possible reasons for this from flashing LED code
•
replace igntion board
pin 1 to ground
has voltage
proceed
pin 3 to ground
has no voltage
•
check wiring harness and plugs
•
replace inducer
Water Heater
Control
Ignition Control Board
Display
LED’s
Diagnostic
LED
E4