State Industries Utra-Force STC-077 - Manual (Page 22)

S U F S E R V I C E H A N D B O O K
T R O U B L E S H O O T I N G
State Water Heaters Technical Training Department
Ashland City, Tennessee © 2004
21
STC-077
ECO CHECK
STEP 4: CHECK FOR 24 VAC BETWEEN PIN 4 ON CONTROL BOARD TERMINAL CN3 AND
GROUND.
Condition:
• Disconnect CN3 plug from control board.
• On/Off switch is on.
Check for 24 VAC between pin 4 of the CN3 terminal on the control board and ground.
STEP 4 24 VAC TO ECO
IF… THEN
24 VAC is not present
replace the control board if Steps 1, 2, and 3 have been performed and the results
were successful.
24 VAC is present continue to Step 5.