State Industries Utra-Force STC-077 - Manual (Page 21)

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
Technical Training Department State Water Heaters
STC-077
20
Ashland City, Tennessee © 2004
TRANSFORMER (CONTINUED)
STEP 3: CHECK FOR 24 VAC AT TRANSFORMER CN4 PLUG ON CONTROL BOARD.
Condition:
• CN4 is plugged into control board.
• On/Off switch is on.
Insert meter probes into back of CN4 plug on pins 3 and 4 (blue and yellow wires) with CN4
plugged in and power on.
STEP 3 24 VAC FROM TRANSFORMER
IF… THEN
24 VAC is not present replace transformer if Steps 1 and 2 were performed and results were successful.
24 VAC is present continue to Step 4.