State Water Heaters Utra-Force STC-077 Service Handbook page 21

STEP 3 24 VAC FROM TRANSFORMER
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.
IF...
24 VAC is not present
24 VAC is present
Technical Training Department
STC-077
S U F S E R V I C E
T R O U B L E S H O O T I N G
TRANSFORMER (CONTINUED)
THEN
replace transformer if Steps 1 and 2 were performed and results were successful.
continue to Step 4.
20
H A N D B O O K
State Water Heaters
Ashland City, Tennessee © 2004