Transformer (continued), Step 3 24 vac from transformer – State Industries Utra-Force STC-077 User 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

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.