Eco check, 24 v, T. r – A.O. Smith 960 through 967 User Manual
Page 22: 24 vac to eco
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BTH 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
ECO CHECK
STEP 4
24 VAC TO ECO
24 V
m
Black Black
Redj I j |Red
1
2
3
I ^'12
•
7^CN8
◄-----
1
2
Ground
_ t.
r
T y
^Temperature/
Eco Probe (Upper)
^Temperature
Probe #2 (Lower)
-Igniter
■CN5 -
I
1 I 'i A
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.
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.
A. O. Smith Water Products Co.
Ashland City, Tennessee © 2004
21
Technical Training Department
TC-044 Revision 6