A.O. Smith 240 T-H3J Service Manual page 47

11. Fault Analysis & Specifications
Remarks:
Natural of Fault
1 Check the power supply
controller, even when
remote is turned on.
get hot water at the
1 Check cross pluming between cold water lines and hot water lines.
2 Check whether the gas supply pressure is enough.
enough
3 Check whether the temperature setting is too low.
1 Check whether the temperature setting is too high.
not available when a
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
(Refer to section 12-2)
[2] Check the power supply line to the water heater
Normal: 120 VAC between (white-black)
Normal: 120 VAC between (white-black)
[1] No voltage at the controller
Normal: 11 to 25 VDC between (white-black)
Normal: 11 to 25 VDC between (white-black)
the distance or the bigger the pipes, the longer it will take to get hot
water.
a hot water recirculation system.
turned on.
least 0.5 GM through the water heater.
47
Diagnosis
Page
CONFIDENTIAL
Ver. 1.00
Check
point
A
A1
A2
F