A.O. Smith T-KJr2-OS User Manual

110 Indoor / 110 Outdoor Service Manual
Ver. 1.01
40
CONFIDENTIAL
Error Code
Diagnosis Checkpoint
12
Error code is
shown after
three failed
attempts at
ignition
5 Disconnected/damaged O.H.C.F. (Refer to section 10-12)
Visual inspection: connection/breakage of wires.
Normal: 1 Ω or less between blue & blue
C2
6 Check if hi-limit switch is properly functioning.
7 Disconnected/damaged hi-limit switch. (Refer to section 10-11)
Visual inspection: connection/breakage of wires.
Normal: 1 Ω or less between blue & blue
C1
Error Code
Malfunction description Cancellation method
31
Disconnected/short-circuited outlet thermistor Turn off the power or water supply
Diagnosis Checkpoint
1 Outlet thermistor fault   (Refer to section 10-10)
Visual inspection: connection/breakage of wires and/or debris on
thermistor.
Check voltage/resistance between black & black (#113).
Refer to Section 8 for proper range of values.
E1
Error Code
Malfunction description Cancellation method
32
Disconnected/short-circuited inlet thermistor Turn off the power or water supply
Diagnosis Checkpoint
1 Inlet thermistor fault (Refer to section 10-10)
Visual inspection: connection/breakage of wires and/or debris on
thermistor.
Check voltage/resistance between black & black (#42).
Refer to Section 8 for proper range of values.
E2
Error Code
Malfunction description Cancellation method
39
Disconnected AFR rod
Turn off
the power o
r water supply
Diagnosis Checkpoint
1 AFR rod fault   (Refer to section 10-6)
Visual inspection: connection/breakage of wires, soot on it.
I

A.O. Smith T-KJr2-OS Specifications

General

Brand	A.O. Smith
Model	T-KJr2-OS
Category	Water Heater
Language	English