Error Codes - A.O. Smith 110 Troubleshooting Manual

5.3 TROUBLESHOOTING ‐ ERROR CODES
•
All units are self diagnostic for safety and convenience when trouble shooting.
•
If there is a problem with the installation or the unit, it will display a numerical error code on
the Remote Controller (if installed), on the 7‐Seg LED on the computer board (510 (T‐D2)), or
the flashing red LED (110 (T‐KJr2), 310 (T‐K4)) to communicate the source of the problem.
•
Consult the following chart for the cause of each error code.
Table 2 – Error Codes
Error Code Error Code
510 (T‐D2) 110 (T‐
7‐Seg LED, KJr2), 310
remote (T‐K4)
Remote
031 03
101 10
111 11
121 12
311 31
321 32
331 N/A
391 39
441 N/A
510 51
N/A 55
611 61
651 N/A
701 70
721 72
741 74
761 N/A
991 99
Red LED
Error code on the
computer board
Figure 4 – 310 (T‐K4), 110 (T‐KJr2) Error Code outputs
Error Code
Red LED
110 (T‐KJr2),
310 (T‐K4)
1
5
3
3
2
2
N/A
2
N/A
6
6
4
N/A Abnormal Flow Adjustment Valve ( Easy‐Link System only)
1
6
N/A
N/A Communication Failure (Easy‐Link System only)
5
Error code on
the TK‐RE02
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Page
Malfunction Description
TM‐RE30 (Optional)
Incorrect Dipswitch Settings
Warning for 991 Error Code
Ignition Failure
Flame Loss
Output Thermistor
Inlet Thermistor
Mixing Thermistor
Air‐fuel Ratio Rod Failure
Flow Sensor (Easy‐Link System only)
Abnormal Gas Valves
Abnormal Solenoid Gas Valve
Abnormal Fan Motor
Computer Board Fault
False Flame Detection
Remote Controller Communication Failure
Abnormal combustion
7‐Seg LED
Error code on the
computer board
Figure 5 – 510 (T‐D2) Error Code outputs
Troubleshooting Guide
Error code on
the TM‐RE30