Error Codes - Takagi 110 Indoor (T-KJr2-IN) Installation Manual And Owner's Manual

• The water heaters have self-diagnostic function for safety and convenience when troubleshooting.
• If there is a problem with the installation or the unit, the 510 (T-D2) model will display a numerical
error code on the 7-Seg LED on the computer board, and the 110 (T-KJr2) and 310 (T-K4) models will
display a blinking red LED on the computer board. If a remote controller is installed, the error codes
will be displayed on the remote controller.
• Consult with the table on the following page for the description of each error code.
110 (T-KJr2) and 310 (T-K4) models
Red LED
blinks to indicate an
error.
Example: If your unit has the "321" error code (which signifies an inlet thermistor failure)
• 110 (T-KJr2) and 310 (T-K4) models: The red LED on the computer board will be blinking two times.
• If the remote controller 9007666005 (TK-RE02) is installed: It will display "32" on the screen in its entirety.
• 510 (T-D2) model: The 7-Seg LED on the computer board will display "3"..."2"..."1" in that order one
digit at a time and continually repeat.
• If the remote controller 9007603005 (TM-RE30) is installed: It will display "321" on the screen in its entirety.
-Easy-Link System for the 510 (T-D2) model only-
Error codes will be displayed differently with units installed within an Easy-Link System, not only to show
what the error code is, but to also indicate which unit within the system has the error code. Below is a
sample of how the same error code is displayed in an Easy-Link System.
Example: If Unit #2 has the "321" error code (inlet thermistor failure)
• Remote controller 9007603005 (TM-RE30): It will display "232" and on the display. The first "2"
indicates that Unit #2 has the error. The "32" indicates the first two digits of the "321" error code.
•
• Parent unit: It
"3"..."2"..."1"..."0"..."2" one digit at a
time on the 7-Seg LED. The first 3
numbers indicate the error code. The last
two numbers indicate that Unit #2 has
the error code.
• Unit #2: It will display "3"..."2"..."1 on
the 7-Seg LED, just like in the Single Unit
example.
• Unit #3 & #4: These units will not display
anything, as the error code does not per-
tain to them.

ERROR CODES

-General-
Error code on the
9007666005
(TK-RE02)
-Single unit Installations-
will display
Unit #1
PARENT
"3".."2".."1".."0".."2"
43
Page
510 (T-D2) model
7-Seg LED
Error code on the
Error code on the
computer board
Unit #2 Unit #3
CHILD CHILD
"3".."2".."1"
9007603005(TM-RE30)
Owner's Guide
Troubleshooting
9007603005
(TM-RE30)
Unit #4
CHILD