Error Codes - Takagi AT-KJr3U-IN Installation Manual And Owner's Manual

• The units have self-diagnostic functions for safety and convenience when troubleshooting.
• If there is a problem with the installation or the unit, the error code will be displayed on the built-in
controller or remote controller.
• Consult the table on the following pages for the description of each error code.
Error code indicator on
the built-in controller
Example: If your unit has the "321" error code (which signifies an inlet thermistor failure)
• Indicator on the built-in controller
and/or remote controller: "321" will be displayed
• Green LED on the computer board: The green LED on the computer board will indicate this code with
two flashes every 1/2 second. The pattern will repeat with a three second delay between patterns.
Error Indication
Error Code
on the temperature
controller
031 701 711
311 321 331
391 441
111 121
611 651 661
101 991
510 551 721

ERROR CODES

-General-
Error code indicator on
the remote controller
-Single unit Installations-
on the screen in its entirety.
Error code
321
on on
off off
The number
of flashes
One
on
Two
Three
Four
Five
Six
0.5 sec. on, O.5 sec. off
49
Page
110U and 310U 510U (AT-D3U-IN/OS)
(AT-KJr3/K5-IN/OS)
Green LED flashes error code
Green LED
on on
on on
off off off
Green LED
Flash pattern
on
off
off
3 sec. off
Owner's Guide
Troubleshooting
Error code