Install Instructions

44 Page
ERROR CODES
-General-
• The units have self-diagnostic function 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 remote
controller.
• Consult with the table on the following pages for the description of each error code.
-Single unit Installaons-
Example: If your unit has the “321” error code (which signifies an inlet thermistor failure)
• Remote controller 9009069005 (TM-RE42): “321” will be displayed on the screen in its entirety.
• Water heater: The green LED on the computer board will be blinking two times.
-Easy-Link System-
(For the 510U (T-D2U) 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 9009069005 (TM-RE42): “321” and "2" will intermittently flash on the display. And
it shows that Unit #2 has the error.
Troubleshoong
Owner's Guide
Green LED
110U (T-KJr2U) and 310U (T-K4U) models
Error code on the computer board
Error code on the remote
controller 9009069005 (TM-RE42)
Unit #Error code
• Parent unit: This unit will not display anything,as
the error code does not pertain to it.
•Unit #2: The green LED on the computer
board will be blinking two times, just like in the
single unit example.
• Unit #3 and #4: These units will not display
anything, as the error code does not pertain to
them.
Error code
510U (T-D2U) model
Green LED
9009069005 (TM-RE42)
Unit #1
PARENT
Unit #2
CHILD
Unit #4
CHILD
Unit #3
CHILD