Takagi AT-KJr3U-IN Installation Manual And Owner's Manual page 50

-For the 510U (AT-D3U-IN/OS) model in an Easy-Link System-
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 error code of "321" is displayed in an Easy-Link System.
Example: If Unit #2 has the "321" error code (inlet thermistor failure)
• Indicator on the built-in controller
and/or remote controller of Parent unit:
"321" and "2" will intermittently flash on
the display.
Indoor model installation
• Unit #2:
"321" will intermittently flash on
the display. The green LED on
the computer board will be flashing
twice, 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.
Outdoor model installation
• Unit #2:
The green LED on the computer board will be
flashing twice, just like in the single unit example.
• Unit #3 and #4:
The green LED on the computer board will stay off.
Error code
9009069005 (TM-RE42)
Unit #1
Unit #2
PARENT
9009069005 (TM-RE42)
Unit #1
Unit #2
PARENT
Green LED on
the computer board
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Unit #
Unit #3
CHILD CHILD
Unit #3
CHILD CHILD
Error code Green LED
321
on on on
off off off
Unit #4
CHILD
Unit #4
CHILD
on on
on
off off