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Takagi AT-K5U-OS User Manual

Takagi AT-K5U-OS
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-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.
Unit #Error code
9009069005 (TM-RE42)
Unit #1
PARENT
Unit #2
CHILD
Unit #4
CHILD
Unit #3
CHILD
9009069005 (TM-RE42)
Unit #1
PARENT
Unit #2
CHILD
Unit #4
CHILD
Unit #3
CHILD
Error code Green LED
on on on on
on on
off off off off off
321
Green LED on
the computer board
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.
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.

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Takagi AT-K5U-OS Specifications

General IconGeneral
BrandTakagi
ModelAT-K5U-OS
CategoryWater Heater
LanguageEnglish

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