Takagi T-K3 Service Manual

T-K3 Service Manual
Ver. 1.05
45
CONFI DENTIAL
12-2. The error-code button: Verifying f unctionalit y of computer board, Displaying
error code history, and Clearing error code history memory
The T-K3 has as error-code button on the computer
board that provides three main functions. The button
is located next to the 7-seg LED (please look at the
picture to the right).
A. Verifying functionality of computer board
1. Check the pow er supply to the GFI
(If the red light turns on after pressing the “test“ button
on the GFI, the GFI is receiv ing power. After verifying
power, press the “reset“ button to turn off the light.)
2. Briefly press the error-code button (do not
hold dow n the button).
3. If the computer board w orks properly, the
7-seg LED shows the most recent error code
in its error code history (or a bar “—“ if there
are no error codes saved to memory), as
show n in the picture to the right.
B. Displaying error code history
1. Briefly press the error-code button (do not hold dow n the button).
2. If the T-K3 has had prior error codes, the 7-seg LED w ill display the most recent error
code first. Pressing the button again w ill d isplay the 2
nd
most recent error code and so
on (Computer saves a maximum of 10 error codes). If the T-K3 has never had any error
codes, the 7-seg LED w ill display a bar “—“.
C. Clearing error code history memory
1. Press and hold the error-code button for at
least 5 seconds.
2. The 7-seg LED w ill display “C”, “L” and “r” in
succession to signify that the computer board
memory has been erased of all error codes.
Error-code button
7-seg LED

Takagi T-K3 Specifications

General

Type	Tankless
Installation Type	Indoor
Maximum BTU Input	199, 000 BTU/h
Gas Connection Size	3/4"
Vent Size	3"
Hot Water Flow Rate (at 35°C rise)	6.6 GPM
Maximum Input	199, 000 BTU/h