Takagi T-K3 Service Manual

T-K3 Service Manual
Ver. 1.05
46
CONFI DENTIAL
12-3. Clearing the “991” error code
The T-K3’s “991” error code signifies imperfect (abnormal) combustion, caused by insufficient
intake air and/or obstructions in the exhaust.
A. If the “991” error code occurs, please check the follow ing:
1. What is the T-K3’s gas-type: liquid propane or natural gas?
2. How long has the T-K3 been installed and been in use?
3. Where is the T-K3 installed: indoor, outdoor, att ic, etc?
4. What is the altitude/elevation of the area of installation?
5. If installed indoors, how long is the vent length?
6. If installed outdoors, w hat type of vent cap is used?
7. Are there any obstructions in the intake air and/or exhaust?
B. How to clear the “991” error code (after resolving the m ain root cause of the error):
On the computer board, press and hold the INCREASE and DECREASE buttons
simultaneously for at least 3 seconds until the red light turns on. Then press reset button on
the GFI. The “991” error code should then be cleared.
Increase button
Decrease button
Red light
Press and hold the “INC” and “DEC”
buttons simultaneously f or at least 3
seconds.

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