Error Codes - Takagi T-H2-DV Installation Manual And Owner's Manual

x T H2 DV/T H2 OS units are self diagnostic for safety and convenience when trouble shooting.
x If there is a problem with the installation or the unit, it will display a numerical error code on the 3
digit 7 Seg. LED on the computer board (visible through a window on the front cover) or TM RE30 (if
installed) to communicate the source of the problem.
x Consult the table on the following page for the cause of each error code.
T H2 SV/T H2 OS
The 7 Seg LED and TM RE30 displays the whole 3 digit error code.
Example: If your unit has the "321" error code (inlet thermistor failure)
x Water heater: It will display "321" on the 7 Seg LED.
x TM RE30: It will display "321" on its screen.
The 7 Seg LED of the individual unit with the error in question displays the whole 3 digit error code.
The TM RE30 (if installed) displays a 3 digit number which signifies which unit has the error, and what
the error code is.
Example: If Unit #2 has the "321" error code (inlet thermistor failure)
x Water heater #2: It will display "321" on the 7 Seg LED, just like in the Single Unit example.
x
TM RE30: It will display "232" on its screen. The first "2" indicates that Unit #2 has the error. The
"32" indicates the first two digits of the "321" error code.
Unit #1
MASTER
TM RE30

ERROR CODES

7 Seg LED
Error code on the computer board
Single unit installations
Easy Link system
Unit #2
unit SLAVE unit
43
Unit #3 Unit #4
SLAVE unit SLAVE unit
Page
Troubleshooting
Error code on the TM RE30