T-H3 Installation Manual
53 Page
PROBLEM SOLUTIONS
REMOTE CONTROLLER
Controller does not
display anything when
the power button is
turned on.
Make sure the unit is supplied with power.
Make sure the connection to the unit is correct. (pp. 35 and 36)
NOTICE:
When the unit has not operated for five minutes or more, the display
of the controllers turns off to conserve energy.
When the
controller turned
ON, STAND BY LED
is lit.
Built-in controller
Although the controller of the parent unit will display the set
temperature at the Easy-Link System, the controller of the child unit
will not display the set temperature.
An ERROR code is
displayed.
Please see pp. 53 to 56.
EASY-LINK SYSTEM
540 model only
How are the unit
numbers assigned?
For an Easy-Link System, the Parent unit is always labeled #1 and all
other subsequent Child units are numbered randomly.
To check which numbers are assigned to which Child units, push the
increase button on the computer board of any Child unit as shown
below. The unit number will be displayed on the temperature con-
troller of the Child unit and/or the remote controller of the Child
unit, if installed. (Refer to pp. 37 and 38.)
unit number
Troubleshoong
Owner's Guide
ERROR CODES
-General-
The units have self-diagnostic functions for safety and convenience when troubleshooting.
If there is a problem with the installation or the unit, the error code will be displayed on the built-in
controller and remote controller.
Consult the table on the following pages for the description of each error code.
Error code indicator on
the temperature controller
Error code indicator on the remote
controller
Error code on the computer board
Indicated by 1/2-second flashes on the Green LED.
240 and 340 models
Green LED
540 model
Green LED