A.O. Smith T-H3J-DV Service Manual page 60

< For multiple units in an Easy-Link system >
1. Press and hold the "HOT" and "COLD" buttons simultaneously for at least 5 seconds to enter
"Diagnostics Mode".
2. "0" will be displayed on the controller. (See Fig. 1)
3. Scroll to the desired 540 (T-H3) unit # in the easy-link system by pressing the "HOT" or the
"COLD" buttons to scroll up or down. (Fig. 2 shows that unit #2 is being selecting)
NOTE: The definition of the unit #'s:
"0" will yield information about the Easy-link system as a whole, and "1" will yield
information about the parent unit, "2", "3", & "4" will yield information about each
of the individual 540 (T-H3) models installed in the Easy-link system.
In an Easy-link system of 540 (T-H3) models, a maximum of four units of the water
heaters can be linked together.
4. Press the "INFO" button to select the desired unit #.
5. When the desired unit # is selected and fixed, scroll up or down to the needed information
(mode #) of the unit by pressing the "HOT" or "COLD" buttons.
(Fig.3 shows mode #6 is being selected.) When selecting information, please refer to the
table on p.61-62 for the proper mode #.
6. Press the "INFO" button to select the mode #, and information to which the mode # correlates to
will display on the controller. (Fig. 4)
7. When the "ON/OFF" button is pressed or 30 minutes have elapsed without pressing any buttons,
the display will return to normal.
Whole
diagnosic mode
Fig. 1
For example, the figures above show how to arrive at the outlet temperature information for Unit #2 in
an Easy-Link System.
• Although the controller of the parent unit will display the set temperature at
NOTICE
the Easy-Link system, the controller of the child unit will not display the set
temperature.
• The controller means the temperature controller and the temperature remote
controller.
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Unit # Mode #
Fig. 2
60
Page
CONFIDENTIAL
Information
Fig. 3
Ver. 1.00
Fig. 4