A.O. Smith T-M50 ASME Service Manual page 49

< For multiple units in the Multi-unit system and the 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 remote controller. (See Fig. 1)
3. Scroll to the desired T-M50 unit # in the multi-unit system or the easy-link system by pressing the
"HOT" or the "COLD" buttons to scroll up or down.
NOTE: The definition of the unit #'s:
"0" will yield information about the Multi-unit system or the Easy-link system as a whole,
and numbers "1", "2", "3"... "10" will yield information about each of the individual
T-M50's installed in the Multi-unit system and Easy-link system.
In the Multi-unit system of T-M50, a maximum of ten units can be linked together. For the
Easy-link system, a maximum of four units can be linked as well.
4. Press the "INFO" button to fix the desired unit #.
5. When the desired unit # is fixed (Fig. 2 shows that unit #10 is being selecting), scroll up or down to the
needed combustion section of the unit by pressing the "HOT" or "COLD" buttons.
6. When the desired combustion section is fixed (Fig.3 shows mode #1 the left side combustion unit is
being fixed.), scroll up or down to the needed information (mode #) of the combustion by pressing the
"HOT" or "COLD" buttons.
7. Press the "INFO" button to select the mode #, and information to which the mode # correlates to will
display on the remote controller. (Fig.4 shows mode #6 is being fixed.) When selecting information,
please refer to the table on p.50 for the proper mode #.
8. The information of the mode # will display on the remote controller. (Fig.5)
9. When the "ON/OFF" button is pressed or 5 minutes have elapsed without pressing any buttons, the
display will return to normal.
Whole
diagnostic mode
Fig.1
For example, the figures above show how to arrive at the mixing temperature information for the
left side combustion section of unit #10 in a Multi-Unit System.
Combustion
Unit #
section #
Fig.2
T-M50 / T-M50 ASME Service Manual
Fig.3
49
CONFIDENTIAL
Mode# Information
Fig.4
Fig.5
Ver. 1.05