User Guide

67 Page
*If the 540P Indoor model is the
PARENT unit and the remote controller
is connected to the unit, the remote
controller has priority over the built-in
controller.
-How error codes display in an Easy-Link System-
Error codes will be displayed differently with units installed in an Easy-Link System. It will show both the
error code and which unit has the error code. Below is an example of how the error code of "321" is
displayed in an Easy-Link System.
Example: Unit #2 with a “321” error code (inlet thermistor failure)
 Indicator on the built-in controller
and/or remote controller of Parent unit*:
“321” and "2" will alternately flash on
the display.
Unit #Error code
Outdoor model installation
 Unit #2:
The green LED on the computer board will flash
twice, just like in the single unit example.
 Unit #3 and #4:
The green LED on the computer board will stay
off.
Indoor model installation
 Unit #2:
"321" will flash on
the display. The green LED on
the computer board will be flashing
twice, just like in the single
unit example.
 Unit #3 and #4:
These units will not display anything,
as the error code does not pertain to them.
Unit #1
PARENT
Unit #2
CHILD
Unit #4
CHILD
Unit #3
CHILD
100276687
(TM-RE43)
540P 540 540 540
Error code Green LED
on on on on
on on
off off off off off
321
100276687
(TM-RE43)
Unit #1
PARENT
Unit #2
CHILD
Unit #3
CHILD
Unit #4
CHILD
Green LED on
the computer board
540P 540 540 540
Troubleshoong
Owner's Guide