Installation Guide

54 Page
-Single unit Installaon-
Example: If your unit has a “321” error code (which signifies an inlet thermistor failure)
 Indicator on the built-in controller or remote controller : “321” will be displayed
on the screen.
 Green LED on the computer board: The green LED on the computer board will indicate this code with
two flashes every 1/2 second. The pattern will repeat with a three second delay between patterns.
Error code
Error code Green LED
on on on on
on on
off off off off off
321
Troubleshoong
Owner's Guide
Error Code
on the temperature
controller
Green LED
The number
of flashes
Flash paern
031 701 711
One
311 321 331 341
391 441
Two
111 121
Three
611 651 661
Four
101 941 991
Five
510 551 721
Six
on on
off
off
0.5 sec. on, 0.5 sec. off 3 sec. off
Error Indication
-Easy-Link System-
(540 model only)
Error codes will be displayed differently with units installed in an Easy-Link System. The built-in/remote
controller installed in a PARENT unit will show both the error code and which unit has the error code.
Below is an example of how an error code of "321" is displayed in an Easy-Link System.
Example: If Unit #2 has the “321” error code (inlet thermistor failure)
Indoor model installation
Indicator on the built-in and/or remote controller of Parent unit*: “321” and "2" will alternately flash
on the display.
Unit #1
PARENT
Unit #2
CHILD
Unit #4
CHILD
Unit #3
CHILD
Unit #2: "321" will flash
intermittently on the
display. The green LED
on the computer board
will flash twice, just like
in the single unit exam-
ple.
Unit #3 and #4: These
units will not display
anything, as the error
code does not pertain
to them.
*If the remote controller is installed in the Parent unit, the remote controller has priority over the built-in
controllers.