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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
• Green LED on the computer board: The green LED on the computer board will indicate this code with two
flashes with a 1/2 second pause in between. The pattern will repeat with a three second pause between
patterns.
Error Indication
Error codes will be displayed differently with units installed in an Easy-Link System. The built-in/remote con-
troller 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.
*If the remote controller is connected to the Parent unit, the remote controller has priority over the built-in
controllers.
-Single unit Installation-
Error code
321
on
Error Code
on the temperature
The number
controller
of flashes
031 701 711
One
311 321 331 341
Two
391 441
111 121
Three
611 651 661
Four
101 291 941 991
Five
510 551 721
Six
-Easy-Link System-
(540H model only)
Unit #1
Unit #2
PARENT
CHILD
on the screen.
Green LED
on
on
on
on
off
off
off
off
Green LED
Flash pa�ern
on
on
off
off
0.5 sec. on, 0.5 sec. off
3 sec. off
Unit #3
Unit #4
CHILD
CHILD
59
Page
Owner's Guide
Troubleshooting
Error code
on
off
Unit #2: "321" will flash inter-
mittently on the display. The
green LED on the computer
board will flash twice, just like
in the single unit example.
Unit #3 and #4: These units will
not display anything
.
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