Service manual

ESIE05-03 Troubleshooting
Part 3 – Troubleshooting 3–37
33
4
5
1
1.9.3 System malfunctions
Outdoor Unit
Malfunction
Remote
Controller
Display
Location of Malfunction Contents of Malfunction Details of
Malfunction
(Reference
Page)
Other
than PC
Board
PC Board
Outdoor
Unit
Indoor
Unit
Remote
Controller
U4
or UF
{ { — Transmission error (between
indoor and outdoor unit)
3–96
U5  — {{Transmission error (between
indoor and remote controller)
3–98
U8  — {{Transmission error between
“main” remote controller and
“sub” remote controller
3–99
UA  — { — Excessive indoor units connected
to this system.
3–100
UC  —— { Centralized address setting error 3–102
ESIE05-03.book Page 37 Wednesday, April 6, 2005 4:09 PM