Si10-417
Troubleshooting
Service Diagnosis
147
5.3.12
Anti-icing Function in Other Rooms /
Unspecified Voltage (between Indoor and
Outdoor Units)
Remote
Controller
Display
UA, UH
Outdoor
Unit LED
Display
A
5
1
1
2
1
3
1
4
1
Method of
Malfunction
Detection
A wrong connection is detected by checking the
combination of indoor and outdoor units on the
microcomputer.
Malfunction
Decision
Conditions
Operation halt due to the anti-icing function in other
rooms
Operation halt due to unspecified internal and/or
external voltages
Operation halt due to mismatching of indoor and
outdoor units
Supposed
Causes
Operation halt due to the anti-icing function in other
rooms
Wrong connections at the indoor unit
PCB wrongly connected
Trouble
shooting
(R3066)
Error-displaying
air-conditioner
running?
NO
YES
Supply voltage
as specified?
NO
Check the model name.
YES
Normal?
NO
YES
Check the combination of all
the models being connected.
The freeze protection
function is activated in
other rooms. Refer to
A5.
Correct.
Reconnect.
Caution
Be sure to turn off power switch before connect or
disconnect connector, or parts damage may be occurred.
Si10-417.fm Page 147 Wednesday, September 22, 2004 6:38 PM
