Unspecified Voltage (Between Indoor Unit And Outdoor Unit)/Anti-Icing Control In Other Rooms - Daikin CTXS07LVJU Service Manual

SiUS121602E
7.4 Unspecified Voltage (Between Indoor Unit and Outdoor
Unit)/Anti-icing Control in Other Rooms
UA , UH
Error Code
Outdoor Unit LED A
Display
Method of Error A wrong connection is detected by checking the combination of indoor and outdoor units on the
Detection microcomputer.
Error Decision
Conditions
Supposed
Causes
Troubleshooting
Note: Refer to Anti-icing control for indoor unit on page 140 for detail.
Service Diagnosis
j h h h h
1 2 3 4
Anti-icing control in other rooms
Unspecified internal and/or external voltages
Mismatching of indoor and outdoor units
Anti-icing function in other rooms
Power supply voltage is not as specified.
Wrong models interconnected
Wrong indoor unit PCB or outdoor unit PCB mounted
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Error displayed while
operating?
YES
Power
supply voltage as
specified?
YES
Check the model combination.
Matched compatibly?
YES
h
5
NO
NO
NO
Troubleshooting for Outdoor Unit
The anti-icing function is
activated in other rooms.
Refer to A5.
Correct the power supply
voltage.
Match the compatible models.
Check the combination of all
connected models.
(R21922)
139