Anti-Icing Function In Other Rooms / Unspecified Voltage (Between Indoor And Outdoor Units) - Daikin Super Multi NX FFQ25B8V1B Service Manual

SiBE121021_C
7.19 Anti-icing Function in Other Rooms / Unspecified
Voltage (between Indoor and Outdoor Units)
UA , UH
Remote
Controller
Display
Outdoor Unit LED A
Display
Method of A wrong connection is detected by checking the combination of indoor and outdoor units on the
microcomputer.
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Note: Refer to "Anti-icing function" on page 333 for detail.
Service Diagnosis
j h h h h
1 2 3 4
Anti-icing function in other rooms
Unspecified internal and/or external voltages
Mismatching of indoor and outdoor units
Anti-icing function in other rooms
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
Supply voltage as
specified?
YES
Check the model combination.
Matched compatibly?
YES
Check the combination of all the
models being connected.
h
5
NO
NO
NO
Troubleshooting for Outdoor Unit
The anti-icing function is
activated in other rooms.
Refer to A5.
Correct.
Match the compatible models.
(R7151)
361