Daikin R410As Service Manual page 222

Si39-302
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
"U9"
YES
has been displayed for 2
minutes or more.
NO
Turn on all indoor units.
NO
The "UA"
display blinks on the
YES
remote controllers of other
units within the same
refrigerant
system.
NO
The "A1"
display blinks on
YES
the remote controllers of
otherunits within the same
refrigerant
system.
NO
The "A9"
display blinks on
the remote controllers of YES
otherunits within the same
refrigerant
system.
NO
The "U4"
display blinks on
YES
the remote controllers of
otherunits within the same
refrigerant
system.
NO
Troubleshooting by Indication on the Remote Controller
Re-diagnose by display after
passage of 2 minutes or more.
Refer to failure diagnosis for "UA"
malfunction code.
Refer to failure diagnosis for "A1"
malfunction code.
Refer to failure diagnosis for "A9"
malfunction code.
Refer to failure diagnosis for "U4"
malfunction code.
Refer to failure diagnosis for "U5"
malfunction code.
(V2826)
211