Daikin REYQ72, Serveice Manual

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Troubleshooting by Indication on the Remote Controller SiUS39-602
186 Troubleshooting
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
(V2826)
The "U4"
display blinks on
the remote controllers of
otherunits within the same
refrigerant
system.
Refer to failure diagnosis for "U5"
malfunction code.
Re-diagnose by display after
passage of 2 minutes or more.
NO
YES
Refer to failure diagnosis for "U4"
malfunction code.
NO
YES
"U9"
has been displayed for 2
minutes or more.
NO
Turn on all indoor units.
Refer to failure diagnosis for "A1"
malfunction code.
NO
YES
The "A1"
display blinks on
the remote controllers of
otherunits within the same
refrigerant
system.
NO
Refer to failure diagnosis for "UA"
malfunction code.
YES
The "UA"
display blinks on the
remote controllers of other
units within the same
refrigerant
system.
Refer to failure diagnosis for "A9"
malfunction code.
NO
YES
The "A9"
display blinks on
the remote controllers of
otherunits within the same
refrigerant
system.