Daikin REYQ72, Serveice Manual

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SiUS39-602 Troubleshooting by Indication on the Remote Controller
Troubleshooting 127
2. Troubleshooting by Indication on the Remote
Controller
2.1
“
A0
”
Indoor Unit: Error of External Protection Device
Remote
Controller
Display
A0
Applicable
Models All indoor unit models
Method of
Malfunction
Detection Detect open or short circuit between external input terminals in indoor unit.
Malfunction
Decision
Conditions When an open circuit occurs between external input terminals with the remote controller set to
"external ON/OFF terminal".
Supposed
Causes
„
Actuation of external protection device
„
Improper field set
„
Defect of indoor unit PC board
Troubleshooting
(V2776)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Indoor unit PC board replacement.
Actuation of external protection
device.
Change the second code No. to
"01" or "02" .
External
protection device is
connected to terminals T1
and T2 of the indoor
unit terminal
block.
ON/OFF
input from
outside (mode No. 12,
first code No. 1) has been
set to external protection
device input (second
code No. 03)
by remote
controller.
YES
NO
NO
YES