Daikin VRVIII-S, Service Manual

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SiENBE34-703 Troubleshooting by Indication on the remote control
Troubleshooting 129
3.6 “
A9
” Indoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (Y1E)
remote control
Display
A9
Applicable
Models
All indoor unit models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
!
Malfunction of moving part of electronic expansion valve
! Defect of indoor unit PC board
! Defect of connecting cable
Troubleshooting
(V2781)
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Caution
After connecting, turn the power
supply off and then back on.
Replace the moving part of the
electronic expansion valve.
Replace the connecting cable.
If you turn the power supply off
and turn on again, and it still does
not help, replace the indoor unit
PC board.
The connecting cable
is short-circuited or
disconnected.
Normal when coil
check (*1) of the
moving part of the
electronic expansion
valve is checked.
The electronic
expansion valve is
connected to X7A
of the indoor unit
PC board.
NO
NO
NO
YES
YES
YES