Daikin FTKS50BVMB, Service Manual

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SiEN18-622 Troubleshooting for RA Indoor Unit
Troubleshooting 329
4.5 Shutter Drive Motor / Shutter Limit Switch Abnormality
Remote Control
Display
C7
Method of
Malfunction
Detection The shutter open / close performance is detected by the limit switch attached on its structure. In
this way, the shutter drive motor and the shutter limit switch are checked for failure.
Malfunction
Decision
Conditions When the shutter is open, the limit switch is closed.
Supposed
Causes „ Shutter drive motor defective
„ Shutter limit switch defective
„
Shutter itself deformed (warped)
„ Shutter's sealing material too thick
„ Detection error by broken relay harness or disconnected connector
„
Detection error due to defective PCB (2)
„ Foreign substance in blow port
Troubleshooting
Check No.03
Refer to P.330
Turn off the power.
Check No. 03
Check the limit switch continuity.
(Q0410)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Foreign substance in
the shutter structure?
Shutter closed?
Shutter opening itself?
YES
Relay harness
broken or connector
disconnected?
Limit switch on power?
Open the shutter and turn on the
power.
YES
YES
YES
NO
NO
NO
NO
NO
Remove such substance.
Replace the limit switch.
Reconnect the connector or
replace the relay harness.
Replace the shutter drive
motor or the PCB (2).
Check the shutter's sealing
material.
Check the shutter for
deformation or its sealing
material.
YES