Shutter Drive Motor / Shutter Limit Switch Abnormality - Daikin FTKE25BVM Service Manual

Troubleshooting
5.7

Shutter Drive Motor / Shutter Limit Switch Abnormality

C7
Remote
Controller
Display
Method of 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
Detection
Malfunction When the shutter is open, the limit switch is closed.
Decision
Conditions
Supposed
Causes
Troubleshooting
Check No.3
Refer to P.206
178
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
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Turn off the power.
Foreign substance in
the shutter structure?
NO
Check No. 3
Check the limit switch continuity.
Limit switch on power?
YES
Open the shutter and turn on the
power.
Shutter closed?
YES
Shutter opening itself?
NO
YES
NO
Relay harness
NO
broken or connector
disconnected?
NO
YES
Si12-411A
Remove such substance.
Replace the limit switch.
YES
Reconnect the connector or
replace the relay harness.
Replace the shutter drive
motor or the PC board (2).
Check the shutter's sealing
material.
Check the shutter for
deformation or its sealing
material.
(Q0346)
Service Diagnosis