Si10-417
Troubleshooting
Service Diagnosis
33
5.1.6 Shutter Drive Motor / Shutter Limit Switch
Abnormality
Remote
Controller
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
Trouble
shooting
Check No.3
Refer to
P.150
Caution
Be sure to turn off power switch before connect or
disconnect connector, or parts damage may be occurred.
Turn off the power.
Check No. 3
Check the limit switch
continuity.
Remove such
substance.
Replace the limit
switch.
Foreign
substance in the shutter
structure?
YES
NO
Shutter closed?
NO
NO
YES
YES
Limit
switch on power?
Open the shutter and turn on
the power.
A
2A
Si10-417.fm Page 33 Wednesday, September 22, 2004 6:38 PM
