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» Film-Tech Forum   » Operations   » Digital Cinema Forum   » AC Blower Interlock in Christie CP2220

Author Topic: AC Blower Interlock in Christie CP2220
Ariel Vocal
Film Handler

Posts: 20
From: Cochabamba, Cochabamba / Bolivia
Registered: Apr 2012

 - posted 07-09-2017 12:09 PM      Profile for Ariel Vocal     Send New Private Message       Edit/Delete Post 
Hi All!
I recently started working with a Christie CP2220 projector, in the last days when i turn it on in the morning i get a critical error that says: [Mad] AC Blower Interlock, some of you know where this blower is and why this error appears when i turn on the projector ?.


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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12207
From: Annapolis, MD
Registered: Dec 1999

 - posted 07-09-2017 08:23 PM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
It is right behind the reflector at the top of the projector. Open the lamp door and it will be looking at you on the right. There is an air flow switch checking its intake. Note, the problem could be the blower or the switch itself (or even the Environmental Board).

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Dave Macaulay
Film God

Posts: 2133
From: Toronto, Canada
Registered: Apr 2001

 - posted 07-10-2017 06:53 AM      Profile for Dave Macaulay   Email Dave Macaulay   Send New Private Message       Edit/Delete Post 
These fans suck unfiltered air and don't enjoy popcorn smoke. If you can smell popcorn in the booth... expect some fan cleaning. I have found fans close to completely clogged with grease/dust crud. The airflow switch gets slow to move at low airflow which sounds like what you're seeing.
If the blower vanes are reasonably clean check the airflow switch, reseat its connector, and reseat the projector boards.
Reseating the boards will break marriage so don't do that unless you know the marriage procedure.

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Jim Cassedy
Phenomenal Film Handler

Posts: 1553
From: San Francisco, CA
Registered: Dec 2006

 - posted 07-10-2017 09:12 AM      Profile for Jim Cassedy   Email Jim Cassedy   Send New Private Message       Edit/Delete Post 
I've had the fan switch get "stuck" a couple of times on one of
these projectors. In my case slightly re-positoning the "vane"
on the switch helped fix it.

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