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#29432 - 06/08/20 03:45 PM Otis 23 UCL Contorller F4C Fusing  
Joined: Aug 2014
Posts: 16
cshields Offline
stranger
cshields  Offline
stranger

Joined: Aug 2014
Posts: 16
Anyone know the correct size for the F4C fuse on a Otis 23UCL Controller. I found a 15AMP time delay here on a job and the insulation on the wires associated with this circuit are is begining to crack and melt and the wires were extremely hot. All other fuses on the terminal block are standard 10 AMP. I looked in the other controller on the job and it had a 6A standard fuse. The prints do not say what size fuse it needs. Pictures are attached.

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Fuse block.jpg (27 downloads)
#29441 - 06/10/20 05:08 AM Re: Otis 23 UCL Contorller F4C Fusing [Re: cshields]  
Joined: Nov 2009
Posts: 408
Johnny Offline
Journeyman
Johnny  Offline
Journeyman

Joined: Nov 2009
Posts: 408
Portland. Oregon
Look on the back of the controller at the fuse block. Otis printed the original value of the fuse there.

#29493 - 06/21/20 01:25 AM Re: Otis 23 UCL Contorller F4C Fusing [Re: cshields]  
Joined: Jun 2020
Posts: 21
crustyone Offline
Kiwi
crustyone  Offline
Kiwi

Joined: Jun 2020
Posts: 21
New Zealand
F4C fuses will be max 6amp but will depend on the VA of the transformer.
What is the device that the TRM is driving.?


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