Posted By: rdoyle
Monarch Elevator & Machine Co Control Question - 03/21/23 02:57 PM
First post.
I am working on the controls on a 1911 Monarch Model BB3 freight elevator. They blew a control fuse and when they replaced it the control box hummed so they turned it off. I replaced the fuse and when you power up the contactor for the UP direction tries to pull in but does not pull in enough to engage the motor. I disconnected the coil of the UP contactor and it powers up fine and manually engaging the contactor the motor runs fine. I assume that the very old coil is bad but do not understand why the elevator attempts to raise on power-up. All of the switches seem fine. The car is between floors; maybe it defaults up on power up?
Are these very old coils available, or would it be best to completely rewire the controls? The schematic for this unit is completely unreadable, any ideas where to find one?
[img]https://www.fndphoto.com/Photography/Work/n-x3JG7Q/Miscellaneous/i-fM6sVn4/A [/img]
[img]https://www.fndphoto.com/Photography/Work/n-x3JG7Q/Miscellaneous/i-g8mdZS3/A [/img]
I am working on the controls on a 1911 Monarch Model BB3 freight elevator. They blew a control fuse and when they replaced it the control box hummed so they turned it off. I replaced the fuse and when you power up the contactor for the UP direction tries to pull in but does not pull in enough to engage the motor. I disconnected the coil of the UP contactor and it powers up fine and manually engaging the contactor the motor runs fine. I assume that the very old coil is bad but do not understand why the elevator attempts to raise on power-up. All of the switches seem fine. The car is between floors; maybe it defaults up on power up?
Are these very old coils available, or would it be best to completely rewire the controls? The schematic for this unit is completely unreadable, any ideas where to find one?
[img]https:/
[img]https:/