Electrical issues with Bauer K-14

[Doug - aka "Dogfish"]

Replace the board, replace the fuse. Done. The transformer fried, blew the fuse. The heaters are fine, you can see that in the pics. And they wouldn't cause the coil on the starter not to pick up. You might still have something that caused the transformer to fry. But without seeing the schematic I can't suggest a safe way to install the new board to protect it when you energise it again. Did you locate a schematic?

---------- Post Merged at 07:40 PM ---------- Previous Post was at 07:40 PM ----------

Replace the board, replace the fuse. Done. The transformer fried, blew the fuse. The heaters are fine, you can see that in the pics. And they wouldn't cause the coil on the starter not to pick up. You might still have something that caused the transformer to fry. But without seeing the schematic I can't suggest a safe way to install the new board to protect it when you energise it again. Did you locate a schematic?

 

[Vieques Arnaud]

Replace the board, replace the fuse. Done. The transformer fried, blew the fuse. The heaters are fine, you can see that in the pics. And they wouldn't cause the coil on the starter not to pick up. You might still have something that caused the transformer to fry. But without seeing the schematic I can't suggest a safe way to install the new board to protect it when you energise it again. Did you locate a schematic?

Unfortunately I did not locate a schematic and as I said in my earlier post I am concerned that with 138V coming out of the ac-ac (step down) transformer i'm gonna continue frying things.

 

[frogman62]

What is the voltage between the two leads into the system?
208, 220 , 240?? What is the voltage between ground and either of the two hot leads?
Jim

---------- Post Merged at 04:03 PM ---------- Previous Post was at 03:54 PM ----------

Try to find this transformer:
Emerson Electrical Group
Catalog #E050
Electrical control transformer handles 220, 230, 240 also 208 gives 110, 115, 120 output
Most of my motors are 208-230/240 volt three phase or single phase
has fuse contacts also
Jim

 

[VladDiver]

Did you ever solve this issue? My k14 is doing exactly the same thing as yours has.

 

[Tracy]

Wow. You've got what I would call a mess. Looking more closely at your pictures, you've got single phase power running into your motor starter, and single phase out, but a jumper from the output side of phase 1 to the input side of phase 3? Somebody built this thing custom, and I think that you're going to have to start from scratch. It's what I would do. Is the motor 3 phase or single phase?

I know this is a really old post, but just putting it here for someone to find in the future. That is a really common way to wire single phase motors. It allows you to use a common and inexpensive three phase contactor to run a single phase motor. You basically run a loop through the third leg. It balances the amp draw on all three legs and tricks the heaters as you now have equal current. It still works and trips normally with an imbalance. It likely wasn't a hack, I have seen many Mako compressors from the factory wired this way. The control box is the same regardless of what motor they order in the unit.

 

[VladDiver]

So, on my unit, I have a P5 filtration system with Securus. Turned out when there was a short, the secures blew a fuse. I replaced the fuse, but nothing was happening. So I bypassed the whole system (joined two black wires) and the compressor started right up. Could help someone out there.