Bristol compressor: test/wiring - locked compressor?

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Old 07-16-18, 01:22 PM
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Bristol compressor: test/wiring - locked compressor?

This one is of Model H29B35Uabca, not running. found wiring problem: Of the three leads, red still attached to, Black detached and yellow lost the connector. It seemed the corrosion rusted the lead connectors.

Similar situation also happened the last year. It worked OK after reconnected the wires.

But this time was different. Re-connected wires according to the schematic and marks at the port (T1 C (black), T2 S (yellow), T3 R (red)), upon switching on, it had a glowing spot on the red lead, and no motion for the motor.

I post this because I am not sure what was there for the three lead positions before. By viewing the detached positions of the loose two, they seemed different from the schematic.

I'd appreciate it if someone can post a picture of the real wiring for the model, and if possible, also the motor winding resistances between the leads.

Thanks a lot.
 
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Old 07-16-18, 07:20 PM
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Reading the compressor terminals like reading a book you should see C then S then R.

Using an Ohm meter that reads millions of Ohms, Measure each lead to ground.
You should read an open circuit to ground from each compressor terminal.

Disconnect the wires from the compressor and check the resistance between the terminals.

Place the meter in the Ohm setting and touch the leads together and Note the reading if it isnít 0.

Measure T1 to T2, T1 to T3 and then T2 to T3.
Common to Run will have the lowest Ohm reading.
Run to Start will have the highest reading.
Common to Start will be the middle reading.

Common to Run plus Common to Start should equal the Start to Run reading.
 
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Old 07-17-18, 03:46 PM
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Hi Houston204:

Your description matches the chart.
Thank you,
 
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Old 07-17-18, 04:29 PM
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Your repair probably failed because you just use some crimp connectors instead of a Qwik Lug repair kit.


https://arnoldservice.com/product/qw...al-repair-kit/
 
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Old 07-29-18, 04:48 PM
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Locked Compressor?

This is a continuation of
Bristol compressor test /wiring
https://www.doityourself.com/forum/s...archid=2040572

For Bristol compressor Model H29B35Uabca. The new problem

The correct wiring made this compressor running, worked for about two weeks.

But, as it has burnt the connector once (or twice) before,it happened again today.

The circuit beakers tripped, after a spark at the connection box at the compressor upon switching ON.

My guess is the compressor winding is OK, but the auto-overload inside the compressor failed, causing the line over-current.

Any feedback and diagnostic suggestions?

Thanks.
 
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Old 07-29-18, 05:11 PM
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In the early post I thought the connectors were rusted, they could be burnt with the sign of black mark. So this is not the first time.
 
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Old 07-29-18, 06:24 PM
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Same topic - threads combined.

The overload should reset after the compressor cools back off.
Those connections must all be clean and solid or your problems will continue.
 
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Old 07-29-18, 07:14 PM
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I will clean the connectors, using the kit recommended by Houston204.
Thanks to both of you.
 
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