Question about AO Smith 2 Hp Spl 3450rpm M56 Frame 115/230 Volts Replacement Air Compressor Motor Electric Motor No.B381

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Compressor bad I have a 51/2 year old frigidaire refrigerator that the compressor has gone bad in. One month ago replaced relay overload start capacitor (3 in 1) when it stopped cooling. Now the compressor has grounded out.(checked with ohm meter) Any advice if I should replace compressor or buy new refrigerator. Will putting the 3in1 on the unit for this past month mess up anything else in the refrigerator? Thank you for any advice, I am very upset and confused on what to do.

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I would think that compressor would cost a lot of money.So if I were you I would buy a new refrigerator .

Posted on Feb 12, 2009

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I have an old air compressor that I have replaced the motor magstart and pressure switch on the motor is a 220 / 240 volt 5 horsepower motor it also has a low pressure oil cutoff switch does anybody have a...

Control: L1-SS-P-O-OL-OL-M-L2 In series, L1 is line 1, SS is start/stop switch, P is pressure switch, O is oil switch, OL is overload contact, M is magnetic coil (solenoid), L2 is line 2.
The voltage of M must be rated for the control voltage, across the line voltage (240V) or of a control transformer voltage, e.g. 240v/24v. A control voltage would be wired across the line, to L1 and L2.
Power: L1-T1-OL-M1, L2-T2-OL-M2. Line one to Line 1 on contactor, T1 on contactor jumpered to OL (overload heater) and out the overload heater terminal M1 to the motor terminal 1. Same for line 2, Line 2 to L2 on contactor, T2 on contactor jumpered to OL (overload heater) and out the heater overload terminal to M2 motor terminal.
The heater overload relays needs to be chosen by the motor full load current, a chart is given with a motor starter on selecting heater size. If no chart is available, go 115% of the motor FLA (full load amps) to select a heater size. E.G. 25 FLA motor at 115% is 28.75a. Sorry, no schematic available now, draw your own from this info. If using 3 phase, add the third line as duplicating one other line1 or line 2

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1 Answer

Central pneumatic 61693 problems

Without seeing and being able to do hands-on trouble-shooting I can only make a shot-in-the dark analysis.

I, years ago had a similar situation, and it turned out that my compressor was one which REQUIRED LUBRICATING OIL IN THE CRANKCASE [just like a 4-cycle lawnmower engine].

I had failed to regularly check the oil level and over 4 or 5 years it had "used up" the oil and was beginning to run dry. Dry bearings build additional friction which will cause "drag" and slow the compressor RPM!!!!! That could explain the inability of your compressor to exceed 20 to 30 Psi!

With enough dry running, the bearings within the compressor will eventually totally wear out, and FREEZE-UP, locking the compressor up. Once that happens, the compressor will have to be replaced, OR OVERHAULED, just like you would do with a frozen bearing in a lawnmower engine!!!!!

IF, and I EMPHASIZE IF, RIGHT AWAY you properly lubricate the compressor [IF it uses crankcase oil] you MAY extend the life a little while longer, but that no cold start, and low high pressure capability suggest that the bearing(s) is/are dragging badly already.

If your compressor is an "oil-less" type, then an overhaul or replacement will probably be necessary.

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could be an auxilary contact used as seal in or holding contact

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May 02, 2012 | Campbell Hausfeld Air Tools & Compressors

1 Answer

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Theres a reason it got hot so you need to find that out before a restart attempt.

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If your problem is that it never get above the 80 psi pressure, no matter how you adjust the pressure setting.
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Weather King 10AJA6001AH Air Conditioner with bad compressor

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Oct 04, 2008 | Air Tools & Compressors

1 Answer

Refrigerator not working but only bulb lights

Unplug the refrigerator and reinstall your relay. Then plug in the refrigerator and check across the two terminals for power. You can use a light to test across the terminals as follows: With a light bulb in a socket with two wires coming from it. Touch the two wires to the terminals that the main wires are connected to. The light should come on. If the light does not come on your have no power to the compressor.

Next locate the thermostat where you adjust the temperature. Behind the knob will be two wires connected to the thermostat. with the refrigerator unplugged connect the two wires together in some way. Plug in the refrigerator and if it starts and runs the thermostat must be replaced.

I hope you find this of some help. I am from the USA and am not familiar with Italian made products.

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