Single phase, two cap motor

MisterBill2

Joined Jan 23, 2018
19,453
OK, and evidently it has enough power to start under some load. None of my compressers will start with a full back pressure load. So tghe need for unloading wil vary with the torque capability of the motor.
 

Thread Starter

s34n

Joined Jan 1, 2024
19
Opened the old motor, and it looks like the start winding got hot.
The two red wires that go into the motor do just join together at the winding connection.

Opened the old start capacitor. Think its a Comar, 262/CR404U, Autotarabile.
In the top sits the 40uf cap with the two white wires running through the centre of it, and underneath that there is a circuit board with a Finder 4061 mechanical relay.

canvas.png

Resistor R1 looks to have gotten hot, couldnt get a resistance reading from it.
Diode D2 didnt have any info on it. Could it be a Zener? Checked it up to 30Vdc and did nothing. Checked it in series with a resistor on 230Vdc and it seemed to sit at about 125V.

Sorry about the drawing, using chrome canvas and a touch pad.

Cheers
 

MisterBill2

Joined Jan 23, 2018
19,453
Opened the old motor, and it looks like the start winding got hot.
The two red wires that go into the motor do just join together at the winding connection.

Opened the old start capacitor. Think its a Comar, 262/CR404U, Autotarabile.
In the top sits the 40uf cap with the two white wires running through the centre of it, and underneath that there is a circuit board with a Finder 4061 mechanical relay.

View attachment 317664

Resistor R1 looks to have gotten hot, couldnt get a resistance reading from it.
Diode D2 didnt have any info on it. Could it be a Zener? Checked it up to 30Vdc and did nothing. Checked it in series with a resistor on 230Vdc and it seemed to sit at about 125V.

Sorry about the drawing, using chrome canvas and a touch pad.

Cheers
Really, it is a clear and legible drawing, No apology needed.
 
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