Whirlpool Compactors User Manual download pdf (Page 66)

Motor Start Relay

Introduction

1. The motor start relay protects the motor.

2. The motor start relay is a “current sensitive” relay.

3. At instant of start, current going through the coil is high enough o close the normally open

contact of the relay.

a. At that point, the timer contact would direct the current to either the “wash” or the “drain”

start winding.

4. One or two seconds after the motor starts, the current through the relay drops back to its

normal operating current, which is too low to keep the normally open contact closed.

a. The motor will continue to run through the coil windings of the motor start relay.

5. If the start winds do not drop out, the motor will burn up.

Testing

1. Disconnect dishwasher from electrical source.

2. Disconnect the harness leads and remove the relay.

3. Set the meter on the Rx1 scale.

4. Zero the meter.

5. Turn the relay upside down and check between the contacts for continuity.

a. The relay should be closed and read 0 resistance in this position.

6. Turn the relay right side up and check between the contacts for continuity.

a. The relay should be open in this position and read infinite resistance.

7. Measure resistance through the coil by placing the probes on contacts.

a. A good coil will read less than 1 ohm.

1 2 ... 61 62 63 64 65 66 67 68 69 70 71 ... 101 102

No comments

Whirlpool Compactors User Manual Page 66