Specifications

Printed in the U.S.A.

AE8-1368 R2

Protector Trip

This fault pertains to 2D and 3D compressors with internal line

break protectors. The presence of motor voltage without current

flow is the symptom used to detect a protector trip. Current flow

is measured by the Current Sensing Module (“CT”, for Current

Transducer)

Is the

compressor

running?

Normal Operation

The internal protector

has tripped. The

compressor will restart

when the motor has

adequately cooled

Possible Causes:

1.) Motor lead not passing through CT

2.) CT not plugged into sensor module, or pins

in connector not engaged

3.) Faulty CT – check resistance of CT through

pins 1 and 2 of the connector (see below)

4.) Faulty sensor module

Yes

View of the open end of

the CT connector that

plugs into the sensor

module

Resistance between pins

1 and 2 = 60 – 80 ohms

6.20