Manitowoc IDT1200C161 User Manual

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Part Number: 000015431 Rev 02 6/20 159

COMPRESSOR ELECTRICAL DIAGNOSTICS

The compressor does not start or will trip repeatedly on

overload.

Check Resistance (Ohm) Values

NOTE: Compressor windings can have very low ohm

values. Use a properly calibrated meter.

Perform the resistance test after the compressor cools. The

compressor dome should be cool enough to touch (below

120°F/49°C) to assure that the overload is closed and the

resistance readings will be accurate.

SINGLE PHASE COMPRESSORS

1. Disconnect power then remove the wires from the

compressor terminals.

2. The resistance values between C and S and between

C and R, when added together, should equal the

resistance value between S and R.

3. If the overload is open, there will be a resistance

reading between S and R, and open readings between

C and S and between C and R. Allow the compressor

to cool, then check the readings again.

THREE PHASE COMPRESSORS

1. Disconnect power and remove the wires from the

compressor terminals.

2. The resistance values between L1 and L2, between L2

and L3, and between L3 and L1 should all be equal.

3. If the overload is open, there will be open readings

between L1 and L2, between L2 and L3, and between

L3 and L1. Allow the compressor to cool, then check

the readings again.

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Manitowoc IDT1200C161 IDT1200C-161 30" Indigo NXT QuietQube Series Remote Cooled Modular Ice Machine with 1142 lbs. Daily Ice Production, easyTouch Display, Acoustical Ice Sensing Probe and