Compressor Faults - Carrier PRO-DIALOG Plus 30GK Series Installation, Operation & Maintenance Instructions Manual

Air-cooled liquid chillers

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Table Of Contents

Table of Contents

6.4.1 - Compressor faults

6.4.1.1 - General

Each compressor is protected against multiple faults by two

digital inputs located on the control board. If one of these

inputs opens, it causes an immediate shutdown on the

compressor without any action from the basic board.

6.4.1.2 - Compressor protection devices

On PRO-DIALOG Plus units, compressors are individually

protected by the following devices connected to the digital

inputs on the compressor control board:

ALARM CODE DESCRIPTIONS

Code

Alarm name

101

DGT fault, compressor A1

102

Starter Guard fault compressor A1

201

DGT fault, compressor A2

202

Starter Guard fault compressor A 2

301

DGT fault, compressor A3

302

Starter Guard fault compressor A 3

401

DGT fault, compressor A4

402

Starter Guard fault compressor A 4

501

DGT fault, compressor B1

502

Starter Guard fault compressor B1

601

DGT fault, compressor B2

602

Starter Guard fault compressor B 2

701

DGT fault, compressor B3

702

Starter Guard fault compressor B3

801

DGT fault, compressor B4

802

Starter Guard fault compressor B4

DGT (only for units with low-temperature option):

The discharge gas thermostat detects and protects the

compressor against abnormally high discharge temperatures.

Starter Guard:

This board patented by Carrier (also called AM board)

monitors both the compressor regime and the status of its

crankcase heaters which ensure correct lubrication when the

compressor starts.

Action

Pumpdown

Circuit A shut down

Compressor A2 shut down

Compressor A3 shut down

Compressor A4 shut down

Circuit B shut down

Compressor B2 shut down

Compressor B3 shut down

Compressor B4 shut down

Reset type

Probable cause

Manual