Carrier 30GK Compressor faults 6.4.1.1 General, Compressor protection devices, Starter Guard

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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

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.

Code

Alarm name

Action

Pumpdown

Reset type

Probable cause

101

DGT fault, compressor A1

Circuit A shut down

No

Manual

Hot gas thermostat contact open

102

Starter Guard fault compressor A1

Circuit A shut down

No

Ditto

Crankcase heater fault and open motor current

 

 

 

 

 

fault detection board contact

201

DGT fault, compressor A2

Compressor A2 shut down

 

Ditto

Hot gas thermostat contact open

202

Starter Guard fault compressor A 2

Compressor A2 shut down

 

Ditto

Crankcase heater fault and open motor current

 

 

 

 

 

fault detection board contact

301

DGT fault, compressor A3

Compressor A3 shut down

 

Ditto

Hot gas thermostat contact open

302

Starter Guard fault compressor A 3

Compressor A3 shut down

 

Ditto

Crankcase heater fault and open motor current

 

 

 

 

 

fault detection board contact

401

DGT fault, compressor A4

Compressor A4 shut down

 

Ditto

Hot gas thermostat contact open

402

Starter Guard fault compressor A 4

Compressor A4 shut down

 

Ditto

Crankcase heater fault and open motor current

 

 

 

 

 

fault detection board contact

501

DGT fault, compressor B1

Circuit B shut down

No

Ditto

Hot gas thermostat contact open

502

Starter Guard fault compressor B1

Circuit B shut down

No

Ditto

Crankcase heater fault and open motor current

 

 

 

 

 

fault detection board contact

601

DGT fault, compressor B2

Compressor B2 shut down

 

Ditto

Hot gas thermostat contact open

602

Starter Guard fault compressor B 2

Compressor B2 shut down

 

Ditto

Crankcase heater fault and open motor current

 

 

 

 

 

fault detection board contact

701

DGT fault, compressor B3

Compressor B3 shut down

 

Ditto

Hot gas thermostat contact open

702

Starter Guard fault compressor B3

Compressor B3 shut down

 

Ditto

Crankcase heater fault and open motor current

 

 

 

 

 

fault detection board contact

801

DGT fault, compressor B4

Compressor B4 shut down

 

Ditto

Hot gas thermostat contact open

802

Starter Guard fault compressor B4

Compressor B4 shut down

 

Ditto

Crankcase heater fault and open motor current

 

 

 

 

 

fault detection board contact

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Contents 30GK Series PRO-DIALOG Control Installation, operation and maintenance instructionsTable of Contents Safety Considerations Diagnostics Troubleshooting Avoiding electrocution Safety ConsiderationsGeneral Abbreviations used General DescriptionControl box Hardware DescriptionGeneral Control board Electronic boardsOrange LED CCN/clock board Board addressesRed LED Green LEDHeat reclaim condenser entering/leaving water temperatures Evaporator entering water temperature sensorEvaporator leaving water temperature sensor Condenser entering and leaving water temperature sensorsRemarks Description Connector Terminal ChannelUser connections Available TerminalsMain Interface Button Name Description Setting UP PRO-DIALOG Plus ControlLocal interface general features Main interfaceStarting unit and selecting an operating type Stopping the unit in local modeUnit start/stop control DescriptionSelecting a menu item Modifying the value of a parameter/access to a sub- menuMenus Selecting a menuStructure MenuStatus Menu treeInformation Menu Format Units Description Description of the Information menuPressures Menu Format Units Comments Description of the Temperatures menuTemperatures Menu Format Units Comments Description of the Pressures menuSetpoints Menu Format Units Range Comments Description of the Setpoints menuInputs Menu Format Units Comments Description of the Inputs menuDescription of the Outputs/Tests menu General Menu descriptionFormat Units Description Manual tests Description of the Configuration menu GeneralPassword SUB-MENU Holiday Configuration SUB-MENU Period ConfigurationUser 1 Configuration SUB-MENU Format Units Default Comments Description of the User 1 Configuration sub-menuDate & Time Configuration SUB-MENU Format Comments Description of the User 2 Configuration sub-menuDescription of Date and Time configuration sub Menu Item # Format Comments Typical timer programDescription of the Holidays sub-menus Description of the Broadcast sub-menuAlarms Menu Item # Format Description Description of the Alarms menuDescription of the Alarms History menu Broadcast Configuration SUB-MENU Item # Format CommentsDescription of the Runtimes 1 menu Maintenance menu descriptionRuntime menu description Description of the Runtimes 2 menu Heating/cooling selection Chilss Contact Type Mode ShutdownPRO-DIALOG Plus Control Operation Start/stop controlControl point Evaporator water pump control Control interlock contactCondenser water pump control Evaporator heater controlDetermining the lead circuit Demand limit by 0-10 V d.c. signalDemand limit Capacity controlHead pressure control on water-cooled units Slave compressor start-up sequenceControlling the EXV Head pressure control on air-cooled unitsControlling Pro-Dialog Plus units with a System Manager Master/slave assemblyHigh pressure load shedding function Pumping downOptional heat reclaim module Diagnostics TroubleshootingDisplaying alarms Resetting alarmsAlarm Code Descriptions Alarm codesCCN Starter Guard Compressor faults 6.4.1.1 GeneralDGT only for units with low-temperature option Compressor protection devices

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