Service manual

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Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 2.0

Pulldown Control ................................................................................................................................... 6-8

Control Mode......................................................................................................................................... 6-11

Stop load & Force unload .......................................................................................................................6-11

Capacity Slide Triggered Outputs ...........................................................................................................6-12

Volume Slide Position Offset ..................................................................................................................6-13

Soft Load ...............................................................................................................................................6-13

Load Anticipating ...................................................................................................................................6-13

Oil Control .............................................................................................................................................6-13

Liquid Injection ......................................................................................................................................6-13

Section 7 • Alarms and Trips

Overview ...............................................................................................................................................7-1

Alarms and Trips Setpoints .....................................................................................................................7-1

Compressor Inhibits ...............................................................................................................................7-5

Safety Failure Messages .........................................................................................................................7-5

Compressor Warnings............................................................................................................................7-6

Section 8 • Timers

Overview ...............................................................................................................................................8-1

Timer Setpoints .....................................................................................................................................8-1

Section 9 • Compressor Scheduling

Overview ...............................................................................................................................................9-1

Scheduling Setpoint ...............................................................................................................................9-1

Section 10 • Compressor Sequencing

Overview ...............................................................................................................................................10-1

Pressure / Temperature Control Setpoints ..............................................................................................10-1

Capacity Load/Unload Timers ................................................................................................................10-2

Compressor Sequencing Table ...............................................................................................................10-3

Configuration Overview .........................................................................................................................10-5

Compressor Setup for Slave Compressor Sequencing .................................................................10-5

Compressor Setup for Master Compressor Sequencing ..............................................................10-7

Section 11 • Condenser Control

Overview ...............................................................................................................................................11-1

Condenser Control Setpoint ...................................................................................................................11-1

Step Control ...........................................................................................................................................11-2

VFD Settings ..........................................................................................................................................11-3

Section 12 • Service Options

Overview ...............................................................................................................................................12-1

Digital Outputs ......................................................................................................................................12-1

Analog Outputs .....................................................................................................................................12-5

Section 13 • Instruments Calibration

Overview ...............................................................................................................................................13-1

Pressure and Temperature Inputs ...........................................................................................................13-1

Motor Current ........................................................................................................................................13-2

Remote Capacity ................................................................................................................................... 13-4

Analog Inputs ........................................................................................................................................13-4

Analog Outputs .....................................................................................................................................13-5

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