Emerson VISSION 20/20 service manual Don’T

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Best Practices

DO:

Keep AC wires away from circuit boards.

Always run conduit into the bottom or sides of an enclosure.

If the conduit must be placed in the top of an enclosure, use a water-tight conduit fit- ting to keep water from entering the enclosure.

The Vission 20/20 is supplied with pre-punched conduit holes. Use them!

DON’T:

Don’t run wires through the Vission 20/20 enclosure that are not related to the com- pressor control.

Don’t add relays, timers, transformers, etc. in the Vission 20/20 enclosure without first checking with Vilter.

Don’t run conduit into the top of an enclosure.

Don’t run refrigerant tubing inside the enclosure.

Don’t drill metal enclosures without taking proper precautions to protect circuit boards from damage.

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Contents Control Panel Page Important Note Page Touch Screen LCD Display Optional Analog Input Jumper Tables Standard Vilter Warranty Page Operational Flow Charts Page Proper Wire Sizing Voltage SourceVoltage Source Grounding Mixing Voltages Wiring Methods DON’T Touch Screen Description Type Liquid Injection #2 Output Not Defined Page Analog Inputs Page Compressor VFD 20 mA Condenser VFD Slide Valve Position Main Screen Touch Screen LCD DisplayMenu Button Indicators LOG on ButtonMenu Screen Page Compressor Control Time Proportioning Control Auto-Cycle Setpoints Other Setpoints That Might be Required for Motor PID Control Pump-down Pull-down Misc. Control Page Page Alarms and Trips Screen Page Alarms and Trips Page Timers Page Timers Service Options Instrument Calibration Slide Calibration Remove Cover Press Down On Photochopper Command Shaft Rotation Capacity Volume INC DEC CCW Slide Valve Operation Slide Valve Trouble Shooting Guide Problem Reason SolutionProblem Replace the actuator. See above Trend Chart Event List Screen Input / Output States Configuration Screens Page Page Maintenance Screen Log In Screen Screen to Add Users User Level Percent Volume Fail Low Control Temperature FailSuction Pressure SP#1 Fail Suction Pressure SP#2 FailAuxiliary Safety#1 Input Fail Low Start Oil Pressure FailLow Oil Pressure Fail Low Oil Injection Temp FailVission 20/20 Troubleshooting Guide Dipswitches Digital & Analog BoardsDipswitch Position Digital Output #2 Digital Input Digital Input/Output #1 Digital Input/Output #2 POSITION-1 JP-16 JP-19 JP-22 JP-27 JP-28 JP-29 JP-30 JP-31 POSITION-2 Jumper Position Analog Output Optional Analog Input Jumper Tables Channel #6 Signal Page EmersonClimate.com