Emerson VISSION 20/20 service manual Alarms and Trips

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Alarms and Trips

Low Suction Temperature = This is the low suction temperature safety. The alarm or trip will be active if the suction temperature should drop to a value that is at or below the set-point value.

High Discharge Temperature : This is the high discharge temperature safety. The alarm or trip will be active if the discharge temperature should rise to a value that is at or above the set-point value.

Low Oil Separator Start Temperature = This is the starting low oil separator temperature safety. The compres- sor is prevented from starting or running if the oil in the separator is below the trip value. After a time delay (setting of the Oil Separator Temperature Safety Changeover timer), this safety is deactivated and the Low Oil Separator Run Temperature alarm and safety set-points become active.

Low Oil Separator Run Temperature = This is the running low oil separator temperature safety. After a time delay, (setting of the Oil Separator Temperature Safety Changeover timer), the Low Oil Separator Start Tempera- ture is bypassed and Low Oil Separator Run Temperature alarm and safety set-points become active. The alarm or trip will be active if the oil temperature in the separator drops to a value that is at or below the set-point value.

Low Oil Injection Temperature = This is the low oil injection safety. The alarm and trip set-points are bypassed at start for a time period (setting of the Oil Injection Temperature Safety Changeover timer). The alarm and trip will be active after the time delay has expired.

High Oil Injection Temperature = This is the high oil injection temperature safety. The alarm or trip will be active on a rise in oil injection temperature at a value at or above the set-point value.

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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 Voltage Source Proper Wire SizingVoltage 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 Touch Screen LCD Display Main ScreenMenu Button LOG on Button IndicatorsMenu 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 Problem Reason Solution Slide Valve Trouble Shooting GuideProblem 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 Suction Pressure SP#2 Fail Percent Volume FailLow Control Temperature Fail Suction Pressure SP#1 FailLow Oil Injection Temp Fail Auxiliary Safety#1 Input FailLow Start Oil Pressure Fail Low Oil Pressure FailVission 20/20 Troubleshooting Guide Digital & Analog Boards DipswitchesDipswitch 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