Emerson Vilter Vission 20/20 Operation And Service Manual page 91

Section 7 • Alarms and Trips
Warnings
Not Running (Idle)
SOI [Suction Oil Injection] Oil Pressure
SOI Oil pressure (Oil Manifold Pressure - Suction Pressure)
Available when SOI Solenoid is enabled in the configuration screen.
These safeties are active after the SOI Low Oil Pressure Bypass timer has expired. This time limit is set on the
Timer menu screen.
SOI Low Oil Pressure (SOI Oil Pressure)
This is the running oil pressure safety.
See Figure 7-7.
SOI Low Pressure Ratio (SOI Pressure Ratio)
This is the low run pressure ratio safety. Depends on Suction and Discharge Pressure value. This Safety is active
if Suction Oil Injection Solenoid is enabled in configuration screen.
See Figure 7-7.
Starter
Low Suction Pressure (Suction Pressure)
This message will appear when Suction Pressure falls below the safety setting of Low Suction Pressure Alarm
(or Trip) Setpoint #1 or #2.
This safety is active in both temperature and pressure control modes.
See Figure 7-2.
Low Suction Pressure
Warning
Suction Pressure < Low
Suction Pressure Alarm
Setpoint No. 1 or No. 2
Low Suction Superheat (Suction Superheat Temperature)
This is the lowest suction superheat temperature safety. This safety is active when suction superheat monitor is
enabled in the configuration screen.
See Figure 7-5.
Vission 20/20 • Operation and Service Manual • Emerson • 35391SC 2.7
Inhibits
Pre-Start
Low Suction Pressure
Inhibit
Suction Pressure < Low
Suction Pressure Alarm
Setpoint No. 1 or No. 2
Alarms
Running
SOI Low Oil Pressure Alarm SOI Low Oil Pressure Trip
SOI Oil Pressure < Low SOI
Oil Pressure Alarm
SOI Low Pressure Ratio
Alarm
Pressure Ratio < SOI Low
Pressure Ratio Alarm
Low Suction Pressure
Alarm
Suction Pressure < Low
Suction Pressure Alarm
Setpoint No. 1 or No. 2
Low Suction Superheat
Alarm
Suction Superheat
Temperature < Low
Suction Superheat
Temperature Alarm
Trips
Running
SOI Oil Pressure < Low SOI
Oil Pressure Trip
SOI Low Pressure Ratio Trip
Pressure Ratio < SOI Low
Pressure Ratio Trip
Starter Shutdown Trip
Starter Problem
Low Suction Pressure Trip
Suction Pressure < Low
Suction Pressure Trip
Setpoint No. 1 or No. 2
Low Suction Superheat
Trip
Suction Superheat
Temperature < Low
Suction Superheat
Temperature Alarm
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