High Level Shutdown; Starter; False Start - Emerson VILTER MicroVission Operation And Service Manual

Section 6 • Alarms and Trips
Warnings
Not Running (Idle)

High Level Shutdown:

Below messages will be displayed when power is removed from the input module.
High Level Shutdown switch is wired to the digital input normally closed. Usually connected to a float switch on a
vessel containing liquid refrigerant. In case of multiple switches, any open switch will generate a relevant message
depending on compressor operating mode.
When "Idle Time Trip" checkbox is enabled in Configuration screen, High Level Shutdown Trip will be monitored
even when compressor is idle.
High Level Shutdown
Warning
High Level Shutdown
Digital Input is Active
Low

Starter:

Below message will be displayed on Main Screen when Motor Auxiliary Contact Fails to Open after Compressor
shutdown.

False Start:

Below message will be displayed on Main screen in following cases when Compressor is Idle.
1) Motor Auxiliary Contact is Closed.
2) Measured Motor Current Value is greater than Maximum Load Rating in Amperes.
6 – 10
Inhibits
Pre-Start
High Level Shutdown Inhibit
High Level Shutdown Digital
Input is Active Low during
Compressor Start
MicroVission Controller • Operation and Service Manual • Emerson • 35391MV 1.3
Alarms
Running
High Level Shutdown
High Level Shutdown
Digital Input is Active
Low while Compressor is
Starter Shutdown Trip
Motor Auxiliary
Contact is Closed after
Compressor is Stopped
Motor Auxiliary Contact
Motor Amperage > 20 %
Maximum Amps
Trips
Running
Trip
Running
False Start
is Closed
OR