GEA Grasso, Manual

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Grasso
Refrigeration Division
GRASSO SYSTEM CONTROL
01.2003/0 638660E_chapter8.doc Kap.8 - 3
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List of parameters (see chapter 9)
8.2 Special operation for Service personal
To enable service personal to solve problems quickly, the GSC is equipped with extra functionality like:
Service function Operation Explanation
„Freeze display“
Select menu with +
Freeze display with all operating
parameters just before appearance of
the last alarm that results in the unit to
shutdown.
Service menu
Select menu with +
Indication of all digital in- and outputs,
indication of actual, minimum and
maximum capacity step value and
indication of
ϕ
-value for two-stage
compressor.
Operating mode
„Service“ Select operating mode with and or
via menu „Operating Mode“
Operating mode where the compressor
motor has been blocked and the digital
outputs can be set manually.
8.2.1 Freeze display
The Freeze display shows all operating parameters, like pressures and temperatures, just before appearance of
the last alarm that results in the unit to shutdown.
. . : :
Compressor status
. . : Date of the alarm
: : : Time of the alarm
Compressor status: Compressor status just before the alarm occurred
Freeze Displ. 01 >>
)
The date and time correspond with the date and time in the alarm
histogram in the menu “Alarm messages” . Furthermore, in the
menu „Alarm messages“ the original alarm text can be displayed by
pressing the key.
Run time : :
Capacity NP
Capacity HP
Run time: Run time from start till alarm in h:mm:ss
Capacity NP: Compressor capacity at low pressure side in %
Capacity HP: Compressor capacity at high pressure side in %
<< Freeze Displ. 01 >>
Set point
Process value
Motor current Set point: Set point in °C
Process value: Process value in °C
Motor current: Motor current in A
<< Freeze Displ. 01 >>