GEA Grasso Manual page 151

Grasso
Refrigeration Division
•
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
„Freeze display"
Select menu with
Service menu
Select menu with
Operating mode Select operating mode with
„Service"
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
Freeze Displ. 01
Run time :
Capacity NP
Capacity HP
<< Freeze Displ. 01
Set point
Process value
Motor current
<< Freeze Displ. 01
01.2003/0
+
+
via menu „Operating Mode"
: . . :
: : :
Compressor status:
>>
The date and time correspond with the date and time in the alarm
histogram in the menu "Alarm messages"
menu „Alarm messages" the original alarm text can be displayed by
pressing the
: Run time:
Capacity NP:
Capacity HP:
>>
Set point:
Process value:
Motor current:
>>
638660E_chapter8.doc
GRASSO SYSTEM CONTROL
Explanation
Freeze display with all operating
parameters just before appearance of
the last alarm that results in the unit to
shutdown.
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 where the compressor
and or
motor has been blocked and the digital
outputs can be set manually.
Date of the alarm
Time of the alarm
Compressor status just before the alarm occurred
key.
Run time from start till alarm in h:mm:ss
Compressor capacity at low pressure side in %
Compressor capacity at high pressure side in %
Set point in °C
Process value in °C
Motor current in A
. Furthermore, in the
Kap.8 - 3