GEA Grasso - Page 18

Grasso
Refri
g
eration Division
GRASSO SYSTEM CONTROL
Chap. 1 - 6 638660E_chapter1.doc 01.2004/1
1.2.3 Call up table of contents
To get to the table of contents, press the key. A list of the available menus is then displayed.
Number Title
Help text
05 Actual values Display of all unit’s actual values
10 Control settings Display and set up of all control parameters
15 Operating modes Selection of operation mode
20 Limit values Set up of alarm, warning and limitation parameters
25 Alarms Display of current and previous alarms
30 Timer settings Set up of timers
35 Unit Options Selection of unit option menus
50 Configuration Enter: - Refrigerant used
- Compressor type - With/without economiser
- Scaling of the sensors - Number of cylinders
90 Main system menu
To get to these menus, position the cursor on the menu name (using the or key) and confirm with
the
key.
) Parameter changes in menu 20, 30, 35, 50 can cause serious damage to the piston compressor unit!
1.2.3.1 Actual values menu
05 Actual values
PV  SP 
Cap  Imot 
Tc  dPoil 
Actual values 01 >>
PV: Process Variable, display in °C/R (pressure) or °C (temp)
SP: Set Point display in °C / °C/R
Cap: Actual capacity step (for the low pressure stage) in %
Imot: Motor current in A
Tc: Discharge pressure in °C/R
dPoil: Differential oil pressure in bar
Capacity ()  Capacity: Actual capacity step for the high and low pressure stage
Suction press 
Discharge press 
in %
Suction press: Suction pressure in bar (a)
<< Actual values 01 >> Discharge press: Discharge pressure in bar (a)
Oil diff press 
Oil press 
Crankc press 
Oil diff press: Oil differential pressure in bar, calculated from the oil
pressure minus crankcase or suction pressure
Oil press: Oil pressure in bar (a)
<< Actual values 01 >> Crankc press: Crankcase pressure in bar (a)