GEA Grasso Manual page 130

Grasso
Refrigeration Division
Warning message
100 Warning (01)
Low intermediate
gas overheat
This warning is activated if the
intermediate gas overheat is less
than 'Intm dif temp' plus 'Low
warning' limit values and the ½ time
delay 'dTm alarm dly' has expired.
101 Warning (01)
Low oil
temperature
This warning is activated if the oil
temperature is less than the 'Toil low
alarm' plus 'Low warning' limit
values.
102 Warning (01)
High oil
temperature
This warning is activated if the oil
temperature is higher than the 'Toil
hi alarm' minus 'High warning' limit
values.
103 Warning (01)
High motor
current
This warning is activated if the
motor current is higher than the
'Imot hi alarm' minus 'High warning'
limit values.
104 Warning (01)
Low motor speed
This warning is activated if the
motor speed is less than the 'Nmot
low alarm' plus 'Low warning' limit
values.
Kap.6 - 18
Possible cause
The intermediate gas overheat is
too low.
'Intm dif temp' plus 'Low warning'
set too high.
'dTm alarm dly' time is set too
short.
The configuration is incorrect.
The oil temperature is too low.
'Toil low alarm' plus 'Low warning'
set too high.
The sensor has not been correctly
calibrated in the configuration
menu.
The sensor is defective.
The oil temperature is too high.
'Toil hi alarm' minus 'High warning'
set too high.
The sensor has not been correctly
calibrated in the configuration
menu.
The sensor is defective.
The motor current is too high.
'Imot hi alarm' minus 'High
warning' set too high.
The sensor has not been correctly
calibrated in the configuration
menu.
The sensor is defective.
The motor speed is too low.
'Nmot low alarm' plus 'Low
warning' set too high.
The sensor has not been correctly
calibrated in the configuration
menu.
The sensor is defective.
638660E_chapter6.doc
GRASSO SYSTEM CONTROL
Warning clearance
Remove the cause of low
intermediate gas overheat in the
refrigeration plant.
Change 'Intm dif temp' and 'Low
warning' limits to suitable values.
Change 'dTm alarm dly' time to a
suitable value.
Check the parameter 'Refrigerant'
and 'Comp type' in the
configuration menu.
Remove the cause for low oil
temperature in the refrigerating
plant.
Change 'Toil low alarm' and 'Low
warning' limits to suitable values.
Enter the correct calibration value.
Replace the sensor.
Remove the cause for high oil
temperature in the refrigerating
plant.
Change 'Toil hi alarm' and 'High
warning' limits to suitable values.
Enter the correct calibration value.
Replace the sensor.
Remove the cause for high motor
current in the refrigerating plant.
Change 'Imot hi alarm' and 'High
warning' limits to suitable values.
Enter the correct calibration value.
Replace the sensor.
Remove the cause for low motor
speed in the refrigerating plant.
Change 'Nmot low alarm' and 'Low
warning' limits to suitable values.
Enter the correct calibration value.
Replace the sensor.
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