GEA Grasso, Manual

Page: 130 / 166

Grasso
Refrigeration Division
GRASSO SYSTEM CONTROL
Kap.6 - 18 638660E_chapter6.doc 01.2003/0
Warning message Possible cause Warning clearance
The intermediate gas overheat is
too low. Remove the cause of low
intermediate gas overheat in the
refrigeration plant.
100 Warning (01)
Low intermediate
gas overheat
’Intm dif temp’ plus ’Low warning’
set too high. Change ’Intm dif temp’ and ’Low
warning’ limits to suitable values.
’dTm alarm dly’ time is set too
short. Change ’dTm alarm dly’ time to a
suitable value. 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.
The configuration is incorrect. Check the parameter ‘Refrigerant’
and ‘Comp type’ in the
configuration menu.
The oil temperature is too low. Remove the cause for low oil
temperature in the refrigerating
plant.
101 Warning (01)
Low oil
temperature
‘Toil low alarm‘ plus ‘Low warning‘
set too high. Change ‘Toil low alarm’ and ‘Low
warning’ limits to suitable values.
The sensor has not been correctly
calibrated in the configuration
menu. Enter the correct calibration value. This warning is activated if the oil
temperature is less than the ‘Toil low
alarm’ plus ‘Low warning’ limit
values.
The sensor is defective. Replace the sensor.
The oil temperature is too high. Remove the cause for high oil
temperature in the refrigerating
plant.
102 Warning (01)
High oil
temperature
‘Toil hi alarm‘ minus ‘High warning‘
set too high. Change ‘Toil hi alarm’ and ‘High
warning’ limits to suitable values.
The sensor has not been correctly
calibrated in the configuration
menu. Enter the correct calibration value. This warning is activated if the oil
temperature is higher than the ‘Toil
hi alarm’ minus ‘High warning’ limit
values.
The sensor is defective. Replace the sensor.
The motor current is too high. Remove the cause for high motor
current in the refrigerating plant.
103 Warning (01)
High motor
current
‘Imot hi alarm‘ minus ‘High
warning‘ set too high. Change ‘Imot hi alarm’ and ‘High
warning’ limits to suitable values.
The sensor has not been correctly
calibrated in the configuration
menu. Enter the correct calibration value. This warning is activated if the
motor current is higher than the
‘Imot hi alarm’ minus ‘High warning’
limit values.
The sensor is defective. Replace the sensor.
The motor speed is too low. Remove the cause for low motor
speed in the refrigerating plant.
104 Warning (01)
Low motor speed
‘Nmot low alarm‘ plus ‘Low
warning‘ set too high. Change ‘Nmot low alarm’ and ‘Low
warning’ limits to suitable values.
The sensor has not been correctly
calibrated in the configuration
menu. Enter the correct calibration value. This warning is activated if the
motor speed is less than the ‘Nmot
low alarm’ plus ‘Low warning’ limit
values.
The sensor is defective. Replace the sensor.