GEA Grasso, Manual

Page: 125 / 166

Grasso
Refrigeration Division
GRASSO SYSTEM CONTROL
01.2003/0 638660E_chapter6.doc Kap.6 - 13
Display message / Explanation Possible cause of the alarm Alarm clearance
The terminal connections have
become loose or a wire is broken. Check the terminal connections for
tightness and continuity of wiring.
075 Alarm (01)
Wire failure
intermediate
temperature LP
There is a short circuit in the sensor
wiring. Check where the short circuit has
occured and rectify.
The sensor is defective. Replace the sensor. The GSC has detected a loose wire
or short circuit in the intermediate
temperature LP sensor.
The analogue input module
defective. Replace the analogue input module.
The terminal connections have
become loose or a wire is broken. Check the terminal connections for
tightness and continuity of wiring.
076 Alarm (01)
Wire failure
intermediate
temperature HP
There is a short circuit in the sensor
wiring. Check where the short circuit has
occured and rectify.
The sensor is defective. Replace the sensor. The GSC has detected a loose wire
or short circuit in the intermediate
temperature HP sensor.
The analogue input module
defective. Replace the analogue input module.
The intermediate gas overheat is
too low. Remove cause of low intermediate gas
overheat in the refrigeration plant.
077 Alarm (01)
Intermediate gas
overheat too low
‘Intm dif temp’ limit is set too high. Change ‘Intm dif temp’ limit to a
suitable value.
‘dTm alarm dly’ time is set too
short. Change ‘dTm alarm dly’ time to a
suitable value. This alarm is activated if the
intermediate gas overheat falls
below the ’Intm dif temp’ limit value
and the time delay ’dTo alarm dly’
has expired.
The configuration is incorrect. Check the parameter ‘Refrigerant’,
‘Comp type’ and ‘ECO system’ in the
configuration menu.
The oil temperature is too low. Remove cause of low oil temperature
in the refrigeration plant.
078 Alarm (01)
Oil temperature
too low
‘Toil low alarm’ limit is set too high. Change ‘Toil low alarm’ limit to a
suitable value.
The sensor has not been correctly
calibrated in the configuration
menu. Enter the correct calibration value. This alarm is activated if the oil
temperature falls below the ’Toil low
alarm’ limit value.
The sensor is defective. Replace the sensor.
The oil temperature is too high. Remove cause of high oil temperature
in the refrigeration plant.
079 Alarm (01)
Oil temperature
too high
‘Toil hi alarm’ limit is set too low. Change ‘Toil hi alarm’ limit to a
suitable value.
The sensor has not been correctly
calibrated in the configuration
menu. Enter the correct calibration value. This alarm is activated if the oil
temperature exceeds the ’Toil hi
alarm’ limit value.
The sensor is defective. Replace the sensor.