GEA Grasso - Page 127

Grasso
Refri
g
eration Division
GRASSO SYSTEM CONTROL
01.2003/0 638660E_chapter6.doc Kap.6 - 15
Display message / Explanation Possible cause of the alarm Alarm clearance
The feedback contactor is defective
— open contact.
Replace the feedback contactor.
091 Alarm (01)
Motor feedback
missing during
operation
Power failure due to tripped fuse. Change fuse.
The terminal connections have
become loose or a wire is broken.
Check the terminal connections for
tightness and continuity of wiring.
This alarm is activated if the
compressor is running and the digital
input signal E 0.0 ’Compressor
feedback’ equals 0.
The digital input module defective. Replace the digital input module.
092 Alarm (01)
Liquid in compressor
Discharge temperature
(LP) too low
This alarm is activated if the
discharge temperature at the low
pressure side (equals intermediate
temperature LP) falls below a fixed
limit value
.
The intermediate temperature at
the low pressure side is too low.
Remove cause of low intermediate
temperature LP in the refrigeration
plant.
093 Alarm (01)
Compressor heating
Discharge temperature
(LP) too high
This alarm is activated if the
discharge temperature at the low
pressure side (equals intermediate
temperature LP) exceeds a fixed limit
value
.
The intermediate temperature at
the low pressure side is too high.
Remove cause of high intermediate
temperature LP in the refrigeration
plant.
094 Alarm (01)
Liquid in compressor
Discharge temperature
(HP) too low
This alarm is activated if the
discharge temperature at the high
pressure side falls below a fixed limit
value
.
The discharge temperature at the
high pressure side is too low.
Remove cause of low discharge
temperature in the refrigeration plant.
095 Alarm (01)
Compressor heating
Discharge temperature
(HP) too high
This alarm is activated if the
discharge temperature at the high
pressure side exceeds a fixed limit
value
.
The discharge temperature at the
high pressure side is too high.
Remove cause of high discharge
temperature in the refrigeration plant.