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83001602.Kf
Error
code
Display view
Type of message
Message description
Cause of the message
Troubleshooting
Reaction of the chiller
161
LP STOP
Group fault alarm
Analog input low
pressure (PWM) on µPC,
has maximum
measurement value,
although a lower value
should be displayed
Analog input not connected or
defective.
Check liquid flow. Check the
function of the expansion valve.
Check the refrigerant level.
After starting the compressor, the low
pressure is bridged. Then all
compressors switch off. When the
pressure increases, the compressors
switch on again.
During operation, all compressors
switch off with a time delay. They
switch on again when the pressure
increases. The compressors restart up
to 3 times, after which alarm AL162 is
triggered.
All other components continue to run.
Alarm is saved.
Manual reset.
162
LP STOP 3x
Group fault alarm
The minimum
permissible pressure on
the suction side of the
compressor (low
pressure side) was 3
times lower.
S.h. LP STOP
S.h. LP STOP
Compressor no longer starts
automatically after the 3rd low
pressure STOP AL161,
All other components continue to run.
Alarm is saved.
Manual reset.
163
ND STOP 3x
Group fault alarm
After closing the EEV,
the low pressure does
not drop below the set
value.
EEV does not close,
MV hot gas bypass leaks,
refrigeration circuit leaks.
Check EEV,
Check MV hot gas bypass,
Check refrigeration circuit for
leaks.
Compressor switches off after set time.
After the warning, the compressor is
blocked.
Manual reset.
171
Superheating
Group fault alarm
message
from Version 2.70
then warning WA131
The superheat limit has
been exceeded or
undercut. vBoxX Min;
cBoxX Min and Max.
Superheat too low or too high
0
only display if alarm occurred 3 times,
alarm is saved,
2x automatic reset,
then manual reset.
301
Outlettemp. 1 max
warning
Group warning
The outlet temperature
of the chiller circuit is
approaching the upper
design limit.
Thermal overload,
No refrigeration.
Check refrigerating capacity,
check the function of the
refrigeration circuit
All components continue to run,
Warning is saved,
Manual reset.
