20
07.03
Part 5
Maintenance
5.2.2
Reports of the
SAB-processor:
5.2.2.1 Alarm indications
A1
Pressure dew point
in critical range
A2
Suction gas tempera-
ture in critical range
A 3
Inlet temperature in
critical range
A 4
Ambient tempera-
ture in critical range
5.2.2.2 Failure indications
H 1
Pressure dew point
too high
H 2
Suction gas tem-
perature too high
H 3
Inlet temperature too
high
H 4
Ambient tempera-
ture too high
L 1
Pressure dew point
too low
L 2
Suction gas tem-
perature too low
L 3
Inlet tempera-
ture too low
L 4
Ambient tempera-
ture too low
5.2.2.3 Failure reports with
stopping the refriger-
ant compressor
FF
Pressure dew point too
low
FH
Refrigerant overpres-
sure
FL
Refrigerant underpres-
sure
FI
Overcurrent
5.2.2.4 Failure acknowledge-
ment
Check load conditions of CA-dryer
Check control (call for service)
Check aftercooler of CA-dryer
Lower machine room temperature
Check load conditions of CA-dryer
Check control (call for service)
Check aftercooler of CA-dryer
Lower machine room temperature
Check control (call for service)
Check control (call for service)
Increase compressed air inlet temperature
Increase machine room temperature
After 45 seconds, the indication always goes back to the
failure appeared first, which was also stored and counted
particularly. If a failure disasppears again, the correspond-
ing indication disappears, too.
Note: At determined operation conditions, the fans can
run on.
Check control (call for service)
Check fans or cooling water control valve (water-cooled
version) resp., clean condenser,
lower machine room temperature
Increase machine room temperature
Lack of refrigerant - check cooling circuit for leakage,
Check control (call for service)
Check current consumption of refrigerant compressor
and replace if necessary (call for service)
FH: operate reset button at pressure limiter
FH, FI: Acknowledgement by switching the operation
switch on and off
