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11 Troubleshooting
53
Fault
Possible Cause
Remedy
Unit switches off
1.
Ambient temperature is too high
1.
Ventilate the compressor room
2.
Electric motor is defective
2.
Check the electric motor and PTC
thermistor
3.
Faulty fan
3.
Check/exchange fan
4.
Faulty sensor, connection or cable
4.
Check the sensor, connection and
cable
5.
Electrical cable gauge too small
5.
Measure the current draw and
exchange the cable if necessary
6.
Excessive power consumption
6.
Fine oil separator is dirty, replace if
necessary
7.
Oil level too low
7.
Refill the oil in the pressure reservoir
8.
Oil injection pressure too low
8.
Replace the oil filter cartridge, clean
the oil system
9.
Oil temperature too high
9.
Check the oil cooler and fan/ check
the oil temperature controller
Idle pressure too high
1.
Suction regulator doesn
ʼ
t close
correctly
1.
Check the suction regulator and
solenoid valve
2.
System doesn
ʼ
t discharge
2.
Check the suction regulator and
solenoid valve
Oil in the compressed air
1.
Fine oil separator is defective
1.
Replace the fine oil separator
cartridge
2.
Oil foams
2.
Replace the oil
3.
Oil level is too high
3.
Drain the oil
4.
Faulty minimum pressure non-return
valve
4.
Check the minimum pressure non-
return valve
5.
Oil extractor orifice is plugged
(- 12 - Fig. 3)
5.
Remove and clean the orifice
Oil in the air filter
1.
Faulty suction regulator non-return
function
1.
Check the suction regulator
2.
Suction regulator doesn
ʼ
t close
correctly
2.
Check the suction regulator
3.
Regular use of the emergency stop
3.
Emergency stop may only be used for
functional problems relating to safety
Pressure relief valve is
open
1.
Faulty pressure relief valve
1.
Replace
2.
Fine oil separator is dirty and faulty
final compression pressure sensor
2.
Replace the fine oil separator
cartridge and final compression
pressure sensor
3.
Suction regulator closes too slowly
3.
Check the suction regulator and
solenoid valve
4.
Faulty system pressure sensor
4.
Replace the system pressure sensor
5.
Faulty electronics
5.
Replace electronics
DANGER
Never operate the screw compressor with defective pressure relief valve!
Summary of Contents for L23
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Page 61: ...12 Appendix 59 Fig 33 All dimensions in inches ...
Page 62: ...12 Appendix 60 Fig 34 All dimensions in inches ...
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