Gardner Denver L Series Original User And Service Manual page 56

Malfunction
1.
Unit switches off
2.
3.
4.
5.
6.
7.
8.
9.
Idle pressure too high 1.
2.
Oil in the compressed 1.
air
2.
3.
4.
5.
Oil in the air filter 1.
2.
3.
1.
Pressure relief valve
opens
2.
3.
4.
5.
Possible cause
Ambient temperature is too high
Electric motor is defective
Faulty fan
Faulty sensor, connection or cable
Electrical cable gauge too small
Excessive power consumption
Oil level too low
Oil injection pressure too low
Oil temperature too high
Suction regulator doesn't close correctly
System doesn't discharge
Fine oil separator is defective
Oil foams
Oil level is too high
Faulty minimum pressure non-return
valve
Oil extractor orifice is plugged
Faulty suction regulator non-return
function
Suction regulator doesn't close correctly
Regular use of the emergency stop
Faulty pressure relief valve
Fine oil separator is dirty and faulty final
compression pressure sensor
Suction regulator closes too slowly
Faulty system pressure sensor
Faulty electronics
13-25-639 v00
Remedy
1. Ventilate the compressor room
2.
Check the electric motor and PTC
thermistor
3. Check/exchange fan
4.
Check the sensor, connection and
cable
5.
Measure the current draw and
exchange the cable if necessary
6.
Fine oil separator is dirty, replace if
necessary
7. Refill the oil in the pressure reservoir
8.
Replace the oil filter cartridge, clean
the oil system
9.
Check the oil cooler and fan/ check
the oil temperature controller
Check cooling water circuit
(only for water-cooled units)
1. Check the suction regulator and
solenoid valve
2.
Check the suction regulator and
solenoid valve
1. Replace the fine oil separator
cartridge
2. Replace the oil
3. Drain the oil
4. Check the minimum pressure non-
return valve
5. Remove and clean the orifice
1. Check the suction regulator
2. Check the suction regulator
3. Emergency stop may only be used for
functional problems relating to safety
1. Replace
2. Replace the fine oil separator
cartridge and final compression
pressure sensor
3.
Check the suction regulator and
solenoid valve
4. Replace the system pressure sensor
5. Replace electronics
Page 55