Trouble-Shooting - Gardner Denver L Series Original User And Service Manual

In the case of faults or warnings that are detected by the compressor controller, please refer to the Section
"Fault/warning" in the operating instructions of the compressor controller.
Malfunction
Unit cannot be 1.
started
2.
3.
4.
5.
6.
7.
8.
1.
Unit stops during the
start-up phase
2.
3.
4.
5.
1.
Unit does not reach
the set mains
2.
pressure
3.
4
5
6
Possible cause
No operating or control voltage
Malfunction not acknowledged
Pressure reservoir not depressurized
Electric motor defective
Compressor defective
Ambient temperature less than 34°F
Remote control/timer has been activated
Mains pressure exceeds the lower
switching point (L90-L132) or the
prescribed pressure (L132RS)
Suction regulator only closes part way,
pressure builds up too quickly in the
pressure reservoir
System short
Connection terminal in switch cabinet is
loose
Oil is too viscous
Maximum motor cycles exceeded due to
manually switching off and on too often
System pressure sensor set too low
Suction regulator only opens partially
Air bleed too large
Fine oil separator is dirty
Air filter is dirty
Large leaks in the compressor system
13-25-639 v00
Remedy
1. Check fuses, main switch and supply line
2. Acknowledge fault message
3. Wait until depressurized
4. Check connections, winding, etc.
5. Turn the compressor manually; if
required, replace
6. Make sure that the ambient temperature
is not less than 34°F; install an auxiliary
heater, if required
7. Deactivate remote control/timer
8. Wait until the mains pressure has fallen
below the lower switching point
1. Make the suction regulator viable,
replace if necessary, check the solenoid
valve
2. Determine cause and remedy, replace
defective fuses
3. Check and tighten
4. Choose type of oil which suits the
environmental conditions or install an idle
heater
5. Avoid frequent manual on and off
switching, let the electric motor cool
1. Check, reset
2. Make the suction regulator viable,
replace if necessary, check the solenoid
valve
3. Throttle the bleed or attach additional
compressors
5. Replace the fine oil separator cartridge
6. Replace air filter cartridge
7. Check the unit
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