ALUP Kompressoren SCK 21 Maintenance And Operating Instructions Download

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Troubleshooting

reminding information

due to a run out service time or a run out service interval must be confirmed with

Code 21

and reset with the

- key, after proper service.

warning

has occured when the red lamp flashes with the machine still operating. The warning cause is shown in the display screen. After

proper service, reset the warning with the

- key.

trouble

has occured when the red lamp lights up continuously and the machine is at standstill. The trouble cause is shown in the display

screen. After proper maintenance, reset the trouble with the

- key and the machine can be started up again.

Trouble

7.1 Machine switches off through

compressor dis-charge
temperature; display screen
information

15 (red lamp

lights up)

7.2 Falling line pressure

7.3 Machine blows off through

the safety valve (12).

7.4

10, or

(red lamp lights up)

7.5 No automatic start or

switching to load after
previous shutdown when the
set cut-out pressure is
reached or from idling

7.6 Machine does not start when

the start key

is pushed

7.7 High oil content in the

compressed air (excess oil
consumption).

7.8 Compressor switches off

before the set cut-out
pressure is reached
(red lamp lights up).

7.9 Information

3 (red lamp

lights up)

Cause

- Sound absorbing bonnet not closed
- Suction/ambient temperature too high
- Cooling air inlet or outlet blocked
- Oil filter (15) dirty
- Lack of oil
- Oil cooler (14) outside contamination

Attention : all cooler nozzles are to be
counterbacked with a sufficient key;
mind not to overturn the cooler
connections.

- Oil temperature controller (13) defective

- Air consumption exceeds air supply

quantity

- Suction filter (05) dirty
- Relief valve (07) blows off when loading

- Suction valve (06) does not open

- Leakages in the line system

- Upper pressure switch point too high
- Safety valve (12) defective

- means oil separator (08) dirty
- means external high pressure source

- Upper pressure switch point too high
- Interruption in the control circuit

- Ambient temperature below +1°C; the

symbol for temperature flashes

- Line pressure above upper switch point
- Remote control function active
- No power at the compressor
- Electric defect in the control

- Oil return line clogged
- Oil separator (08) defective

- Excess temperature or pressure

- Interruption in the control circuit

- Power voltage below appr. 180 Vac

Measures to be taken

- Close the sound absorbing bonnet
- Vent the compressor compartment
- Clear the cooling air inlet/outlet
- Change the oil filter (15)
- Refill with fresh compressor oil
- Clean with compressed air. At severe

contamination, remove the cooler (09, 14)
unit and clean it with a water jet device

Caution - danger of short circuit!

No water jets on electric components!

- Replace the controller (13) insert

- Compressor with higher discharge quantity

required

- Change the suction filter (05).
- Check the relief valve (07) and replace the

seals, if necessary

- Check the solenoid valve and the suction

valve piston (06) and replace, if necessary

- Check and seal the line system

- Adjust the upper pressure switch point
- Replace the safety valve (12)