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Instruction book
1 Hot gas by-pass valve
2 Cubicle
3 Accumulator
4 Refrigerant compressor
5 Condenser
6 Condenser fan
7 Fan control switch
Fig. 3.5 Air dryer
3. The display (12) will show a service message if a service
plan interval has been exceeded or if a service level for a
monitored component has been exceeded. Carry out the
service actions of the indicated plans or replace the
component and reset the relevant timer.
Warning Before carrying out any maintenance, repair or
adjustment, stop the compressor, press the
emergency stop button (S3-Fig. 1.1), close the
air outlet valve and open valves (1 and 4-Fig.
1.5). Wait until the compressor is depressurized.
Switch off the voltage.
Notes:
- Whenever a shut-down, shut-down warning, service
request, sensor error or fan motor overload message is
displayed, the free spaces on the display between the
function keys (3) are filled with blinking indicators (**).
- When more than one message needs to be displayed (e.g.
both warning and service), the messages are continuously
displayed for 3 seconds each.
4. Regularly press the ¯ key (1-Fig. 1.7) on the main screen
to call up information about the actual compressor
condition:
- the maximum pressure
- the status of controlling the compressor (local or
remote)
- the status of the compressor start/stop timer (on or off)
3)
- the actual speed
- the loaded hours
- the motor starts
- the module hours
- the accumulated m³
- the outlet pressure
- the pressure difference over the oil separator
- the compressor element outlet temperature
- the dewpoint temperature 4)
- the status of the fan motor overload protection (normal
or not)
3.5 Stopping (Fig. 1.7)
1. Press stop button O (10). LED (9) goes out. The
compressor stops and the message Programmed stop
appears on the screen. Five seconds later, the message
changes from Programmed stop to Compressor stopped.
2. To stop the compressor in case of emergency, press the
emergency stop button (S3-Fig. 1.1).
3. Close the air outlet valve and switch off the voltage.
4. Open condensate drain valves (1 and 4-Fig. 1.5).
3.6 Taking out of operation
At the end of the life cycle of the compressor, proceed as
follows:
1. Stop the compressor and close the air outlet valve.
2. Switch off the voltage and disconnect the compressor
from the mains.
3. Wait until the compressor has depressurized. Unscrew
plug (3-Fig. 3.1) only one turn to permit any pressure in
the system to escape. Open drain valves (1 and 4-Fig.
1.5).
4. Shut off and depressurize the part of the air net which is
connected to the outlet valve. Disconnect the
compressor air outlet pipe from the air net.
5. Drain the oil and condensate circuits.
6. Disconnect the compressor condensate piping from the
condensate drain net.
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