User manual

Industrial Air Division
2920 1163 04
18
3. The display (4) will show a service message if one of the
monitored components is to be serviced; replace the
component and reset the relevant timer.
Notes:
- Whenever a shut-down, shut-down warning, service
request, sensor error or motor overload message is
displayed, the free spaces on the display between the
function keys (5) are filled with blinking indicators (**).
- When more than one message needs to be displayed (e.g.
both warning and service), the messages will be displayed
one after the other for 3 seconds.
4. Regularly press the key More (5) 1) to call up information about
the actual compressor condition:
- the status of controlling the compressor (automatic or
manual, local or remote)
- the status of the compressor start/stop timer (on or off) 2)
- the maximum allowable unloading pressure
- the outlet pressure
- the compressor element outlet temperature
- the dewpoint temperature (on Full-feature compressors)
- the status of the motor overload protection (normal or not)
- the total running and loading hours
2.5 Manual control (Fig. 7a) 3)
Normally, the compressor runs in automatic operation, i.e. the
electronic regulator loads, unloads, stops and restarts the
compressor automatically. LED (1) is then alight.
If required, the compressor can be unloaded manually. In this
case, the compressor is switched out of automatic operation, i.e.
the compressor remains running unloaded unless it is loaded again
manually.
Manually unloading
Press the key Unld (unload) (5). LED (1) goes out. The message
Manual Unloaded appears on the display.
Manually loading
Press the key Load (5). LED (1) lights up. The command Load
does not force the compressor in loaded condition, but it will switch
the compressor to automatic operation again, i.e. the compressor
will be loaded if required by the air net pressure.
Manually starting
In automatic operation, the regulator limits the number of motor
starts. If the compressor is stopped manually, it must not be
restarted within 6 minutes after the last stop.
1) If the More function is not indicated on the bottom line of
display (4-Fig. 7a), press key Menu (5) until function Main
appears above key (F1), then press the key Main.
2) The compressor is automatically started and stopped if these
start/stop commands are programmed and activated; consult
the User manual for the electronic regulator, section "Timer
submenu".
3) If the Load or Unld (unload) function is not indicated on the
bottom line of display (4), press key Menu (5) until the function
Main appears above key (F1), then press the key Main.
2.6 Stopping (Fig. 7a)
1. Press stop button O (9). LED (1) goes out. The message
Programmed stop appears. The compressor runs unloaded
for 30 seconds and then stops.
2. To stop the compressor in case of emergency, press button
(S3). Alarm LED (3) blinks. After remedying the fault, unlock
the button by turning it anticlockwise and press key Rset (5)
before restarting. The message All conditions are OK
appears. Press keys Menu and Main.
3. Close air outlet valve (AV-Figs. 4) and switch off the voltage.
4. Open condensate drain valve (Dm-Fig. 3).
On water-cooled compressors only:
5. Close the cooling water inlet valve.
6. If freezing temperatures can be expected, drain the cooling
system completely.
2.7 Taking out of operation at end of compressor
life cycle
1. Stop the compressor and close the air outlet valve.
2. Switch off the voltage and disconnect the compressor from the
mains.
3. Depressurize the compressor by opening plug (FC-Fig. 12) and
valve (Dm-Fig. 3).
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. Shut off the compressor water piping and isolate it from the
cooling water net.
6. Drain the oil, water and condensate circuits.
7. Disconnect the compressor condensate piping from the
condensate drain system.