User manual

2920 1207 05
22
User manual
shown (the data reflect the condition of the compressor at
the moment of shut-down):
- Time
- Date
- Duration of longest load or unload period (if these data
are selected)
- Number of running hours
- Number of loading hours
- Number of motor starts
- Outlet pressure
- Compressor element outlet temperature
- Condition of the motor overload function
3. Press the key <<Menu>> to return to the submenu and select
another option, e.g. <<Last shutdown 2>> (i.e. the last shut-
down but one) to consult the last shut-down data but one.
Following screen may appear (Fig. 15.2):
Element outlet
Shd 110
C110 ↓
Menu
F1 F2 F3
Fig. 15.2. Example of a saved data screen
The display (Fig. 15.2) indicates:
- The shut-down (<<Shd>>) was due to too high a compressor
<<element outlet>> temperature
- The shut-down value is programmed at 110 degrees celsius
(<<Shd 110>>)
- The temperature increased to <<110>> degrees celsius
- On the bottom line the key <<Menu>> to return to the
submenu
By using the scroll key ↓ (6-Fig. 2.1), other data related to the
shut-down can be called up.
16 MORE FUNCTION: Quick look at
actual compressor status
16.1 Function
To have a quick look at:
- The control status of the compressor, i.e. automatic or
manual control, local or remote control, start/stop timer on
or off
- The maximum allowable unloading pressure
- The actual outlet pressure
- The actual temperature at the compressor element outlet
- The dewpoint (on Full-feature compressors)
- The status of the motor overload protection
- The running and loading hours
On GA55/90C also:
- The pressure difference over the oil separator
- The status of the fan motor overload protection
- On water-cooled compressors also: the actual cooling
water outlet temperature
16.2 Procedure
1. If necessary, activate the main display. See section 4.2.
2. Press the key <<More>>. A screen similar to Fig. 16.1
appears:
Auto operation
Local control
Timer active
Menu More Unld
F1 F2 F3
Fig. 16.1. Example of a more display
<<Line 1>> indicates the automatic or manual operation
status of the regulator.
<<Auto operation>> means that the regulator automatically
adapts the operation of the compressor, i.e. loading,
unloading, stopping and automatic restarting according to
the programmed parameters.
<<Man operation>> means that the automatic pressure
control function of the regulator is interrupted after manual
intervention through the function keys on the keyboard (see
section 17).
Line 2 indicates whether the regulator operates in local
control or remote control mode.
<<Local control>> means that the start/stop and load/unload
buttons on the keyboard are activated.
<<Remote control>> means that these functions are
controlled remotely. Consult Atlas Copco.
Line 3 indicates whether the timer which generates time-
based start and stop commands is activated or not. See
section 13.
3. Press the key <<More>> again: the next screen shows the
max. pressure, i.e. the max. allowable unloading pressure.
4. Press the key <<More>> to get following information (the
data reflect the actual condition of the compressor):
- The delivery air pressure
- The element outlet temperature
- Dewpoint (only on Full-feature compressors)
- The status of the motor overload function
- The number of running hours
- The number of loading hours
On GA55/90C also
- The pressure difference over the oil separator
- The status of the fan motor overload protection
- On water-cooled compressors also: the actual
cooling water outlet temperature
5. The last item shown is always the loading hours.