INSTRUCTION MANUAL
25
L9 ......Overspeed shut down
Lights up when the engin’s speed has exceeded 115 % of the
nominal speed. The nominal speed is determined by means of
the dipswitch S8 at the back of the control module.
L10 ....Engine coolant temperature shut down
Lights up when the high engine coolant temperature was the
cause of shut down.
L11 ....Engine oil pressure shut down
Lights up when the low oil pressure was the cause of shut
down.
L12 ....Charge fail indicator
Goes out after starting, indicating that the alternator is charg-
ing. A failing alternator however will not shut the engine down.
ST......Starter switch
P1 : the generator starts immediately. The load will be trans-
ferred if a mains failure occurs.
P2 : the generator will never start.
P3 : the generator will start when the remote start/stop contact
is closed.
P4 : the generator will take over when a mains failure occurs.
P5 : the generator will not start when a mains failure occurs.
Nevertheless, the mains remains monitored and the mains con-
tactor will trip in case of a mains failure.
For correct functioning of the module, the DIP switches at the back
of the module should be positioned as follows:
Remote start possibility
The “Remote start” feature of the “Automatic mains failure” option
allows to switch the unit on or off without using the control panel
located on the unit. For this purpose, the control module provides a
voltage free contact for the connection of the remote start/stop
switch (to be installed by the customer).
The unit will start in case the contact is closed (start/stop switch in
position start) and the starter switch of the control module is in po-
sition (position P3).
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The “Single frequency” option provides an electronic speed con-
troller which makes sure that the output frequency of the generator
is 50/60 Hz with an accuracy of 0.25 % at constant load.
R11....Supply voltage adjust potentiometer
Allows to adjust the output voltage.
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The "Dual frequency with electronic speed control" option allows
the unit to work at 50 Hz or at 60 Hz with an accuracy of 0.25 % at
constant load. The frequency selection is done by means of switch
S11.
R11....Supply voltage adjust potentiometer
Allows to adjust the output voltage.
S11 ....Frequency selector switch (50 Hz / 60 Hz)
Allows to choose the frequency of the output voltage: 50 Hz or
60 Hz.
Besides dipswitch S8, located at the back of the con-
trol module and used for the selection of the nominal
speed (50 Hz or 60 Hz), dipswitch S1 can be used for
enabling or disabling a spare shut down contact.
The contactors between the mains, the unit and the
load are not included in the option but should be
sized according to the load. Nevertheless, they are
also available as sales kit at Atlas Copco. Refer to
circuit diagram 9822 0773 55 of the “Automatic
mains failure” option for the correct connection.
ON
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1 2 3 4 5 6 7 8
Changing the output frequency is only allowed after
shutdown.
After changing the output frequency, adjust the out-
put voltage by means of potentiometer R11 to the
required value.
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