INSTRUCTION MANUAL
23
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The “Automatic mains failure” option offers the following fea-
tures:
– continuous monitoring of four input lines.
– an automatic battery charger, “trickle charge”.
– an engine cooling water heating.
– an extended control module.
– a remote start possibility.
Continuous monitoring
The “Automatic mains failure” option continuously monitors four
input lines of the main power supply: the three phases and neutral.
When the mains (one or all phases) is not available for approxi-
mately 0.5 seconds, the following timing applies:
– The mains contactor opens and disconnects the load from the mains.
– The unit starts 3 seconds (crank delay) after the mains failure. If the
unit does not start immediately, it will carry out another 3 starting
attempts, each consisting of 10 seconds cranking and 5 seconds in-
terval (crank time).
– After 10 seconds generator stabilisation time (plant settle time), the
generator contactor is energized and the generator supplies power
towards the load.
When the mains (all phases) is available again for at least 10 sec-
onds (mains restore time), the following timing applies:
– The generator contactor opens and the mains contactor closes (1
second change over time).
– The generator shuts down 1 minute later (delay run on time).
The timing can be adjusted by means of the potentiometers located
at the back of the AMF control module:
S9 ......Crank timer
S10 ....Plant settle timer
S11 ....Mains restore timer
S12 ....Delay run on timer
The table below summarises the relation between the position of
the potentiometers and the value of the timers.
Potentiometer S9 S10
Position Crank delay Crank time Plant settle time
0 3 sec 10 sec 10 sec
1 10 sec 10 sec 15 sec
2 10 sec 15 sec 20 sec
3 15 sec 10 sec 25 sec
4 15 sec 15 sec 30 sec
5 25 sec 10 sec 35 sec
6 25 sec 15 sec 40 sec
7 25 sec 25 sec 45 sec
8 50 sec 15 sec 50 sec
9 50 sec 25 sec 60 sec
Potentiometer S11 S12
Position Mains restore time Delay run on
0 10 sec 1 min
1 20 sec 2 min
2 40 sec 3 min
3 1 min 4 min
4 2 min 5 min
5 3 min 6 min
6 4 min 7.5 min
7 7.5 min 10 min
8 10 min 12.5 min
9 15 min 15 min
The timers are factory set at position O.
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
S10 S11 S12
S9S1-S8
ON
91F08
5H
1 2 3 4 5 6 7 8
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