9
3.2 Dry-running protection
The purpose of the dry-running protection is to pro-
tect the pump in case of insufficient water flow.
The dry-running protection makes the conventional
dry-running protection unnecessary.
No additional cables to the motor are required.
The dry-running protection will be active after
30 seconds’ operation.
The dry-running alarm is activated when the load has
been below the minimum power limit for an accumu-
lated time of 5 seconds.
The motor is stopped and the dry-running indicator
light is permanently on, see fig. 13, pos. A.
Fig. 13
Restarting:
After 5 minutes (factory setting), or the period set by
means of the R100 display 5.3.4 Automatic restart,
the motor will restart automatically.
TM01 8329 4701
Possible cause Remedy
The pump performance
is too high compared to
the borehole yield.
Replace the pump with
a smaller one.
Reduce pump perform-
ance using the R100
display 5.3.6 Maxi-
mum speed.
Borehole filter is
blocked.
Borehole service is re-
quired.
bar
5.0
4.5
4.0
3.5
3.0
2.5
2.0
A
To Next Page
Loading...
