EN
25
9 Common operational issues
Causes associated with the
unit
Causes not associated with the unit
1. The unit is damaged.
2. Restart button is stuck.
3. Parameter setting display
is open.
1. The voltage is lower than 230 V.
2. The pump is broken.
3. Faulty wire connection.
1. The unit is damaged.
2. Check valve is stuck.
3. Water contains iron
ore and iron oxides
1. The unit is damaged.
2. Pressure range is too low.
1. The unit is damaged.
2. The controller piping is
broken
1. Lack of water
2. Pump is broken.
3.Leak at pump inlet
4.Maximum delivery height of the pump is
lower than the switching pressure +0.3 bar
(MODE 1)
5. Maximum delivery height of the pump is
lower than the shutdown pressure (MODE 2)
1. The unit is damaged.
2. The pressure sensor is
damaged.
The actual pressure in the pipe is higher than
9.9 bar for more than 5 seconds.
Starting and stopping time is repeatedly less
than 30 seconds after the 15th time when
there is a leak in the pipe.
10 Suggestion
1. Try suggesting to customers that they use the "dE 1" mode. The "dE 2" mode can be used on other
special occasions.
2. When the user uses the "dE 2" mode, the switch-off pressure must be lower than the maximum delivery
height of the pump, the switch-off pressure should be 0.3-0.5 bar lower than the maximum delivery height
of the pump. For example, if the maximum delivery height of the pump is 40 metres, the switch-off
pressure should be set to 3.5-3.7 bar.