Wilo Control ESK Series, Installation And Operating Instructions Manual

Page: 11 / 14

English
16 WILO SE 12/2015
Operation with two float switches (Fig. 4e)
• Select low-water protection (Fig. 2, item 11).
In this position, the device only activates the
pump and the yellow signal lamp (Fig. 1, item 2)
displays the filling phase.
CAUTION! Risk of malfunctions!
Make sure that the bridge between terminals 5 + 6
on the terminal strip (Fig. 2, item 4) is correctly
positioned.
8.3.5 Pressure boosting (Fig. 4f)
CAUTION! Risk of malfunctions!
Set water hardness potentiometer to its
maximum value (Fig. 2, item 7)!
Float switch in the tank + pressure switch
• Select low-water protection (Fig. 2, item 11).
In this position, the pressure switch is connected
to terminals 5 + 6 of the terminal strip (Fig. 2,
item 4).
• Set the time delay before restarting
After stopping due to low water, the pump will
start with a delay (1 to 30 minutes).
The delay is preset in the potentiometer (Fig. 2,
item 8).
During the waiting period, the yellow signal lamp
flashes (Fig. 1, item 2).
Pressure switch in the inlet pipe + pressure
switch
• Select low-water protection (Fig. 2, item 11).
In this position, the pressure switch is connected to
terminals 5 + 6 of the terminal strip (Fig. 2, item 4).
• Set the time delay before restarting
After stopping due to low water, the pump will
start with a delay (1 to 30 minutes).
The delay is preset in the potentiometer (Fig. 2,
item 8).
During the waiting period, the yellow signal lamp
flashes (Fig. 1, item 2).
9 Maintenance
DANGER! Risk of fatal injury!
When working on the open switchgear, there is
a danger of electric shock from touching the live
components.
• Before maintenance and repair work, disconnect
the system from the power supply and make
sure it cannot be switched on by unauthorised
persons.
10 Faults, causes and remedies
Have faults remedied by qualified personnel
only! Follow the safety instructions in
Chapter “Safety”!
Fault Causes Remedy
The pump does not start or constantly
stops working • Faulty mains connection
• The fuse for the pre-selected voltage
(Fig. 2, item 11) has been inserted
incorrectly or is defective
• Operating mode in position '0'
• The circuit for external control has
been interrupted
• No electrodes, float switches or
bridges are connected
• Reconnect a mains connection with
the appropriate available voltage.
• Insert fuse into the correct holder. If
necessary, replace the fuse.
• Place the switch (Fig. 1, item 5) into
position 'AUTO'.
• Close the circuit or check for presence
of the bridge (terminals 5 + 6 of the
terminal strip)
• Connect electrodes, float switch or
bridge, depending on the application
(Figs. 4a-f)
Pump fault at pump start) • Contactor problem
• Faulty cabling/wiring • Check relays.
• Check cabling/wiring.
Pump fault
Continuous fault indication • Thermal protection switch (Fig. 2,
item 1) triggered
• Check whether the configured rating
matches the rating specified on the
motor rating plate.
• Reset the fault using the “RESET”
switch.
If the fault remains, contact the
Service contact.
Faulty automation • Faulty earthing connection
• Exceptionally soft water
• Time delay set to '0'
• Check the earthing connections and
mass contacts of the pump
• Check setting (see § 6.3.1.1).
• Check the operation and setting of
time delay.
The pump starts up but the flow rate is
too low • The rotation speed is too low
• Incorrect direction of rotation
• Check the power supply and motor
connection.
• Switch two phases!