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9.1.1.4 Jockey pump protection against dry-running
The jockey pump control box is designed for dry-running protection.
This function is disabled at the factory. The factory setting is DRY%
trimmer set on value zero and physical jumper on the terminal
board.
If necessary, you can activate the dry-running protection during
commissioning.
The dry-running condition can be detected in two ways (according
to a specific setting):
•
Through a threshold of current absorbed by the motor,
by setting a value (% of the motor current) to DRY% with
the trimmer. If the detected current is under this set value, the
pump stops and dry-running alarm is activated.
•
Through a level switch (not included in the scope of supply),
by setting a value to DRY% (factory set to 0%) with the
trimmer to enable a contact of a level switch that stops the pump
and activates the alarm in case of water shortage.
The alarm automatically resets after one minute if the current value
returns above the set threshold (or the level switch contact is
closed). After three unsuccessful attempts within 60 minutes, a
manual reset is required.
The setting procedure is described in detail in the wiring diagram
supplied with the system.
9.1.1.5 Prolonged operation alarm
Prolonged operation alarm is given if the pump runs continuously
for more than eight hours.
This function is disabled at the factory and if necessary, can be
activated by the user during commissioning by following the
procedures below:
1. Set the mains switch to OFF.
2. Press and hold the STOP button.
3. Set the mains switch to ON while keeping the STOP
button pressed.
4. After a few flashes of all the LEDs, release the STOP button.
5. Now, by pressing the START button, the thermal alarm LED
turns on and off:
• With the LED on, the function is activated.
• With LED off, the function is deactivated.
6. To confirm the desired selection, wait for five seconds without
pressing any button.
7. Turn the mains switch to OFF.
The alarm condition must be reset manually.
The setting procedure is described in detail in the wiring diagram
supplied with the system.
9.1.1.6 Jockey pump control panel alarms
The LEDs on the interface, in addition to their main meaning
already described, can signal different alarm conditions by means of
flashing modes.
The table below shows the possible flashing modes.
Flashing
LED ON time
mode
[sec]
ON 50/50
0.5
ON 3/4
1.5
5 flashes
0.2
10 flashes
0.2
The alarms available are described below.
For more detailed information, refer to the wiring diagram.
LED OFF
Pause
time [sec]
time [sec]
0.5
0
0.5
0
0.2
1
0.2
1
LED (mode)
Alarm effect
Thermal overload
Alarm condition: the motor current is higher than the set value
(with trimmer AMP%).
ON fix
Pump stop,
LED indication
Clicson
Alarm condition: the Clicson contact on the motor is tripped.
ON 50/50
Pump stop,
LED indication
Unbalanced main supply phases
Alarm condition: the difference in current between the monitored
phases is greater than 30%.
ON 3/4
Pump stop,
LED indication
Missing phase
Alarm condition: in at least one of the monitored phases, the
current is zero.
ON 3/4
Pump stop,
LED indication
Dry Run protection - analogic (set trimmer DRY%>0)
Alarm condition: the motor current is lower than the set value (with
trimmer DRY%).
ON fix
Pump stop,
LED indication
Dry Run protection - digital (set trimmer DRY%=0)
Alarm condition: the contact of the dry-running level switch (not
included in the scope of supply) is open.
ON fix
Pump stop,
LED indication
Factory
Reset
setting
1)
Active
Auto reset
Manual reset
Inactive
Manual reset
Active
Manual reset
Active
2)
Inactive
Auto reset
2)
Inactive
Auto reset
21
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