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10. ALERTS .
A1: LACK OF WATER ALERT.
Warning:
A1
LACK OF WATER
Description: if Cervomatic EDP.2 detects lack of water in the inlet of the automatic control unit for more than 10 seconds, it will stop
the pump and the ART will be triggered.
System reaction: after 5 minutes ART system will restart the pump for 30 seconds, trying to restore the system. In case of persisting
lack of water, it will attempt another restart every 30 minutes for 24 hours. If, after repeat attempts, the system still detects a lack of water,
the pump will be permanently stopped until the damage is repaired.
Solution: there is a lack of water in the inlet, which resulted in the safety system to be triggered: verify the supply from the hydraulic
network. The pump can be primed using the push-button START/STOP ( the AUTO On/off LED light should be off; if not, press the
push-button to disable
it).
A2: LEVEL SENSOR ALERT.
Warning:
A2
LEVEL
Description: if a float switch is installed in the inlet tank, it will inmediately stop the pump when it detects a lack of water.The system will
show the message for lack of water.
System reaction: the pump will remain stopped until level sensor detects water in the tank.
Solution: check tank.
A3: TRANSDUCER DAMAGED ALERT.
Warning:
A3
TRANSDUCER
Description: transducer damage is displayed on the Cervomatic EDP.2´s LCD screen. Contact the technical service when this alert
was triggered.
System reaction: unit operation is interrupted.
Solution: contact with technical service.
A4: OVER-CURRENT ALERT.
Warning:
A4
OVERCURRENT
Description: the pump is protected against over-current depending on the current value defined in the configuration menu. These over-
currents are generally caused by malfunctions of the pump or in the electric supply.
System reaction: when a failure is detected, the system will attempt to restart the pump four times. If the pump is still tripped after the 4th
attempt, it will be switched off until the damage is repaired.
Solution: check the state of the pump; for example, the impeller could be blocked. Verify the current value entered in the configuration menu (
it is always recommended to define current values as 15% above the rated pump current). Check for damaged fuses. Once the possible
problems have been solved, the pump is put back into operation; then, the "INSTALLATION" menu (see chapter configuration) is
displayed for entering the adequate current values.
A5: DISCONNECTED PUMP ALERT.
Warning:
A5
PUMP OFF
Description: Cervomatic EDP.2 cannot detect current from the pump and has disconnected the same to avoid severe damaging.
There are three 10 A fuses. In case of pumps with different consumption values, suitable fuses must be chosen.
System reaction: the system will remain off until the problem is solved externally.
Solution: check the state of the fuses and replace as necessary. The winding of the motor and the pump consumption should also be
checked. Once the possible problems have been solved, the pump is put back into operation; then, the "INSTALLATION" menu (see
chapter Configuration) is displayed for entering the adequate current values.
A6: ACCUMULATOR ALERT.
Warning:
A6
ACCUMULATION
Description: t he system periodically analyses the state of the accumulator of the hydraulic installation, however only in pressure -dependent
mode.
System reaction: the system will continue running even if accumulator pressure is insuficient, however, it is highly recommended to repair it
immediatly .
Solution: the system has detected that the accumulator is damaged. The load of air, the condition of the membrane and the state of the
spherical housing should be checked and replaced if necessary.
BLANK SCREEN.
Warning: blank screen.
Solution: check electric supply as well as the position of the voltage selector. In case that no faulty conditions can be detected,
contactthe technical service.
Simultaneous alerts are displayed on the LCD screen successively every 3 seconds. All alerts can be acknowledged by pressing the On/off
push-button in manual mode
.
WARNING: Cervomatic EDP.2 has a volt-free contact with 1 A maximum intensity for the transmission of signals to different types of alarm
equipment (optical, acoustics, etc). See connection diagram.
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Failure verification: LED LIGHT FAILURE FLASHING.
Final failure: LED LIGHT FAILURE ON.
Final failure: LED LIGHT FAILURE ON.
Final failure: LED LIGHT FAILURE ON.
Failure verification: LED LIGHT FAILURE FLASHING.
Final failure: LED LIGHT FAILURE ON.
Final failure: LED LIGHT FAILURE ON.
Final failure: LED LIGHT FAILURE ON.
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Cervomatic EDP.2
EN
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0. DESCRIPTION.
Cervomatic EDP.2 is a compact automatic control unit for controlling pumps with single-phase and three-phase motors. The system
manages the start and stop of the pump depending on the pressure detected by its internal transducer and the flow detected by the
internal flow sensor. It can be run either in pressure-dependent mode (start pressure and stop pressure) or on/off mode (start
pressure between 1÷5 bar, stopped by the flow sensor).
1. CLASSIFICATION AND TYPE.
According to EN-60730-1 Cervomatic EDP.2 is a unit of independent assembly, type 1B with software of class A, for floodproof
installation in clean or slightly contaminated environments.
2. MAIN CHARACTERISTICS.
Pump controlled by power relay.
2 operating modes: pressure-dependent or on/off mode.
Control and protection system against over-current.
Control and protection system against dry running.
ART function (Automatic Reset Test). When the unit is stopped due to a lack of water, the ART system attempts to re-start the unit in
programmed intervals.
Automatic restore of system after interruption of power supply. System restores the previous mode.
Volt-free contact for monitoring the alerts displayed in screen, which were caused by irregularities or problems within the system.
Input for monitoring the minimum water level in inlet tank. This function is independent of the protective system against dry running and
optional.
Internal pressure transducer.
Internal flow sensor.
Integrated accumulator.
Control panel:
LCD screen, for configuration menu and indication of alerts with permanent pressure indication.
START/STOP push-button to operate the pump manually.
AUTOMATIC push-button with mode LED .
Keyboard for accessing the configuration menu.
Digital gauge.
3. CONTROL PANEL.
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3
7 7
8
1.- LCD screen: during the configuration process, it shows the different parameters. When Cervomatic EDP.2 is running, it shows the
current pressure, the configured target pressure and the alerts.
2.- Push-button PUMP Start-Stop: will only run with the automatic mode disabled (AUTO LED off).
3.- Push-button AUTO On/Off: for choosing between manual and automatic operating modes.
4.- Push-button MENU: for accesing or exiting the configuration menu.
5.- Push-button ENTER: used for saving configured values. Each time the button is pushed, a new field opens in the configuration
menu. Press MENU if you wish to exit the configuration sequence.
6.- Push-buttons
and
: to increase or decrease the configuration parameters.
7.- LINE LED (green): lit when the unit is connected to the electric supply.
8.- FAILURE LED (red): lit or flashing depending on type of failure.
9.- AUTO LED (green): lit in automatic mode and off in manual operating mode.
10.- PUMP LED (yellow): lit when the pump is running.
Cervomatic EDP.2
MENU
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10
2
4
5
Fig 1. Control panel
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