DGFLOW DGB MV 30 - Page 39

39
Message
Cause
intervention
EXT OFF
The inverter is out of service by means of
external signal
Check the external signal
OVER
TEMP MOD
Inverter module overheating
-
Make sure the air cooling channels are free and that the fans
are working
- check the ambient temperature (max 45°C)
- check the maximum operating current
OVER
TEMP CAP
Inverter capacitors overheating
-
Make sure the air cooling channels are free and that the fans
are working
- check the ambient temperature (max 45°C)
- check the maximum operating current
OVER
TEMP BOX
Inverter internal overheating (box)
-
Make sure the air cooling channels are free and that the fans
are working
- check the ambient temperature (max 45°C)
- check the maximum operating current
UNDER
VOLTAGE
I
nverter power voltage too low
(under -15%)
Check the supply voltage and the section and length of the
inverter power cables
OVER
VOLTAGE
Inverter power voltage too high
(over +15%)
Check the supply voltage
LOW PRESS
(only with flow sensor) the working
pressure is close to zero
-
Check
the condition of the pipes (possible leakages)
- Check the operation of the pressure sensor
- Re-arm is only manual by pressing ESC.
i
-
DRY
(only with flow sensor) the pump cannot
reach the SET pressure
-
Check that the maximum pum
p pressure is greater than the
SET pressure
- Check that the pump is not worn or obstructed
none
-
The motor is faulty
- The motori s not connected
-
Check the operation of the motor
- Check the
- Check for voltage at the motor terminals
the FIXED SPEED pump fails to start
Message
Cause
intervention
none
The ammeter cutout of the fixed
-
speed
pump has tripped because the pump is
absorbing too much current
-
Check the current absorption at the maximum load
- Check the ammeter setting
- Check the voltage at pump terminals under load
PUMP 2
STOP
The pump is out of service (placed
manually out of service)
Put the pump back into service
(see. cap. 4. OUT OF SERVICE)
Pump always running even when not required
Message
Cause
intervention
none
-
System leaks
- Pressure sensor fault
- Switch off frequency parameter (OFF
FREQ) setting too low
- Flow rate sensor fault or blockage
-
Identify the leaks and repair
- Inspect and check the pressure sensor
- Set a higher switch off frequency
- Inspect and check the flow sensor
The pump stops too soon when requested
Message
Cause
intervention
None
-
Switch off frequency parameter (OFF
FREQ) setting too high
- Flow rate sensor fault or blockage
-
Set a lower switch off frequency
- Inspect and check the flow sensor
Pump performance below that shown on plate
Message
Cause
intervention
none
-
Air inside suction manifold
- Pump blocked or damaged
-
Bleed the suction system
- Inspect the pump and eliminate the problem