Troubleshooting - DGFLOW DGFIT T/T 06 Manual De Uso Y Mantenimiento

- Check that the inverter has been correctly connected to the power line (which is on)
- Check that the motor pumps have been correctly connected to the inverter
- Check that all the cables and connections are operative.
PROBLEM
The pump is not feeded
Messagge Cause
- Interruption of power supply
- Burned fuses
- Intervention of the line protections
INPUT (only mod. T/T) - connections LINE
ERROR and MOTOR were reversed
PROBLEM The current circuit breaker has tripped to protect the DGBOX power line
Messaggio Causa
- The residual current circuit breaker
is inadequate for inverter supply
PROBLEM The pump fails to start
Messaggio Causa
OFF The pump is out of service (placed
manually out of service)
PROBLEM The pump stopped and fails to re-start
Messaggio Causa
overcurrent absorption compared to
OVER
set value (parameter A in BASE
CURRENT
PARAMETER)
CURRENT Serious overcurrent absorption which
LIMIT inverter cannot cope with
- Lack of water at suction
DRY
- pump not primed
RUNNING
- suction blocked
(DRY RUN
- wrong direction of motor rotation
PF)
LOW PRESS
The system does not reach the
minimum pressure
LOW Deviation of the supply voltage higher
VOLTAGE than –15% of the plate voltage

TROUBLESHOOTING

intervention
Replace the power supply
Substitute the fuses
Check the correct protecttions setting
Check the connections LINE and MOTOR and
connect correctly
intervento
Replace the residual current circuit breaker with
a model suitable for the pulsating components
and in direct current (class A)
intervento
Put the pump back into service by pushing START
intervento
- check the correct current setting
- check the power voltage under load at pump
- make sure the motor pump is turning freely and is
- check the correct direction of rotation
- check the correct sizing of the wires
Make sure the motor pump is not blocked, reduce
the motor acceleration by means of the
ACCELERATION parameter.
- Check correct suction conditions
- prime the pump
- check the suction piping
- check the correct direction of motor rotation
Check that there are no broken pipes.
Check the supply voltage and the section and length
of the inverter power cables
52
terminals (min -15%)
not braked