52
TROUBLESHOOTING
-
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
intervention
-
Interruption of power supply
Replace the power supply
-
Burned fuses
Substitute the fuses
-
Intervention of the line protections
Check the correct protecttions setting
INPUT
ERROR
(only mod. T/T) - connections LINE
and MOTOR were reversed
Check the connections LINE and MOTOR and
connect correctly
PROBLEM
The current circuit breaker has tripped to protect the DGBOX power line
Messaggio
Causa
intervento
-
The residual current circuit breaker
is inadequate for inverter supply
Replace the residual current circuit breaker with
a model suitable for the pulsating components
and in direct current (class A)
PROBLEM
The pump fails to start
Messaggio
Causa
intervento
OFF
The pump is out of service (placed
manually out of service)
Put the pump back into service by pushing START
PROBLEM
The pump stopped and fails to re-start
Messaggio
Causa
intervento
OVER
CURRENT
overcurrent absorption compared to
set value (parameter A in BASE
PARAMETER)
- check the correct current setting
- check the power voltage under load at pump
terminals (min -15%)
- make sure the motor pump is turning freely and is
not braked
- check the correct direction of rotation
- check the correct sizing of the wires
CURRENT
LIMIT
Serious overcurrent absorption which
inverter cannot cope with
Make sure the motor pump is not blocked, reduce
the motor acceleration by means of the
ACCELERATION parameter.
DRY
RUNNING
(DRY RUN
PF)
-
Lack of water at suction
-
pump not primed
-
suction blocked
-
wrong direction of motor rotation
-
Check correct suction conditions
-
prime the pump
-
check the suction piping
-
check the correct direction of motor rotation
LOW PRESS
The system does not reach the
minimum pressure
Check that there are no broken pipes.
LOW
VOLTAGE
Deviation of the supply voltage higher
than –15% of the plate voltage
Check the supply voltage and the section and length
of the inverter power cables
