53
HIGH
VOLTAGE
Deviation of the supply voltage
higher than +15% of the plate
voltage
Check the supply voltage
OVER
TEMP BOX
internal overheating due to
overload or excessive ambient
temperature
Make sure the air cooling channels are free and
that the fans are working, check the pump load
OVER
TEMP
MODULE
Module overheating due to
overload or excessive ambient
temperature
Make sure the air cooling channels are free and
that the fans are working, check the pump load
OVER
TEMP CAP
capacitors overheating due to
overload or excessive ambient
temperature
Make sure the air cooling channels are free and
that the fans are working, check the pump load
COM
ERROR
No communication between
control board and power board
Check the integrity of the connection cable and
connections; the power board could be damaged
LOW LEVEL
No level signal with level signal
input on
Make sure there is water at suction or check
level signal operation
EXT OFF
Placing out of service by means of
external signal
Check the external signal
P NC
No pressure signal or out of scale
Check the pressure sensor connections or replace
the sensor
-
Pressure sensor fault
Check the display pressure with a reference
manometer, re-calibrate or substitute the
pressure sensor
PROBLEM
Pump always running even when not required
Messaggio
Causa
intervento
-
System leaks greater then 2 l/min
Identify the leaks and repair
-
Flow sensor fault or locked open
Inspect and check the flow sensor
-
Minimum OFF FREQUENCY setting
too low
Set a higher minimum frequency
PROBLEM
The pump stops too soon when requested
Messaggio
Causa
intervento
-
Minimum OFF FREQUENCY setting
too high
Set a lower minimum frequency
-
Flow rate sensor fault
Check the flow rate sensor
PROBLEM
Low pump performances
Messaggio
Causa
intervento
-
Air inside suction manifold
Bleed the suction system
-
Pump blocked or damaged
Inspect the pump and eliminate the problem
