PEDROLLO DGF/T M/M 8.5 Manual De Uso Y Mantenimiento página 45

Message Cause
HIGH Tension deviation higher than + 15% of
VOLTAGE the rating voltage
OVER TEMP. Overtemperature of the inverter
module due to overload or excessive
ambient temperature not allowed
COM ERROR communication between the control
board and power board is broken
LOW LEVEL No level signal with level Signal Input
active
EXT OFF Put out of service by means of external
signal, with external Signal Input active
P ERROR No pressure signal or out of scale
none Pressure sensor fault
Pump always running even when not required
PROBLEM
Message Cause
none System leaks, higher than 2 l/min
none Flow rate sensor fault or blockage
none Minimum OFF FREQUENCY setting too
low
PROBLEM The pump stops too soon when requested
Message Cause
none Minimum OFF FREQUENCY setting too
high
none Flow sensor fault
PROBLEM Pump performance is lower than that of rated plate
Message Cause
none Air inside suction manifold
none Pump blocked or damaged
Action
Stabilize the voltage to keep it within the tolerance of
+/- 15%
- check that there are no accidental overloads
- that the cooling fans are working
- improve the cooling of the environment
If the message persists, the electronic boards may be
damaged
Make sure there is water at suction or check level
signal operation
Place out of service by means of external signal
Check the pressure sensor connections or replace the
sensor
check the display reading with a pressure gauge,
recalibrate or replace the pressure sensor.
Action
Identify the leaks and repair
Inspect and clean the flow rate sensor
Set a higher minimum frequency
Action
Set a lower minimum frequency
Check the operation of the flow sensor
Action
Bleed the suction system
Inspect the pump and remove the problem
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