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7. Troubleshooting the error codes: Listed below are potential diagnostic error codes which will appear on the LED display in case
of a malfunction.
FAULTS
The circulator is
noisy
Loud noises of
water circulation
Circulator is not
running although
the electrical
power supply is
switched on
Building does not
get warm.
6
CONTROL
CAUSES
PANEL
Suction pressure is
LED on
insufficient - cavitation
Presence of foreign bodies
LED on
in the impeller
Flashing white
Air in the system
LED
LED on
The flow is too high
Lack of power supply
One fuse in the installation
is blown
LED off
The circulator is defective
Overheating
LED red
The rotor is blocked
Insufficient supply voltage
The circulator
LED on
performance is too low
REMEDIES
Increase the system suction
pressure within the
permissible range.
Disassemble the motor and
clean the impeller.
Vent the system. Repeat
fill and purge steps.
Reduce the pump speed.
Verify voltage value of the
electric plant.
Verify the connection of the
motor.
Verify the fuses of the pump.
Replace the pump.
Let the pump cool down for
some minutes. Then try to re-
start it. Verify that the water
and ambient temperature are
within the indicated
temperature ranges.
Disassemble the motor and
clean the impeller. See
unblocking procedure below.
Verify that the power supply
matches the data on the name
plate.
Increase the suction head.
Increase speed or P setting.
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