9. Troubleshooting the error codes:
Listed below are potential diagnostic error codes which will appear on the LED display in case
of a malfunction.
FAULTS
CONTROL
PANEL
CAUSES
REMEDIES
The circulator is
noisy
LED on
Suction pressure is
insufficient - cavitation
Increase the system suction
pressure within the
permissible range.
LED on
Presence of foreign bodies
in the impeller
Disassemble the motor and
clean the impeller.
Loud noises of
water circulation
Flashing white
LED
Air in the system
Vent the system. Repeat
fill and purge steps.
LED on
The flow is too high
Reduce the pump speed.
Circulator is not
running although
the electrical
power supply is
switched on
LED off
Lack of power supply
Verify voltage value of the
electric plant.
Verify the connection of the
motor.
One fuse in the installation
is blown
Verify the fuses of the plant.
The circulator is defective
Replace the pump.
Overheating
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.
LED red
The rotor is blocked
Disassemble the motor and
clean the impeller. See
unblocking procedure below.
Insufficient supply voltage
Verify that the power supply
matches the data on the name
plate.
Building does not
get warm.
LED on
The circulator
performance is too low
Increase the suction head.
Increase speed.
Unblocking Procedure:
A red light in the LED indicates the circulator rotor is blocked or sticking. Turn the selector to the position MAX, disconnect and
connect power supply to start the automatic release process. The circulator makes 100 attempts to restart (process lasts approx-
imately 15 minutes). Every restart is signalled by a short flash of white LED light. If the blocking is not removed through the auto-
matic release process after 100 attempts to restart, the circulator goes into standby and the LED remains solid red. Perform the
manual unblocking steps described below.
1. Disconnect power supply - the warning light switches off.
2. Close both isolating valves and allow cooling. If there are no shut-off devices, drain the system so that the fluid level is
beneath that of the circulator.
3. Loosen 4 motor bolts. Remove motor from casing. Carefully pull the rotor/impeller from the motor.
4. Remove impurities and deposits from the impeller and casing.
5. Reinsert the rotor/impeller into the motor.
6. Set the dial to the MAX position.
7. Connect power supply. Check for impeller rotation.
8. If the circulator still doesn’t run it will need to be replaced.
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