Install Instructions
CAUTION: Do not attempt to remove LED panel from circulator. Serious damage to circulator electronics may result.
ATTENTION: N’essayez pas de retirer le panneau de LED du circulateur. Des dommages sérieux à l’électronique du circulateur peuvent 
en résulter.
6
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 pump.
The circulator is defectiveReplace 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 or ∆P setting. 
7.   Troubleshooting the error codes: Listed below are potential diagnostic error codes which will appear on the LED display in case 
of a malfunction.








