ENGLISH
GB
14
e39-e40
Protection
against
overcurrent
- Check that the circulator turns freely.
- Check that any antifreeze added does
not exceed the maximum percentage
of 30%.
e21-e30 Voltage Error
- Switch off system power.
- Wait for the warning lights on the control
panel to go off, then power the system
again.
- Check that the mains voltage is correct,
if necessary reset it at the plate values.
e31
Twin
communication
absent
- Check that the twin communication ca-
ble is intact.
- Check that both circulators are pow-
ered.
e42 Dry operation - Put the system under pressure.
e56
Motor excess
temperature
- Switch off system power.
- Wait for the motor to cool down
- Power the system again
e57 ; e58
f < 100 Hz
f > 5 kHz
Check that the PWM external signal is
operating and connected as specied.
Energy Efciency Index - EEI
The benchmark for the most efcient circulators is EEI ≤ 0,20.
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