Operating LEDs / Dis-
play
Cause Solution
Remote Off Remote communica-
tion is deactivated
If the communication
does not work, check
the connection and the
configuration parame-
ters for communication
on the external con-
troller.
Display shows
"ALOC"
Rotor unlocking func-
tion is in progress
Wait for the result of
this procedure (about
30 seconds). If proce-
dure fails, error code
E04 will appear.
Note: during the exe-
cution of this proce-
dure, vibration and
noise may occur. Wait
for the procedure to
complete.
8.4 Fault and error codes (Red LED)
Error code Cause Solution
E01 Internal communication lost Restart the pump
2
E02 High motor current Restart the pump
2
E03 DC Bus overvoltage Indicates excessive
power through the
pump. Confirm system
setup, verify correct
position and opera-
tion of check valves.
E04 Motor stall Restart the pump
2
E05 Data memory corrupted Restart the pump
2
E06 Voltage supply out of operating
range
Check the electrical
system voltage and
wiring connection.
E07 Motor thermal protection trip Check the presence of
foreign material
around impeller and
rotor that cause over-
load. Check installa-
tion conditions and
temperature of the
water and ambient air.
Wait until the motor is
cooled. If the error
persists try to restart
the pump
2
.
E08 Inverter thermal protection trip Check installation con-
ditions and ambient
air temperature.
E09 Hardware error Restart the pump.
E10* Dry run Check for system leak-
age or fill the system.
E11** Loss of phase Check power supply
E12 Internal communication error Switch off the pump
for 5 minutes and then
power on. If problem
persists, contact facto-
ry.
8.5 Alarm codes (Orange LED)
Alarm code Cause Solution
A01 Fluid sensor malfunction Switch off the pump for 5
minutes and then power
on. If the problem persists,
contact local B&G repre-
sentative.
A02 High temperature of the
fluid
Check water temperature
value
A03 Automatic speed reduction
to prevent inverter over-
heating
Check installation condi-
tions and rectify status of
the system
A05 Data memory corrupted Switch off the pump for 5
minutes and then power
on. If the problem persists,
contact local B&G repre-
sentative.
A06 External temperature
probe malfunction
Check the probe and the
connection to the pump
A07 External pressure sensor
malfunction
Check the sensor and the
connection to the pump
A08 Cooling fan failure (Only
on 2 HP and larger models)
Check for the presence of
foreign bodies which could
lock the fan rotation.
Switch off the pump for 5
minutes and then power
on. If the problem persists,
contact service.
A12 2–pump communication
lost
If both pumps show the
A12 alarm, check the con-
nection between the
pumps. If one of the pump
is switched off or shows an-
other error code, check the
section 8.1 and 8.2 to find
the problem
A20 Internal alarm Switch off the pump for 5
minutes and then power
on. If the problem persists,
contact local B&G repre-
sentative.
A31** Sensor P1 failure Check pressure sensor in-
stallation and wiring con-
nections
A32** Sensor P2 failure Check pressure sensor in-
stallation and wiring con-
nections
A33** Sensors P1 and P2 failure Check pressure sensor in-
stallation and wiring con-
nections
* For very low motor RPM, dry run condition cannot be properly detect-
ed.
** Applies to 3-Phase pumps only
8.6 Faults, causes, and remedies
The pump does not start
Cause Solution
No power. Check the power supply and ensure that it
is properly terminated to the pump pow-
er.
2
Switch off the pump for 5 minutes and then power on. If the problem persists, contact service.
8 Troubleshooting
14 ecocirc
®
XL INSTRUCTION MANUAL
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