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Aquavar Intelligent Pump Controller
CentriPro
Warning/Alarm
Description
Cause
Remedy
9 — Inverter overloaded
The frequency converter is about
to cut-out because of an overload
(too high current for too long). The
counter for electronic, thermal inverter
protection gives a warning at 98% and
trips at 100% while giving an alarm.
The frequency converter cannot be
reset until the counter is below 90%.
The fault is that the frequency
converter is overloaded by more
than 100% for too long.
Compare the output current shown
on the LCP with the frequency
converter rated current.
Compare the output current shown
on the LCP with the measured motor
current.
Display the Thermal Drive Load on
the LCP and
10 — Motor overload
temperature
According to the electronic thermal
protection (ETR), the motor is too hot.
Select whether the frequency converter
gives a warning or an alarm when the
counter reaches 100% in 1–90 Motor
Thermal Protection.
The fault occurs when the motor
is overloaded by more than 100%
for too long.
Check for motor overheating.
Check if the motor is mechanically
overloaded.
Check that the motor current set in
[1–24] Motor Current is correct.
11 — Motor thermistor over
temp
The thermistor might be disconnected.
Select whether the frequency converter
gives a warning or an alarm in 1–90
Motor Thermal Protection.
Check for motor overheating.
Check if the motor is mechanically
overloaded.
When using terminal 54, check that
the thermistor is connected correctly
between terminal 54 (analog voltage
input) and terminal 50 (+10 V
supply) and that the terminal switch
for 54 is set for voltage. Check [1–93]
Thermistor Source selects terminal
54.
When using digital inputs 18 or
19, check that the thermistor is
connected correctly between either
terminal 18 or 19 (digital input PNP
only) and terminal 50. Check [1–93]
Thermistor Source selects terminal
18 or 19.
12 — Torque limit
The torque has exceeded the value in
4–16 Torque Limit Motor Mode or the
value in 4–17 Torque Limit Generator
Mode. 14–25 Trip Delay at Torque Limit
can change this from a warning only
condition to a warning followed by an
alarm.
If the motor torque limit is exceeded
during ramp up, extend the ramp up
time.
If the generator torque limit is
exceeded during ramp down, extend
the ramp down time.
If torque limit occurs while running,
possibly increase the torque limit. Be
sure the system can operate safely at
a higher torque.
Check the application for excessive
current draw on the motor.
