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Aquavar Intelligent Pump Controller
CentriPro
Warning/Alarm
Description
Cause
Remedy
24 — External fan fault
The fan warning function checks if the
fan is running. The fan warning can be
disabled on [14– 53] Fan Monitor.
Check for proper fan operation.
Cycle power to the frequency
converter and check that the fan
operates briefly at startup.
Check the sensors on the heatsink
and control card.
25 — Brake resistor short
circuit
The brake resistor is monitored during
operation. If a short circuit occurs,
the brake function is disabled and
the warning appears. The frequency
converter is still operational but
without the brake function.
Remove power to the frequency
converter and replace the brake
resistor (see [2–15] Brake Check).
26 — Brake resistor power
limit
The power transmitted to the brake
resistor is calculated as a mean value
over the last 120 seconds of run
time. The calculation is based on the
intermediate circuit voltage and the
brake resistance value set in [2–16]
brake Max. Current.
The warning is active when the
dissipated braking is higher
than 90% of the brake resistance
power.
If Trip [2] is selected in [2–13]
Brake Power Monitoring, the
frequency converter will trip
when the dissipated braking
power reaches 100%.
27 — Brake chopper fault
The brake transistor is monitored
during operation and if a short circuit
occurs, the brake function is disabled
and a warning is issued.
The frequency converter is still
operational but, since the brake
transistor has short-circuited,
substantial power is transmitted
to the brake resistor, even if it is
inactive.
Remove power to the frequency
converter and remove the brake
resistor.
28 — Brake check failed
The brake resistor is not connected or
not working.
Check [2–15] Brake Check.
29 — Heatsink temp
The maximum temperature of the
heatsink has been exceeded. The
temperature fault will not reset until
the temperature falls below the
reset heatsink temperature. The trip
and reset points are based on the
frequency converter power size.
Check for the following conditions:
• Ambient temperature too high.
• Motor cable too long.
• Incorrect airflow clearance above
and below the frequency converter.
• Blocked airflow around the
frequency converter.
• Damaged heatsink fan.
• Dirty heatsink.
30 — Motor phase U
missing
Motor phase U between the frequency
converter and the motor is missing.
Remove power from the frequency
converter and check motor phase U.
31 — Motor phase V
missing
Motor phase V between the frequency
converter and the motor is missing.
Remove power from the frequency
converter and check motor phase V.
32 — Motor phase W
missing
Motor phase W between the frequency
converter and the motor is missing.
Remove power from the frequency
converter and check motor phase W.
33 — Inrush fault
Too many power-ups have occurred
within a short time period.
Let the unit cool to operating
temperature.
34 — Fieldbus
communication fault
Communication between the fieldbus
and the communication option card is
not operating.
