Vacon apfiff09 marine, Applications Manual

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apfiff09 marine VACON®
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299
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F14 Drive Over Temperature Fault
Possible cause:
1. Heatsink temperature is over acceptable limits. See user manual for the temperature limit.
Overtemperature warning is issued before actual trip limit is reached.
Correcting measures
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Check correct amount and flow of cooling air.
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Check the heatsink for dust.
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Check ambient temperature.
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Make sure that switching frequency is not too high in relation to ambient temperature
and motor load.
F15 Motor Stalled
The motor stall protection protects the motor from short time overload situations such as one caused
by a stalled shaft. The reaction time of the stall protection can be set shorter than that of the motor
thermal protection. The stall state is defined with two parameters, Stall current and Stall frequency
limit. If the current is higher than the set limit and output frequency is lower than the set limit the stall
state is true. There is actually no real indication of the shaft rotation. Stall protection is a type of over
current protection.
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Check motor and load.
F16 Motor over temperature
Motor overheating has been detected by the AC drive motor temperature mode. The motor is
overloaded. Calculated temperature has exceeded 105%.
Possible cause:
1. Motor load is too high.
2. Motor values are set incorrectly.
Correcting measures:
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Decrease motor load.
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If no motor overload exists, check the temperature model parameters.
F17 Motor underload fault
The purpose of the motor underload protection is to ensure that there is load on the motor when the
drive is running. If the motor loses its load there might be a problem in the process, for example, a
broken belt or a dry pump.
The underload curve is a squared curve set between the zero frequency and the field weakening
point. The protection is not active below 5 Hz (the underload time counter is stopped).
The torque values for setting the underload curve are set in percentage which refers to the nominal
torque of the motor. The motor's name plate data, parameter motor nominal current and the drive's
nominal current I
H
are used to find the scaling ratio for the internal torque value.
Correcting measures:
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Check load.