User`s manual

248 • Vacon apfiff09 marine
Tel. +358
7
F12 Brake chopper supervision
Brake chopper supervision generates pulses to the brake resistor for response. If no response
is received within set limits a fault is generated.
Possible cause:
1. No brake resistor installed.
2. Brake resistor is broken.
3. Brake chopper failure.
Correcting measures:
 Check brake resistor and cabling.
 If these are ok the chopper is faulty. Contact your local distributor.
F13 Drive undertemperature fault
Possible cause:
1. Heatsink temperature is under 10C
F14 Drive overtemperature 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
 Check correct amount and flow of cooling air.
 Check the heatsink for dust.
 Check ambient temperature.
 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
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.
 Check motor and load.
F16 Motor over temperature
Motor overheating has been detected by frequency converter motor temperature model. Motor
is overloaded.
Possible cause:
1. Motor load is too high.
2. Motor values are set incorrectly.
Correcting measures:
 Decrease motor load.
 If no motor overload exists, check the temperature model parameters.