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QUICK REFERENCE OF PARAMETERS, ALARMS AND FAULTS
Fault / Alarm
F021
Undervoltage on the DC Link
F022
Overvoltage on the DC Link
F031
Fault in Communication with
Expansion Accessory
F032
Comm. Plug-in module
comunication Lost
F033
VVW Self-tuning Fault
A046
Motor Overload
A050
IGBTs Overtemperatures
F051
IGBTs Overtemperatures
F067
Incorrect Encoder/ Motor
Wiring
F070
Overcurrent/Shortcircuit
F072
Motor Overload
F078
Motor Overtemperature
F079
Encoder Signal Fault
F080
CPU Fault (Watchdog)
24 | CFW300
Description
Undervoltage fault on the intermediate
circuit.
Overvoltage fault on the intermediate
circuit.
Main control cannot establish the
communication link with the IOs
expansion accessory.
Main
control
cannot
establish
the communication link with the
communication acccessory.
Stator resistance setting fault P409.
Motor overload alarm.
Overtemperature alarm from the power
module temperature sensor (NTC).
Overtemperature fault measured on the
temperature sensor of the power pack.
Fault related to the phase relation of the
encoder signals.
Overcurrent or short-circuit on the
output, DC Link or braking resistor.
Motor overload fault.
Overtemperature fault measured on the
motor temperature sensor (Triple PTC)
via analog input AIx
Fault of encoder signals absent.
Fault
related
to
the
supervision
algorithm of the inverter main CPU.
Possible Causes
Wrong voltage supply; check if the data on the inverter label
comply with the power supply and parameter P296.
Supply voltage too low, producing voltage on the DC Link
below the minimum value (Level F021) according to
1.2 on page
29.
Phase fault in the input.
Fault in the pre-charge circuit.
Wrong voltage supply; check if the data on the inverter label
comply with the power supply and parameter P296.
Supply voltage is too high, producing voltage on the DC Link
above the maximum value (Level F022) according to
1.2 on page
29.
Load inertia is too high or deceleration ramp is too fast.
P151 setting is too high.
Accessory damaged.
Poor connection of the accessory.
Problem in the identification of the accessory; refer to P027.
Accessory damaged.
Poor connection of the accessory.
Problem in the identification of the accessory; refer to P028.
Stator resistance value in P409 does not comply with the
inverter power.
Motor connection error; turn off the power supply and check
the motor terminal box and the connections with the motor
terminals.
Motor power too low or too high in relation to the inverter.
Settings of P156 is too low for the used motor.
Overload on the motor shaft.
High temperature at IGBTs. P030 >Level A050, according
to
Table 1.3 on page
29.
High ambient temperature around the inverter and high
output current. For further information, refer to of the
user's manual available for download on the website:
www.weg.net.
Blocked or defective fan.
Heatsink is too dirty, preventing the air flow.
High temperature at IGBTs. P030 >Level F051, according to
Table 1.3 on page
29.
High ambient temperature around the inverter and high
output current. For further information, refer to of the
user's manual available for download on the website:
www.weg.net.
Blocked or defective fan.
Heatsink is too dirty, preventing the air flow.
Output motor cables U, V, W are inverted.
Encoder channels A and B are inverted.
Encoder was not properly mounted.
Short-circuit between two motor phases.
IGBTs module in short-circuit or damaged.
Start with too short acceleration ramp.
Start with motor spinning without the Flying Start function.
P156, P157 or P158 setting is too low in relation to the motor
operating current.
Overload on the motor shaft.
Overload on the motor shaft.
Load cycle is too high (high number of starts and stops per
minute).
High ambient temperature around the motor.
Poor contact or short-circuit (3k9 <R
Motor thermistor not installed.
Motor shaft is stuck.
Wiring between encoder and interface accessory to encoder
broken.
Encoder defective.
Electric noise.
Inverter firmware fault.
Table
Table
<0k1).
PTC
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