TWERD Power Electronics MFC710/AcR, Руководство пользователя

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MFC710/AcR - Section: 6. Failure codes
6. Failure codes
Table 6.1 – List of failure codes
Failure
codes
Displayed
name
Description Possible cause Counteraction
1 High
temperature Too high temperature of one
of the IGBT modules of the
AcR active rectifier. 1. Hindered airflow.
2. System overload.
3. Ambient temperature is too high.
1. Check ventilation efficiency (fan
efficiency and heat sink pollution).
2. Reduce system load.
3. Ensure proper temperature at the
place of installation.
3 High voltage
Udc High voltage in DC circuit. 1. The voltage on the mains side is
too high.
2. Intensive motor braking.
3. Too low current limit – par. 1.103.
4. Incorrect PI Udc controller
settings – par. 1.105, 1.106.
1. Check the mains.
2. Increase the braking time
(deceleration) of par. 1.31 or 1.33.
3. Increase the current limit – par.
1.103 (max. 150.0%)
4. Increase the kp Udc coefficient –
par. 1.105 (max. 400) and/or
decrease ki Udc coefficient at
parameter 1.106.
4 Low voltage
Udc Low voltage in DC circuit. 1. Lack of one phase of the mains
voltage.
2. Mains voltage too low.
3. Precharge circuit is defective.
1. Check the cables from the mains
side.
2. Check the supply voltage level.
3. Check the precharge circuit wires.
5 Short circuit A short circuit at the system
input (from the AcR active
rectifier side) or an IGBT
module fault. 1. Incorrect connection of measuring
and/or power wires.
2. Lack of, damaged or incorrectly
connected input choke.
3. Damage to the AcR active
rectifier IGBT module.
1. Check the correctness of the
connections and the condition of
the measuring and power wires.
2. Check the choke and the
correctness of its connection.
3. Contact the Service.
10 DC charging Pre-charging DC-link error. 1. Damage to the pre-charging
contactor or the pre-charging
control system.
1. Check the connections (wires,
plugs) of the precharge circuit.
11 Absence of
temp. sensor Lack of signal from the IGBT
module temperature sensor. 1. Unplugged sensor plug.
2. Damage to the sensor or
connecting wires.
1. Check the connections (wire,
plugs) of the temperature
measuring circuit.
2. Contact the Service.
12 Short circuit of
temperature
sensor Incorrect signal from the
IGBT module temperature
sensor. 1. Damage to the sensor or
connecting wires.
1. Check the connections (wire,
plugs) of the temperature
measuring circuit.
13 Low
temperature The temperature is too low
(below -10
0 C) of one of the
AcR active rectifier IGBT
modules.
1. The ambient temperature is too
low.
1. Ensure proper temperature at the
place of installation.
14 Mains fault Incorrect mains parameters.
1. The value of the supply voltage
(RMS) or its frequency is outside
the permissible range.
1a. Check the mains parameters.
1b. If the mains is unstable, wait until
the parameters return to the
correct values.
1c. If possible, connect the system to
another power supply.
16 High current
(software) Exceeding the permissible
current value (3 x In) from
the mains side - software
protection. 1. Incorrect setting of parameter
1.104 (due to e. g. changing the
choke without entering in the par.
1.104 new value of its
inductance).
2. Incorrect settings of the Id or Iq
current regulator (parameters:
1.107 ÷ 1.110).
3. Too intensive starting of the
motor or rapid change of its load.
4. Sudden voltage drop in the
mains.
5. Damaged capacitor in the LCL
input filter or incorrect connection
of the LCL filter.
1. Check the setting of par. 1.104
with inductance of the chokes from
the mains side.
2. Change the current regulator Id or
Iq setting in par. 1.107 ÷ 1.110
(default value = 115%)
3. Increase motor start time.
4. Wait until the mains parameters
return to the correct values. When
possible, connect the system to
another power supply.
5. Check that the capacitors have no
leaks or are not swollen. Check the
correctness of LCL filter
connections.
17 Phase missing One or two phases are
missing from the mains side. 1. One or two phases are missing
from the mains side.
2. Incorrect connection of the
frequency converter to the mains.
1. Ensure correct mains supply
values.
2. Check the correctness of
connections from the mains side.
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