gefran VDI100 Series Instruction Manual page 331

LED display
DC bus voltage is lower than
UV
the UV detection level or the
Under voltage
pre-charge contactor is not active
while the inverter is running.
190Vdc: 230V class;
380Vdc: 460V class
(The detection value can be
adjusted by 07-13).
IPL input phase loss
Phase loss at the input side of
IPL
the inverter or input voltage
imbalance, active when 08-09 =
1 (enabled)
OPL output phase loss
Phase loss at the output side of
OPL
the inverter, active when 08-10 =
1 (enabled).
OH1 The temperature of the heat sink
Heatsink overheat is too high.
Note: when OH1 fault occurs
OHI
three times within five minutes,
it is required to wait 10 minutes
before resetting the fault.
OL1
Motor overload
Internal motor overload protection
OLI
tripped, active when protection
curve 08-05 = xxx1.
OL2 Inverter thermal overload pro-
Inverter overload tection tripped.
If an inverter overload occurs 4 ti-
OL2
mes in five minutes, it is required
to wait 4 minutes before resetting
the fault.
OT Inverter output torque is higher
Over torque detection than 08-15 (over torque detection
level) for the time specified in
08-16. Parameter 08-14 = 0 to
activate.
UT
Inverter output torque is lower
Under torque
than 08-19 (under torque detec-
detection
tion level) for the time specified
in 08-20. Parameter 08-18 = 0 to
activate.
run
Switch for Motor1/
Switch for Motor1/Motor2 in
Motor2
running time
OS Motor speed exceeds level set
Over speed in 20-20 (PG Over speed Level)
for the time set in 20-21 (PG over
speed time). Active when 20-19
O5
(= 0 or 1).
This fault is active V/f + PG and
SV control mode (00-00 = 1
or 3 or 4). Motor speed can be
monitored by 12-22
PGO PG pulses are not received by the
PG inverter for the time specified in
Open circuit 20-26 (PG open circuit detection
time).
This fault is active V/f + PG and
SV control mode (00-00 = 1 or
3 or 4).
VDI100 • Instruction manual
Description
• The input voltage is too low.
• Input phase loss.
• Acceleration time set too short.
• Input voltage fluctuation.
• Pre-charge contactor damaged.
• DC bus voltage feedback signal value not
incorrect.
• Wiring loose in inverter input terminal.
• Momentary power loss.
• Input voltage imbalance.
• Wiring loose in inverter output terminal.
• Motor rated current is less than 10% of the
inverter rated current.
•Ambient temperature too high.
• cooling fan failed
• Carrier frequency set too high.
• Load too heavy.
•Voltage setting V/f mode too high, resulting in
over-excitation of the motor.
•Motor rated current (02-01) set incorrectly.
•Load too heavy.
• Voltage setting V/f mode too high, resulting
in over-excitation of the motor.
• Inverter rating too small.
• Load too heavy.
• Load too heavy.
•Sudden drop in load.
•Belt break.
• Execute command for switching motor2 in
running time
• Execute command for switching motor in
running time
•Motor speed overshoot (ASR)
•PG ppr set incorrectly.
•Overspeed parameters set incorrectly.
•PG cable disconnected.
•PG has no power.
•Mechanical brake active preventing motor
from turning.
Cause
• Check the input voltage.
• Check input wiring.
• Increase acceleration time.
• Check power source
• Replace pre-charge contactor
• Replace control board or complete inverter.
• Check input wiring / faster screws.
• Check power supply
• Check output wiring / faster screws.
• Check motor & inverter rating.
•Install fan or AC to cool surroundings.
•Replace cooling fan.
•Reduce carrier frequency.
•Reduce load / Measure output current
•Check V/f curve.
•Check motor rated current
•Check and reduce motor load, check and
operation duty cycle.
•Check V/f curve.
•Replace inverter with larger rating.
•Check and reduce motor load, check and
operation duty cycle.
• Check over torque detection parameters (08-
15 / 08-16).
• Check and reduce motor load, check and
operation duty cycle.
•Check under torque detection parameters
(08-19 / 08-20).
•Check load / application.
•Revise the sequence control and switch motor
in top time.
•Check ASR parameters group 21.
•Check PG parameters
•Check overspeed parameters 20-20/20-12
•Check PG wiring.
•Check PG power-supply.
•Make sure brake is released.
Possible solutions
331