BL6-U Parallel Integrated Controller Quick Commissioning User Manual
48
Appendix VI Driver Fault
DRIVER FAULT LIST
DC bus under voltage
(for 400V drive, 380V
at UV protection; for
200V drive, 220V at
UV protection)
1. Phase lost on input supply;
2. Instantaneous power lost;
3. Excessive input voltage fluctuati
on;
4. Loose terminals at input;
5. Surge Resistance didn’t release;
6. UPS running, but X18 is invalid.
1. UV error after power ON;
Check input power supply;
Check input power cable
terminals; Check cable between
main board and power board;
2. Without load, up running is
normal, but down running shows
UV error, Check surge resistance;
3. UV error while ARD running,
Check X18 connection;
4. UV error after power off.
This is normal condition, system
record each time of power off by
UV error.
DC bus over voltage
(for 400V drive, 760V
at OV protection; for
200V drive, 410V at
UV protection)
1. Too short deceleration time;
2. Brake resistance value mismatch;
3. Supply voltage too high;
4. No connection to braking resistor
or abnormal braking resistor or
lack of capacity.
1. Increase deceleration time;
2. Connect capacity and connection
of brake resistor;
3. Check power supply.
Heat sink overheated
Find temperature of
module is higher than
a preset value and
keep for certain time;
Find temperature of
module is lower than
zero degree and keep
for certain time;
1. Excessively ambient temperature;
2. Damaged cooling fan;
3. Existence of heat source around;
4. Ambient temperature is below
zero degree;
5. Bad connection between main
board and power board.
1. Reduce ambient temperature;
2. Remove heat source around;
3. Check the fan and wiring;
4. Set FX-21 to OFF (disable minus
temperature warning);
5. Check cable between main board
and power board.
IPM fault
Find drive module has
serious short circuit
error, system trigger a
hardware over-
current protection.
Please get rid of
external short circuit
before retrying
1. IPM over current/short circuit;
2. IPM over heat;
3. Abnormal IPM control power
(UV);
4. Motor wire adhered or short to
ground;
5. Abnormal star-sealed contactor
action.
1. Check output short circuit;
2. Check motor short circuit;
3. Check star-sealed contactor
action;
4. Contact with supplier.
Overcurrent
Phase current of
controller has
exceeded limit and
keep for certain time
1. Inverter output short circuit;
2. Machine over-load;
3. Accel/decel time too short;
4. Encoder signals have a bad
connection;
5. Wrong motor or encoder
parameter setting:
(1)Wrong original point (Gearless);
(2)Rated slip is too large (Geared);
(3)Wrong poles setting;
(4)Wrong encode pulse setting;
(5)Wrong P & I parameter setting.
1. Check motor short circuit;
2. Check accel/decel time, slow
down if needed;
3. Check if inverter’s capacity match
load;
4. Check encoder connection:
(1) Check original point (Gearless);
(2) Check rated slip (Geared);
(3) Check poles setting;
(4) Check encoder pulse setting;
(5) Check P & I parameter setting.
CPU faults
Controller abnormal
Electro-Magnetic interference.
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