SHENZHEN INVT ELECTRIC CO., LTD. CHV160 Operation Manual
84
7. Failure Inspection and Elimination
7.1 Failure Information and Elimination
Failure
Code
Failure Type
Possible Failure Reason
Solution
OUT1
IGBT Ph-U Fail
OUT2
IGBT Ph-V Fail
OUT3
IGBT Ph-W Fail
1
Accelerate too fast
2
IGBT of this Phase internal damaged
3
Failure action caused by interfere
4
Check the ground is in good condition
or not
Add more acceleration time
for technical support
Inspect the external equipment to
ensure there is interfere source or
not
OC1
Acc Overcurrent
1. Accelerate too fast
2. Main voltage is lower
3. The capacity of this inverter is not
enough
1 Add more acceleration time
2. Inspect the input main power
3. Select more powerful inverter
OC2
Dec Overcurrent
1. Decelerate too fast
2. Inertia Torque of load is too large
3. The capacity of this inverter is not
enough
1. Add more deceleration time
2. Add suitable external brake unit
3. Select more powerful inverter
OC3
Run Overcurrent
1. Jump or abnormity of load
2. The main voltage is lower
3. The capacity of this inverter is not
enough
1. Inspect the load or decrease
the abrupt change of load
2. Inspect the input power
3. Select more powerful inverter
OV1
Acc Overvoltage
1. Input voltage abnormity
2. Re-start the running motor after instant
power failure
1. Inspect input power
2. Avoid stop then re-start.
OV2
Dec Overvoltage
1. Deceleration too fast
2. Load inertia too large
3. Input voltage abnormity
1. Decrease the deceleration time
2. Add more brake unit
3. Inspect input power
OV3
Run Overvoltage
1. Input voltage abnormity changed
2. Load inertia too large
1. Install input reactor
2.
Add suitable external brake unit
UV
UV of Bus Line
1
The mains voltage is low.
1
Inspect the input mains power
OL1
Motor Overload
1. The mains voltage is too low.
2. The motor rated current is set up
improperly
3. The motor has locked rotor or load
sudden change is too big
4. The inverter’s capacity is much large
than the motor’s
1. Examine the voltage of the
power network
2. Re-setup the motor current
rating
3. Check the load, adjust the
torque lifting capacity
4. Chose proper motor
OL2
Invert Overload
1. Accelerate too fast
2. Restart the motor while it is rotating
3. The voltage of the power network is too
low
4. Too big load
1. Reduce the acceleration
2. Avoid restart the motor after
stop is just pressed
3. Examine the voltage of the
power network
4. Chose inverter having a higher
horsepower
SPI
Input phase fail
Phase loss of input phases R, S, T.
1. Check the input power supply
2. Check the wiring
SPO
Output ph fail
1. Output phase loss of phases U, V, W
(or serious asymmetry of the three
loading phases)
2. Without motor, pre-excitation is failure
to end during pre-excitation period
1. Inspect output wiring
2. Inspect motor and cables
