Midea MAD020T1N1S1 Technical Manual page 92

MCAC-PDSM-2013-04
the inverter output to stop the motor and make it stay free running condition. If there is alarm, the
inverter will display alarm code, and will not cut off the inverter output during alarm state, the
motor still be controlled by the inverter.
Many methods of inverter error reset: Press the Reset button in keypad of inverter, reset function
of terminals, or if necessary, power off the main power for a while then can reset the error. If error
has been solved, the inverter will recover to normal operation. If error still not has been solved,
the inverter will trip out again.
The alarm reset of inverter only effect by operate the Esc button in keypad of inverter.
When no display after power on:
1. Use the multimeter to check whether input power of inverter is same as the rated voltage.
2. Check whether the Charge lamp whether lights up.
3. If the above are normal, then maybe the power switch has error.
When the inverter does not run after the motor operation:
Cut off the connecting wire between inverter and motor, operate the inverter in 50Hz, and use
multimeter to check whether there is equivalent AC between U, V and W. Use simulate voltage
meter for measurement (the range is AC500V). If there is not equivalent voltage or no voltage,
then the inverter had been damaged.
Notes:
Between U, V and W are high –frequency impulse.
Code Type
Over current error, current is
E001 higher than 150% of
Maximum current.
E002 Power module error
Bus overvoltage error, the
E003
value is more than 570V.
Bus voltage error, the value
E004
is less than 171V.
Motor load error, the motor
E005 current is higher than
standard inverter current.
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Midea Precision AC Technical Manual-Down Delivery Series
Error reason
Speed up and down times too
short.
The inverter power is too small
Voltage is too low.
Speed up and down time is too
short.
The inverter output side is short
circuit.
Power module is damaged
Outer disturb.
Speed down time is too short,
regenerated energy too large.
Voltage is too high.
Load inertia is too large,
regenerated energy too large.
Voltage of power supply is too low.
Voltage is too low.
Load inertia is too large.
Not correct standard current setting
of motor.
Solutions
Extend the speed up and down time.
Select a large power inverter.
Check the input voltage.
Extend the speed up and down time.
Check the insulation of motor.
Replace the module.
eliminate it.
Find out disturb and
Extend the speed down time.
Check the input voltage.
Select a large power inverter.
Check the input voltage.
Check the input voltage.
Check the load inertia, adjust torque
lifting capacity.
Reset the standard current of motor.
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