STEP
iAStar Frequency Inverter For Elevator Door Machine manual Instructions
63
8.2 solutions
Fault identification and treatment：
1) IPM fault
Possible causes: inverter over current
Inverter fault
Solutions: check load of door machine
Change inverter
2) ADC fault
Possible causes：The base voltage is over or low when AD of inverter converses.
solutions：Check the base voltage of inverter’s ADC and ADC conversion of DSP
3) Over voltage
Possible causes：Network power is not correct
Time of acceleration or deceleration is too short
When over voltage during deceleration, properly the load inertia is too big
solutions：check the main power voltage, check if the power switch turns on or off too
frequently
Adjust Acc/Dec time, increase the Acc/Dec time properly
Check the load, if necessary to install a brake resistance
4) Under voltage
Possible causes：ventilation channel is blocked
IPM works improperly
Environment temperature is too high
solutions：check if the voltage of main power is correct
Check the wiring of inline of inverter
5) Overheat
Possible causes：ventilation channel is blocked
IPM works improperly
Environment temperature is too high
solutions：clear the ventilation channel
6) Over Current
Possible causes：accelerating or decelerating time was set too short
Load is aberrant;
solutions：adjust accelerating or decelerating time, adjust PIparameters，check the load
7) Overload
Possible causes：load too heavy。
solutions：check the load, and reduce it
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