STEP
i
AStar
Frequency Inverter For Elevator Door Machine manual Instructions
63
8.2 solutions
Fault identification and treatment
:
1) I
PM fault
Possible causes: inverter over current
Inverter fault
Solutions: check load of door machine
Change inverter
2) A
DC 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) O
ver 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) U
nder 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) O
verheat
Possible causes
:
ventilation channel is blocked
IPM works improperly
Environment temperature is too high
solutions
:
clear the ventilation channel
6) O
ver 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) O
verload
Possible causes
:
load too heavy
。
solutions
:
check the load, and reduce it