Yatai Inverter YTB-S-LT User’s Manual
7. Recovery Processing and Routine Maintenance
In the actual use of the converter, due to be reflected by environment and working condition, it is possible to
take place some error protection and abnormal phenomena. This chapter has given the processing method of
some common faults.
7.1 Abnormal Information and its Treatment
This machine is provided with the protection functions of over current, over voltage and overload. Once the
fault occurred, the converter immediately stops its output and displays the corresponding fault type. Table 7-1
lists the common faults and their simple measures to deal with.
Table 7-1
Common Faults Phenomena and Their Measures to Deal with
Fault Display
Illustration
Cause
Measures to Deal With
Over Current
OC(Winding)
*Too short Increase Time
* Increase the acceleration time
OC1
(Extra-feeding)
*Short Circuit on the output side
*Whether the motor cable is
* Motor blocked
damaged.
* VF Compensation improper
*Examine whether or not the
motor is overload.
*Decrease the V/F
compensation value
OE
DC Over voltage
* Too high the Power Voltage
*Check whether or not input
the rating voltage
*Too large the Load Inertia
* Too short the speed decrease
time
*Increase the speed decrease
time
OL
Overload
*Too high the Load
*Decrease the Load
*Augment the converter
Err1
Input Error
*Setting Parameters without
breaking open the password
*Re-input the accurate
password
Err2
Without Pulse
Signal
* Without the Hall Signal
*Inspect the connecting line of
Hall Element
* Pressure Roller without contact
well
* Inspect whether or not the
pressure roller is contacted well
Err3
Communication
Breakdown
