Yatai Inverter YTB-S-LT User’s Manual
External Storage
Err4
Breakdown
OT
System Over
Temperature
Yarn broken
□
* Yarn has Broken
*Inspect whether or not the
yarn is broken
* Damage of the yarn probing
device
*Inspect whether or not the
Yarn Probing Device is
damaged
Motor not Rotation
*Wiring Error
*Inspect the power and control
lines
*Setting Error
*Load is too high
*Inspect the Parameter’s setting
*Increase the output capability
of the converter
Tripping Operation
of the Power
Supply
Too large the
circuit current
*Short Circuit on the input side
*Inspect the Input Lines
*Too low capability of the Air
Switch
*Inspect the capability of the
air switch
*Overload the Motor
*Decrease the load
7.2 Motor Faults and Its Corrective Measures
Table 7-2 Motor Faults and Its Corrective Measures
Fault
Inspection Item
Corrective Measures
Whether or not the power voltage
is normal?
Put on power supply; Inspect the
wiring
Whether or not the three phase
output is normal?
Cut off power supply and put on it
again
Motor not Rotation
Whether or not the motor is
blocked?
Decrease the load
Wiring of U
、
V
、
W is or isn’t
accurate?
Motor Rotation Direction Error
Correct the wiring
Decrease the load
Whether or not the load is over
?
Rotation of Motors is not stable
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