Fault Analysis - Sanken SAMCO-NS Series Instruction Manual

Fault Analysis

Problem
Main circuit
Load side
Motor does not rotate
Operator panel
Input signal
Rotation direction
reversed what it should
be.
Rotation speed does
not increase
Rotation is not stability
Unstability during
acceleration/deceleration
Motor heating up
Rotation speed changed
abnormally during
operation
No display on the surface of
operator panel
Check points
Voltage at input termianls R、S、T are normal?
Whether is the motor wired correctly?
Load too heavy?
Motor locked?
Starting frequency setting too high (F1103)?
Operation start frequency (F1104) setting too high?
Operation command selected for control by external signal (F1102=2)?
Upper frequency limit set too low (F1007）?
nd
2 upper frequency limit(F1316)and 3
by multi-function input signal are setting too low?
Checking whether is no setting for the direction of rotationof motor (F1109)
Whether operation signals（FR、RR）is input？
FR and RR signals are input simultaneously?
Idle run stop signal (MBS)?
Analog frequency for frequency setting is zero?
Wrong wiring of output U、V、W terminals?
Wrong wiring of forward 、reverse?
Upper frequency limit (F1007) activated?
Output current limiting function activated?
F1701 setting too low?
Torque increased is too high (F1004)?
Load too heavy?
Load fluctuating?
Frequency setting (analog) signal fluctuating?
Whether is correct setting for the capacity of Inverter ; number of poles
and capacity of motor under senslorless speed control mode?
Setting time for accleration/deceleration too short?
Output current limiting function activated?
Load too heavy?
Wrong setting for V/f Mode?
Torque compensation too hight?
Whether is the load fluctuating?
Output current limiting function activated
F1701 setting too low?
Voltage at R、S、T terminal are normal?
Whether the connection between Inverter and operation panel is the standard
-73-
rd
upper frequency limit selected