
-312-
9 Troubleshooting
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E150.3: STO upstream optocoupler detection failure
Direct cause:
Short circuit occurs on the optocoupler of the upstream hardware circuit of STO.
Root Cause
Confirming Method
Solution
Short circuit occurs on the upstream
optocoupler of STO1 or STO2.
The servo drive does not display
E150.0 when the 24 V power supply is
powered off and on again.
Replace the servo drive.
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E150.4: PWM Buffer detection failure
Direct cause:
An errors occurs on the PWM Buffer chip during initialization detection upon power-on (the PWM signal
cannot be blocked).
Root Cause
Confirming Method
Solution
The Buffer fails to block the PWM
waves.
This fault persists after the servo
drive is powered off and on several
times.
Replace the servo drive.
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E201.0: Phase-P overcurrent
Direct cause:
High current flows through the positive pole of the DC-AC circuit.
Root Cause
Confirming Method
Solution
High current flows through the
positive pole of the DC-AC circuit.
Collect the current feedback using
the software tool to check whether
the current is abnormal.
◆
The motor parameters are set
improperly, adjust the motor
parameters.
◆
The current loop parameters are
set improperly, adjust the current
loop parameters.
◆
The speed loop parameters are
set improperly, adjust the speed
loop parameters.
◆
If the servo drive runs improperly,
replace it.
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E201.1: Phase-U overcurrent
Cause
Confirming Method
Solution
A current higher than the threshold
is collected in the phase-U current.
Check the phase-U current (H0B-38)
when the fault occurs.
◆
Check whether H01-38 is set
properly.
◆
Check whether the motor
parameters are set properly.
◆
Check whether the current loop
parameters are set properly.
◆
Check whether the servo drive
runs properly.