YASKAWA CIPR-GA50UВ001AJ Series Installation & Primary Operation page 136

15 Troubleshooting
Code Name
PE1, PE2 PLC Faults
136
Causes
The speed search-related
parameters are set incorrectly
(this fault also occurs during
recovery from momentary
power loss and after Auto
Restarts).
The power supply voltage is too
high.
The braking resistor or braking
resistor unit wiring is incorrect.
Electrical interference caused a
drive malfunction.
The load inertia is set
incorrectly.
The Short Circuit Braking
function used in OLV/PM
control method.
There is motor hunting.
Speed search does not complete
at start when you set A1-02 = 8
[EZOLV] and use an induction
motor.
The communication option
detected a fault.
YASKAWA TOEPC7106170YB YASKAWA AC Drive GA500 Installation & Primary Operation
Possible Solutions
• Examine the settings for all speed
search related parameters.
• Set b3-19 ≠ 0 [Speed Search Restart
Attempts ≠ 0 times].
• Adjust b3-03 [Speed Search
Deceleration Time].
• Do Stationary Auto-Tuning for Line-
to-Line Resistance and then set b3-24
= 1 [Speed Search Method Selection
= Speed Estimation].
Decrease the power supply voltage to
match the drive rated voltage.
Correct wiring errors in the connection to
the braking resistor or braking resistor
unit.
• Examine the control circuit lines,
main circuit lines, and ground wiring,
and decrease the effects of electrical
interference.
• Make sure that a magnetic contactor
is not the source of the electrical
interference, then use a Surge
Protective Device if necessary.
• Examine the load inertia settings with
KEB, overvoltage suppression, or
stall prevention during deceleration.
• Adjust L3-25 [Load Inertia Ratio] to
match the qualities of the machine.
Connect a braking resistor to the drive.
• Adjust n1-02 [Hunting Prevention
Gain Setting].
• Adjust n2-02 [Automatic Freq
Regulator Time 1] and n2-03
[Automatic Freq Regulator Time 2].
• Adjust n8-45 [Speed Feedback
Detection Gain] and n8-47 [Pull-in
Current Comp Filter Time].
When E9-01 = 0 [Motor Type Selection
= Induction (IM)], set b3-24 = 2 [Speed
Search Method Selection = Current
Detection Speed Search].
Refer to the manual for the
communication option card.