Braking function is being used in PM Open
Loop Vector Control.
Connect a braking resistor.
Motor hunting occurs.
• Adjust the parameters that control hunting.
• Set the hunting prevention gain (n1-02).
• Adjust the AFR time constant (n2-02 and n2-03) when in OLV Control.
• Use parameters n8-45 (PM Speed Feedback Detection Suppression Gain)
and n8-47 (Pull-In Current Compensation Time Constant).
LED Operator Display
Fault Name
PF
Input Phase Loss
Drive input power has an open phase or has a large imbalance of voltage between phases. Detected
when L8-05 = 1 (enabled).
Cause
Possible Solution
There is phase loss in the drive input power. • Check for wiring errors in the main circuit drive input power.
• Correct the wiring.
There is loose wiring in the drive input power
terminals.
• Ensure the terminals are tightened properly.
• Apply the tightening torque specified in this manual to fasten the terminals.
Refer to Wire Gauges
and Tightening Torque on page 46
There is excessive fluctuation in the drive
input power voltage.
• Check the voltage from the drive input power.
• Review the possible solutions for stabilizing the drive input power.
• Disable Input Phase Loss Detection (L8-05 = “0”). PF is detected if DC bus ripple is too high. If it
is disabled, there is no fault but the ripple is still too high, thereby the capacitors are stressed more
and lose lifetime.
There is poor balance between voltage
phases.
• Stabilize drive input power or disable phase loss detection.
The main circuit capacitors are worn.
• Check the maintenance time for the capacitors (U4-05).
• Replace the drive if U4-05 is greater than 90%.
• Check for anything wrong with the drive input power.
• If nothing is wrong with the drive input power, try the following solutions if the alarm continues:
• Disable Input Phase Loss Protection selection (L8-05 = “0”). PF is detected if DC bus ripple is too
high. If it is disabled, there is no fault but the ripple is still too high, thereby the capacitors are stressed
more and lose lifetime.
• Replace the drive.
LED Operator Display
Fault Name
PGo
PG Disconnect (for Simple V/f with PG)
No PG pulses are received for longer than the time set to F1-14.
Cause
Possible Solution
Pulse input (RP) is disconnected.
Reconnect the pulse input (RP).
Pulse input (RP) wiring is wrong.
Correct the wiring.
Motor brake engaged.
Ensure the motor brake releases properly.
LED Operator Display
Fault Name
rH
Braking Resistor Overheat
Braking resistor protection was triggered.
Fault detection is enabled when L8-01 = 1 (disabled as a default).
Cause
Possible Solution
Deceleration time is too short and excessive
regenerative energy is flowing back into the
drive.
• Check the load, deceleration time and speed.
• Reduce the load.
• Increase the acceleration and deceleration times (C1-01 through C1-08).
• Replace the braking option with a larger device that can handle the power that is discharged.
Excessive braking inertia.
Recalculate braking load and braking power. Then try reducing the braking load and checking the
braking resistor settings and improve braking capacity.
The proper braking resistor has not been
installed.
• Check the specifications and conditions for the braking resistor device.
• Select the optimal braking resistor.
Note:
The magnitude of the braking load trips the braking resistor overheat alarm, NOT the surface temperature. Using the braking resistor more
frequently than its rating trips the alarm even when the braking resistor surface is not very hot.
LED Operator Display
Fault Name
rr
Dynamic Braking Transistor
The built-in dynamic braking transistor failed.
Cause
Possible Solution
The braking transistor is damaged.
• Cycle power to the drive and check if the fault reoccurs.
Refer to Diagnosing and Resetting
Faults on page 252
.
• Replace the drive if the fault continues.
The control circuit is damaged.
LED Operator Display
Fault Name
SEr
Too Many Speed Search Restarts
The number of speed search restarts exceeded the number set to b3-19.
Cause
Possible Solution
Speed Search parameters are set to the wrong
values.
• Reduce the detection compensation gain during Speed Search (b3-10).
• Increase the current level when attempting Speed Search (b3-17).
• Increase the detection time during Speed Search (b3-18).
• Repeat Auto-Tuning.
The motor is coasting in the opposite
direction of the run command.
Enable Bi-directional Speed Search (b3-14 = “1”).
6.4 Fault Detection
238
SIEP C710606 20 OYMC AC Drive - V1000 User Manual
7/16/2008-13:23
Содержание V1000
Страница 11: ...Table of Contents This Page Intentionally Blank 10 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 27: ...1 4 Component Names This Page Intentionally Blank 26 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 37: ...2 2 Mechanical Installation This Page Intentionally Blank 36 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 63: ...3 12 Wiring Checklist This Page Intentionally Blank 62 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 221: ...5 11 U Monitor Parameters This Page Intentionally Blank 220 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 273: ...7 5 Drive Replacement This Page Intentionally Blank 272 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 287: ...8 6 Connecting an Option Card This Page Intentionally Blank 286 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 297: ...A 6 Drive Derating Data This Page Intentionally Blank 296 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 379: ...C 13 Self Diagnostics This Page Intentionally Blank 378 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 409: ...Index This Page Intentionally Blank 408 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
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