YASKAWA V1000 Series Installation & Start-Up Manual

5.6 Alarm Detection
YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07) 233
Troubleshooting
5
LED Operator Display Minor Fault Name
oS
Overspeed (for Simple V/f with PG)
Pulse input (RP) indicates that the motor speed feedback exceeded the setting
in F1-08.
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
Overshoot or undershoot is
occurring.
• Adjust the gain by using the pulse train input parameters
(H6-02 through H6-05).
Adjust the speed feedback accuracy.
• Increase the settings for C5-01 (Speed Control
Proportional Gain 1) and reduce C5-02 (Speed Control
Integral Time 1).
YES
PG pulse settings are incorrect.
Set the H6-02 (Pulse Train Input Scaling) = 100%, the
number of pulses during maximum motor revolutions.
YES
Parameter settings are inappropriate.
Check the setting for the overspeed detection level and the
overspeed detection time (F1-08 and F1-09).
YES
LED Operator Display Minor Fault Name
ov
DC Bus Overvoltage
The DC bus voltage exceeded the trip point.
For 200 V class: approximately 410 V
For 400 V class: approximately 820 V (740 V when E1-01 < 400)
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
Surge voltage is present in the drive
input power.
• Install a DC reactor or an AC reactor.
• Voltage surge can result from a thyristor convertor and a
phase advancing capacitor operating on the same drive
input power system.
YES
• The motor has short-circuited.
• Ground current has over-charged
the main circuit capacitors via the
drive input power.
• Check the motor power cable, relay terminals and motor
terminal box for short circuits.
• Correct grounding shorts and turn the power back on.
YES
Noise interference causes the drive to
operate incorrectly.
• Review the possible solutions provided for handling noise
interference.
• Review the section on handling noise interference and
check the control circuit lines, main circuit lines and
ground wiring.
• If the magnetic contactor is identified as a source of noise,
install a surge protector to the MC coil.
YES
Set the number of fault restarts (L5-01) to a value other
than 0.
YES

YASKAWA V1000 Series Specifications

General

Model	V1000 Series
Series	V1000
Output Frequency	0.1 to 400 Hz
Overload Capacity	150% for 60 seconds
Type	AC Drive
Control Method	V/f Control
Input Voltage	200-240V, 380-480V
Output Voltage	0 to Input Voltage
Power Range	0.1 to 18.5 kW
Horsepower	0.2 to 25 HP
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheating, Short Circuit, Ground Fault
Communication Interfaces	Modbus RTU
Enclosure	IP20
Ambient Temperature	-10 to +50°C
Storage Temperature	-20 to +60°C
Humidity	5 to 95% RH (non-condensing)
Cooling Method	Fan Cooled