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) 235
Troubleshooting
5
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
Inappropriate parameter settings. Check parameters L6-02 and L6-03. YES
The load has dropped or decreased
significantly.
Check for broken parts in the transmission system such as
a belt or pulley.
YES
LED Operator Display Minor Fault Name
UL4
Undertorque Detection 2
Drive output current (or torque in OLV) was less than L6-05 for longer than
the time set in L6-06.
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
Inappropriate parameter settings. Check parameters L6-05 and L6-06. YES
The load has dropped or decreased
significantly.
Check for broken parts in the transmission system such as
a belt or pulley.
YES
LED Operator Display Minor Fault Name
Uv
Undervoltage
• One of the following conditions was true when the drive was stopped and a
run command was entered:
• DC bus voltage dropped below the level specified in L2-05.
• Contactor to suppress inrush current in the drive was open.
• Low voltage in the control drive input power.
This alarm is output only if L2-01 is not 0 and the DC bus voltage is under
L2-05.
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
Phase loss in the drive input power.
Check for wiring errors in the main circuit drive input
power. Correct the wiring.
YES
Loose wiring in the drive input
power terminals.
• Ensure the terminals have been properly tightened.
• Apply the tightening torque specified in this manual to
fasten the terminals. Refer to Wire Gauges and
Tightening Torque on page 69
YES
There is a problem with the drive
input power voltage.
• Check the voltage.
• Lower the voltage of the drive input power so that it is
within the limits listed in the specifications.
YES
- YES
Drive internal circuitry has become
worn.
• Check the maintenance time for the capacitors (U4-05).
• Replace the drive if U4-05 exceeds 90%.
YES
The drive input power transformer is
not large enough and voltage drops
when the power is switched on.
• Check for a tripped alarm when the magnetic contactor,
line breaker and leakage breaker are turned on.
• Check the capacity of the drive input power transformer.
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