Yaskawa L1000E AC Drive Technical Manual for CIMR-LE Models for Elevator Applications - Manual (Page 293)

6.4 Alarm Detection
YASKAWA ELECTRIC SIEP YAIL1E 01A YASKAWA AC Drive L1000E Technical Manual 293
T
ro
ubles
hoo
ting
6
Encoder cable is disconnected. Reconnect the cable.
Encoder cable wiring is wrong. Correct the wiring.
Noise interference along encoder wiring. Separate encoder wiring from the source of the noise (often output wiring from the drive).
Digital Operator Display Minor Fault Name
PASS MEMOBUS/Modbus Communication Test Mode Complete
Cause Possible Solutions
MEMOBUS/Modbus test has finished normally. This verifies that the test was successful.
Digital Operator Display Minor Fault Name
PGo
Encoder Disconnected (for Control Mode with Encoder)
Detected when no encoder signal is received for a time longer than setting in F1-14.
Cause Possible Solutions
Encoder cable is disconnected. Reconnect the cable.
Encoder cable wiring is wrong. Correct the wiring.
Encoder does not have enough power. Make sure the correct power supply is properly connected to the encoder.
Motor brake is not released. Ensure the brake releases properly
Digital Operator Display Minor Fault Name
PGoH
Encoder Disconnected (detected when using an encoder)
Encoder cable has become disconnected.
Cause Possible Solutions
Encoder cable is disconnected. Reconnect the cable.
Digital Operator Display Minor Fault Name
SE MEMOBUS/Modbus Self Test Failed
Cause Possible Solutions
A digital input set to 67H (MEMOBUS/Modbus
test) was closed while the drive was running.
Stop the drive and run the test again.
Digital Operator Display Minor Fault Name
TrPC
IGBT Maintenance Time (90%)
IGBTs have reached 90% of their expected performance life.
Note: This alarm will not trigger a multi-function output terminal that is set for alarm output (H2-†† = 10).
Cause Possible Solutions
IGBTs have reached 90% of their expected
performance life.
Replace the drive.
Digital Operator Display Minor Fault Name
UL3
Undertorque Detection 1
Drive output current (or torque in OLV, CLV, CLV/PM) less than L6-02 for longer than L6-03 time.
Cause Possible Solutions
Inappropriate parameter settings. Check parameters L6-02 and L6-03.
Load has dropped or decreased significantly. Check for broken parts in the transmission system.
Digital Operator Display Minor Fault Name
UL4
Undertorque Detection 2
Drive output current (or torque in OLV, CLV, CLV/PM) less than L6-05 for longer than L6-06 time.
Cause Possible Solutions
Inappropriate parameter settings. Check parameters L6-05 and L6-06.
The load has dropped or decreased significantly. Check for broken parts in the transmission system.
Digital Operator Display Minor Fault Name
Uv
Undervoltage
One of the following conditions was true when the drive was stopped and a Up/Down command was entered:
• DC bus voltage dropped below the level specified in L2-05.
• Contactor to suppress inrush current in the drive was opened.
• Low voltage in the control drive input power. This alarm outputs only if L2-01 is not 0 and DC bus voltage is under L2-05.
Cause Possible Solutions
Phase loss in the drive input power. Check for wiring errors in the main circuit drive input power. Correct the wiring.
Loose wiring in the drive input power terminals.
• Ensure the terminals have been properly tightened.
• Apply the tightening torque to the terminals as specified.
Refer to Wire Gauges and Tightening Torque on page 64 .
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.
Drive internal circuitry is worn.
• Check the maintenance time for the capacitors (U4-05).
• Replace either the control board or the entire drive if U4-05 exceeds 90%. For instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
The drive input power transformer is too small and
voltage drops when the power is switched on. • Check for an alarm when the magnetic contactor, line breaker, and leakage breaker are closed.
• Check the capacity of the drive input power transformer.
Air inside the drive is too hot. • Check the temperature inside the drive.