YASKAWA A1000 HHP Programming Manual page 210

2.5 Alarm Detection
Digital Operator Display
Cause
Surge voltage present in the drive input
power.
The motor is short-circuited.
Ground current has overcharged the main
circuit capacitors via the drive input power.
Noise interference causes the drive to
operate incorrectly.
PG cable is disconnected.
PG cable wiring is wrong.
Noise interference along PG encoder
wiring.
Digital Operator Display
PASS
Cause
MEMOBUS/Modbus test has finished
normally.
Digital Operator Display
Cause
PG cable is disconnected.
PG cable wiring is wrong.
PG encoder does not have enough power. Make sure the correct power supply is properly connected to the PG encoder.
Brake is holding the PG.
Digital Operator Display
PGoH
Cause
PG cable is disconnected.
Digital Operator Display
Cause
A motor switch command was entered
during run.
210
DC Bus Overvoltage
The DC bus voltage exceeded the trip point.
ov
• For 400 V class drives: approximately 820 V (740 V when E1-01 is less than 400)
• For 575 V class drives: approximately 1040 V
• For 690 V class drives: approximately 1200 V
• Install a DC link choke 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.
• Check the motor power cable, relay terminals and motor terminal box for short circuits.
• Correct grounding shorts and turn the power back on.
• Review possible solutions for handling noise interference.
• Review section on handling noise interference and check 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.
Set number of fault restarts (L5-01) to a value other than 0.
Reconnect the cable.
Correct the wiring.
Separate PG wiring from the source of the noise (often output wiring from the drive).
MEMOBUS/Modbus Comm. Test Mode Complete
This verifies that the test was successful.
PG Disconnect (for Control Mode with PG)
PGo
Detected when no PG pulses are received for a time longer than setting in F1-14.
Reconnect the cable.
Correct the wiring.
Ensure the brake releases properly
PG Hardware Fault (detected when using a PG-X3 option card)
PG cable has become disconnected.
Reconnect the cable and check the setting of F1-20.
Motor Switch during Run
rUn
A command to switch motors was entered during run.
Change the operation pattern so that the motor switch command is entered while the drive is stopped.
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions