Digital Operator Display Minor Fault Name
PASS MEMOBUS/Modbus Comm. Test Mode Complete
Cause Possible Solutions
MEMOBUS/Modbus test has finished
normally.
This verifies that the test was successful.
PGo
PG Disconnect (for Control Mode with PG)
Detected when no PG pulses are received for a time longer than setting in F1-14.
PGoH
PG Hardware Fault (detected when using a PG-X3 option card)
PG cable has become disconnected.
rUn
Motor Switch during Run
A command to switch motors was entered during run.
Digital Operator Display Minor Fault Name
SE
MEMOBUS/Modbus Communication Test Mode Error
Note: This alarm will not trigger a multi-function output terminal that is set for alarm output
(H2-oo = 10).
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.
<1>
THo
Thermistor Disconnect
The thermistor used to detect motor temperature has become disconnected.
<1> Detected in models 4A0930 and 4A1200.
Digital Operator Display Minor Fault Name
TrPC
IGBT Maintenance Time (90%)
IGBTs have reached 90% of their expected performance life.
Cause Possible Solutions
IGBTs have reached 90% of their expected
performance life.
Replace the drive.
UL3
Undertorque Detection 1
Drive output current (or torque in OLV, CLV, AOLV/PM, and CLV/PM) less than L6-02 for longer than
L6-03 time.
UL4
Undertorque Detection 2
Drive output current (or torque in OLV, CLV, AOLV/PM, and CLV/PM) less than L6-05 for longer than
L6-06 time.
5.3 Alarm Detection
YASKAWA ELECTRIC TOEP C710616 41G YASKAWA AC Drive - A1000 Quick Start Guide
201
5
Troubleshooting
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