Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 64)

Chapter 4: Troubleshooting PC NC Maintenance Manual
4-43
An error number of AL-80 ~ AL-9F is displayed only by the host NC unit.
They are not displayed in a digital operator of VS-626M5.
Table 4.18: Alarm Descriptions
Number Name Content
Fault
Code
Rank
AL-01 Overcurrent Output current flowed more than the overcurrent
detection value or the inverter output (load) was
short-circuit. 0000 A
AL-02 Ground fault Ground fault current in the inverter output side
exceeded the ground fault detection level. 0000 A
AL-04 Main circuit fuse open
circuit The DC circuit fuse fused. 0000 A
AL-05 Inverter output overload Output current flowed more than 120% /min. at 30
min. rating.
0000 A
AL-10 Converter error An error occurred in the converter unit. 0001 A
AL-11 Main circuit overvoltage Main circuit DC voltage exceeded the overvoltage
setting value.
0001 A
AL-12 Main circuit low voltage Main circuit DC voltage went below the low voltage
detection level while driving.
0001 A
AL-13 Control circuit low volt-
age Control circuit power supply went below the low
voltage detection level. 0001 A
AL-20 Wiring switch over drive
defect Wiring switch over drive did not complete in setting
time or less. 0010 A
AL-21 Emergency stop drive
defect
Did not stop within ten seconds after the specified
the emergency stop. 0010 A
AL-30 Encoder signal discon-
nection Motor encoder signal conductor disconnection/
improper connection. 0011 A
AL-31 Overspeed of motor Motor speed exceeded 120% of setting rated
speed. 0011 A
AL-32 Speed over-deviation Speed became 50% or less of the command value. 0011 A
AL-33 Load error Inverter output opening (speed feedback is 0.) 0011 A
AL-40 Motor overheat (minor
fault) Motor temperature exceeded the upper limit. 0100 B
AL-41 Motor overheating 2 Motor temperature exceeded the upper limit for
one minute or more. 0100 A
AL-42 Motor thermistor discon-
nection
Thermistor for the motor temperature detection
was disconnected. 0100 A
AL-43 Heat sink overheating
(minor fault) Heat sink temperature exceeded the upper limit. 0100 B
AL-44 Heat sink overheating 2 Heat sink temperature exceeded the upper limit for
one minute or more.
0100 A
AL-45 Heat sink thermistor dis-
connection Thermistor for the heat sink temperature detection
was disconnected. 0100 A