YASKAWA
TOEPC7106170YB YASKAWA AC Drive GA500 Installation & Primary Operation
149
Code
Name
Causes
Possible Solutions
LT-1
Cooling Fan
Maintenance Time
The cooling fan is at 90% of its
expected performance life.
1.
Use the procedures in this manual to
replace the cooling fan.
2.
Set
o4-03 = 0 [Fan Operation Time
Setting = 0 h]
to reset the cooling
fan operation time.
LT-2
Capacitor
Maintenance Time
The capacitors for the main
circuit and control circuit are at
90% of expected performance
life.
Replace the board or the drive. For
information about replacing the control
board, contact Yaskawa or your nearest
sales representative.
LT-3
SoftChargeBypassRe
lay MainteTime
The soft charge bypass relay is
at 90% of its expected
performance life.
Replace the board or the drive. For
information about replacing the control
board, contact Yaskawa or your nearest
sales representative.
LT-4
IGBT Maintenance
Time (50%)
The IGBT is at 50% of its
expected performance life.
Check the load, carrier frequency, and
output frequency.
oH
Heatsink Overheat
The ambient temperature is high
and the heatsink temperature is
more than the
L8-02 [Overheat
Alarm Level]
.
•
Measure the ambient temperature.
•
Increase the airflow around the drive.
•
Install a cooling device (cooling fan
or air conditioner) to lower the
ambient temperature.
•
Remove objects near the drive that are
producing too much heat.
There is not sufficient airflow
around the drive.
•
Give the drive the correct installation
space as shown in the manual.
•
Make sure that there is sufficient
circulation around the control panel.
•
Examine the drive for dust or other
unwanted materials that could clog
the cooling fan.
•
Remove unwanted materials that
prevent air circulation.
The internal cooling fan or fans
have stopped.
1.
Use the procedures in this manual to
replace the cooling fan.
2.
Set
o4-03 = 0 [Fan Operation Time
Setting = 0 h]
.
oH2
External Overheat
(H1-XX=B)
An external device sent an
oH2
.
1.
Find the external device that output
the overheat alarm.
2.
Remove the cause of the problem.
3.
Clear the
Overheat Alarm (oH2)
[H1-xx = B]
set to MFDI terminals
S1 to S7.
oH3
Motor Overheat (PTC
Input)
The thermistor wiring that
detects motor temperature is
defective.
Correct wiring errors.