YASKAWA GA700 Technical Manual page 303

Code Name
LT-1 Cooling Fan Maintenance
Time
Note:
When the estimated performance life of the cooling fan has elapsed, H2-xx = 2F [MFDO Function Select = Maintenance Period] will
be ON.
Code Name
LT-2 Capacitor Maintenance
Time
Note:
When the estimated performance life of the cooling fan has elapsed, H2-xx = 2F [MFDO Function Select = Maintenance Period] will
be ON.
Code Name
LT-3 SoftChargeBypassRelay
MainteTime
Note:
When the estimated performance life of the cooling fan has elapsed, H2-xx = 2F [MFDO Function Select = Maintenance Period] will
be ON.
Code Name
LT-4 IGBT Maintenance Time
(50%)
Note:
When the estimated performance life of the cooling fan has elapsed, H2-xx = 2F [MFDO Function Select = Maintenance Period] will
be ON.
Code Name
oH Overheat 1 (Heatsink
Overheat)
Note:
• Detected if the heatsink temperature of the drive exceeds the level set in L8-02 [Overheat Alarm Level].
• If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
• If detected, the drive will operate the motor according to the stop method set in L8-03 [Overheat Pre-Alarm Ope Selection].
Code Name
oH2 Drive Overheat Warning
Note:
If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Cause
The cooling fan has reached 90% of its
expected performance life.
Cause
The main circuit and control circuit
capacitors has reached 90% of their
expected performance life.
Cause
The inrush current prevention relay has
reached 90% of its expected
performance life.
Cause
IGBTs have reached 50% of their
expected performance life.
Cause
The ambient temperature is too high.
Airflow around the drive is restricted.
Internal cooling fan has stopped.
Cause
oH2 [Drive Overheat Warning] signal
was input from an external device.
6.5 Minor Faults/Alarms
Possible Solution
1. Follow the description in this manual to replace
cooling fan.
2. Set o4-03 = 0 [CoolingFan OperationTime
Setting = 0 h] to reset the cooling fan operation
time.
Possible Solution
Replace the board or the entire drive. For
instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
Possible Solution
Replace the board or the entire drive. For
instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
Possible Solution
Check the load, carrier frequency, and output
frequency.
Possible Solution
• Check the ambient temperature.
• Improve the ventilation within the control panel.
• Install a cooling device (cooling fan or air
conditioner) to lower the ambient temperature.
• Remove anything near the drive that might be
producing excessive heat.
• Provide proper installation space around the
drive as indicated in the manual.
• Allow for the proper space and ensure that there
is sufficient circulation around the control panel.
• Check for dust or other foreign materials
clogging the cooling fan.
• Clear debris caught in the fan that restricts air
circulation.
1. Follow the description in this manual to replace
cooling fan.
2. Set o4-03 = 0 [CoolingFan OperationTime
Setting = 0 h].
Possible Solution
1. Identify the external device that output the
overheat alarm and take measures to address
the problem.
2. Clear the Drive Overheat Alarm (oH2) [H1-xx
= B] which has been set to multi-function
digital input terminals S1 to S8.
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