YASKAWA A1000 HHP Programming Manual page 208

2.5 Alarm Detection
Digital Operator Display
Cause
The DC bus soft charge relay has reached
90% of expected performance life.
Digital Operator Display
Cause
IGBTs have reached 50% of their expected
performance life.
Digital Operator Display
Cause
Surrounding temperature is too high
Internal cooling fan has stopped.
Airflow around the drive is restricted.
Digital Operator Display
Cause
An external device triggered an overheat
warning in the drive.
Digital Operator Display
Cause
Motor thermostat wiring is faulty (PTC
input).
There is a fault on the machine side (e.g.,
the machine is locked up).
208
Soft Charge Bypass Relay Maintenance Time
The DC bus soft charge relay is nearing the end of its expected performance life.
LT-3
Note: The signal closes when the maintenance period ends if H2-oo = 2F. The signal will not close
if H2-oo = 10.
Replace the drive.
IGBT Maintenance Time (50%)
IGBTs have reached 50% of their expected performance life.
LT-4
Note: The signal closes when the maintenance period ends if H2-oo = 2F. The signal will not close
if H2-oo = 10.
Check the load, carrier frequency, and output frequency.
Heatsink Overheat
oH
The temperature of the heatsink exceeded the overheat pre-alarm level set to L8-02 (90-100 °C). Default
value for L8-02 is determined by drive capacity (o2-04).
• Check the surrounding temperature.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool surrounding area.
• Remove anything near drive that may cause extra heat.
• Replace the cooling fan.
• After replacing the drive, set parameter o4-03 to 0 to reset the cooling fan operation time.
• Provide proper installation space around the drive.
• 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.
Heatsink Overheat Warning
oH2
"Heatsink Overheat Warning" was input to a multi-function input terminal, S1 through S8 (H1-oo= B).
Search for the device that tripped the overheat warning. Remove the cause of the problem.
Motor Overheat
oH3
The motor overheat signal entered to a multi-function analog input terminal exceeded the alarm level (H3-02,
H3-06 or H3-10 = E).
Repair the PTC input wiring.
• Check the status of the machine.
• Remove the cause of the fault.
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