YASKAWA CR700

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6.5 Minor Faults/Alarms

368 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual

Code Name Causes Possible Solutions

The drive is trying to operate a specialized motor or

a motor that is larger than the maximum applicable

motor output of the drive.

• Examine the motor nameplate and reevaluate the motor and

drive to make sure that the drive rated current is larger than the

motor rated current.

• Replace the drive with a larger capacity model.

Note:

• The drive detects this error if the drive output current is more than the overcurrent alarm level (150% of the rated current).

• If the drive detects this error, the terminal assigned to H2-01 to H2-05 = 10 [MFDO Function Select = Alarm] will be ON.

Code Name Causes Possible Solutions

L24v Loss of External Power 24 Supply

The voltage of the backup 24 V power supply has

decreased. The main circuit power supply is

operating correctly.

• Examine the external 24 V power supply for disconnected

wires and wiring errors and repair the problems.

• Examine the external 24 V power supply for problems.

Note:

• Set o2-23 [External 24V Powerloss Detection] to enable or disable L24v detection.

• The drive will not output an alarm signal for this alarm.

Code Name Causes Possible Solutions

LoG Log Com Error

There is not a micro SD in the keypad. Put a micro SD card in the keypad.

• USB connected

• The number of log communication files is more

than 1000.

• The capacity of the micro SD card has been

exceeded.

• The line number data in a log communication

file is incorrect.

• A communication error between the keypad and

drive occurred during a log communication.

Set o5-01 = 0 [Log Start/Stop Selection = OFF].

Note:

If the drive detects this error, the terminal assigned to H2-01 to H2-05 = 6A [MFDO Function Select = Data Logger Error] will be ON.

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.

Note:

When the estimated performance life is expired, the terminal assigned to H2-01 to H2-05 = 2F [MFDO Function Select = Maintenance Notification] will be ON.

Code Name Causes Possible Solutions

LT-2 Capacitor Maintenance Time

The capacitors for the main circuit and control

circuit are at 90% of expected performance life.

Replace the control board or the drive. For information about

replacing the control board, contact Yaskawa or your nearest sales

representative.

Note:

When the estimated performance life is expired, the terminal assigned to H2-01 to H2-05 = 2F [MFDO Function Select = Maintenance Notification] will be ON.

Code Name Causes Possible Solutions

LT-3

SoftChargeBypassRelay

MainteTime

The soft charge bypass relay is at 90% of its

expected performance life.

Replace the control board or the drive. For information about

replacing the control board, contact Yaskawa or your nearest sales

representative.

Note:

When the estimated performance life is expired, the terminal assigned to H2-01 to H2-05 = 2F [MFDO Function Select = Maintenance Notification] will be ON.

Code Name Causes Possible Solutions

LT-4 IGBT Maintenance Time (50%)

The IGBT is at 50% of its expected performance

life.

Check the load, carrier frequency, and output frequency.

Note:

When the estimated performance life is expired, the terminal assigned to H2-01 to H2-05 = 2F [MFDO Function Select = Maintenance Notification] will be ON.

Code Name Causes Possible Solutions

oH Heatsink Overheat

The ambient temperature is high and the heatsink

temperature is more than L8-02 [Overheat Alarm

Level].

• Measure the ambient temperature.

• Increase the airflow in the control panel.

• 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.