YASKAWA CIMR-JC4A0002BAA Quick Start Manual page 136

The option unit is not properly
connected to the drive.
LED Operator Display
oH1
Cause
Surrounding temperature is too
high.
Load is too heavy.
Current flowing to control circuit
terminal +V exceeded the tolerance
level.
LED Operator Display
oL1
Cause
Load is too heavy.
Cycle times are too short during
acceleration and deceleration.
• Drive overloaded at low speeds.
• Overload may occur at low
speeds when using a general-
purpose motor, even if
operating within the rated
current limitation.
Although a special type of motor is
being used, the motor protection
selection is set for a general-
purpose motor (L1-01 = 1).
Voltage is too high for the V/f
characteristics.
The wrong motor-rated current is
set to E2-01.
The motor base frequency for the
drive input power is set too low.
YASKAWA ELECTRIC TOEP C710606 26B YASKAWA AC Drive – J1000 Quick Start Guide
Turn the power off and reconnect the option unit.
Overheat 1 (Heatsink Overheat)
The temperature of the heatsink exceeded the overheat pre-alarm level.
• Check the temperature surrounding the drive.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool the surrounding area.
• Remove anything near the drive that might be producing excessive heat.
• Measure the output current.
• Lower the carrier frequency (C6-02).
• Reduce the load.
• Check the current level of the terminal.
• Set the current to the control circuit terminal to be 20 mA or less.
Motor Overload
The electrothermal sensor tripped overload protection.
Reduce the load.
Increase the acceleration and deceleration times (C1-01 through C1-04).
• Reduce the load.
• Increase the speed.
• If the drive is supposed to operate at low speeds, either increase the motor
capacity or use a motor specifically designed to operate with the drive.
Set L1-01 = "2".
• Adjust the user set V/f patterns (E1-04 through E1-10). Parameters E1-08 and
E1-10 may need to be reduced.
• If E1-08 and E1-10 are set too high, there may be very little load tolerance at
low speed.
• Check the motor-rated current.
• Enter the value written on the motor nameplate to parameter E2-01.
• Check the rated frequency indicated on the motor nameplate.
• Enter the rated frequency to E1-06 (Base Frequency).
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5.4 Fault Detection
Fault Name
Possible Solution
Fault Name
Possible Solution
5
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