YASKAWA V1000 Quick Start Manual page 90

5.2 Fault Detection
The internal cooling fan has reached
its performance life or has
malfunctioned.
Current flowing to control circuit
terminal +V exceeded the tolerance
level.
Cause
Motor has overheated.
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.
90
• Check the maintenance time for the cooling fan (U4-04).
• If U4-04 exceeds 90%, replace the cooling fan. .
• After replacing fan, reset the fan maintenance time (o4-03 = "0").
• Check tCheck the current level of the terminal.
• Set the current to the control circuit terminal to be 20 mA or less.
Motor Overheat Alarm (PTC Input)
• The motor overheat signal to analog input terminal A1 or A2 exceeded the
oH3
alarm detection level.
• Detection requires multi-function analog input H3-02 or H3-10 be set to "E".
Motor Overheat Fault (PTC Input)
• The motor overheat signal to analog input terminal A1 or A2 exceeded the
oH4
alarm detection level.
• Detection requires that multi-function analog input H3-02 or H3-10 = "E".
• Check the size of the load, the accel/decel times and the cycle times.
• Decrease the load.
• Increase the acceleration and deceleration times (C1-01 through C1-08).
• Adjust the preset V/f pattern (E1-04 through E1-10). This will mainly involve
reducing E1-08 and E1-10.Be careful not to lower E1-08 and E1-10
excessively because this reduces load tolerance at low speeds
• Check the motor-rated current.
• Enter the motor-rated current as indicated on the motor nameplate (E2-01).
• Ensure the motor cooling system is operating normally.
• Repair or replace the motor cooling system.
Motor Overload
oL1
The electrothermal sensor tripped overload protection.
Reduce the load.
Increase the acceleration and deceleration times (C1-01 through C1-08).
• 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.
YASKAWA ELECTRIC TOEP C710606 14A YASKAWA AC Drive - V1000 Quick Start Guide
Possible Solution
Possible Solution