YASKAWA T1000A Technical Manual page 284

6.4 Fault Detection
Digital Operator Display
Cause
Surrounding temperature is too high.
Load is too heavy.
Internal cooling fan is stopped.
Digital Operator Display
Cause
Surrounding temperature is too high.
Load is too heavy.
Internal cooling fan is stopped.
Digital Operator Display
Cause
Motor has overheated
Digital Operator Display
Cause
Motor has overheated.
Digital Operator Display
Cause
Load is too heavy.
Cycle times are too short during acceleration and
deceleration.
A general purpose motor is driven below the rated speed
with too high load.
The output voltage is too high.
The wrong motor rated current is set to E2-01.
The base frequency is set incorrectly.
Multiple motors are running off the same drive.
The electrical thermal protection characteristics and
motor overload characteristics do not match.
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Heatsink Overheat
oH
The temperature of the heatsink exceeded the overheat pre-alarm level set to L8-02. Default value for L8-02 is determined by
drive capacity (o2-04).
• Check the temperature surrounding the drive. Verify temperature is within drive specifications.
• 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.
• Decrease the load.
• Lower the carrier frequency (C6-02).
• Replace the cooling fan.
• After replacing the drive, reset the cooling fan maintenance parameter (o4-03 = 0).
Overheat 1 (Heatsink Overheat)
oH1
The temperature of the heatsink exceeded the drive overheat level. The overheat level is determined by drive capacity (o2-04).
• 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.
• Replace the cooling fan.
• After replacing the drive, reset the cooling fan maintenance parameter (o4-03 = 0).
Motor Overheat Alarm (PTC Input)
oH3
• The motor overheat signal to analog input terminal A1, A2, or A3 exceeded the alarm detection level.
• Detection requires multi-function analog input H3-02, H3-06, or H3-10 be set to "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 too much, as 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 Overheat Fault (PTC Input)
oH4
• The motor overheat signal to analog input terminal A1, A2, or A3 exceeded the fault detection level.
• Detection requires that multi-function analog input H3-02, H3-06, 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 too much 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 electronic motor overload protection tripped.
Reduce the load.
Increase the acceleration and deceleration times (C1-01 through C1-08).
• Reduce the load.
• Increase the speed.
• If the motor is supposed to operate at low speeds, either increase the motor capacity or use a motor specifically designed to
operate in the desired speed range.
Adjust the user-set V/f patterns (E1-04 through E1-10). Parameters E1-08 and E1-10 may need to be reduced. Be careful not to
lower E1-08 and E1-10 too much because this reduces load tolerance at low speeds.
• 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).
Disable the motor protection function (L1-01 = 0) and install a thermal relay to each motor.
• Check the motor characteristics.
• Correct the type of motor protection that has been selected (L1-01).
• Install an external thermal relay.
Fault Name
Possible Solution
Refer to Cooling Fan Component Names on page
Fault Name
Possible Solution
Refer to Cooling Fan Component Names on page
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
320.
320.