144
YASKAWA
TOEPC71061737D GA800 DRIVE INSTALLATION & PRIMARY OPERATION
Code
Name
Causes
Possible Solutions
oH
Heatsink Overheat
The ambient temperature is high and the heatsink
temperature of the drive is more than the value set in
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.
The load is too heavy.
•
Measure the output current.
•
Decrease the load.
•
Decrease the value set in
C6-02 [Carrier Frequency Selection]
.
The internal cooling fan of the drive stopped.
1.
Use the procedures in this manual to replace the cooling fan.
2.
Set
o4-03 = 0 [Fan Operation Time Setting = 0 h]
.
oH1
Heatsink Overheat
The ambient temperature is high and the heatsink
temperature of the drive is more than the
oH1
detection 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.
The load is too heavy.
•
Measure the output current.
•
Decrease the load.
•
Decrease the value set in
C6-02 [Carrier Frequency Selection]
.
oH3
Motor Overheat (PTC Input)
The thermistor wiring that detects motor temperature
is defective.
Correct wiring errors.
A fault occurred on the machine.
Example: The machine is locked.
Examine the machine and remove the cause of the fault
The motor has overheated.
•
Check the load level, acceleration/deceleration time, and motor
start/stop frequency (cycle time).
•
Decrease the load.
•
Increase the values set in
C1-01 to C1-08 [Acceleration/
Deceleration Times]
.
•
Set
E2-01 [Motor Rated Current (FLA)]
correctly to the value
specified by the motor nameplate.
•
Make sure that the motor cooling system is operating correctly,
and repair or replace it if it is damaged.
•
Adjust
E1-04 to E1-10 [V/f Pattern Parameters]
. For motor 2,
adjust
E3-04 to E3-10
. Decrease the values set in
E1-08 [Mid
Point A Voltage]
and
E1-10 [Minimum Output Voltage]
.
Note:
If the values set in
E1-08
and
E1-10
are too low, the overload
tolerance will decrease at low speeds.
oH4
Motor Overheat Fault (PTC Input)
The motor has overheated.
•
Check the load level, acceleration/deceleration time, and motor
start/stop frequency (cycle time).
•
Decrease the load.
•
Increase the values set in
C1-01 to C1-08 [Acceleration/
Deceleration Times]
.
•
Set
E2-01 [Motor Rated Current (FLA)]
correctly to the value
specified by the motor nameplate.
•
Make sure that the motor cooling system is operating correctly,
and repair or replace it if it is damaged.
•
Adjust
E1-04 to E1-10 [V/f Pattern Parameters]
. For motor 2,
adjust
E3-04 to E3-10
. Decrease the values set in
E1-08 [Mid
Point A Voltage]
and
E1-10 [Minimum Output Voltage]
.
Note:
If the values set in
E1-08
and
E1-10
are too low, the overload
tolerance will decrease at low speeds.
oL1
Motor Overload
The load is too heavy.
Decrease the load.
Note:
Reset
oL1
when
U4-16 [Motor oL1 Level]
< 100.
The acceleration/deceleration times or cycle times are
too short.
•
Examine the acceleration/deceleration times and the motor start/
stop frequencies (cycle times).
•
Increase the values set in
C1-01 to C1-08 [Acceleration/
Deceleration Times]
.
Overload occurred while running at low speed.
•
Decrease the load when running at low speed.
•
Increase the motor speed.
•
If the motor is run frequently at low speeds, replace the motor
with a larger motor or use a drive-dedicated motor.
Note:
For general-purpose motors, overload can occur while running
at low speed when operating at below the rated current.
L1-01 [Motor Overload (oL1) Protection]
is set
incorrectly.
Set
L1-01
in as specified by the motor qualities for a drive-dedicated
motor.