YASKAWA CR700, Техническое руководство, Страница: 356 / 886

6.4 Fault
356 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
Code Name Causes Possible Solutions
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] .
Note:
• The drive detects this fault if the heatsink temperature of the drive is more than the
oH1
detection level.
o2-04 [Drive Model (KVA) Selection]
determines the
oH1
detection
level.
• Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
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. • Examine the load level, acceleration/deceleration times, and
motor start/stop frequency (cycle time).
• Decrease the load.
• Increase the values set in
C1-01 to C1-08 [Acceleration/
Deceleration Time] .
• 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-xx [V/f Pattern for Motor 2]
settings. For motor 3,
adjust E7-xx [V/f Pattern for Motor 3] settings. Decrease the
values set in
Ex-08 [Mid Point A Voltage]
and
Ex-10
[Minimum Output Voltage] .
Note:
If Ex-08 and Ex-10 are set too low, the overload tolerance will
decrease at low speeds.
Note:
• The drive detects this fault if the motor overheat signal that was entered to an analog input terminals A1, A2, or A3 is more than the alarm detection level. (If H3-02, H3-10,
or H3-06 = E [MFAI Function Select = Motor Temperature (PTC Input)] was set.)
• Do a Fault Reset to clear the fault.
• If the drive detects this fault, it will operate the motor as specified by the Stopping Method set in L1-03 [Motor Thermistor oH Alarm Select] .
Code Name Causes Possible Solutions
oH4 Motor Overheat Fault (PTC Input)
The motor has overheated. • Examine the load level, acceleration/deceleration times, and
motor start/stop frequency (cycle time).
• Decrease the load.
• Increase the values set in C1-01 to C1-08 [Acceleration/
Deceleration Time] .
• 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-xx [V/f Pattern for Motor 2] settings. For motor 3,
adjust E7-xx [V/f Pattern for Motor 3] settings. Decrease the
values set in Ex-08 [Mid Point A Voltage] and Ex-10
[Minimum Output Voltage] .
Note:
If Ex-08 and Ex-10 are set too low, the overload tolerance will
decrease at low speeds.
Note:
• The drive detects this fault if the motor overheat signal that was entered to an analog input terminals A1, A2, or A3 is more than the fault detection level. (If H3-02, H3-10,
or H3-06 = E [MFAI Function Select = Motor Temperature (PTC Input)]
was set.)
• Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
oL1 Motor Overload The load is too heavy Decrease the load.
Note:
The value set in
U4-16 [Motor Overload Estimate(oL1)]
must
be less than 100 before oL1 can be reset.
The acceleration/deceleration time or cycle time is
too short.
• Examine the acceleration/deceleration times and the motor
start/stop frequency (cycle time).
• Increase the values set in C1-01 to C1-08 [Acceleration/
Deceleration Time] .