YASKAWA CIPR-GA50C series, Technical Manual

Page: 253 / 766

T
roubleshooting
7
7.4 Faults
YASKAWA SIEPC71061753A GA500 Technical Manual 253
Code Name Causes Possible Solutions
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.
Note:
• When H3-02 or H3-10 = E [MFAI Function Select = Motor Temperature (PTC Input)] , the drive detects this fault if the motor overheat signal input from analog input
terminal A1 or A2 is more than the alarm detection level.
•
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.
•
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.
Note:
• The drive detects this fault if the motor overheat signal in analog input terminals A1, or A2 is more than the Fault detection level. (If H3-02, H3-10= E [Terminal A1/A2
Function Select = Motor Temperature (PTC Input)] .)
• Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
oL1 Motor Overload
The load is too large. 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.
The V/f pattern does not fit the motor qualities.
•
Examine the ratios between the V/f pattern frequency and
voltage. Decrease the voltage if it is too high compared to the
frequency.
• 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.
E1-06 [Base Frequency] is set incorrectly. Set E1-06 to the rated frequency shown on the motor nameplate.
One drive is operating more than one motor. Set L1-01 = 0 [Motor Overload (oL1) Protection = Disabled] ,
connect thermal overload relay to each motor to prevent damage
to the motor.
The electronic thermal protector qualities and the
motor overload properties do not match. • Examine the motor qualities and set L1-01 [Motor Overload
(oL1) Protection] correctly.
•
Connect a thermal overload relay to the motor.
The electronic thermal protector is operating at an
incorrect level. Set E2-01 [Motor Rated Current (FLA)] correctly to the value
specified by the motor nameplate.