Omron Q2V Series, Техническое руководство

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T
roubleshooting
7
7.4 Faults
SIEPCYEUOQ2V01A Q2V Technical Manual 231
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 [Mot 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
A Voltage] and E1-10 [Min 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= 16 [AI1/AI2 Function
Select = Mot 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 [MotorOLEstimate (oL1)] < 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 Cool Type for OL1 Calc] 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
A Voltage] and E1-10 [Min 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 Cool Type for OL1 Calc = 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 Cool Type
for OL1 Calc] correctly.
• Connect a thermal overload relay to the motor.
The electronic thermal protector is operating at an
incorrect level. Set E2-01 [Mot Rated Current (FLA)] correctly to the value
specified by the motor nameplate.
There is increased motor loss from overexcitation
operation. • Lower the value set in n3-13 [OverExcBr Gain] .
• Set L3-50 ≠ 3 or 4 [StallP@Decel Mode ≠ HiFlux
Overexcitation or HiFlux2 Overexcitation] .
• Set L3-04 = 0 [StallP@Decel Enable = Disabled] .
The speed search-related parameters are set
incorrectly.
•
Examine the settings for all speed search related parameters.
•
Adjust b3-03 [SpSrch Deceleration Time] .
•
Set b3-24 = 1 [SpSrch Method Selection = Speed Estimation]
after Auto-Tuning.
Phase loss in the input power supply is causing the
output current to change. Make sure that there is no phase loss, and repair problems.
The motor main circuit cable is too long. • Replace the drive with a larger capacity model.
• Decrease C6-02 [Carrier Frequency Selection] . Or set C6-02
= B .
Note:
• The drive detects this fault if the electronic thermal protector of the drive started the motor overload protection.
•
Do a Fault Reset to clear the fault.
•
L5-07 [OL1-4 Auto-Reset Select] disables the Auto Restart function.