YASKAWA FSDrive-MV1000 Instructions Manual page 134

5.5 Alarm Detection
Digital Operator Display
oH
Cause
Cooling fan fault
The intake filter is soiled.
The heatsink of the Power Cell is soiled.
Fault of the cell control board (CCB),
thermistor or Power Cell
Parameter setting error
Digital Operator Display
oH2
Cause
An external device triggered an overheat
warning in the drive.
Digital Operator Display
oL1
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.
The electrical thermal protection
characteristics and motor overload
characteristics do not match.
The electrical thermal relay is operating at the
wrong level.
Speed Search related parameters are set
incorrectly.
Output current fluctuation due to power
supply loss
134
IGBT Overheating
A thermistor temperature of the value set for L8-02 or higher has been detected.
Possible Solution
⇒If the cooling airflow is inadequate, replace the cooling fan.
⇒If the intake filter is soiled, clean it.
⇒Clean the heatsink of the Power Cell.
⇒Replace the cell control board (CCB), thermistor or Power Cell.
⇒Check the parameter settings.
Drive Overheat Warning
A "Drive Overheat Warning" was input to a sequence input terminal, 1 through 16 (H1-
= B).
Possible Solutions
Search for the device that tripped the overheat warning.
⇒Solving the problem will clear the warning.
Motor Overload
The electronic motor overload protection tripped.
Possible Solutions
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).
• Check the motor characteristics.
• Correct the type of motor protection that has been selected (L1-01).
• Install an external thermal relay.
• Check the current rating listed on the motor nameplate.
• Check the value set for the motor rated current (E2-01).
• Check values set to Speed Search related parameters.
• Adjust the Speed Search current and Speed Search deceleration
times (b3-02 and b3-03 respectively).
• After Auto-Tuning, enable Speed Estimation Speed Search (b3-24 =
1).
Check the power supply for phase loss.
Minor Fault Name
Minor Fault Name
Minor Fault Name
YASKAWA ELECTRIC EZZ010928 FSDrive-MV1000 Instructions
Minor Fault
Output
H2- =10
Yes
Minor Fault
Output
H2- =10
Yes
Minor Fault
Output
H2- =10
Yes