YASKAWA E1000 Technical Manual page 278

6.5 Alarm Detection
Digital Operator Display
Cause
Surrounding temperature is too high
Internal cooling fan has stopped.
Airflow around the drive is restricted.
Digital Operator Display
Cause
An external device triggered an overheat Alarm in
the drive.
Digital Operator Display
Cause
Motor thermostat wiring is fault (PTC input).
There is a fault on the machine side (e.g., the
machine is locked up).
Motor has overheated.
Digital Operator Display
<1>
Cause
Motor has overheated.
Digital Operator Display
Cause
Inappropriate parameter settings.
There is a fault on the machine side (e.g., the
machine is locked up).
Digital Operator Display
Cause
Surge voltage present in the drive input power.
The motor is short-circuited.
Ground current has over-charged the main circuit
capacitors via the drive input power.
Noise interference causes the drive to operate
incorrectly.
Digital Operator Display
Cause
MEMOBUS/Modbus test has finished normally.
278
Heatsink Overheat
oH
The temperature of the heatsink exceeded the overheat pre-alarm level set to L8-02 (90-100°C). Default value for L8-02 is
determined by drive capacity (o2-04).
• Check the surrounding temperature.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool surrounding area.
• Remove anything near drive that may cause extra heat.
• Replace the cooling fan.
• After replacing the drive, reset the cooling fan maintenance parameter to (o4-03 = "0").
• Provide proper installation space around the drive as indicated in the manual.
page 44.
• Allow for the specified space and ensure that there is sufficient circulation around the control panel.
• Check for dust or foreign materials clogging cooling fan.
• Clear debris caught in the fan that restricts air circulation.
Drive Overheat Alarm
oH2
"Drive Overheat Alarm" was input to a multi-function input terminal, S1 through S8 (H1-= B)
• Search for the device that tripped the overheat warning.
• Solving the problem will clear the warning.
Motor Overheat
oH3
The motor overheat signal entered to a multi-function analog input terminal exceeded the alarm level (H3-02, H3-06 or H3-10 = E).
Repair the PTC input wiring.
• Check the status of the machine.
• Remove the cause of the fault.
• Check the load size, accel/decel times, and cycle times.
• Decrease the load.
• Increase accel and decel times (C1-01 to C1-04).
• Adjust the preset V/f pattern (E1-04 through E1-10). This will mainly involve reducing E1-08 and E1-10.
Note: Do not lower E1-08 and E1-10 excessively, because this reduces load tolerance at low speeds.
• Check the motor-rated current.
• Enter motor-rated current on motor nameplate (E2-01).
• Ensure the motor cooling system is operating normally.
• Repair or replace the motor cooling system.
Motor Overheat (NTC Input)
oH5
The motor temperature exceeded the level set in L1-16.
• Reduce the load.
• Check the ambient temperature.
Overtorque 1
oL3
Drive output current was greater than L6-02 for longer than the time set in L6-03.
Check parameters L6-02 and L6-03.
• Check the status of the machine.
• Remove the cause of the fault.
DC Bus Overvoltage
The DC bus voltage exceeded the trip point.
ov
For 200 V class: approximately 410 V
For 400 V class: approximately 820 V
• Install a DC reactor or an AC reactor.
• Voltage surge can result from a thyristor convertor and a phase advancing capacitor operating on the same drive input power
system.
• Check the motor power cable, relay terminals and motor terminal box for short circuits.
• Correct grounding shorts and turn the power back on.
• Review possible solutions for handling noise interference.
• Review section on handling noise interference and check control circuit lines, main circuit lines and ground wiring.
• If the magnetic contactor is identified as a source of noise, install a surge protector to the MC coil.
Set number of fault restarts (L5-01) to a value other than 0.
PASS
MEMOBUS/Modbus Comm. Test Mode Complete
This verifies that the test was successful.
Minor Fault Name
Possible Solutions
Refer to Cooling Fan Component Names on page
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual
303.
Refer to Installation Orientation and Spacing on