Cleveland Range inverter manual Trial run, Operation precautions, Fault prevention precautions

(3) Trial run

Check all parameters during operation. Changing parameter values might be required depending on the load.

Always apply permissible range of voltage to the each terminal as indicated in this manual. Otherwise, it could lead to inverter damage.

(4) Operation precautions

When the Auto restart function is selected, stay away from the equipment as a motor will restart suddenly after an alarm stop.

The Stop key on the keypad is valid only when the appropriate function setting has been made. Prepare an emergency stop switch separately.

If an alarm reset is made with the reference signal present, a sudden start will occur. Check that the reference signal is turned off in advance. Otherwise an accident could occur.

Do not modify or alter anything inside the inverter.

Motor might not be protected by electronic thermal function of inverter.

Do not use a magnetic contactor on the inverter input for frequent starting/stopping of the inverter.

Use a noise filter to reduce the effect of electromagnetic interference. Otherwise nearby electronic equipment may be affected.

In case of input voltage unbalance, install AC reactor. Power Factor capacitors and generators may become overheated and damaged due to potential high frequency noise transmitted from inverter.

Use an insulation-rectified motor or take measures to suppress the micro surge voltage when driving 400V class motor with inverter. A micro surge voltage attributable to wiring constant is generated at motor terminals, and may deteriorate insulation and damage motor.

Before operating unit and prior to user programming, reset user parameters to default settings.

Inverter can easily be set to high-speed operations, Verify capability of motor or machinery prior to operating unit.

Stopping torque is not produced when using the DC-Break function. Install separate equipment when stopping torque is needed.

(5) Fault prevention precautions

Provide a safety backup such as an emergency brake which will prevent the machine and equipment from hazardous conditions if the inverter fails.

(6) Maintenance, inspection and parts replacement

Do not conduct a megger (insulation resistance) test on the control circuit of the inverter. Refer to Chapter 6 for periodic inspection (parts replacement).