Kansai Electric Heat Corp≪sys alarm≫

HOW TO DEAL WITH FREQUENCY ABNORMALITY

The frequency supplied from the primary power supply is the rated frequency (50 / 60Hz)
When ± 3Hz is exceeded, "SYS" flashes in the indicated PV section and "ALM" flashes in the setting SV section, and all operations stop. We have adopted the "zero cross cycle control method" as the heater control method for the hot air generator.
This is a control method that adjusts the power supplied to the heater by changing the ON / OFF ratio at the zero point of the AC voltage (sine and cosine waveform) in a fixed cycle.
Therefore, it is judged that normal temperature control cannot be performed when the primary power supply is supplied with a power supply exceeding the rated frequency of ± 3 Hz, when a power supply with noise is supplied, or when a surge voltage is supplied. Causes a frequency abnormality.
From the above, if this abnormality occurs, we recommend that you review and improve the primary power supply.　

　　《Main Cause》　　

Please check if there are any of the following equipment in the vicinity of the hot air generator and incidental equipment.

　　・　Not supplied with rated frequency by using a generator etc. for the primary side power supply

　　・　Applying surge voltage from an electromagnetic contactor or the like provided on the primary side

　　・　Noise from inverters installed in motors and fluorescent ballasts in nearby equipment (small capacity does not have an effect, but it may be affected if the quantity is large).

　　・　Distorted current due to magnetic saturation phenomenon generated from the iron core of transformers of nearby equipment

　　・　Arc current of arc furnaces of nearby equipment

　　・　Noise from control equipment that uses inverters or thyristors (phase control) that have rectifier circuits for nearby equipment.

　　・　Noise from DC converters (rectifiers) that perform AC and DC conversion of power supplies in nearby equipment (large rectifiers used in plating tanks, etc.)

　　・Noise from equipment using welding machines, servo motors, etc. of nearby equipment

　　However, if the primary power supply such as a generator is temporarily used due to a test run, or if the primary power supply cannot be improved by any means, this frequency abnormality can be ignored by changing the control method of the hot air generator. can.

　　　In this case, please agree to the following precautions, fill in the necessary items, and send it, and we will reply to you in accordance with the "Control Method Change Manual".

　　　Please fully understand and consider the following precautions before requesting the "Control Method Change Manual".

		Precautions for changing the control method * Please be sure to read.
		Change the control method from zero-cross cycle control to time-proportional control (ON / OFF control). This does not reduce the accuracy rating of the discharge temperature.
		By changing the control method, the supply of power other than the sinusoidal waveform, the supply of power with noise, and the application of surge voltage are ignored from the primary power supply. Therefore, there is a high possibility that the hot air generator will fail due to these causes.
		By changing the control method, the supply of power other than the sinusoidal waveform, the supply of power with noise, and the application of surge voltage are ignored from the primary power supply. Therefore, even if the hot air generator is within the warranty period, the warranty does not cover failures caused by the supply of power other than the sinusoidal waveform, the supply of power with noise, and the application of surge voltage from the primary power supply.

I agree with the above precautions. After agreeing to the above precautions, please fill in the following required items and send. (* Mark is a required item.)
^{COMPANY NAME ※}
DEP.
NAME^※
ADDRESS

PHONE ^※
FAX ^※
Email ^※
MACHINE MODEL ^※
MACHINE TYPE ^※
TIS NO. ^※	ＴＩＳ S
SEREAL NO. ^※
RETAILER
OTHER