High frequency (high frequency machine) common maintenance instructions

During high-frequency heating, the mold and rubber must be kept clean, otherwise flashover will occur. If yes, check if the mold is burnt out. If there are gaps, they must be repaired. If the mold is not cleaned, clean it with washing water (day water). The copper sheet of the grounding wire is often damaged due to pressure, if it is replaced. The moisture of the compressed air will accumulate in the water bottle, please remove the water in the water bottle before using the machine each time. If the lubricating oil in the lubricator is on the indicator line, special oil must be added (the lubricating oil should use corrosive oil agent such as accumulation rack (PS-5). The dust should be cleaned once a month in the machine (especially the accumulation in the oscillator Dust.) The mechanical parts must be refueled once every two to three months.
Inspection instructions:


Fault phenomenon

Inspection steps

Inspection Method


The fan is not running

1) The input power is linearly interrupted
2) Damaged fan

Input voltage 220V
Check whether the fan coil is burnt out and whether the fan blade rotates flexibly.


The turntable is not flexible

1) Insufficient input air pressure or air leakage
2) Rotating shaft burned out
3) The air cylinder pushing the shaft is damaged
4) Damage of solenoid valve

Check whether the air pressure reading 4KG-6K air hose leaks
Check if the pump is normal
Directly connected to 220V electric inspection


Inflator can't push the mold down

1) Turntable triggers microphone fault
2) Fall time system damage
3) The pump is damaged
4) Damage of solenoid valve
5) Damaged relay

Check contact position and test microphone system
Whether the replacement certificate is damaged
Air source test
Directly connected to 220V electric inspection
Replacement check


When the high frequency output, the motor immediately cuts off and the output mold also picks up immediately

1) Die jump
2) The output current is too large
3) The sparker is damaged
4) Short circuit of output capacitor
5) High voltage grounding
6) The electronic tube is damaged

Check if the mold is burnt out
Reduce high cycle output scale
Check whether the PL5557 is damaged, and the spark-to-ground voltage is not 25V
Check if there is a short circuit in the capacitor, check if there is a short circuit in the 300P capacitor
Whether the high-voltage copper sheet is grounded or not


Ammeters over 0.9A motor cannot cut off the output

1) The relay is damaged
2) Burnout of variable resistor

Interchange to see if there is any damage
Measure whether the resistance is normal


Worker jump

1) The output force is too large
2) Insufficient mold heat
3) The mold is not parallel to the weld
4) Insufficient air pressure

Reduce output
Check whether the indicator light of the heater is on, if it is on, it indicates that the temperature is insufficient (indicating about 140 ℃) to see if the upper and lower molds are parallel
Normally 4KG-6KG


No high frequency output

1) The filament transformer is damaged
2) High frequency transformer damage
3) Burnout of gate resistance
4) The electronic tube is damaged

Transformer input 220V output 6.3V
Input 220V, output 7500V
Is the quantity resistance normal?
Change tube


After the heightening week, the mold cannot rise

1) The rise time system is damaged
2) The relay is damaged
3) Electromagnetic gas system damage
4) Damaged pump

Connect 220VC to check
Check the air source to see if the launch and recovery are normal


No heat output from the heater

1) Burning the heating wire
2) The thermostat is damaged

Measuring the resistance of the heating wire
Replace thermostat


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