The vacuum chamber is
unable to provide the
maximum degree of
vacuum.
The cover of the vacuum
chamber is not opened, and
the air does not enter the
working chamber.
The vacuum degree in the
vacuum chamber is normal
but the air remains in the
package.
7-2
Malfunction and repair of vacuum solenoid valve
Fault
Poor quality sealing.
Start and stop are not
adjustable or impossible.
7-3
Faults and repair of single-phase vacuum pump with rotating blades
Fault
The pump cannot
achieve the maximum
degree of vacuum.
The pump cannot achieve the
maximum degree of vacuum.
Hose is leaking.
Loose connection of the hose.
Small gas element is leaking.
The vacuum chamber seal is
broken or damaged.
The upper panel of the vacuum
chamber is placed irregularly.
The isolating solenoid valve is
leaking (there is air in valve of
the main hose or the inlet valve).
There's not enough time to
pump the air.
The air bleed solenoid valve is
off.
The heat sealing setting is
improper and the distance is too
small.
Cause
Dirt is in the sealing area.
The sealing surface is damaged.
Rubber connecting elements for
sealing are damaged.
The wire is broken.
Fuse is blown.
The silicon switching diode is
damaged.
Winding is burned out.
The lifting element of the
bracket is dirty.
A rusty or broken spring causes
a lock.
Too low power supply voltage.
Cause
The lube oil is bad.
There is not enough oil in the
tank.
Leakage in the oil hose.
See table 7-3
Replace
Tighten
Replace
Align
See table 7-2
Increase
See table 7-2
Repair it to adjust the
starting position.
Solution
Remove
Repair or replace
Replace
Replace
Replace
Replace
Replace
Replace
Solution
After replacing the oil, re-set the
maximum degree of vacuum
Add oil up to the desired level.
Replace or repair the oil hose.
EN
21