PROMARKS TC-420, Operation Manual

Page: 17 / 35

16
7. TROUBLE SHOOTING
7.1 Possible problems and remedies are identified as below:
Problem Possible cause Possible remedy
Control panel is under normal
function, but vacuum pump
will not start.
The KM1,QM1, MCB1, MCB2
protector are disconnect.
Check each parts and turn
on the switch.
Vacuum pump does not run. The power requirement is not
match those given on nameplate.
Change power source.
Insufficient vacuum in
chamber.
Low oil level in vacuum pump.
Vacuum pump is rotating in
wrong direction.
Lid silicone rubber damage.
Vacuum valve does not open.
Add oil if necessary.
Re-polarize motor.
Replace.
Clean membrane rubber.
Insufficient vacuum in bag.
Note: Most frequently
insufficient vacuum in bag is
due to leakage in bag not
fault in machine.
Bag is leaking.
Sharp corners penetrate bag.
Bag is too large.
Change bag.
Change bag.
Use thicker bag.
Vacuum pouch is easily
pulled apart by hand.
Sealing time (temperature) is
too short(low).
Adjusting.
Sealing area has some burnt
mark or bubbles appearance.
Sealing area jam with oil or meat
juice.
Sealing time (temperature) is
too long(high).
Clean it.
Lid does not open Vacuum valve broken Replace