NAVAC Master Series, User Manual, Page: 5 / 6

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N.A Yf .AC
V. Troubleshooting
Malfunction Possible Cause
Remedy
1. Secondary air inlet connection cap loose on the
air inlet port.
Tighten the cap.
2. Damaged rubber ring inside the secondary air
inlet connection cap.
Replace the rubber ring.
3. The volume of oil is insufficient. Add oil
to
the center line of the oil display.
4. Pump oil becomes opaque or absorbed too
many impurities.
Replace with new oil.
Low
5. The pump's oil en;;r, hole is clogged or the oil
Clean the oil entry hole, clean the oil filter.
supply is insufficien .
Vacuum
6. The pump connecting hoses. manifold or Inspect the connecting hose gaskets and
system has a leak. system, repair leaks.
7. The pump selection is wrong.
Check the size of the container to be evacuated,
recalculate and select an appropriate pump
model.
8. The pump has been used for too long, damage
and wear to components caused increased
gaps between parts.
Inspect and repair, or replace the pump.
Oil leak
1. Damaged oil seal. Replace the oil seal.
2. Loose or damaged oil box connections. Tighten the connecting screws, replace 0-rings.
1. Excessive oil volume. Remove oil until the oil position line is reached.
Oil spray
2. Inlet port pressure is excessively high for a long
period.
Select an appropriate pump, increase the
pumping speed.
Exposed the air entry hole to the external
1. Oil temperature is too low.
atmosphere, and remove the oil fume filtration
device. Use a screwdriver to tum the engine
axle in an antklockwise direction.
Start-up
2. Motor, power source or circutt board
Inspect and repair.
problems
malfunctions.
3. Foreign objects entered the pump.
Inspect and remove.
4. Voltage supply is excessively low or high. Inspect the power source voltage.
5. Overload trips.
After overload trip occurs, swttch kept On.
Remove battery, wait for approximately 30
seconds before inspecting and repairing.
Notes:
1. The pump is inverter driven and the motor has over-current/ overload protection, please
troubleshoot after overload resets.
2. If the above methods cannot resolve your problems, please contact your nearest distributor or take
the pump to a repair center. We will do our best to provide you with a quick turnaround to keep you
working.
Requirements For Warranty Coverage
Product warranty is provided for product quality problems for two years from date of sale. For
warranty to be valid, the following conditions must be met:
1. Products issues due to manufacturing defects confirmed by qualified agents.
2. Products which have not been maintained or dismantled by unauthorized parties.
3. Products that have been used in accordance with the User Manual. All maintenance services shall
be performed during the warranty period.
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Empowering you to work smarter
N.A Yf .AC
Statement: Other than repairing the product defective, the manufacturer of this product will not be
liable for any other costs, such as time spent in fixing the issue, refrigerant consumption,
refrigerant disposal costs, as well as unauthorized transportation and labor costs.
VI. Dimension
Model
A A1
A2
A3 B B1 B2 H H1 H2
NP2DLM
9.6"
7.7"
4.9" 2.8" 3.5"
2.2"
2.4" 5.3" 5.9" 7.6"
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