NA
Y
AC
9. Troubleshooting
Fault
Possible reason
1. Wiring is malfunctioning.
2. ogeration voltage is
a normal.
3. Motor is malfunctioning.
4. Overload protector is active.
Pump cannot
5. Oil temperature is below 10
°
C
start
6. Pump is jammed.
7. Out of operating for long.
8. Oil is too viscous.
9. Exhaust filter or exhaust
line is clogged.
10. Pump inner parts are
damaged.
1. Vacuum system
configuration is unreasonable.
2. Vacuum system leak.
3. Measuring technique or
gauge is unsuitable.
4. Poor lubrication.
Pump cannot
4.1 Oil filter is obstructed.
reach ultimate 4.2 Oil is unsuitable.
pressure.
4.3 Oil channel is obstructed.
4.4 Oil is insufficient.
5. Anti-suckback oil valve is
malfunctioning.
6. Intake line is dirty.
1. Intake port line is clogged.
2. Connecting lines are too
Pumping
narrow or too long.
speed is too
3. Exhaust line is clogged.
low.
4. Oil mist filter is clogged.
5. Anti-suckback oil valve is
malfunctioning.
1 . Operation voltage is
abnormal.
2. Foreign matters entering
Noise is
into the pump.
abnormal.
3. The oil level of the pump
is too low.
4. The pump inner parts are
damaged.
1. Poor ventilation.
2. The fan is damaged.
3. Pumped gas temperature
is too high.
Pump gets
4. Poor lubrication.
hotter than
4.1 The oil filter or exhaust
usually
line is clogged.
observed.
4.2 Oil is unsuitable.
4.3 Oil channel is obstructed.
4.4 Oil is insufficient.
5. The condensator is dirty.
6. Ambient temperature is
too high.
10
Remedy
1. Check and repair wiring.
2. Make sure the voltage is within rated voltage's tolerance of ±10%.
3. Replace the motor.
4. Check the ambient temperature or pumoed gases temperature.
5. Increase the ambient temperature.
6. Repair the pump.
7. Repair the pump.
8. Change the oil.
9. Replace the filter or clean the exhaust line.
10. Repair the pump.
1. Choose a suitable pump.
2. Check the system.
3. Use correct measuring technique and gauge. Measure the
pressure directly at pump's intake port.
4.1 Change the oil filter.
4.2 Change the oil.
4.3 Clean the channel.
4.4 Add the oil to the level as requested.
5. Repair anti-suckback oil valve.
6. Clean vacuum lines.
1. Clean the intake port line.
2. Use adequately wide and short connecting lines.
3. Keep exhaust port line unobstructed.
4. Change the oil mist filter.
5. Repair anti-suckback oil valve.
1.1 Check the power supply, switches and wiring connection.
1 .2 Make sure the voltage is within rated voltage's tolerance of ±10%.
2. Repair the pump.
3. Add the oil to the level as requested.
4. Disassembly and replace the parts.
1. Improve ventilation environment.
2. Change the fan.
3. Add cold trap at intake port.
4.1 Replace oil filter or clean the exhaust line.
4.2 Change the oil.
4.3 Clean the channel.
4.4 Add the oil to the level as requested.
5. Clean the condensator.
6. Reduce ambient temperature.
Fault
Possible reason
Remedy
1. Oil comes from the
1. Check the vacuum system.
vacuum system.
Oil in the
2. Anti-suckback valve
intake line or in spring is obstructed.
2. Replace anti-suckback valve spring.
vacuum vessel. 3. Anti-suckback valve plate
is obstructed.
3. Replace anti-suckback valve plate.
Vacuum pressure 4. Oil level is high.
4. Drain the excess oil.
in system rises
1. Vacuum system leak.
1. Check the system.
too fast when
2. Anti-suckback valve is
pump stops.
malfunctioning.
2. Repair anti-suckback valve.
Too much oil
1. Too much oil in the pump.
1. Drain some oil.
in the exhaust
2. Continuous operation under
2. Shorten exhaust time.
port.
high pressure in the intake port.
3. Oil mist filter is obstructed.
3. Replace oil mist filter.
Sealing
1. The seal is damaged.
1. Replace the seal.
surface leak
2. Seal ring is damaged.
2. Replace the seal ring.
Table4
10. Warranty
NRD series vacuum pumps have one year guarantee from the date of purchase. Spare parts will be provided free of charge within
the period of guarantee in condition that the pump is operated according to the operating manual. The following failures will be charged
for repair:
1) Malfunction caused by nature disasters or artificial factors
2) Malfunction caused by special operating environment
3) Damage of wear parts
4) Malfunction caused by abnormal operation or incorrect use indentified by our engineers
Before the pump is delivered to our company for maintenance, it is required to acquire the information if the pump is contaminated
(and which kind of pollutants) or hazardous substances exist inside the pump. Without receiving this statement in advance, the pump
will be returned to the address of the sender.
11. Accessories
To ensure the stability of the pump, it is recommended to use genuine spare parts and accessories provided by the manufacturer.
If you need further assistance, please contact us.
The accessories below are for your selection:
1) Wear parts. Check the exploded view and spare parts list to select the required spare parts with corresponding item numbers.
2) Intake port/exhaust port other than default one
3) Dust filter
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