Jun-Air 2xOF1202-150B, Operating Manual

Page: 9 / 60

9
Fault finding and repair
Important
Switch off and isolate from electrical supply before
removing any parts from the pump. Empty air
receiver of air before performing any operation on the
compressors' pressure system.
1. Compressor does not start
The air receiver is pressurized. The motor will start when
the pressure has dropped to the preset start pressure.
Empty the receiver.
Check that the mains supply agrees with the motor label.
No power from mains. Check fuses and plug.
Bad connection or broken cable.
The motor is overheated and the thermal protection
has switched it off. When cooled the motor will turn on
automatically. Go to section 5.
The compressor has not been unloaded and there is back
pressure on the piston. Ensure that the compressor is unloaded
each time it stops.
The motor is blocked.
Defective capacitor.
2. The compressor makes a buzzing sound but does not start
Leaky non-return valve. Dismount the pressure pipe and
check if air leaks from the non-return valve. Clean and
replace.
The motor is blocked.
3. The compressor runs but the pressure does not increase
Intake filter clogged. Replace.
Non-return valve is clocked. Clean or replace.
Leaks in fittings, tubes or pneumatic equipment. Check
with soapy water or by letting unit stay over night
disconnected from mains. Pressure drop should not exceed
1 bar.
Check the piston gaskets. Replace if necessary.
Defective valve plate. Contact your JUN-AIR distributor.
4. The motor gets very hot
The ambient temperature is too high. If the motor is
installed in a cabinet sufficient ventilation must be ensured.
Leaks in fittings, tubes or pneumatic equipment. Check
with soapy water or by letting unit stay over night
disconnected from mains. Pressure drop should not exceed
1 bar.
The compressor is overloaded.
5. The compressor runs even if no air is tapped
Leaks in fittings, tubes or pneumatic equipment. Check
with soapy water or by letting unit stay over night
disconnected from mains. Pressure drop should not exceed
1 bar.
6. The compressor does not start at min pressure or does
not stop at max pressure.
Defective pressure switch. Replace.
a.
b.
c.
d.
e.
f.
g.
h.
a.
b.
a.
b.
c.
d.
e.
a.
b.
c.
a.
a.
Pressure vessel
Pressure tested at: 4-5 litre:
40-50 litre:
Directions for use
Application Receiver for compressed air.
Receiver specifications See name plate.
Installation
Tubes, etc. must be installed with
suitable materials.
Placement Observe the working temperature
of the receiver.
Ensure sufficient room for
inspection and maintenance.
The receiver must be kept in a
horizontal position.
Corrosion protection The surface treatment must be
maintained as required.
Internal inspection at least every
5 years.
Drain condensate at least once a week.
Alternation/repair No welding must be made on
pressurised parts.
Safety valve Ensures that PS will not be exceeded.
Never adjust to a higher pressure
than PS.
The capacity of the valve must be
calculated in accordance with the
volume of air supplied by the
compressor.
(PS = Maximum working pressure
of the receiver)
Declaration of Conformity
NOTE: The declaration of conformity is valid for units operating
at 0 V/50 Hz, x400 V/50 Hz, 1 V DC or 4 V DC.
The manufacturer, JUN-AIR International A/S, declares that the
products mentioned in this manual are in conformity with:
• 87/404/EEC - 90/488/EEC - 9/68/EEC Council Directive
relating to Simple Pressure Vessels
• 98/7/EC Machinery Directive
• 89/6/EEC Council Directive of Electric Magnetic
Compatibility
• 7//EEC Low-voltage Directive
Flemming Frisch Andersen
Test and Certification Administrator
24 bar
18.3 bar
Operating manual
GB