6
6190770 (Rev B)
106R Basic Systems User Guide
© 2023 JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
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
a . The air receiver is pressurized . The motor will start when
the pressure has dropped to the preset start pressure .
Empty the receiver .
b . Check that the mains supply agrees with the motor
label .
c . No power from mains . Check fuses and plug .
d . Bad connection or broken cable .
e . The motor is overheated and the thermal protection
has switched it off . When cooled the motor will turn on
automatically . Go to section 5 .
f . The compressor has not been unloaded and there
is back pressure on the piston . Ensure that the
compressor is unloaded each time it stops .
g . The motor is blocked .
h . Defective capacitor .
2. The compressor makes a buzzing sound but does not start
a . Leaky non-return valve . Dismount the pressure pipe and
check if air leaks from the non-return valve . Clean and
replace .
b . The motor is blocked .
3. The compressor runs but the pressure does not increase
a . Intake filter clogged . Replace .
b . Non-return valve is clogged . Clean or replace .
c . 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 .
d . Check the piston gaskets . Replace if necessary .
e . Defective valve plate . Contact your JUN-AIR distributor .
4. The motor gets very hot
a . The ambient temperature is too high . If the motor is
installed in a cabinet sufficient ventilation must be
ensured .
b . 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 .
c . The compressor is overloaded .
5. The compressor runs even if no air is tapped
a . 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.
a . Defective pressure switch . Replace .
PRESSURE VESSEL
Pressure tested at
I4-25 litre
24 bar
4-50 litre
18.3 bar
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 inspec-
tion and maintenance
The receiver must be kept in a hori-
zontal position
Corrosion protection
The surface treatment must be
maintained as required
Internal inspection at least every
five years
Drain condensate at least once a
week
Alternation/repair
No welding must be made on pres-
surized parts
Safety valve
Ensures that PS will not be ex-
ceeded
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 com-
pressor
PS - Maximum working pressure of
the receiver
