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6190900 (Rev B)
87R-4P Compressor System User Guide
© 2017, JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
WARRANTY POLICY
If, within the warranty time limits described below, the system or any of its components fail under normal use and service,
the original user-owner must contact an authorized JUN-AIR dealer with the product sale and service records. Should the
dealer not be able to complete the repair, the dealer may contact JUN-AIR for disposition. The product’s model and serial
number, the installation date, and the JUN-AIR invoice number must be furnished. Transportation charges both ways must
be paid by the dealer. If, upon receipt at the factory, an examination reveals faulty or defective original parts, materials,
or workmanship, JUN-AIR will, at its sole discretion, rebuild or replace. This warranty does not cover damages caused by
misuse, abuse, accident, or neglect. Unauthorized alterations or repairs made outside our factory will cancel this warranty
and charges for them will not be allowed.
COMPRESSOR SYSTEMS
All compressor systems sold and installed by authorized JUN-AIR dealers are warrantied to be free from defects in parts,
workmanship, and materials for 8,000 hours of operation or two (2) years from date of purchase, whichever occurs first.
This warranty excludes normal expected service items such as but not limited to: filters/filter kits, o-rings, and hoses. It
also excludes add-on accessories that carry their own specific manufacturer’s warranty.
TROUBLESHOOTING (Continued)
Problem
Possible Cause(s)
Possible Solution(s)
Compressor cycles, but tank
pressure does not reach 8 bar
(116 psi)
Solenoid valve does not close or leaks
when compressor runs
Check the solenoid valve and contact an
authorized dealer for service.
Intake filter is clogged or dirty
Replace the intake filter(s).
Leak in the system
Close the storage-tank outlet valve and
check all fittings for leaks. If a leak is
detected, contact an authorized dealer for
service.
Leak in the device air system
With the compressor system connected
to the device-air system and the regulator
valve open, run the compressor until the
cut-out pressure is reached and the com-
pressor is switched off, and then close the
regulator valve. After five minutes, open
the regulator valve and observe the system
pressure drop. If the pressure drop exceeds
0.5 bar (7.5 psi), there is a leak in the device
air system. If a leak is detected, contact an
authorized dealer for service.
Cut-in and/or cut-out pressures are
out of adjustment
Adjust the pressure switch (see MAINTE-
NANCE).
