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© 2017, JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
87R-4P Compressor System User Guide
6190900 (Rev B)
TROUBLESHOOTING
Problem
Possible Cause(s)
Possible Solution(s)
Compressor does not start
No electrical power
Check the circuit breaker at the main power
source.
Power not connected
Check the power cord at both ends.
Power not switched on
Verify that the system power switch is in the
on position.
Defective power switch
The power switch needs to be replaced.
Contact your authorized dealer for service.
Fuse is blown or damaged
Check the fuse(s) in the electrical inlet.
Circuit breaker trips when the
compressor attempts to start
Voltage is too low
The compressor requires a minimum of
103 V/207 V. If the voltage is below the
minimum required, a buck-boost transform-
er must be installed.
Solenoid valve does not open when the
compression cycle ends
Contact an authorized dealer for service.
Power supply cable is too small
See SITE REQUIREMENTS for the current
draw for the applicable system, and select
the appropriate wire gauge size.
Loose electrical connections
Contact an authorized dealer for service.
Unusual or excessive noise
Intake filter is not seated correctly
Remove and replace the filter if it is clogged
or dirty. Ensure that the filter chamber is
clean and the filter is seated properly during
installation.
Intake filter(s) is clogged or dirty
Replace the filter.
Noisy compressor
Contact an authorized dealer for service.
Air leaks
Close the storage-tank outlet valve and
check all fittings for leaks. If a leak is found,
contact an authorized dealer for service.
Cooling fan
Check for a loose or broken fan. Contact an
authorized dealer for service.
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