JUN-AIR JAir Dental Compressed Air System - Manual (Page 19)

19
© 2011, JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
JUN-AIR Dental Compressed Air System User Guide CI-101A (Rev B)
Problem Possible Cause(s) Possible Solution(s)
5 . Compressor cycles when there is
no air demand from the operator/
operatories
a. Leak in the compressor system a . See 4C
b. Leak in the office air system b. Look at the moisture indicator (see KEY PARTS
to locate .) If it is blue . . . .With the power switch
ON, (if necessary) drain the storage tank to 80
psi to start the compression cycle . When the
cycle shuts off at 100 psi, close the air outlet
valve . Wait 5 minutes . Open the air outlet valve .
If the pressure drops, (by more than 5 psi) the
air leak is in the office air system or delivery units
and not in the Compressor System . Call your
authorized dealer for service .
NOTE: If it is pink - see #6 below .
6. Moisture indicator is pink* a. Leak in the office air system a . If the moisture indicator is pink, there is too much
moisture in the system .
CAUTION: Call your authorized dealer for
service .
b . Compressor keeps cycling b . Check the “SPECIFICATIONS” . There may be
excessive demands placed on the Compres-
sor System . A larger capacity model may be
required .
c . The solenoid valve requires attention c . It is normal to hear air escaping from the sole-
noid valve when the compressor shuts off . If air
does not escape, the valve could be clogged or
sticking . Call your authorized dealer for service .
* In initial installations, the moisture indicator may appear pink before operating the system, this is due to ambient air in the sys-
tem and will change to blue after operation of the system .
TROUBLESHOOTING CHART
DIAGNOSTIC PROCEDURE FOR DEFECTIVE COMPRESSOR(S)
1 . Turn compressor power switches to the OFF
position .
WARNING: Always turn off compressor
and remove power from unit when ser-
vicing or removing electrical cover. Lock
out power at the breaker prior to servic-
ing.
2 . Reset the circuit breaker if it was previously
tripped .
3 . Test compressors by turning ONE on at a
time using compressor switches located in
electrical panel . (Start only 1 compressor at a
time and disconnect power between testing
compressors) . If the motor fails to start, or the
circuit breaker trips, the problem may be in that
compressor. Leave the compressor switch for
the defective compressor in the OFF position .
Call your authorized dealer for service .
NOTE: One or two compressors (depending
on system size) may be run temporarily while
waiting for service.
4 . If all compressors run independently, but will not
run together, check the line voltage . If the voltage
is within the min/max. voltage required in SITE
REQUIREMENTS, call your authorized dealer for
service .