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Air Techniques, Inc.
AS12, AS22, AS50, AS70,
I n t e r n a t i o n a l
*
DIAGNOSTIC PROCEDURE FOR DEFECTIVE COMPRESSOR HEAD(S)
1. Put power switches in the OFF position.
2. Reset the circuit breaker if it was previously tripped.
3. Test heads by turning ONE on at a time. If the motor fails to start, or the circuit breaker trips, the problem may be in that compressor
head. Leave the power switch for the effective head in the OFF position. Call your Authorized Air Techniques dealer for service.
NOTE:
One head may be run TEMPORARILY while waiting for service.
4. If all heads run independently, but will not run together, check the line voltage. If the voltage is within the min./max. voltage required
in PRODUCT SPECIFICATIONS, call your Authorized Air Techniques dealer for service.
TROUBLESHOOTING
Problem
Possible Cause
Possible Solutions
5 . Compressor cycles
even when there is no
air demand from the
operatory .
a . Leak in the compressor . a . Disconnect the main power supply . Drain the
storage tank slowly until a “click” is heard .
Storage tank pressure should read 85 PSI on
the pressure gauge .
Close the tank outlet valve, turn on the
power switch and verify the pump-up time
for your model
AirStar
. Call your authorized
Air Techniques dealer if the pump-uptime is
incorrect . (See Post Installation Check for
pump-up times .)
b . Leak in the office air
system .
b . Look at the moisture monitor
(see KEY PARTS to locate) .
If it is blue, perform the following:
1 . With the
AirStar
’s power switch ON,
drain the storage tank to 85 PSI to start
the compression cycle .
2 . When the cycle shuts off at 115 PSI,
close the storage tank outlet valve .
3 . Wait 5 minutes and open the storage tank
outlet valve .
4 . If the pressure drops, the air leak is in
the office air system or delivery units and
not in the
AirStar
. Call your dealer or
plumber for service .
If it is pink, see #6 below
6 . Moisture monitor is not
blue (pink or white) .
a . Leak in the office air
system .
a . If the moisture monitor is pink, there is too
much moisture in the system . Call your
authorized Air Techniques dealer for service .
b . Compressor keeps
cycling .
b . Check the SIZING GUIDE . There may be
excessive air demands placed on the
AirStar
.
A larger capacity model may be required .
7 . Cut-In / Cut-Out pres-
sures are not 85 / 115PSI .
Pressure switch needs
adjustment.
a. Adjust Cut-In pressure setting by turning
down nut on larger spring (center) for higher
pressure, or up for lower pressure .
b. Adjust Cut-Out pressure setting by turning
down nut on smaller spring (left) for higher
pressure, or up for lower pressure .
Cycle system after each adjustment to check
settings .
