SECTION 4—TROUBLESHOOTING
Perfecto
2
™
18
LOW PRESSURE:
Internal Status Indicators:
RED: One Flash
GREEN: One Flash
Or
RED: One Flash
GREEN: Three Flashes
Control Panel Indicators:
RED: On
YELLOW: Off
GREEN: Off
Unit plugged in, power switch
on, continuous audible alarm.
Compressor shut down
(Failure to cycle due to low
pressure).
Compressor:
a. Leaks at fittings or tubing
b. Leaking or defective relief valve.
c. Insufficient voltage at outlet.
d. Worn cup seals or gaskets.
a. Replace or repair.
b. Repair leak or replace.
c. DO NOT use extension cords. Use
another outlet.
d. Rebuild top end of compressor. Refer
to Rebuilding the Thomas Model
Heat exchanger:
a. Leak at tubing or body chamber.
b. Inspect tubing and heat
exchanger.
a. Replace or retighten.
b. Replace or retighten tubing. Replace
heat exchanger. Refer to Replacing
Regulator cracked or leaking.
Replace regulator. Refer to Replacing
Regulator on page 49.
P.E. valve leaking.
Replace P.E. Valve. Check voltage at P.E.
valve connector on 24 volt D.C. scale. The
P.E. Valve activates or energizes
approximately one second prior to the
activation of the 4 way valve with
approximately 24 volts. If voltage is in
excess of 24 volts consistently, replace the
P.C. board. Refer to Replacing P.C. Board
on page 59. If the P.C. board voltage acts
normally, replace the P.E. valve. Refer to
Replacing P.E. Valve on page 43.
NOTE: Check for leaks starting at
the compressor output through all
the pneumatic connections. Major
leaks will cause system pressures to
remain below adequate shift
(exhaust) pressures and will cause
compressor shutdown.
Defective Parts:
Internal Status Indicators:
RED: One Flash GREEN: Five
Flashes
Or
RED: Two Flashes
GREEN: Three Flashes
Control Panel Indicators:
RED: On
YELLOW: Off
GREEN: Off
Unit plugged in, power switch
on, continuous audible alarm.
Compressor shut down.
Defective main valve coil.
a. Replace main valve.
b. Replace main valve coil.
Connector loose.
Reattach connector.
Defective P.E. valve coil. (Resistance
80 ohm’s ± 10.)
Replace P.E. coil if shorted or open on
resistance check. Refer to Replacing P.E.
Valve on page 43.
Defective P.E. valve.
Replace P.E. valve. Refer to Replacing P.E.
Valve on page 43.
Connector loose.
Reattach connector.
Defective P.C. board.
Replace P.C. board. Refer to Replacing
P.C. Board on page 59.
SYMPTOM
PROBABLE CAUSE
SOLUTION
