Invacare Perfecto 2 Series Service Manual page 18

SECTION 4—TROUBLESHOOTING
SYMPTOM
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).
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.
™
Perfecto
2
PROBABLE CAUSE
Compressor:
a. Leaks at fittings or tubing
b. Leaking or defective relief valve.
c. Insufficient voltage at outlet.
d. Worn cup seals or gaskets.
Heat exchanger:
a. Leak at tubing or body chamber.
b. Inspect tubing and heat
exchanger.
Regulator cracked or leaking.
P.E. valve leaking.
Defective main valve coil.
Connector loose.
Defective P.E. valve coil. (Resistance
80 ohm's ± 10.)
Defective P.E. valve.
Connector loose.
Defective P.C. board.
18
SOLUTION
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
2660 Compressor on page 35.
a. Replace or retighten.
b. Replace or retighten tubing. Replace
heat exchanger. Refer to Replacing
Heat Exchanger Assembly on
page 52.
Replace regulator. Refer to Replacing
Regulator on page 49.
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.
a. Replace main valve.
b. Replace main valve coil.
Reattach connector.
Replace P.E. coil if shorted or open on
resistance check. Refer to Replacing P.E.
Valve on page 43.
Replace P.E. valve. Refer to Replacing P.E.
Valve on page 43.
Reattach connector.
Replace P.C. board. Refer to Replacing
P.C. Board on page 59.
Part No 1148070