Invacare Perfecto 2 Series Service Manual page 17

SYMPTOM
Power Loss:
(Continued)
Internal Status Indicators:
RED: Off
GREEN: Off
Unit plugged in, power
switch, alarm off. Battery
Free circuit drained
Internal Power
Loss Senso :
2
Internal Status Indicators:
RED: Off
GREEN: Off
Alarm may or may not be on.
Control Panel Indicators:
RED: Off
YELLOW: Off
GREEN: Off
Fan operates, Compressor
not operating.
High Pressure:
Internal Status Indicators:
RED: One Flash
GREEN: Two Flashes
Unit plugged in, power switch
on, continuous alarm.
Compressor shut down.
Part No 1148070
PROBABLE CAUSE
P.C. board.
a. P.C. board damaged.
b. Loose or damaged connector.
Transformer assembly.
a. Faulty.
b. Connector loose or
disconnected.
c. Faulty wiring.
P.C. board faulty.
P.C. board:
a. Malfunction
b. Disconnected wire.
c. Shifting valve at pressures greater
than 25 p.s.i. for Perfecto2.
4-way Valve:
a. Not shifting.
b. Bad coil.
c. Coil resistance.
Compressor inlet filter dirty or
plugged.
17
SECTION 4—TROUBLESHOOTING
SOLUTION
a. Replace P.C. Board. Refer to
Replacing P.C. Board on page 59.
b. Repair or replace connector.
a. Replace. Refer to Replacing the
Transformer on page 62.
b. Reattach connector.
c. Replace transformer assembly. Refer
to Replacing the Transformer on
page 62.
Replace P.C. board. Unit requires retiming
after P.C. board replacement. Refer to
Replacing P.C. Board on page 59.
a. Set flow to max L/min. for
concentrator. Check voltage across
Pilot Valve 1 on 200 volt scale. If
meter reads 0 volts when unit is
turned on, replace P.C. board
b. Check spade connectors on pilot
valves 1 or 2 and connectors on P.C.
board.
c. Replace P.C. board. Unit requires
retiming after P.C. board
replacement. Refer to Replacing P.C.
Board on page 59.
a. Check voltage. If voltage rises to
approximately 24 volts D.C. when
unit shuts down, P.C. board is
functioning properly. Replace the
valve if shorted or open. Refer to
Replacing 4-Way Valve and/or
Manifold Assembly on page 66.
b. Replace 4-way valve. Refer to
Replacing 4-Way Valve and/or
Manifold Assembly on page 66.
c. Coil should read 175 ohm ± 20.
Replace compressor inlet filter. Refer to
Replacing the Compressor Inlet HEPA
Filter on page 26.
™
Perfecto
2