Invacare Platinum IRC5LXO2AW Service Manual page 21

SYMPTOM
High Pressure
Internal Status Indicators:
RED: One Flash
GREEN: Two Flashes
Unit plugged in, power switch on,
continuous alarm. Compressor shut
down.
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.
Part No 1118396
PROBABLE CAUSE
P.C. board:
a. Malfunction
b. Disconnected wire
c. Shifting valve at pressures
greater than 25 psi
4-way Valve:
a. Not shifting.
b. Defective coil.
Sieve Beds contaminated
Compressor inlet filter dirty or plugged Replace compressor inlet filter. Refer to Replacing
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
PE valve leaking
Defective main valve coil
Connector loose
Defective PE valve coil (Resistance 80
ohms ± 10)
Defective PC Board
Defective PE valve coil (Resistance 80
ohms ± 10.)
Connector loose
Defective P.C. board
21
SECTION 4—TROUBLESHOOTING
SOLUTION
a. Set flow to max L/min. for concentrator.
Check voltage across Pilot Valve 2 on 200
volt scale. If meter reads 0 volts when unit
is turned on, replace P.C. board.
b. Check spade connectors on pilot valve 2 and
connectors on P.C. board.
c. Replace P.C. board. Refer to Replacing P.C.
Board on page 54.
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 on
page 60.
b. Coil resistance should read 80 ohm ± 10.
Replace 4-way valve. Refer to Replacing 4-
Way Valve on page 60.
a. Replace Sieve Beds. Refer to Replacing Sieve
Beds on page 40.
the Compressor Inlet Filter on page 28.
a. Tighten fittings. Replace or repair.
b. Repair leak or replace.
c. DO NOT use extension cords. Use another
outlet.
d. Replace the compressor. Refer to
Compressor on page 35.
a. Replace or retighten.
b. Replace or retighten tubing. Replace heat
exchanger. Refer to Replacing Heat
Exchanger on page 47.
Replace regulator. Refer to Replacing Regulator on
page 44.
Replace PE Valve. Check voltage at PE valve
connector on 24 volt D.C. scale. The PE 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 54. If the P.C. board
voltage acts normally, replace the PE valve. Refer to
Replacing PE Valve on page 38.
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.Refer to Replacing 4-
Way Valve on page 60.
b. Replace main valve coil. Refer to Replacing
4-Way Valve on page 60.
Reattach connector.
Replace PE coil if shorted or open on resistance
check. Refer to Replacing PE Valve on page 38.
Replace PC Board. Refer to Replacing P.C. Board
on page 54.
Replace PE coil if shorted or open on resistance
check. Refer to Replacing PE Valve on page 38.
Reattach connector.
Replace P.C. board. Refer to Replacing P.C. Board
on page 54.
Platinum Oxygen
®