Invacare Platinum 5 Service Manual page 19

SYMPTOM
HIGH PRESSURE:
Internal Status Indicators:
RED: One Flash
GREEN: Two Flashes
Unit plugged in, power
switch on, continuous
alarm. Compressor shut
down.
Part No 1110538
PROBABLE CAUSE
P.C. board:
a. Malfunction
b. Disconnected wire.
c. Shifting valve at pressures greater
than 25 p.s.i. for Platinum 5 and XL;
29 PSI for Platinum 10.
4-way Valve:
a. Not shifting.
b. Bad coil.
c. Coil resistance.
SECTION 4—TROUBLESHOOTING
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 66.
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 73.
b. Replace 4-way valve. Refer to
Replacing 4-Way Valve on page 73.
c. Coil should read 80 ohm ± 10.
19
SOLUTION
Platinum™Series