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SYMPTOM:
POWER LOSS, Continued:
INTERNAL POWER LOSS
SENSO2:
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, power light on,
compressor not operating.
HIGH PRESSURE:
Internal Status Indicators:
RED: On GREEN: Off
( LX Control Board )
RED: One (1) Flash
GREEN : Two (2) Flashes
(Integrated Sensor Board)
(LX SMT Board)
Control Panel Indicators:
RED: On YELLOW: Off
GREEN: Off
Unit plugged in, power switch on,
continuous alarm. Compressor shut
down.
NOTE: REFER TO THE REPAIR/REPLACEMENT GUIDE IN THIS MANUAL FOR PROPER
TROUBLESHOOTING GUIDE
PROBABLE CAUSE:
4. Circuit breaker.
Tripped.
5. P.C. Board.
a. Damaged.
b. Loose or damaged connector.
1. Transformer Assembly.
a. Faulty.
b. Connector loose or discon-
nected.
c. Faulty wiring.
2. P.C. Board.
Faulty.
1. P.C. Board.
a. Malfunction.
b. Disconnected Wire.
c. Shifting Valve at Pressures
greater than 25 p.s.i.
2. 4-way Valve
a. Not Shifting.
REPLACEMENT OR ADJUSTMENT PROCEDURES
TROUBLESHOOTING GUIDE
4. Reset breaker.
NOTE: Breaker may trip to safe-
guard concentrator during a
power surge. If breaker trips
immediately, there is a probable
short in the unit. Check for
pinched or charred wires. If the
breaker does not trip, run unit for
approximately 2 hours. If breaker
trips again, there is an internal
problem. Contact INVACARE
TECHNICAL SERVICE.
5a.Replace (PROCEDURE 11).
5b.Repair or replace connector.
1a.Replace (PROCEDURE 12).
1b.Reattach connector.
1c.Replace Transformer Assembly
2. Replace P.C. Board (PROCE-
DURE 11). For 5LX or 6LX -
Unit may require retiming after
P.C. Board replacement (PRO-
CEDURE 18).
1a.Set flow to max l/min. for concen-
trator. Check voltage across
Pilot Valve 1 on 200 volt scale. If
meter reads 0 volts when
unit is turned on, replace P.C.
Board (PROCEDURE 11).
1b.Check spade connectors on pilot
valves 1 and 2 and connectors
on P.C. Board.
1c.Replace P.C. Board (PROCE-
DURE 11). For 5LX or 6LX -
Unit may require retiming after
P.C. Board replacement (PRO-
CEDURE 18).
2a.If voltage rises to approximately
24 volts D.C. when unit
shuts down, P.C. Board is func-
tioning
4-way Valve (PROCEDURE 16).
15
SOLUTION:
(PROCEDURE 12).
properly.
Replace
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