SECTION 4—TROUBLESHOOTING
19
Perfecto
2
™
Unit not operating: Alarm:
On or Off
Internal Status Indicators:
RED: Two Flashes
GREEN: Four Flashes Or
RED: Two Flashes GREEN:
Five Flashes
P.C. board Failure.
Replace P.C. board.Refer to Replacing P.C.
Board on page 59.
Low Concentration: NOTE:
Check for O
2
purity using a
calibrated Oxygen Analyzer
at Test Point 1 (oxygen
outlet) of the concentrator.
Internal Status Indicators:
RED: Two Flashes
GREEN: One Flash73%
Shutdown Control Panel
Indicators: SensO
2
ONLY:
RED: On
YELLOW: Off
GREEN: Off
For SensO
2
units, the RED
indicator will signal extremely
low purity and will be
accompanied by a continuous
audible alarm and a system
shutdown. Repairs are
required.
Cabinet filters dirty.
Clean or replace. Refer to Cleaning the
Cabinet Filter on page 24, Replacing the
Outlet HEPA Filter on page 25, and
Replacing the Compressor Inlet HEPA
Filter on page 26.
Compressor inlet filter dirty.
Replace inlet filter. Refer to Replacing the
Compressor Inlet HEPA Filter on page 26.
Compressor:
a. Defective.
b. Faulty capacitor.
c. Bad motor windings.
d. Worn seals.
e. Bad bearings.
f. Leak at fittings or tubing.
g. Leaky or defective relief valve.
h. Insufficient voltage (outlet).
a. Replace compressor. Refer to
Replacing Compressor Assembly on
page 32.
b. Replace capacitor. Refer to Replacing
c. Replace compressor.
d. Rebuild top end of compressor. Refer
to Rebuilding the Thomas Model
2660 Compressor on page 35.
e. Replace compressor.
f. Replace fittings or tubing.
g. Replace relief valve.
h. DO NOT use extension cords.
Heat exchanger:
a. Leak at tubing or body chamber.
b. Inspect tubing and heat
exchanger.
a. Replace or retighten.
b. Replace or retighten tubing. Replace
heat exchanger. Refer to Replacing
Heat Exchanger Assembly on
page 52.
Regulator cracked or leaking.
Replace. Refer to Replacing Regulator on
page 49.
Exhaust muffler dirty or plugged.
Replace. Refer to Replacing the Muffler
Assembly on page 27.
Fan:
a. Not operating. Unit overheating.
b. Faulty fan.
a. Leads to fan disconnected.
Reconnect.
b. Replace.Refer to Replacing Cooling
Sieve beds defective.
Replace. Refer to Checking Sieve Bed
Pressure on page 86.
Tubing kinked or blocked.
Repair or replace.
SYMPTOM
PROBABLE CAUSE
SOLUTION
