(table 2, pp. 16-17). Plot these values on table
2, page 18.
Verify that the
REMOVE FROM USE
light is lit.
15. Thermostat trip acceptance
Both thermostats must trip within the
acceptance window (see table 2, p. 18).
If this condition is not met, do not put the
Power Unit in service. Contact your dealer for
assistance.
16. Unplug the power unit.
Open the enclosure
to allow the Power Unit to cool for 5-10
minutes.
17. Locate the two patient limit thermostats (item
17, fig. 11, pp. 26). Reset S2 by gently
pressing the center reset button.
Use care when resetting the
thermostats.
Excessive force
(force greater than 5 pounds) can
damage the overtemp protection
device and/or inadvertently alter
the trip temperature of the device.
NOTE: Use care when resetting the
thermostats since the power terminals are
delicate. Avoid flexing the terminals.
Thermostats with loose terminals should
be replaced and retested.
18. Press the center reset button of S3. Verify it
has reset (indicated by an audible "click" and
tactile feedback). If it "clicks", proceed to
step 19.
If you don't hear a "click", then what was
assumed to be the patient limit thermostat S3
tripping was actually the heater overtemp
thermostat S4 in the same circuit. This will
rarely occur. If it has occurred, proceed as
follows:
a. Remove the filter retainer and nut.
Remove the filter. Jumper out the S4
thermostat. Replace the filter, filter
retainer and nut.
b. Run the Power Unit for 5 to 10 minutes
in the
46°C
setting.
c. Bypass S2 by placing the
THERMOSTAT BYPASS
switch in the S2
position. Place the
HEAT/OVERTEMP
Switch to
OVERTEMP
. Allow the Power
Unit to operate. When the air
temperature reaches 48°C, start the
stopwatch.
d. Allow the Power Unit to heat until the
S3 thermostat indicator is lit. Stop the
stopwatch and note the highest
temperature displayed. This is the
upper limit temperature for the S3
thermostat. Record the elapsed time
and temperature.
e. Verify that the
REMOVE FROM USE
light is lit.
f.
The S3 thermostat must trip within the
acceptance window (see table 2, p.
18). If this condition is not met, do not
put the Power Unit in service. Call
Gaymar's Technical Service
Department for assistance (see back
cover for telephone numbers).
g. Unplug the Power Unit.
h. Open the enclosure and allow the
Power Unit to cool for 5-10 minutes.
i.
Remove the filter retainer and nut.
Remove the filter. Remove the jumper
from the S4 thermostat. Press the S4
reset button and insure it is reset.
Replace the filter, filter retainer, and
nut.
j.
Reset both the S3 and S2 thermostats
by pressing their center reset buttons.
(The S2 thermostat may have
retripped.)
19. Remove the TC20 Test Tool.
After performing the preceding test
procedure, verify that the TC20 Test
Tool and all jumpers have been
removed before returning the Power
Unit to patient use.
Failure to do so
may result in death, serious injury, or
equipment malfunction.
20. Proceed to the
FILTER SWITCH TEST
(section 7.6, p. 14).
Section 7 - Functional Check and Safety Inspection (cont’d)
11
WARNING
WARNING
