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k) High Temperature Backup Thermostat Trip Temperatures
[Alternate Shorting Jumper Procedure, cont’d.]
NOTE: If this is the second time the thermostat has tripped
(i.e., if you have previously completed steps 12A to 18A),
proceed to step 19A. Otherwise, proceed to step 12A.
12A.
Turn the machine off and unplug the power cord.
Disconnect hoses.
13A. Remove wraparound cover from machine.
14A. Place a shorting jumper across terminals 7 and 9 of TB1. Reconnect
the machine to the wall outlet, turn it on, and press the
MANUAL
mode button. If the unit indicates
REMOVE FROM USE NOW /
MACHINE SHUTDOWN
proceed to step 15A. If the unit enters
MANUAL
mode with no
REMOVE FROM USE NOW / MACHINE
SHUTDOWN
alarm, then proceed to step 17A.
15A.
Turn the machine off and unplug the power cord.
Remove
shorting jumper from terminals 7 and 9 of TB1 and reconnect across
terminals 7 and 10.
16A. Plug machine in and turn it on. Press the
MANUAL
mode button. If the
machine still indicates a
REMOVE FROM USE NOW / MACHINE
SHUTDOWN
alarm, then both thermostats have tripped at the same
temperature. This is allowable so long as the water temperature at
the TPT9 was within the high temperature limits range. (See Table 1,
p. 25 for high temperature limits with corresponding model number
of your machine.) If both thermostats have tripped, proceed to step
19A. If the unit enters
MANUAL
mode with no
REMOVE FROM USE
NOW / MACHINE SHUTDOWN
alarm, then proceed to step 17A.
17A.
Turn the machine off and unplug the power cord.
Replace
wraparound cover. Reconnect hoses from test setup to machine (see
figure 13, p. 72).
18A. Repeat steps 7A through 11A.
19A.
Turn the machine off and unplug the power cord.
Disconnect
supply hose from TPT9 and allow water to gravity drain into a
container for approximately one minute. This will circulate cold water
from the reservoir past the thermostats, causing them to reset. Do
not install a second shorting jumper. Reconnect supply hose to TPT9
and return drained water to machine reservoir.
20A. Remove wraparound cover from machine. Remove shorting jumper.
Replace plastic terminal block cover. Replace wraparound cover and
reinstall screws.
Verify that the MT590 Test Tool or any installed shorting
jumpers have been removed before returning the machine to
patient use.
Failure to do so may result in death or serious injury.
7.3 FUNCTIONAL CHECK &
SAFETY INSPECTION
(continued)
FUNCTIONAL CHECK &
SAFETY INSPECTION
WARNING
28
SERVICE MANUAL
Medi-Therm II
