Gaymar MEDI-THERM II MTA5900 Series, Руководство по обслуживанию

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k) High Temperature Backup Thermostat Trip Temperatures
[MT590 Test Tool Procedure, cont'd.]
9. An LED should be lit on the face of the MT590 Test Tool to
indicate an open S2 or S3 thermostat. If both LED’s are lit, proceed
to step 12. (Both thermostats have tripped at the same
temperature. This is allowable so long as the water 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.) Otherwise, toggle the corresponding switch S2 or S3 to
the bypass position for whichever LED was lit.
10. Turn machine off.
11. Place machine in service mode 3. If machine still indicates REMOVE
FROM USE NOW / MACHINE SHUTDOWN, then the other thermostat
has 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.) Verify the non-
bypassed LED is lit. Record the temperature. Proceed to step 12.
If the unit enters service mode 3 with no REMOVE FROM USE NOW /
MACHINE SHUTDOWN alarm, then repeat steps 6 through 8 to check
the other thermostat
12. Place both switches S2 and S3 in the bypass position. Turn the machine
off, then turn the machine on and select MANUAL mode. Allow
machine to run for approximately 1 minute. This will circulate cold
water from the reservoir past the thermostats, causing them to reset.
13. Return switches S2 and S3 to the normal position. If unit continues to
be in alarm condition, repeat step 12.
14. While the machine is running in MANUAL mode, place the RFU
CIRCUIT SELECT A-B switch in the “A” position and toggle the TEST
switch. The machine should shut down, blank the displays, light the
REMOVE FROM USE NOW / MACHINE SHUTDOWN LED, flash the
ALERT LED and toggle the audible alarm. Turn the machine off, then
restart the machine in the MANUAL mode.
Repeat the above procedure with the RFU CIRCUIT SELECT switch in
the “B” position.
This step will verify that both (redundant) RFU circuits are
functioning.
15. Turn machine off and unplug the power cord. Disconnect
MT590 Test Tool from wire harness and reassemble machine.
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
26
SERVICE MANUAL
Medi-Therm II