Gaymar MEDI-THERM II MTA5900 Series, Руководство по обслуживанию

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k) High Temperature Backup Thermostat Trip Temperatures
[Alternate Shorting Jumper Procedure]
To measure trip points of the high temperature backup thermostats if
you do not have access to an MT590 Test Tool, perform the following
steps 1A-20A. (If you have access to an MT590, follow steps 1-15 on the
preceding pages.)
• Changes to the wiring of the high temperature backup thermo-
stats can defeat their operation. To verify thermostat operation,
perform the
Thermostat Verification Test described in section 7.3,
item l, p. 29 after performing the following test procedure.
• After performing the following test procedure, verify that the
MT590 Test Tool or any installed shorting jumpers have been
removed before returning the machine to patient use.
Failure to do the above may result in death or serious
injury.
7.3 FUNCTIONAL CHECK &
SAFETY INSPECTION
(continued)
FUNCTIONAL CHECK &
SAFETY INSPECTION
WARNING
27
SERVICE MANUAL
Medi-Therm II
1A. Fill machine with distilled water until green band on float stem is
fully visible.
2A. Unplug the power cord.
3A. Remove wraparound (see figure 14, p. 73). Flex side panels of
wraparound out slightly to clear foam.
4A. Remove plastic cover from wiring terminal block TB1.
(See figure 14 for TB1 location.)
5A. Replace wraparound cover. Do not reinstall screws at this time.
6A. Connect test setup as shown in figure 13, p. 72.
7A. Plug the machine in.
8A. Place the machine in service mode 3. Refer to section 8.1, SERVICE
MODES (pp. 34-35) for instructions on how to access service modes.
9A. To insure the correct measurement of thermostat trip point
(because the wraparound was removed), run machine for 15
minutes after the blanket water temperature has reached 105.8°F
(41°C) for models MTA5900 or MTA5901, and 107.6°F (42°C) for
model MTA5942. This allows the inside of the machine to achieve
normal operating temperature.
10A. Enter service mode 4 (see section 8.1, p. 34) from service mode 3.
Mode 4 will cause the machine to heat up until one of the safety
thermostats trip.
11A. Monitor the blanket water temperature. When the ALERT and
REMOVE FROM USE NOW / MACHINE SHUTDOWN LED’s light and
the audible alarm sounds, the temperature on the mercury
thermometer should be within the high temperature limits range. (See
Table 1, p. 25, for high temperature limits with corresponding model
number of your machine.) This indicates that one of the safety
thermostats has tripped. Record th
e thermometer temperature at
which the thermostat tripped on the INSPECTION FORM.