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Control and operation
HICO-VARIOTHERM 550
44
6.2.9.2 System-related
Check the water flow
During operation, check the water flow in the unit and the pad at
regular intervals. The sight glass of the water flow indicator
(15)
features an impeller wheel. With optimal water flow the individual
blades of the impeller are not individually visible.
Carry out function test
During long-term operation check the independent protection
manually at least once every day. For this purpose press the
function test key (17) during operation. The unit now tests the
safety electronics:
•
the alarm sounds
•
the temperature indicators show
•
the yellow fault lamp (13) lights up
•
the display shows FUNCTIONAL TEST.
•
After successful testing the display shows the message
"FUNCTION TEST OK", the unit will automatically resume
normal operation.
If the function test was not completed successfully, the unit
is no longer safe to operate. In this case
► do not use the unit on a patient.
► have the unit inspected by Customer Service.
Checking the temperature control operation
During long-term operation, check the nominal and actual values
of the temperature display regularly; see chapter 6.2.5 and 6.3.2.