3M Bair Hugger 675, Service Manual

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3M™ Bair Hugger Model 675 Warming Unit – Service Manual
Important Alarm Symbols and Indicators
The Model 675 unit’s visual and audible alarms are classified as Low Priority per
IEC 80601-2-35.
During a fault condition, the warming unit LCD screen will display a fault condition
indicator, the audible alarm will sound and the warming unit will be inoperable (blower
and heater will turn off). The figure below wrench on the LCD screen which indicates
“Stop use: Service required” condition.
“Service Required” Indicator Displayed on LCD Screen
Stop Use:
Service Required
Over-temperature
(Red)
Under-temperature
(Blue)
“Service Required” Indicators
Actions to take when a warming unit encounters alarm:
•
Stop use:
Service required.
•
Audible alarm will sound:
To silence the alarm press the
Power
button.
•
Do not re-start.
Refer to the “Fault Conditions” section for additional information on faults.
Filter time has been reached:
The “Change Filter” indicator will display on the LCD screen when the filter time has
been reached.
“Change Filter”
Indicator
“Change Filter” Indicator Displayed on LCD Screen
Actions to take when filter indicator is illuminated:
• Continue current use.
• After current use: Filter should be changed by service personnel.
• Filter change indicator will stay illuminated, even when the warming unit is in
standby mode.
CAUTION:
Do not attempt to clean the air filter as it may be
contaminated from use. Discard the filter in a manner consistent with
institutional protocol.
Warming Unit Mode Summary
The table below summarizes the warming unit indicators and blower/heater operating states for the different operating modes. Each mode is described in further detail after
the table.
Mode Power Button LCD Screen Temperature Indicators Audible Blower Heater
Power-On-Reset Amber to Green Bair Hugger Logo All on 1 beep Off Off
Operation Green Temperature Selected temperature Off On On
Standby Green Bair Hugger Logo Off Off Off Off
Sleep Amber Blank, Dark Off Off Off Off
Fault Amber Fault Indicator Off 1 beep/sec Off Off
Diagnostic Green Diagnostic menu Off Off Off On for selected test
Unit Power-On-Reset
The Model 675 Warming Unit automatically performs the following sequence after
the warming unit powers on or resets when connected to a properly grounded
power source:
• Performs all self-test functions.
• Illuminates indicator lights and the LCD screen displays the Start-up screen
(Bair Hugger logo).
• The
Power
button indicator illuminates amber and then green.
• Sounds the alarm (1 beep).
• System timer activates.
• The
Power
button indicator illuminates amber and the unit enters the
Sleep mode.
Operation Mode
The warming unit delivers temperature conditioned air during Operation mode. There
are four temperature setting options within Operation mode: Ambient, 32°C, 38°C
and 43°C .
To select the Ambient, 32°C, 38°C, or 43°C temperature, press the button labeled with
the desired temperature setting. The temperature management unit will operate within
the specified temperature range, shown in the table below.
Temperature Setting Temperature of Delivered Air
Ambient
Unit will supply air at room-temperature
32°C
32°C ± 3°C
38°C
38°C ± 3°C
43°C
43°C ± 3°C
After you select an Operation mode temperature setting, the following events occur:
• Corresponding temperature setting indicator light illuminates.
• Blower operates.
• Heater activates except in
Ambient mode.
• Operation timer, blower timer, and filter timer activate.
• System timer remains active.
• The LCD displays the temperature at the hose connection to the blanket.
To exit Operation mode, press the
Power
button. The warming will enter Sleep mode.