Bair Hugger Security Systems Service Manual download pdf (Page 18)

Bair Hugger Model 775 Temperature Management Unit Service Manual

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Testing the Over-Temperature Detection System

warning

Do not perform the over-temperature detection system test while the temperature management unit is being

used for temperature management therapy� ermal injury may result�

caution

Connect each warming unit being tested to a separate power source�

Service frequency

Every 6 months or 500 hours of use, or whenever service is performed�

Tools/equipment

Model 22110 Temperature Test Unit

Method

note

If continuing from the previous section (Calibrating the Operating Temperature) skip to step 4�

note

If the temperature management unit has been stored at a temperature lower than 20°C, allow it to reach

ambient temperature before beginning the test�

1� Connect the temperature management unit to a grounded power source� e unit performs a self-test

and automatically proceeds to Standby mode�

2� Connect the temperature test kit to the hose of the temperature management unit�

3� Press the Ambient button and allow the temperature management unit to run for 5 minutes�

note

Verify unit is set to the high fan ( ) setting by ensuring the indicator light by the upper fan

is illuminated�

4� Press the Alternative Mode button (See "Figure 2� Location of Alternative Mode button" on

page11) and the 43°C button simultaneously for 3 seconds� e temperature management unit is

now in the Over-Temperature Detection Test mode� In this mode, the temperature management unit

performs the following tasks:

• Blower remains ON�

• Heater elements turn ON at full power�

• 43°C indicator light ashes�

• Over-temperature timer activates�

• “OT Test” ashes in the alphanumeric display�

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Bair Hugger Security Systems Service Manual Page 18