Service manual

Bair Hugger Model 775 Temperature Management Unit Service Manual

English 202526A

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Overview

When you connect the Bair Hugger Model 775 Temperature Management Unit to a grounded power source,

the unit automatically performs the power-on-reset operation described below� Following the power-on-

reset operation, the unit will enter the Standby mode� You can select any operating mode by pressing the

appropriate button on the unit’s control panel� See Figure 1�

Figure 1. Control panel

Model 775

˚C

STANDBY

TEMP IN

RANGE

FAU LT

OVER

TEMP

AMBIENT

High Fan

Setting

Low Fan

Setting

Temperature Modes

Unit Power-On-Reset

e Bair Hugger Model 775 temperature management unit automatically performs the following power-on-

reset sequence aer you connect the unit to a properly grounded power source:

• Performs all self-test functions�

• Illuminates indicator lights and all pixels in the alphanumeric display momentarily�

• Displays the text “MD 700’s” and the soware revision level in the alphanumeric display�

• Sounds the alarm (three low-level clicks)�

• Enters the Standby mode with the high fan ( ) setting selected by default�

note: e low fan setting indicator light will not illuminate during power up�

If the Bair Hugger Model 775 Temperature Management Unit loses power for less than 1 second, the unit’s

soware will return the unit to the operating mode you selected prior to the power loss� However, if the

temperature management unit loses power for longer than 1 second, the unit’s soware will reset when you

restore power� e unit will then enter the Standby mode with the high fan setting selected by default�