Bair Hugger Security Systems Service Manual download pdf (Page 14)

Bair Hugger Model 775 Temperature Management Unit Service Manual

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Alternative Modes

e Bair Hugger Model 775 temperature management unit has 5 alternative modes that allow access to the

service and calibration utilities of the unit (see Figure 2 on page 11)�

Alternative Modes Description

AltMode0 Hour Meter

AltMode1 Calibration

AltMode2 Fault Code Log

AltMode3 System Information

AltMode4 Over-temperature Detection Test

e Hour Meter mode displays the cumulative amount of operating time (in Ambient, 32°C, 38°C, and 43°C

modes) the temperature management unit has been in use� e time is displayed in whole hours only�

e Calibration mode allows a technician to check and adjust the hose end sensor calibration� is should

be done as part of routine maintenance and aer servicing the temperature management unit or replacing

the hose� e hose end sensor temperature can be altered a maximum of ±3�0°C by adjusting the calibration

oset value� In the Calibration mode, the temperature management unit operates in the Ambient temperature

mode, and the alphanumeric display shows the current hose end sensor temperature and calibration oset

with 0�1°C precision�

e Fault Code Log mode sequentially displays the last 5 fault codes stored in system memory� Please refer to

the "Fault Code Table" on page17 for more information about a particular fault code�

e System Information mode allows the technician to view important system information including the

rmware, system identication, serial port baud rate, 5V power supply status, and the control board serial

number�

e Over-temperature Detection Test mode allows the user to test the operation of the independent over-

temperature shutdown system�

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Bair Hugger Security Systems Service Manual Page 14