3M Bair Hugger 675 - Service Procedures; Installing and Replacing Power Cord; Rolling Cart Removal and Installation

8 3M™ Bair Hugger Model 675 Warming Unit – Service Manual
Diagnostic Mode menu item functionaldescriptions.
FILTER TIMER – Used to view the current filter timer and reset the filtertimer.
CALIBRATION – Used to adjust the temperature offset to calibrate the unit. The
warming unit uses the offset value to account for any temperature variation within the
warming unit and the heat loss through the hose to match the temperature displayed
on the LCD screen with the temperature of the air existing the hose. Calibration is
performed at43°C.
SYSTEM TEST – Used to view sensor, blower speed (RPM), and power information in
detail. The table below details the available tests to run andview.
Test* Action LCD Screen Description
43C
Turns the heater and
blower on and warms
the delivered air to the
43C set point for up to
30minutes
Display xx.x Calibrated hose endtemperature
PCS xx.x
Non-calibrated control
sensortemperature
PMS xx.x Monitor sensortemperature
RPMxxxx Blowerspeed
POWER xxx
Calculated power consumption
based upon heat usage and
dutycycle
170W
Turns the 170W heater
and blower on for
20seconds
340W
Turns the 340W heater
and blower on for
20seconds
PCS xx.x
Non-calibrated control
sensortemperature
PMS xx.x Monitor sensortemperature
RPM xxxx Blowerspeed
680W
Turns the 680W
heater and blower on
for 20seconds
*Depress the Ambient button to interrupt the test and return to the
SYSTEMTESTscreen
OT Test – Used to verify operation of the over-temperature monitoringsystem.
SYSTEM INFO – Used to view system timers and otherinformation.
LCD Screen Description
SYS TIMERhh:mm
Total time the unit has been plugged into a
powersource
OP TIMERhh:mm
Total accumulated time the unit has been running in
Ambient, 32°C, 38°, 43°modes
FIRMWAREx Current firmware version loaded in warmingunit
POWER SUPPLY xx.x
Monitor sensortemperature
Displays the 24volt power supply output involts
FAULT LOG – Displays the most recent 20faults of the warming unit on the LCD
screen in n FCx hh:mmformat.
LCD Screen* Description
1-FC-hh:mm n = Numerical order of fault code in thelog
: FC = Abbreviation for “faultcode”
n-FC-hh:mm x = Code for the faultcondition
:
hh:mm =
OP TIMER time the fault condition occurred,
(hh = hours; mm =minutes)
20-FC-hh:mm
*Depress the 32and 38buttons to scroll through thefaults
BLOWER TIMER – Displays the total time the blower has been active in hh:mm format
(hh = hours; mm =minutes).
Exiting the DiagnosticMode
Exit the Diagnostic mode by pressing the Power button or by waiting 60seconds with
noactivity.
ServiceProcedures
Installing and Replacing the PowerCord
ServiceFrequency
Asneeded
Tools/Equipment
• #2Phillipsscrewdriver
Method
1. Disconnect the warming unit from the grounded powersource.
2. If the warming unit is mounted to a rolling cart, remove the rolling cart
(See “Rolling Cart Removal and Installation”section).
3. Turn the warming unit upside down and support the warmingunit.
4. Remove the screws securing the two power cord clamps inplace.
Power Cord
Power Cord Clamp
Screw Location
Power Cord Clamp ScrewLocation
5. If replacing the power cord, pull the plug of the old cord out of the warming
unit and remove the power cord from the channel leading to the side of the
warmingunit.
6. Insert the plug of the new cord into the unit. (Use only 3Msupplied
powercords).
7. Route the power cord in the channel to the side of the warmingunit.
8. Replace the two power cord clamps to secure the power cord inplace.
9. If the warming unit was attached to a rolling cart, reinstall on the rolling cart
(See “Rolling Cart Removal and Installation”section).
10. Connect the warming unit to a properly grounded powersource.
Rolling Cart Removal andInstallation
ServiceFrequency
Asneeded
Tools/Equipment
• None
Method
1. Disconnect the warming unit from the grounded powersource.
2. Cart Removal: Gently pull on the front tab on the cart, lift the front and rotate
backward to detach the unit off thecart.
System
MODEL
675
CartRemoval