LabRepCo GM-ULT-1786 Owner's Manual
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15Part number 21729, Rev 4Annual calibrationThe control temperature probe should be calibrated once a year. This procedure is described inthe Maintenance Procedures chapter under Calibration.Battery replacementWarning! Only authorized, trained electricians should attempt any access behindthe service panels!The battery is located in the lower left-hand (handle side) corner of the compressorcompartment. It may be accessed by either removing the front or left-side cover panel. Thebattery is secured with two carriage bolts, but it is only necessary to loosen one bolt to removethe battery.Be sure to disconnect the leads from the control box before removing the battery.Door gasket and vacuum relief portAny time that dirt or frost accumulation prevents the door from closing properly, the gasketshould be cleaned with a soft cloth. As a general rule, a minimum of once a month isrecommended.When the door gasket is operating as designed, the only means of pressure equalization for thechamber is the vacuum relief port behind the control panel. The vacuum relief port is equippedwith a built-in heater to reduce frost accumulation, but some frost can accumulate behind theport on the freezer door. It is important to make a visual check for such accumulation wheneverthe door is opened and remove any accumulation found.Defrost1. Switch off the unit breaker switch and disconnect the freezer from power.DISCONNECT battery to avoid deep discharge. To disable the battery, scroll to theCONFIGURE MODE and press ENTER. Scroll to BATTERY BACK-UP ON, and pressENTERUse the UP and DOWN keys to change to OFF, then press ENTER. Upon restart, thisconfiguration will automatically revert to the ON setting |
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