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Model 700 Series -40C _______________________________________________________________________Maintenance
Section 4 - Maintenance
4.1 Cleaning the Cabinet Exterior
Avoid the excessive use of water around the con-
trol area due to the risk of electrical shock.
Damage to the controls may also result.
Wipe down the freezer exterior using soap and water and a
general use laboratory disinfectant. Rinse thoroughly with clean
water and dry with a soft cloth.
4.2 Cleaning the Air Filter (minimum of four times a
year)
1. Open the front lower door by grasping the bottom left
corner.
2. Locate the grille on the door. See Figure 1-5. Grasp the
middle of the grille material and gently pull out to
remove.
3. Wash the filter material using water and a mild deter-
gent.
4. Dry by pressing between two towels.
5. Install the filter back into the grille and attach the grille.
Depending upon environmental conditions, the filter may need
to be cleaned or replaced more frequently. If the filter becomes
torn or excessively dirty, a replacement can be purchased from
Thermo. See the exploded parts list, Section 7, for filter part
number. A filter kit (set of 5) is also available.
4.3 Cleaning the Condenser (minimum yearly)
1. Open the front lower door by grasping the bottom left
corner. See Figure 1-5.
2. Using a vacuum cleaner, exercising care to not damage
the condenser fins, clean the condenser.
Depending upon environmental conditions, the condenser may
need to be cleaned more frequently.
Do not use liquids that are corrosive to stainless
steel or the brazing material (copper or nickel).
4.4 Defrosting the Chamber
1. Remove all product and place it in another freezer.
2. Turn the unit off and disconnect it from the power
source.
3. Turn off the battery switch (O). See Figure 4-7.
4. Open all of the doors and place towels on the chamber
floor.
5. Allow the frost to melt and become loose.
6. Remove the frost with a soft cloth.
7. After defrosting is complete, clean the interior with a
non-chloride detergent. Rinse thoroughly with clean
water and dry with a soft cloth.
8. Plug unit in and turn power switch on.
9. Turn the battery power switch to Standby mode ( ).
10. Allow the freezer to operate empty overnight before
reloading the product.
4 - 1
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