Prepare Unit For Storage - Thermo Scientific HERAfreeze HFU Series Operating And Maintenance Manual

Section 5
Maintenance
Check Battery(s)
Prepare Unit for
5-4 HFC Series
All Models except 3 cu ft (Figure 5-1):
1. Locate power switch on the back of the unit. Turn the switch off. (O).
2. Open the lower door on the front left corner of the sidecar. Turn off
the battery switch (O).
3. Remove all the screws from the side panel, except the lower ones. Just
loosen these and lift the panel off.
4. The battery is rectangular in shape, located above the compressor
compartment, to the right and behind the relay box. Remove the three
wingnuts that secure the cover on the battery. Remove the cover.
5. Remove the battery from the mounting bracket.
6. Disconnect the red and black wires from the battery.
7. Use a voltmeter set to DC volts. Matching the wire colors, connect the
meter to the battery.
8. If the voltage reads less than 10.8 volts, replace the battery. If above
10.8, re-install as previously.
9. Re-install side panel. Turn battery power switch to Standby mode ( ),
then close lower door. Turn power switch On.
3 cu ft Models (Figure 5-2):
1. To gain access to the battery, open the lower door by grasping the
bottom left corner. The battery is rectangular in shape, located on the
left sideof the filter compartment.
2. Directly above the battery(s) is the battery power switch. Turn the
battery power switch to the off position (O).
3. Remove the three wingnuts securing the battery cover. Remove cover.
4. Remove the battery from the mounting bracket.
5. Disconnect the red and black wires from the battery.
6. Use a voltmeter set to DC volts. Matching the wire colors, connect the
meter to the battery.
7. If the voltage reads less than 10.8 volts, replace the battery. If above
10.8, re-install as previously.
8. Turn battery power switch to Standby mode ( ).
9. Close lower door.
Defrost the unit as previously described. This prepares the unit for storage.
Turn Off the battery power switch (O). Turn Off the freezer power
Storage
switch.
Note If the unit has been in service, turn it off and disconnect the power
cord connector before proceeding with any maintenance.
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