Dulas Solar VC150, Handbook

Page: 22 / 156

22
ROUTINE MAINTENANCE
CHECK TEMPERATURE
The temperature the refrigerator should be checked each morning and afternoon.
The temperature must be between 2
0
C and +8
0
C.If the temperature is not within this
range then something is wrong and the vaccines will be unusable. Cnsult the W.H.O.
fault finding and repair of Photovoltaic (provided with each refrigerator).
Check the temperature by placing a thermometer next to the temperature sensor
(situated at the rear of the right hand compartment) and closing the lid. After five
minutes, remove the thermometer, read and record the temperature on a relevant
data sheet.
CHECK LIGHTS
Check that the warning lights on the Photovoltaic charge regulator are not lit, and
that operation is normal. If there is a problem then record this and refer to the
W.H.O. fault finding and repair of the Photovoltaic refrigerators (attached).
DEFROSTING
If there is a build up of ice (5 mm or more) on the walls of the freezer, then it must be
removed by defrosting. The refrigerator can be kept running or cleaned at the same
time.
WARNING: NEVER REMOVE ICE WITH KNIVES OR SHARP OBJECT OR USE
SCOURING POWDER, ABRASIVE CLEANERS OR STEEL WOOL AS THIS WILL
DAMAGE THE METAL PLATING AND CAUSE CORROSION.
1) If the refrigerator is to be cleaned, move the vaccines into another fridge or a
cold box, which can ensure the correct temperature, is sustained throughout the
defrosting process.
2) Switch the freezer OFF (see general Layout diagram)
3) Open the outer Lid, remove the appropriate inner lid, leaving the freezer for at
least 30 minutes to warm up.
4) When possible, remove ice with fingers or wooden /plastic tools.
5) Hand-warm water can be used to assist the defrosting process.
6) Dry the ice compartment after the ice has melted and cleans the vaccine
compartment with soapy water, and then dries it carefully.
7) Clean the outer lid seal (talcum powder can be sprinkled on it prevent it from
sticking).
8) Switch the Freezer backs ON and closes the lid.
9) After 2 hours check the temperature. Wait until the inside temperature has fallen
to between 2
0
C and +8
0
C and the compressor has stopped running continuously.
10) Return the vaccines to the refrigerator and close the lids.
DEFROSTING MUST BE COMPLETED AS QUICKLY AS POSSIBLE TO
PREVENT DAMAGE TO THE VACCINES