VC50SDD Installation &
Technician’s Manual
Page 35 of 46
Section 2. How to check that the Dulas PV array is working
1.
Switch the PV isolator off (indicated by a “0”)
2. Disconnect the PV cables from the refrigerator.
3. Connect the supplied test leads to a suitable multimeter as shown in photograph.
4. Connect the PV cables to the test leads.
5. Measure the PV array open circuit voltage. This should be more than 24V but less than
45V.
6. Measure the PV array short circuit current. This will depend on the light level on the array.
In bright sun each module will produce up to 9A of current. 2 modules will produce 18A and
so forth
Caution:
Make sure that the current rating of the meter can withstand the likely current.
The current measurement should be made quickly and the wires disconnected to prevent
the meter from overheating.
The compressor will need a current of at least 2A to start.
7. When checking is complete and the array is working correctly disconnect the PV cables
from the meter and reconnect them to the refrigerator.
