Dulas VC150SDD, Инструкция по установке и руководство техника

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VC150SDD Installation & Technician’s Manual
Page 39 of 47
There is no LED to indicate when the freezer compressor is running but a good indication is given
by the sound of the air circulating fan inside the freezer compartment. This only operates when the
compressor is running.
The freezer thermostat is set very low (about -19C) to ensure that the freezer is as cold as
possible for as much time as possible. When water packs at room temperature are put into the
freezer, the freezer temperature will rise until the packs are frozen.
Testing the freezer control.
The temperature of the freezer depends upon the time of day, the amount of sunlight, and the
number of water packs that have been put into it that day.
To test the freezer control
Firstly test the freezer compressor using the procedure in Section 3. The internal fan in the freezer
should start when the compressor is running. Next test that the fridge control is working correctly
using the methods in the table above. Then:

Turn the freezer off using the freezer switch.

Put some water packs in with water at room temperature and leave them in until the freezer
temperature is 15 degrees C or above.
 Remove the ice packs, replace the foam lid and turn the freezer on. If there is sufficient
sunshine the freezer will run.

The freezer temperature should drop to below -zero degrees C within one or two hours.
Once the temperature drops below -18C the freezer compressor and fan should turn off.
They will then cycle on and off to maintain the -18C temperature.
If the freezer compressor and fan fail to start check the freezer sensor connections to the
control board and the connections from the control board to the compressor controller.
Replacing the Dulas SDD controller
Switch the PV isolator off and disconnect the PV cables. Make a note of the orientation of the SDD
controller. Unplug the connectors to the circuit board and prise back the white plastic clips on each
edge of the board to release it from the refrigerator chassis.
Install the replacement board with the same orientation. Plug in the cables to the controller,
reconnect the PV and switch on. If the refrigerator is working replace the metal cover over the
controller.