Idea ISW-10 SF1-DN1, Installation Manual

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SYSTEM OPERATION AND MAINTENANCE
6.1 SYSTEM DIAGNOSTIC TEST
6.1.1 ELCTRICAL MAINTENANCE
Inspect and handle the electrical connections according to the following items.
1. Complete electrical insulation test: Find unqualified contacts and handle them. The cutouts of control parts or
the air switches should on disconnect state during the test to avoid damage to the control panels by high voltage;
2. Statically check whether the contact of each contactor is flexible and has no jamming;
3. Dust off electrical and control components with a brush or dry compressed air;
4. Check whether the contacts of the contactor contacts with arcing or burning marks. Replace it if needed;
5. Tighten the electrical connection terminals;
6. Check that whether the plug-in quick connector is in good contact. If it is found to be loose, replace the
terminal.
6.1.2 CONTROL MAINTENANCE
Perform visual inspection, simple function detection, and handling the control section according to the
following items.
1. Check the appearance of the power transformer and isolation transformer, and detect the output voltage of
them;
2. Check that it the surface of the control interface board, display control board, sensor board, etc. with aging
phenomenon.
3. Clean dust and dirt on each electrical control component and control panel by brush and electronic dust
remover;
4. Check and tighten the output and input plug interfaces of the control interface board, including the
connection between the display control board & the control interface board, and the connection between the
control interface board & the temperature-humidity sensor board;
5. Check the connection between the user terminal and the control interface board;
6. Check the output connection of the control interface board to each contactor & to the input connection of the
fan overload protector & to high and low voltage switch, etc. Should focus on inspection high-low voltage
switches and electronic expansion valves, etc.. If any loose or poor contact occurs, replace them
immediately;
7. Replace electrical components such as control panels that have been tested for problems;
8. Check the specifications and aging of the power connection, and replace the connection if necessary;