CAUTION• If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step 3 above take the following measure:• If the leak stops when the piping connections are tightened further, continue working from step 3.• If the leak does not stop when the connections are retightened, repair the location of leak.• Do not release refrigerant during piping work for installation and reinstallation. Take care of the liquid refrigerant, it may causefrostbite.11.3.5. CONNECT THE CABLE TO THE OUTDOOR UNIT(FOR DETAIL REFER TO WIRING DIAGRAM AT UNIT)1. Remove the control board cover from the unit by loosening the screw.2. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 × 1.5 mm 2 flexible cord,type designation 245 IEC 57 or heavier cord.3. Secure the cable onto the control board with the holder (clamper).4. Cable connection to the power supply (230 - 240V, 50Hz) through knife switch (Disconnecting means).• Connect the approved polychloroprene sheathed power supply cable (3 x 2.5 mm 2 ), type designation 245 IEC 57 or heaviercord to the terminal board, and connect the other end of the cable to knife switch (Disconnecting means).Note: Knife switch (Disconnecting means) should have minimum 3.5 mm contact gap.• Secure the cable onto the control board with the holder (clamper).11.3.6. PIPE INSULATION1. Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Please wrapthe insulated piping end to prevent water from going inside the piping.2. If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by using POLY-E FOAMwith thickness 6 mm or above.60CS-E15DTEW CU-E15DBE / CS-E18DTEW CU-E18DBE / CS-E21DTES CU-E21DBE