CWS Basic 121-161-201-251

7- TROUBLESHOOTING

7-1 Central unit

Problems to the CWS central unit may be caused by: Lack of cooling water circulation (sea water circuit). Check the seawater circuit outlet. Long running without cooling water may damage the system. It's better to check also the sea water circuit without starting up the con- ditioning system.Problems of main supply (low voltage). Apermanent low voltage supplymay damage the electrical components of the unit and even the com- pressor motor. Do not insist to run the system in low voltage conditions.

7.2 - Fan Coil

The fan coil doesn't run: make sure first that the control panel for boats is properly set to yhe desi- red "Mode" function ("Cool" in summer and "Heat" in winter) and that the thermostat is tur- ned completely to "18" for summer operations and to "24" for winter operations. Then check the connecting plugs. If the plugs are ok, then test the voltage at the plug terminals once the "Max" speed is selected. The voltage between the black and the blue wires must be 230V. If the voltage is correct, then the fan motor is defective and must be replaced. Give to the service every detail about the fan coil and, if possible, about the motor in order to get the correct spare. Be aware that the fan coil motor must run with its specified run capacitor, which is installed in the control box. If there is no voltage, then check the chan- ge over switch and the thermostat on the control panel.
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