CHS_LHS

30366461EN-08 15 LU-VE Group reserves the right to change specifications without prior notification. 6 Troubleshooting Fault Possible cause Required action Fan motor not functioning No power supply Check/restore power supply. No control signal (EC motors) Check/restore control signal. Fan blade blocked Remove obstruction. Fan motor burnt - Check for fan blade obstructions. - Check thermal protection device. - Replace fan motor. Excess motor noise Defective fan motor bearing Replace fan motor. Excess vibrations Loose fan fasteners Tighten fasteners. Unbalanced fan blades Replace fan blades. Insufficient capacity Heat exchanger coil dirty/ blocked Clean coil. Coil partly blocked by solid ice - Check defrost cycle settings. - Check defrost heaters. - Perform 100% coil defrost to remove all ice. Fans not (properly) functioning Check fans. Refrigerant supply/pressure insufficient Restore refrigerant supply/ pressure to reference values. Refrigerant leakage Refrigerant containing parts damaged - Stop fans. - Close refrigerant supply. - Repair leak.