Carrier 40VM Series Service Manual

Also see for 40VM Series: Installation and operating instructions Installation and operating instructions Installation and operating instructions Installation and operating instructions

Contents

68E6: CHECK DC FAN ERROR 11. Error display:IDU display: E62. Applicable models:40VMM, 40VML, 40VMW, 40VMF, 40VMC, 40VMU, 40VMR, 40VMI3. Error definition:DC fan error in IDU -- No fan is detected on the main board, and specific speed difference exists between actual speed andtarget speed.4. Possible causes:• The line from main board to fan motor is loose, disconnected, or improperly connected• Damaged fan motor• Damaged main board of indoor unitPower offPower onIs the blower wheel stuck?Make sure the IDU power supply is correctCheck whether the communication wire isdisconnected or loosened from main board to the motorCheck whether the DC310V power betweenthe red and black lines on the CN24 terminal of main boardof IDU are correct. Check whether the DC15V power between theblack and white lines on the CN24 terminal of main boardof IDU are correct.Replacethe motorReplace the mainboard of IDU, and check whetherthe system operates normallyErrorresolvedErrorresolvedReplace the mainboard of IDUConnect the special motor* to CN24terminal on main board. Power on and operate at low speed.Test whether the system operatesnormally.Replace the mainboard of IDUReconnect the previous motorand power on. Is theE6 fault eliminated?Reconnect the wireRemove obstaclesApply the properYESYESNONONOYESNO NOYESYESYESYESNOwithout a special motor.NOpower supply