User manual LG LFX25971ST

[. . . ] SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indoor Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Outdoor Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Operation Characteristic Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] DC18V YES Are two remote controllers set without master unit?Defect Replace YES Correct as a master unit/a sub unit (Remote controller address connector) Check remote controller P. C. Defect Replace [E09 error] Are two remote controllers set without master unit?NO YES Correct as a master unit/a sub unit (Remote controller address connector) Check remote controller P. C. Defect Replace ­ 55 ­ [E04 error] NO Does outdoor unit operate?YES NO Is setup of group address correct?YES NO Are 1, 2, 3 inter-unit cables normal?YES Are connections from connectors of inter-terminal blocks (1, 2, 3) of indoor/outdoor units normal?YES Does voltage between 2 and 3 of inter-terminal blocks (1, 2, 3) of indoor unit vary?* YES NO Check indoor P. C. Defect Replace NO Correct connection of connector. Check item code [14]. * As shown in the following figure, perform measurement within 20 seconds after power ON. YES NO Are characteristics of TA sensor resistance value normal?NO Correct connection of connector. ­ 58 ­ [P12 error] <Only for 4-way air discharge cassette type models> Turn off the power. Are not there connections errors or disconnection on connectors CN333 and CN334 of indoor unit P. C. NO Remove connectors CN333 and CN334 of indoor unit P. C. board (MCC-1402). YES Correct connection of connector. Does the fan rotate without trouble when handling the fan with hands?YES Are resistance values between phases at fan motor connector CN333 motor side of indoor P. C. *1 YES NO Replace indoor fan motor. NO Replace indoor fan motor. *1 · Are not coil windings between 1 (Red lead) and 3 (White lead), between 3 (White lead) and 5 (Black lead), between 5 (Black lead) and 1 (Red lead) opened or shorted? For resistance, see the following values. 70 to 100 NO Replace indoor fan motor. Is resistance value of fan motor connector CN333 at motor side of indoor P. C. *2 YES *2 Check resistance of fan motor position detection circuit. Is not coil winding between 1 (Yellow lead) and 4 (Pink lead) opened or shorted?5 to 20k NO Replace indoor fan motor. Is signal output of indoor fan motor position detection correct? [. . . ] 5) While holding the heat exchanger, remove fixing band and fixing screws (Ø4 × 10, 3 pcs. ) and then remove the heat exchanger. Remarks Piping cover 2. Attachment 1) Mount parts in order, heat exchanger fixing band piping cover drain pan bell mouth electric parts box as original. 3 screws NOTE) Arrange wires as original. 2) Attach the removed connectors and wires as original. 3) Connect the refrigerant pipe as original, and then perform vacuuming. Fixing band Fixing band for heat exchanger <Details of sensor lead wire drawing> TCJ sensor (Black) TC sensor (Red) 2 fixing screws for heat exchanger Wind pipe cover over the header, attach a sensor on it. [. . . ]