User manual LG 76082

[. . . ] Suffocation from leakage of R410A is almost non-existent. With the recent increase in the number of high concentration buildings, however, the installation of multi air conditioner systems is on the increase because of the need for effective use of floor space, individual control, energy conservation by curtailing heat and carrying power etc. Most importantly, the multi air conditioner system is able to replenish a large amount of refrigerant compared with conventional individual air conditioners. If a single unit of the multi conditioner system is to be installed in a small room, select a suitable model and installation procedure so that if the refrigerant accidentally leaks out, its concentration does not reach the limit (and in the event of an emergency, measures can be made before injury can occur). [. . . ] Check disconnection, connector contact error. (When two remote controllers operate) · Check remote controller P board. . C. · · · · · E02 -- -- -- Remote Remote controller sending error controller Indoor unit Communication error between indoor and remote controller (Detected at indoor side) Indoor unit Indoor/outdoor communication circuit error (Detected at indoor side) Corresponding Signal could not be sent from · Check the communication wire of remote controller: Exchange remote controller. · Check remote controller and communication adapter wiring. Corresponding No communication from unit only stops. remote controller (including wireless) and communication adapter. Corresponding Indoor unit does not receive unit only stops. · · · · · · · · · · Check power-ON order of indoor/outdoor. Check inter-unit cabling between indoor and outdoor. Check outdoor end terminal resistance setup (SW30-2). (Power-ON) Check connection of communication line between indoor and outdoor. follower units · Check cable of the remote controller. The outdoor unit connected with communication cable between indoor and outdoor (U1. U2) is the outdoor unit. · Check connection of communication line between indoor and outdoor. · Check outdoor P board(I/F) error. . C. 125 E19 E19 00: No header unit 02: Two or more header units 96 I/F All stop · There are multiple outdoor units in 1 line. · There is none of outdoor unit in 1 line. E20 E20 01: Connection of outdoor of other line 02: Connection of indoor of other line -- 42 I/F Other line unit connected during automatic address Communication sending error between outdoor units Duplicated outdoor follower address setup Decreased number of connected outdoor units Outdoor follower unit error All stop Unit of other line was connected when indoor automatic Separate the cable between lines according to automatic address started. address setup method in "Address setup". E23 E23 15 I/F All stop Transmission of other outdoor unit was unavailable for 30 seconds or more. Outdoor addresses manually set up are duplicated. The signal was not returned for constant from the outdoor unit which was receiving signal. Outdoor header unit received error code from outdoor follower unit. In this model, only one outdoor unit is provided to one refrigerant line. Be sure to check there is no communication connection with outdoor unit in the other refrigerant line. [. . . ] Comp-IPDU Board Replacement Procedure Manual This service board is commonly installed in different models. If the board assembly is to be replaced, replace it properly in with the correct version for the model and follow this procedure. Replacement steps 1. Turn off the power supply to the outdoor unit. Confirm that the capacitor has been fully discharged (confirm that the voltage between CN13 and CN15 is 0 V). [. . . ]