User manual LG LSUT1862QCAEXPORT

[. . . ] 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). In a room where the concentration may exceed the limit, create an opening with adjacent rooms, or install mechanical ventilation combined with a gas leak detection device. [. . . ] · Check the communication connection between indoor and outdoor. · Check the change of remote controller connection (Group / individual) after setup of indoor address. board. E04 -- -- 4 136 E06 E06 No. of indoor units which received signal normally 4 I/F Decreased number of indoor units -- E07 -- -- I/F Indoor/outdoor communication circuit error (Detected at outdoor side) Duplicated indoor addresses All stop Transmission from outdoor to indoor cannot continue for 30 seconds. Multiple indoor unit address setup are duplicated. E08 E08 Duplicated indoor addresses 96 Indoor I/F All stop E09 -- -- 99 Remote Duplicated master remote controller controllers Corresponding In 2-remote controller control unit only stops. (including wireless), both are setup as master (Header indoor unit stops and other indoor unit is operating. ) Corresponding There is any trouble in power unit only stops. line. E10 -- -- CF Indoor unit Communication error between indoor P board assembly . C. · Indoor P board failure . C. Check code Main Outdoor 7-segment display remote Check code Sub-code controller E12 E12 01: Indoor/outdoor communication 02: Between outdoors communication Detected AI-NET position central control remote controller 42 I/F Check code name Status Error detection condition Check item (position) Automatic address start error All stop · When indoor automatic address started, other refrigerant circuit system was setting automatic address. · When outdoor automatic address started, indoor automatic address was executed. Indoor unit is not found when indoor automatic address start was set up. · Setup the address again after disconnecting communication connection with other refrigerant circuit system. E15 E15 -- 42 I/F No corresponding indoor unit during automatic address All stop · Check the communication line connection between indoor and outdoor. · Check the electric power line error in indoor. · Check the noise of surrounding devices. from the outdoor unit which was receiving · Check the power of outdoor unit. (Is the power turned on?) · Check connection of inter-unit wire or disconnection between outdoor units. · Check the connector connection for communication on outdoor P board. · Check outdoor P board (I/F) error. Outdoor header unit received error code from outdoor follower unit. · Check the check code of outdoor follower unit. E28 E28 No. of detected outdoor units d2 I/F Outdoor follower unit error All stop <Convenient functions> When pushing SW04 for 1 second or more under condition that [E28] is displayed on 7-segment display of outdoor header unit, the fan of outdoor unit which stopped abnormally starts rotating. If pushing SW04 and SW05 simultaneously, the fan of normal outdoor unit operates. When pushing SW05 singly, the operation of fan is cleared. E31 E31 01: 02: 03: 04: 05: IPDU1 error IPDU2 error IPDU1, 2 errors Fan IPDU error IPDU1 + Fan IPDU error 06: IPDU2 + Fan IPDU error 07: All IPDU error or communication error between IPDU and I/F P board or outdoor . C. -- CF I/F IPDU communication error All stop Communication of each IPDU (P . C. board) in inverter box interrupted. · Check connection of communication connector and disconnection between IPDU and I/F P board. [. . . ] IC02 Check the operation. IC01 Jumper wire replacement place (J09, 10, 11) IC300 IC301 CN314 CN311 266 17-2-6. Comp-IPDU Board Replacement Procedure Manual This service board is commonly installed in different models before shipment. If the board assembly is to be replaced, replace it properly in accordance with the model, following this procedure manual. <Replacement steps> 1. Turn off the power supply of the outdoor control unit (Turn off the power supply of the outdoor unit). [. . . ]