User manual LG LRNU09GSPM0

[. . . ] 1 TPI I'ouverture Basculer le bouton rotatif de couleur (situé à droite) sur la position 2 et shunté TP1 pour forcer l'ouverture de la PMVC. TPI I'ouverture Basculer le bouton rotatif de couleur (situé à droite) sur la position 3 et shunté TP1 pour forcer l'ouverture de la PMVD. TPI I'ouverture Couper l'alimentation électrique pour que les vannes restent en ouverture. I'alimentation PRINTED IN JAPAN, July, 1993 @ 1 MULTI AIR CONDITIONER SYSTEMS AND THEIR BASIC COMPONENTS 12 . [. . . ] Is the refrigerant added adequately? 17. Is the remote conlroller normal? 16-3. Test Run Check After completion of the check before the test mn, conduct the test run check with the tollowing steps listed in the check Iist 2. (1) As for the actual procedure of check list 2 (See page 40. 1, simultaneousty rernove the troubles. and (2) More than 12 hours in advance of the test run, turn on the switch lor supplying power to the crankcase heater. In the case that the compressor was not warrned up sufticiently by crank case heater, the cooling or heating operation won't work due to protettive circuit activated. (3) The test run check, in principle, should be rnade for each and every indoor unit. If the multiple units are operating simultaneously, you can not carry on the check for the cross connection between refrigerant piping and contro1wiring. (4) To confirrn cooling and heating operation, operate the unit under the mode within the possible temperature range to operate the units. (5) There are few cases when one of two operation modes is norrnal but the other is not. Make sure to write down the items you have checked. (6) For this check, you need al least a tester and screw driver (+, -). We recornrnend you to prepare a lherrnometer, pressure gauge and other tools (spanners, pliers, nippers, and pins for reset switch. ) Table 16-2 Check list 2 Conflrmatlon Operatlon Procedure Check Iterns C MIC (1 ) MIC (2) amonamom C C C E C C rr=crrrr C 33333333 1. Turn on the power. Is the LED on remote controller blinking?Are Ihe conditions initialized for operation?Is the air flow discharging from air-outlet? 1s there abnormal noise from fan? 2. Flashing of Remote Controller's Operation Lamp When the power is turned on, Ihe remote controller's operation lamp will flash (ON for 0. 5 sec. This is not indicative of a failure or rnalfunction. 16-4-5. PREHEATtDEFROST Flashing In the following cases, "PREHEAT/DEFROST"will flash (at 4 second intervals) on lhe LCD display of the remote controller. This is not indicative of a failure or malfunction. When the cornbination of indoor units exceeds the capacity or when the code number entered by the capacity rank setting switch is incorrect (so that capacity is exceeded). When the indoor unit assigned by the command has been excluded by the operaling mode selector switch. 17. SERVICING PROCEDURES The remote coniroller, multi-controllerand outdoor unit are provided with check displays (remote controller) and LED displays ~microprocessor control PC board) in order to check the operating conditions, and these displays identify the operating status. Given below are the methods which use this self-diagnosis function to identify what is malfunclioning or failing in the air conditioner. ( l )Basically, trouble locations are identified by the check displays on the remote controller. (2) Details o1 trouble in the muiti-controlleror outdoor unit are indicaled by the check LED displays on the muli-controller or interface control PC board. (3) Trouble in the multi-controller is also indicated on the interface PC board in the outdoor unit. This means that trouble in the multi-controller can be identified frorn the outdoor unit as well. This indicates the codes for the trouble in the indoor unit. Note 1: This indicates the codes for the trouble in the heat source unit. [. . . ] Replacement Procedures of the Liquid Tank (1) Rernove the front panel (left and righl side). (M6 x 4, 2 locations, M4 x l ) (2) Purge the refrigerant. (3) Remove the pipe connecled to the liquid tank. (4) Rernove the liquid tank fixing screws. (M6 x 2) (5) Replace the liquid tank. 24-1-6. Replwement Procedures of the Heat Exchanger (1) Rernove the front panel (left and right side). [. . . ]