OC302-1.qxp 04.3.17 11:49 AM Page 1 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS No. OC302 TECHNICAL & SERVICE MANUAL Series SLZ Ceiling Cassettes R410A Indoor unit [Model names] [Service Ref.] SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.TH SLZ-A09AR SLZ-A12AR SLZ-A18AR •This manual does not cover outdoor units. When servicing them, please refer to the service manual No.OC304 and this manual in a set.
OC302-1.qxp 1 04.3.17 11:49 AM Page 2 PART NAMES AND FUNCTIONS Indoor Unit SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.TH Filter Remove dust and pollutants from inhaled air Horizontal Air Outlet Sets airflow horizontal automatically during cooling or dehumidifying. Grille Auto Air Swing Vane Disperses airflow up and down and adjusts the angle of airflow direction. Air Intake Inhales air from room.
04.3.17 11:49 AM 2 Page 3 SPECIFICATIONS Indoor model SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.TH Cooling Cooling Heating Cooling Heating Heating Single phase Single phase Single phase Power supply 230V, 50Hz 230V, 50Hz 230V, 50Hz Capacity Air flow (High/Med./Low) K /h 660/600/540 600/540/480 660/600/540 Power outlet A 20 10 10 Running current ✽1 A 0.24 0.18 0.23 Power input Rated frequency W 53 40 52 Dew prevention heater (kW) 0.014 0.014 0.
OC302-1.qxp 04.3.17 11:49 AM Page 4 NOISE CRITERION CURVES <50Hz> <50Hz> SLZ-A09AR.TH NOTCH SPL(dB) Hi 38 Me 35 Lo 32 LINE SLZ-A12AR.TH 80 70 NC-70 60 NC-60 50 NC-50 40 NC-40 30 NC-30 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC-20 OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar) OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.
118 [73.
OC302-1.qxp 04.3.17 11:49 AM Page 6 Unit : mm REMOTE CONTROLLER 57 17.5 h 140 ON/OFF TOO WARM TOO COOL FAN SELECT VANE TIME AUTO COOL HEAT DRY MODE RESET D B A C Installation area • Area in which the remote controller is not exposed direct sunshine. • Area in which there is no nearby heating source. • Area in which the remote controller is not exposed to cold (or hot) winds.
04.3.17 11:49 AM 4 Page 7 WIRING DIAGRAM SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.TH CIRCUIT BREAKER L I.
OC302-1.qxp 5 04.3.17 11:49 AM Page 8 REFRIGERANT SYSTEM DIAGRAM SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.
OC302-1.qxp 04.3.17 11:49 AM 6 Page 9 TROUBLESHOOTING 6-1. Cautions on troubleshooting (1) Before troubleshooting, check the followings: 1Check the power supply voltage. 2Check the indoor/outdoor connecting wire for mis-wiring. (2) Take care the followings during servicing. 1 Before servicing the air conditioner, be sure to first turn off the remote controller to stop the main unit, and then turn off the breaker.
OC302-1.qxp 04.3.17 11:49 AM Page 10 From the preceding page. Blinking frequency Phenomenon Cause Countermeasure 3 Freezing protection is blinking working. 1) Short cycle of air cycle 2) Dirty air filter 3) Damaged fan 4) Abnormal refrigerant 1) Clear obstructions from air cycle. 2) Clean the air filter 3) Check the fan 4) Check the refrigerant temperature. 5,7,10 Malfunction of outdoor unit blinking Malfunction of outdoor unit Refer to the TECHNICAL & SERVICE MANUAL of outdoor unit.
OC302-1.qxp 04.3.17 11:49 AM Page 11 Check of indoor controller board and indoor fan motor Operation lamp blinks once in a fixed period. Error was found in the signal transmitted or received between the indoor and outdoor units. Is the connecting wire between the indoor and outdoor units connected properly? No Are there any devices emitting noise near the power supply or the connecting wire between the indoor and outdoor units? Yes No Yes Connection is defective. Remove the devices.
OC302-1.qxp 04.3.17 11:49 AM Page 12 From the preceding page. The switch of remote controller does not work. No Is the connecting wire between the indoor unit and the decoration panel connected Is the varistor on the indoor controller board burnt? Yes Yes Yes Connection is defective. Is the fuse on the indoor controller board melted? No Replace the varistor. No Check the followings. •The display on the remote controller does not appear on the screen.
04.3.17 11:49 AM Page 13 6-3. Test point of indoor controller board Indoor controller board Pipe temperature thermistor/liquid (RT12) Condenser/evaporator temperature thermistor (RT13) Room temperature thermistor (RT11) Drain sensor (DS) • Room temperature thermistor (RT11) • Pipe temperature thermistor/liquid (RT12) • Condenser/evaporator temperature thermistor (RT13) < Thermistor for lower temperature > 50 Power supply input 220-240V AC 40 Resistance (K") OC302-1.qxp Fuse 250V AC 3.
OC302-1.qxp 04.3.17 11:49 AM Page 14 6-4. Trouble criterion of main parts SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.TH Part name Check method and criterion Room temperature thermistor (RT11) Measure the resistance with a tester. (Part temperature 10°C ~ 30°C) Pipe temperature thermistor/liquid (RT12) Condenser/evaporator temperature thermistor (RT13) Normal Abnormal 4.3kΩ~9.6kΩ Opened or short-circuited Measure the resistance between the terminals with a tester.
04.3.17 11:49 AM Page 15 Thermistor for lower temperature •Room temperature thermistor (RT11) •Pipe temperature thermistor/liquid (RT12) •Condenser/evaporator temperature thermistor (RT13) < Thermistor for lower temperature > 50 40 Rt=15exp { 3480( 0: 10: 20: 25: 30: 40: 1 273+t Resistance (K") Thermistor R0=15k' ± 3% Fixed number of B=3480K ± 2% 1 )} 273 15k' 9.6k' 6.3k' 5.2k' 4.3k' 3.
OC302-1.qxp 7 04.3.17 11:49 AM Page 16 4-WAY AIR FLOW SYSTEM 7-1. Fresh air intake (Location for installation) At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when required. Fresh air intake Detail drawing of fresh air intake 25 [100 [73.4 Cut out hole 0° 12 12 0° 118 3-[2.8 hole Burring hole Ceiling surface Refrigerant pipe Electrical Box Drain pipe 7-2.
OC302-1.qxp 04.3.17 11:49 AM Page 17 7-4. Fixing of horizontal vane Horizontal vane of each air outlet can be fixed according to the environment, which is installed. Setting procedure 1) Turn off a main power supply (Turn off a breaker). 2) Disconnect the vane motor connector of the direction of the arrow with pressing the unlocking button as shown in figure below. Electricity insulate the disconnected connector with the vinyl tape.
OC302-1.qxp 8 04.3.17 11:49 AM Page 18 DISASSEMBLY PROCEDURE SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.TH Be careful on removing heavy parts. OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 1. Removing the air intake grille (1) Slide the knob of air intake grille to the direction of the arrow 1 to open the air intake grille. (2) Remove the hook for secure belt on air inlet grille from the panel. (3) Slide the shaft in the hinge to the direction of the arrow 2 and remove the air intake grille.
OC302-1.qxp 04.3.17 11:49 AM Page 19 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 5. Remove the room temperature thermistor (RT11) (1) Remove the panel. (Refer to 3) (2) Pull out the room temperature thermistor from the drain pan. (3) Remove the 2 screws fixed to the control box cover, and remove the control box cover. (4) Remove the connector (CN20) from the indoor controller board, and disconnect the room temperature thermistor. 6. Remove the drain pan (1) Remove the panel.
OC302-1.qxp 04.3.17 11:49 AM Page 20 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 9. Removing the drain pump (DP) and drain sensor (DS) (1) Remove the panel. (Refer to 3 ) (2) Remove the drain pan. (Refer to 6) (3) Remove the 2 screws fixed to the control box cover, and remove the control box cover. (4) Remove the connectors of the (CNP) and the (CN31) from the indoor controller board. (5) Remove the 1 screw fixed to the cover, and remove the cover.
OC302-1.qxp 04.3.17 11:49 AM 9 Page 21 PARTS LIST PANEL PARTS SLP-2AL 10 9 8 3 2 7 1 4 5 6 Q'ty/set No. Parts No.
OC302-1.qxp 04.3.17 11:49 AM FUNCTIONAL PARTS SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.
OC302-1.qxp 04.3.17 11:49 AM No. Page 23 Parts No. Parts name 1 E07 104 290 BASE Q'ty/set SLZSpecification A09 A12 A18 AR.TH 1 1 1 2 E07 104 124 DRUM-1 1 1 1 3 E07 104 808 LEG-1 2 2 2 4 E07 105 124 DRUM-2 1 1 1 E07 140 620 INDOOR HEAT EXCHANGER Remarks (Drawing No.
OC302-1.qxp 04.3.17 11:49 AM Page 24 ELECTRICAL PARTS SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.TH 6 TO OUTDOOR UNIT N 2 POWER SUPPLY N L 220-240V 3 220-240V~ 5 1 2 3 4 1 E07 140 340 COMPRESSOR CONTACTOR Q'ty/set SLZSpecification A09 A12 A18 AR.TH 1 1 1 2 E02 127 382 FUSE 250V 3.15A No. Parts No. Parts name Remarks (Drawing No.
