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Table of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Series SLZ
Indoor unit
[Model names]
SLZ-A09AR
SLZ-A12AR
SLZ-A18AR
INDOOR UNIT
ON/OFF
AUTO COOL
HEAT
MODE
REMOTE CONTROLLER
Ceiling Cassettes
[Service Ref.]
SLZ-A09AR.TH
SLZ-A12AR.TH
SLZ-A18AR.TH
h
TOO
TOO
WARM
COOL
FAN
SELECT
VANE
TIME
DRY
RESET
R410A
CONTENTS
1. PART NAMES AND FUNCTIONS ········2
2. SPECIFICATIONS ·································3
3. OUTLINES AND DIMENSIONS ············5
4. WIRING DIAGRAM ·······························7
5. REFRIGERANT SYSTEM DIAGRAM·········8
6. TROUBLESHOOTING ··························9
7. 4-WAY AIR FLOW SYSTEM ···············16
8. DISASSEMBLY PROCEDURE ···········18
9. PARTS LIST ········································21
No. OC302
•This manual does not cover
outdoor units. When servicing
them, please refer to the
service manual No.OC304
and this manual in a set.
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Related Manuals for Mitsubishi SLZ-A09AR
Summary of Contents for Mitsubishi SLZ-A09AR
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Page 1: Table Of Contents
Ceiling Cassettes R410A Series SLZ Indoor unit •This manual does not cover [Model names] [Service Ref.] outdoor units. When servicing them, please refer to the SLZ-A09AR.TH SLZ-A09AR service manual No.OC304 and this manual in a set. SLZ-A12AR.TH SLZ-A12AR SLZ-A18AR.TH SLZ-A18AR CONTENTS 1. -
Page 2: Part Names And Functions
PART NAMES AND FUNCTIONS Indoor Unit SLZ-A09AR.TH SLZ-A12AR.TH Filter SLZ-A18AR.TH 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. -
Page 3: Specifications
Outdoor D.B. 7: W.B. 6: Refrigerant piping length (one way): 5m 1 Measured under rated operating frequency. Specifications and rating conditions of main electric parts INDOOR UNIT Model SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.TH Item Indoor fan capacitor (C1) 1.5+ 440V Fuse (F11) 250V 3.15A... -
Page 4: Noise Criterion Curves
NOISE CRITERION CURVES <50Hz> <50Hz> SLZ-A12AR.TH SLZ-A09AR.TH NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE TERESHOLD OF TERESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS CONTINUOUS NOISE NOISE 1000... -
Page 5: Outlines And Dimensions
OUTLINES AND DIMENSIONS SLZ-A09AR.TH Unit : mm SLZ-A12AR.TH SLZ-A18AR.TH... - Page 6 Unit : mm REMOTE CONTROLLER 17.5 ON/OFF WARM COOL SELECT AUTO COOL VANE TIME HEAT MODE RESET Installation area • Area in which the remote controller is not exposed direct sunshine. • Area in which there is no nearby heating source. •...
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Page 7: Wiring Diagram
WIRING DIAGRAM SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.TH CIRCUIT BREAKER CN29 CND(POWER) (2 PHASE) RT13 CN21 FUSE (LIQUID) GRN/YLW (HEATER) RT12 CN20 POWER SUPPLY (INTAKE) RT11 220-240V 220V ZNR1 CNP(PUMP) 50Hz 60Hz CN31 (DRAIN) TRANS 12VDC DC13.1V FOR A09/12 SKY BLU FAN1(FAN) (1:1 SYSTEM) -
Page 8: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.TH Strainer Heat exchanger Refrigerant GAS pipe connection (Flare) Condenser/evaporator temperature thermistor (RT13) Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection (Flare) Pipe temperature thermistor/liquid Room temperature (RT12) thermistor (RT11) Strainer... -
Page 9: Troubleshooting
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. - Page 10 From the preceding page. Blinking Phenomenon Cause Countermeasure frequency Freezing protection is 1) Short cycle of air cycle 1) Clear obstructions from air cycle. blinking working. 2) Dirty air filter 2) Clean the air filter 3) Damaged fan 3) Check the fan 4) Abnormal refrigerant 4) Check the refrigerant temperature.
- 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. Are there any devices emitting Is the connecting wire between noise near the power supply or the indoor and outdoor units the connecting wire between the...
- Page 12 From the preceding page. The switch of remote controller does not work. Is the connecting Check the followings. Is the varistor on Is the fuse on the •The display on the remote controller does wire between the the indoor controller indoor controller not appear on the screen.
- Page 13 6-3. Test point of indoor controller board Indoor controller board Pipe temperature thermistor/liquid (RT12) Condenser/evaporator Room temperature thermistor (RT11) temperature thermistor (RT13) Drain sensor (DS) • Room temperature thermistor (RT11) • Pipe temperature thermistor/liquid (RT12) • Condenser/evaporator temperature thermistor (RT13) <...
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Page 14: Trouble Criterion Of Main Parts
6-4. Trouble criterion of main parts SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.TH Part name Check method and criterion Room temperature Measure the resistance with a tester. thermistor (Part temperature 10°C ~ 30°C) (RT11) Normal Abnormal Pipe temperature 4.3kΩ~9.6kΩ Opened or short-circuited thermistor/liquid (RT12) - Page 15 <Thermistor Characteristic graph> •Room temperature thermistor (RT11) < Thermistor for lower temperature > Thermistor for •Pipe temperature thermistor/liquid (RT12) lower temperature •Condenser/evaporator temperature thermistor (RT13) Thermistor R =15k' ± 3% Fixed number of B=3480K ± 2% Rt=15exp { 3480( 273+t 15k' 9.6k' 6.3k'...
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Page 16: Way Air Flow System
Burring hole Ceiling surface Drain pipe Electrical Box Refrigerant pipe 7-2. Fresh air intake amount & static pressure characteristics SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.TH Taking air into the unit How to read curves Q … Planned amount of fresh air intake Duct characteristics... - 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.
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Page 18: Disassembly Procedure
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 Figure 1 (1) Slide the knob of air intake grille to the direction of the arrow 1 to open the air intake grille. - Page 19 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 5. Remove the room temperature thermistor (RT11) Photo 4 (1) Remove the panel. (Refer to 3) Connectors (2) Pull out the room temperature thermistor from the drain pan. Drain plug Control box (3) Remove the 2 screws fixed to the control box cover, and remove the control box cover.
- Page 20 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 9. Removing the drain pump (DP) and drain sensor (DS) Photo 7 Cover Screw (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 Control remove the control box cover.
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Page 21: Parts List
PARTS LIST PANEL PARTS SLP-2AL Price Q'ty/set Wiring Recom- Remarks Parts No. Specification Parts name Diagram mended (Drawing No.) Unit Amount SLP-2AL Symbol Q'ty E07 103 003 AIR OUTLET GRILLE E07 103 317 WIRELSS REMOTE CONTROL BOARD E07 103 037 AUTO VANE E07 103 975 CORNER PANEL... - Page 22 FUNCTIONAL PARTS SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.TH ON/OFF WARM COOL SELECT AUTO COOL HEAT VANE TIME MODE RESET...
- Page 23 Q'ty/set Price Wiring Recom- Remarks SLZ- Parts No. Parts name Specification Diagram mended (Drawing No.) Unit Amount Symbol Q'ty AR.TH E07 104 290 BASE E07 104 124 DRUM-1 E07 104 808 LEG-1 E07 105 124 DRUM-2 E07 140 620 INDOOR HEAT EXCHANGER E07 141 620 INDOOR HEAT EXCHANGER E07 142 620...
- Page 24 E07 141 447 INDOOR CONTROLLER BOARD E07 142 447 INDOOR CONTROLLER BOARD HEAD OFFICE : MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. New publication, effective Mar. 2004. Specifications subject to change without notice.