Page 2 - FEATURES; High–speed cooling & heating; Extra energy – savings
2 1 FEATURES MSZ09UN MUZ09UNMUZ12UN LCD wirelessremote controller MSZ12UN High–speed cooling & heating Ideal and comforting performance is assured by controlling compressorrotation according to the cooling and heat load of a room. Inverter tech-nology promotes maximum compressor efficiency by fl...
Page 3 - Model; The height of indoor unit has been shortened.
3 “I FEEL CONTROL” IN OUR LCD WIRELESS REMOTE CONTROLLER WITH ON/OFF PROGRAM TIMER Mitsubishi Electric’s new wireless remote controller incorporates a number of advanced features that provides even greatercontrol and ease-to-use. It has a liquid crystal display which indicates such information as mo...
Page 4 - PART NAMES AND FUNCTIONS; INDOOR UNIT; Operation section; OUTDOOR UNIT
4 PART NAMES AND FUNCTIONS 2 INDOOR UNIT MSZ09UN Operation section Emergency operation switch Horizontal vane Air filter Deodorizing filter(option)(gray sponge type) Vertical vanes Air inlet Grille Remote controlreceiving section Remote controller Air cleaning filter(option)(white bellows type) Fron...
Page 6 - SPECIFICATION
6 SPECIFICATION 3 NOTE : Test conditions are based on ARI 210/240. ❈ 1 : Rating conditions (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB) Rated frequency: Hz (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB Rated frequency: Hz ❈ 2 : (heating) — Indoor : 70˚FDB, 60˚FWB, ...
Page 7 - Test condition
7 Indoor unit w Max. Height difference 25ft. Outdoor unit Refrigerant Piping Max.length A w Height difference should be within 25ft. regardless of which unit, indoor or outdoor position is high. MAX. HEIGHT DIFFERENCE Outside diameter Minimum Wall thickness Outside diameter Minimum Wall thickness MS...
Page 8 - DATA; ) COOLING CAPACITY CORRECTIONS
8 DATA 4 Model Indoor air Outdoor intake air DB temperature(˚F) 71 67 63 71 67 63 10.8 10.2 9.6 14.0 13.2 12.4 6.1 7.1 8.0 8.3 9.7 10.7 0.87 0.82 0.78 1.01 0.96 0.91 10.1 9.5 8.9 13.1 12.3 11.5 5.7 6.7 7.4 7.8 9.0 9.9 0.96 0.91 0.87 1.11 1.05 1.01 9.5 8.8 8.3 12.3 11.4 10.7 5.4 6.2 6.9 7.3 8.3 9.3 1...
Page 13 - POWER SUPPLY; Control voltage
13 POWER SUPPLY ✻ Control voltage 4-4. STANDARD OPERATION DATA MSZ09UN INDOOR UNIT 115V 1phase 60Hz, 2 wires OUTDOOR UNIT 208/230V 1phase 60Hz, 2 wires SIGNAL WIRE 2 wires 12V DC 208/230V 1phase 60Hz, 3 wires 115V INDOOR UNIT OUTDOOR UNIT SIGNAL WIRE 2 wires 12V DC 115V 1phase 60Hz, 2 wires Disconne...
Page 15 - (1) GUARANTEED VOLTAGE
15 The standard data contained in these specifications apply only to the operation of the system under normal conditions. Sinceoperating conditions vary according to the areas where these units are installed. The following information has been providedto clarify the operating characteristics of the ...
Page 16 - Correction of total input; Correction of Cooling capacity; Correction of total input; Cooling capacity
16 0 50 100 150(Hz) 0.0 0.5 1.0 1.5 Correction of Cooling capacity Capacity correction factors The operational frequency of compressor MUZ09UN Correction of total input Input correction factors The operational frequency of compressor 0 50 100 150(Hz) 0.0 0.5 1.0 1.5 MUZ09UN 0 50 100 150(Hz) 0.0 0.5 ...
Page 17 - Correction of Heating capacity; Heating capacity
17 0 50 100 150(Hz) 0.0 0.5 1.0 1.5 Correction of Heating capacity Capacity correction factors The operational frequency of compressor Correction of total input Input correction factors The operational frequency of compressor 0 50 100 150(Hz) 0.0 0.5 1.0 1.5 MUZ09UN MUZ09UN 0 50 100 150(Hz) 0.0 0.5 ...
Page 18 - OUTLINES AND DIMENSIONS
18 OUTLINES AND DIMENSIONS 5 MSZ09UN INDOOR UNIT 6-3/8 3/4 2-5/16 Wireless remote controller 4-5/8 3-1/4 2-5/8 3-1/16 32-3/16 33-1/2 6-1/2 24-3/4 2-1/4 1/4 or more 3-15/16 1-5/8 1/8 1-5/8 10-1 1/16 3/16 9-1/8 3-1/4 6-5/8 12-13/16 12-13/16 3/16 7-7/16 Air in Air out Insulation [ 1-1/8 Drain hose [ 5/...
Page 19 - REQUIRED SPACE
19 MUZ09UN MUZ12UN Even if the right/left sidesor back side are vacant, thetop has to be at least 4 in.unobstructed. REQUIRED SPACE Even if the right/left sides or back sideare vacant, the front has to be at least 4 in. unobstructed. 14 in. or more 4 in. or more 4 in. or more Basically unobstructed ...
Page 20 - WIRING DIAGRAM; MODEL WIRING DIAGRAM
20 WIRING DIAGRAM 6 MSZ09UN MODEL WIRING DIAGRAM INDOOR UNIT TAB12 POWER FROM OUTDOOR UNIT CONNECTING WIRES TO OUTDOOR UNIT CONNECTING WIRE SUPPLY115V1 phase60Hz CN201 RT12 RT13 121 CN CN211 CN112 TO OUTDOOR UNIT CONNECTING WIRES 12V DC 5 F11 VLT 1- 3+ 5 3 REMOTECONTROLLER MV POWER MONITOR,RECEIVERP...
Page 21 - MC; MODELS WIRING DIAGRAM
21 OUTDOOR UNIT GROUND FROM INDOOR UNITCONNECTING WIRES12V DC TO INDOOR UNITCONNECTING115V1 phase 60Hz FROM INDOOR UNIT POWERSUPPLY208/230V1 phase 60Hz L63 TB1 L62 CY62 CY61 CY63 CY64 P.C. BOARD NOISE FILTERP.C. BOARD CT61 DS62 T801 TB2 SSR61 RELAY X61 F901 C65 X64 DSA61 NR61 R64 DS61 R T64 L61 C61 ...
Page 22 - REFRIGERANT SYSTEM DIAGRAM
22 REFRIGERANT SYSTEM DIAGRAM 7 RoomTemperature thermistorRT11 Sub indoor coilthermistorRT13 Main indoor coilthermistorRT12 Refrigerant pipe { 3/8 (with heat insulator) Flared connection Stop valve(with service port) Stop valve(with strainer) Fusibleplug Serviceport Serviceport Muffler Muffler 4-way...
Page 23 - MICROPROCESSOR CONTROL; lighted; Operation state; Operation Indicator; INDOOR UNIT DISPLAY SECTION
23 MICROPROCESSOR CONTROL 8 lighted not lighted Approx. 4 ˚F or more Difference between target temperature and room temperature Approx. 4 ˚F or less This shows that the air conditioner is operating to reach the target temperature. Please wait until the target temperature is obtained. This shows that...
Page 25 - Coil frost prevention
25 8-1-1. COOL mode of “I FEEL CONTROL” 1. Indoor fan speed control Indoor fan operates at the set speed by FAN SPEED CONTROL button.In AUTO the fan speed is as follows. MSZ09UN Initial temperature difference Room temperature minus set temperature : 3 degrees or more·································...
Page 27 - Indoor fan speed control; Coil frost prevention
27 8-1-3. HEAT mode of “I FEEL CONTROL” 1. Indoor fan speed control (1) In AUTO the fan speed is as follows. Set temperature minus room temperature: 4 degrees or more ··········································HighSet temperature minus room temperature: Between 2 and 4 degrees· ······················...
Page 28 - High pressure protection
28 NOTE : When the thermostat(compressor) turns on, the indoor fan operates at set speed. But until cold air preventionand warm air control is released, the indoor fan followsthem. (4) Flow soft control When the thermostat (compressor) is off, the indoor fan operates as follows. < RT12 > < ...
Page 29 - Time chart of defrosting in HEAT mode (reverse type); ON
29 Time chart of defrosting in HEAT mode (reverse type) set position set position set speed Indoor fan Compressor normal Outdoor fan R.V. coil (21S4) OFF ON OFF MAX. 79Hz (MSZ12UN) MAX. 80Hz (MSZ09UN) horizontal Horizontal vane Very Low (temperature of indoor coil thermistor > 64 ° F) 30 seconds ...
Page 30 - Outdoor fan motor control
30 8-2. COOL OPERATION (1) Press OPERATE/STOP(ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with the OPERATION SELECT button.(3) Press the TEMPERATURE buttons. (TOO WARM or TOO COOL button) to select the desired temperature.The setting ra...
Page 31 - (1) Rotational frequency feedback control; Rotational frequency; In COOL and DRY operation
31 8-6. AUTO VANE OPERATION (1) Vane motor drive These models are equipped with a stepping motor for the horizontal vane. The rotating direction, speed, and angle ofthe motor are controlled by pulse signals (approx. 12V) transmitted from indoor microprocessor. (2) The horizontal vane angle and mode ...
Page 32 - PROGRAM TIMER
32 (7) SWING MODE By selecting SWING mode with the VANE CONTROL button, the horizontal vane swings vertically. The remote controller displays “ ”. (8) Cold air prevention in HEAT operation. When any of the following conditions occurs in HEAT operation, the horizontal vane angle changes to Angle 1 au...
Page 33 - Outline drawing of main power supply
33 Press once <Cool> Press again <Heat> Press once again <Stop> OPERATION INDICATOR lamp EMERGENCY OPERATIONswitch EMERGENCY OPERATIONswitch • The following indication applies regardless of shape of the indicator. 8-8. EMERGENCY-TEST OPERATION In case of test run operation or emerg...
Page 35 - -10. Operational frequency control of outdoor unit
35 1Hr Time: T Maximumfrequency Frequency Rating or under rating frequency w The maximum frequency in COOL mode varies according to operation hours as shown below. w However, it is under rating frequency when indoor fan speed is set to MANUAL Low or AUTO Low. Applied model MSZ09UN minimumfrequency r...
Page 36 - How to determine the optimal voltage
36 8-11. Optimal voltage control The purpose of optimal voltage control is to operate the compressor at optimal voltage that meets the load detected by the power factor of the compressor.1. Optimal As shown on the right the efficiency (ratio of output against input) of themotor in the compressor bec...
Page 38 - LEV opening degree
38 MSZ09UNIn COOL mode, the two indoor coil thermistor (one main and one sub) sense temperature ununiformity (super heat)at the heat exchanger, And when temperature difference have developed, the indoor coil thermistors adjust LEVopening to get approximate 16 degrees lower temperature than the targe...
Page 39 - SERVICE FUNCTIONS; Jumper wire; Table 1
39 SERVICE FUNCTIONS 9 MSZ09UNMSZ12UN MUZ09UNMUZ12UN 9-1. CHANGE IN DEFROST SETTING <JS> When the JS wire of the outdoor electronic control P.C. board is cut, the defrost temperature will be changed. (Refer to page 58.) Jumper wire Change point Deforst finish temperature changes from 55 ° F to...
Page 40 - power button of the remote controller is off.; How to release “AUTO RESTART FUNCTION”; Turn off the main power for the unit.; Operation
40 9-4. AUTO RESTART FUNCTION When the indoor unit is operated with the remote controller, the signals of the operation mode, the set temperature, and the fan speed are sent from the indoor electronic control P.C. board and memorized in the auto restart assembly. When the main power is turned off an...
Page 41 - TROUBLESHOOTING; Troubleshooting procedure; the components for bursting and discoloration.; How to replace batteries; Weak batteries may cause the remote controller malfunction.; RESET button; Lead wiring
41 TROUBLESHOOTING 10 3. Troubleshooting procedure 1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality. To make sure, check how many times the abnormality indication is flashing on and off before starting service work. 2) Before servic...
Page 43 - Troubleshooting check table; flashing; OPERATION INDICATOR lamp flashing.
43 1. Troubleshooting check table Operation Indicator flashing · Flashing of the OPERATION INDICATOR lamp (on the left-hand side) indicates possible abnormalities.· The OPERATION INDICATOR lamp (on the left-hand side) is lighted during normal operation. • The following indication applies regardless ...
Page 45 - Trouble criterion of main parts; Motor part
45 Measure the resistance between the terminals with a tester. (Part temperature14°F ~ 104°F) Measure the resistance between the terminals with a tester. (Part temperature 50°F ~ 86°F) Compressor(MC) Part name Indoor fanmotor(MF) INNER FUSE262 I 4°F CUT OFF Motor part Sensor part Check method and cr...
Page 47 - Check of open phase
47 Be sure to use the analog voltmeter for measurement.With the connector between compressor and IPM disconnected, activate the inverter and measure the balance of voltage between terminals. << Operation method>> Start heating operation by pressing the EMERGENCY OPERATION switch on the i...
Page 49 - Check of indoor fan motor
49 Check of indoor fan motor G When OPERATION INDICATOR lamp flashes 3-time.Indoor fan does not operate. Turn OFF the power supply.Check connector (Fan motor) visually. Repair or replace the indoor fan motor. Disconnect lead wires from connector (Fan motor).Measure resistance between lead wires No.1...
Page 50 - Check of remote controller and receiver P.C. board; OK
50 Check of remote controller and receiver P.C. board H Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote controller. Yes Yes Yes No Yes Yes Yes No No Replace the batteries.(Refer to page 41.) Turn on a radio to AM and press switch onthe remote con...
Page 52 - Cooling operates when heating is expected.; Check of outdoor fan motor; Outdoor fan motor does not work.
52 Disconnect the connector between the compressor and transistor module.Turn ON the power supply to indoor unit, and press twice (heating) the EMERGENCY OPERATION switch. Measure resistance of the R.V. coil to check if it is defective or not.If the connector CN 721 is not connected or the R.V. coil...
Page 53 - Check of power supply; Inverter does not work.; Check of rush current limiting circuit; Outdoor unit does not operate.
53 Check of power supply M Inverter does not work. Check of rush current limiting circuit N Outdoor unit does not operate. Replace the current limiting resistor (R64). When the current limiting resistor is open, the rush current limiting relay may not be working properly. Therefore confirm the limit...
Page 55 - How to check mis-wiring and serial signal error
55 How to check mis-wiring and serial signal error P Turn OFF the power supply. Turn ON the power supply. Turn ON the EMERGENCY OPERATION switch. (any mode possible) Make sure the unit emits a beep tone. Replace the outdoor electronic control P.C.board. ❈ Press OPERATE/STOP(ON/OFF) button on theremo...
Page 61 - DISASSEMBLY INSTRUCTIONS; OPERATING PROCEDURE; Photo 1
61 DISASSEMBLY INSTRUCTIONS 11 11-1. MSZ09UN INDOOR UNIT (1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector is a terminal with lock mechanism 1 Slide the sleeve. 2 Pull the terminal while pushing the locking lever. 1 Hold the sleeve, and pull out ...
Page 62 - Photo 5
62 OPERATING PROCEDURE PHOTOS Photo 5 Drain hose Screws ofthe vanemotor Vane motor Conduit cover Screws of theconduit plate Photo 3 Photo 4 3. Removing the electrical box (1) Remove the front panel. (Refer to 1.)(2) Remove the electrical cover. (Refer to 2.)(3) Disconnect the connector of the indoor...
Page 63 - Photo 6; Screws of the fan motor; Removing the line flow fan and the indoor fan motor; (4) Remove the hexagon socket set screw from the line flow
63 OPERATING PROCEDURE PHOTOS Photo 6 Photo 7 Screws of the fan motor Indoor coilthermistor Screws fix-ing the leftside of theheatexchanger 5. Removing the line flow fan and the indoor fan motor (1) Remove the front panel. (Refer to 1.)(2) Remove the electrical box. (Refer to 3.)(3) Pull out the dra...
Page 64 - Front panel; Removing the front panel; (2) Pull the panel down to your side slightly and unhook the; Photo 2
64 11-2. MSZ12UN INDOOR UNIT OPERATING PROCEDURE PHOTOS Photo 1 Front panel Screws 1. Removing the front panel (1) Remove the screw caps at the bottom of the front panel. Remove the screws. (2) Pull the panel down to your side slightly and unhook the catches at the top. Photo 2 2. Removing the elect...
Page 65 - Catch
65 OPERATING PROCEDURE PHOTOS 5. Removing the indoor fan motor and the line flow fan (1) Remove the front panel. (Refer to 1.)(2) Remove the electrical box.(3) Unhook the catch on the both sides of the nozzle assembly. (4) Remove the nozzle assembly.(5) Remove the screws of the bearing support.(6) R...
Page 67 - Removing the propeller and the outdoor fan; NOTE; Before using the torch, reclaim gas from the pipes until the
67 OPERATING PROCEDURE PHOTOS 6. Removing the propeller and the outdoor fan motor (1) Remove the cabinet. (Refer to 1.)(2) Remove the propeller nut.(3) Remove the propeller.NOTE : Loose the propeller in the rotating direction for removal.When attaching the propeller, align the mark on the propeller ...
Page 68 - PARTS LIST; REMOTE CONTROLLER; Symbol
68 PARTS LIST 12 MSZ09UN (W)12-1. INDOOR UNIT STRUCTURAL PARTS 12-2. ACCESSORY AND REMOTE CONTROLLER 12-2. ACCESSORY AND REMOTE CONTROLLER 12-1. INDOOR UNIT STRUCTURAL PARTS 123456789 INSTALLATION PLATEBOX(W)CORNER BOX LEFT (W)FRONT PANEL ASSEMBLY(W)SCREW CAP(W)GRILLE(W)CATCH (W)AIR FILTERCORNER BOX...
Page 70 - Part number that is circled is not shown in the illustration.; Optional parts
70 MSZ12UN (W)12-5. INDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration. 12-5. INDOOR UNIT STRUCTURAL PARTS 12-6. ACCESSORY AND REMOTE CONTROLLER 12-6. ACCESSORY AND REMOTE CONTROLLER 1234567 INSTALLATION PLATEBOX(W)FRONT PANEL ASSEMBLY(W)GRILLE(W)SCREW CAP(W)AI...
Page 71 - Part numbers that are circled are not shown in the illustration.
71 MSZ12UN (W)12-7. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 12-8. INDOOR UNIT HEAT EXCHANGER 12-7. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 12-8. INDOOR UNIT HEAT EXCHANGER Symbol in Wiring Diagram Q'ty/unit Remarks Part No. NO. Part Name MSZ12UN (W) E02 141 302E02 001 504E02 141 ...
Page 72 - 2-9. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS
72 MUZ09UN MUZ12UN 12-9. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 1 13 14 9 6 5 4 2 3 16 17 8 7 10 15 12 11 Part numbers that are circled are not shown in the illustration. TOP PANELFRONT PANELGRILLEPROPELLER BASECOMPRESSORSTOP VALVE (GAS)STOP VALVE (GAS)STOP VALVE (LIQUID)SERVICE PANELBAC...
Page 73 - ELECTRICAL PARTS
73 MUZ09UN MUZ12UN 12-10. OUTDOOR UNIT ELECTRICAL PARTS 12 10 11 9 1 8 2 3 4 7 6 5 Part numbers that are circled are not shown in the illustration. SMOOTHING CAPACITORREACTORRELAY P.C. BOARDNOISE FILTER P.C. BOARDR.V. COILFIN TEMPERATURE THERMISTORTHERMISTOR SETPOWER-FACTOR CAPACITORTERMINAL BLOCKTE...
Page 74 - OPTIONAL PARTS; DO NOT reuse AIR CLEANING FILTER even if it is washed.; Additional
74 OPTIONAL PARTS 13 Air cleaning filter (White bellows type) 13-2. AIR CLEANING FILTER ● AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity. ● Normal life of AIR CLEANING FILTER is 4 months. However, when it becomes dirty, replace it as soon as possible. ● ...
Page 76 - Copyright 2002 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD; TM
New publication, effective Feb. 2004Specifications subject to change without notice. C C Copyright 2002 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Feb. 2004. No.OB297 REVISED EDITION-A 7Distributed in May 2002. No.OB297 23 TM OB297--3.qxp 04.2.4 4:23 PM Page 76
Page 77 - 400 Lawrenceville Suwanee Road; Specifications are subject to change without notice.
3400 Lawrenceville Suwanee Road ● Suwanee, Georgia 30024 Toll Free: 800-433-4822 ● Toll Free Fax: 800-889-9904 www.mrslim.com Specifications are subject to change without notice.
