Page 3 - Piping
33 1 TECHNICAL CHANGES MUZ-D30NA MUZ-D30NA - U1 MUZ-D36NA MUZ-D36NA - U1 MUY-D30NA MUY-D36NA 1. New model PART NAMES AND FUNCTIONS 2 MUZ-D30NA MUY-D30NA Piping Air outlet Drain hose Drain outlet Air inlet (back and side) MUZ-D36NA MUY-D36NA
Page 4 - SPECIFICATION
44 3 SPECIFICATION Item Model MSZ-D30NA MSY-D30NA MSZ-D36NA MSY-D36NA Capacity Rated(Minimum~Maximum) Cooling 1 Btu/h 30,700 (9,800 ~ 30,700) 30,700 (9,800 ~ 30,700) 32,000/33,200 (9,800 ~ 32,000) / (9,800 ~ 33,200) 33,200/34,600 (9,800 ~ 33,200) / (9,800 ~ 34,600) Heating 47 1 Btu/h 32,600 (8,700 ~...
Page 5 - Test condition; OPERATING RANGE
55 Test condition ARI Mode Test Indoor air condition Outdoor air condition Dry bulb (°F) Wet bulb (°F) Dry bulb (°F) Wet bulb (°F) SEER (Cooling) "A" Cooling Steady State at rated compressor Speed 80 67 95 (75) "B-2" Cooling Steady State at rated compressor Speed 80 67 82 (65) "B...
Page 6 - REQUIRED SPACE; OUTLINES AND DIMENSIONS
6 Open as a rule20 inch or more ifthe front and bothsides are open 4 inch or more /8 inch or more if there are obstaclesto both sides Open as a rule20 inch or more if the back,both sides and top are open 14 in . or more 4 in . or more REQUIRED SPACE 6 OUTLINES AND DIMENSIONS 4 Unit: inch MUZ-D30NAMU...
Page 7 - WIRING DIAGRAM
Page 9 - REFRIGERANT SYSTEM DIAGRAM
99 6 REFRIGERANT SYSTEM DIAGRAM Unit:inch MUZ-D30NAMUZ-D36NA MUY-D30NAMUY-D36NA Outdoor heat exchanger Flared connection Defrost thermistor RT61 Service port Service port Discharge temperature thermistor RT62 Flared connection Stop valve Stop valve (with service port) Capillary tube Refrigerant flow...
Page 10 - MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
10 Max. length A Max. Height difference B Indoorunit Outdoor unit MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE Model Refrigerant piping : ft. Piping size O.D : in. Max. Length A Max. Height difference B Gas Liquid MUZ-D30NAMUZ-D36NAMUY-D30NAMUY-D36NA 100 50 5/8 3/8 ADDITIONAL REFRIGERAN...
Page 11 - DATA
11 DATA 7 MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA 7-1. PERFORMANCE DATA 1) COOLING CAPACITY Model Indoor air Outdoor intake air DB temperature ( ˚ F) IWB 75 85 95 105 115 ( ˚ F) TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC MUZ-D30NA 71 37.6 19.1 3.43 35.2 17.8 3.75 33.0 16.7 4.04 30.7 15.6...
Page 12 - Cooling; Heating
12 12 7-2. PERFORMANCE CURVE 65 70 75 75 70 65 45 40 35 30 25 20 15 Indoor intake air DB temperature (°F ) = 848 CFM Airflow 15 25 35 45 55 Outdoor intake air WB temperature (°F) 4.0 3.6 3.2 2.8 2.4 Indoor intake air DB tem perature (°F) To tal power consumption (kW) To tal capacity (1 0 3 Btu/h) 65...
Page 16 - -5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY
16 7-5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY MUZ-D36NA Capacity correction factors Input correction factors Input correction factors Capacity correction factors Correction of Cooling capacity The operational frequency of compressor Correction of Cooling total input The operatio...
Page 18 - ACTUATOR CONTROL; -3. Relation between main sensor and actuator
18 8 ACTUATOR CONTROL MUZ-D30NAMUZ-D36NAMUY-D30NAMUY-D36NA 8-3. Relation between main sensor and actuator Sensor Purpose Actuator Compressor LEV Outdoor fan motor R.V. coil Indoor fan motor Discharge temperature thermistor Protection ○ ○ Indoor coil temperature thermistor Cooling : Coil frost preven...
Page 19 - SERVICE FUNCTIONS
19 SERVICE FUNCTIONS 9 MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA 9-1. PRE-HEAT CONTROL If moisture gets into the refrigerant cycle, or when refrigerant is lique fi ed and col- lected in the compressor, it may interfere the start-up of the compressor. To improve start-up condition, the compressor is en...
Page 20 - TROUBLESHOOTING; Before troubleshooting, check the following; components for bursting and discoloration.; Lead wiring
20 10 TROUBLESHOOTING 10-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following 1) Check the power supply voltage.2) Check the indoor/outdoor connecting wire for miswiring. 2. Take care of the following during servicing 1) Before servicing the air conditioner, be sure to turn ...
Page 21 - Outline of the function
21 Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (10-3.) disappears, the memorized failure details can be recalled. This mode is very useful when the unit needs to be repa...
Page 22 - Operational procedure
22 Does left lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0.5 seconds?Blinks: The outdoor unit is abnormal. Beep is emitted at the same timing as the blinking of the left lamp of OPERATION INDICATOR lamp. 2 Yes (Blinks ) No (OFF) The outdoor unit might be abnormal.Con...
Page 27 - MUZ
27 10-4. TROUBLE CRITERION OF MAIN PARTS MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA Part name Check method and criterion Figure Defrost thermistor (RT61) ( MUZ ) Ambient temperature thermistor (RT65) Outdoor heat ex- changer temperature thermistor (RT68) Measure the resistance with a tester. Refer to 1...
Page 28 - A How to check inverter/ compressor
28 OPERATION / INDICATOR lamp flashes 5-times.Outdoor unit does not operate. 10-5. TROUBLESHOOTING FLOW Measure the voltage between each lead wire leading to the compressor.U (BLK) - V (WHT) V (WHT) - W (RED) W (RED) - U (BLK) Is voltage output on right table? Yes No Disconnect the terminal of the c...
Page 29 - B Check of outdoor thermistors
29 OPERATION INDICATOR lamp flashes 6-times.Thermistor is abnormal. Thermistor Symbol Connector, Pin No. Board Defrost ( MUZ ) RT61 Between CN661 pin1 and pin2 Outdoor electronic control P.C. board Discharge temperature RT62 Between CN661 pin3 and pin4 Outdoor heat exchanger temperature RT68 Between...
Page 31 - Outdoor unit does not operate.; D Check of outdoor fan motor
31 Fan motor does not operate or stops operating shortly after starting the operation. Is the resistance between each ter- minal of outdoor fan motor normal? (Refer to 10-4.) Check the connection between the connector CN931 and CN932. Disconnect CN932 from outdoor electronic control P.C. board, and ...
Page 33 - H How to check miswiring and serial signal error
33 • Unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch. Indoor unit does not operate.• OPERATION INDICATOR lamp flashes ON and OFF in every 0.5 seconds. Outdoor unit doesn’t operate. Outdoor electronic control P.C. board Blinking Lighted (Parts side) LED2 LED1 Tu...
Page 34 - The operation frequency does not go up from lowest frequency.; I Check of HPS
34 1. Disconnect the connector CN681 in the electronic control P.C. board.2. Check the resistance of HPS 1 minute after the outdoor unit power supply was turned OFF. Check the resistance between each terminal. Is HPS protection displayed immediately after compressor starts? Replace HPS. Replace the ...
Page 35 - J Electromagnetic noise enters into TV sets or radios
35 J Electromagnetic noise enters into TV sets or radios Yes Is the unit grounded? No Ground the unit. Yes Is the distance between the antennas and the indoor unit within 9.91 ft., or is the distance between the antennas and the outdoor unit within 9.91 ft.? No Extend the distance between the antenn...
Page 38 - Outdoor power board; Connect to the earth
38 MUZ-D30NA MUZ-D36NA MUY-D30NA MUY-D36NA 3. Outdoor power board 294-370 VDCOutput Connect to the compressorVoltage among phases: 180 V Connect to the earth CN5Primary current detection(Connect to the noise filter) CN2 Connect to the controller board (+)1-5(–): Signal transmission (To electronic co...
Page 39 - Removing the cabinet; Photo 2; DISASSEMBLY INSTRUCTIONS
39 OPERATING PROCEDURE PHOTOS 1. Removing the cabinet (1) Remove the screws of the service panel.(2) Remove the screws of the top panel.(3) Remove the screw of the valve cover.(4) Remove the service panel.(5) Remove the top panel.(6) Remove the valve cover.(7) Remove the screws of the cabinet.(8) Re...
Page 40 - power board; Screws of the relay panel; Photo 6; Propeller
40 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, P.C. board and power board (1) Remove the top panel, cabinet, service panel and the back panel. (Refer to 1.) (2) Disconnect the following connectors; <Electronic control P.C. board> CN931 and CN932 (Fan motor)CN795 (LEV)CN661 (D...
Page 41 - (5) Pull out the outdoor heat exchanger temperature thermistor; Removing outdoor fan motor
41 OPERATING PROCEDURE PHOTOS 4. Removing the defrost thermistor (MUZ), discharge temperature thermistor, outdoor heat exchanger temperature thermistor and ambient temperature thermistor (1) Remove the top panel, cabinet, service panel and the back panel. (Refer to 1.) (2) Disconnect the following c...
Page 42 - Removing the compressor and 4-way valve; Recover gas from the pipes until the pressure; Removing the reactor; Welded parts of 4-way valve
42 OPERATING PROCEDURE PHOTOS 6. Removing the compressor and 4-way valve (1) Remove the top panel, cabinet, service panel and the back panel. (Refer to 1.) (2) Remove the inverter assembly. (Refer to 2.)(3) Remove the R.V. coil. (Refer to 3.)(4) Recover gas from the refrigerant circuit. NOTE: Recove...
Page 44 - Copyright 2008 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD; TM
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2008 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Feb. 2008. No. OBH502 7Made in Japan New publication, effective Feb. 2008Specifications subject to change without notice. TM