Page 2 - Use the speci; Never use any refrigerant other than that specified.; Errors in TROUBLESHOOTING have been corrected.
2 Revision A : • RoHS PARTS LIST has been added. • Failure mode recall function (11-2.) has been changed. • Check of HPS (11-6. ) has been corrected. Revision B: • Compressor has been changed. ( MUZ-GA50/60VA ) PreviousNew ModelSNB130FLDHSNB130FLDH1 PARTS LIST numberE02 851 900E02 939 900 RoHS PARTS...
Page 3 - TECHNICAL CHANGES; Refrigeration; INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT
3 1 TECHNICAL CHANGES Refrigeration oil Refrigerant New refrigerant R410A HFC-32: HFC-125 (50%: 50%) Pseudo-azeotropic refrigerant Not included A1/A1 72.6 -51.4 1.557 64 Non combustible 0 1730 From liquid phase in cylinder Possible Incompatible oil NonNon Previous refrigerant R22 R22 (100%) Single r...
Page 4 - Tools dedicated for the air conditioner with R410A refrigerant; Compressor
4 -30 -20 -10 0 10 20 30 40 50 60 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 (MPa [Gauge]) R410A R22 Conversion chart of refrigerant temperature and pressure Saturated liquid pressure NOTE: The unit of pressure has been changed to MPa on the international system of units (SI unit system). The conversi...
Page 5 - Refrigerant piping
55 Electronic scale for refrigerant charging Outdoor unit Refrigerant gas cylinderoperating valve Refrigerant gas cylinderfor R410A with siphon Refrigerant (liquid) Service port Gauge manifold valve (for R410A) Union Liquid pipe Gas pipe Stop valve Indoor unit Charge hose (for R410A) R410A Pipe diam...
Page 6 - PART NAMES AND FUNCTIONS; ACCESSORIES; SPECIFICATION
6 PART NAMES AND FUNCTIONS 2 Air inlet Piping Air outlet (back and side) Drain hose Drain outlet ACCESSORIES Drain socketDrain cap Ø33 12 E1 E2 E3 Single phase 230V,50Hz 20 7.46 0.30 SNB130FLDH or SNB130FLDH1 850 U-V 0.45 W-U 0.45 V-W 0.45 RC0J60-AA BLK-WHT 15.2 WHT-RED 15.2 RED-BLK15.2 840x850x330 ...
Page 7 - NOISE CRITERIA CURVES; Model; Specifications and rated conditions of main electric parts
7 NOISE CRITERIA CURVES 4 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC-60 NC-50 NC-40 NC-30 NC-20 NC-70 BAND CENTER FREQUENCIES, Hz APPROXIMATETHRESHOLD OF HEARING FORCONTINUOUSNOISE OCT A VE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA OUTDO...
Page 8 - OUTLINES AND DIMENSIONS; REQUIRED SPACE
8 5 OUTLINES AND DIMENSIONS Unit: mm MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA 30° 35° 155 90 198 40 515 299 66 34 51 330 360 850 430 500 80 121 840 Open as a rule500 mm or more ifthe front and bothsides are open 100 mm or more 200 mm or more if there are obstaclesto both sides Open as a rule500 mm or more i...
Page 9 - WIRING DIAGRAM; MF; MC
9 WIRING DIAGRAM 6 R64B YL W 230V~ 12-24V CN912 CN663 WHT BLU NOISE FIL TER P. C.BOARD BRN T O INDOOR UNIT CONNECTING RED S3 RT 65 21 CN61 1 3 GRN/YL W 5 PFC GRN LD9 POWER BOARD RT 64 2 1 CN3 RED WHT RS2 RS1 R64A RS3 RS4 F801 CN901 NR64 ELECTRONIC CONTROL P. C.BOARD CB1 CB2 CB3 HC930 IPM NF BLK BLK ...
Page 12 - REFRIGERANT SYSTEM DIAGRAM
12 REFRIGERANT SYSTEM DIAGRAM 7 MUZ-GA50VA MUZ-GA60VA - E1 Unit: mm Outdoor heat exchanger Flared connection DefrostthermistorRT61 Discharge temperature thermistor RT62 Flared connection Stop valve Stop valve(with service port) Capillary tubeØ3.6 x Ø2.4 x 50 Refrigerant flow in cooling Compressor 4-...
Page 14 - MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
14 Refrigerant PipingMax. length A Max. Heightdifference B Indoorunit Outdoor unit MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE Refrigerant piping : m Max. length A Max. Height difference B 15 30 Gas 12.7 15.88 Liquid 6.35 9.52 MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA Model Piping size O.D : mm...
Page 15 - PERFORMANCE CURVES; INDOOR UNIT; Wet and dry bulb
15 PERFORMANCE CURVES 8 The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating condi-tions vary according to the areas where these units are installed, the following information has been provided to clarify the operating characteristic...
Page 16 - frost and defrost operation.
16 MUZ-GA71VA 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 operational frequency of compressor Correction of Heating total input T...
Page 17 - The conversion factor is:; COOL operation; Both indoor and outdoor unit are under the; -4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT
17 NOTE: The unit of pressure has been changed to MPa on the international system of units (SI unit system). The conversion factor is: 1 (MPa [Gauge]) =10.2 (kgf/cm 2 [Gauge]) (MPa [Gauge]) (kgf/cm 2 [Gauge]) 18 32 15 2050 2560 3070 (%) 35(°C) 0.3 0.4 0.5 0.6 0.7 0.8 3 4 5 6 7 8 9 0.9 Ambient temper...
Page 18 - HEAT operation
18 Outdoor unit current (A) Outdoor unit current (A) Ambient temperature(°C) Ambient temperature(°C) Outdoor unit current (A) Ambient temperature(°C) MUZ-GA71VA MUZ-GA50VA MUZ-GA60VA 10.0 9.0 8.0 7.0 6.0 5.0 4.0 2 5 10 15 20 25(°C) 16.0 15.0 14.0 13.0 12.0 11.0 10.0 2 5 10 15 20 25(°C) 12.0 11.0 10....
Page 19 - PERFORMANCE DATA COOL operation
19 MSZ-GA50VA: MUZ-GA50VA INDOOR INDOOR CAPACITY:5.0(kW) INPUT:1460(W) SHF:0.65 21 OUTDOOR DB(°C) 25 27 30 WB(°C) Q SHC SHF Q SHC SHF Q SHC SHF Q SHC SHF INPUT INPUT INPUT INPUT DB(°C) 21 18 5.88 2.76 0.47 1200 5.63 2.64 0.47 1260 5.40 2.54 0.47 1320 21 20 6.13 2.14 0.35 1260 5.88 2.06 0.35 1335 5.7...
Page 25 - PERFORMANCE DATA HEAT operation
25 CAPACITY:5.9(kW) INPUT:1630(W) OUTDOOR WB(°C) 3.72 1099 4.48 1318 5.25 1487 6.02 1606 6.79 1707 7.49 1758 8.26 1791 3.54 1183 4.25 1403 5.02 1555 5.72 1673 6.49 1758 7.20 1808 7.94 1876 3.19 1268 3.95 1487 4.66 1639 5.43 1758 6.20 1842 6.90 1893 7.67 1944 INDOOR -10 -5 0 5 10 15 20 DB(°C) Q INPUT...
Page 26 - ACTUATOR CONTROL; -3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR; NOTE
26 9 ACTUATOR CONTROL MUZ-GA50VAMUZ-GA60VAMUZ-GA71VA Relation between main sensor and actuator. 9-3. RELATION BETWEEN MAIN SENSOR AND ACTUATOR 9-2. R.V. COIL CONTROL Heating . . . . . . . . . . . . . . . . . ON Cooling . . . . . . . . . . . . . . . . . OFF Dry . . . . . . . . . . . . . . . . . . . ....
Page 27 - Troubleshooting procedure; and the components for bursting and discoloration.; Before troubleshooting, check the following; Contents of “SERVICE FUNCTIONS” have been removed.; Lead wiring
27 SERVICE FUNCTIONS 10 TROUBLESHOOTING 11 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 OPERATION INDICATOR lamp is flashing on and off before starting serv-ic...
Page 30 - Outdoor failure mode table
30 3. Outdoor failure mode table OFF None (Normal) 2-time flash 3-time flash 4-time flash 5-time flash 6-time flash 7-time flash 8-time flash Lighting Lighting Lighting Once Lighting OnceLighting TwiceLighting 3 timesLighting 4 times Lighting 9 times Once Goes out Lighting Lighting Lighting Lighting...
Page 35 - Other models
35 Part name Check method and criterion Figure Defrost thermistor (RT61) Ambient temperature thermistor (RT65) Outdoor heat exchanger temperature thermistor (RT68) Measure the resistance with a tester. Refer to 11-7. “Test point diagram and voltage”, 1. “Outdoor electroniccontrol P.C. board”, for th...
Page 36 - Check of power supply; Outdoor unit does not operate.
36 Check of power supply Outdoor unit does not operate. 11-6. TROUBLESHOOTING FLOW Turn ON power supply. No Yes Yes No No Yes No Yes Yes No Replace the power board. Check the connecting of parts of main power supply circuit. Is there voltage of 230 VAC in the power supply terminal block? Is the outp...
Page 39 - Check of LEV; How to check inverter/compressor
39 When OPERATION INDICATOR lamp flashes 5-time.• When heating, room does not get warm.• When cooling, room does not get cool. Check of LEV No Yes No Yes Turn ON power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely. Is "click - click" sound heard?Or, d...
Page 41 - Check of HPS; • When the operation frequency does not go up from lowest frequency.; I Check of bus-bar voltage
41 Check of HPS • When the operation frequency does not go up from lowest frequency. MUZ-GA60VA - E3 MUZ-GA71VA Infinity 0 Ω No Yes 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...
Page 42 - Electromagnetic noise enters into TV sets or radios
42 Electromagnetic noise enters into TV sets or radios J Replace or repair the antenna.Replace or repair the coaxial cable. No No No Yes Yes No No Yes Yes Yes Is the distance between theantennas and the indoorunit within 3m, or is thedistance between theantennas and the outdoorunit within 3m? Is the...
Page 45 - Outdoor power board
45 MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA 3. Outdoor power board 325-370 VDCOutput (Red) (White) Connect to the compressorVoltage among phases: 5 V to 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...
Page 46 - DISASSEMBLY INSTRUCTIONS; OPERATING PROCEDURE; Removing the cabinet
46 12 DISASSEMBLY INSTRUCTIONS MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA NOTE: These photos are MUZ-GA71VA. Other models are almost the same as MUZ-GA71VA.Turn OFF power supply before disassembly. OPERATING PROCEDURE PHOTOS 1. Removing the cabinet (1) Remove the screws of the service panel.(2) Remove the scr...
Page 47 - CN661 (Discharge temperature thermistor, defrost; Photo 4; Screws of the relay panel
47 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, inverter P.C. board and power board (1) Remove the top panel, cabinet and service panel. (Refer to 1.) (2) Remove the back panel.(Refer to 1.)(3) Disconnect the following connectors; <Electronic control P.C. board> CN931 and CN93...
Page 48 - Photo 5
48 5. Removing outdoor fan motor (1) Remove the top panel, cabinet and service panel. (Refer to 1.) (2) Remove the back panel. (Refer to 1.)(3) Disconnect the following connectors; <Electronic control P.C. board> CN931 and CN932 (Fan motor) (4) Remove the propeller.(5) Remove the screws fixing...
Page 49 - Photo 8; Brazed parts of 4-way valve; Removing the compressor and 4-way valve; Recover gas from the pipes until the pressure; Removing the reactor; Screws of the reactor; Photo 9
49 OPERATING PROCEDURE PHOTOS Photo 8 Brazed parts of 4-way valve 6. Removing the compressor and 4-way valve (1) Remove the top panel, cabinet and service panel. (Refer to 1.) (2) Remove the back panel. (Refer to 1.)(3) Remove the inverter assembly. (Refer to 2.)(4) Recover gas from the refrigerant ...
Page 50 - PARTS
50 4 19 9 1 13 10 12 2 5 6 7 8 16 14 20 22 23 24 25 29 30 31 3 13 PARTS LIST (non-RoHS compliant) MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA13-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS 11 15 17 18 21 28 27 26 13-2. ACCESSORY 33 34
Page 51 - Part number that is circled is not shown in the illustration.
51 MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA13-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Symbol in Wiring Diagram Q'ty/unit Remarks Part No. No. Part Name MUZ-GA50 VA - E1 MUZ-GA60 VA - E1 MUZ-GA71 VA - E1 E02 819 297E02 851 630E02 853 630E02 938 301E02 851 501E02 851 290E02 853...
Page 53 - RoHS
53 MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA14-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Symbol in Wiring Diagram Q'ty/unit Remarks Part No. RoHS No. Part Name MUZ-GA50 VA - E1 MUZ-GA60 VA - E1 E2 E1 E2 MUZ-GA71 VA - E12 819 297E12 851 630E12 853 630E12 938 301E12 851 501E12 851...