Mitsubishi Electric MUZ-GB50VA - Manual

Page 2 - TECHNICAL CHANGES; Refrigerant filling capacity has been changed.

2 1 TECHNICAL CHANGES MUZ-GA50VA - ➔ MUZ- GB50VA - E1 E1 1. Refrigerant filling capacity has been changed. 2. Outdoor electronic control P.C. board has been changed. Revision A: • Compressor has been changed. PreviousNew ModelSNB130FLDHSNB130FLDH1 RoHS PARTS LIST numberE12 851 900E12 939 900 OB455A-...

Page 3 - ACCESSORIES

3 PART NAMES AND FUNCTIONS 2 3 SPECIFICATION Air inlet Piping Air outlet (back and side) Drain hose Drain outlet MUZ-GB50VA Outdoor model Function Power supply Capacity Rated frequency(Min.-Max.) Dehumidification Air flow ✽ 1(High/Low) Power outlet Running current ✽ 1 Power input ✽ 1 Power factor ✽ ...

Page 4 - Specifications and rating conditions of main electric parts

4 Specifications and rating conditions of main electric parts Model Item Current transformer Current transformer Smoothing capacitor Fuse Fuse Fuse Expansion valve coil Intelligent power module Intelligent power module Reactor Power factor controller Resistor Resistor Resistor Solenoid coil relay Te...

Page 5 - NOISE CRITERIA CURVES

5 4 NOISE CRITERIA CURVES OUTDOOR UNIT MICROPHONE 1m COOLING FUNCTION SPL(dB(A)) LINE High FAN SPEED HEATING 52 55 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 Test conditions, Cooling : Dry-bulb temperature 35 : Wet-bu...

Page 6 - OUTLINES AND DIMENSIONS; REQUIRED SPACE

6 OUTLINES AND DIMENSIONS 5 Unit: mm OUTDOOR UNIT MUZ-GB50VA 30 - 35 - 155 90 198 40 515 299 66 34 51 330 360 850 430 500 80 121 840 Open as a rule500mm or more ifthe front and bothsides are open 100mm or more 200mm or more if there are obstaclesto both sides Open as a rule500mm or more if the back,...

Page 7 - WIRING DIAGRAM; MF; MC

7 WIRING DIAGRAM 6 MUZ-GB50VA R64B YLW 230V~ 12-24V CN912 CN663 WHT BLU NOISE FILTER P.C.BOARD BRN TO INDOOR UNIT CONNECTING RED S3 RT65 21 CN61 1 3 GRN/YLW 5 PFC GRN LD9 POWER BOARD RT64 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 B...

Page 8 - REFRIGERANT SYSTEM DIAGRAM; MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

8 7 REFRIGERANT SYSTEM DIAGRAM MUZ-GB50VA OUTDOOR UNIT Unit:mm Outdoor heat exchanger Flared connection Defrost thermistor RT61 Discharge temperature thermistor RT62 Flared connection Stop valve Stop valve(with service port) Capillary tube [ 3.6 ✕ [ 2.4 ✕ 50 Refrigerant flow in cooling Compressor 4-...

Page 9 - PERFORMANCE CURVES; (1) GUARANTEED VOLTAGE; Air flow should be set at MAX.; INDOOR UNIT

9 PERFORMANCE CURVES 8 The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions.Since operating conditions vary according to the areas where these units are installed. The following information has beenprovided to clarify the oper...

Page 10 - frost and defrost operation.

10 Indoor air Dry-bulb temperature difference ( : ) Ind oo r in tak e a ir D ry-b ulb te mp era tur e ( : ) Outdoor intake air Wet-bulb temperature ( : ) Outdoor intake air Wet-bulb temperature ( : ) Indo or in take air D ry-b ulb te mpe ratu re ( : ) 24.1 22.3 20.4 18.5 16.7 14.8 13.0 11.1 Rated fr...

Page 11 - COOL operation; Both indoor and outdoor unit are under the; -4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT; HEAT operation

11 COOL operation 1 Both indoor and outdoor unit are under the same temperature/humidity condition. 2 Operation : TEST RUN OPERATION (refer to 8-3.) Dry-bulb temperature( : ) Relative humidity(%) 20 50 25 60 30 70 8-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT Ambient temperature(˚C) Ambient hum...

Page 12 - PERFORMANCE DATA COOL operation

12 MSZ-GB50VA : MUZ-GB50VA 21 18 5.88 3.00 0.51 1320 5.63 2.87 0.51 1386 5.40 2.75 0.51 1452 5.20 2.65 0.51 1518 21 20 6.13 2.39 0.39 1386 5.88 2.29 0.39 1469 5.70 2.22 0.39 1502 5.50 2.15 0.39 1568 22 18 5.88 3.23 0.55 1320 5.63 3.09 0.55 1386 5.40 2.97 0.55 1452 5.20 2.86 0.55 1518 22 20 6.13 2.63...

Page 14 - PERFORMANCE DATA HEAT operation; Rated frequency 75Hz; ACTUATOR CONTROL

14 PERFORMANCE DATA HEAT operation CAPACITY:5.8(kW) INPUT:1700(W) OUTDOOR WB( : ) INDOOR -10 -5 0 5 10 15 20 DB( : ) Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 152126 3.65 1105 4.41 1326 5.16 1496 5.92 1615 6.67 1717 7.37 1768 8.12 1802 3.48 1190 4.18 1411 4.93 1564 5.63 1683 6.38 1768 ...

Page 15 - TROUBLESHOOTING; Troubleshooting procedure; Housing point; -3. Relation between main sensor and actuator

15 10 TROUBLESHOOTING 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 18 - Outdoor unit failure mode table

18 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 Once Lighting Twice Lighting 3 times Lighting 4 times Lighting 9 times Once Goes out Lighting Lighting Lighting Lighting 3 times Goes out 4 times G...

Page 20 - Start

20 Start Indoor unit operates.Outdoor unit doesn't operate. Indoor unit doesn't receive the signal from remote controller. OPERATION INDICATORlamp on the indoorunit is flashing on and off. Outdoor unit operates onlyin Test Run operation. (Refer to 8-3.) w Outdoor unit doesn't operate even in Test Ru...

Page 24 - How to check inverter/ compressor

24 10-6. Troubleshooting flow MUZ-GB50VA A A How to check inverter/ compressor No No Yes Yes Yes No Yes No Disconnect the terminal of the compressor. 3 minutes after turning on the power supply, start EMERGENCY OPERATION. Is output balanced? Clarify the causes by counting time until the inverter sto...

Page 25 - Check of outdoor thermistors

25 B B Check of outdoor thermistors • When OPERATION INDICATOR lamp flashes 6-time.• When thermistor is abnormal. Yes Yes No No Reconnect the connector CN661, CN663 and CN3. 3 minutes after turning on the power supply, start EMERGENCY OPERATION. Defrost Discharge temperature Outdoor heat exchanger t...

Page 28 - Check of current-limiting resistor; Check of LEV

28 Outdoor unit does not operate at all, or stops immediately due to overcurrent. F F Check of current-limiting resistor ● Check other electric parts in the main circuit together in the case that the current-limiting resistor is defective. Turn ON the powersupply and pressEMERGENCYOPERATION switch. ...

Page 30 - Electromagnetic noise enters into TV sets or radios

30 I I Electromagnetic noise enters into TV sets or radios 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 t...

Page 33 - Outdoor power board; Connect to the earth

33 MUZ-GB50VA 3. Outdoor power board 325-370V DCOutput (Red) (White) Connect to the compressorVoltage among phases: 5V to180V Connect to the earth CN5Primary current detection(Connect to the noise filter) CN2Connect to the controller board(+)1-5(–): Signal transmission (To electronic control P.C. bo...

Page 34 - DISASSEMBLY INSTRUCTIONS; Removing the cabinet; Screw of the top panel

34 DISASSEMBLY INSTRUCTIONS 11 (1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the locking mechanism. 1 Slide the sleeve. 2 Pull the terminal while pushing the locking lever. 1 Hold the sleeve, and pull out the terminal slowly. The terminal...

Page 35 - and power board; thermistor and outdoor heat exchanger; Photo 4; Screws of the relay panel

35 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 CN932...

Page 36 - OPERATING PROCEDURE; (6) Pull out the outdoor heat exchanger temperature thermistor; Photo 5; Propeller

36 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) Remove the inverter assembly. (Refer to 2.)(4) Remove the propeller.(5) Remove the screws fixing the fan motor.(6) Remove the fan motor. Photo 7 OPERATING P...

Page 37 - Photo 8; Recover gas from the pipes until the pressure; Removing the reactor; Screws of the reactor; Photo 9; Welded parts of 4-way valve

37 OPERATING PROCEDURE PHOTOS Photo 8 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 circuit. NOTE: Recover gas f...

Page 38 - FUNCTIONAL PARTS

38 12 RoHS PARTS LIST (RoHS compliant) 4 17 1 12 9 11 2 5 6 7 8 15 13 18 20 21 22 23 27 28 29 3 10 14 16 19 26 25 24 MUZ-GB50VA12-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS OB455 A--2qxp 06.7.31 2:50 PM Page 38

Page 39 - RoHS; Part numbers that are circled are not shown in the illustration.

39 RoHS Symbol in Wiring Diagram Q'ty/unit Remarks Part No. No. Part Name MUZ-GB 50VA - E1 E12 819 297E12 851 630E12 938 301E12 851 501E12 851 290E12 819 232E12 819 009E12 819 521E12 065 506E12 939 900E12 851 661E12 821 662E12 851 640E12 851 493E12 935 490E12 891 961E12 819 650E12 819 245E12 A88 450...

Mitsubishi Electric MUZ-GB50VA - Manual

Table of Contents:

Summary

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