Page 4 - TECHNICAL CHANGES; INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT; • Compressor has been changed.(KNB073FBVH
4 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 Non Non Previous refrigerant R22 R22 (100%) Single r...
Page 5 - NOTE : The unit of pressure has been changed to MPa on the; Can R22 tools be used?; Tools dedicated for the air conditioner with R410A refrigerant; Compressor
5 -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 co...
Page 7 - PART NAMES AND FUNCTIONS; Air inlet; ACCESSORIES; SPECIFICATION
7 PART NAMES AND FUNCTIONS 2 Air inlet Air outlet Drain outlet Piping Drain hose (back and side) ACCESSORIES 1 Drain socket MUZ-FA25VA MUZ-FA25VAH MUZ-FA35VA MUZ-FA35VAH 1 2 Quick clean kit 1 1 Single phase 230V,50Hz 10 3.5 KNB073FDVH 550 U-V 1.53 U-W 1.53 V-W 1.53 RC0J50-AL WHT-BLK 37.5 BLK-RED 37....
Page 8 - Specifications and rating conditions of main electric parts
8 Model Item Current transformer Current transformer Smoothing capacitor Diode module Fuse Fuse Defrost heater Intelligent power module Expansion valve coil Reactor Current-detecting resistor Current-detecting resistor Current-limiting resistor Terminal block Relay Relay Relay R.V. coil Heater prote...
Page 9 - NOISE CRITERIA CURVES
9 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 OCT A VE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR BAND CENTER FREQUENCIES, Hz APPROXIMATETHRESHOLD OF HEARING FORCONTINUOUSNOISE COOLING FUNCTION SPL(dB(A)) LINE High ...
Page 10 - OUTLINES AND DIMENSIONS; REQUIRED SPACE
10 5 OUTLINES AND DIMENSIONS 10 69 800 302.5 500 Bolt pitch for installation 150 22.3 Handle 550 280 164.5 99.5 170.5 23 Service panel Service port 285 344.5 44 400 Air in Air out Air in 17.5 Bolt pitch f o r installation 304~325 40 Liquid refrigerant pipe jointRefrigerant pipe (flared) [ 6.35 Gas r...
Page 11 - WIRING DIAGRAM; CT
11 WIRING DIAGRAM 6 SYMBOL CT ,CT761,CT781 C63A,C63B,C63C DB61,DB65 DSA61 F61 F71,F801 IC801 IPM LEV SYMBOL L61 L62,L63 MC MF NR63,NR64 R T61 R T62 R T64 R T65 SYMBOL R61,R831 R64A,R64B TB1,TB2 TR821 T801 X63,X64 21S4 NAME CURRENT TRANSFORMER SMOOTHING CAP ACIT OR DIODE MODULE SURGE ABSORBER FUSE (T...
Page 12 - MC
12 SYMBOL CT ,CT761,CT781 C63A,C63B,C63C DB61,DB65 DSA61 F61 F71,F801,F901 IC801 IPM,IC932 LEV SYMBOL L61 L62,L63 MC MF NR63,NR64 R T61 R T62 R T64 R T65 SYMBOL R61,R831 R64A,R64B TB1,TB2 TR821 T801 X63,X64 21S4 NAME CURRENT TRANSFORMER SMOOTHING CAP ACIT OR DIODE MODULE SURGE ABSORBER FUSE (T20AL25...
Page 15 - REFRIGERANT SYSTEM DIAGRAM
15 REFRIGERANT SYSTEM DIAGRAM 7 Unit:mm Outdoor heat exchanger Flared connection Defrost thermistor RT61 DischargetemperaturethermistorRT62 Flared connection Stop valve (with strainer) Stop valve(with service port) Refrigerant flow in cooling Compressor 4-way valve Refrigerant flow in heating Refrig...
Page 16 - MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
16 ADDITIONAL REFRIGERANT CHARGE (R410A:g) Outdoor unit precharged 14m 270 7m 0 6m 0 5m 0 11m 180 Model Refrigerant piping length (one way) Calculation : Xg=30g/m o (Refrigerant piping length(m) - 5) 8m 90 9m 120 10m 150 12m 210 13m 240 15m 300 20m 450 MUZ-FA25VA MUZ-FA25VAH MUZ-FA35VA MUZ-FA35VAH 9...
Page 17 - PERFORMANCE CURVES; (1) GUARANTEED VOLTAGE; INDOOR UNIT
17 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 been pro-vided to clarify the o...
Page 19 - COOL operation; Both indoor and outdoor unit are under the; HEAT operation; -4. Outdoor low pressure and outdoor unit current
19 (kgf/ F [Gauge]) (MPa [Gauge]) 18 32 15 2050 2560 3070 (%) 35(˚C) 0.2 0.4 0.6 0.8 1.0 1.2 57Hz 2 4 6 8 10 12 14 1.4 Ambient temperature(˚C) Ambient humidity(%) Outdoor low pressure MUZ-FA25VAMUZ-FA25VAH 15 2050 2560 3070 (%) 35(˚C) 2 2.5 3 3.5 4 57Hz 32 18 Outdoor unit current(A) Ambient temperat...
Page 20 - PERFORMANCE DATA COOL operation
20 MSZ-FA25VA : MUZ-FA25VA MUZ-FA25VAH 21 18 2.94 1.79 0.61 476 2.81 1.72 0.61 500 2.70 1.65 0.61 524 2.60 1.59 0.61 547 21 20 3.06 1.50 0.49 500 2.94 1.44 0.49 530 2.85 1.40 0.49 541 2.75 1.35 0.49 565 22 18 2.94 1.91 0.65 476 2.81 1.83 0.65 500 2.70 1.76 0.65 524 2.60 1.69 0.65 547 22 20 3.06 1.62...
Page 21 - SHF : Sensible heat factor
21 21 18 2.45 1.49 0.61 583 2.25 1.37 0.61 619 2.08 1.27 0.61 643 21 20 2.58 1.26 0.49 607 2.40 1.18 0.49 637 2.23 1.09 0.49 672 22 18 2.45 1.59 0.65 583 2.25 1.46 0.65 619 2.08 1.35 0.65 643 22 20 2.58 1.36 0.53 607 2.40 1.27 0.53 637 2.23 1.18 0.53 672 22 22 2.73 1.12 0.41 631 2.55 1.05 0.41 666 2...
Page 22 - Rated frequency 70Hz
22 21 18 4.11 2.39 0.58 748 3.94 2.28 0.58 785 3.78 2.19 0.58 823 3.64 2.11 0.58 860 21 20 4.29 1.97 0.46 785 4.11 1.89 0.46 832 3.99 1.84 0.46 851 3.85 1.77 0.46 888 22 18 4.11 2.55 0.62 748 3.94 2.44 0.62 785 3.78 2.34 0.62 823 3.64 2.26 0.62 860 22 20 4.29 2.14 0.50 785 4.11 2.06 0.50 832 3.99 2....
Page 24 - PERFORMANCE DATA HEAT operation
24 PERFORMANCE DATA HEAT operation CAPACITY:3.2(kW) INPUT:735(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 15 2.02 478 2.43 573 2.85 647 3.26 698 3.68 742 4.06 764 4.48 779 21 1.92 515 2.30 610 2.72 676 3.10 728 3.52 764 3.90 786 4.30 ...
Page 25 - ACTUATOR CONTROL; -3. Relation between main sensor and actuator
25 ACTUATOR CONTROL 9 MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH Discharge temperature thermistor Indoor coil temperature thermistor Defrost thermistor Fin temperature thermistor Ambient temperature thermistor Purpose Protection Cooling : Coil frost prevention Heating : High pressure protection C...
Page 26 - SERVICE FUNCTIONS; CHANGE IN DEFROST SETTING; Jumper wire; JS; TROUBLESHOOTING; Troubleshooting procedure; the components for bursting and discoloration.; Before troubleshooting, check the following; Housing point
26 10 SERVICE FUNCTIONS CHANGE IN DEFROST SETTING Changing defrost finish temperature<JS> When the JS wire of the outdoor Inverter P.C. board is cut/ soldered, the defrost finish temperature is changed. (Refer to 11-7.1.) Jumper wire Defrost finish temperature JS none (cut) soldered (Initial s...
Page 29 - Outdoor unit failure mode table
29 3. Outdoor unit failure mode table OFF 2-time flash 2.5 seconds OFF 3-time flash 2.5 seconds OFF 4-time flash 2.5 seconds OFF 5-time flash 2.5 seconds OFF 6-time flash 2.5 seconds OFF 7-time flash 2.5 seconds OFF 8-time flash 2.5 seconds OFF 9-time flash 2.5 seconds OFF 10-time flash 2.5 seconds ...
Page 30 - Start
30 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.) Outdoor unit doesn't operate even in Test Run ...
Page 33 - Check of open phase
33 ● With the connector between the compressor and the intelligent power module disconnected, activate the inverter and check if the inverter is normal by measuring the balance of voltage between the terminals. << Operation method>> Start cooling or heating operation by pressing EMERGENC...
Page 35 - Check of outdoor thermistors; Unit operates COOL mode even if it is set to HEAT mode.
35 Check of outdoor thermistors G When POWER lamp flashes 6-time.The thermistors in the outdoor unit are abnormal. Check of R.V. coil H Unit operates COOL mode even if it is set to HEAT mode. Unit operates HEAT mode even if it is set to COOL mode. Measure the resistance between CN641 1 and 2 . Measu...
Page 36 - Check of power supply; Inverter does not operate.; Check of outdoor fan motor; Outdoor fan motor does not operate.
36 Check of power supply J Inverter does not operate. Check of outdoor fan motor I Outdoor fan motor does not operate. Does the voltage betweeneach terminal repeat 5Vand 0V DC by turns? Does the outdoor fanrotate smoothly? Check the inverter P.C. board.(Refer to 11-6. M ) No Yes Yes ( Fixed to eithe...
Page 37 - Check of current-limiting resistor; Heating/Cooling does not work sufficiently.
37 Outdoor unit does not operate at all, or stops immediately due to overcurrent. Check of LEV (Expansion valve) Check of current-limiting resistor K L Heating/Cooling does not work sufficiently. When the current-limiting resistor is open, the rush current limiting relay (X64) may not work properly....
Page 38 - Check of defrost heater; Outdoor base gets frozen.
38 Check of defrost heater M Replace the inverter P.C. board. Is there 230V AC between CN722 1 and 3 on the power P.C. board? Refer to 11-7.2. Yes No No problem of the power P.C. board. Is the voltage between CN726 2 (+)- 3 (-) on the power P.C. board 0V DC? Refer to 11-7.2. Yes No Replace the power...
Page 41 - Electromagnetic noise enters into TV sets or radios
41 Electromagnetic noise enters into TV sets or radios P 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 42 - GND
42 1. Inverter P.C. board MUZ-FA25VA (Serial No : ~5002650T) MUZ-FA35VA (Serial No : ~5003000T) MUZ-FA25VAH (Serial No : ~5000400T) MUZ-FA35VAH (Serial No : ~5000400T) Back side of unit -20 -10 0 10 20 30 40 0 10 20 30 40 50 60 70 80 90 100 Temperature( : ) Ambient temperature thermistor(RT65) Defro...
Page 43 - Back side of unit; Fin temperature; Front side of unit; Rotational frequency
43 MUZ-FA25VA (Serial No : 5002651T~) MUZ-FA35VA (Serial No : 5003001T~) MUZ-FA25VAH (Serial No : 5000401T~) MUZ-FA35VAH (Serial No : 5000401T~) Back side of unit -20 -10 0 10 20 30 40 0 10 20 30 40 50 60 70 80 90 100 Temperature( : ) Ambient temperature thermistor(RT65) Defrost thermistor(RT61) Tem...
Page 45 - DISASSEMBLY INSTRUCTIONS; OPERATING PROCEDURE; Photo 1; Photo 2
45 12 DISASSEMBLY INSTRUCTIONS OPERATING PROCEDURE PHOTOS Photo 1 1. Removing the cabinet (1) Remove the screw fixing the service panel. (See Photo 2.)(2) Pull down the service panel and remove it. (See Photo 2.)(3) Disconnect the power supply and indoor/outdoor connecting wire.(4) Remove the screws...
Page 46 - (2) Disconnect the power supply and indoor/outdoor connecting; Photo 5; Discharge temperature thermistor; Photo 3; Heat sink
46 4. Removing the discharge temperature thermistor and defrost thermistor (1) Remove the top panel, cabinet and service panel. (Refer to 1.) (2) Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to 1.) (3) Remove the inverter assembly. (Refer to 2.)(4)...
Page 47 - Photo 6
47 OPERATING PROCEDURE PHOTOS Photo 6 Defrostthermistor 5. Removing outdoor fan motor (1) Remove the top panel, cabinet and service panel. (Refer to 1.) (2) Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel. (Refer to 1.) (3) Disconnect the connectors for outdo...
Page 48 - 3-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS
48 13 PARTS LIST (non-RoHS compliant) 13-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 1 11 12 2 18 20 13 10 9 MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH 3 4 5 6 7 8 19 17 23 21 22 24 16 15 14 OB372D --2qxp 07.5.7 4:50 PM Page 48
Page 49 - Part number that is circled is not shown in the illustration.
49 E02 927 232E02 927 521E02 927 501E02 927 290E02 928 290E02 927 900E02 929 900E02 065 506E02 927 661E02 927 662E02 927 245E02 927 233E02 927 640E02 838 640E02 927 493E02 927 961E02 928 079E02 930 079E02 928 525 E02 930 525E02 928 523E02 930 523E02 838 523E02 929 523 E02 927 293E02 928 293E02 929 2...
Page 50 - Part numbers that are circled are not shown in the illustration.
50 13-2. OUTDOOR UNIT ELECTRICAL PARTS 10 6 1 4 REACTORPOWER P.C. BOARDPOWER P.C. BOARDR.V. COILTHERMISTOR SETAMBIENT TEMPERATURE THERMISTORFUSE HOLDERFUSETERMINAL BLOCKTERMINAL BLOCKINVERTER P.C. BOARDINVERTER P.C. BOARDINVERTER P.C. BOARDINVERTER P.C. BOARDFUSEVARISTORVARISTOR E02 838 337E02 927 4...
Page 52 - 4-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS
52 14 RoHS PARTS LIST (RoHS compliant) 14-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 1 11 12 2 18 20 13 10 9 MUZ-FA25VA MUZ-FA35VA MUZ-FA25VAH MUZ-FA35VAH 3 4 5 6 7 8 19 17 23 21 22 24 16 15 14 OB372D --2qxp 07.5.7 4:50 PM Page 52
Page 53 - RoHS
53 E12 927 232E12 927 521E12 927 501E12 927 290E12 928 290E12 927 900E12 929 900E12 065 506E12 927 661E12 927 662E12 927 245E12 927 233E12 927 640E12 838 640E12 927 493E12 927 961E12 928 079E12 930 079E12 928 525 E12 930 525E12 928 523E12 930 523E12 838 523E12 929 523 E12 927 293E12 928 293E12 929 2...
Page 56 - Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN C C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in May 2007. No. OB372 REVISED EDITION-D 6Distributed in Feb. 2007. No. OB372 REVISED EDITION-C 6Distributed in May 2006. No. OB372 REVISED EDITION-B ...
