Benutzeranleitung / Produktwartung MXZ-3B24NA des Produzenten Mitsubishi Electronics
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Models SER VICE MANUAL CONTENTS 1. TECHNICAL CHANGES ··································· 2 2. P ART NAMES AND FUNCTIONS ····················· 2 3. SPECIFICA TION ················································ 3 4.
TECHNICAL CHANGES 2 1 P ART NAMES AND FUNCTIONS 2 MXZ-2B20NA Air outlet Drain outlet Air inlet (Back and side) Revision B: • MXZ-3B24NA and MXZ-4B36NA have been added. MXZ-2B20NA New model MXZ-2B20NA MXZ-2B20NA - 1 1. Outdoor fan motor has been changed.
3 SPECIFICA TION 3 Item Outdoor model Indoor type Non-Duct (09+09) Duct (09+12) Capacity Power consumption EER SEER HSPF IV (V) COP External finish Power supply Max.
4 Item Outdoor model Indoor type Non-Duct (06+06+09) Duct (09+09+09) Capacity Power consumption EER SEER HSPF IV (V) COP External finish Power supply Max.
5 Item Outdoor model Indoor type Non-Duct (06+06+09) Duct (09+09+09) Capacity Power consumption EER SEER HSPF IV (V) COP External finish Power supply Max.
6 Item Outdoor model Indoor type Non-Duct (09+09+09+09) Duct (09+09+09+09) Capacity Power consumption EER SEER HSPF IV (V) COP External finish Power supply Max.
7 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMA TE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC-60 NC-50 NC-40 NC-30 NC-20 NC-70 OCT AVE BAND SOUND PRESSURE LEVEL, 0dB = 0.
8 OUTLINES AND DIMENSIONS 5 MXZ-2B20NA Unit: inch LIQ 1/4"FLARE GAS 3/8"FLARE Unit B Unit A LIQ GAS GAS LIQ 1-3/16" 1/2" 13" 2-5/8" 7-7/8" 9-7/16" 14-3/16".
9 MXZ-3B24NA MXZ-3B30NA Unit: inch A B C 15/16" 7/16" 5/8" 5/8" 1-1/16" 1-9/16" 14" 15-1/4" 10-5/8" 9-27/32" 1-3/8" 19-1 1/16" 7-7/8" 7.
10 MXZ-4B36NA A B C D 15/16" 7/16" 5/8" 5/8" 1-1/16" 1-9/16" 14" 15-1/4" 10-5/8" 9-27/32" 1-3/8" 19-1 1/16" 7-7/8" 7-7/8" 2-29/32&.
11 WIRING DIAGRAM 6 MXZ-2B20NA MXZ-2B20NA - 1.
12 MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA.
13 Stop valve with service port Stop valve Strainer #100 Power receiver LEV A LEV B Oil separator Compressor Defrost thermistor RT61 Distributor Muffler 4-way valve LEV E Indoor unit B Indoor unit A Indoor unit A Indoor unit B Capillary tube O.D.0.14 x I.
14 Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes, refer to the tables below . When the diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe.
15 Stop valve (with service port) Stop valve Power receiver LEV A LEV B LEV C Oil separator Compressor Muffler 4-way valve LEV F Indoor unit C Indoor unit B Indoor unit A Indoor unit A Indoor unit B Indoor unit C Capillary tube O.D.0.10 x I.D.0.02 x 39.
16 Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes, refer to the tables below . When the diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe.
17 Stop valve (with service port) Stop valve Power receiver LEV A LEV B LEV C Oil separator Compressor Muffler 4-way valve LEV F Indoor unit C Indoor unit B Indoor unit A Indoor unit A Indoor unit B Indoor unit C Capillary tube O.D.0.10 x I.D.0.02 x 39.
18 Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes, refer to the tables below . When the diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe.
19 D ATA 8 Model MXZ-2B20NA Indoor type Non-Duct (09+09) Duct (09+12) Item Unit Cooling Heating Cooling Heating T otal Capacity But/h 18,000 22,000 20,000 22,000 SHF – – – – – Input kW 1.44 1.65 2.19 1.78 Electrical circuit Power supply (V ,phase,Hz) 208/230, 1, 60 Input kW 1.
20 Model MXZ-4B36NA Indoor type Non-Duct (09+09+09+09) Duct (09+09+09+09) Item Unit Cooling Heating Cooling Heating T otal Capacity But/h 35,400 36,000 34,400 34,400 SHF – – – – – Input kW 3.76 3.02 3.94 3.1 Electrical circuit Outdoor unit MXZ-4B36NA Power supply (V ,phase,Hz) 208/230,1,60 Input kW 3.
21 (2) OPERA TION Function Cooling Heating "A" Cooling steady state at rated compressor speed "B-2" Cooling steady state at rated compressor speed "B-1" Cooling steady st.
22 MXZ-2B20NA MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating conditions vary according to the .
23 09 class (47Hz) 12 class (59Hz) 15 class (78Hz) Indoor unit class (Inverter output frequency) Indoor air DB temperature difference (degree) 22.1 20.5 18.7 17.1 15.3 13.7 11 . 9 10.3 8.5 6.8 32.8 30.2 27.7 25.2 22.7 20.2 17.6 15.1 12.6 10.1 40.9 37.
24 06 class (15Hz) *24 class (56Hz) 18 class (49Hz) 15 class (33Hz) 12 class (29Hz) Indoor unit class (Inverter output frequency) Indoor air WB temperature difference (degree) 09 class (20Hz) 11 . 2 10.3 9.5 8.6 7.9 7.0 6.3 7.7 7.2 6.7 6.1 5.6 5.0 4.5 13.
25 0 50 100 0.5 1.0 1.5 2.0 0 50 100 0.5 1.0 1.5 2.0 05 0 1 0 0 0.5 1.0 1.5 2.0 05 0 1 0 0 0.5 1.0 1.5 2.0 05 0 1 0 0 0.5 1.0 1.5 2.0 05 0 1 0 0 0.5 1.0 1.5 2.0 05 0 1 0 0 0.5 1.0 1.5 2.0 0 50 100 0.5 1.0 1.5 2.0 05 0 1 0 0 0.5 1.0 1.5 2.0 0 50 100 0.
26 (OUTDOOR UNIT : MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA) 0 50 100 0.5 1.0 1.5 2.0 05 0 1 0 0 0.5 1.0 1.5 2.0 0 50 100 0.5 1.0 1.5 2.0 0 50 100 0.5 1.0 1.5 2.0 0 50 100 0.5 1.0 1.5 2.0 05 0 1 0 0 0.5 1.0 1.5 2.0 0 50 100 0.5 1.0 1.5 2.0 05 0 1 0 0 0.5 1.0 1.
27 8-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT 1. 06-class unit in single operation (OUTDOOR UNIT : MXZ-2B20NA) (1) COOL operation Data is based on the condition of indoor humidity 50% Air flow.
28 2. 09-class unit in single operation (OUTDOOR UNIT : MXZ-2B20NA) (1) COOL operation Data is based on the condition of indoor humidity 50% Air flow speed: High Inverter output frequency: 40 Hz (2) H.
29 3. 12-class unit in single operation (OUTDOOR UNIT : MXZ-2B20NA) (1) COOL operation 65 70 75 80 85 90 95 100 105 1 10 1 15 120 140 150 160 170 130 Ambient temperature ( ˚ F) ( ˚ F) 86 80 75 70 86 80 75 70 15 20 25 30 35 40 45 50 55 60 65 70 75 2.
30 4. 15-class unit in single operation (OUTDOOR UNIT : MXZ-2B20NA) (1) COOL operation 65 70 75 80 85 90 95 100 105 1 10 1 15 120 130 140 150 160 170 Ambient temperature ( ˚ F) ( ˚ F) 86 80 75 70 86 80 75 70 15 20 25 30 35 40 45 50 55 60 65 70 75 2.
31 5. 06-class unit in single operation (OUTDOOR UNIT : MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA) (1) COOL operation Data is based on the condition of indoor humidity 50% Air flow speed : High Inverter output frequency : 24 Hz (2) HEA T operation <How to work fixed-frequency operation> 1.
32 6. 09-class unit in single operation (OUTDOOR UNIT : MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA) (1) COOL operation Data is based on the condition of indoor humidity 50% Air flow speed : High Inverter output.
33 7. 12-class unit in single operation (OUTDOOR UNIT : MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA) (1) COOL operation 65 70 75 80 85 90 95 100 105 1 10 1 15 11 0 120 130 140 150 160 Ambient temperature ( ˚ F) ( ˚ F) 86 80 75 70 86 80 75 70 15 20 25 30 35 40 45 50 55 60 65 70 75 2.
34 8. 15-class unit in single operation (OUTDOOR UNIT : MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA) (1) COOL operation 65 70 75 80 85 90 95 100 105 1 10 1 15 120 130 140 150 160 170 Ambient temperature ( ˚ F) ( ˚ F) 86 80 75 70 86 80 75 70 15 20 25 30 35 40 45 50 55 60 65 70 75 2.
35 9. 18-class unit in single operation (OUTDOOR UNIT : MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA) (1) COOL operation (2) HEA T operation 65 70 75 80 85 90 95 100 105 1 10 1 15 120 130 140 150 160 170 Ambient temperature ( ˚ F) ( ˚ F) 86 80 75 70 86 80 75 70 15 20 25 30 35 40 45 50 55 60 65 70 75 2.
36 10. 24-class unit in single operation (OUTDOOR UNIT : MXZ-4B36NA) (1) COOL operation 65 70 75 80 85 90 95 100 105 1 10 1 15 130 140 150 160 170 180 Ambient temperature ( ˚ F) ( ˚ F) 15 20 25 30 35 40 45 50 55 60 65 70 75 2.0 3.0 4.0 5.0 6.0 7.0 Ambient temperature ( ˚ F) 65 70 75 80 85 90 95 100 105 1 10 1 15 1.
37 SER VICE FUNCTIONS 10 ACTUA T OR CONTROL 9 Relation between main sensor and actuator MXZ-2B20NA MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA Discharge temperature thermistor Indoor coil thermistor Defrost ther.
38 10-2. AUTO LINE CORRECTING <MXZ-3B24NA, MXZ-3B30NA, MXZ-4B36NA> Outdoor unit has an auto line correcting function which automatically detects and corrects improper wiring or piping. Improper wiring or piping can be automatically detected by pressing the piping/wiring correction switch (SW871).
39 11 3. T roubleshooting procedure 1) First, check if the OPERA TION INDICA TOR lamp on the indoor unit is flashing on and off to indicate an abnormality . T o make sure, check how many times the abnormality indication is flashing on and off before starting service work.
40 The left lamp of OPERA TION INDICA TOR lamp (Indoor unit) OFF 2-time flash 3-time flash 4-time flash 5-time flash 6-time flash 7-time flash 8-time flash Lighting Lighting Lighting Lighting Lighting.
41 Operation start Check the outdoor unit LED indicator . Refer to 1 1-6. "Check of power supply". • Indoor unit serial signal error Refer to 1 1-6. "How to check mis-wiring and serial signal error". • COOL or HEA T operation only Refer to 1 1-6.
42 1 1-4. TROUBLESHOOTING CHECK T ABLE LED2 LED1 Outdoor electronic control P .C. board (Parts side) Lighting LED1 LED2 Lighting LED1(Red) LED2(Y ellow) Lighting T wice Outdoor power system • Check the connection of the compressor connecting wire. • Refer to 1 1-6.
43 Primary current protection Secondary current protection High-pressure protection Defrosting in cooling 3 times Lighting Discharge temperature protection • Check refrigerant circuit and refrigerant amount. • Refer t1 1 1-6. "Check of LEV".
44 1 1-5. TROUBLE CRITERION OF MAIN P ARTS MXZ-2B20NA MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA Normal Discharge temperature thermistor (RT62) Fin temperature thermistor (RT64) Measure the resistance using a tester . (Part temperature: 14°F ~ 104°F) Part name Check method and criterion 1.
45 Check of power supply Outdoor unit does not operate. T urn ON the power supply . No Ye s Ye s No Ye s No Ye s No Replace the power board. Check the connecting of parts of main power supply circuit. Is there voltage of 208/230 V AC in the power supply terminal block? Is the output voltage from the noise filter P .
46 Is there rated voltage in the power supply ? Is there any mis-wiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire ? 1 Mis-wiring may damage indoor electronic control P .C. board during the operation. Be sure to confirm the wiring is correct before the operation starts.
47 Check of R.V . coil No Ye s No Ye s No Ye s No Ye s No Ye s 1. Disconnect the lead wire leading to the compressor . 2. 3 minutes after turning ON the power supply , start EMERGENCY OPERA TION in HEA T mode. Is there voltage of 208/230 V AC between pin1 and pin 2 at connector CN912 ? T urn OFF the power supply of indoor and outdoor unit.
48 Check of LEV No Ye s No Ye s T urn ON the power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely . Is "click - click" sound heard ? Or , do you feel vibration of LEV coil with your hand ? Disconnect the connectors.
49 How to check inverter/compressor • When heating, room does not get warm. • When cooling, room does not get cool. No No Ye s Ye s Ye s No Ye s No Disconnect the terminal of the compressor . 3 minutes after turning ON the power supply , start EMERGENCY OPERA TION.
50 Check of outdoor thermistors • When thermistor is abnormal. Thermistor Defrost Discharge temperature Outdoor heat exchanger temperature Ambient temperature Fin temperature Symbol RT6 1 RT6 2 RT6 8 RT6 5 RT6 4 Connector , Pin No.
51 The other cases Indoor unit does not operate. (different operating models in multi system) • When you try to run two indoor units simultaneously , one for cooling and the other for heating, the unit which transmits signal to the outdoor units first decides the operation mode.
52 700 600 500 400 300 200 100 0 Resistance (k Ω ) T emperature (°F) Discharge temperature thermistor (RT62) 32 50 68 86 104 122 140 158 176 194 212 230 248 -4 14 32 50 68 86 104 100 90 80 70 60 50 .
53 MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA LED 1 LED 2 F931 FUSE T3.15AL250V ( CN932 20-90 V AC GND 5 V DC 5 V DC pulse wave ( T o fan motor (+) (–) Rush current relay (–)R.
54 2. Noise filter P .C. board 208/230 V AC Output F64 FUSE T2AL250V { { CN901 T o electronic control P .C. board CN912 R.V . coil 208/230 V AC { CN902 T o power board CN903 T o power board F65 FUSE T6.
55 MXZ-2B20NA 3. Outdoor Power board (Red) (White) Connect to the compressor V oltage among phases: 5 V to 180 V Connect to the earth CN5 Primary current detection (Connect to the noise filter) CN2 Connect to the controller board (+)1-5(–): Signal transmission (T o electronic control P .
56 MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA (Red) (White) Connect to the compressor V oltage among phases: 5 V to 180 V Connect to the earth CN5 Primary current detection (Connect to the noise filter) CN2 Connect to the controller board (+)1-5(–): Signal transmission (T o electronic control P .
57 DISASSEMBL Y INSTRUCTIONS 12 (1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the locking mechanism. Slide the sleeve. Pull the terminal while pushing the locking lever . Hold the sleeve, and pull out the terminal slowly .
58 OPERA TING PROCEDURE PHOTOS 3 . Removing the fan motor (1) Remove the top panel, the service panel, and the cabinet (Photo 1, 2). (2) Disconnect the connector CN931 and CN932 on the outdoor electronic control P .C. board. (3) Remove the propeller .
59 OPERA TING PROCEDURE PHOTOS 6. Removing the reactor (1) Remove the top panel (Photo 1). (2) Remove the service panel, cabinet, back panel, and the electrical parts (Photo 1, 2, 3, 4). (3) Disconnect the reactor lead wire from the terminal of the reactor .
60 1. Removing the compressor (1) Remove the screws of the top panel, and remove the top panel. (2) Remove the screws of the service panel, and remove the service panel. (3) Recover gas from the refrigerant circuit. NOTE : Recover gas from the pipes until the pressure gauge shows 0 PSIG.
61 OPERA TING PROCEDURE PHOTOS 3. Removing the 4-way valve (1) Remove the top panel (Photo 1, 2). (2) Remove the service panel, rear panel, and pipe cover (Photo 1,2). (3) Recover gas from the refrigerant circuit. NOTE : Recover gas from the pipes until the pressure gauge shows 0 PSIG.
62 OPERA TING PROCEDURE PHOTOS 5. Removing the reactor (1) Remove the top panel (Photo 1, 2). (2) Disconnect the reactor lead wire. (3) Remove the screws of the reactor , and remove the reactor .
63.
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAP AN © Copyright 2009 MITSUBISHI ELECTRIC CO., L TD Distributed in Mar . 2010. No. OBH560 REVISED EDITION-C 6 Distributed in Feb. 2010. No. OBH560 REVISED EDITION-B 6 Distributed in Dec.
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