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SERVICE MANUAL

SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS

CONTENTS

1. TECHNICAL CHANGES ····································2

2. PART NAMES AND FUNCTIONS······················2

3. INDOOR /OUTDOOR

CORRESPONDENCE TABLE··········3

4. INDOOR UNITS COMBINATION ·······················4

5. SPECIFICATION·················································9

6. OUTLINES AND DIMENSIONS························11

7. WIRING DIAGRAM ··········································13

8. REFRIGERANT SYSTEM DIAGRAM ··············15

9. PERFORMANCE CURVES ······························20

10. MICROPROCESSOR CONTROL ····················30

11. TROUBLESHOOTING ······································39

12. DISASSEMBLY INSTRUCTIONS·····················53

13. PARTS LIST······················································57

14. OPTIONAL PARTS ····································BACK

Inverter-controlled multi system
Models

MXZ-18NV -
MXZ-32NV -
MXZ-18NV -
MXZ-32NV -

No. OB185

REVISED EDITION C

This manual describes technical data of outdoor unit.
For indoor unit refer to the service manuals No.OB207 and OB196 REVISED EDITION A of corresponding
models.

Model indication

Revision:

●

MXZ-18NV-

and MXZ-18NV-

have been added.

●

Page layout has been changed.

●

Performance curves has been modified.

●

The graph of the outdoor low pressure in the HEAT

operation of the PERFORMANCE CURVE of MXZ-
32NV was deleted.

●

Please void OB185 REVISED EDITION A and B.

MXZ-32NV

Содержание MXZ-18NV

Страница 1: ...IST 57 14 OPTIONAL PARTS BACK Inverter controlled multi system Models MXZ 18NV MXZ 32NV MXZ 18NV MXZ 32NV E2 E2 E1 E1 No OB185 REVISED EDITION C This manual describes technical data of outdoor unit For indoor unit refer to the service manuals No OB207 and OB196 REVISED EDITION A of corresponding models Model indication Revision MXZ 18NV and MXZ 18NV have been added Page layout has been changed Per...

Страница 2: ...1 The desital display self diagnosis function has adopted 2 The desorption method of LEV has changed the screw method to the one touch method 3 The position of the electronical parts has changed 4 The chargeless system has adopted 5 The scroll compressor has adopted 6 The micro control P C board has simplifed 7 The fan speed level has becomed 3 levels Hi Me Lo 8 The low pressure switch has adopted...

Страница 3: ... 07 09 09 18 07 09 12 12 09 09 09 09 09 09 09 12 09 09 09 18 09 09 12 12 MXZ 32NV E1 07 07 07 07 07 09 07 07 12 or 13 07 07 18 07 09 09 07 09 12 or 13 07 09 18 07 12 or 13 12 or 13 07 12 or 13 18 07 18 18 09 09 09 09 09 12 or 13 09 09 18 09 12 or 13 12 or 13 09 12 or 13 18 09 18 18 12 or 13 12 or 13 12 or 13 12 or 13 12 or 13 18 07 07 07 07 07 07 07 09 07 07 07 12 or 13 07 07 07 18 07 07 09 09 07 ...

Страница 4: ...91 2 00 5 20 5 36 7 40 10 21 10 21 89 90 89 90 89 90 89 90 89 90 4 72 4 86 6 71 9 26 9 26 Outdoor unit power consumption kW 07 09 12 07 12 09 09 Indoor units combination Unit B Unit A Heating capacity kW Total 220V 240V Current A Power factor 3 3 3 6 4 0 2 7 2 9 3 1 2 9 3 3 2 0 4 0 3 6 2 0 4 5 4 0 2 2 4 7 5 8 2 1 5 8 5 8 2 0 5 8 1 45 0 69 1 60 1 47 0 69 1 62 1 63 0 69 1 69 1 785 0 69 1 785 1 785 0...

Страница 5: ...3 0 8 8 6 6 3 7 8 1 7 2 3 7 8 5 8 0 3 7 9 0 8 0 3 7 9 0 7 8 3 7 8 8 8 0 3 7 9 0 8 0 3 7 9 0 8 0 3 7 9 0 8 0 3 7 9 0 8 0 3 7 9 0 1 00 0 96 1 14 1 77 0 96 1 36 1 42 1 00 1 63 1 84 1 00 1 99 1 63 1 30 2 03 1 88 1 30 2 23 2 38 1 30 2 98 2 74 1 30 2 98 2 13 1 30 2 43 2 63 1 30 2 88 3 29 1 30 3 60 3 38 1 30 3 60 3 38 1 30 3 60 3 38 1 30 3 60 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 ...

Страница 6: ...23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 3 23 1 30 3 96 2 0 2 4 2 9 3 5 2 2 2 8 3 2 2 6 3 0 2 1 2 7 3 1 2 45 2 0 2 6 3 0 2 35 2 67 3 4 3 8 3 0 ...

Страница 7: ...9 3 4 1 9 7 9 3 4 1 9 7 9 3 4 1 9 7 9 3 4 1 9 7 9 3 5 2 10 6 9 3 5 2 10 6 9 3 5 2 10 6 9 3 5 2 10 6 9 3 5 2 10 6 9 3 5 2 10 6 9 3 5 2 10 6 9 3 5 2 10 6 9 3 5 2 10 6 9 3 5 2 10 6 1 20 0 91 1 28 1 43 0 91 1 51 1 79 0 94 1 88 2 10 0 94 2 21 1 98 1 13 2 18 2 23 1 13 2 33 2 82 1 13 2 96 2 82 1 13 2 96 2 38 1 13 2 54 2 82 1 13 2 96 2 82 1 13 2 96 2 82 1 13 2 96 2 82 1 13 2 96 2 82 1 13 2 96 2 78 1 19 2 ...

Страница 8: ...2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 78 1 19 2 96 2 32 2 7 3 3 3 6 2 5 3 3 3 7 2 95 3 3 2 4 3 2 3 6 2 9 2 32 3 15 3 45 2 8 3 1 4 0...

Страница 9: ...tlet Thermistor Model m m m m kW dB kW W dB W A W A A A mm mm mm kg kg cc mm mm W W rpm K h A Capacity Sound level Capacity Booster heater Sound level Height Width Depth Liquid pipe Gas pipe Connection method Compressor Fan motor Model Output Winding resistance at 20 Model Output Winding resistance at 20 RT61 at 25 RT62 at 100 RT63 at 70 RT64 at 25 RT65 at 25 RT66 67 at 25 Capacity System Electric...

Страница 10: ...t 20 RT61 at 100 RT62 at 25 RT63 at 50 RT64 at 25 RT65 at 25 RT70 66 67 68 69 at 25 Capacity System Electrical data 1 Outdoor unit 3 4 Max 60 Max 25 Max 10 Max 10 8 0 1 8 9 0 45 47 9 3 2 1 10 6 46 48 Single phase 220 240V 50Hz 16 31 4 85 20 00 14 95 4 44 18 33 90 25 16 31 14 95 0 4 Munsell 5Y 8 1 900 900 320 35 83 5 4 2 1070cc MS 32 2 core 1pc 2 0mm 12 7 2pcs 9 52 2pcs 6 35 4pcs Flared 2 Inner the...

Страница 11: ... hole Drain hole Base bolt M10 Base bolt M10 2 Oval hols 12 13 2 U Shape noched hols 33 524 339 302 524 77 2 25 12 17 R 6 40 116 A B 57 107 57 57 505 30 870 650 10 Max 10 units Air in Air in Air out 185 185 500 362 10 10 500 500 100 500 10 200 330 39 5 27 5 17 15 Leave front clearance fully Space for servicing Leave overhead clearance fully Rear piping hole Rear air intake Side air intake Handle f...

Страница 12: ...out 200 200 387 355 27 40 16 16 500 Veranda Base Rubber cushion More than 500 Note Leave front and both sides clearance fully Note Leave front and overhead clearance fully Note Leave front overhead and both clearance fully 2 12 36 Oval hole 23 10 35 320 900 88 460 50 900 350 0 480 8 531 3 317 23 33 Handle for moving Air in Indoor and outdoor connect wiring Air in 23 45 hole D unit connection C uni...

Страница 13: ...P BvP BuP BLU RED RED WHT BLK RED WHT BLK 21S4 RED RED X67 X60 HPS CN683 CN63 CN701 CN671 CN641 CN681 CN661 BLK WHT ORN GRY GRY GRY GRY BLK BLK GRY GRY GRY GRY GRY GRY RED RED GRN YLW RED BLU YLW RED BRN RED ORN YLW GRN BLU L MF MC V W U WHT WHT C65 ELECTRONIC CONTROL P C BOARD 1 2 1 2 2 4 3 2 1 8 7 6 5 1 1 FUSE2 TAB91 CN731 CN621 LD64 BLK DS63 TR 6 1 2 3 4 1 2 1 2 2 3 4 1 4 3 2 1 2 3 4 5 1 2 3 4 ...

Страница 14: ...ONIC CONTROL P C BOARD MC MODELS MXZ 32NV MXZ 32NV E2 E1 SYMBOL C61 C62 63 C65 CH CT61 62 DS61 DS62 F801 F911 L L61 LEV A D R RT61 RT62 RT63 RT64 SYMBOL RT65 RT66 67 RT68 69 MC MF61 SSR61 62 SSR63 T801 TB2 3 4 X61 62 63 X64 65 X66 67 21S2 21S4 63H1 63H2 63L NAME POWER FACTOR CAPACITOR SMOOTHING CAPACITOR OUTDOOR FAN CAPACITOR CRANKCASE HEATER CURRENT TRANSFORMER DIODE MODULE DIODE STACK FUSE 1A FU...

Страница 15: ...MXZ 18NV MXZ 18NV E2 E1 Indoor unit D Ball valve with service port Ball valve with service port Distributor Strainer Strainer LEV Oil separator Compressor High pressure switch 1 Suction temperature thermistor Low pressure switch Accumlator Capillary tube Capillary tube Capillary tube Reversing valve 2 way valve Discharge temperature thermistor Evaportation temperature thermistor RT67 Defrost therm...

Страница 16: ...ending point 30 It does not matter which unit is higher a b c d Outdoor unit Indoor units H H H 8 2 MAX REFRIGERANT PIPING LENGTH MXZ 18NV MXZ 18NV E2 E1 Piping length for each indoor unit a b 20m Total piping length a b 30m Height difference between units H 7m Bending point for each unit 15 Total bending point 30 It does not matter which unit is higher a b Outodoor unit H H H ...

Страница 17: ...t A Gas 12 7 1 2 Liquid 6 35 1 4 Indoor unit B Gas 12 7 1 2 Liquid 6 35 1 4 Indoor unit C Gas 9 52 3 8 Liquid 6 35 1 4 Indoor unit D Gas 9 52 3 8 Unit mm inch 8 3 PIPE SIZE SELECTION MXZ 18NV MXZ 18NV E2 E1 Refrigerant pipe diameter is different according to indoor unit to be connected When using extension pipes refer to the table below When diameter of refrigerant pipe is different from that of o...

Страница 18: ...it as is for one or two minutes Make sure the pointer of the gauge manifold valve remains in the same position Remove the cape from the stop valves of the outdoor unit liquid pipe and gas pipe Pull the handle towards you with a finger Turn it one fourth turn counterclockwise to obtain the full open position Remove the cape manifold valve quickly from the service port of the stop valve Tishten the ...

Страница 19: ... Tighten the service port cap 1 12 turn more from where the tightening torque is suddenly increased It is equivalent to a tightening torque of 13 7 to 17 7N m 140 to 180kgf cm Tighten the service port cap 1 12 turn more from where the tightening torque is suddenly increased It is equivalent to a tightening torque of 19 6 to 29 4N m 200 to 300kgf cm Stop valve gas side Service port Valve knob Lo Va...

Страница 20: ...re difference on the left side of the chart on next page shows the difference between the indoor intake air wet bulb temperature and the indoor discharge air wet bulb temperature for your reference at service How to measure the indoor air wet bulb temperature difference 1 Attach at least 2 sets of wet and dry bulb thermometers to the indoor air intake as shown in the figure and at least 2 sets of ...

Страница 21: ...nput 1 5 1 0 0 5 30 40 50 60 70Hz Frequency HEAT Capacity 1 5 1 0 0 5 Frequency HEAT Total input Frequency COOL Capacity 1 5 1 0 0 5 30 40 50 60 70 80Hz Frequency COOL Capacity Frequency COOL Total input Frequency HEAT Capacity Frequency HEAT Total input 1 5 1 0 0 5 30 40 50 60 70 80Hz Frequency COOL Total input 1 5 1 0 0 5 30 40 50 60 70 80Hz Frequency HEAT Capacity 1 5 1 0 0 5 30 40 50 60 70 80H...

Страница 22: ...60Hz Frequency COOL Capacity 1 5 1 0 0 5 30 40 50 60 70 80Hz Frequency COOL Capacity 1 5 1 0 0 5 30 40 50 60Hz Frequency COOL Total input 1 5 1 0 0 5 30 40 50 60Hz Frequency HEAT Capacity 1 5 1 0 0 5 30 40 50 60Hz Frequency HEAT Total input 1 5 1 0 0 5 30 40 50 60 70 80Hz Frequency COOL Total input 1 5 1 0 0 5 30 40 50 60 70 80Hz Frequency HEAT Capacity 1 5 1 0 0 5 30 40 50 60 70 80Hz Frequency HE...

Страница 23: ...mpressor starts running at 58Hz COOL HEAT 4 Indoor fan runs at HI speed and continues for 30 minutes 5 To cancel this operation press emergency run ON OFF button or any button on remote controller Indoor Outdoor Set air flow to Hi speed Inverter output frequency is 58Hz 2 HEAT operation DB C 20 0 WB C 14 5 DB C 2 7 15 20 0 WB C 1 6 12 14 5 0 6 0 5 0 4 0 3 0 2 18 20 25 30 32 o C 50 60 70 Ambient te...

Страница 24: ...t 58Hz COOL HEAT 4 Indoor fan runs at HI speed and continues for 30 minutes 5 To cancel this operation press emergency run ON OFF button or any button on remote controller 2Air flow speed HI 3Inverter output frequency 58Hz Indoor Outdoor Set air flow to Hi speed Inverter output frequency is 58Hz 2 HEAT operation DB C 20 0 WB C 14 5 DB C 2 7 15 20 0 WB C 1 6 12 14 5 0 6 0 5 0 4 0 3 0 2 18 20 25 30 ...

Страница 25: ...ing at 58Hz COOL HEAT 4 Indoor fan runs at HI speed and continues for 30 minutes 5 To cancel this operation press emergency run ON OFF button or any button on remote controller 2Air flow speed HI 3Inverter output frequency 58Hz Indoor Outdoor Set air flow to Hi speed Inverter output frequency is 58Hz 2 HEAT operation DB C 20 0 WB C 14 5 DB C 2 7 15 20 0 WB C 1 6 12 14 5 0 6 0 5 0 4 0 3 0 2 18 20 2...

Страница 26: ... located on indoor unit 2 Press emergency run ON OFF button 3 Compressor starts running at 58Hz COOL or 40Hz HEAT 4 Indoor fan runs at HI speed and continues for 30 minutes 5 To cancel this operation press emergency run ON OFF button or any button on remote controller Indoor Outdoor Set air flow to Hi speed Inverter output frequency is 40Hz 2 HEAT operation DB C 20 0 WB C 14 5 DB C 2 7 15 20 0 WB ...

Страница 27: ... Press emergency run ON OFF button 3 Compressor starts running at 58Hz COOL or 40Hz HEAT 4 Indoor fan runs at HI speed and continues for 30 minutes 5 To cancel this operation press emergency run ON OFF button or any button on remote controller 2Air flow speed HI 3Inverter output frequency 58Hz Indoor Outdoor Set air flow to Hi speed Inverter output frequency is 40Hz 2 HEAT operation DB C 20 0 WB C...

Страница 28: ...Press emergency run ON OFF button 3 Compressor starts running at 58Hz COOL or 40Hz HEAT 4 Indoor fan runs at HI speed and continues for 30 minutes 5 To cancel this operation press emergency run ON OFF button or any button on remote controller 2Air flow speed HI 3Inverter output frequency 58Hz Indoor Outdoor Set air flow to Hi speed Inverter output frequency is 40Hz 2 HEAT operation DB C 20 0 WB C ...

Страница 29: ...2 Press emergency run ON OFF button 3 Compressor starts running at 58Hz COOL or 40Hz HEAT 4 Indoor fan runs at HI speed 5 To cancel this operation press emergency run ON OFF button or any button on remote controller Air flow speed HI Inverter output frequency 58Hz Indoor Outdoor Set air flow to Hi speed Inverter output frequency is 58Hz 2 HEAT operation DB C 20 0 WB C 14 5 DB C 2 7 15 20 0 WB C 1 ...

Страница 30: ...temperature thermistor RT62 Accumulator Evaporation temperature thermistor RT67 Capillary tube Outdoor fan motor Defrost thermistor RT61 Expansion valve B Expansion valve A Indoor unit A Indoor unit B Indoor unit A Room A Gas pipe temperature thermistor Room B Gas pipe temperature thermistor Indoor unit B Indoor unit A Indoor unit B Refrigerant circuit Electronic controls 4 Way valve relay Outdoor...

Страница 31: ...cumlator Suction temperature thermistor Crankcase heater Comp L P S Inner thermostat H P S Discharge temperature thermistor Indoor Unit A Evaporation temperature thermistor Outdoor fan motor x 61 x 62 x 63 Defrost thermistor LEV1 LEV2 LEV3 LEV4 Indoor Unit B Indoor Unit C Indoor Unit D Outdoor unit control microprocessor Compressor primary current Compressor secondary current MXZ 32NV MXZ 32NV E2 ...

Страница 32: ...eat and the discharge temperature Thermostat ON in HEAT mode LEV opening Thermostat ON in DRY mode Thermostat OFF in COOL or DRY mode Thermostat OFF in HEAT mode All indoor units OFF 52 500 pulse Indoor unit status COOL 5 pulse HEAT 59 pulse COOL 5 pulse HEAT 49 pulse Refer to the standard LEV opening as shown below Thermostat ON in COOL mode Before shutdown 350 pulse Outdoor unit ON Indoor unit O...

Страница 33: ... minimum value obtained in step 2 the difference of each S H HEX S H HEX i is calculated as follows S H HEX i S H HEX i S H HEX min 4 Each LEV opening is controlled based on S H HEX i obtained in step 4 S H HEX i and LEV control width Range of S H HEX i LEV variation for corresponding unit S H HEX i 3 deg 0 3 S H HEX i 6 deg 1 6 S H HEX i 9 deg 2 9 S H HEX i 3 Suction superheat S H Cooling Cooling...

Страница 34: ...Hz in one minute After that the operational frequency will return to the variable status 2 LEV opening The LEV opening varies according to the operation signal given from the operating indoor unit s When the number of operating indoor units is reduced during heating operation the LEV opening will be fixed to the current valve for one minute After that the LEV opening will return to the variable st...

Страница 35: ... MXZ 18NV E2 MXZ 18NV E1 1 2 3 4 1 2 3 4 2 3 4 5 6 7 8 30 35 40 40 52 73 90 110 120 120 40 58 75 75 40 52 58 75 105 102 102 Number of operating unit Minimum DRY mode Maximum Rating 1 2 07 or 09 12 07 12 or 09 09 34 34 58 66 80 43 43 43 58 76 Number of operating unit Minimum DRY mode Maximum Rating Indoor unit capacity class 1 2 09 09 09 34 34 58 80 43 43 43 76 Indoor unit capacity class ...

Страница 36: ...or are controlled according to the indoor coil temperature When it rises to nearly 50 C the operational frequency will be fixed to the value at the moment and the outdoor fan speed will change to low When it rises to nearly 53 C the operational frequency will be reduced by 4 Hz from the current value and the 2 way valve will open 2 High pressure protection by high pressure switch H P S MXZ 18NV 63...

Страница 37: ...n to active the protection The protection starts when the low pressure switch turns ON that is the suction pipe pressure falls to 0 05 0 04MPa 0 5 0 4 kg cm2 or below Protect details The 2 way valve opens The compressor operational frequency decreases at a rate of 10 Hz minute The LEV opens at a rate of 20 pulse minute When such a status has continued for five minutes the compressor will turn OFF ...

Страница 38: ...e following conditions One or more indoor unit are standstill during heating operation It does not include the Thermostat OFF starts The discharge temperature rises to 107 C or above Sixty minutes or more have passed since the operation start up or the last refrigerant recovery Control details The LEV opening is controlled at 80 pulse for the non operating indoor unit s Conditions to discontinue r...

Страница 39: ...ide is blinking Operation start Remote controller and receiver board Causes in the indoor outdoor unit Incorrect wiring Serial signal error Serial signal Page 42 See note 1 NOTE1 In case of serial signal error the mis wiring indication will apper by turning the power off and turning it back on NOTE2 Enclosed by the broken line are the indoor unit related parts Inverter Compressor A to E Compressor...

Страница 40: ... short or open circuit occurs in the evaporation temperature thermistor during compressor running Check the characteristic of the evaporation temperature thermistor Refer to F F on page 46 Check the contact of P C board connectors Discharge temperature thermistor abnormality The compressor stops when a short or open circuit occurs in the discharge temperature thermistor during compressor running C...

Страница 41: ...en the compressor inner thermostat detects 130 C or above the compressor stops and restarts operation in 3 minutes Check the inverter output Refer to A to E Check the compressor Check the amount of gas Check the indoor unit air filter for clogging Check the indoor outdoor air flow for short cycle Defrost thermistor abnormality When a short or open circuit occurs in the defrost thermistor during he...

Страница 42: ...een pin 1 and pin 2 at connector CN601 When the indoor unit for Room B is indicating the serial signal error Is there voltage of 5 to 10 DC between pin 1 and pin 2 at connector CN602 When the indoor unit for Room C is indicating the serial signal error Is there voltage of 5 to 10 DC between pin 1 and pin 2 at connector CN603 When the indoor unit for Room D is indicating the serial signal error Is ...

Страница 43: ...ing valve coil Measure the resistance using a tester Part temperature 10 C 40 C Only MXZ 32NV Solenoid coil Normal abnormal 873Ω 1068Ω Opened or short circuited Measure the resistance using a tester Part temperature 10 C 40 C Linear expansion valve Lead wire color Normal WHT RED RED ORN YLW RED RED BLU 22 29Ω Abnormal Opened or short circuited Measure the resistance using a tester Part temperature...

Страница 44: ...t the transistor module Measure points Measure the AC voltage at the following six points on the transistor module BLK WHT WHT BLK BLK RED RED BLK WHT RED RED WHT Judgment Infinite Ω Normal Zero to dozens Ω Faulty Short B Checking the resistance of transistor module Operation mode Operational frequency Hz Output voltage V COOL 58 110 HEAT 40 70 ACV 300 BLK WHT ACV 300 BLK RED ACV 300 WHT RED ACV 3...

Страница 45: ...r unit Measuring point Count time from when the outdoor fan starts up until the inverter stops due to overcurrent Judgment Inverter stops in 0 to 10 seconds Faulty Short Inverter stops in 10 to 60 seconds Faulty Compressor lock Inverter stops in 60 seconds to 5 minutes Faulty Refrigerant circuit defective Inverter operates for 5 minutes or more Normal E Checking the compressor operation C Checking...

Страница 46: ... CN661 MXZ 32NV Defrost thermistor Discharge temperature thermistor Gas pipe temperature thermistor Suction Evaporation temperature thermistors Fin temperature thermistor Measure the resistance between pin1 and pin2 at CN663 MXZ 18NV pin1 and pin2 at CN661 MXZ 32NV Yes Yes Evaporator suction temperature thermistor 1 Connect the connections CN661 CN681 CN682 CN683 CN641 MXZ 18NV CN661 CN662 and CN6...

Страница 47: ...inutes after power on check the v oltage between pin3 and pin4 or CN913 on the noise filter board Is there voltage of 220 to 240V AC No Sorenoid coil lead wire defective Poor contact of connector Sorenoid coil damaged Yes Outdoor control board or outdoor relay board defective I Checking the solenoid coil Only MXZ 32NV The inverter does not operate Turn on power to the outdoor unit Is there voltage...

Страница 48: ...ect connection of indoor units results in no cooling heating In the all unit operation however the system seems to operate normally even if wires or pipes are connected incorrectly Therefore use the single unit operation not the all unit operation to check mis wiring or mis piping Check of mis wiring or mis piping The following symptoms appears if wires or pipes are wrongly connected In the single...

Страница 49: ...Outdoor fan solenoid valve power supply input 220 240V AC Fuse 3 15A Measure the voltage under the condition of the connector pluging Solenoid valve 220 240V AC 220 240V AC Outdoor fan Hi 220 240V AC Fin temperature Fin temperature thermistor RT 63 Fuse 3A Power supply input 330V DC 2 3V DC 2 3V DC 12V DC Power supply Relay X64 20 10 0 10 20 30 40 100 90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 ...

Страница 50: ...50 MXZ 18NV MXZ 18NV Relay P C board E2 E1 Short Normal Open Abnomal 220 240V AC Fuse 3 15A ...

Страница 51: ...ction temperature thermistor 0 3 0 6V DC Defrost temperature thermistor 2 5 4 0V DC 12V DC 5V DC 0 5V DC LED monitor indication Gas pipe temerature thermistor 2 5 4 0V DC Room A Room D Room C Room B High pressure switch Low pressure switch Compressor inner thermo Liner expansion valve LEV 12V DC puls wave 2 way valve 12V DC Outdoor fan Me 12V DC 4 way valve 12V DC Outdoor fan Lo 12V DC crank case ...

Страница 52: ... C board I P M P C board Relay P C board Short 12V DC High pressure switch 12V DC 12V DC 12V DC 320V DC 230V AC OUTPUT 230V AC INPUT OUTDOOR FAN 230V AC CRANK CASE HEATER 230V AC 2 WAY VALVE 230V AC 4 WAY VALVE 230V AC ...

Страница 53: ...ove the terminal cover to disconnect the lead wires from the compressor terminals 13 Detach the welded section of the compressor suction pipe and discharge pipe See Photo 4 14 Remove the compressor nuts to remove the compressor 11 2 OUTDOOR UNIT MXZ 18NV MXZ 18NV E2 E1 Photo 3 Photo 1 Photo 2 Photo 4 NOTE on the wiring diagram shows the terminals with a lock mechanism so it cannot be removed when ...

Страница 54: ...the outdoor fan motor 1 Remove the top panel service panel and front panel 2 Disconnect the connector CN63 TAB91 from the outdoor electronic control P C board 3 Remove the propeller 4 Remove the outdoor fan motor Photo 4 Propeller Fan motor ...

Страница 55: ... joints of the compressor suction and discharge pipes See Photo 3 10 Remove the three compressor nuts and remove the compressor Photo 1 Top panel Service panel Front panel 2 Removing the fan motor 1 Remove the top panel five screws the service panel four screws and the front panel two screws See Photo 1 2 Disconnect the connector CN911 on the outdoor controller board 3 Remove the propeller 4 Remov...

Страница 56: ...linear expansion valve 1 Remove the service panel See Photo 1 Gas release is not required if the unit is pumped down 2 Remove the coil of linear expansion valve 3 Detach the brazed joint of linear expansion valve and pipe 5 Removing the reactor 1 Remove the five screws of the top panel and remove it See Photo 1 2 Disconnect the reactor lead wire 3 Remove the two screws of the reactor and take it o...

Страница 57: ...J4 290 T2W A70 009 T2W A69 009 T2W A70 515 T2W A70 212 T92 669 452 FRONT PANEL FAN GUARD TOP PANEL SERVICE PANEL SIDE PANEL REAR PANEL REAR GUARD OUTDOOR HEAT EXCHANGER BASE ASSEMBLY HANDLE HANDLE MOTOR SUPPORT LABEL COMPRESSOR MC 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 No Parts Name Symbol in Wiring Diagram Parts No Q ty unit MXZ 18NV Remarks RHV 207FEM E1 E2 13 PARTS LIST ...

Страница 58: ...PELLER OUTDOOR FAN MOTOR EXPANSION VALVE COIL EXPANSION VALVE COIL EXPANSION VALVE UNION 3 8F UNION 1 4F BALL VALVE 3 8 REVERSING VALVE HIGH PRESSURE SWITCH ACCUMULATOR MUFFLER CAPILLARY TUBE 4 0 2 4 2000 CAPILLARY TUBE 2 0 0 6 1000 MF LEV A LEV B HPS 1 1 1 1 2 2 2 2 1 1 1 1 1 1 1 1 1 1 2 2 2 2 1 1 1 1 1 1 No Parts Name Symbol in Wiring Diagram Parts No Q ty unit MXZ 18NV Remarks RA6V50 4 0 2 4 30...

Страница 59: ...K SMOOTHING CAPACITOR POWER FACTOR CAPACITOR NOISE FILTER FIN TEMPERATURE THERMISTOR POWER TRANSISTOR MODULE TERMINAL BLOCK TERMINAL BLOCK ELECTRONIC CONTROL P C BOARD ELECTRONIC CONTROL P C BOARD RELAY P C BOARD REACTOR R V COIL SUCTION TEMPERATURE THERMISTOR DEFROST TEMPERATURE THERMISTOR DISCHARGE TEMPERATURE THERMISTOR DISCHARGE TEMPERATURE THERMISTOR NOISE FILTER GAS PIPE TEMPERATURE THERMIST...

Страница 60: ...FACTOR CAPACITOR SMOOTHING CAPACITOR CONTROL P C BOARD NOISE FILTER BOARD TERMINAL BLOCK TERMINAL BLOCK RELAY GAS PIPE TEMPERATUR THERMISTOR FIN TEMPERATURE THERMISTOR H P SWITCH RESISTOR THERMISTOR SOLENOID COIL RELAY P C BOARD MF61 DS62 DS61 L C61 C62 C63 TB3 TB2 X64 RT66 67 68 69 RT63 63H2 R RT61 62 64 65 21S4 21S2 1 1 1 1 1 1 1 2 1 1 4 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 4 1 1 1 1 1 1 1 1 No P...

Страница 61: ...300 FRONT PANLE SERVICE PANEL SIDE PANEL TOP PANEL REAR GUARD REAR PANEL C COVER REVERSING VALVE L P SWICH H P SWICH 2 WAY VALVE UNION EXPANSION VALVE EXPANSION VALVE EXPANSION VALVE EXPANSION VALVE CRANKCASE HEATER BASE ASSEMBLY HEAT EXCHANGER COMPRESSOR 63L 63H1 MC 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 No Parts Name Symbol in Wiring Diagram Parts No Q ty...

Страница 62: ... CCopyright 1997 MITSUBISHI ELECTRIC ENGINEERING CO LTD Issued in Mar 1998 MEE No OB185 REVISED EDITION C 217 Issued in Oct 1997 MEE No OB185 REVISED EDITION B CD ROM Issued in Oct 1997 MEE No OB185 REVISED EDITION A 337 Issued in Feb 1997 MEE No OB185 2222 Printed in Japan New publication effective Mar 1998 Specifications subject to change without notice Model name MAC 451JP MAC 460JP MXZ 18NV Fo...

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