Page 1: Table Of Contents
R410A September 2023 No. OCHT810 TECHNICAL & SERVICE MANUAL REVISED EDITION-A <Outdoor unit> [Model Name] Note: • Specifications have been NTXMSM36A142BA changed in REVISED EDITION-A. NTXMSM48A182BA OCHT810 is void. NTXMSM60A182BA NTXMSH36A142BA NTXMSH42A152BA NTXMSH48A182BA CONTENTS 1. SAFETY PRECAUTION ······················· 2 2.
Page 2: Safety Precaution
SAFETY PRECAUTION 1-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuit must be disconnected. Precautions during the repair service Preparation before the repair service • Do not perform the work involving the electric parts with wet •...
Page 3 The refrigerant oil applied to flare and flange Use the specified refrigerant only. connections must be ester oil, ether oil or Never use any refrigerant other than that specified. alkylbenzene oil in a small amount. Doing so may cause a burst, an explosion, or fire when If large amount of mineral oil enters, that can cause the unit is being used, serviced, or disposed of.
Page 4 Cautions for refrigerant piping work New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.
Page 5: Overview Of Units
OVERVIEW OF UNITS 2-1. Auxiliary HEATING ON/OFF CONTROL SET-UP (1) Auxiliary heating operation controls another heat source that depends on the main system's operations, which means the interlock operation shown in "b)" will be possible. a) Indoor unit must be R410A UL model for this function to operate. b) Different Indoor unit applications that can be applied: 4 way Ceiling...
Page 6 (4) Determine fan speed setting during indoor thermo-OFF conditions: a) These settings are done within Indoor DIPSW1-7 and DIPSW1-8, see chart below for options. b) Recommended SW1-7 OFF and SW1-8 ON will determine airflow based on "Setting on the remote controller". Auxiliary heating Fan speed Fan speed...
Page 7 (6) Locally procured wiring A basic connection method is shown. (i.e. interlocked operation with the electric heater with the fan speed setting on high) Indoor unit Outdoor unit Remote control Board Relay circuit control board control board Adapter Dip switch SW5-4 "ON"...
Page 8 2-2. SYSTEM CONSTRUCTION Outdoor unit 4.5HP NTXMSM36A142BA NTXMSM48A182BA NTXMSH42A152BA NTXMSM60A182BA NTXMSH36A142BA NTXMSH48A182BA Applicable Capacity 04 to 36 04 to 54 04 to 72 indoor unit Number of units 1 to 11 1 to 12 Total system 50 to 130% of outdoor unit capacity...
Page 9 When 1 or more TPLA0A0 units is connected, the number of the maximum connectable indoor units is decreased as follows: 3 for NTXMSM36A142BA and NTXMSH36A142BA, 4 for NTXMSH42A152BA, and 6 for NTXMSM48A182BA, NTXMSH48A182BA and NTXMSM60A182BA Only NTXMSM36/48 and NTXMSH36/42/48 are connectable.
Page 10 2-4. SYSTEM SPECIFICATIONS (1) Outdoor Unit Outdoor Model name NTXMSM36A142BA NTXMSH36A142BA NTXMSH42A152BA NTXMSM48A182BA NTXMSH48A182BA NTXMSM60A182BA unit Capacity Cooling (kBtu/h) Heating (kBtu/h) Cooling/Heating capacity indicates the maximum value at operation under the following condition. Cooling Indoor D.B. 80°F/W.B. 67°F: [D.B. 26.7°C/W.B. 19.4°C] Outdoor D.B.
Page 11: Specifications
DC control Motor output 0.074 × 2 External static press. Compressor Type × Quantity Scroll hermetic compressor x 1 Manufacture Mitsubishi Electric Corporation Starting method Inverter Motor output Case heater Lubricant FV50S 78oz. (2.3L) External finish Galvanized Steel Sheet <Munsell 3Y 7.8/ 1.1>...
Page 12 DC control Motor output 0.074 × 2 External static press. Compressor Type × Quantity Scroll hermetic compressor × 1 Manufacture Mitsubishi Electric Corporation Starting method Inverter Motor output Case heater Lubricant FV50S 78oz. (2.3L) External finish Galvanized Steel Sheet <Munsell 3Y 7.8/ 1.1>...
Page 13 DC control Motor output 0.200 × 2 External static press. Compressor Type × Quantity Scroll hermetic compressor x 1 Manufacture Mitsubishi Electric Corporation Starting method Inverter Motor output Case heater Lubricant FVC68D 78oz. (2.3L) External finish Galvanized Steel Sheet <Munsell 3Y 7.8/ 1.1>...
Page 14: Data
DATA 4-1. SELECTION OF COOLING/HEATING UNITS How to determine the capacity when less than or equal 100% indoor model size units are connected in total: The purpose of this flow chart is to select the indoor and outdoor units. For other purposes, this flow chart is intended only for reference. Determine the load (L) and the Indoor/Outdoor Temperature Temporarily select the Indoor/Outdoor Units...
Page 15 How to determine the capacity when greater than 100% indoor model size units are connected in total: The purpose of this flow chart is to select the indoor and outdoor units. For other purposes, this flow chart is intended only for reference. Determine the load (L) and the Indoor/Outdoor Temperature Temporarily select the indoor/outdoor units...
Page 16 (3) Selection of Outdoor Unit Figure 1 Indoor unit temperature correction The capacity class 36 is selected as total indoor units capacity is 33. To be used to correct indoor unit only NTXMSM36A142BA 36.0 kBtu/h Indoor Temperature (4) Total Indoor Units Capacity Correction Calculation Room1 Indoor Design Wet Bulb Temperature Correction (68.0ºF)
Page 17 (7) Comparison with Essential Load Against the essential load 30.3 kBtu/h, the maximum system capacity is 32.4 kBtu/h: Proper outdoor units have been selected. (8) Calculation of Maximum Indoor Unit Capacity of Each Room CTx = CTi, thus, calculate by the calculation below Room1 Indoor Unit Rating ×...
Page 18 (3) Selection of Outdoor Unit Figure 4 Indoor unit temperature correction The capacity class 36 is selected when the total indoor units capacity is 33. To be used to correct indoor unit only NTXMSM36A142BA 41.0 kBtu/h (4) Total Indoor Units Capacity Correction Calculation Indoor...
Page 19 3. Power input of outdoor unit Outdoor unit: NTXMSM36A142BA Indoor unit 1: TPEFY015 Indoor unit 2: TPEFY018 <Cooling> (1) Rated power input of outdoor unit 2.40 kW (2) Calculation of the average indoor temperature power input coefficient Coefficient of the outdoor unit for indoor unit 1 (Outdoor temp. 98.6°F [37.0°C] D.B., Indoor temp. 68.0°F [20.0°C] W.B.) 1.04 (Refer to “4-2.
Page 20 4-2. CORRECTION BY TEMPERATURE CITY MULTI could have varied capacity at different designing temperature. Using the nominal cooling/heating capacity value and the ratio below, the capacity can be observed at various temperature. <Cooling> Figure 7 Indoor unit temperature correction To be used to correct indoor unit capacity only 60.8 62.6 64.4...
Page 21 <Heating> NTXMSM36A142BA NTXMSM48A182BA NTXMSM60A182BA Figure 9 Indoor unit temperature correction To be used to correct indoor unit capacity only [°F D.B.] 60.8 62.6 64.4 66.2 69.8 71.6 73.4 75.2 78.8 80.6 [°C D.B.] Indoor Temperature Figure 10 Outdoor unit temperature correction...
Page 22 <Heating> NTXMSH36A142BA NTXMSH42A152BA NTXMSH48A182BA Figure 11 Indoor unit temperature correction To be used to correct indoor unit capacity only 60.8 62.6 64.4 66.2 69.8 71.6 73.4 75.2 78.8 80.6 [°F D.B.] [°C D.B.] Indoor Temperature Figure 12 Outdoor unit temperature correction To be used to correct outdoor unit capacity only Indoor Temperature [°F W.B.]...
Page 23 4-3. STANDARD OPERATION DATA (REFERENCE DATA) Operation NTXMSM36A142BA NTXMSM48A182BA NTXMSM60A182BA Operating Ambient Indoor 80°F/67°F 70°F/60°F 80°F/67°F 70°F/60°F 80°F/67°F 70°F/60°F conditions temperature [26.7°C / [21.1°C/15.6°C] [26.7°C/19.4°C] [21.1°C/15.6°C] [26.7°C/19.4°C] [21.1°C/15.6°C] 19.4°C] DB/WB Outdoor 95°F/ 75°F 95°F/75°F 47°F / 43°F 47°F/43°F 95°F/75°F 47°F/43°F [35.0°C /...
Page 24 4-4. STANDARD CAPACITY DIAGRAM Before calculating the sum of total capacity of indoor units, please convert the value into the kW model capacity following the formula on "4-1-1. Method for obtaining system cooling and heating capacity". 4-4-1. NTXMSM36A142BA NTXMSH36A142BA <Cooling>...
Page 25 4-4-2. NTXMSM36A142BA NTXMSH36A142BA <Heating> G(x) Total capacity of indoor units (kBtu/h) Total capacity of indoor units (kBtu/h) 208, 230 V Total capacity of indoor units (kBtu/h) OCHT810A...
Page 26 4-4-3. NTXMSH42A152BA <Cooling> G(x) Total capacity of indoor units (kBtu/h) Total capacity of indoor units (kBtu/h) 208, 230 V Total capacity of indoor units (kBtu/h) OCHT810A...
Page 27 4-4-4. NTXMSH42A152BA <Heating> G(x) Total capacity of indoor units (kBtu/h) 15.0 22.5 30.0 37.5 45.0 52.5 60.0 Total capacity of indoor units (kBtu/h) 208, 230 V 15.0 22.5 30.0 37.5 45.0 52.5 60.0 Total capacity of indoor units (kBtu/h) OCHT810A...
Page 28 4-4-5. NTXMSM48A182BA NTXMSH48A182BA <Cooling> G(x) Total capacity of indoor units (kBtu/h) Total capacity of indoor units (kBtu/h) 208, 230 V Total capacity of indoor units (kBtu/h) OCHT810A...
Page 29 4-4-6. NTXMSM48A182BA NTXMSH48A182BA <Heating> G(x) Total capacity of indoor units (kBtu/h) Total capacity of indoor units (kBtu/h) 208, 230 V Total capacity of indoor units (kBtu/h) OCHT810A...
Page 30 4-4-7. NTXMSM60A182BA <Cooling> G(x) Total capacity of indoor units (kBtu/h) Total capacity of indoor units (kBtu/h) 208, 230 V Total capacity of indoor units (kBtu/h) OCHT810A...
Page 31 4-4-8. NTXMSM60A182BA <Heating> G(x) Total capacity of indoor units (kBtu/h) Total capacity of indoor units (kBtu/h) 208, 230 V Total capacity of indoor units (kBtu/h) OCHT810A...
Page 32 (2) During heating, find the equivalent piping length, and find the capacity ratio corresponding to standard piping length from Figure 18. Then multiply by the heating capacity from Figure 9 and 10 in "4-2. CORRECTION BY TEMPERATURE" to obtain the actual capacity. (1) Capacity Correction Curve Figure 13 NTXMSM36A142BA NTXMSH36A142BA <Cooling> Total capacity of indoor unit 1.00...
Page 33 Figure 15 NTXMSM48A182BA NTXMSH48A182BA <Cooling> Total capacity of indoor unit 1.00 0.95 24 [kBtu/h] 0.90 0.85 0.80 36 [kBtu/h] 0.75 0.70 48 [kBtu/h] 0.65 62.4 [kBtu/h] 0.60 0.55 0.50 Piping equivalent length (ft) Figure 16 NTXMSM60A182BA <Cooling> Total capacity of indoor unit 1.00 0.95 30 [kBtu/h]...
Page 34 Figure 17 NTXMSM36A142BA NTXMSH36A142BA NTXMSH42A152BA NTXMSM48A182BA NTXMSH48A182BA <Heating> 1.00 0.95 0.90 0.85 0.80 0.75 0.70 Piping equivalent length (ft) Figure 18 NTXMSM60A182BA <Heating> 1.00 0.95 0.90 0.85 0.80 0.75 0.70 Piping equivalent length (ft) (2) Method for Obtaining the Equivalent Piping Length Equivalent length = (length of piping to farthest indoor unit) + (0.99 ×...
Page 35 4-6. NOISE CRITERION CURVES NTXMSM36A142BA NTXMSH42A152BA SPL(dB) SPL(dB) MODE LINE MODE LINE NTXMSH36A142BA COOLING COOLING HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS...
Page 36: Outlines And Dimensions
OUTLINES AND DIMENSIONS Unit: mm <inch> OCHT810A...
Page 37: Wiring Diagram
WIRING DIAGRAM NTXMSM36A142BA NTXMSM48A182BA LEV-A LEV-B MULTI. B. TH7 TH6 TH3 TH4 63LS 63HS MＦ1 is the switch position. t゜ t゜ t゜ t゜ t゜ 3～ SWU2SWU1 CN3D CN3S CN3N CNF1 （WH）（RD）（BU）（WH） 63HS TH7/6 （WH）（RD）（WH）（WH）...
Page 38 NTXMSM60A182BA LEV-A LEV-B MULTI. B. TH7 TH6 TH3 TH4 63LS 63HS MＦ1 is the switch position. t゜ t゜ t゜ t゜ t゜ 3～ SWU2SWU1 CN3D CN3S CN3N CNF1 （WH）（RD）（BU）（WH） 63HS TH7/6 SW9 1 （WH）（RD）（WH）（WH）（BK） MＦ2 CNLVA CNLVB...
Page 39 NTXMSH36A142BA NTXMSH42A152BA NTXMSH48A182BA LEV-A LEV-B MULTI. B. TH7 TH6 TH3 TH4 63LS 63HS MＦ1 is the switch position. t゜ t゜ t゜ t゜ t゜ 3～ SWU2SWU1 CN3D CN3S CN3N CNF1 （WH）（RD）（BU）（WH） 63HS TH7/6 SW9 1 （WH）（RD）（WH）（WH）...
Page 40: Necessary Conditions
NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION 7-1. TRANSMISSION SYSTEM SETUP OCHT810A...
Page 41 7-2. Special Function Operation and Settings for M-NET Remote Controller For the detailed procedure of "group settings" and "paired settings", refer to the remote controller's manuals. 7-3. REFRIGERANT SYSTEM DIAGRAM NTXMSM36A142BA NTXMSM48A182BA Refrigerant flow in cooling Refrigerant flow in heating...
Page 42 NTXMSH36A142BA NTXMSH42A152BA NTXMSH48A182BA Refrigerant flow in cooling Refrigerant flow in heating Thermistor (TH7) Check valve <Ambient> <High pressure> Service port 4-way valve Strainer Refrigerant Gas pipe Ball valve Solenoid valve (SV1) Oil separator Check valve High pressure sensor (63HS) Strainer <Low pressure>...
Page 43 NTXMSM36A142BA NTXMSM48A182BA Thermistor(TH-A to E) Check valve Thermistor(TH7) <Gas pipe temperature> <High pressure> <Ambient> Service port 4-Way Valve (21S4) Strainer Solenoid valve(SV1) Room temperature Ball valve <Bypass> thermistor Oil separator High pressure Check valve (TH1 or RT11) switch(63H) <Low pressure>...
Page 44 NTXMSM60A182BA Thermistor(TH-A to E) Check valve Thermistor(TH7) <High pressure> <Gas pipe temperature> <Ambient> Service port 4-Way Valve (21S4) Strainer Solenoid valve(SV1) Room temperature Ball valve <Bypass> thermistor Oil separator (TH1 or RT11) Check valve Strainer Strainer High pressure Capillary <Low pressure> Distributor switch(63H) tube1...
Page 45 7-4. SYSTEM CONTROL 7-4-1. Example for the System • Example for wiring control cables, wiring method and address setting, permissible lengths, and the constraint items are listed in the standard system with detailed explanation. A. Example of an M-NET remote controller system (address setting is necessary.) Example of wiring control cables Wiring Method and Address Setting a.
Page 46 • Name, Symbol and the Maximum Remote controller Units for Connection Name Symbol Maximum units for connection Outdoor unit — CITY MULTI M-IC Refer to "3. SPECIFICATIONS". series indoor unit M-NET remote M-NET RC Maximum 2 M-NET RC for 1 indoor unit, Maximum 12 M-NET RC for 1 OC controller Permissible Lengths Constraint items...
Page 47 B. Example of a group operation system with 2 or more outdoor units and an M-NET remote controller. (Address settings are necessary.) (51) M-IC M-IC M-IC M-IC (01) (02) (05) (06) M1 M2 S M1 M2 S M1 M2 S M1 M2 S M1 M2 S M1 M2 S...
Page 48 • Name, Symbol, and the Maximum Units for Connection • Maximum line length via outdoor unit: L ≤ 1640 ft [500 m] (AWG16 [1.25 mm² ]) • Indoor/outdoor transmission line Maximum length: L ≤ 656 ft [200 m] (AWG16 [1.25 mm²]) •...
Page 49 C. Example of an MA remote controller system (address setting is not necessary.) NOTE: In the case of same group operation, need to set the address that is only main CITY MULTI series indoor unit. Example of wiring control cables Wiring Method and Address Setting 1.
Page 50 Permissible Lengths Prohibited items The MA remote controller and the M-NET remote controller cannot be used together with Indoor/outdoor transmission line the CITY MULTI series indoor unit of the same group. Maximum length: M-NET remote controller cannot be connected without address setting. ≤...
Page 51 D. Example of a group operation with 2 or more outdoor units and an MA remote controller. (Address settings are necessary.) M-IC M-IC M-IC M-IC (51) (01) (02) (05) (06) TB15 TB15 TB15 TB15 M1 M2 S M1 M2 S M1 M2 S M1 M2 S M1 M2 S...
Page 52 • Name, Symbol, and the Maximum Units for Connection Maximum line length via outdoor unit (M-NET cable): L and L ≤ 1640 ft [500 m] (AWG 16 [1.25 mm²] or more) Indoor/outdoor transmission line Maximum length (M-NET cable): L and L and L and L ≤...
Page 53 E. Example of a system using Branch Box and A-Control indoor unit TB3A TB5/TB15 Branch Box A-IC MA-RC (01) TB3B TB5/TB15 A-IC MA-RC (02) (51) TB3C TB5/TB15 A-IC M1 M2 S M1 M2 S MA-RC (03) (01) TB3D A-IC WL-RC (04) TB3E A-IC...
Page 54 • Name, Symbol, and the Maximum Units for Connection Maximum line length via outdoor unit (M-NET cable): L ≤ 1640 ft [500 m] (AWG16 [1.25mm ] or more) Branch box/outdoor transmission line Maximum length (M-NET cable): L ≤ 656 ft [200 m] (AWG16 [1.25 mm ] or more) Indoor/branch box transmission line Maximum length (A-Control cable): L ≤...
Page 55: Troubleshooting
TROUBLESHOOTING 8-1. CHECKPOINTS FOR TEST RUN 8-1-1. Procedures before test run (1) Before a test run, make sure that the following work is completed. • Installation related: Make sure that the panel of cassette type and electrical wiring are done. Otherwise electrical functions like auto vane will not operate normally.
Page 56 8-1-2. Countermeasures For Error During Test Run If a problem occurs during test run, a code number will appear on the remote controller (or LED on the outdoor unit), and the air conditioning system will automatically cease operating. Determine the nature of the abnormality and apply corrective measures. Detected Unit Check Check...
Page 57 8-1-3. SELF-DIAGNOSIS ACTION BY FLOWCHART Check code 0403 Serial communication error or Model selection SW error (Ed) Abnormal points and detection methods Causes and checkpoints If serial communication between the outdoor multi controller circuit board Wire breakage or contact failure of connector CN2 or and outdoor power circuit board is defective.
Page 58 Check code Compressor temperature trouble 1102 (U2) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints (1) If the TH4 temperature becomes conditions as follows: Malfunction of stop valve Over-heated compressor operation caused by ●exceeds 230°F [110 ] continuously for 5 minutes shortage of refrigerant ●exceeds 257°F [125 ] Defective thermistor...
Page 59 Check code Compressor temperature trouble 1102 (U2) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Disconnect the thermistor wiring to check the resistance.
Page 60 Check code High pressure trouble or thermal protector trouble 1302 (UE) Chart 1 of 4 Abnormal points and detection methods Causes and checkpoints (1) High pressure abnormality (63H operation) Defective operation of stop valve (not fully open) Clogged or broken pipe If 63H operates(*) during compressor operation.
Page 61 Check code High pressure trouble or thermal protector trouble 1302 (UE) Chart 2 of 4 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Is the indoor unit filter clogged? Clean the filter.
Page 62 Check code High pressure trouble or thermal protector trouble 1302 (UE) Chart 3 of 4 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Is the resistance detected? Replace the TH7.
Page 63 Check code High pressure trouble or thermal protector trouble 1302 (UE) Chart 4 of 4 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Is the resistance detected? Replace the SV1.
Page 64 Check code Superheat due to low discharge temperature trouble 1500 (U7) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints If the discharge superheat is continuously detected −27°F [−15 ](*) or less Disconnection or loose connection of TH4 for 5 minutes even though the indoor LEV has minimum open pulse after Defective holder of TH4 the compressor starts operating for 10 minutes.
Page 65 Check code Superheat due to low discharge temperature trouble 1500 (U7) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Is the resistance detected? Replace the indoor LEV.
Page 66 Check code Refrigerant shortage trouble 1501 (U2) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints (1) When all of the following conditions have been satisfied for 15 Defective operation of stop valve (not fully open) consecutive minutes: Defective thermistor 1.
Page 67 Check code Refrigerant shortage trouble 1501 (U2) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Is the resistance detected? Replace the thermistor. Check the 63HS voltage.
Page 68 Check code Closed valve in cooling mode 1501 (U2) Abnormal points and detection methods Causes and checkpoints If stop valve is closed during cooling operation. Outdoor liquid/gas valve is closed. Mulfunction of outdoor LEV (LEV-A) (blockage) When both of the following temperature conditions have been satisfied for 20 minutes or more during cooling operation.
Page 69 Check code Freeze protection of Branch box or Indoor unit 1503 (P6) Abnormal points and detection methods Causes and checkpoints The purpose of the check code is to prevent indoor unit from freezing or Wrong piping connection between indoor unit and dew condensation which is caused when a refrigerant keeps flowing into branch box the unit in STOP.
Page 70 Check code 4-way valve trouble in heating mode 1508 (EF) Abnormal points and detection methods Causes and checkpoints If 4-way valve does not operate during heating operation. 4-way valve failure Disconnection or failure of 4-way valve coil When any of the following temperature conditions is satisfied for 3 minutes Clogged drain pipe or more during heating operation when the outdoor temperature is −4°F Disconnection or loose connection of connectors...
Page 71 Check code Out-of-range outside air temperature 3121 Abnormal points and detection methods Causes and checkpoints When the thermistor temperature of -24°F[-31.1°C] or below has Outdoor air temperature continuously been detected for 3 minutes during heating operation Thermistor failure (during compressor operation), the unit makes an error stop and "3121" Wire failure appears on the LED1 and LED2.
Page 72 Check code Compressor current interruption (Locked compressor) 4100 (UF) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints If overcurrent of DC bus or compressor is detected before 30 seconds Closed stop valve after the compressor starts operating. Decrease of power supply voltage Looseness, disconnection, or wrong phase of compressor wiring connection...
Page 73 Check code Compressor current interruption (Locked compressor) 4100 (UF) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Connect the wiring properly, then turn the Are they connected properly? power back ON.
Page 74 Compressor overcurrent interruption/failure in Check code 4210 12 VDC power supply circuit on power circuit board (UP) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints If overcurrent of compressor is detected after 30 seconds since the Closed outdoor stop valve Decrease of power supply voltage compressor starts operating.
Page 75 Compressor overcurrent interruption/failure in Check code 4210 12 VDC power supply circuit on power circuit board (UP) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page.
Page 76 Check code Voltage shortage /Overvoltage/PAM error/L1 open phase/ 4220 Primary current sensor error/Power synchronization signal error (U9) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints If any of following symptoms are detected; Decrease/increase of power supply voltage L1 open-phase (3-phase only) ●...
Page 77 Check code Voltage shortage/overvoltage/PAM error/L1 open phase/primary 4220 current sensor error/power synchronization signal error (U9) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. The black square (■) indicates a switch position. Diagnosis Remedy Continued from the previous page.
Page 78 Check code Heat sink temperature trouble 4230 (U5) Abnormal points and detection methods Causes and checkpoints If TH8 detects a temperature outside the specified range during Blocked outdoor fan compressor operation. Malfunction of outdoor fan motor Blocked airflow path TH8: Thermistor <Heat sink> Rise of ambient temperature Characteristic defect of thermistor Malfunction of input circuit on outdoor power board...
Page 79 Check code Power module trouble or overcurrent trouble 4250 (U6) Abnormal points and detection methods Causes and checkpoints If overcurrent of DC bus or compressor is detected 30 seconds after the Closed outdoor stop valve compressor starts operating. To determine the source of abnormality, Decrease of power supply voltage either the compressor or the power module, drive the power module Disconnection, looseness or conversed connection...
Page 80 Check code Fan trouble 4400 (U8) Abnormal points and detection methods Causes and checkpoints If no rotational frequency is detected, or detected a value outside the Malfunction of fan motor specified range during fan motor operation. Disconnection of CNF connector Defective outdoor controller board ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Page 81 Check code Compressor temperature thermistor (TH4) open/short 5101 (U3) <Detected in outdoor unit> Abnormal points and detection methods Causes and checkpoints If TH4 detects to be open/short. Disconnection or contact failure of connectors (The open/short detection is disabled for 10 minutes after compressor Characteristic defect of thermistor starts, during defrosting operation, or for 10 minutes after returning from Defective outdoor controller board...
Page 82 Check code Suction pipe temperature thermistor (TH6) open/short 5102 (U4) <Detected in outdoor unit> Abnormal points and detection methods Causes and checkpoints If TH6 detects to be open/short. Disconnection or contact failure of connectors (The open/short detection is disabled during 10 seconds to 10 minutes. Characteristic defect of thermistor after compressor starts, during defrosting operation, or for 10 minutes after Defective outdoor controller board...
Page 83 Check code Outdoor liquid pipe temperature thermistor (TH3) open/short 5105 (U4) Abnormal points and detection methods Causes and checkpoints If TH3 detects to be open/short. Disconnection or contact failure of connectors (The open/short detection is disabled during 10 seconds to 10 minutes. Characteristic defect of thermistor after compressor starts, during defrosting operation, or for 10 minutes after Defective outdoor controller board...
Page 84 Check code Ambient temperature thermistor (TH7) open/short 5106 (U4) Abnormal points and detection methods Causes and checkpoints If TH7 detects to be open/short Disconnection or contact failure of connectors Open: −40°F [−40 ] or less °C Characteristic defect of thermistor Short: 194°F [90 ] or more TH7: Thermistor <Ambient>...
Page 85 Check code HIC pipe temperature thermistor (TH2) open/short 5109 (U4) Abnormal points and detection methods Causes and checkpoints If TH2 detects to be open/short. Disconnection or contact failure of connectors Open: −40°F [−40 ] or less °C Characteristic defect of thermistor Short: 194°F [90 ] or more TH2: Thermistor <HIC pipe>...
Page 86 Check code Heat sink temperature thermistor(TH8) open/short 5110 (U4) Abnormal points and detection methods Causes and checkpoints If TH8 detects to be open/short. Disconnection or contact failure of connectors Open: −31.2°F [−35.1 ] or less Characteristic defect of thermistor Short: 338.5°F [170.3 ] or more Defective outdoor controller board TH8: Thermistor <Heat sink>...
Page 87 Check code High pressure sensor (63HS) trouble 5201 (F5) Abnormal points and detection methods Causes and checkpoints When the detected pressure in the high pressure sensor is 14 PSIG or Defective high pressure sensor less during operation, the compressor stops operation and enters into Decrease of internal pressure caused by gas an anti-restart mode for 3 minutes.
Page 88 Check code Low pressure sensor (63LS) trouble 5202 (F3) Abnormal points and detection methods Causes and checkpoints When the detected pressure in the low pressure sensor is −33 PSIG Defective low pressure sensor or less, or 329 PSIG or more during operation, the compressor stops Decrease of internal pressure caused by gas operation with a check code <5202>.
Page 89 Check code Primary current error 5300 (UH) Abnormal points and detection methods Causes and checkpoints If any of the following conditions is detected: Decrease/trouble of power supply voltage Primary current sensor detects any of the following conditions (single Disconnection of compressor wiring phase unit only): Current sensor trouble on outdoor power circuit board...
Page 90 Check code Duplex address error 6600 (A0) Abnormal points and detection methods Causes and checkpoints If 2 or more units with the same address are existing. There are 2 units or more with the same address in their controller among outdoor unit, indoor unit, Fresh Master, Lossnay or remote controller Noise interference on indoor/outdoor connectors ●Diagnosis of defects...
Page 91 Check code Transmission processor hardware error 6602 (A2) Abnormal points and detection methods Causes and checkpoints If the transmission line shows "1" although the transmission processor A transmitting data collision occurred because of a transmitted "0". wiring work or polarity change has performed while the power is ON on either of the indoor/outdoor unit, Fresh Master or Lossnay Malfunction of transmitting circuit on transmission...
Page 92 Check code Transmission bus BUSY error 6603 (A3) Abnormal points and detection methods Causes and checkpoints An abnormality when no transmission status caused by transmitting The transmission processor is unable to transmit data collision continues for 8 to 10 minutes. due to a short-cycle voltage such as noise is mixed An abnormality when data cannot be output on the transmission line on the transmission line.
Page 93 Check code Signal communication error with transmission processor 6606 (A6) Abnormal points and detection methods Causes and checkpoints If the data of unit/transmission processor were not normally transmitted. Accidental disturbance such as noise or lightning surge If the address transmission from the unit processor was not normally Hardware malfunction of transmission processor transmitted.
Page 94 Check code No ACK error 6607 (A7) Chart 1 of 4 Abnormal points and detection methods Causes and checkpoints Represents a common error detection The previous address unit does not exist since An abnormality detected by the sending side controller when receiving the address switch was changed while in electric no ACK from the receiving side, though signal was once sent.
Page 95 Check code No ACK error 6607 (A7) Chart 2 of 4 Abnormal points and detection methods Causes and checkpoints The cause of displayed address and attribute is on the Fresh Master While the indoor unit is operating with multi side. refrigerant system Fresh Master, an abnormality An abnormality detected by the indoor unit if receiving no ACK when is detected when the indoor unit transmits signal...
Page 96 Check code No ACK error 6607 (A7) Chart 3 of 4 Note: ●Diagnosis of defects When the address of the outdoor unit is displayed as abnormal, the Make sure to turn the power OFF before connecting/disconnecting outdoor circuit board may be faulty. If the unit is not restored after any connectors, or replacing boards.
Page 97 Check code No ACK error 6607 (A7) Chart 4 of 4 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards. Diagnosis Remedy Continued from the previous page. Apply the correct kind of transmission line, Is the correct kind of transmission then perform the procedure 1.
Page 98 Check code No response frame error 6608 (A8) Abnormal points and detection methods Causes and checkpoints If receiving no response command while already received ACK. Continuous failure of transmission due to noise etc The sending side searches the error in 30 seconds interval for 6 times Decline of transmission voltage/signal caused by continuously.
Page 99 Check code MA communication receive error 6831, 6834 (E0/E4) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints Detected in remote controller or indoor unit: Contact failure of remote controller wirings Irregular Wiring When the main or sub remote controller cannot receive signal from (A wiring length, number of connecting remote indoor unit which has the "0"...
Page 100 Check code MA communication receive error 6831, 6834 (E0/E4) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards Diagnosis Remedy Continued from the previous page. Refer to the chapter "Electrical Work".
Page 101 Check code MA communication send error 6832, 6833 (E3/E5) Chart 1 of 2 Abnormal points and detection methods Causes and checkpoints Detected in remote controller or indoor unit. There are 2 remote controllers set as main. Malfunction of remote controller sending/receiving circuit Malfunction of sending/receiving circuit on indoor controller board...
Page 102 Check code MA communication send error 6832, 6833 (E3/E5) Chart 2 of 2 ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards Diagnosis Remedy Continued from the previous page. Refer to the chapter "Electrical Work".
Page 103 Check code Total capacity error 7100 (EF) Abnormal points and detection methods Causes and checkpoints When the total capacity of connected indoor units exceeds the specified The total capacity of connected indoor units exceeds capacity (130% of the outdoor unit capacity), a check code <7100> is the specified capacity (without Branch Box / with displayed.
Page 104 Check code Capacity code error 7101 (EF) Abnormal points and detection methods Causes and checkpoints When the capacity of connected indoor unit is over, check code <7101> is The model name of connected indoor unit (model code) displayed. is read as incompatible. ●Diagnosis of defects Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Page 105 Check code Connecting excessive number of units and branch boxes 7102 (EF) Abnormal points and detection methods Causes and checkpoints When the connected indoor units exceed the limit, a check code <7102> is Connecting more indoor units than the limit. displayed.
Page 106 Check code Address setting error 7105 (EF) Abnormal points and detection methods Causes and checkpoints The address setting of outdoor unit or branch box is wrong. Wrongly set address of branch box The outdoor unit is not set in 000, or in the range of 51 to 100.
Page 107 Check code Incompatible unit combination error 7130 (EF) Abnormal points and detection methods Causes and checkpoints When the connected indoor unit is not compatible with the outdoor unit, Connecting indoor unit(s) which is not authorized to the outdoor unit detects the error at startup. connect to the outdoor unit.
Page 108 8-2. REMOTE CONTROLLER DIAGNOSIS Refer to "12-8. REMOTE CONTROLLER CHECK" for MA remote controller system. 8-3. REMOTE CONTROLLER TROUBLE For the troubleshooting, refer to the remote controller's manuals. 8-4. THE FOLLOWING SYMPTOM DO NOT REPRESENT TROUBLE (EMERGENCY) Symptom Display of remote controller CAUSE Even the cooling (heating) "Cool (Heat)"...
Page 109 8-5. INTERNAL SWITCH FUNCTION TABLE Continue to the next page OCHT810A...
Page 110 OCHT810A...
Page 111 8-6. OUTDOOR UNIT INPUT/OUTPUT CONNECTOR State (CN51) Distant control board Lamp power supply Relay circuit Procure locally External output adapter Max. 33 ft [10 m] CN51 (PAC-SA88HA-E) Outdoor unit control board : Error display lamp : Compressor operation lamp X, Y: Relay (coil rating: ≤ 0.9 W, 12 V DC) Auto change over (CN3N) Remote control panel Relay power supply...
Page 112 8-7. HOW TO CHECK PARTS Parts name Checkpoints Thermistor (TH2) Disconnect the connector then measure the resistance with a multimeter. <Hic pipe> (At the ambient temperature 50 to 80°F [10 to 30°C] Thermistor (TH3) Normal Abnormal <Outdoor liquid pipe> Thermistor (TH4) 160 to 410 k <Compressor>...
Page 113 Check method of DC fan motor (fan motor/outdoor multi controller circuit board) 1. Notes • High voltage is applied to the connecter (CNF1, 2) for the fan motor. Pay attention to the service. • Do not pull out the connector (CNF1, 2) for the motor with the power supply on. (It causes trouble of the outdoor multi controller circuit board and fan motor 2.
Page 114 Check method of multi controller circuit board Multi controller circuit board check Fuse check Check the fuse on multi controller circuit board Disconnect the FAN motor connector and (blow) measure the resistance of connector pins. Replace outdoor multi controller Did the fuse blow? Is the fan motor normal? circuit board (MULTI.B.).
Page 115 Check method of power circuit board Power circuit board check Note: To check the voltage of the parts on this board with a multimeter is difficult due to its location. Test points are limited. Is the voltage of main incoming power •...
Page 116 NTXMSM36A142BA M-NET power circuit board NTXMSM48A182BA Multi controller circuit board CNAC (RD) 208/230 V AC (WH) Power circuit board 208/230 V AC ± 10% 208/230 V AC ±10% COMP U-V 10–180 V AC V-W 10–180 V AC Multi controller circuit board W-U 10–180 V AC...
Page 117 8-8. HOW TO CHECK COMPONENTS <Thermistor feature chart> Low temperature thermistors • Thermistor <Hic pipe> (TH2) • Thermistor <Outdoor liquid pipe> (TH3) • Thermistor <Suction pipe> (TH6) • Thermistor <Ambient> (TH7) Thermistor R0 = 15 kΩ ± 3 % B constant = 3480 ± 1 % =15exp{3480( –...
Page 118 <LOW PRESSURE SENSOR> • Comparing the Low Pressure Sensor Measurement and Gauge Pressure By configuring the digital display setting switch (SW1) as shown in the figure below, the pressure as measured by the low pressure sensor appears on the LED1 on the control board. The figure at left shows that the switches 1 through 4 are set to ON and 5 through 8 are set to OFF.
Page 119 <HIGH PRESSURE SENSOR> • Comparing the High Pressure Sensor Measurement and Gauge Pressure By configuring the digital display setting switch (SW1) as shown in the figure below, the pressure as measured by the high pressure sensor appears on the LED1, 2 on the control board. The figure at left shows that the switches 1 through 4 are set to ON and 5 through 8 are set to OFF.
Page 120 8-9. TEST POINT DIAGRAM Outdoor multi controller circuit board <CAUTION> TEST POINT is high voltage. CN51 External signal Model selection Pump down Test run Manual defrost Model selection output CN102 Connect to the M-P.B (CN2) (M-NET power circuit board) Function selection CN40,CN41 Centralized control power Function selection...
Page 121 Outdoor power circuit board Brief Check of POWER MODULE If they are short-circuited, it means that they are broken. Measure the resistance in the following points (connectors, etc.). NTXMSM60A182BA NTXMSH36A142BA 1. Check of POWER MODULE NTXMSH42A152BA Check of DIODE circuit R - L1 , S - L1 , R - N1 , S - N1 NTXMSH48A182BA Check of IGBT circuit...
Page 122 Outdoor power circuit board Brief Check of POWER MODULE If they are short-circuited, it means that they are broken. NTXMSM36A142BA Measure the resistance in the following points (connectors, etc.). NTXMSM48A182BA 1. Check of POWER MODULE Check of DIODE circuit R - P1 S - P1 R - N1 S - N1...
Page 123 Outdoor noise filter circuit board NTXMSM60A182BA NTXMSH36A142BA NTXMSH42A152BA LI, NI NTXMSH48A182BA POWER SUPPLY Voltage of 208/230 V AC is input (Connect to the terminal block (TB1)) CNAC1 208/230 V AC Connect to the M-NET power circuit board (CN1) CNAC2 208/230 V AC Connect to the outdoor multi controller circuit board (CNAC)
Page 124 M-NET power circuit board Connect to the outdoor multi controller circuit board (CN102) – : 24–30 V DC – : 24–30 V DC Connect to the electrical parts box Connect to the outdoor power circuit board (CNAC1) – : 208/230 V AC OCHT810A...
Page 125 8-10. OUTDOOR UNIT FUNCTIONS OCHT810A...
Page 126 OCHT810A...
Page 127 OCHT810A...
Page 128 OCHT810A...
Page 129 OCHT810A...
Page 130 OCHT810A...
Page 131 OCHT810A...
Page 132 OCHT810A...
Page 133: Electrical Wiring
ELECTRICAL WIRING This chapter provides an introduction to electrical wiring for MULTI-S series, together with notes concerning power wiring, wir- ing for control (transmission wires and remote controller wires), and the frequency converter. 9-1. OVERVIEW OF POWER WIRING Use a separate power supply for the outdoor unit and indoor unit. Bear in mind ambient conditions (ambient temperature, direct sunlight, rain water, etc.) when proceeding with the wiring and connections.
Page 134 <When power is supplied to outdoor unit and branch box separately> 208/230V AC 60Hz 208/230V AC 60Hz L1/L2 S1/S2/S3 S1/S2/S3 L1/L2 L1/L2 S1/S2/S3 S1/S2/S3 S1/S2/S3 S1/S2/S3 A Switch (Breakers for Wiring and Current Leakage) B Outdoor Unit C Branch Box D A-Control Indoor Unit E CITY MULTI series Indoor unit F Pull Box...
Page 135 Minimum wire thickness (mm /AWG) Local switch (A) Total operating current Ground-fault interrupter Breaker for wiring of the indoor unit (If you use) (NFB) Main Cable Branch Ground Capacity Fuse F0 = 15 A or less 2.1/14 2.1/14 2.1/14 15 A current sensitivity F0 = 20 A or less 3.3/12 3.3/12...
Page 136 9-4. WIRING TRANSMISSION CABLES 9-4-1. Types of control cables 1. Wiring transmission cables Types of transmission cables Shielded wire CVVS, CPEVS, or MVVS Cable diameter More than 13.5 ft [1.25 mm Maximum wiring length Within 656 ft [200 m] 2. M-NET Remote control cables Types of remote control cable Shielded wire (2-core) CVVS, CPEVS, or MVVS Cable diameter...
Page 137 9-5. SYSTEM SWITCH SETTING In order to identify the destinations of signals to the outdoor units, indoor units, and remote controller of MULTI-S series, each microprocessor must be assigned an identification number (address). The addresses of outdoor units, indoor units, and remote controller must be set using their settings switches.
Page 138 9-7. METHOD FOR OBTAINING ELECTRICAL CHARACTERISTICS WHEN A CAPACITY AGREEMENT IS TO BE SIGNED WITH AN ELECTRIC POWER COMPANY The electrical characteristics of connected indoor unit system for air conditioning systems, including CITY MULTI series, depend on the arrangement of the indoor and outdoor units. First read the data on the selected indoor and outdoor units and then use the following formulas to calculate the electrical characteristics before applying for a capacity agreement with the local electric power company.
Page 139: Refrigerant Piping Tasks
REFRIGERANT PIPING TASKS 10-1. REFRIGERANT PIPING SYSTEM 10-1-1. NTXMSM36A142BA NTXMSH36A142BA NTXMSH42A152BA NTXMSM48A182BA NTXMSH48A182BA Outdoor Unit First Branch Indoor unit Line-Branch Method Connection Examples (Connecting to 4 Indoor Units) Total Piping Length A+B+C+a+b+c+d ≤ 984 ft [300 m] Permissible Farthest Piping Length A+B+C+d ≤...
Page 140 First Branch (A) Model number Model Piping Diameter (inch [mm]) Piping Diameter (inch [mm]) Section of (2) Sections From Branch to Liquid Line 1/4 [ø6.35] NTXMSM36A142BA Piping Liquid Line 3/8 [ø9.52] 018 or lower Indoor Unit (a,b,c,d) NTXMSM48A182BA Gas Line 1/2 [ø12.7]...
Page 141 Model Piping Diameter (inch [mm]) Model number Piping Diameter(inch [mm]) Each (2) Sections From Branch to Liquid Line 1/4 [ø6.35 ] Section of NTXMSM36A142BA Liquid Line 3/8 [ø9.52] 018 or lower Indoor Unit (a,b,c,d,e) NTXMSM48A182BA Piping Gas Line 1/2 [ø12.7]...
Page 142 10-1-2. NTXMSM60A182BA Line-Branch Method Connection Examples (Connecting to 4 Indoor Units) ℓ Outdoor Unit First Branch Indoor unit Total Piping Length A+B+C+a+b+c+d ≤ 492 ft [150 m] Permissible Farthest Piping Length A+B+C+d ≤ 262 ft [80 m] Length ℓ Farthest Piping Length After First Branch B+C+d ≤...
Page 143 Header-Branch Method Connection Examples (Connecting to 4 Indoor Units) Outdoor Unit First Branch Indoor unit Total Piping Length A+a+b+c+d ≤ 492 ft [150 m] Permissible Farthest Piping Length A+d ≤ 262 ft [80 m] Length Farthest Piping Length After First Branch 98 ft [30 m] High/Low Difference in Indoor/Outdoor Section 164 ft [50 m] (If the outdoor unit is lower, 131 ft [40 m])
Page 144 Note: Pipe re-branching after the header branching is not possible. Method of Combined Branching of Lines and Headers Connection Examples (Connecting to 5 Indoor Units) Outdoor unit First branching (branching joint) Branching joint Indoor unit Branching header Blind caps Total Piping Length A+B+C+a+b+c+d+e is 492 ft [150 m] Permissible Farthest Piping Length...
Page 145 ■ S elect Each Section of Refrigerant (1) Refrigerant Piping Diameter In Section From Outdoor Unit to Branch box (Outdoor Unit Piping Diameter) Piping Model Piping Diameter (inch[mm]) (1) Section From Outdoor Unit NTXMSM36A142BA Liquid Line 3/8 [ø9.52] Each to Branch box (A, B, C) NTXMSM48A182BA...
Page 146 10-2. PRECAUTIONS AGAINST REFRIGERANT LEAKAGE 10-2-1. Introduction R410A refrigerant of this air conditioner is non-toxic and non-flammable but leaking of large amount from an indoor unit into the room where the unit is installed may be deleterious. To prevent possible injury, the rooms should be large enough to keep the R410A concentration specified by ISO 5149-1 as follows.
Page 147: Disassembly Procedure
DISASSEMBLY PROCEDURE NTXMSM36A142BA NTXMSM48A182BA : Indicates the visible parts in the photos/figures. Note: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS/FIGURES Top panel fixing screws Photo 1 1. Removing the service panel and top panel Top panel (1) Remove 3 service panel fixing screws (5 × 12) and slide...
Page 148 From the previous page. OPERATING PROCEDURE PHOTOS/FIGURES Photo 5 (6) Remove 2 electrical parts box fixing screws (4 × 10) and Electrical parts box detach the electrical parts box by pulling it upward. The electrical parts box is fixed with 2 hooks on the left Hook and 1 hook on the right.
Page 149 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the thermistor <Outdoor liquid pipe> (TH3) and Photo 9 thermistor <Compressor> (TH4), thermistor <HIC pipe> (TH2) (1) Remove the service panel. (See Photo 1) (2) Disconnect the connectors, TH3 (white) and TH4 (white), TH2 (black) on the multi controller circuit board in the electrical parts box.
Page 150 OPERATING PROCEDURE PHOTOS/FIGURES 9. Removing bypass valve coil (SV1) and bypass valve Photo 11 (1) Remove the service panel. (See Photo 1) Linear expansion (2) Remove the top panel. (See Photo 1) valve coil (LEV-B) Linear (3) Remove the cover panel (front). (Refer to procedure 8 (5)) expansion valve (4) Remove the cover panel (rear).
Page 151 OPERATING PROCEDURE PHOTOS/FIGURES 13. Removing the compressor (MC) Photo 13 (1) Remove the service panel. (See Photo 1) Valve bed (2) Remove the top panel. (See Photo 1) (3) Remove the cover panel (front). (Refer to procedure 8(5)) Valve bed fixing screw (4) Remove the cover panel (rear) (Refer to procedure 8(6)) Comp felt...
Page 152 OPERATING PROCEDURE PHOTOS/FIGURES 15. Removing the reactor (DCL) Figure 3 (1) Remove the service panel. (See Photo 1) Reactors (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box (See photo 5) (4) Remove 6 screws (4 x 10) for reactors to remove the reac- tors.
Page 153 OPERATING PROCEDURE PHOTOS/FIGURES Photo 17 17.Removing the thermal protector (TRS)) Thermal protector (1) Remove the service panel. (See Photo 1) (TRS) (2) Remove the cover panel front. (See Photo 1) (3) Pull out the lead wire of high pressure switch and discon nect the connector, 63H (yellow) from the multi controller board in the electrical parts box.
Page 154 NTXMSM60A182BA Note: Turn OFF the power supply before disassembly. : Indicates the visible parts in the photos/figures. OPERATING PROCEDURE PHOTOS/FIGURES Top panel fixing screws 1. Removing the service panel and top panel Photo 1 (1) Remove 3 service panel fixing screws (5 × 12) and slide Top panel Service panel the hook on the right downward to remove the service...
Page 155 From the previous page. OPERATING PROCEDURE PHOTOS/FIGURES Photo 5 (6) Remove 2 electrical parts box fixing screws (4 × 10) then detach the electrical parts box by pulling it upward. The Electrical parts electrical parts box is fixed with 2 hooks on the left and 1 hook on the right.
Page 156 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the thermistor <Outdoor liquid pipe> (TH3) and Photo 9-1 thermistor <Compressor> (TH4), thermistor <HIC pipe> Thermistor (TH2) <Hic pipe> (TH2) (1) Remove the service panel. (See Photo 1) (2) Disconnect the connectors, TH3 (white) and TH4 (white), TH2 (black) on the multi controller circuit board in the electrical parts box.
Page 157 OPERATING PROCEDURE PHOTOS/FIGURES 9. Removing bypass valve coil (SV1) and bypass valve Photo 11 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove the cover panel (front). (Refer to procedure 8(5)) Bypass valve (4) Remove the cover panel (rear) (Refer to procedure 8(6)) Bypass valve...
Page 158 OPERATING PROCEDURE PHOTOS/FIGURES 13. Removing the compressor (MC) Photo 13 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove the cover panel (front). (Refer to procedure 8(5)) (4) Remove the cover panel (rear) (Refer to procedure 8(6)) (5) Remove the side panel (R).
Page 159 OPERATING PROCEDURE PHOTOS/FIGURES 14. Removing the accumulator Photo 15 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box. (See Photo 5) (4) Remove the valve bed. (See procedure 8 (4)) Inlet (5) Remove the cover panel (front).
Page 160 OPERATING PROCEDURE PHOTOS/FIGURES 16. Changing the fusible plug Photo 17 See the following descriptions. • Be careful not to expose the fusible plug to the braze torch flame or transfer heat to it. (See Photo 17) • The temperature of the fusible plug must not become 140°F Fusible plug (60°C) or more while working.
Page 161 NTXMSH36A142BA NTXMSH42A152BA NTXMSH48A182BA : Indicates the visible parts in the photos/figures. OPERATING PROCEDURE PHOTOS/FIGURES Photo 1 1. Removing the service panel and top panel Top panel fixing screws (1) Remove 3 service panel fixing screws (5 × 12), then slide Top panel the hook on the right downward to remove the service Service panel...
Page 162 From the previous page. OPERATING PROCEDURE PHOTOS/FIGURES (6) Remove 2 electrical parts box fixing screws (4 × 10), Photo 5 Electrical parts then detach the electrical parts box by pulling it upward. The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right.
Page 163 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the thermistor <Outdoor liquid pipe> (TH3) and Photo 9 thermistor <Compressor> (TH4), thermistor <HIC pipe> (TH2) (1) Remove the service panel. (See Photo 1) (2) Disconnect the connectors, TH3 (white) and TH4 (white), TH2 (black) on the multi controller circuit board in the electrical parts box.
Page 164 OPERATING PROCEDURE PHOTOS/FIGURES 9. Removing bypass valve coil (SV1, SV2) and bypass valve Photo 11 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) Switching (3) Remove the cover panel (front). (Refer to procedure 8(5)) Switching Linear expansion valve coil...
Page 165 OPERATING PROCEDURE PHOTOS/FIGURES Photo 13 13. Removing the compressor (MC) (1) Remove the service panel. (See Photo 1) Valve bed (2) Remove the top panel. (See Photo 1) Valve bed (3) Remove the cover panel (front). (Refer to procedure 8(5)) fixing screw Valve bed (4) Remove the cover panel (rear) (Refer to procedure 8(6))
Page 166 OPERATING PROCEDURE PHOTOS/FIGURES 15. Removing the reactor (DCL) Figure 3 (1) Remove the service panel. (See Photo 1) Reactors (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box (See Photo 5) (4) Remove 6 screws (4 x 10) for reactor to remove the reactors.
Page 167 OPERATION PROCEDURE PHOTOS/FIGURES Photo 18 17. Changing the fusible plug See the following descriptions. • Be careful not to expose the fusible plug to the braze torch flame or transfer heat to it. (See Photo 18) • The temperature of the fusible plug must not become 140°F (60°C) or more while working.
Page 168: Remote Controller
REMOTE CONTROLLER 12-1. REMOTE CONTROLLER FUNCTIONS <TAR-40MAA> Controller interface The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear.
Page 169 Display The main display can be displayed in two different modes: “Full” and “Basic”. The initial setting is “Full”. To switch to the “Basic” mode, change the setting on the Main display setting. (Refer to operation manual included with remote controller.) <Full mode>...
Page 170 Menu structure Main menu Press the button. MENU Move the cursor to the desired item with the buttons, and press the button. SELECT Operation Vane · Louver · Vent. (Lossnay) High power Comfort Manual vane angle 3D i-See sensor Timer menu Timer ON/OFF timer Auto-OFF timer...
Page 171 Continue from the previous page. Maintenance menu Error information Filter information Cleaning Auto descending panel Descending operation Descending adjustment Service menu Test run menu Test run Drain pump test run Maintenance information Model name input Serial No. input Dealer information input Initialize maintenance info.
Page 172 Main menu list Main Setting and display items Setting details menu Operation Vane · Louver · Vent. Use to set the vane angle. (Lossnay) • Select a desired vane setting. Use to turn ON/OFF the louver. • Select a desired setting from "ON" and "OFF." Use to set the amount of ventilation.
Page 173 Setting and display Main menu Setting details items Initial Display Main display Use to switch between "Full" and "Basic" modes for the Main display, and use setting setting to change the background colors of the display to black. Display de- Make the settings for the remote controller related items as necessary.
Page 174 <PAR-FL32MA> Controller interface Transmission area Transmission indicator Remote controller display Timer indicator *For explanation purposes, all of the items that appear in the display are shown. *All items are displayed when the Reset button is pressed. Operation areas ON/OFF button Temperature setting buttons Fan Speed button (Changes fan speed) Timer Off button...
Page 175 <PAR-SL101A-E> Controller interface Transmission area Remote controller display Set Temperature buttons OFF/ON button Mode button (Changes operation mode) Fan Speed button (Changes fan speed) Airflow button (Changes up/ i-see button* down airflow direction) Timer ON button Menu button Timer OFF button SET/SEND button Weekly timer ON/OFF button* CANCEL button...
Page 176 12-2. ERROR INFORMATION When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer. 1. Check code, error unit, refrigerant address, model name, and se- Error information rial number will appear. Error code The model name and serial number will appear only if the informa- Error unit...
Page 177 · Checking the error information Maintenance menu While no errors are occurring, page 2/2 of the error information can be Error information viewed by selecting "Error information" from the Maintenance menu. Filter information Errors cannot be reset from this screen. Cleaning Main menu: RETURN Cursor...
Page 178 12-3. SERVICE MENU Maintenance password is required 1. Select "Service" from the Main menu, and press the [SELECT] button. Main Main menu *At the main display, the menu button and select "Service" to make the Service maintenance setting. 2. When the Service menu is selected, a window will appear asking for the pass- Service menu word.
Page 179 12-4. TEST RUN 12-4-1. TAR-40MAA 1. Select "Service" from the Main menu, and press the [SELECT] button. Test run Input maintenance info. Settings Check Select "Test run" with the F1 or F2 button, and press the [SELECT] button. Others : RETURN SELECT MENU RETURN...
Page 180 12-4-2. PAR-FL32MA Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500 V Megger and check that it is equal to or greater than 1.0 MΩ. TEST RUN Turn on the main power to the unit. TEST RUN Press the button twice continuously.
Page 181 12-5. FUNCTION SETTING 12-5-1. TAR-40MAA Settings menu Function setting 1. Select "Service" from the Main menu, and press the [SELECT] button. Select "Setting" from the Service menu, and press the [SELECT] button. Service menu: MENU Select "Function setting", and press the [SELECT] button. SELECT MENU RETURN...
Page 182 12-5-2. PAR-FL32MA Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refriger- ant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller. [Flow of function selection procedure] Flow of function selection procedure The flow of the function selection procedure is shown below.
Page 183 12-5-3. PAR-SL101A-E 1. Going to the function select mode Press the button between of 5 seconds. (Start this operation from the status of remote controller display turned off.) [CHECK] is lit and "00" blinks. (Fig. 1) Press the button to set the "50". Direct the wireless remote controller toward the receiver of the indoor unit and press the button.
Page 184 12-6. ERROR HISTORY 1. Select "Service" from the Main menu, and press the [SELECT] button. Test run Input maintenance info. Settings Check Select "Check" with the F1 or F2 button, and press the Others : RETURN [SELECT] button. SELECT MENU RETURN HOLD 2.
Page 185 12-7. SELF-DIAGNOSIS 12-7-1. TAR-40MAA 1. Select "Service" from the Main menu, Diagnosis and press the [SELECT] button. Self check Remote controller check Select "Check" from the Service menu, and press the [SELECT] button. Service menu: MENU Cursor Select "Diagnosis" from the Check menu, and press the [SELECT] button.
Page 186 12-7-2. PAR-FL32MA When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> Refrigerant [Procedure] address display 1. Press the CHECK button twice. CHECK •...
Page 187 12-8. REMOTE CONTROLLER CHECK If operations cannot be completed with the remote controller, diagnose the remote controller with this function. 1. Select "Service" from the Main menu, and Diagnosis press the [SELECT] button. Self check Remote controller check Select "Check" from the Service menu, and press the [SELECT] button.
Page 188 12-9. SMOOTH MAINTENANCE Check menu 1. Select "Service" from the Main menu, and press the [SELECT] button. Error history Diagnosis Smooth maintenance Request code Select "Check" with the F1 or F2 button, and press the [SELECT] button. Service menu: MENU Cursor Select "Smooth maintenance"...
Page 189 ■ Refrigerant address Single refrigerant system Multi refrigerant system (group control) In the case of single refrigerant system, the refrigerant address Up to 16 refrigerant systems (16 outdoor units) can be con- is "00" and no operation is required. nected as a group by 1 remote controller. To check or set the Simultaneous twin, triple units belong to this category refrigerant addresses.
Page 190 MITSUBISHI ELECTRIC TRANE HVAC US LLC HEAD OFFICE: 1340 SATELLITE BOULEVARD, SUWANEE, GA 30024 USA ©Copyright 2023 MITSUBISHI ELECTRIC CORPORATION Issued: Sep. 2023 No. OCHT810A Published: Mar. 2023 No. OCHT810 Made in Japan Specifications are subject to change without notice.

This manual is also suitable for:

Ntxmsm48a182ba Ntxmsm60a182ba Ntxmsh36a142ba Ntxmsh42a152ba Ntxmsh48a182ba

Mitsubishi Electric NTXMSM36A142BA Technical & Service Manual

Table of Contents

Related Manuals for Mitsubishi Electric NTXMSM36A142BA

Summary of Contents for Mitsubishi Electric NTXMSM36A142BA

This manual is also suitable for:

Table of Contents