Haier AU55NFIAIA Service Manual
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Haier AU55NFIAIA Service Manual

Haier AU55NFIAIA Service Manual

Commercial air conditioner
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Commercial Air Conditioner

Service Manual

Model:
AU55NFIAIA
Features:
●Single AC inverter compressor unit
●Central control by one central controller
●Auto-restart
●Max. 8 indoor units can be connected
●Refrigerant: R22
●Super long piping length and large drop
between indoor unit and outdoor unit
●Individual operation for every indoor uint, energy saving
● Negative ion generator(optional)
MANUAL CODE:SYJS-019-05 rev. 0
Edition：2005-01-18

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  • Page 1: Service Manual

    Commercial Air Conditioner Service Manual Model: AU55NFIAIA Features: ●Single AC inverter compressor unit ●Central control by one central controller ●Auto-restart ●Max. 8 indoor units can be connected ●Refrigerant: R22 ●Super long piping length and large drop between indoor unit and outdoor unit ●Individual operation for every indoor uint, energy saving...

  • Page 2: Table Of Contents

    Commercial Air Conditioner Model: AU55NFIAIA CONTENTS Contents……..........…...………...……..1 1. Description of Products & Features…..………………...…….2 2. Specifications…………………………. ………………..……6 3. Safety precaution…………………………..…………………7 4. Net dimensions of indoor and outdoor unit……..…………...9 5. Installation instructions …………………..…. ………………..10 6. Parts and functions …………………..………..…… ..………..42 7. Remote controller functions………………………….………..43 8.

  • Page 3: Description Of Products & Features

    Commercial Air Conditioner Model: AU55NFIAIA 1. Description of product & features 1. Nomenclature 1：Product type symbol ( A stands for air conditioner) 2：Product model ( U stands for air conditioner outdoor unit) 34: Product specification ( 55 stands for nominal cooling capacity is 55000 BTU) 5：Applicable voltage ( N stands for 380-400 V/50 Hz)
  • Page 4 Commercial Air Conditioner Model: AU55NFIAIA Nominal Indoor units capacity Max. Refrig Appearance Model capacity(BTU/h) connected(BTU/h) indoor erant units cooling heating Min. Max. AU55N 55000 60000 28000 71000 8 FIAIA Note: 1. The designed capacity when installing(total capacity of indoor units connected to outdoor unit) <...
  • Page 5 Commercial Air Conditioner Model: AU55NFIAIA Types of indoor units capacity(BTU/h) type appearance model refrigerant cooling heating AB092FCAHA 9000 12000 AB142FCAHA 14000 17000 Four way cassette AB182FCAHA 18000 21000 Convertible AC182FCAHA 18000 21000 AE072FCAKA 7000 9000 AE242FCAKA 24000 28000 AE092FCAKA 9000...
  • Page 6 Commercial Air Conditioner Model: AU55NFIAIA 4. Character of Products 1) The length of horizontal refrigerant pipe can reach 70m,the total pipe length can reach 100m, the height difference between indoors unit and outdoor unit can reach 30m, the height difference between indoor units can reach 10m.

  • Page 7: Specifications

    Commercial Air Conditioner Model: AU55NFIAIA Specifications AU55NFIAIA Item model Function Cooling Heating 55000 60000 Nominal capacity BTU/h 6600 5000 Total power input 8000 Max. power input 8000 Dehumidifying capacity 10‐³×m³/h 3N 380-400V 50HZ Power source N,V,Hz Running current(max. running cooling:11.2/13.5 heating:9/13.5...

  • Page 8: Safety Precaution

    Commercial Air Conditioner Model: AU55NFIAIA 3 SAFETY PRECAUTIONS Please read these "Safety Precautions" first then accurately execute the installation work. Though the precautionary points indicated herein are divided under two headings, WARNING those points which are related to the strong possibility of an installation done in error...
  • Page 9 Commercial Air Conditioner Model: AU55NFIAIA SAFETY PRECAUTIONS WARNING When setting up or moving the location of the air conditioner, do not mix air etc. or anything other than the designated refrigerant (please see nameplate) within the refrigeration cycle. Rupture and injury caused by abnormal high pressure can result from such mixing.

  • Page 10: Net Dimensions Of Indoor And Outdoor Unit

    Commercial Air Conditioner Model: AU55NFIAIA 4.Net dimensions of outdoor unit Screw Hole (M10) Power wiring Terminal Back Air-flow Hole Installation Servicing Space(at Least) Unit:mm Back Air- flow Hole Installation Outlet Air-flow Hole Repairing Space Dimension Leave space Leave space Note : (1). Fix the parts with screws Leave space (2).Don't intake the strong wind directly...

  • Page 11: Installation Instructions

    Commercial Air Conditioner Model: AU55NFIAIA 5 INSTALLATION STRUCTION 5.1 Piping dimensions charts model liquid pipe gas pipe inch inch AU55 9.52 3/8" 19.05 3/4" AB09 6.35 1/4" 12.7 1/2" AB14 6.35 1/4" 12.7 1/2" AB18 9.52 3/8" 15.88 5/8" AC18 9.52...
  • Page 12 Commercial Air Conditioner Model: AU55NFIAIA FQG-B180 gas pipe heat preservation material liquid pipe heat preservation material Refrigerant pipes between manifold pipes Total refrigerating amount of indoor unit Gas side Liquid side group after the manifold pipe Less than 38220Btu/h 15.9 9.52...
  • Page 13 Commercial Air Conditioner Model: AU55NFIAIA In the file, the figure marked with "√" is permitted, and the figure marked with "×" is prohibited. You can confirm the position according to the actual condition. The refrigerant flow direction is always from the collective side to the divided side.
  • Page 14 Commercial Air Conditioner Model: AU55NFIAIA MP3、MP2 Electronic Expansion Valve Box figure: Connect with indoor liquid pipe Cover Bottom 80mm Fetch out the power line and the connecting line. Pay attention to fix firmly with wiring clamp. Connect with outdoor liquid pipe MP3、MP2 installation dimension:...
  • Page 15 Commercial Air Conditioner Model: AU55NFIAIA Inner Outer diameter Note: Cutoff the pipe of standard diameter 6.35mm 6.35mm accessories according indoor distribute pipe diameter, then connect it with MP3 For example: Outer diameter 6.35mm Inner diameter 9.52mm 9.52 Wax sealed Connect with pipe diameter 9.52mm on liquid side B、MP3(MP2) device installation position...
  • Page 16 Commercial Air Conditioner Model: AU55NFIAIA ADMISSIBLE COMBINATION EXAMPLES OF MULTIFLEX INVERTER REAL COOLING CAPACITY REAL HEATING CAPACITY TOTAL TOTAL Type of INDOOR UNITS CIRCUIT (OF EACH UNIT IN COMBINATION) (OF EACH UNIT IN COMBINATION) （×100W） COOLING HEATING CAPACITY CAPACITY 14.00 16.00...
  • Page 17 Commercial Air Conditioner Model: AU55NFIAIA ADMISSIBLE COMBINATION EXAMPLES OF MULTIFLEX INVERTER REAL COOLING CAPACITY REAL HEATING CAPACITY TOTAL TOTAL Type of INDOOR UNITS CIRCUIT (OF EACH UNIT IN COMBINATION) (OF EACH UNIT IN COMBINATION) （×100W） COOLING HEATING CAPACITY CAPACITY 14.00 16.00...
  • Page 18 Commercial Air Conditioner Model: AU55NFIAIA ADMISSIBLE COMBINATION EXAMPLES OF MULTIFLEX INVERTER REAL COOLING CAPACITY REAL HEATING CAPACITY TOTAL TOTAL Type of INDOOR UNITS CIRCUIT (OF EACH UNIT IN COMBINATION) (OF EACH UNIT IN COMBINATION) （×100W） COOLING HEATING CAPACITY CAPACITY 14.00 16.00...
  • Page 19 Commercial Air Conditioner Model: AU55NFIAIA ADMISSIBLE COMBINATION EXAMPLES OF MULTIFLEX INVERTER REAL COOLING CAPACITY REAL HEATING CAPACITY TOTAL TOTAL Type of INDOOR UNITS CIRCUIT (OF EACH UNIT IN COMBINATION) (OF EACH UNIT IN COMBINATION) （×100W） COOLING HEATING CAPACITY CAPACITY 14.00 16.00...
  • Page 20 Commercial Air Conditioner Model: AU55NFIAIA ADMISSIBLE COMBINATION EXAMPLES OF MULTIFLEX INVERTER REAL COOLING CAPACITY REAL HEATING CAPACITY TOTAL TOTAL Type of INDOOR UNITS CIRCUIT (OF EACH UNIT IN COMBINATION) (OF EACH UNIT IN COMBINATION) （×100W） COOLING HEATING CAPACITY CAPACITY 14.00 16.00...
  • Page 21 Commercial Air Conditioner Model: AU55NFIAIA ADMISSIBLE COMBINATION EXAMPLES OF MULTIFLEX INVERTER REAL COOLING CAPACITY REAL HEATING CAPACITY TOTAL TOTAL Type of INDOOR UNITS CIRCUIT (OF EACH UNIT IN COMBINATION) (OF EACH UNIT IN COMBINATION) （×100W） COOLING HEATING CAPACITY CAPACITY 14.00 16.00...
  • Page 22 Commercial Air Conditioner Model: AU55NFIAIA ADMISSIBLE COMBINATION EXAMPLES OF MULTIFLEX INVERTER REAL COOLING CAPACITY REAL HEATING CAPACITY TOTAL TOTAL Type of INDOOR UNITS CIRCUIT (OF EACH UNIT IN COMBINATION) (OF EACH UNIT IN COMBINATION) （×100W） COOLING HEATING CAPACITY CAPACITY 14.00 16.00...
  • Page 23 Commercial Air Conditioner Model: AU55NFIAIA ADMISSIBLE COMBINATION EXAMPLES OF MULTIFLEX INVERTER REAL COOLING CAPACITY REAL HEATING CAPACITY TOTAL TOTAL Type of INDOOR UNITS CIRCUIT (OF EACH UNIT IN COMBINATION) (OF EACH UNIT IN COMBINATION) （×100W） COOLING HEATING CAPACITY CAPACITY 14.00 16.00...
  • Page 24 Commercial Air Conditioner Model: AU55NFIAIA ADMISSIBLE COMBINATION EXAMPLES OF MULTIFLEX INVERTER REAL COOLING CAPACITY REAL HEATING CAPACITY TOTAL TOTAL Type of INDOOR UNITS CIRCUIT (OF EACH UNIT IN COMBINATION) (OF EACH UNIT IN COMBINATION) （×100W） COOLING HEATING CAPACITY CAPACITY 14.00 16.00...
  • Page 25 Commercial Air Conditioner Model: AU55NFIAIA ADMISSIBLE COMBINATION EXAMPLES OF MULTIFLEX INVERTER REAL COOLING CAPACITY REAL HEATING CAPACITY TOTAL TOTAL Type of INDOOR UNITS CIRCUIT (OF EACH UNIT IN COMBINATION) (OF EACH UNIT IN COMBINATION) （×100W） COOLING HEATING CAPACITY CAPACITY 14.00 16.00...
  • Page 26 Commercial Air Conditioner Model: AU55NFIAIA ADMISSIBLE COMBINATION EXAMPLES OF MULTIFLEX INVERTER REAL COOLING CAPACITY REAL HEATING CAPACITY TOTAL TOTAL Type of INDOOR UNITS CIRCUIT (OF EACH UNIT IN COMBINATION) (OF EACH UNIT IN COMBINATION) （×100W） COOLING HEATING CAPACITY CAPACITY 14.00 16.00...
  • Page 27 Commercial Air Conditioner Model: AU55NFIAIA ADMISSIBLE COMBINATION EXAMPLES OF MULTIFLEX INVERTER REAL COOLING CAPACITY REAL HEATING CAPACITY TOTAL TOTAL Type of INDOOR UNITS CIRCUIT (OF EACH UNIT IN COMBINATION) (OF EACH UNIT IN COMBINATION) （×100W） COOLING HEATING CAPACITY CAPACITY 14.00 16.00...
  • Page 28 Commercial Air Conditioner Model: AU55NFIAIA 5.3 Piping length and drop between units Haier 1) When connected with 8 units,indoor units refer to <admissible combination examples> 2) Total length=l1+l2*2+l3*4+l4*4+l5*4<=100m 3) Max. piping length =(l1+l2+l3+l5)<=70m 4) Max. piping length between the indoor unit and the first branch pipe<=30m 5) Max.
  • Page 29 AE07 NOTE: 1.When AU55NFIAIA unit is connected with 8 indoor units, pay attention that the total capacity of indoor units must not exceed 130% of outdoor cooling capacity. 2.Wall-mounted type can not be connected with 8 units by the outdoor unit. But you can refer to the above combination example.
  • Page 30 Commercial Air Conditioner Model: AU55NFIAIA 5.4 Combination examples A. 6 by one AS09 (or other 9000BTU units) AS09 (or other 9000BTU units) Haier AS09 (or other 9000BTU units) AU55NFIAIA AS09 (or other 9000BTU units) AS09 (or other 9000BTU units) Expansion valve AS09 (or other 9000BTU units) B.
  • Page 31 Commercial Air Conditioner Model: AU55NFIAIA C. 4 by one AP18(or other 18000BTU,14000BTU units) Haier AB09(or other 9000BTU,12000BTU units) AU55NFIAIA AS09(or other 9000BTU,12000BTU units) AC18(or other 18000BTU,14000BTU units) D. 3 by one 18 Ceiling concealed type Outdoor unit 09 Ceiling concealed type...

  • Page 32: The Order Of Installation Work

    Commercial Air Conditioner Model: AU55NFIAIA 5.6 The Order of Installation Work Item Work Main points Before installation Work division -to ascertain the person responsible for installation of pipes and wiring Make installation -to ascertain the pipe installation dimension and position of electronic...
  • Page 33 Commercial Air Conditioner Model: AU55NFIAIA work is not met with the requirements, overturn of the unit will occur resulting in accidents. l The wiring work shall be done by a qualified person and referred to the “ technical standard of electric equipment” , “ indoor wiring regulation” and what the manual specified.
  • Page 34 Commercial Air Conditioner Model: AU55NFIAIA 5.8 Special Work and Main Points in Installation Warning During installation, if refrigerant l After finishing installation, confirm leakage occurs, take ventilation the refrigerant gas does not leak. measurement immediately. l If the refrigerant gas leaks in the...
  • Page 35 Commercial Air Conditioner Model: AU55NFIAIA (4) Pipe connection of the outdoor unit Referring to the installation diagram in page 4, connect the indoor unit, outdoor unit, branch pipe and electronic expansion valve together by using the pipe connection method and welding method.
  • Page 36 Commercial Air Conditioner Model: AU55NFIAIA 5.9 Test of leakage after wiring work is finished After connection of the refrigerant pipes, carry out leakage test. In this test, pressurize to the pipes as shown in the below figure by using nitrogen tank.

  • Page 37: Charging Of Refrigerant

    Commercial Air Conditioner Model: AU55NFIAIA c. Vacuumize 2~3 hours according to the length of the pipe. When vacuuming, confirm the gas side and liquid side of the 2-way valve and 3-way valve shall be in full close state. d. When it is not lower than 200Pa after 2 hours or more vacuuming, vacuums for another 1 hour.
  • Page 38 Commercial Air Conditioner Model: AU55NFIAIA 5.11 Refrigerant MRV central air conditioner uses refrigerant “ R22” . This refrigerant itself is innocuous, non-combustible safety refrigerant. But then, when arranging the air conditioner equipment, it is necessary to take some steps to take precautions against in case of the indoors refrigerant leakage. Such as, the room size shall be taken into account to avoid making the concentration of the refrigerant not exceed the concentration limit and other relevant steps.
  • Page 39 Commercial Air Conditioner Model: AU55NFIAIA 5.12 Electric wiring Note: l The air conditioner must use special circuit (over 13A), and wiring by the qualified electrician according to the wiring rules specified in national standard. l The grounding wire and the neutral wire shall be strictly separated. Connect the neutral wire with grounding wire is incorrect.
  • Page 40 Commercial Air Conditioner Model: AU55NFIAIA Wiring method 1. Wiring method of orbicular terminals For the connection wire with orbicular terminals, its wiring method is as shown in the right figure: remove the connecting screw, put the screw through the ring on the end of the wire, then connect to the terminal block and fasten screw.
  • Page 41 Commercial Air Conditioner Model: AU55NFIAIA 2. Do not connect the power line with different dimensions to the same grounding wire end. Improper contact will affect protection. 3. Keep a proper distance between the communication wire and the power line. Otherwise, abnormal communication will occur because of disturbance.
  • Page 42 Commercial Air Conditioner Model: AU55NFIAIA 5.14 Checks after the installation After installation, please fill in the following form for easy daily maintenance: Factory No. of unit Site setting No. System belonged Model of indoor unit Check for installation and test run Please operate the air conditioner according to the operation manual.

  • Page 43: Parts And Functions

    Commercial Air Conditioner Model: AU55NFIAIA 6 PARTS AND FUNCTIONS 6 PARTS AND FUNCTIONS Outdoor unit Air inlet Air outlet Compressor (Inside of unit) - 42 -...

  • Page 44: Remote Controller Functions

    Commercial Air Conditioner Model: AU55NFIAIA 7 REMOTE CONTROLLER FUNCTIONS 7.1 Controllers 7.1.1 Wireless remote controller Signal Transmitter Mode Sending signals to the indoor Operation option display unit receiver Airflow volume Signal icon AUTO Airflow volume display Flashing while the signal is...

  • Page 45: Remote Controller

    Commercial Air Conditioner Model: AU55NFIAIA 7.1.3 Remote controller (new type) Remote controller 13.HEALTH DISPLAY 1.POWER ON/OFF used to show health state used for unit start and stop Buttons and display of the remote controller 14.TIMER DISPLAY 2.TEMPERATURE used to select your display the timer state: desired temp.
  • Page 46 Commercial Air Conditioner Model: AU55NFIAIA 7.1.3 Wired remote controller (old type) Heating operation indication Dehumidifying operation indication Cooling operation indication Fan only operation indication Automatic operation Operation indicator Clock display Power ON/OFF key Used to turn on /off the machine.

  • Page 47: Fan Speed

    Commercial Air Conditioner Model: AU55NFIAIA 7.1.4 Wired remote controller (new type) MODE CLOCK Used to select AUTO Used to set correct time. RUN, COOL, DRY, HEAT and FAN operation. TIMER Dial switch and Sensor Used to select FAN SPEED TIMER ON, TIMER OFF, TIMER ON/OFF.

  • Page 48: Timer Off

    Commercial Air Conditioner Model: AU55NFIAIA HEAT FAN OPERATION COOL SLEEP AUTO MODE SWING AUTO TEMP CLOCK TIMER SLEEP ROOM FILTER RESET RESET ON/OFF FAN SPEED OPERATING LAMP TIMER ON Remote control TIMER OFF TEMP. CLOCK Clock set When unit is started for the first time, clock should be adjusted as follows: Press CLOCK button, "AM"or "PM"...
  • Page 49 Commercial Air Conditioner Model: AU55NFIAIA Installation of receive display Because of the temperature sensitive device, do not install the receive display at straight sunlight place, either in front of air outlet grill, for it is effected greatly from cool air and heat air, the receive display is at least 20mm distance to the air outlet grill.
  • Page 50 Commercial Air Conditioner Model: AU55NFIAIA Installation of the wired remote controlller a. Remove upper part of wire PCB is mounted on lower part of wire controller, be careful not to damage Remove upper part of wire controller Upper part of wire...

  • Page 51: Refrigerant Diagram

    Commercial Air Conditioner Model: AU55NFIAIA 8. Refrigerant diagram - 50 -...

  • Page 52: Electrical Control Functions

    Commercial Air Conditioner Model: AU55NFIAIA 9 ELECTRICAL CONTROL FUNCTIONS 9.1 Function of special remote controller (Address setting) 1. Read function symbol Press “read” button , “1” flashes 1 time 2. Signal emitting symbol when “2” flashes ,it shows that remote controller is giving signal to indoor unit.
  • Page 53 Commercial Air Conditioner Model: AU55NFIAIA Function table for address setting controller After dehumification sign, emission sign, 8 sign, OFF sign, up arrow, down arrow display for 3 minutes, the controller will only display up arrow and down arrow power on...
  • Page 54 Commercial Air Conditioner Model: AU55NFIAIA Press "No. 6" button, 6 will flash, then press "SET" button at indoor unit. When a sound "du" of set No. 6 indoor unit is heard, unit 6 is set, then press "READ" to confirm if the unit number is right.
  • Page 55 (For new-developed indoor unit,number setting method refers to the indoor unit user's manual .The detailed operation procedure is as follows: (The special remote controller for setting unit number shall be carried by Haier air conditioner installation technicians.) - 54 -...
  • Page 56 Commercial Air Conditioner Model: AU55NFIAIA Setting in site Installation procedure The whole machine has been completely installed and is initially energized. Set with the special remote controller within 1 m from the infrared ray receiver on the indoor unit in the following way: press numeric keys on the remote controller according to the desired unit number, the remote controller LCD displays the corresponding number, then press the "UNIT SET"...
  • Page 57 Commercial Air Conditioner Model: AU55NFIAIA 9.2 Flow Chart for Operation (1) Unit number setting Start Power on Initialize electronic expansion valve Initialize louver position Read EEPROM contents, initialize program, if resume after power down indicators Having flash, waiting for the...
  • Page 58 Commercial Air Conditioner Model: AU55NFIAIA (2) Turn on/off unit Control function treat module Power indicator turn off, operation indicator turn On/off Trouble indication Trouble signal Mode determinatio Buzzer sound twice, Abnormal refuse receive operation n signal Choose mode Fan motor turn off,...
  • Page 59 Commercial Air Conditioner Model: AU55NFIAIA (3) Cooling operation Cooling operation Swing flap in the Swing cooling standard position Swing action Adjust fan speed according to temperature set and in Automatic air temperature fan speed Operate speed set Electronic expansion valve:...
  • Page 60 Commercial Air Conditioner Model: AU55NFIAIA (4) Dehumidifying operation Dehumidifying operation Swing flap in the cooling Swing standard position Swing action Adjust fan speed according to temperature set and in If enter cooling air temperature operation Determine dehumidify according temperature Electronic expansion valves...
  • Page 61 Commercial Air Conditioner Model: AU55NFIAIA (5) Heating operation Heating operation Swing flap in set fan speed Swing position Swing action side: wind off, Defrosting expansion valve steady Off side: Electronic expansion valve totally open Rated operation According temperature Fan motor operate in rated...
  • Page 62 Commercial Air Conditioner Model: AU55NFIAIA 9.3 Defrost operation Flow Chart 1. The compressor operates heating over 25 minutes, after meeting the defrosting condition, it is permitted to enter defrosting. Defrosting process is unit-stop defrosting mode. Determining condition of defrosting is as follows:...
  • Page 63 Commercial Air Conditioner Model: AU55NFIAIA 2. Compressor control The compressor will start at 10Hz and running between 30Hz to 120Hz. In operation the compressor running frequency is determined by three elements : the number of indoor units in operation , the temperature difference of each indoor units between setting temperature and room temperature , the size of each indoor unit.
  • Page 64 Commercial Air Conditioner Model: AU55NFIAIA We have changed the program of PCB. We call it as shut-off single fan motor control. In low temperature cooling mode, we can realize low pressure of compressor in a high range by start/stop fan motor, but the compressor pressure will change greatly in the two states of start/stop fan motor, so we design the shut-off single fan motor function to reduce the pressure difference.

  • Page 65: Diagnostic Information(Trouble Shooting)

    10 DIAGNOSTIC INFORMATION (TROUBLE SHOOTING) 10.1 Fault Codes In order to make repair and maintenance convenient, we set “Automatic troubleshooting” function in indoor unit and centralized controller. If any abnormal phenomenon occurs in operation, you can determine the trouble part and condition from the display on the LED of outdoor PCB, or the trouble code on the wired controller.
  • Page 66 Commercial Air Conditioner Model: AU55NFIAIA Malfunction code: LED display on If sent to Malfunction description Code the testing indoor Remarks board unit? Normal Normal Defrosting temperature E.4. Resumable sensor abnormal Ambient temperature sensor E.1. Resumable abnormal Suction temperature sensor E.3.
  • Page 67 Commercial Air Conditioner Model: AU55NFIAIA Testing board Press button “mode”, the display will change over in the following sequence: State Display Frequency Fxx.xx Current output A xx.x Stop Defr. Cool Heat Voltage on DC side U xxx Ambient temp 1 xx...

  • Page 68: Troubleshooting

    Commercial Air Conditioner Model: AU55NFIAIA 10.3 Troubleshooting (1) Indoor unit trouble indication: timer indicator flashes (once, twice, 3 times, 7 times) Abnormal reasons: Heat sensitive resister is short circuit or open circuit The treatment to sensor output part in PC board is improper, such as poor contact of package part, the electrolytic capacitor for filtering is failed, etc.
  • Page 69 Commercial Air Conditioner Model: AU55NFIAIA Treatment: use the DC voltage grade of multimeter to test the plastic sealed motor to find if there is any feedback signal, determine if the plastic sealed motor is abnormal. If normal, change the indoor unit PC board.

  • Page 70: Electrical Data

    Commercial Air Conditioner Model: AU55NFIAIA Refrigerant leaks Discharging air temperature heat sensitive resistor is improper Electronic expansion valve or 2-way valve is closed Treatment: check if there is leakage part, test system pressure in rated operation state to determine if there is leakage? Check the state of electronic expansion valve and 2-way valve.
  • Page 71 Commercial Air Conditioner Model: AU55NFIAIA AU55NFIAIA ELECTRICAL WIRING DIAGRAM 4 -W A Y S V 2 S V 1 H E A T W -P F M 3 F M 4 O X -P 0010574131 C N 2 10 C N 2 09...
  • Page 72 Commercial Air Conditioner Model: AU55NFIAIA Ports Ports name Wiring method R, S, T Power supply ports To power of 3 PH, 380V, 50Hz U, V, W Compressor ports To motor (pay attention to phase sequence) Grounded port Grounding (less than 10Ω;more thanφ1.6mm)
  • Page 73 Commercial Air Conditioner Model: AU55NFIAIA Below we will comment for the functions of some ports and some changes of PCB 0010451971 and 0010451531: 1. Control Board 0010451971 Herein, the control board we are concerned is the board without CPU. Functions for every port are as follows: CN301: port for power supply, connected with CN202 of the power board.
  • Page 74 Commercial Air Conditioner Model: AU55NFIAIA hard to be installed, we designed the Control board 3. the current edition. Contro l boa rd 3: 2. Pow er board 0010451531 There are two types of power board, and they have the same dimensions, but have the different voltage testing parts.
  • Page 75 Commercial Air Conditioner Model: AU55NFIAIA - 74 -...
  • Page 76 Commercial Air Conditioner Model: AU55NFIAIA 4.1.2 Indoor unit 1) Model: AS062FMAHA AS072FMAHA AS092FMAHA AS122FMAHA Butt joint part of negative ion Transformer Grounding Negative ion wire generator Fuse motor Manual emergency switch Liquid pipe temperature sensor Indoor temperature sensor Gas pipe...
  • Page 77 Commercial Air Conditioner Model: AU55NFIAIA 2) Model: AS182FTAHA 3) Model: AP182FAAHA Ambient Vapor pipe temperature sensor temperature sensor Liquid pipe Control board temperature sensor Terminal block Connect with outdoor unit Electronic expansion valve Color instruction: B : Black R: Red...
  • Page 78 Commercial Air Conditioner Model: AU55NFIAIA 4) Model: AB092FCAHA AB142FCAHA AB182FCAHA ELECTRO-EXPANSION VALVE INDOOR PCB TEST CN18 CN16 ROOM TEMP.SENSOR CN17 GAS PIPING TEMP.SENSOR serial LIQUID PIPING TEMP.SENSOR FLOAT SWITCH CN15 CN10 CN14 CN13 CN12 CN11 SIGNAL RECEIVER BOARD CAPACITOR PUMP...
  • Page 79 Commercial Air Conditioner Model: AU55NFIAIA Electronic expansion valve wiring diagram MP3 wiring diagram: FUSE T3.15A/250VAC CN1 live wire 1 CN2 neutral wire 1 CN3 COM1 control board electronic live wire 2 CN4 expansion CN7 live wire 3 neutral wire 2...
  • Page 80 Commercial Air Conditioner Model: AU55NFIAIA Indoor unit wiring diagram 0010573324 NOTE:The dashed "－－－ "in indoor controll board is electronic expansion valve PCB inner wiring. for built-in EEV type About control board outer connector: In the diagram,gas pipe temp. sensor,liquid pipe temp.

  • Page 81: Exploded Views And Parts Lists

    Commercial Air Conditioner Model: AU55NFIAIA 12 EXPLODED VIEWS & PART LISTS 12.1 Model: AU55NFIAIA - 80 -...
  • Page 82 Commercial Air Conditioning Model: AU55NFIAIA the proportion of No. in Spare parts Spare parts description in Failure the spare-part exploded view number English Qty. Model rate stock Remark 1 001A0100122 AU55NFIAIA 0.00% 0.000% × Front guard assy 2 001A1301707 AU55NFIAIA 0.00%...
  • Page 83 Commercial Air Conditioner Model: AU55NFIAIA - 82 -...
  • Page 84 Commercial Air Conditioning Model: AU55NFIAIA No. in the proportion of explod Spare parts the spare-part ed view number Spare parts description in English Qty. Model Failure rate stock Remark 0010152259 Electrical box assembly AU55NFIAIA 0.02% 0.024% 0010450676 3 phase rectifier AU55NFIAIA 0.01%...

  • Page 85: Perdormance Curves

    Commercial Air Conditioner Model: AU55NFIAIA Characteristics of refrigerating and heating capacity AU55- 1) Calculation method Calculation method of refrigerating capacity-Refrigerating capacity to be known = Refrigerating capacity x (1) x (2) x (3) x (4) x (5) W (3) Capacity modification value...

  • Page 86: Noise Level Charts

    Commercial Air Conditioner Model: AU55NFIAIA Noise level curve for model AU55NFIAIA 1. The data are based on the following conditions： (1) The data are measured in half- elimination laboratory； (2) The running frequency of outdoor unit is 90Hz. (3) Working mode: cooling Indoor temperature: 27℃DB,19℃WB;...

  • Page 87: Noise Level Curve

    Commercial Air Conditioner Model: AU55NFIAIA 2. Noise level curve 1700 3400 6800 NC-70 NC-60 NC-50 NC-40 NC-30 NC-20 Approximate threshold hearing for continuous noise. 1000 2000 4000 8000 Octave band frequency(Hz) Noise level curve for model AU55NFIAIA - 86 -...
  • Page 88 Commercial Air Conditioner Model: AU55NFIAIA Sincere Forever Haier Group Haier Industrial Park, No.1, Haier Road 266101, Qingdao, China http://www.haier.com...

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