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Haier AU96NFTAHA Service Manual

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SYJS-001
Commercial Air Conditioning
Haier and Higher
Haier Commercial MRV Service Manual
Haier Group
2002
http://splitoff.ru/tehn-doc.html
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  Summary of Contents for Haier AU96NFTAHA

  • Page 1 SYJS-001 Commercial Air Conditioning Haier and Higher Haier Commercial MRV Service Manual Haier Group 2002 http://splitoff.ru/tehn-doc.html...
  • Page 2: Table Of Contents

    --------------------------------------------------------------------------------------- 1. Wiring diagram of indoor unit-------------------------------------------------------------------------- 2. Wiring diagram of outdoor unit------------------------------------------------------------------------- a. Connection method of wiring--------------------------------------------------------------------------- b. Wiring diagram of AU96NFTAHA outdoor unit---------------------------------------------------- c. Wiring diagram of AU55NFUAHA outdoor unit---------------------------------------------------- Refrigerant pipe -------------------------------------------------------------------------------------- 1. System diagram of refrigerant pipe--------------------------------------------------------------------- 2.
  • Page 3 8. Other supporting controls--------------------------------------------------------------------------- Essentials of trial run ------------------------------------------------------------------------ 1. Sequence of trial run--------------------------------------------------------------------------------- 2. Confirmation before trial run----------------------------------------------------------------------- 3. Confirmation of trial run---------------------------------------------------------------------------- Fault diagnosing ------------------------------------------------------------------------------- 1. Inspection method------------------------------------------------------------------------------------ 2. Sequence of judgement------------------------------------------------------------------------------ 3. Judging method for fault of display of remote controller--------------------------------------- 4.
  • Page 4: Characteristics Of Mrv

    Characteristics of MRV Outdoor unit Y-type manifold pipe Comb-shape manifold pipe Indoor unit group The branch mode of refrigerantpipe consists of free combinationof Y-type manifold pipe andcomb-shape manifold pipe.Branc Indoor unit group can connect1 6 u n i t s , r e a l i z i n g t h e The max.
  • Page 5: General

    General 1. Formation of branch mode for basic manifold pipe (example) Outdoor unit Comb-shape manifold pipe Indoor unit group Y-type manifold pipe Comb-shape Y-type manifold pipe manifold pipe : http://splitoff.ru/tehn-doc.html...
  • Page 6: Formation Of The Unit

    Appearance Model of indoor Cooling Heating Max. unit AU55NFUAHA 55,000 60,000 7.56 (6HP) AU96NFTAHA 96,000 107,500 13.5 (10HP) Manifold pipe Appearance Name Model Total capability of indoor unit is less than Y-type manifold pipe FQG-B180 6.4 HP Total capability of indoor unit is 6.4~13.2...
  • Page 7 Indoor unit Capacity (BTU/h) Model Appearance Model Cooling Heating 9000 11000 AB092FEAIA 1.25 12000 14000 AB122FEAIA 14000 16000 AB142FEAIA Cassette type AB162FEAIA 16000 17000 unit with AB182FEAIA 18000 21000 airflow in AB242FEAIA 24000 28000 four directions AB282FEAIA 28000 32000 32000 34000 AB322FEAIA 36000...
  • Page 8: Selection Of The Unit

    7. Confirmation of selecting indoor unit group and unit group combination of outdoor unit and indoor unit group Min. Max. The power supply group should be selected when supplying power to the outdoor unit. AU55NFUAHA 7.56 Finish AU96NFTAHA 13.5 : http://splitoff.ru/tehn-doc.html...
  • Page 9: Installation Of The Unit

    Installation of the unit 1. Convertible type unit AC092FEAHA, AC122FEAHA, AC162FEAHA According to the position as shownin the left diagram, select a leading-out direction for pipeline and circuit.There are drain holes o backward rightward left drain hole right drain hole leftward 990mm Installing the wall-hanging support...
  • Page 10 Installing method of convertible type unit AC182FEAHA, AC242FEAHA (1). Arrange the wall outlet hole and install the support fixinghole according to the following diagram; drill*10 x 60 holeon the pos 1244mm install support fixing hole 326mm ceiling wall (2). Fix the support selectable position for wall outlet hole As shown in the diagram, fix the support with expansion bolt.
  • Page 11: Cassette Type Unit With Airflow In Four Directions

    2. Cassette type unit with airflow in four directions AB092FEAIA, AB122FEAIA, AB142FEAIA, AB162FEAIA I. Selecting installation position (1) Select the space above the ceiling and capable of placing the unit. (2) Place it in the place where the drainpipe can be well arranged. (3) Select the place where the airflow inlet and outlet of the indoor unit can not be blocked.(4) Do not expose the unit to the place w gases (such as thinner, gasoline, etc.) are concentrated or retained.
  • Page 12 III. Installation of indoor unit For new ceiling (1) Temporarily installing the indoor unit group Attach the hanger bracket to the hoisting screw stem to hoist the unit. Be sure to use the nut and washer respectively both at the top end and bottom end of hoisting foot, so as to firmly fix the hanger bracket. (2) Install the ceiling.
  • Page 13 Cassette type unit with airflow in four directions AB182FEAIA, AB242FEAIA, AB282FEAIA 4-4M hole 2 x100=200 182.5 300 or below 860-890(opening of ceiling) (preformed hole) 680(hanging position ) connection of branch air pipe Connecting new air assembly min. 1500mm stand-by space min.
  • Page 14: Air Duct Type Unit Of High Static Pressure

    3. Duct type unit of high static pressure AD322FIAHA, AD362FIAHA, AD452FIAHA above 900 above 100 check opening above 300 air outlet (600x600) above 200 air inlet ceiling Requited installing space (unit: mm) Preparation before installation (1) Ubiety before hosting screw stem (unit: mm) 1270 below above...
  • Page 15 4. Installation of indoor unit group Hoisting screw stem Fix the indoor unit to the hoisting screw stem. M10 nut M10 washer If necessary, the unit may be hung to the crossbeam. If there is no hoisting screw stem, directly use the bolt. main M10 spring washer unit...
  • Page 16: Outdoor Unit

    4. Outdoor unit AU96NFTAHA 1100 Detailed plane of the hole for 1290 bottom pipe installation. motherboard board 1164 board 1100 : http://splitoff.ru/tehn-doc.html...
  • Page 17: Dimension Of Manifold Pipe

    5. Dimension of manifold pipe Y-type manifold pipe FQG-B180 <gas side> 15.9 12.7 19.0 15.9 19.0 19.0 15.9 heat preservation 22.2 material 12.7 15.9 12.7 12.7 <liquid side> heat preservation material 12.7 Dimension is the out diameter connecting to the tubing. FQG-B370 19.0 <gas side>...
  • Page 18 Comb-shape manifold pipe FQG-H3704 <gas side> 12.7 15.9 19.0 15.9 19.0 heat preservation 25.4 material 28.6 <liquid side> heat preservation material 12.7 15.9 19.0 FQG-H3708 <gas side> 12.7 15.9 19.0 19.0 25.4 heat preservation 28.6 material <liquid side> heat preservation material 12.7 15.9 19.0...
  • Page 19: Wiring Diagram

    Switch function Wiring diagram Rotary switch For setting unit code of indoor unit SW01 SW02 Dial switch (7P) For setting centralized control address SW03 Dial switch (3P) For TA temperature modification when heating 1. Wiring diagram of indoor unit Dial switch (1P) For emergency running SW04 Dial switch (4P) For setting HP of indoor unit SW05...
  • Page 20: Wiring Diagram Of Outdoor Unit

    2. Wiring diagram of outdoor unit a. Wiring connection diagram Indoor and outdoor communication link. Two-core cable, no polarity. Shielded wire. Wire thickness: 1.5 mm , below 500 m. 3N, 380V Outdoor unit Earth point for indoor and outdoor Indoor power cord. communication link shielding layer.
  • Page 21: Wiring Diagram Of Au96Nftaha Outdoor Unit

    Wiring diagram of AU96NFTAHA outdoor unit pressure sensor pressure sensor high pressure(PD) low pressure(PS) resistor G-Tr capacitor EZ BZ EY BY EX BX diode diode resistor EW BW EV BV EU BU capacitor reactor line assembly D,C,current sensor reactor...
  • Page 22: Wiring Diagram Of Au55Nfuaha Outdoor Unit

    c. Wiring diagram of AU55NFUAHA outdoor unit pressure sensor pressure sensor resistor low pressure(Ps) G-Tr high pressure(Pd) capacitor diode EZ BZ EY BY EX BX diode resistor EW BW EV BV EU BU capacitor 1 2 3 4 reactor line 1 2 3 4 assembly C,current sensor...
  • Page 23: Refrigerant Pipe

    Pressure sensor check joint Gas liquid separator Refrigerant by-pass TCIA Filter Sensor Sensor Heat exchanger Filter Pressure sensor check joint Outdoor unit (AU96NFTAHA) TCIA Sensor Sensor Heat exchanger Filter TE sensor High pressure High pressure Filter Compressor sensor Pd switch...
  • Page 24: Max. Length And Difference Of Height Of Refrigerant Pipe

    2. Max. Length and difference of height of refrigerant pipe Outdoor unit Comb-shape manifold pipe First branch Indoor unit group The corresponding length of furthest refrigerant *125 The corresponding length of furthest refrigerant pipe after the first branch * 50m Indoor unit group Max.
  • Page 25: Selection Of Refrigerant Pipe

    AU55NFUAHA between first branches *28.6 *12.7 AU96NFTAHA Same as the dimension of refrigerant pipe of outdoor unit (Table 1) When the corresponding length of the gas pipe before the first branch exceeds 35 m, the length of the refrigerant pipe should be above grade 1.
  • Page 26 Selection of refrigerant pipe Unit used Outdoor unit AU96NFTAHA x 1 set AS182FEAHA x 2 sets 10 HP outdoor unit AS122FEAHA x 2 sets Indoor unit AS092FEAHA x 2 sets AS072FEAHA x 4 sets Total: 10 sets Manifold pipe end...
  • Page 27: Length Of Refrigerant Pipe And Injection Rate

    L2: Real total length of liquid pipe *9.5 *6.4 0.030 *9.5 L3: Real total length of liquid pipe *6.4 0.065 *12.7 0.115 Injection rate of refrigerant before delivery Name of outdoor unit AU55NFUAHA AU96NFTAHA Feeding amount 10 kg 18 kg : http://splitoff.ru/tehn-doc.html...
  • Page 28: Characteristics Of Cooling And Heating Capacity

    Characteristics of refrigerating and heating capacity 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 Capacity compensation value of outdoor air dry-bulb (1) Capacity compensation value of indoor under airflow variation rate of air wet-bulb temperature condition...
  • Page 29 3) Capacity modification when indoor unit and outdoor unit and heat exchanger frost when heating Heating capacity = Capacity of outdoor unit after modification x frosting capacity modification (Capacity of outdoor u (6) Frosting capacity modification value of outdoor heat exchanger Outdoor air wet-bulb temperature * 4) Calculation method of operation capacity of one set indoor unit standard operation capacity of indoor unit to be known...
  • Page 30 Air volume: Strong Standard length of refrigerant pipe -9 -4 1 Cooling capacity (kcal/h x 10 Heating capacity (kcal/h x 10 Indoor air suction temperature 20.0* AU96NFTAHA Heating When 2 sets 80indoor unit combine Indoor air suction temperature 19.0* Air volume: Strong Standard length of refrigerant pipe...
  • Page 31: Control

    Control 1. Control of indoor unit group Item Specification Remarks Running mode, (1) Automatic setting of remote control function When indoor unit range, fan speed Switch the setting of remote controller and display the range switching, whether is electrified there is swing according to the changing result of indoor unit model.
  • Page 32 Item Specification Remarks (1) Send running frequency command to outdoor unit according to the difference of Ta and Ts. Cool Heat Compressor OFF Ts: setting Capacity automatic temperature control Ta: room temperature Compressor OFF Note: The running frequency in the above diagram may change due to protection control of outdoor unit.
  • Page 33 Item Specification Remarks (1) Change "HIGH", "MED", "LOW" and "AU" AUTO fan speed according to the command given by remote controller or central controller. (2) When heat, when the required temperature is reached, it will enter into the state of "ultra-low airflow" or "stop". Duct type:Airflow is "Fix";prev (3) When the airflow is automatic, it can be controlled according to due to this...
  • Page 34 Item Specification Remarks When the indoor unit group that is in the state of stop or reaches certain When cool: temperature or conducts " fan only " receives the signal of recovery of recovery control refrigerant and oil from outdoor unit, the PMV of indoor unit group will of refrigerant and open some opening.
  • Page 35 Item Specification Remarks (1) When connected with telephone remote controller or remote start/stop device, the receiving of remote HA signal input, co- For remote ntrol start/stop can be realized; start/stop HA control (2) Output running/stop state through HA output terminal; control (3) For the output specification of HA, carry out the specification of JEMA.
  • Page 36: Control Of Outdoor Unit

    Demand running PC board Maghetic contactor Snowfall preventing * for compressor fan control PC board * 7 segment nixie *only one of them can tube be selected 4-way valve Night low noise Solenoid valve running PC B Electronic expanding valve Full running/stop Outdoor fan PC board...
  • Page 37 a. Control of outdoor unit Item Specification (1) Conduct comprehensive calculation for running demand from indoor unit group to determine the running capacity; Capacity control (2) Make running capacity change according to the demand of excess or insufficient capacity given by indoor unit group; (3) Make running capacity change according to pressure, temperature.
  • Page 38: Matters Needing Confirmation Before Trial Run

    Matters needing confirmation before trial run 1. Automatic address When the air conditioner is installed for the first time, the address will be automatically set. The time for automatic setting address usually takes 3~5 minutes after switching on the power (but sometimes it will take about 20 minutes).
  • Page 39: Confirming Function Of Connection Of Refrigerator Pipe And Signal Line For Control

    3.Confirming function of connection of refrigerator pipe and signal line for control This air conditioner system has the function of checking and confirming the wrong connection of refrigerant pipe and signal line for control between indoor unit group and outdoor unit (bridging of outdoor unit). Before carrying out checking and confirming function, be sure to confirm the following matters: 1.When bridging the central controller with outdoor unit, it can not check and conform;...
  • Page 40: Function Of Outdoor Unit For Commanding On/Off Of Indoor Unit Group

    4. Function of outdoor unit for commanding ON/OFF of indoor unit group Function Outline Setting troubleshooting method [setting] All the indoor unit groups connected are Use SW01 "0", SW02 "11", press SW04 for simultaneously set to the trial run mode. over 2 seconds;...
  • Page 41 a. Cooling trial run function of outdoor unit Function of setting all the indoor unit groups connected to the cooling trial run mode, with outdoor unit as unit. (Running sequence) Switch on the power Set SW01 on the I/F PCB of outdoor unit to "0", SW02 to "11"...
  • Page 42 b. Heating running function of outdoor unit Function of setting all the indoor unit groups connected to the heat trial run mode, with outdoor unit as unit. (Running sequence) Switch on the power Set SW01 on the I/F PCB of outdoor unit to "0", SW02 to "12"...
  • Page 43 c. Simultaneously running, stopping, individual running and stopping function while operating outdoor unit This is a function of operating connected indoor unit group by outdoor unit, with outdoor unit as unit. All simultaneously running/stopping: SW01 "0", SW02 "14" –all indoor unit groups connected run. Individually running/stopping: SW01 "15", SW02 –only limited to set indoor unit group run.
  • Page 44: Function Of Eliminating Abnormality

    5. Function of eliminating abnormality 1. Using "abnormality eliminating" function of remote controller or central controller The remote controller of some indoor unit group can eliminate the abnormal state of all stopping of outdoor unit (whole system) connected to make them run again ( begin again after abnormality is checked out).
  • Page 45: Judging Function Of Remote Controller

    6. Judging function of remote controller (1) Confirm the function of remote controller through outdoor unit (Judgment sequence) Switching on the power For outdoor unit, the switch on the I/F PCB plate will Operation be set as follows: SW01: "0", SW02: "15". Press SW04 on the same PCB for over 2 seconds.
  • Page 46: Confirming Function Of Outdoor Unit

    7. Confirming function of outdoor unit (1) Confirm the function of connected outdoor unit through remote controller (Judgment sequence) Switching on the power Opening the cover of remote controller Operation Setting is "fan only", conduct set time shortening func- tion. (For setting of time shortening function, use short circuit pin: D1) * For connected by-pass of outdoor unit, the two-way...
  • Page 47: Other Supporting Controls

    8. Other supporting controls (1) Forcing full opening function of indoor PMV This function can make the PMV of indoor unit group force fully opening for 2 minutes through operation the switch on the I/F PCB of outdoor unit. [Operating method] SW01 setting is "0", SW02 setting is "8";...
  • Page 48: Essentials Of Trial Run

    Essentials of trial run 1. Sequence of trial run With the installation engineering as the center, Please conduct trial run as per the confirm the basic items. The confirmation result following sequence: must be recorded in Confirmation Sheet 1, 2. Confirmation of trial run Strictly carrying out as per the sequence flow of trial run.
  • Page 49: Confirmation Before Trial Run

    2. Confirmation before trial run Before trial run, please confirm whether the installation engineering has abnormality and record it on the "Confirmation Sheet 1". Confirmation Sheet 1 Outdoor unit Whether the capacity of the electrical leakage protector is proper A; Indoor unit group Indoor unit group Whether the wire diameter of power cord is correct Outdoor unit...
  • Page 50: Confirmation Of Trial Run

    3. Confirmation of trial run After "confirmation before trial run", trial run as per the following sequence. (Switch on the power of outdoor unit to electrify the electric heater of crankcase 12 hours before trial run). For confirmation of trial run, it should be conducted for indoor unit group one by one in principle. When all indoor unit group run simultaneously for confirmation, there is no way to conduct confirmation of wrong connection of refrigerant pipe and control wire.
  • Page 51 (3) Confirmation of cool running Start Set the running mode to "cool". Under unit Once the outdoor unit stops, it must be restarted after 2 minutes and 30 closing state, press running button for over 5 seconds. seconds to confirm displaying "L". Check indoor unit...
  • Page 52 (4) Confirmation of heat running Start Set the running mode to “heat”. Under unitclosing state, press running button for over 5seconds to confirm d Once the outdoor unit stops, it must berestarted after Check indoor Confirm the running state ofcompressor Whether there unit is hot air blowing out...
  • Page 53 (Note 1) Approximate standard of temperature difference of air inlet and air outlet (1) When setting in "cool" mode, after running at least 30 minutes, it is normal when the dry-bulb temperature difference of air inlet and air outlet is over 10*. (When running at max. frequency). (2) When setting in 'heat"...
  • Page 54: Fault Diagnosing

    Fault diagnosing 1.Inspection method Inspection code of LCD remote controller Standby display Remote controller Remote Capability overloadAbnormal phasedifferent mode controller Serial remote controller Signal loop Indoor unit I / F 1.Frequency conversion serial 1.Room temperature sensor signal loop, TRS circuit2.Outdoor heat exchanger sensor(TE) cir "04"...
  • Page 55: Sequence Of Judgement

    2. Sequence of judgement (1)Press "check" button on the remote controller to confirm inspection code. Whether the running lamp on the remote controlleris on Whether the LCD "standby" on the remote controller is on Whether the remote has display of inspectioncode Whether the indoor fan run Please refer to fault judging method of remote controller inspection display.
  • Page 56 Check the powercord betweenind Whether Whether Whether there is AC220V Whether there is AC14V there is AC14V voltage voltage between voltage between the 5 A fuse is between of remote indoor unit group indoor unit terminal normal controller terminal block block terminal Fuse is improper...
  • Page 57 I n d o o r P C B i s improperWire Whether Whether Whether Fan only there is 15V voltage there is 15V voltage other indoor mode, whether between B, C of remote between B, C of indoor unit begin to the fan runs controller unit terminal...
  • Page 58: Judging Method For Fault Of Display Of Remote Controller

    3. Judging method for fault of display of remote controller A.Simple remote controller (1) Check display operationFor fault display operation, pressing "check" button can confirm inspection code. Refer to the de ® GRUP UNIT CHECK STANDBY FAN ONLY NUMBER NUMBER LCD displays the reason of "standby"...
  • Page 59 (2) Reading method of inspection code Press the check button, the number (when controlling in group, it will be address in the group) of indoorunit group <7-segment display> Hexadecimalsystem Decimal system <check display> Unit Filter mark of filter group Inspection code Number of indoor unit group <Filter information>...
  • Page 60 B. Standard remote controller (with time-meter) (1) Check display operation Pressing check button can confirm inspection code. Refer to item 2 for reading method of inspection code: LCD displays the reason of "standby" Indoor unit group with cool mode being set due to prior to heat control When the capability of indoor unit group is overloaded Selection of indoor unit group whose running mode is opposite to the running mode (cold/heat) and switch setting content of outdoor unit...
  • Page 61 (2) Reading method of inspection code Press the check button, the number (when controlling in group, it will be address in the group) of indoor unitgroup with <7-segment display> Hexadecimalsystem Decimal system <Filter information> (For example) When the filter information of No. 1 and No. 15 unit controlled in group is sent out Filter Filter screen...
  • Page 62 C. Centrol controller (1) Check display operation Pressing check button can confirm inspection code. Refer to item 2 for reading method of inspection code: LCD displays the reason of "standby" Indoor unit group with cool mode being set due to prior to heat control When the capability of indoor unit group is overloaded Selection of indoor unit group whose running mode is opposite to the running mode (cold/heat) and switch setting content of outdoor unit...
  • Page 63 (2) Reading method of inspection code Press the check button, the number (centralized control address) of indoor unit group with inspection codewill be disp <7-segment display> Hexadecimalsystem Decimal system <Check> Number of unitgroup Unit group ( Centralized control address ) Inspection codefirst checked out Checkout Inspection codelast checked out...
  • Page 64 (3) Sequence of judgment [04] Serial communication circuit of I/F interface PCB and INV PCB, TRS temperature switch circuit. Check I/F PCB whether there is serial signal sending to Check outdoor I/F PCB the INV PCB Check I/F PCB whether there is continuous signal coming from the INV PCB Check the condition of power interferenceand extraneous noise Check outdoor INV PCB, TRS...
  • Page 65 [0C] Circuit of room temperature sensor (TA) Whether the connection of the connectors of Modify the connection CN04 is normal Whether the resistance value/temperature Replace TA sensor characteristic of TA are normal Check indoor PCB, if improper, replace it : http://splitoff.ru/tehn-doc.html...
  • Page 66 [11] Motor circuit (phase silicon control) Start after resetting, whether the indoor fan runs later on Whether the connection of the connectors is improper or broken Whether the Modify the connection,wiring connection of the connectors of CN07 is improper or broken Whether the pin 1-3 in CN18 has DC12-13V...
  • Page 67 [14] Overcurrent protection circuit of inverter Whether the Improve power supply circuit power voltage is normal Whether the Check and modify circuitwiring, chec connection of the connectors is normal Whether the Mg-SW acts (AC contactor) Whether the AC fuse is broken Replace the fuse Whether the Check the reason ofabnormal o...
  • Page 68 [17] Circuit of current sensor Whether the detection circuit of current sensor Check circuit wiring, modifying is normal Check outdoor PCB, ifimproper, replace it [18] Outdoor heat exchanger sensor (TE) loop Whether the Modify the connection of theconnectors connection of the connectors of CN05 is normal Whether the resistance value/temperature...
  • Page 69 [1d] Compressor system loop Whether the Improve power supply circuit supply voltage is normal Check and modify the circuitwiring such Whether the wiring connectors are normal Whether the compressor is normal Compressor is locked,replace it Whether there is liquid slugging Whether the Replace the electric heaterof crankcase electric heater (heating zone) of the...
  • Page 70 [21] High pressure switch system circuit (inverter) Whether the high pressure switch acts Whether the Please refer to the judging sequenceof frequency in frequency conversion IOL circuit is normal Whether the high pressure switch Check the part, if improper, replace it is normal Whether the Check the wiring, modifying...
  • Page 71 [21] High pressure switch system circuit (inverter) Whether the indoor fan is normal (heat) Whether the connection of the connectors, Modifying capacitor and fan motor are normal Whether indoor PMV is normal Whether connecting winding of the Modifying connectors is normal Whether there is the factor affecting indoor heat...
  • Page 72 [22] High pressure protection action (Pd sensor) Whether the Check the part, if improper,replace it characteristic of high pressure sensor is normal Whether the Fully open shutoff valve shutoff valve is fully open Whether the outdoor fan can normally run (cool) Whether the connection of the connectors, Modifying...
  • Page 73 Whether the indoor fan is normal (heat) Whether the connection of the connectors, Modifying capacitor and fan motor are normal Whether indoor PMV is normal Whether connecting winding of the Modifying connectors is normal Whether there is the factor affecting indoor heat exchange 1.
  • Page 74 [89] Capability of indoor unit connected overload Communication line is connected to theoutdoor unit due Whether the number of indoor unit connected is correct Whether the Modify the indoor unit having incorrectsetting HP setting of indoor unit is correct The capability of indoor unit connected is over 1.35 Outdoor PCB is improper replace it...
  • Page 75 [95] Indoor and outdoor communication circuit Whether the P, Q communication line has mismatching Modify the communication line line and broken line Whether the connection of the connectors of indoor Modify the wiring of the connectors PCB CN24 is normal Whether the connection of the connectors of outdoor I/F PCB CN11 is normal...
  • Page 76 [96] Contradiction checkout of indoor and outdoor address Whether the connection of communication line and Modify the wiring connection wiring of P, Q terminal connected is normal Whether the communication line is connected to Modify communication line many outdoor units Whether the number of indoor unit connected to the outdoor unit is normal...
  • Page 77 [97] Communication circuit of centralize control Whether the Modify communication line X, Y communication line are normal Whether the connection of the connectors Modify socket wiring of indoor PCB CN15 is normal Whether there is improper connection Check and modify power wiring of power wiring Whether the Whether there is power...
  • Page 78 [98] Address setting of centralized management Whether the Modify the wiring connection connection of wiring of the communication line X, Y is normal Whether only the central controller displays [98] Modify the connectionof communication Whether the running in group secondary unit (No.2~16 unit) running in group is connected to X, Y communication line Whether the...
  • Page 79 [99] Mismatching line of remote controller terminal whether the wiring of remote controller A, B, C terminal Modify wiring is correct Whether there Modify the connection of the is broken wire or improper contact of connectors the connectors Whether it runs in group Whether Set one unit groupto No.1 the indoor unit group running in group...
  • Page 80 [9A] Mismatching line and wrong connection of indoor unit group If the outdoor unit has been stooped for over 20minutes, recheck the mi Whether the outdoor unit has been stopped for over Recheck the 20 minutes before checking mismatching line, check mismatching line Wiring is correct whether "9A"...
  • Page 81 [A0] Exhaust temperature sensor (TD1) circuit Whether the Repair connecting wire of connectorwiring TD1 sensor and connectors have disconnection and broken wiring (CN01) Whether the resistance value/temperature Replace TD1 sensor characteristic of TD1 sensor is normal Replace outdoor PCB [A1] Exhaust temperature sensor (TD2) circuit Whether the Repair connecting wire of connectorwiring TD2 sensor and connectors have...
  • Page 82 [A6] Protection action of exhaust temperature sensor (TD1) Whether the gas pipe, liquid pipe and shutoff valve Fully open shutoff valve of outdoor unit are all open Whether outdoor PMV is normal 1.Connection of the connectors; Repair outdoor PMV 2.Wiring; 3.Winding; 4.Valve body; 5.Outdoor PCB Whether the resistance value/temperature characteristic of...
  • Page 83 [AA] High pressure sensor (Pd) loop Whether the Repair the connection and wiring ofthe connecto connection and wiring of the connectors of CN07 (high pressure sensor) are normal Whether the characteristic of high Replace high pressure sensor pressure sensor is normal Check outdoor I/F PCB, ifimproper, replace it [Ab] Pressure sensor (Pd, Ps) mismatching line Whether the...
  • Page 84 [AE] protection action of exhaust temperature at low freguency Whether the gas pipe, liquid pipe and shutoff valve of Fully open shutoff valve outdoor unit are all open Whether outdoor PMV is normal 1.Connection of the connectors; 2.Wiring; Repair outdoor PMV 3.Winding;...
  • Page 85 [b5] External input display, [b6] external interlocking display Whether the Check indoor PCB, if improper,replace it connector CN1 is connected to the external equipment Whether the Check external equipment, if improper,replace it external equipment can normally act Check the reason of action [b7] Inspection code display of secondary unit (only for central controller to display this code) Check indoor PCB, if improper,replace it Whether it runs in group...
  • Page 86 [bE] Protection action of low pressure Whether the Whether the relative indoor fan is normal Repair improper fan in cool can normally run 1.Connection of the connectors; portion 2.Capacitor; 3.Motor Whether the indoor filter or the heat exchanger is Check indoor PC board, blocked if improper, replace it Clean...
  • Page 87 [bb] Protection action of exhaust temperature (TD2) Whether the gas pipe, liquid pipe and shutoff valve Fully open shutoff valve of outdoor unit are all open Whether outdoor PMV is normal 1.Connection of the connectors 1.Wiring; Repair outdoor PMV 2.Winding; 3.Valve body 4.Outdoor PCB Whether the resistance Replace TD2 sensor...
  • Page 88 [E1] High pressure switch circuit for commercial compressor Whether the highpressure switch acts No Refer to the judgingsequence of comm Whether the commercial compressor IOL circuit is normal Whether the Check the part, ifimproper, replace part of commercial high pressure switch is normal Whether the Refer to the judgingsequence of comm shutoff valve is fully open...
  • Page 89 Whether the indoor fan is normal (heat) Whether the Modifying improper connection of the connectors, portion capacitor and fan motor are normal Whether indoor PMV is normal Whether connecting Modifying improper winding connection portion of the connectors are normal Whether there is the factor affecting indoor heat exchange...
  • Page 90 [E5] Inverter IOL action circuit Whether the IOL loop is normal? Repair IOL circuit 1.Connection of the connectors;2.Wiring; 3.Outdoor PCB; Whether the gas pipe, liquid pipe and shutoff valve Fully open shutoff valve of outdoor unit are all open Whether outdoor PMV is normal 1.Connection of the connectors;...
  • Page 91 [E6] Commercial IOL, OL circuit Whether the power supply is normal Whether the 1.Whether the supply voltage is resetting can be conducted Modify power supply, within 380V*10%; through the button of OL wiring. 2.Whether the power connecting terminal of the (manual resetting) commercial compressor has short circuit and missing phase.
  • Page 92: Characteristics Of Sensor

    4. Characteristics of sensor (1) Characteristic of temperature sensor Resistance (kΩ) Resistance (kΩ) (Below 10*) characteristic-3 characteristic-1 Outdoor TE Outdoor TA temperature temperature sensor sensor (Above 10*) 10 20 30 40 -30 -20 -10 10 20 30 40 50 60 70 (Temperature *) (Temperature *) Resistance (kΩ)
  • Page 93 (1) Characteristic of pressure sensor No. of terminal Name Color of wiring Black Out (high pressure side) White ------ ------ Out (low pressure side) Blue ------ ------ +12V High pressure side Low pressure side 0.5~4.5 V 0.5~4.5 V 1.0~25kgf/cm 1.0~8.33kgf/cm About 10.5 V Input Input...
  • Page 94 (1) Conversion table for data of sensor a. TA*TC sensor. Indoor unit saturated temp. Temp. Code Temp. Code Temp. Code Temp. Code Temp. Code (HEX) (HEX) (HEX) (HEX) (HEX) 38.0 57.5 -16.5 22.5 38.5 58.0 -16.0 23.0 39.0 58.5 -15.5 23.5 39.5 59.0...
  • Page 95 b. TS, TE sensor TS: SW01- "1", SW02- "2", TE: SW01- "1", SW02- "3" temp. * temp. * temp. * temp. * temp. * Code Code Code Code Code 165.90 30.27 9.92 -5.03 -21.17 135.40 29.73 9.61 -5.32 -21.55 119.39 29.20 9.29 -5.60...
  • Page 96 c. TD1, TD2 sensor TD1: SW01-"1" SW02-"0" TD2: SW01-"1" SW02-"1" temp. * temp. * temp. * temp. * temp. * Code Code Code Code Code 408.97 126.96 91.86 67.03 41.12 337.14 126.02 91.32 66.57 10.52 301.59 125.09 90.79 66.10 39.91 278.70 124.17 90.26...
  • Page 97 d. Pd, Ps sensor Pd: SW01-"1" SW02-"4" Ps: SW01-"1" SW02-"5" Code Code Code Code Code 17.0 17.5 18.0 18.5 19.0 19.5 20.0 20.5 21.0 21.5 22.0 22.5 23.0 23.5 24.0 24.5 25.0 25.5 26.0 26.5 10.0 27.0 10.5 27.5 11.0 28.0 11.5 28.5...
  • Page 98 (4) Check of output voltage of pressure sensor 0~30kgf/cm (0~25 kgf/cm : 0.5~4.5 voutput) a. Pd sensor Outdoor unit CN07*-* voltage between terminals (* terminal connects universal meter*meter pen) Indoor unit CN23*-* voltage between terminals (* terminal connects universal meter*meter pen) VOUT Pd value VOUT...
  • Page 99 0~10kgf/cm (0~8.33 kgf.cm : 0.5~4.5 voutput) Outdoor unit CN08*-*voltage between terminals (* terminal connects universal meter*meter pen) b. Ps sensor Indoor unit CN23*-*voltage between terminals (* terminal connects universal meter*meter pen) VOUT Ps value VOUT Ps value VOUT Ps value VOUT Ps value VOUT...
  • Page 100: Self-Checking Function For Fault Of Outdoor Unit

    5. Check function for fault of outdoor unit (I/F PCB) The content displayed on 7-segment nixie tube will switch according to the combination of SW01 and SW02. Content indicated in 7-segment nixie tube "0" indicates no display. SW01 SW02 Table of outdoor control data 0~15 Outdoor control data1 Detailed table 1...
  • Page 101 (2) Table 2 of outdoor control data Table of outdoor control data SW01 SW02 Outdoor TD1 sensor data (Hexadecimal system) sensor data (see page 93) Outdoor TD2 sensor data (Hexadecimal system) sensor data (see page 93) Outdoor TS sensor data (Hexadecimal system) sensor data (see page 93) Outdoor TE sensor data (Hexadecimal system) sensor data (see page 92)
  • Page 102: Led Display On Frequency Conversion Pc Board

    6. LED display on inverter PCB According to the position of SW01, the 4 LED (D25~D28) of frequency conversion can express the following content: (1) If the LED displaying <IGBT short circuit> protection has no abnormal locking, when shortening time, it will flicker in 5 Hz frequency.
  • Page 103: Wiring Diagram Of Outdoor Unit

    8. 220 V wiring diagram of outdoor unit AU96NFTAHA 220 V wiring diagram of outdoor unit : http://splitoff.ru/tehn-doc.html...
  • Page 104: Block Diagram Of Indoor Unit Control

    9. Block diagram of indoor unit control (MCC-1333-02: speed regulating of silicon control ) Remote contro- Remote contro- Central Timer ller (Slave) controller ller (Master) A B D CN12 Central management Indoor controller system 12V AC Transformer BUS communic- Serial com- ation circuit munication Cool...
  • Page 105 Block diagram of indoor unit control (MCC-1256 MCC-1234-01: relay speed regulating) Remote Remote Central Timer controller controller controller (Master) (Slave) A B D CN12 Central manageme Indoor controller nt system 12V AC Transformer BUS comm- Serial com- unication circuit munication Cool control BUS comm- system...
  • Page 106: Led Display On The Pc Board Of Indoor Unit

    Full abnormal stop display Light when indoor unit stops due to abnormality Indoor and outdoor unit Flicker when inputting outdoor unit communication Yellow communication signal D17 (Yellow) D16 (Red) HBS2 COMPONENT SIDE 1 2-CEILING HEIGHT Haier MCC-1333-02 HBS1 I/O UNIT No. SW01 CN15 CN24 CN06 CN17 CN25 CN13...
  • Page 107: Display Of Remote Control Unit

    11. Display of remote controller In the following cases, the remote controller will display "standby" or "preheat defrost". 1) "standby" display The fan may run, but the indoor unit PMV does not start (refrigerant does not circulate). Capability overloading of indoor unit When the total Hp of indoor unit exceeds 1.35 times that of outdoor unit, indoor unit will enter into state of stand-by.
  • Page 108: Position Of Switches Before Delivery

    13. Position of switches before delivery Number of SW Function Content of function Position when delivery Number setting Setting in group running control SW01 of indoor unit 0: master unit 1~15: slave unit No.7: ON, remote controller can not set address No.7: OFF, remote controller can set address Address setting of SW02...
  • Page 109: Switch Setting Content

    14. Switch setting content Table of relationship between setting content of dial switch SW02 and address of central control *Under the state of power supply cutting off, turn the 7th position of dial switch SW02 to ON side. At that time the remote controller is forbidden to use to set address.
  • Page 110: Inspecting Points Of Control Panel Of Outdoor Unit

    15. Indoor unit circuit (1)Inspecting point of indoor unit PCB MCC-1333-02 (Speed regulating type of silicon control) : http://splitoff.ru/tehn-doc.html...
  • Page 111 (2)Inspecting points MCC-1334-01 of outdoor unit (Speed regulating type of relay) : http://splitoff.ru/tehn-doc.html...
  • Page 112: Block Diagram Of Outdoor Unit Control

    16. Block diagram of outdoor unit control (1) Control block diagram of outdoor unit Suitable for AU96NFTAHA Electric DSA 3KV reactor Surge absorption 560V PTC starter (posisor) x 2 (MCC1253) 30A,600V 100Ω/500v (tdk) 820V AC contactor MG-SW1 AC contactor #-phase...
  • Page 113 (2) Inspecting point of outdoor unit I/F PCB MCC-1332-02 CN19 CN20 CN15 CN14 CN11 D801 IC19 R127 IC26 2 1 4 R134 R121 R147 R117 R155 RY01 RY02 R146 R115 R141 R151 R151 R152 +12V R161 T6.3A 250V~ R151 RB01 RB15 RB02 RB04...
  • Page 114 (3) Inspecting point of INV PCB (MCC-1331-01) : http://splitoff.ru/tehn-doc.html...
  • Page 115 IGBT drive IGBT drivecircuit output XY Z supply R phase, circuit output U circuit output phase W phase N phase CN20 CN22 CN24 CN23 CN25 D32 R15 IC03 IC02 IC04 IC07 IC06 IC05 Haier MCC-1252-04 CN21 Converter drive input : http://splitoff.ru/tehn-doc.html...
  • Page 116 (5) Checking gate drive circuit of IGBT PCB(MCC-1252-04) a. Measuring gate drive voltage Measuring part Voltage U phase IC02 V phase IC03 24.5*0.5V W phase IC04 XYZ phase IC05 b. Checking the signal to IGBT Pull out the connectors on IGBT PCB CN22, CN23, CN24 and CN25, check the voltage value of eachindicator. Check all items when it is in Thermo ON and Thermo OFF.
  • Page 117 (6) Judging whether the IGBT is normal Resistance value when IGBT is normal About 47 k* About 47 k* Above 40 k* Above 100 k* Above 100 k* Note 1) As the testing instrument may not be consistent, so when testing the normal elements, the testing value 1)Transportation, packing A)Packing with conductive foam, plastic bag or aluminum foil.
  • Page 118: Back Up Running

    17. Back up running a. Indoor unit When the sensor of indoor unit have fault as shown in Table 1, it will automatically enter into back up runningwhile displayi Table 1 Sensor with fault Treatment Inspection code Conduct normal control by using another TC sensor Automatic back up running Pressure Automatic back up running...
  • Page 119 (1) Back up running function possessed by outdoor unit Please open the following switches and conduct back up running through operating the switches (excluding TS, TE sensor). Operation must be conducted after cutting off the main power supply. Operating the switches with power supply switching on can not enter into back up running mode.
  • Page 120 (2) Back up running method of outdoor unit 1. Inverter running (6 HP outdoor unit does not have this function) When the inverter circuit or the inverter compressor has fa SW03 (1)Cut off the main power supply; (2)Turn the first digit of SW03 on the outdoor unit I/F PCB to ON state; (3)Switch on the main power supply, conduct normal trial run;...
  • Page 121: Decomposition Method

    18. Decomposition method a. Indoor unit (1) Cassette type with airflow in four directions Step (Sequence) AB092FEAIA AB182FEAIA Category Repair part Points for attention AB122FEAIA AB242FEAIA AB142FEAIA AB282FEAIA AB162FEAIA AB322FEAIA Air outlet 1. Remove the installing screws on both sides and remove the grill Remove from the air outlet grill 1.
  • Page 122 Step (Sequence) Category Repair part Points for attention AB092FEAIA AB182FEAIA AB122FEAIA AB242FEAIA AB142FEAIA AB282FEAIA AB162FEAIA AB322FEAIA 1. Remove the electronic expanding valve coil with double-head wrench, do not tighten the expanding valve excessively *1 Remove the fixing plate for refrigerant pipe 2. Remove the water tray Electronic 2.
  • Page 123 Main body Item Method Key point Please record the original state The parts can before be repaired decomposing. without removing the top panel. The drainage Grill Remove the air pump can beinspected without inlet grill and filter screen, Drainage conduct pump operation from the air inlet.
  • Page 124 Ceiling Item Method Key point Please record thes t a t e o f t h e a Repair of lifting grill When replacingthe cam, pleasea Repair ofsingle grill 1. Remove the screw for fixing horizontal grill to make the grill in horizontal state. 2.
  • Page 125: Outdoor Unit

    b. Outdoor unit (1) Remove the front panel; (M6 x 4, M4 x 1);(2) Remove the cover of electric control b (4) Remove the installation plate of pressure sensor; a. Replacing and inspection of (5) Remove the whole wiring in the electric control box; Temperature sensor, press electrical parts Installation plate of...
  • Page 126 (1)Remove the front panel (M6 x 4, M4 x1); (2)Recover the refrigerant; (3)Remove the electric control box;(4)Remove the exhaust temperature sensor (8 pieces), suction t c. Replacing of compressor (6) Remove the coil box of reactor, reactor coil (M4 x 8); (7) Remove the sound insulation box;...
  • Page 127 Replacing of pressure sensor <Decoration method of pressure sensor> (1) Remove the pressure sensor cover of the electric control box;(2) Remove the installation plate of the pressure senso (3) After clamping the capillary pipe of the pressure sensor replaced, conducting zinc welding to remove it;(4) Remove the connectors of the pressure sensor replaced from Pressure (5) Remove the pressure sensor.
  • Page 128 AU96NFTAHA (1) Remove the front panel (m6x4, M4x1); 1. Replacing and inspection of electrical part (2) Remove the electric control cover (M4 x 4); <Inspection> (3) Remove the pressure sensor cover (M4 x1); (4) Remove the installation plate of the pressure sensor (M4 x 3);(5) Remove the whole (6) Remove the electric control box (M4 x 4).
  • Page 129 AU96NFTAHA (1) Remove the left, right front panel (M6 x 4, M4 x1);(2) When the system pressure of rec 3. Replacing of (3) Remove the electric control box; compressor (4) Remove the front supporting pole (front) (M9x9, M4x1); Electric control...
  • Page 130 AU96NFTAHA (9) Remove the suction temperature sensor on the suction pipe side (1) , remove the suction pipe; Remove two portions (Suction pipe) Balance tube Remove two portions (outlet pipe) (10) Remove the balance tube on the suction pipe; (11) Remove the fixing nut for compressor (M10x3);...
  • Page 131 DISTRIBUTED BY: Add:Haier Industrial Park,Haier Road, Hi-Tech Zone, Qingdao, China Tel: +86 532 8938396 Fax:+86 532 8938736 Http://www.haier.com E-mail:acieeuro@haier.com Please note that the model and specification of the product in this book may be change without notice for further improvement on quality and performance.