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Haier AB242ACBEA Service Manual

Commercial air conditioning 24 28 universal outdoor unit air conditioning
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24 28 Universal Outdoor Unit air conditioning
Features
Auto-Restart function
Group control(with a group controller)
Auto-changeover
The same outdoor unit can match with cassette \convertible\
duct type indoor unit
With new environment friendly refrigerant R407C
Remotoe control and Wired remote control(Optional)
Weekly timing(with a weekly timer)
MANUAL CODE: SYJS-005 -03 Rev.0

Service Manual

Commercial Air Conditioning
AB242ACBEA+AU242AHBEA
AC242ACBEA+AU242AHBEA
AD242AMBEA+AU242AHBEA
AD242AHBE A+ AU242AHBEA
AP242ACBE A+ AU242AHBEA
AB28NACBEA+AU28NAHBEA
AC28NACBEA+AU28NAHBEA
AD28NAMBEA+AU28NAHBEA
Haier Group
AU282AHBEA
.

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  Summary of Contents for Haier AB242ACBEA

  • Page 1: Service Manual

    Service Manual Commercial Air Conditioning 24 28 Universal Outdoor Unit air conditioning AB242ACBEA+AU242AHBEA AC242ACBEA+AU242AHBEA AD242AMBEA+AU242AHBEA AD242AHBE A+ AU242AHBEA AP242ACBE A+ AU242AHBEA AB28NACBEA+AU28NAHBEA AC28NACBEA+AU28NAHBEA AD28NAMBEA+AU28NAHBEA AU282AHBEA Features Auto-Restart function Group control(with a group controller) Auto-changeover The same outdoor unit can match with cassette \convertible\...
  • Page 2: Table Of Contents

    CONTENTS CONTENTS Contents……..........…...………...…….1 1. Description of Products & Features…………………...…….2 2. Specifications…………………………. ………………...……8 3. Safety precaution…………………………..………………….12 4. Net dimensions of indoor and outdoor unit………………...14 5. Installation instructions ……………………. ………………. 16 6. Parts and functions …………………………..…… ..……….19 7. Remote controller functions………………………….………22 8. Refrigerant diagram…………………………..……………..24 9.
  • Page 3: Description Of Products & Features

    1 .Description of Products & Features Products coding direction United Outdoor unit: A U 24 2 A H B E A Climate type: T1 (see table 1) Design number E Product type: A stands for heat pump type, refrigerant is R22 B stands for heat pump type, refrigerant is R407 M stands for cool only type, refrigerant is R22 N stands for cool only type, refrigerant is R407...
  • Page 4 a) Description of the coding rule of the models A U 28 Climate type:T1 Design serial number Product type: heat pump R407C Appearance features Product series:one-to-one Adaptive voltage:380-400V/50Hz Cooling capacity:28=28000BTU/h Outdoor unit Air conditioner A B 28 Climate type:T1 Design serial number Product type: heat pump R407C Appearance features Product series:one-tag-one...
  • Page 5: Convertible Type

    c)Brief introduction of the series: Convertible type: AC242ACBEA AC28NACBEA (1).Ceiling convertible,flexible installation,convenient maintenance,saving the users' expenditures (2)Adopting single-phase & three-phase power supply,applicable for household and commercial usage (3).Dual air outlet design,floor air blowing,accelerating the indoor air circulation, quick temperature adjustment (4).Long-distance air blowing,large power,large cooling/heating ratio (5).Intelligent remote control,convenient and flexible control...
  • Page 6: Cassette Type

    Cassette type: AB242ACBEA AB28NACBEA Products characteristic: Completely invisible machine body: The whole machine body is completely concealed inside the ceiling. Due to its compact size it neither breaks the harmonization of indoor decoration nor occupies the indoor spaces. The stylish look of air conditioner allows it to blend right into ceiling.
  • Page 7 T2\ T3 working condition d). Brief Introduction for T1\ Climate type Climate type Type of Air Conditioner Type of Air Conditioner Cool only Cool only 43 0 Heat pump Heat pump Electricity heating Electricity heating...
  • Page 8: Specifications

    2 Specifications Model AU242AHBEA AC242ACBEA AB242ACBEA AD242AMBEA AD242AHBEA Item Cooling capacity① Btu/h 24000 24000 24000 24000 24000 Heating capacity① Btu/h 27000 27000 27000 27000 27000 Power 1PH 220-230V 50Hz Cooling power(W) 2700 2700 2700 2700 2700 Cooling EER(Btu/W) 8.89 8.89 8.89...
  • Page 9 AP242ACBEA item Model cooling heating Function 24000 28000 Capacity BTU/h Capacity Total power input Max. power input EER or COP Dehumidifying capacity 10‐³×m³/h 3*3.0 Power cable 1, 220~230, 50 Power source N,V,Hz 13.5/16 14.5/19.5 Running /Max.Running A / A current Start Current Fuse AP242ACBEA...
  • Page 10 item Model AU28NAHBEA Function Cooling Heating BTU/h 28000 32000 Capacity Total power input 3200 3300 Max. power input 4500 5500 BTU/W EER or COP 8.75 10‐³×m³/h Dehumidifying capacity Power cable 3N 380V-400V 50HZ Power source N,V,Hz Running /Max.Running Cooling 5.5/8.0 Heating 5.8/9.5 A / A current Start Current...
  • Page 11 AU282AHBEA Item Model cooling heating Function 28000 34000 Capacity BTU/h Capacity Sensible heat ratio 3400 3600 Total power input 4300 4600 Max. power input 2.41 2.77 EER or COP 2.47 Dehumidifying capacity 10‐³×m³/h 3*3.0 Power cable 1, 220-240, 50 Power source N, V, Hz Running /Max.Running cooling: 16A/20A heating: 17A/22A...
  • Page 12 item Model AD28NAMBEA Function Cooling Heating BTU/h Capacity 28000 32000 Total power input 3200 3300 Max. power input 4500 5500 BTU/W EER or COP 8.75 10‐³×m³/h Dehumidifying capacity Power cable 3N 380V-400V 50HZ N,V,Hz Power source A / A Running /Max.Running Cooling :5.5/8.0 Heating :5.8/9.5 Start Current AD28NAMBEA(WHITE)
  • Page 13 item Model AC28NACBEA Function Cooling Heating BTU/h Capacity 28000 32000 Total power input 3200 3300 Max. power input 4500 5500 BTU/W EER or COP 8.75 10‐³×m³/h Dehumidifying capacity Power cable 3N 380V-400V 50HZ N,V,Hz Power source A / A Running /Max.Running Cooling :5.5/8.0 Heating :5.8/9.5 Start Current...
  • Page 14 item Model AB28NACBEA Function Cooling Heating BTU/h 28000 32000 Capacity Total power input 3200 3300 Max. power input 4500 5500 BTU/W EER or COP 8.75 10‐³×m³/h Dehumidifying capacity Power cable 3N 380V-400V 50HZ Power source N,V,Hz A / A Running /Max.Running Cooling :5.5/8.0 Heating :5.8/9.5 Start Current...
  • Page 15: Safety Precaution

    SAFETY PRECAUTIONS 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 CAUTION resulting in death or serious injury are listed in the section.
  • Page 16 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. Always use accessory parts and authorized parts for installation construction.
  • Page 17: Net Dimensions Of Indoor And Outdoor Unit

    4.Net dimensions of indoor and outdoor unit Indoor unit Models 1) AB242ACBEA AB28NACBEA 2) AD242AMBEA AD28NAMBEA fresh air outlet drainage pipe liquid pipe gas pipe -14-...
  • Page 18 3) AD242AHBEA AC242ACBEA...
  • Page 19 5)AC28NACBEA 1320 1200 6)AU242AHBEA AU28NAHBEA AU282AHBEA Screw Hole (M10) 1024 Power Wiring Terminal Power Wiring Distribution Hole -15-...
  • Page 20: Contents

    5.Installation Instructions 1. Installation Tools 1) Driver 2) Hacksaw 3) Hole core drill 4)Hexagon wrench(5mm) 5) Spanner(14,17,19 and 24mm) 6) Torque wrench(17,22,24mm) 7) Pipe cutter 8) Flaring tool For example: use two spanner to joint the pipe 2. Standard Accessories The standard accessories includes : 1) Measuring type 2) Reamer 3) Refrigerant oil 4) Gas leakage detector or soap-and-water solution 5) Knife 6) Nipper 3.
  • Page 21 <Heat Pump model/Cooling Only model > WARNING BE SURE TO READ THESE INSTRUCTIONS CAREFULLY BEFORE BEGINNING INSTALLATION. FAILURE TO FOLLOW THESE INSTRUCTIONS COULD CAUSE SERIOUS INJURY OR DEATH, EQUIPMENT MALFUNCTION AND/OR PROPERTY DAMAGE. BE SURE TO READ INSTALLATION MANUAL FOR INDOOR UNIT WITH THIS MANUAL. 1.
  • Page 22 4. Refrigerant piping Check joint Flare connection Service valve Gas pipe (1) Outline piping Outdoor Indoor unit unit (2) Piping size Liquid pipe Flare connection Model 14,18 series 24,28 series 36,42 series Gas piping 15.88(5/8")x1.0mm 15.88(5/8")x1.0mm 19.05(3/4")x1.0mm Liquid piping 6.35(1/4")x0.8mm 9.52(3/8")x0.8mm 9.52(3/8")x0.8mm Install the removed flared nuts to the pipes to be connected,...
  • Page 23: Electric Wiring

    If it does not stop gas leakage, discharge In case of gas leakage, tighten whole refrigerants from the serice port. 2-way valve parts of pipe connection. If No gas leakage? After flaring work again and vacuumize, leakage stops, then proceed 3-way valve fill up prescribed refrigerant from the gas steps.
  • Page 24: Outdoor Unit Installation

    Outdoor Unit Installation 1. Accessories Edging "Edging" for protection of electric wires from an opening edge. 2. Selection of the place of installation Select the place of installation satisfying the following conditions and, at the same time, obtain a consent from the client or user. Place where air circulates.
  • Page 25 (2) Piping size Liquid pipe 9.52x0.8mm AU242AHBEA 90+0.5 Install the removed flare nuts to the pipes to be connected, then flare the pipes. Gas pipe 15.88x1.0mm (3) Limitations for one way piping length and vertical height difference. One way piping length: less than 30m (for AU242AHBEA Vertical height difference:...
  • Page 26 5. Air discharging method After finishing connection of refrigerant pipe, it shall perform air tightness test. The air tightness test adopts nitrogen tank to give pressure according to the pipe connection mode as the following figure shown. The gas and liquid valve are all in close state. In order to prevent the nitrogen entering the circulation system of outdoor unit, tighten the valve rod before giving pressure (both gas and liquid valve rods).
  • Page 27 6. Piping and indoor unit vacuumizing Use vacuum pump to perform vacuumizing. It is strictly forbidden to use the refrigerant to remove the air inside the system. After air tightness test and discharging all the nitrogen, connect the vacuum pump as the following figure shown.
  • Page 28 Warning · The distributing shop, where you brought the air conditioner, or the specified shops shall do the installation work. If you do the installation work by yourself, the improper installation will cause water leakage, electric shock fire and other accidents. ·...
  • Page 29: Special Work And Main Points In Installation

    5.3 Special Work and Main Points in Installation Warning · During installation, if refrigerant leakage occurs, ·After finishing installation, confirm the refrigerant take ventilation measurement immediately. gas dose not leak. ·If the refrigerant gas leaks in the room, once it ·...
  • Page 30: Installation Instructions

    INSTALLATION INSTRUCTIONS 5 INSTALLATION INSTRUCTIONS 5.1 Installation tools 1. Cross screwdriver 2 .Metal saw 3 .60,70mm drill 4. Inner hexagon spanner, shifting spanner 5 .Spanner(14, 17, 19,24,27mm diameter) 6. Pipe cutter 7. Pipe expander 8. Knife 9 .Pliers 10. Leak detector or soap liquor 11.
  • Page 31 INSTALLATION INSTRUCTIONS (2) Ceiling height Indoor unit can be installed on ceiling of 2.5-3m in height. (Refer to Foeld setting and Installation Manual of ornament panel.) (3) Install suspending bolt. Check if the installation place is strong enough to hold weight. Take necessary measures in case it is not safe.
  • Page 32 INSTALLATION INSTRUCTIONS AB24,28 Refrigerant pipe Suspending bracket Suspending bolts (Distance between suspending bolts) Ceiling 840(Indoor unit) 890(Ceiling opening) 950(Ornament panel) AB36,42 890(Ceiling opening) Note: 1070 (Distance between suspending bolts) Dimension of ceiling opening marked with * can be as large as 910mm, but the matching part of ceiling with ornament panel shall be over 20mm.
  • Page 33: Refrigerant Piping

    INSTALLATION INSTRUCTIONS 5.3.4 Installation In the case of new ceiling (1) Install unit temporally Put suspending bracket on the suspending bolt. Be sure to use nut and washer at both ends of the bracket. As for the dimensions of ceiling hole, see paper pattern. Ask your real estate dealer for details. Center of the hole is marked on the paper pattern.
  • Page 34 INSTALLATION INSTRUCTIONS 5.3.6 Installation of drainage pipe (1) Install water drainage pipe Pipe dia, shall be equal or larger than that of unit piping.(pipe of polyethylent; size: 25mm; O.D:32mm) Drain pipe should be short, with a downward slope at least 1/100 to prevent air bag from happening. If downward slope can't be made, take other measures to lift it up.
  • Page 35: Specifications

    INSTALLATION INSTRUCTIONS 5.3.7 Wiring All supplied parts. materials and wiring operation must in appliance with local code and regulations. Use copper wire only. When make wiring, please refer to wiring diagram also. All wiring work must be done by qualified electricians. A circuit breaker must be installed, which can cut power supply to all system.
  • Page 36 INSTALLATION INSTRUCTIONS (2) Remove cover plate at corner Tear off the adhesive tape, and slide it off. (Refer to Fig. 3) Slide Adhesive tape Fig. 3 2. Install ornament panel on indoor unit. For indoor unit installation, please refer to Installation Manual. Fig.
  • Page 37 INSTALLATION INSTRUCTIONS 4. Installation of inlet grill and cover plate Installation of inlet grill Install in reversed order of “Prepare ornament pandl”. Inlet grill can be adjusted into four directions by turning inlet grill. Inlet grill position can be adjusted as per customers request.
  • Page 38 Preparation before installing convertible type unit Before installation of convertible type unit, please confirm which type will be selected: in the ceiling or on the floor. There is a dial switch K1 on the PCB, if you select D, that means the installation is in the ceiling.
  • Page 39 Installation procedure of convertible type unit Wrap the insulation around the drain hose INSTALLATION PROCEDURE connection.(Fig.6) Install the room air conditioning unit as follows: (Fig. 6) Drain pan PREPARING INDOOR UNIT INSTALLATION FIRST REMOVE THE INTAKE GRILL Insulation A. FLOOR MOUNTING (Drain hose) Drain hose (AC36/42 only suitable for...
  • Page 40 Installation procedure of convertible type unit 4. INSTALLING INDOOR UNIT CAUTION Reset the hex bolts as shown in Fig.14. Install the drain hose at the rear; it should not be installed on the top or right side. After the piping and drainage exit has been selected, Fig.
  • Page 41 Wiring ELECTRICAL WIRING CAUTION (1) Match the terminal block numbers and connection cable colours with those of the outdoor unit. Incorrect wiring may cause damage to the electrical parts. (2) Connect the connection cables firmly to the terminal block. Incorrect installation may result in a fire. (3) Always fasten the outside covering of the connection cable with the cable clamp.(If the insulation is chafed, a short curcuit may occur.)
  • Page 42: Customer Guidance

    Wiring (2) Pull out the electrical component box. Fig. 27 (3) Remove the electrical component box cover. Fig. 28 Base Electrical component box cover Remove the three tapping screws CAUTION Be careful not to pinch the wiring between the electric component box and base.
  • Page 43 Installation procedure of mid ESP duct type NOTICE All Wiring of this installation must comply with NATIONAL, STATE AND LOCAL REGULATIONS. These instructions do not cover all variations for every kind of installation circumstance. Should further information be desired or should particular problems occur, the matter should be referred to your local distributor.
  • Page 44 Hanging bolt (5) Installation of indoor unit M10 nut M10 washer Fix the indoor unit to the hanger bolts.If required, it is possible to suspend the unit to the beam, etc. Directly by use of the bolts without using the hanger bolts. M10 spring washer Main unit Note...
  • Page 45 Secure the elevation as high as possible When constructing drain piping for several units, position (approx. 100 mm) the common pipe about 100 mm below the drain outlet of each unit as shown in the sketch. Use VP-30(11/4") or thicker pipe for this purpose. VP 30 A downhill grade of 1/100 or more...
  • Page 46 (7) Installation work for air outlet ducts Air conditioner main unit Heat inlet duct insulation (optional or Suction panel Ceiling surface marketat item) (Silent panel) A Blowout duct B Special blowout special inlet (option) (Optional or marketed item) (Option) (with air filter) Hole for check Calculate the draft and external static pressure and select the length, shape and blowout.
  • Page 47 Indoor unit installation (High ESP Indoor unit installation (High ESP duct) 1. Before installation [Before finishing installation, do not throw the attached parts installation needs] Confirm the way to move the unit to the installation place. Before moving the unit to the installation place, do not remove their packages. When have to remove the package, use a soft material or protection board with rope to lift the unit assembly to avoid unit damage or bumping a scrape.
  • Page 48 3. Preparation before installation (1) The position relation among hoisting screw (unit: mm) AD242AHBEA Down side Up side (2) If necessary, cut the opening installation and checking needed on the ceiling. (If has ceiling) Before installation, finish the preparation work of all the pipes (refrigerant, drainage) and wire (wire controller connection wire, indoor and outdoor unit connection wire) of indoor unit, so that after installation, they can be immediately connected with outdoor unit.
  • Page 49: Drain Piping

    Hanging bolt 4. Installation of indoor unit M10 nut M10 washer Fix the indoor unit to the hanger bolts. If required, it is possible to suspend the unit to the beam, etc. Directly by use of the bolts without using the hanger bolts. M10 spring washer Main unit Note...
  • Page 50 Air suction grille with air filter Checking meatus Please consult the after-sales service worker of Haier Air Conditioner for the choosing and installation of suction inlet, suction duct, discharging outlet and discharging duct. Calculating the design drawing and outer static pressure, and choose the discharging duct with proper length and shape.
  • Page 51 The length difference among every duct is limited below 2:1. Reduce the length of duct as possible as can. Reduce the amount of bend as possible as can. Use heat insulation material to bind and seal the part connecting main unit and the flare part of air discharging duct.
  • Page 52 8. The attentive matters in installation of air suction and discharging duct Recommend to use anti-frost and sound-absorbing Special air discharging outlet duct. (locally bought) The duct installation work should be finished Use screw bolt to fix before the fitment of ceiling. The duct must be heat insulated.
  • Page 53 10. The operation method of fan controller Through the fan controller switch in the electric box, the air volume of this unit can be continuously adjusted. It is unnecessary to adjust air volume through the duct side wind level (unit outside static adjustment). The air volume set should be in the operation air volume range.
  • Page 54: Refrigerant Pipe

    11. Refrigerant pipe [The air side pipe, liquid side pipe must be faithfully heat insulated, if no heat insulation, it may cause water leakage.] The outdoor unit has been charged with refrigerant. When connect the pipe to the unit or dismantling the pipe from the unit, please follow the figure shown, use spanner and torque spanner together.
  • Page 55: Parts And Functions

    Swing fender (located in the outlet) Refrigerant pipe Cable line Outlet Earthing line Air filter (located in the suction grill) Remote Controller Air inlet AB242ACBEA AB28NACBEA High ESP duct type: Air outlet Duct Duct Drainpipe Air inlet...
  • Page 56 PARTS AND FUNCTIONS POWER OPER TIMER COMP EMER Fig.2 Fig.1 Indoor Unit Fig.1 1 Operating Control Panel (Fig.2) 2 Emergency switch 3 Remote Control Signal Receiver 4 Power Indicator Lamp (Red) 5 OPERATION Indicator Lamp (Green) 6 TIMER Indicator Lamp (Yellow) AC242ACBEA 7 Compressor Run Lamp (Green) 8 Intake Grill (Fig.3)
  • Page 57: Remote Controller Functions

    7.Remote controller functions REMOTE CONTROLLER FUNCTIONS 4.Operation MODE Remote controller Used to select operation mode. Every time you press MODE button, operation mode changes according to following sequence: AUTO HEAT COOL 5.HEALTH Button Used to set health mode, if the unit has the negative ion function and oxygen bar function.
  • Page 58: Fan Button

    18.FAN Button The distance between the remote controller and the receiver should be max 7m and there should be no obstacle between them. Used to select fan speed:LOW,MID,HIGH,AUTO. Do not throw the remote controller; prevent it from being 19.TIMER OFF Display damaged.
  • Page 59 Fan Operation 1.Unit start Press ON/OFF button to start your air conditioner. Previous operation status appears on LCD (except for TIMER, SLEEP, and SWING setting). 2.Select operating mode Press MODE button. At each press, operation mode changes as follows: COOL HEAT AUTO Then select FAN...
  • Page 60: Temperature Setting

    AUTO, COOL , HEAT and DRY Operation 1. Unit start Press ON/OFF button,unit starts. Previous operation status appears on LCD (except for TIMER, SLEEP and SWING setting) 2.Select operation mode Press MODE button. At each press, operation mode changes as follows: TEMP AUTO COOL...
  • Page 61: Adjusting Air Flow Direction

    Adjusting air flow direction AUTO SWING AUTO SWING Press SWING button. Up and down airflow varies upwards When the automatic swing louver moves to the proper and downwards. Left and right airflow angle, press SWING button can fix the airflow direction. varies left and right sides.
  • Page 62: Sleep Function

    Sleep Function Before going to bed you can press down the SLEEP button and the air conditioner will run so as to make you sleep more comfortably. Before using this function, the clock must be set. Use of SLEEP function After the unit's start, set running mode and then press SLEEP button once to make the air conditioner have the previous-set sleep time (first power-on is "1h").
  • Page 63 Timer ON/OFF Function Set clock correctly before starting TIMER operation 1.Unit start After unit start, select your desired operation mode (operation mode will be displayed on LCD) 2.TIMER mode selection Press TIMER button on the remote controller to change TIMER mode.
  • Page 64 Timer ON-OFF Function Set clock correctly before starting TIMER operation 1.Unit start After unit start, select your desired operation mode (operation mode will be displayed on LCD) 2.TIMER mode selection Press TIMER button on the remote controller to change TIMER mode.
  • Page 65 Filter Up/Down (Only for AB182ACBEA) After the air conditioner has operated for a certain period, dust has accumulated on the filter, and the filter up/down function can be used to clean it. 1.Whether unit starts or stops, continuously press FILTER button for 3 seconds, and enter the filter up/down waiting status (when unit stops, the yellow TIMER indicator flashes, and filter and clock indication are displayed on the remote...
  • Page 66 " High mode " Operation Outline of operation in "High Mode" This function is suitable when the set temperature must be reached in the shortest delay. The button "HIGH/SO", referred to this function, is effective in Cooling/Heating mode (not in Auto/Dry/Fan modes). TEMP Press the HIGH/SO button noce The indication...
  • Page 67 " Soft mode " Operation Outline of operation in "Soft Mode" Operation in "Soft Mode", more silent, is suitable when noises should be reduced, e.g.. for reading or sleeping. The button "HIGH/SO", referred to this operation, is effective in Cooling/Heating mode (not in Auto/Dry/Fan modes). TEMP SWING MODE...
  • Page 68 Auto restart function setting TEMP SWING MODE SLEEP HEALTH FRESH CLOCK TIMER HIGH/SO FILTER LIGHT LOCK RESET CODE Setting method (to be applied for a necessary situation) : After the power failure compensation is set, if power failure suddenly occurs while the air conditioner is working, it will resume the previous working state when the power is supplied again.
  • Page 69: Wired Controller Functions

    Wired controller functions: Buttons and functions of the wired controller MODE CLOCK Used to adjust time. Used for select indoor operation TIMER mode. Used to set timer mode. FAN SPEED CHECK Used for select indoor air flow. Auto-diagnostic button. SWING Used for setting indoor swing mode.
  • Page 70 Buttons function: MODE:used for select indoor operation mode. FAN:used for select indoor air flow. SWING:used for setting indoor swing mode. HEALTH:used for setting indoor health function. TEMP + -:used for changing set temperature. CLOCK:used to adjust time. +、-:stands for time plus/minus, used to adjust time. TIMER:used to set timer mode.
  • Page 71 [FAN] [HIGH]:high fan speed [FAN] [MED]: medium fan speed [FAN] [LOW]: low fan speed [FAN] [FIX]: fixed fan speed, it will display only when fixed fan speed is requested to main indoor unit. [CENTRAL]: central control mode [OPERATION] :running mode [STAND BY] :...
  • Page 72 AUTO operation, COOLING, HEATING and DEHUMIDIFICATION operation 1) Start up operation: press the button of ON/OFF, the system will start up, and will display [MODE][AUTO];[FAN][AUTO];[ROOM TEMP.]+“24℃” ;[CLOCK]+”12:00”. 2) Select MODE: press the MODE button, then you will see in the display section [MODE] switch over in below sequence:[FAN ONLY]→[COOL]→[DRY]→[HEAT]→[AUTO]→[FAN ONLY].
  • Page 73 TIMER ON, press [TIMER]. [TIMER][ON] will be constant on. Then [TIMER] [OFF] flashes, press the clock +/- button to adjust the time of TIMER OFF, press [SET]. The time sequence of timer on and timer off will determine the mode is [TIMER] [ON] →[OFF] or [TIMER] [OFF] →[ON].
  • Page 74 CENTRAL control function When the central controller selects [CENTRAL] mode, the buttons in the wired controller except for [CHECK] will be invalid. VENTILATION mode (only for the unit with fresh air function or heat recovery function) Press [RECOVERY] button, then the unit will switch over the ventilation mode: [VENTILATION][AUTO] [VENTILATION][RECOVERY] →...
  • Page 75 Preset ――― Outdoor total capacity Actual value, decimal In check mode, press [CHECK] to quit the check mode, and go into normal running mode. How to change the function switches? Type State of Function description switch Changeover Wired Connected Central controller controller central Cut off...
  • Page 76: Failure Code

    controller, if the central controller is set to “central”, the buttons in the wired controller will be invalid, or the buttons will be valid. Failure code: Failure remote central code on type, control, Failure description Reason Remarks wired flash failure controller times code...
  • Page 77 2m continuously 13(0DH) Solenoid valve Solenoid valve ○ abnormal incorrectly times continuously 76(4CH) Discharging temp. Sensor broken down or ○ sensor abnormal short circuit for more than 2m continuously 05(05H) EEPROM abnormal EEPROM data missing Run as the default value 84(54H) Pressure Low pressure switch acts in...
  • Page 78 If you use central control type, SW1, SW2 will be used simultaneously. Wiring request in central control type: port A-B is connected with indoor port CN16(A-B) through 2-core shield wire. Requirements: 1. Port A connects with port CN16(A)of all indoor units. 2.
  • Page 79 -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- --------...
  • Page 80 -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- --------...
  • Page 81 -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- --------...
  • Page 82 Electrical functions of wired controller: 1.Function difference between master wired controller and slave one: Contrastive items Master wired controller Slave wired controller Function All of functions Only with below functions: ON/OFF, MODE, FAN SPEED, SET TEMP., SWING 2. Wiring connections of wired controller: indoor 1 indoor 2 indoor N...
  • Page 83 B. One wired controller controls one indoor unit, and the indoor unit connects with the wired controller through 3 pieces of polar wire. C. Two wired controllers control one indoor unit. The wired controller connected with indoor unit is called master one, the other is called slave one.
  • Page 84: Refrigerant Diagram

    .Refrigerant Diagram Outdoor unit Indoor unit muffler one way vavle heat exchanger of 4-way vavle indoor unit compressor air-liquid departor Cooling operation Heating operation -44-...
  • Page 85: Electrical Control Functions

    9.Electrical Control Functions Flow Chart for Operation 1) Turn on/off unit Control function treat module Power indicator turn off, operation indicator turn On/off Trouble indication Trouble Mode determinati Buzzer sound twice, Abnormal refuse receive operation signal Chose mode Fan motor turn off, electronic expansion Cooling Heating...
  • Page 86 2) Cooling operation Cooling Swing flap in the Swing cooling standard position Swing action Adjust speed according Automatic temperature set and in fan speed Operate in fan speed set Electronic expansion valve: overheat control, Swing flap: Test cooling standard position , Fan motor: high speed Electronic expansion valve: Rated...
  • Page 87 Note: ① When abnormal phenomenon occur, the indoor unit indicator will indicate abnormality according to the abnormal parts. ② When temperature of the evaporator inlet is lower than 0℃ and keeps for 5 minutes, unit will operate in anti-icing mode. 3)Dehumidifying operation Dehumidifying Swing flap in the cooling...
  • Page 88 4) Heating operation Heating operation Swing flap in set fan Swing speed position Swing action side: wind off, Defrosting expansion valve steady side: Electronic expansion valve totally open Rated According to temperature Fan motor operate in rated sensor to adjust state and fan speed valve open degree If stop unit...
  • Page 89 10. Diagnostic information 10.1 Failure code remote control type unit: indoor running failure description lamp flash times indoor ambient temp. sensor failure indoor coil temp.sensor failure outdoor ambient temp. sensor failure or 4-way valve broken down in heating mode outdoor coil temp. sensor failure over-current protection failure or phase sequence fault refrigerant system pressure too high or low communication between indoor PCB and receiver panel failure...
  • Page 90 Failure code with wired controller YR-E12: Failure central Failure description Reason remote code control, type, flash wired failure code times controller Drainage system failure Float switch broken down for more than 25m continuously Indoor ambient temp. sensor sensor broken down or short circuit for failure more than 2m continuously Indoor coil temp.
  • Page 91 10.2 Trouble Shooting - Detailed for engineer Malfunction flow chart: analyze and diagnose If the air-condition fails to cooling or heating function and other functions, please check the system as follows:   1.Cooling  begining fails in cooling change the designed the enactment TEMP.
  • Page 92 2. Heating begining fails in heating change the designed the enactment TEMP. TEMP. right or not the heating load use arange is right beyond the allowable redesign the TEMP. or not arange condensate change the fault in 4-way vavle flowage failure 4-way vavle quantity of condensate superaddition condensate...
  • Page 93 3 Malfunction and Solution of Wired controller 1) There is nothing on display of wire control organ, and the air-conditioner failure to operate begining if the diode on indoor unit is lumines if there'e DC 12V if there s voltage between the four on the primary side ports:A,B,C and D which...
  • Page 94 2) The wire control organ displays the alarm signal with “E0” “E0” means the floater switch of indoor unit is abnormal  begining the alarm signal of wire control organ is E0 if the floater swith is amend the oritation of orientated correctly the floater switch if the function of the...
  • Page 95 4) The wire control organ displays the alarm signal with “E2”     “E2” means indoor piping temperature sensor is abnormal    begining the alarm signal of wire control organ is E2 amend the position if the position of piping of sensor Temp.sensor is right if the resistance of...
  • Page 96: Electrical Data

    11. Electrical Data 11.1 Wiring Diagram 11.1.1 Outdoor unit single phase outdoor wiring diagram NOTE: 1. Dashed parts is not available for only Cooling type 2. Dashed parts is optional for Low Ambient Temp. Cooling,and there is no relay in only Cooling type 3-phase outdoor wiring diagram NOTE: 1.
  • Page 97: Indoor Unit

    11.1.2 Indoor unit over 24000BTU/h convertible type wiring diagram NOTE: 1. Dashed parts are not availble in convertible type 2. Dashes part is not avaliable below Cooling capacity 42000Btu type 3. Remote central controller is optional 4. P16 and P17 are used for room card function over 24000BTU/h cassette type wiring diagram NOTE: 1.
  • Page 98 over 24000BTU/h mid ESP duct type wiring diagram Note: 1.Dashed parts are not available in duct type. 2. Dashed part is ont avaliable below Cooling capacity 28000Btu type 3.Remote central controller is optional. 4.P16 and P17 are used for room card function...
  • Page 99 High ESP duct type wiring diagram Note: 1.Dashed parts are not available in duct type 2.Dashed part is fan speed controller kit. 3.Remote central controller is optional 4.P16 and P17 are used for room card function...
  • Page 100 Cabinet unit wiring diagram: Wiring Diagram For 24000/42000BTU/h cabinet Unit PIPING ROOM TRANS. TEMP TEMP. CONTROLLER TERMINAL CN12 BLOCK CN11 DOOR SWITCH N S(N-W) FUSE T3.15A/250VAC SWING FAN MOTOR MOTOR FAN MOTOR CAP.
  • Page 101 0010451167 PCB information – circuit diagram D1-D4 100uF 零线 0.1UF/275V 0.1UF/275V 通讯线 470uF/16V 10K/0.5W P2-P6 LED3 TLP371 室内外通讯电路 7805 7812 R3 10K/0.5W 2200uF C34 104 4.7K CN23 CN22 CN10 T3.15A/250V R41 10K 1N4007 TRAN1-2 FUSE1 4148 N1 9013 室内外通讯发送 LED2 4.7K 4148 2.2K...
  • Page 102 0010451167 PCB information – characters on board(horizontal)...
  • Page 103 0010451167 characters on board(vertical)...
  • Page 104 Condition for the PCB data: 1.Working ambient temperature:-10℃~70℃, relative humidity:30%~95% 2.Preserved ambient temperature:-20℃~80℃,relative humidity:30%~95% 3.Power supply:220VAC、50/60Hz,voltage range:160V~250V 4.Precise of temperature control:±1℃ 0010451167 PCB information – port and definition P1——connect to external power supply, live line: L (220VAC) P2——connect to external power supply, neutral line: N (0VAC) P3、4、5、6——control external load, neutral line: N1、N2、N3、N4(0VAC) P7——control external load, electrical heat: HEAT (control output 220VAC) P8——control external load, health function: OXYGEN (control output 220VAC)
  • Page 105 lamp 0VDC,6. signal output of power lamp 0VDC, 7. signal output of water pump running lamp 0VDC) CN14——control external load, auto elevating function (1. signal of door switch close, 2. output of elevating direction control 0VDC, 3. output of elevating power control 0VDC, 4. power supply 12VDC) CN15——input signal, detecting water level of float switch (1-3 short circuit is normal, cut off shows that level exceeds the limitation).If float switch cuts off or occurs other failure, LED1 will flash 10 times.
  • Page 106 0010451167 PCB information – function selection(ON is 1, OFF is 0) The standard condition for PCB in factory SW1:4 bits are OFF SW2:4 bits are OFF SW3:4 bits are ON SW4:2 bits are ON SW5:4 bits are ON SW1-SW2: used for indoor unit to set unit address from 1 to 16’ SW3-SW5: used for indoor unit to select different functions.(every dip switches are corresponding to J1-J10.
  • Page 107 0010451167 PCB information- control type Control type selection between remote and wired: select by dip switch J1, SW3-1 (1 means remote control; 0means wired control). For remote control type, please use remote controller YR-H71, and a remote receiver is equipped with indoor unit.
  • Page 108 units sets: 128×16 can be controller. Address setting of central controller can be met firstly, and then modulate the address setting of slave unit wired controlled. LED in indoor PCB: 1. LED1:is the state lamp for remote receiver as well as failure lamp. If indoor unit is normal, LED1 is on, or if failure occurs, LED1 flashes regularly, and you can adjust failure type according to the flash times.
  • Page 109: Exploded Views And Parts Lists

    12 Exploded Views & Part Lists 12.1 Outdoor Units-24\28...
  • Page 110: Parts List

    Parts list the proportion of the Spare parts Spare parts description in number English Model Failure rate spare-part stock Remark Front grille 001A0100122 AU242AHBEA 0.0000% 0.0000% handle 001A1436160 AU242AHBEA 0.0000% 0.0000% 001A0100261 Front panel AU242AHBEA 0.0000% 0.0000% Axial fan 001A5402022 AU242AHBEA 0.0200% 0.0240%...
  • Page 111 Parts list Spare parts Spare parts description in the proportion of the spare-part stock number English Model Failure rate Remark 001A0100122 Front grille AU28NAHBEA 0.0000% 0.0000% 001A1436160 handle AU28NAHBEA 0.0000% 0.0000% 001A0100261 Front panel AU28NAHBEA 0.0000% 0.0000% 001A5402022 Axial fan AU28NAHBEA 0.0200% 0.0240%...
  • Page 112 Parts list Spare parts the proportion of number Spare parts description in English Model Failure rate the spare-part stock Remark 001A0100122 Front grille AU282AHBEA 0.0000% 0.0000% 001A1436160 handle AU282AHBEA 0.0000% 0.0000% 001A0100261 Front panel AU282AHBEA 0.0000% 0.0000% 001A5402022 Axial fan AU282AHBEA 0.0200% 0.0240%...
  • Page 113 Model 2: AC242ACBEA...
  • Page 114 Parts list proportion of the spare- No. Spare parts number Spare parts description in english Qty. Model Failure rate part stock Remark 001A2400087 air filter AC242ACBEA 0.00% 0.000% × 001A0100330 inlet grill assy AC242ACBEA 0.00% 0.000% × 001A1301398 fixing plate AC242ACBEA 0.00% 0.000%...
  • Page 115 Model 2: AC28NACBEA...
  • Page 116 Parts list the proportion of the Spare parts number Spare parts description in english Qty. Model Failure rate spare-part stock Remark 001A1231278 inlet grill assy AC28NACBEA 0.00% 0.000% × 001A2400108 air filter AC28NACBEA 0.00% 0.000% × 001A1101174 front panel assy AC28NACBEA 0.00% 0.000%...
  • Page 117 Model 3: AD242AMBEA AD28NAMBEA...
  • Page 118 Parts list Spare parts description in the proportion of the No. Spare parts number English Qty. Model Failure rate spare-part stock Remark 0010800086 Guard plate 1 AD242AMBEA 0.000% 0.000% 0010100228 Guard plate 2 AD242AMBEA 0.000% 0.000% 0010752516 Evaporator assembly AD242AMBEA 0.010% 0.012% 0010800106...
  • Page 119 Parts list the proportion Spare parts description in of the spare- Spare parts number English Qty. Model Failure rate part stock Remark 0010800086 Guard plate 1 AD28NAMBEA 0.000% 0.000% 0010100228 Guard plate 2 AD28NAMBEA 0.000% 0.000% 0010752957 Evaporator assembly AD28NAMBEA 0.010% 0.012% 0010800106...
  • Page 120 Model 4: AD242AHBEA and AD28NAHBEA are the same.
  • Page 121 Parts list the proportion Spare parts Spare parts description in Failure of the spare- number english Qty. Model rate part stock Remark 1 0010150130 × connection frame of inlet air AD242AHBEA 0.00% 0.000% 2 0010151123 × hanging AD242AHBEA 0.00% 0.000% 3 0010851049 ×...
  • Page 122 Cassette type -AB242ACBEA AB28NACBEA...
  • Page 123 Spare parts Spare parts description in Failure the spare-part number english Qty. Model rate stock Remark 1 001A0100708 Bottom plate assy. AB242ACBEA 0.00% 0.000% × 2 001A1301741 Swing AB242ACBEA 0.00% 0.000% × 3 001A1301743 Motor holder AB242ACBEA 0.00% 0.000%...
  • Page 124 Parts list proportion of Spare parts Spare parts description in Failure the spare- number english Qty. Model rate part stock Remark 1 001A0100708 Bottom plate assy. AB28NACBEA 0.00% 0.000% × 2 001A1301741 Swing AB28NACBEA 0.00% 0.000% × 3 001A1301743 Motor holder AB28NACBEA 0.00% 0.000%...
  • Page 126 Parts list Failure the proportion of the Spare parts number Spare parts description in english Qty. Model rate spare-part stock Remark 001A1231233 Inlet grill AP242ACBEA 0.00% 0.000% × 001A1301502 Inlet grill insert AP242ACBEA 0.00% 0.000% × 001A1231234 Front panel AP242ACBEA 0.00% 0.000% ×...
  • Page 127: Performance Curves

    13.Performance Curves 1 Cooling When air conditioner operate on cooling status, the indoor air humid ball and outdoor air dry ball which means humid degree of indoor and dry degree of outdoor unit make important mean on cooling capacity. 1) Chart of humid ball of indoor unit air modify coefficient ℃...
  • Page 128 2 Heating When air conditioner operate on heating status,the outdoor air humid ball and indoor air dry ball which means humid degree of outdoor and dry degree of indoor unit also make important mean on heating capacity. 1)Chart of humid ball of outdoor unit air modify coefficient ℃...
  • Page 129 PERFORMANCE CURVES Model: AD28NAMBEA Cool capacity graph Indoor DB( ) Outdoor DB( ) EER graph Indoor DB( ) Outdoor DB( )
  • Page 130 Heat capacity graph Indoor DB( ) Outdoor DB( ) COP graph Outdoor DB( )
  • Page 131 PERFORMANCE CURVES AC28NACBEA Cool capacity graph Indoor DB( ) Outdoor DB( ) EER graph Indoor DB( ) Outdoor DB( )
  • Page 132 PERFORMANCE CURVES AB28NACBEA Indoor DB( ) Outdoor DB( ) EER graph Indoor DB( ) Outdoor DB( )
  • Page 133: Noise Level Charts

    Noise level charts...
  • Page 134: Air Velocity Distribution

    15.AIR VELOCITY DISTRIBUTION Model: AC28NACBEA a. Cooling / Air Velocity Distribution Cooling Blowy angle:25 Air Velocity Distribution b. Cooling / Temperature Distribution Cooling Blowy angle:25 Temperature Distribution...
  • Page 135: Air Velocity Distribution

    AIR VELOCITY DISTRIBUTION Model: AB28NACBEA a. Cooling / Air Velocity Distribution Cooling Blowy angle:40 Air Velocity Distribution b. Cooling / Temperature Distribution Cooling Blowy angle:40 Temperature Distribution...
  • Page 136 AIR VELOCITY DISTRIBUTION AD28NAMBEA cooling air discharge angle 5 Air Velocity distribution cooling air discharge angle 5 Temperature distribution...