Haier MRV II Instruction Manual
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Haier MRV II Instruction Manual

Haier MRV II Instruction Manual

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Haier MRVⅡ Air Conditioning
Haier MRVⅡ can be used in a large combination
with multiple outdoor units, it is only one system
and is the second generation of Haier C-MRV
product.
Major
features
are
energy
saving,
intelligent control and precise temperature control,
for R410A system, that is more friendly for
environment as well.
To regulate the installation, commissioning and
maintenance procedure, and ensure the working
quality, also to improve the working efficiency, we
make this guide for reference.
This regulation is applicable for Haier A/C Elec.
Corp. Ltd.

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Summary of Contents for Haier MRV II

  • Page 1 Haier MRVⅡ Air Conditioning Haier MRVⅡ can be used in a large combination with multiple outdoor units, it is only one system and is the second generation of Haier C-MRV product. Major features energy saving, intelligent control and precise temperature control, for R410A system, that is more friendly for environment as well.

  • Page 2: Table Of Contents

    Index Part 1 Installation regulation------------------------------------------3 Part 2 Commissioning & Maintenance for R22 system---- 22 Part 3 Debugging & Maintenance for R410A system--------85 Part 4 Wiring diagram------------------------------------------------136 Part 1 Installation regulation 1. Installation flowchart-------------------------------------------------------4 2. Equipment delivery---------------------------------------------------------5 3. Outdoor installation--------------------------------------------------------6 4. Indoor installation----------------------------------------------------------8 5.

  • Page 3: Installation Flowchart

    Part 1 1 Installation flowchart Important points Process Confirm the selected model, 1.Engineering drawing before installation position, pipe size, layout direction Prepare the material,equipment 2. Working preparation and worker's training Confirm the person responsible 3. Working distribution for each process Confirm the model to avoid the in installation 4.

  • Page 4: Equipment Delivery

    Part 1 2 Equipment delivery 2.1 After the equipment is delivered to the site, all relative persons should join the unpacking and checking work. 2.2 Pay attention to the below points when unpacking: a. Check the equipment name, model, specification and the quantity, etc. b.

  • Page 5: Outdoor Installation

    Part 1 3 Outdoor installation 3.1 The unit should be placed far away the flammable, explosive or oily place. 3.2 The noise and the outlet air should not affect the neighbors. 3.3 There should be enough space for air inlet, air outlet and maintenance around the unit.
  • Page 6 Part 1 3.5 The bottom of steel bracket should be made from 6# channel steel. 3.6 The floor should be over 100mm higher than the ground, and there should be the drainage around to ensure the unit not being immersed in the water.

  • Page 7: Indoor Installation

    Part 1 4 Indoor installation A. With the shortest refrigerant pipe, and convenient to connect with distributing pipe and water pipe. Water pipe should keep a 1% gradient at least. B. The place for indoor unit installation should be strong enough to afford the unit weight and running shake.
  • Page 8 Part 1 4.1 Wall mounted unit installation installation figure: indoor side outdoor side mounting plate through-wall hole wall thickness through-wall hole section gas pipe liquid pipe fresh air pipe adhesive tape heat insulation 4.1.1 Fix the mounting plate, set the through-wall hole: install the unit on smooth wall beside beam and pillar.
  • Page 9 Part 1 4.2 Cassette unit installation air outlet air outlet air inlet 4.2.1 To ensure the air conditioner working effect, the installation height should be less than 3m. 4.2.2 After installation on the ceiling ,check the unit’s horizontal level ,use a gradienter to check it.
  • Page 10 Part 1 4.3.1 The indoor unit can be installed on the ceiling, which height is no more than 3m. 4.3.2 Install the unit with suspending pole, check if the installation place can bear the unit. 4.3.3 Fix the indoor unit to the suspending bolt, if necessary, it is possible to suspending the unit to the beam, etc.

  • Page 11: Piping Work

    Part 1 sending, it must connect with air sending and air return duct ,it is forbidden to blow air into working room directly, otherwise the noise level will be so high due to the high fan speed from the air outlet . 4.3.5.3 Connection between indoor unit and duct should be soft, and connect a static pressure box out of unit to avoid shaking and noise pass through the duct.
  • Page 12 Part 1 cause system block. 5.4 When welding the pipe, please blow nitrogen to prevent oxidation, pressure of nitrogen flow is about 0.02Mpa , otherwise the oxid layer on pipe inside will clog the pipe or damage the compressor. 5.5 Welding connection needs a changeable diameter pipe, the pipe inserted depth is : 10 mm : below φ19mm ;...

  • Page 13: Water Drainage Pipe Installation

    Part 1 Vertical Floor Floor Wrong Right 6 Water drainage pipe installation 6.1 Drain pipe should keep a 1% gradient at least towards water outlet direction and as short as possible, if the pipe is made of hard PVC, then set a suspender at interval of 2 meters to avoid the pipe bend.

  • Page 14: Insulation Treatment

    Part 1 connection part is negative (cassette, ceiling concealed type) ,please install a water return pipe for drain pipe. 6.6 Test the drain pipe after installation. Seal the water outlet of drain pan and charge water to 2/3 part. Check the drain pan two hours later, if there is no leakage, open the water outlet to ensure if the water drainage is fluent and if the drain pipe connection is tight.

  • Page 15: Electric Wiring

    Part 1 R22 system: R410A system: Connection wire over 20cm Adhesive tape Connection wire Adhesive tape Gas pipe Liquid pipe Gas pipe Liquid pipe Heat insulator Heat insulator 8 Electric wiring Air conditioner electric wiring should comply with the relative articles in GB5024-96.
  • Page 16 Part 1 breaker’s capacity should be 1.5 times of outdoor’s max. running current 8.7 Indoor unit of the same outdoor system should use one power supply. 8.8 The recommended power cable is BV.BVR and V V cable ,do not use YZW cable.

  • Page 17: Pipe Cleaning Work

    Part 1 9 Pipe cleaning work Blow nitrogen is one way to clean impurity from pipe Note: If you did not blow nitrogen when welding pipe , this method can not clean the oxid on the pipe wall . Connect the nitrogen with unit system via pressure relief valve, adjust the valve to 5Kg/cm , supply nitrogen to system, seal the pipe end by hand or others , when the pipe pressure getting too high to be sealed ,...

  • Page 18: Leakage Test

    Part 1 10 Leakage test Connect nitrogen tank, pressure relief gauge, gauge manifold and refrigerant system in turn, charge nitrogen to system both on high and low pressure sides at same time, notice items: 10.1 Please must test system by nitrogen , do not use any other gas. 10.2 It is better to do the leakage test before connecting with outdoor unit, because the stop valve of outdoor unit may leak due to welding or outside force, then nitrogen will go into outdoor circle system.

  • Page 19: Evacuation

    Part 1 apply the pressure again and observe for another 24 hours. 11 Evacuation Connect vacuum refrigerant system gauge manifold ,draw out the air and moisture with vacuum pump from the pipe , then make system get vacuum and dry. Important points: 11.1 Please must use vacuum pump to evacuate system, forbid to use refrigerant to pile out the air from system.

  • Page 20: Additional Refrigerant Charging

    Part 1 12 Additional Refrigerant Charging When the unit out of factory ,refrigerant charging amount is exclude the refrigerant in the pipe , so after installation the piping, additional refrigerant should be charged on site. 12.1 Connect the refrigerant tank, gauge manifold to high pressure and low pressure stop valve via flexible hose in turn, open tank valve and pile out the air in the pipe.

  • Page 21: Part 2 Commissioning & Maintenance For R22 System

    Part 1 13 Trial operation After testing leakage, evacuation charging additional refrigerant , before being electrified , please check the following items: 13.1 The capacity of indoor and outdoor without load, and the specs of circuit breaker. Check if power cable is in compliance with the provision. 13.2 If the power cable is fixed reliably, grounding resistance should not be over 4Ω...

  • Page 22: Transfer To User

    Part 1 13.8.2 Record the current , voltage, temperature and frequency after system runs for 30 minutes. 13.8.3 If the failure code displays, then analyse and maintain the problem according to relative technical data, also please record the treatment and serial number of the unit.

  • Page 23: Part 2 Commissioning And Maintenance

    Part 2 Part 2 Commissioning and Maintenance for R22 System 1. Working preparation before commissioning 1.1 Outdoor checking--------------------------------------------------------------------25 1.2 Indoor checking----------------------------------------------------------------------31 2. Cooling commissioning 2.1 Commissioning flowchart--------------------------------------------------------42 2.2 Outdoor checking--------------------------------------------------------------------43 2.3 Indoor checking----------------------------------------------------------------------47 3. Heating commissioning 3.1 Commissioning flowchart--------------------------------------------------------48 3.2 Indoor and outdoor checking ---------------------------------------------------49 4.

  • Page 24: Outdoor Checking

    Part 2 1. Working preparation before debugging 1.1 Outdoor checking 1.1.1 Refrigerant pipe length and drop height checking Allowable refrigerant pipe length and height Refrigerant pipe length(one way) Indoor unit, Max. 100m Piping length between outdoor and the first Max. 70m branch(main pipe) Piping length after the first branch Max.
  • Page 25 Part 2 SLAVE SLAVE SLAVE MASTER UNIT UNIT UNIT UNIT ≤ 75m 50 m （ if the indoor unit is higer, it is 40m) the first branch ≤ 50m lowest indoor unit/ farthest indoor unit Refrigerant piping length and height difference Items Max.piping( Total piping length...
  • Page 26 Part 2 1.1.2 Outdoor pipe connection explanation （take four outdoors in combination as an example） SLAVE SLAVE SLAVE MASTER UNIT UNIT UNIT UNIT Oil equalization Oil equalization Oil equalization pipe ∮ 9.52 pipe ∮ 9.52 pipe ∮ 9.52 Balance pipe ∮ 19.05 Balance pipe ∮...
  • Page 27 Part 2 AV28N AV30N AV32NMT AV34NMT AV36NMT AV38N AV40N Model MTAHA MTAHA MTAHA MTAHA Capacity （HP） Φ44.5 Φ44.5 Φ44.5 Φ44.5 Φ50.8 Φ50.8 Gas pipe Φ44.5(Φ2 (Φ28.58 (Φ28.58 (Φ28.58 (Φ28.58 (Φ28.58 (Φ28.58 (mm) 8.58×4) ×3) ×3) ×4) ×4) ×4) ×4) Liquid Φ22.22 Φ22.22 Φ22.22...
  • Page 28 volume Part 2 B． Additional refrigerant charging volume on site Additional charging standard of liquid pipe Liquid pipe 25.4 22.22 19.05 15.88 12.7 9.52 6.35 Dia. Additional charging volume 0.53 0.28 0.12 0.06 0.03 per meter （kg/m） Calculating method of additional refrigerant charging volume ●...
  • Page 29 Part 2 1.1.4.2 Max. refrigerant charging volume of system Capacity 8HP/10HP 16/18/20HP 24/26/28/30HP 32/34/36/38/40HP Volume（KG) Remark: Max. refrigerant charging volume of system is standard refrigerant charging amount when out of factory plus additional refrigerant charging amount on site of all the units in whole system 1.1.5 Unit No.
  • Page 30 Part 2 layer of all indoors and outdoors should be connected together, and be grounded on outdoor at single point, and be grounded on outdoor at single point. 1.2 Indoor checking 1.2.1 Indoor unit pipe size checking Model 22~45 56~90 112~140 Gas pipe (mm) Φ12.7...
  • Page 31 Part 2 1.2.3 Select control mode Wired Indoor control Wired control Remote Remark master slave unit control unit CN23 Short Disconnectio 1,Communicatio connectio connectio addresses n （ Set between wired when out control master of factory） unite and wired control slave CN30 Short...
  • Page 32 Part 2 1.2.4 Set indoor communication address, central control address and slave unit address(model, No., position) ,and fill all these information in the “additional refrigerant charging list” on front plate of the master unit. 1.2.4.1 Setting method of communication address between indoor and outdoor Setting Setting method...
  • Page 33 1. “1” of SW03 at “ON” (up) 2. press “filter reset” button for 5 seconds then enter system address setting mode, choose indoor address by press ”TEMP＋ /－” button. 3. Temp. display area displays: system unit No. address＋XX, then press ”TEMP＋/－” setting by button, the unit No.
  • Page 34 0 0 1 0 0 0 1 0 1 0 0 0 0 0 1 0 0 1 1 0 1 0 0 1 0 0 1 0 1 0 1 0 1 0 1 0 0 0 1 0 1 1 1 0 1 0 1 1 0 0 1 1 0 0 1 0 1 1 0 0...
  • Page 35 Part 2 Unit No. setting by hand (dip switch position of SW03 is in correspondence with the marks on PCB) Indoor SW03 addres SW03 Indoor address 1 2 3 - 36 -...
  • Page 36 1.2.4.2 Indoor central control address setting (necessary for the system with central control or BMS control) setting setting method remark mode central “1” of SW02 on indoor PCB at controller “ON” (up) set on address details about address and site setting dipswitch position please refer by hand...
  • Page 37 Part 2 Central controller address setting table centr centra SW02 SW02 contr contro oller ller addre addre - 38 -...
  • Page 38 Central controller address setting table SW02 centr SW02 centra contr contro oller ller addre addre Part 2 - 39 -...
  • Page 39 1.2.4.3Inspection flowchart before commissioning 1.2.4.3.1 Outdoor check if the piping and branch if they are not accordant, pipe is installed properly please change according to the use manual confirm additional according to the recharging refrigerant amount refrigerant standard chart 8HP,10HP: confirm gas/liquid more than 10HP: confirm gas/ confirm stop valve state stop valve are open, oil/ pressure...
  • Page 40 1.2.4.3.2 Indoor choose indoor controller wired control type remote control type wired controlled master unit: pull out the short connection wire set state when out of factory CN23,CN3,SW08-[6] at "OFF", (CN23 、 CN30 short connected, CN21 to remote reciever SW08-[6] at "ON"; SW01 at "0"), terminal block A,B,C to wired controller wired controlled slave unit: pull out...
  • Page 41 if yes Confirm indoor address, if the unit quantity displayed on master unit SW3 SW4 SW5 and actual quantity are accordant Indoor address setting Set address manually set address automatically Check indoor communication Check indoor unit controller which by digital tube of master unit, display the repeated address one by (confirm the set unit No.

  • Page 42: Cooling Commissioning

    2. Cooling commissioning 2.1 Commissioning flowchart if the master unit can not find all the indoor, it can not start to run, electrify outdoor 12 hours in advance before trial operation, all indoors confirm outdoor unit confirm indoor unit startup and run in cooling mode with high fan speed, set temperature at 16 degrees if slave unit can start normally, for the first check if there is air flow out from...
  • Page 43 Parts Items Estimation standard SV1： 1. 6A unloading valve,3-core, red（discharging from high pressure side of oil segregator to low pressure side of gas segregator） ，after system being electrified, pipe become hot, under the situation that unloading valve be close for long time, check the temp.
  • Page 44 No. Parts Items Estimation standard SV4: 4-core, yellow (from discharging pipe to the top of compressor); SV5: 2A, 4-core, yellow ( from the top of compressor to air suction pipe） ； when SV4 open and SV5 close, compressor runs with full load, when SV4 close SV5 open, compressor runs with half load, If there is wrong current of full load running is over than...
  • Page 45 1. Connect the pressure gauge at low in heating mode, the pressure checking joint of slave unit. one-way valve which low pressure of slave unit should be one-way paralleled with outdoor the same with master unit basically valve EEV leaks, so plenty of 2.
  • Page 46 No. Parts Items Estimation standard high the high pressure during compressor running, temp. after pressure capillary form oil oil return capillary is rather high oil return segregator is (higher than ambient temp.) capillary blocked by weld Spraying and oil return capillary from spraying open SV3 to check if the capillary temp.

  • Page 47: Indoor Checking

    2.3 Indoor checking No. Parts Items Estimation standard If the EEV has no Electronic When all indoor in cooling mode, EEV all response, or can not expansio open to 480 or close to min, check the close fully, can not n valve dip switch if SW08-7 is “off”...

  • Page 48: Heating Commissioning

    3. Heating commissioning 3.1 Commissioning flowchart if the master unit can not find all the indoor units, it can not start to run, electrify outdoor unit 12 hours in advance before trial operation, set temperature at 16 ℃ , when debugging in heating mode, outside environment temperature should lower than 21 ℃...

  • Page 49: Indoor Trouble Diagnose And Trouble Shooting

    commissioning) 4 Familiar trouble during commissioning and shooting method 4.1 Indoor trouble diagnose and trouble shooting remark (trouble trouble trouble trouble diagnose exhibition diagnose shooting method) indoor gas observe pipe TC1 changing trend （three core, check indoor green）, liquid sensor TC1/TC2/EEV pipe TC2 position,...
  • Page 50 trouble trouble trouble remark (trouble diagnose exhibition diagnose shooting method) refer observe indoor TC1/TC2/EEV by dipswitch, standard, indoor TC1 is much higher than calculate does not TC2, EEV is displayed open system cool, or fully, when unit startup, voice lack of amount cooling of refrigerant flow can be...
  • Page 51 exhibition shooting diagnose method) change the units pipe is too long , according height of the use between indoor manual, or units is more than standard electric heater high/low pressure Outdoor 4-way are too low, and outdoor valve change can not rise even does not 4-way supply refrigerant,...
  • Page 52 exhibition diagnose shooting (trouble diagnose method) wired two switches of dial SW01-1 two switches of controller SW01 master SW01 on wired control wired wired controller indoor, wired controller at controller to “OFF” controller “ON” “OFF” shows 8888 wired circularly controller or change recover damaged...

  • Page 53: Outdoor Trouble Diagnose And Trouble Shooting

    4.2 Outdoor trouble diagnose and trouble shooting trouble trouble trouble analysis exhibition shooting check if the power voltage is 380V±10% normal, low power voltage will （342V～ cause big current 418V） power module is damaged, change power then three phase output is not in balance and power module module alarm...

  • Page 54: Problems During Installation

    4.3Problems during installation trouble analysis trouble shooting the sensor is damaged when gas pipe sensor should be welding, or the sensor is pulled pulled off during welding, off and not be reposition and reset it after welding insulation layer is too thin, it Dew occurs on connection pipe should thicker than 15 mm calculate the liquid pipe...
  • Page 55 trouble analysis trouble shooting wired controller controls one wired controller only multiple indoor units, but these indoors are not in one system, so can control indoors in some of indoors in one system one system do not run for indoor installation, dimension checking hole is too small or too position of checking hole...

  • Page 56: Diagnose Method For Damaged Main Parts

    4.4 Diagnosing method for damaged main parts 4.4.1 Pressure sensor high pressure sensor 0～3.33Mpa，output 0.5～3.9V, low pressure sensor 0～0.98Mpa, output 0.5～3.5V. Output voltage and pressure are linear relationship. A . High pressure Pd is abnormal: check if there is +5V voltage between 1 and 2 pins of CN26 with multimeter, if no please check if the PCB +5V power supply (if CMOS chip 7805 is normal) is damaged, if yes please check if the voltage between 4 and 2 pins is within the output...
  • Page 57 refrigerant in the system firstly. 4.4.2 IPM power module (the same with rectifier) A. Remove compressor cable, capacity cable from power module, dial multimeter to “diode”, connect the red terminal (positive) to P of power module, and connect the black terminal (negative) to U, V and W in turns, check if the resistors are infinite;...

  • Page 58: Attached Tables

    5 Attached table 5.1 Table 1: Additional refrigerant charging list Additional refrigerant charging list quantity of indoor unit: indoor indoor indoor indoor indoor indoor address No. model position address No. model position pipe length and refrigerant recharging amount liquid pipe additional refrigerant liquid pipe additional refrigerant...
  • Page 59 5.2 Table 2: Relative settings 5.2.1 Communication address between indoor and outdoor setting method Setting Setting method Remark mode setting 1. Dip switch SW02 and SW03 state Unit No. on indoor PCB are all at “off” setting when (down), that also is the setting automatically out of state when out of factory.
  • Page 60 5.2.2 Indoor central control address setting (necessary for the system with central control or BMS control) setting setting method remark mode central 1. “1” of SW02 on indoor PCB at controller “ON” (up) setting address 2. details about address and on site setting by dipswitch...
  • Page 61 5.3 Table 3: Setting state and function definition of PCB and wired controller when out of factory Setting Items Function state 1. When one wired controller controls one indoor, or several wired controller control one indoor, or with remote controller, do not change this switch. dial to 0 2.
  • Page 62 Settin Items Function state LED3 is used together with LED4, if the communication between indoor and outdoor is normal, LED3 and LED4 will flash regularly, flash frequency of red led is lower than green led troubl it will not light in normal situation, according of indicat the flash times you can diagnose the failure or led...
  • Page 63 0010451181A（CN10 terminal of EEV 6-core red） state when state when dip switch jumper out of functions out of factory factory 0: fix air volume SW06-1 connected 1: commonly control temp. difference selection in AUTO mode SW06-2 connected 0: Tdif = 2 1: Tdif = 3 0：...
  • Page 64 Part 2 0010451181A（CN10 terminal of EEV 6-core red） connected change running mode that displayed on wired controller SW07-7 (J8)0(J9)0: AUTO/HEAT/ DEHUMIDIFY /COOL/SWING connected (J8)0(J9)1: Auxiliary heat / HEAT /DEHUMIDIFY /COOL/SWING (J8)1(J9)0: DEHUMIDIFY SW07-8 /COOL/SWING (J8)1(J9)0: HEAT /DEHUMIDIFY /COOL/SWING connected 0:when unit stops, oil return, in low SW08-1 speed 1: fan stops...
  • Page 65 5.4 Table 4: system running data display –digital tube of master unit data display 5.4.1 System installation data display and function operation method content displaye function function operation d on definition method digital tube refrigerant means R22 type quantity outdoor means 3 slave units, no connected master unit...

  • Page 66: Definition

    content function function operation displayed definition method on digital tube ●SW8-8 on left side -– that mean slave unit outdoor display the running fully while runs setting master unit is running manually frequency ●SW8-7 on left side – with fix of master that means slave unit frequency...
  • Page 67 5.4.2 Indoor unit running data display content function displayed on remark definition digital tube “1111” means indoor display the indoor has communicati 0/1/ 0～ 1.dial SW03 or has not to 0, it shows communicat “----“ means running data communicati of indoor from No.1 to No.16 display such as “1”, if...
  • Page 68 5.4.3 Outdoor running data display function content displayed on definition digital tube display failure such as “20”, if no failure 0/1/ code of the it will shows “0” outdoor display running “HHHH” means heating 0/1/ mode of the “CCCC” means cooling outdoor display capacity of such as “10”...
  • Page 69 content displayed on function definition digital tube the slave unit LED1 display “1” means capacity valve SV4 open, ”0” means close state the slave unit LED2 display “1” means 1/2/3 capacity valve SV5 open, ”0” means close state the slave unit LED3 display “1”...
  • Page 70 5.5Table 5: Failure code list 5.5.1 Outdoor failure code list digital tube indication indication on wired failure code failure description controller definition master (hex) unit master unit sensor temp. is below defrosting -60.87 ( open circuit ) or temp. sensor over 135.4 (short circuit) Te failure for 1 minute...
  • Page 71 Part 2 digital indication tube indication on wired failure code failure description controller definition master (hex) unit high pressure over master unit high 4.9V, or below 0.1V pressure for 30 seconds, resume sensor manually then turn to failure backup running high pressure over...
  • Page 72 digital indication tube on wired indication failure code definition failure description controller master (hex) unit inner thermal inner thermal protector protector of master circuit of master unit unit compressor compressor failure acts after compressor wrong wiring for master startup minutes, unit high/low pressure lower than Ps for 1 sensor Pd,Ps...
  • Page 73 digital indication tube on wired failure code indication failure description controller definition on master (hex) unit operation, master unit oil compressor oil temp. is temp. below (Ps＋10)ºC for 5 minutes, resumable in operation, slave unit slave unit communication missing abnormal, or slave unit operation is powered off failure...
  • Page 74 Part 2 digital tube indication indication on wired failure code failure description controller definition master (hex) unit sensor is below -60.87 the slave unit oil (open circuit) or over 77(7) temp. sensor 135.4 (short circuit) Toil failure for 1 minute EEPROM faulty the slave unit...
  • Page 75 Part 2 5.5.2 Indoor failure code list flash times of flash times of health LED indication LED5 on indoor on wall PCB/timer LED failure code definition on wired mounted unit controller on remote remote receiver receiver —— indoor ambient sensor Ta failure ——...
  • Page 76 Part 2 flash times of flash times of health LED indication LED5 on indoor on wall on wired PCB/timer LED failure code definition mounted unit controller on remote remote receiver receiver —— indoor central control address repeated —— wall mounted unit connecting board...
  • Page 77 5.6 Table MRV trial operation data tracking list master unit slave unit 1 slave unit 2 slave unit 3 TOIL...
  • Page 78 MRV trial operation data tracking list indoor running data indoo indoor indoor indoor unit capacit unit capac unit capaci unit capaci V TA V TA V TA V TA 1 TC2...
  • Page 79 MRV trial operation data analysis 5.7.1 MRV trial operation data analysis (cooling fully) master unit slave unit 1 slave unit 2 15.88 4.19 TOIL 2000/2000 2000 2000 10.5 100% 100%...

  • Page 80: Part

    Part 2 data analysis problem diagnose open angle of EEV on stop indoor shows 4 (close fully), normally the coil temp. should close to indoor one EEV ambient temp. ( TA±3 ); this indoor two coil temp. is can not be much lower than ambient temp., that is EEV does closed fully not closed fully and cause liquid return----to find the...
  • Page 81 .7.2 MRV single unit running data analysis (cooling mode) TOIL...
  • Page 82 Data analysis problems diagnose remark open angle of EEV on stop indoor diagnose shows 4 (close fully), normally the coil should one EEV temp. should be close to indoor ambient done after oil can not temp. （TA±3）, this indoor coil temp. is is return and be closed much lower than ambient temp., that...
  • Page 83 5.7.3 MRV running data analysis(all in heating mode) master unit slave unit 2 slave unit 3 19.68 3.35 TOIL 1248 1800 1360 21.5 11.4 11.0 100% 100% 1．7 0．8...

  • Page 84: Part 3 Debugging & Maintenance For R410A System

    Data analysis problems diagnose liquid pipe (TC2) temp. is low,TC2 ＜ TA+10； gas pipe (TC1) temp. is low indoors can not because the EEV can not open, so the open refrigerant does not flow, then the coil temp. is close to ambient temp. sensors in heating mode the indoor TC1＞TC2, but indoors...
  • Page 85 Part 3 Part 3 Commissioning and Maintenance for R410A System 1.Working preparation before commissioning 1.1 Outdoor checking-------------------------------------86 1.2 Indoor checking---------------------------------------92 1.3 Relative settings--------------------------------------93 1.4 Indoor parameters------------------------------------98 1.5 outdoor parameters----------------------------------99 2.Trial operation and the performance 2.1 Trial operation sequence------------------------100 2.2 Inspection before trial operation--------------101 2.3 State setting of trial operation-----------------103 2.4 Trial operation---------------------------------------104 3 Failure code...

  • Page 86: Working Preparation Before Commissioning

    Part 3 1.Working preparation before commissioning 1.1 Outdoor checking 1.1.1 Refrigerant pipe length and drop height checking Allowable refrigerant pipe length and height Refrigerant pipe total length(one way) 300m Refrigerant pipe max. length(one way) 150m Piping length between outdoor and the first Max.
  • Page 87 Part 3 outdoor1 outdoor 3 outdoor2 1st gather pipe 2st gather pipe L1+L3 ＜ 10m, L2+L3 ＜ 10m Gas/liquid pipe: Oil equalization pipe: L5+L6 ＜ 10m h ＜ 5m ght difference between outdoors: Note: a. HZG-30/A includes HZG-20/A; b. The connection pipe among outdoors can not be higher than the stop valve position;...

  • Page 88: Pipe Length

    Part 3 when the distance between outdoors is outdoor over 2m, the oil trap must be set (upright projecting pipe, 200mm high) outdoor outdoor below 2m below 2m over 200mm over 200mm L1 ＜ 10m L2+L3 ＜ 10m L7+L14+L13 ＜ 40m Max.
  • Page 89 Part 3 1.1.3 Outdoor pipe size checking AV08NM AV10NM AV12NM AV14NM AV16NM AV18NM AV20NM Model VERAA VERAA VERA VERA VERA VERA VERA Capacity （HP） Φ19.05 Φ22.22 Φ25.4 Φ25.4 Φ28.58 Φ28.58 Φ28.58 pipe(mm) Liquid pipe Φ9.52 Φ9.52 Φ12.7 Φ12.7 Φ12. 7 Φ15.88 Φ15.88 (mm)
  • Page 90 Part 3 AV36NM AV38NM AV40NM AV42NM AV44NM AV46NM AV48NM Model VERA VERA VERA VERA VERA VERA VERA Capacity （HP） Φ38.1 Φ38.1 Φ38.1 Φ38.1 Φ38.1 Φ38.1 Φ38.1 pipe(mm) Liquid pipe Φ19.05 Φ19.05 Φ19.05 Φ19.05 Φ19.05 Φ19.05 Φ19.05 (mm) equalizati Φ9.52 Φ9.52 Φ9.52 Φ9.52 Φ9.52...
  • Page 91 Part 3 B． Additional refrigerant charging volume on site Additional charging standard of liquid pipe Liquid ￠ ￠ ￠ ￠ ￠ ￠ pipe Dia. 22.22 19.05 15.88 12.7 9.52 6.35 Additional charging 0 . 3 5 0 . 2 5 0.17 0.11 0.054...

  • Page 92: Indoor Checking

    Part 3 1.2 Indoor checking 1.2.1 Indoor unit pipe size checking Model 22~28 36~56 71~140 Gas pipe (mm) Φ9.52 Φ12.7 Φ15.88 Liquid pipe(mm) Φ6.35 Φ6.35 Φ9.52 Remark: the above table does not include wall mounted indoor 1.2.2 Power signal wire confirmation: Indoor units of one system use one power supply, The signal wire shielded layer of all indoor and outdoor units should be connected together, and be grounded on outdoor at single point.
  • Page 93 factory. Part 3 B. The indoor controlled by master/slave wired controller and the indoor controlled by individual wired controller are all wired controlled master indoor. C. The remote receiver is equipped with a wire which can be inserted in CN21. 1.3 Relative settings 1.3.1 Setting method in central control 1) Indoor central control address setting method:...
  • Page 94 and cancel the communication with wired controller, the detailed Part 3 method is as follows: Set the jumper J19 on indoor PCB: function connected wired control disconnected remote contr ol CN30 on indoor PCB: CN30 function connected wired control disconnected remote contr ol Note: if making central control for more than one indoor, please must connect the wired controller.

  • Page 95: Dip Switch Setting

    indoor master unit, and among indoor slave units. Part 3 3) Pull out the jumper of CN23 on the indoor slave unit PCB 1.3.3 Dip switch setting "1" shows dip switch is ON or jumper is short connected; "0" shows dip switch is OFF or jumper is disconnected.
  • Page 96 Part 3 B. Indoor address setting when in central control by central controller: SW02 (only on the master unit). SW02 description central control address=1 central control address=2 ---- ---- central control address=127 central control address=128 set central control address by wired controller Forbidden to set address by wired controller C.
  • Page 97 Part 3 1.3.4 Dip switch setting of wired controller selection item function description state set as simple controller changeover of controller type set as standard controller use room temp. sensor on wired controller selection of room temp. sensor not use room temp. sensor on wired controller without auto restart auto restart with auto restart...

  • Page 98: Indoor Parameters

    Part 3 1.3.5 Dip switch on inverter board cannot run without load, set when out of factory inspection of operation SW1-1 without load can run without load set as OFF when out of factory SW1-2 pre-set SW1-3 pre-set set as OFF when out of factory communication failure alarm, set when out of factory SW1-4...

  • Page 99: Outdoor Parameters

    Part 3 1.5 Outdoor parameters description SW10 SW11 function unit No. display outdoor failure code failure code of outdoor bus data transmission display outdoor No. priority pre-set display running mode H H H H: heat C C C C: cool outdoor capacity 10.0 shows 10HP outdoor total running...

  • Page 100: Trial Operation And The Performance

    Part 3 description SW10 SW11 function unit No. Pd pressure unit: KG Ps pressure unit: KG TD inverter discharging temp. LED1, LED2, LED3 will display TS inverter suction temp. LED1, LED2, LED3 will display LED1, LED2, LED3 will display TE inverter defrosting temp. unit No.

  • Page 101: Inspection Before Trial Operation

    Part 3 2.2 Inspection before trial operation Before inspection, confirm the state of indoor and outdoor to avoid the trial failure because of the incorrect installation. 2.2.1 Indoor unit confirmation inspection items results If indoor unit is in good condition, and if the electric box position is in accordance with the state when out of factory, also if it is fixed firmly.
  • Page 102 Part 3 2.2.3 Wiring confirmation inspection items results If outdoor power cable is fixed at correct position. And if the power cable is in compliance with the requirement. If indoor power cable is fixed at correct position. And if the power cable is in compliance with the requirement.

  • Page 103: State Setting Of Trial Operation

    Part 3 Note: Check if outdoor stop valve has been open fully. When there is only master unit, please confirm if the oil pipe stop valve has been close fully. 2.3 State setting of trial operation Confirm being electrified Indoor and outdoor are electrified respectively and then check as the following table: inspection items results...

  • Page 104: Trial Operation

    Part 3 2.4 Trial operation Generally, confirm all the indoors one by one. Please set the other indoors at STOP state 2.4.1 Main power supply and preliminary confirmation if RUN LED on wired ※1 controller is light if STANDBY on wired controller ※2 is light if the failure code is displayed...
  • Page 105 Part 3 2.4.3 Cooling operation confirmation start once outdoor stops, re-start set the mode as COOL: press the button up the unit 2 and a half for over 5 seconds at OFF state minutes later confirm the running state of if blowi ng out cold air the compressor, indoor EEV if the ven tilation is good...
  • Page 106 Part 3 2.4.4 Heating operation confirmation start once outdoor stops, re-start set the mode as HEAT: press the button up the unit 2 and a half for over 5 seconds at OFF state minutes later confirm the running sta te of if blowing out hot air the compressor, indoor EEV if the ventilation is good...
  • Page 107 Part 3 2.4.5 Outdoor confirmation (cooling) outdoo r rated operation in cooling mode outdoor confirmation in master unit in operation cooling mode at 10 seconds' interval outdoor confirmation in No.1 slave unit in operation cooling mode at 10 seconds' interval outdoor confirmation in No.2 slave unit in operation cooling mode...
  • Page 108 Part 3 2.4.6 Outdoor confirmation (heating) - 108 -...
  • Page 109 Part 3 ※ 1 check indoor power cable if voltage among if volt age between L if volt age between A A, B, C on wired and N on indoor and B on indoor if indoor fuse is normal controller is AC terminal block is AC terminal block is AC 220V...
  • Page 110 Part 3 ※ 3 if voltage among 1. indoor PCB abnormal if voltage between if the other indoors B, C on wired 2. wiring of indoor PCB B and C on indoor if fan motor runs begin to run controller is AC is damaged or the port terminal block is is not insert ed well...
  • Page 111 Part 3 Note 1): Temp. difference between air inlet and air outlet Standard A. In cooling mode, after running for at least 30 minutes, it is normal that the temp. difference between air inlet and air outlet is over 10 , (at max.
  • Page 112 Part 3 Note 3): Running pressure standard indoor 18~32 ℃ high pressure 2.0~3.5MPa cooling (at max. frequenc y) outdoor 25~35 ℃ low pressure 0.6~1.0MPa high pressure 2.2~2.8MPa heating indoor 15~25 ℃ (at max. frequency) low pressure 0.3~0.8MPa outdoor 5~10 ℃ The above value is measured after running for 15 minutes (ambient temp.

  • Page 113: Failure Code

    Part 3 3 Failure code 3.1 Inverter master outdoor failure code list digital indication tube on wired indication controller on master failure code definition failure description (hex) unit the sensor voltage is below 0.1V (open circuit) or over master unit defrosting temp. 4.8V (short circuit) for 1 minute, not alarm in defrosting sensor Te failure and within 3 minutes after defrosting.
  • Page 114 Part 3 digital indication tube on wired indication controller on master failure code definition failure description (hex) unit EEPROM faulty, or being inserted conversely, with incorrect EEPROM failure of master unit part main chip 849 Td sensor is over 120℃ for 10 seconds, unit stops and master unit discharging temp.
  • Page 115 Part 3 digital indication tube on wired indication controller on master failure code definition failure description (hex) unit before startup, detect if the sensor is in short circuit or in radiator sensor failure open circuit. 2 minutes and 50 seconds later after unit stops, resume.

  • Page 116: Indoor Failure Code List

    Part 3 digital indication tube on wired indication controller on master failure code definition failure description (hex) unit DC fan motor driving board in communication the code byte is 0*40. 2 minutes and 50 over current or curent seconds later after unit stops, resume.If it occurs 3 times transducer broken down in an hour, confirm the alarm.

  • Page 117: Trouble Diagnose And Trouble Shooting

    Part 3 4.Trouble diagnose and trouble shooting [46]communication between master unit connecting board and inverter board failure if connecting board check master unit connecting board sends serial signal to inverter board/slave unit PCB if connecting board receives contineous signal from inverter board/slave unit PCB check master unit inverter board/slave unit PCB check power source interference...
  • Page 118 Part 3 [01/02/03/04/20/21/22/23/24] sensor circuit reconnect if sensor terminal is fixed well if sensor resistor replace sensor /characteristic is proper check if PCB is faulty, if yes, replace it [05/33] EEPROM failure if the chip is fixed well reconnect replace it if the chip is damaged check if PCB is faulty, if yes, replace it...
  • Page 119 Part 3 [74] compressor overcurrent protection if slave unit voltage is proper improve the power source circuit eliminate the abnormal reasons if there is abnormal overload if detection circuit of rectify the wiring current tranducer is proper if the slave outdoor PCB is faulty, replace it - 119 -...
  • Page 120 Part 3 [30] high pressure switch circuit if high pressure switch acts if high pressure switch check and replace if faulty is normal if the wi ring is normal check and rewiring if faulty if service valve opens fully if stop valve opens if in cooling outdoor fan motor runs normally if the connector,...
  • Page 121 Part 3 [30/31] high/low pressure switch circuit if in heating indoor fan motor is normal if the connector, modify capacitor,fan motor are normal if indoor EEV is normal if the connector, modify the coil are normal if heat exchanger /filter are clogged or the eliminate the abnormal reasons air flow is in short circuit if the valve body is...
  • Page 122 Part 3 [38/40] high pressure protection (Pd sensor) if characteristic of modify high pressure sensors are normal if stop va lve opens fully stop va lve opens fully if in cooling outdoor fan motor runs normally if the connector, modify capacitor,fan motor are normal if heat exchanger...
  • Page 123 Part 3 [44/06]communication circuit between indoor and outdoor if wiri ng between P and modify the communication wire Q is wr ong or broken down if the port of CN15 on modify the port indoor PCB is normal if the port of CN19 on outdoor connecting board is normal electrify the outdoor if outdoor power source is normal...
  • Page 124 Part 3 [09]indoor address repeated if wiring between P and modify the wiring Q is normal if communication wire is modify the communication wire connected with multi outdoors if indoor QTY conn ected with outdoor is normal check o utdoor connecting board, if faulty, replace it [61]master unit IPM (power module) alarms if the fan connected with CN5...
  • Page 125 Part 3 [07]communication abnormal between indoor and wired controller if wiring o f terminal A, B, C of modify the wiring wired controller is proper if there is broken wire or port is modify the connection fixed improperly if in group operation set one indoor if there is indoor unit unit as No .
  • Page 126 Part 3 [34] discharging temp. (TD) protection acts if outdoor gas/liquid stop open all stop valves valves open fully if outdoor EEV is modify outdoor EEV normal(the connector, wires, coil, valve body, outdoor PCB) if TD sensor replace TD sensor resistor/characteristic are normal if wire spec is right match the right wire...
  • Page 127 Part 3 [39/31] low pressure protection acts if connector, capacitor if in cooling indoor modify and fan motor o f in door are fan motor runs normally normal if indoor heat exchanger check indoor PCB, or filter is clogged if faulty, replace it clean if the low pressure replace low pressure sensor...
  • Page 128 Part 3 [39] low pressure sensor Ps circuit if LED2 is on modify connector and wires if the low pressure replace low pressure sensor sensor characteristic is normal compressor damage or 4-way valve bad reversing will cause in running (10 minutes the refriegrant flows from later after startup) if Ps is over discharging pipe to suction pipe...
  • Page 129 Part 3 [36] oil temp. too low before startup, if outdoor start up outdoor after being electrified has been electrified for over for over 6 hours 6 hours when indoor is electrified individually, in running, if some indoors switch off the unit by controller after are powered off suddenly and not be switched being electrified off normally (EEV not close well)
  • Page 130 Part 3 [46] communication abnormal with inverter board 1. if inverter board is electrified, if not, if LED2 is on check if the power cable is fixed well. 2. if the pa rts of inverter board are bro ken down, if yes, change the board. if the communication wire with replace the wire the main board is broken down...
  • Page 131 Part 3 [47] radiator temp. abnormal if radiator temp. rep lace radiator sensor is normal temp. sensor when compressor or fan check if main board is motor is running, if radiator replace main board broken down control port SV3 has output if radiator fan motor repair the bad terminal terminal is fixed firmly...
  • Page 132 Part 3 [63] incorrect wiring solve as ACCT current check as ACCT is abnormal transducer is abnormal check if U, V, W is make some improvement lack of phase [50] voltage too high check if voltage of improve the power power supply is normal supply su rroundings check if wiring of...
  • Page 133 Part 3 [53] ACCT current transducer abnormal check if wiring of current transducer is re-wiring connected well check if arrow direction of ACCT is change the direction to rectifier port check if compresso r and the tran sducer change corresponding parts are lack of pha se [65] DCCT current transducer abnormal check if wiring of...
  • Page 134 Part 3 [58] IPM alarms check if gate circuit re-fix board is fixed well check if power module is damaged change corresponding parts eliminate the failure as "ACCT over current protection" and "radiator temp. abnormal" [68] fan motor IPM alarms check if power module is damaged change corresponding parts...

  • Page 135: Part 4 Wiring Diagram

    Part 3 [54] voltage too low check if power supply improve the power voltage is normal supply surroundings check if CNVDC make improvement wiring is normal check if AC check the corresponding circuit contactor acts check if wiring of electrolytic capacitor re-wiring and reactor is normal [73] fan motor detecting out of control...
  • Page 136 Part 3 [60] logic abnormal check if there is improve the power interference around supply surroundings the electric box check if DCCT, make improvement ACCT is no rmal if VDC is normal check AC contactor circu it if voltage of IPM- replace inverter board FO is normal - 136 -...
  • Page 137 Part 4 Part 4 Wiring diagram 1. Wiring diagram of outdoor unit 1.1 R410A system-------------------------------------------------------------138 1.2 R22 system-----------------------------------------------------------------139 2. Wiring diagram of indoor unit 2.1 High static pressure duct unit---------------------------------------141 2.2 Med static pressure duct unit----------------------------------------142 2.3 Low static pressure duct unit----------------------------------------143 2.4 Cassette unit AB09-16--------------------------------------------------144 2.5 Cassette unit AB18-48--------------------------------------------------145 2.6 Wall mounted unit--------------------------------------------------------146...

  • Page 138: Wiring Diagram Of Outdoor Unit

    Part 4 1. Wiring diagram of Outdoor unit 1.1 R410A system CN42 PTCN 6 5 4 3 2 1 CN41 CN40 W PTCL COMP CN46 B_SERIAL STOP LD2 LD3 START DOWN radiator fan CN39 W fan motor MODULE-COM driving board SW10 SW11 gate circuit board CNDC2...

  • Page 139: R22 System

    1.2 R22 system 1.2.1 Master unit: AU96NMTAHA, AU78NMTAHA low pressure high pressure inner thermal 0010524242 switch switch protector fan motor current detector power module 4-way valve filter CONNECTING PCB compressor spray valve capacitor LD1 LD2 unloading valve fuse equalization SW3 SW4 valve 250 VACT3.15A crankcase...

  • Page 140: Wiring Diagram Of Indoor Unit

    Part 4 2. Wiring diagram of indoor unit 2.1 High static pressure duct unit 0010525047 WIRING DIAGRAM OF INDOOR UNIT Symbol Description - 140 - Fan Motor Running Capacitor Transformer Ambient Temperature Sensor Gas Pipe Temperature Sensor CN13 Malfunction Code indication by Wired Remote Controller CN14 CN16 The Flash Times...

  • Page 141: Med Static Pressure Duct Unit

    Part 4 2.2 Med static pressure duct unit WIRING DIAGRAM OF INDOOR UNIT 0010578437 S mbol Description Malfunction Code indication by Wired Remote Controller Fan Motor The Flash Times Malfunction of LED5 on the Malfunction Contents Running Capacitor Code the PCB/Timing Transformer LED on the Wireless Receiver...
  • Page 142 Part 4 2.3 Ceiling concealed duct unit 0010578433 WIRING DIAGRAM OF INDOOR UNIT Dip Sw ch Function Symbol Description Dip Switch (8P) Wired controller address and indoor unit capacity setting SW01 Fan Motor Dip Switch (8P) Transmission address setting between I.D and centrol controller SW02 Running Capacitor Transmission address setting...

  • Page 143: Cassette Unit Ab09-16

    Part 4 2.4 Cassette unit AB09-16 0010578434 CIRCUIT DIAGRAM OF INDOOR UNIT(AB09-16) Description Malfunction Code indication by Wired Remote Controller Fan Motor The Flash Times Malfunction Malfunction Contents of LED5 on the Running Capacitor Code the PCB/Timing Transformer CN8 W LED on the FAN-01 CN35...

  • Page 144: Cassette Unit Ab18-48

    Part 4 2.5 Cassette unit AB18-48 0010578436 WIRING DIAGRAM OF INDOOR UNIT(AB18-48) Sy bol Malfunction Code indication by Wired Remote Controller Description P/G Motor The Flash Times of Malfunction LED5 on the PCB/ Malfunction contents Running Capacitor Timing LED on the Code Wireless Receiver Transformer...

  • Page 145: Wall Mounted Unit

    Part 4 2.6 Wall mounted unit 0010578435 WIRING DIAGRAM OF INDOOR UNIT Sym l Description Malfunction Code indication by Wired Remote Controller Fan Motor The Flash Times Malfunction Malfunction Contents of LED5 on the Running Capacitor Code the PCB/Timing Transformer TR1, LED on the Wireless Receiver...

  • Page 146: Convertible Unit

    Part 4 2.7 Convertible unit WIRING DIAGRAM OF INDOOR UNIT 0010526531 Malfunction Code indication by Wired Remote Controller *Master/Slave Wired Remote controller and Wireless Remote Setting The Flash Times Malfunction of LED5 on the Malfunction Contents At the time of installation or after service inspection/repair Code the PCB/Timing LED on the...
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