TECHNICAL MANUAL 2013 CONSOLE MULTI DC INVERTER

Transcription

1 TECHNICAL MANUAL 2013 CONSOLE MULTI DC INVERTER MODELS Indoor units BCODM26A2 BCODM36A2 BCODM53A2 Outdoor units BD2M53A3 BD3M98A3 BD4M114A3 BD5M120A3 This manual has been created for informative purpose. The company declines every responsibility for the results of projecting or installation based on the explanations and the technical specifications given in this manual. Is besides forbidden the reproduction under any form of the texts and of the figures contained in this manual.

2 Serie / Series / Serie / Serie TECHNICAL MANUAL CONSOL MULTI DC Emissione / Issue Ausgabe / Emission Sostituise / Supersade Ersetzt / Remplace Catalogo / Catalogue / Katalog / Catalogue MTE01033D

3 INDICE 1. Specifics Outdoor units specifics Indoor units specifics ise criteria curve tables for both models Outlines and dimensions Indoor units Outdoor units Refrigerant circuit Electrical diagram Indoor units Outdoor units Printed circuits Indoor units Outdoor units Control functions Temperature parameters System basic function Others Display Outdoor units operation Temperature parameters System basic function Troubleshooting Malfunction Display of Indoor Unit How to Check simply the main part Maintenance method for normal malfunction Malfunction Display of Outdoor Units (BD2M53A3, BD3M98A3, BD4M114A3) Malfunction checking and elimination Error description of indoor units and outdoor unit BD5M120A Appendixes 1: Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units (15K) : Resistance Table of Outdoor and Indoor Tube Temperature Sensors (20K) : Resistance Table of Outdoor Discharge Temperature Sensor (50K)

4 1. Specifics 1.1 Outdoor units specifics Cooling Heating Outdoor unit Connection pipe Models BD2M53A3 BD3M98A3 BD4M114A3 BD5M120A3 Power supply V- Ph, Hz 230V 220 ~ 240V,1, 50Hz Capacity kw 5,0(2,0~6,3) 7,0(2,0~10,0) 8,0(2,0~10,0) 11,6(3,5~13,6) Btu/h 17,0(6,9~21,5) 24,2(6,8~34,1) 27,2(7,5~46,4) 39,5(7,1~46,4) Power input kw 1,5(0,5~2,5) 2,15(0,6~4,5) 2,4(0,6~4,6) 3,5(0,9~4,9) Absorbed current A 6,8 10,9 11,5 16,4 S.E.E.R. W/W 5,60-A+ 5,10-A 5,10-A 3,37-A Capacity kw 5,6(2,5~6,6) 8,5(3,2~11,0) 9,6(2,8~11,0) 13,2(2,6~14,0) Btu/h 19,1(8,5~22,6) 29,0(10,9~37,5) 32,7(9,5~37,52) 45,0(8,8~47,7) Power input kw 1,5(0,5~2,7) 2,28(0,8~3,9) 2,5(0,9~4,5) 3,5(1,3~4,4) Absorbed current A 6,8 11,4 11,5 16,2 S.C.O.P. W/W 3,80-A 3,80-A 3,8-A 3,67-A MITSUBISHI ELECTRIC Compressor trademark ZHUHAI LANDA COMPRESSOR CO. LTD (GUANGZHOU) COMP. CO. LTD Compressor model QXA-B141zF030A QXAS-D23zX090B QXAS-D23zX090B TNB306FPGMC Compressor type DC inverter Rotary Compressor oil RB68EP PVE(FV50S) Comp. oil charge L 0,39 0,95 0,95 0,87 L.R.A. / Compressor RLA A 7,2 11,5 11,5 13,50 Compressor input W Compressor capacity W Comp. Overload protector 1NT11L-6233 Internal Throttling method Electronic expansion valve Starting method Transducer starting Working temp range C -15 C T 48 C Condenser material Aluminum fin-copper tube Rows-Fin Gap mm Coil length (l) x height (H) x coil width (L) mm 851 x 660 x 38,1 982,2 x 748 x 38,1 982,2 x 748 x 38,1 1009,4 x 056 x 38,1 Fan motor speed rpm 880/700/ /600/ /600/ /620/520 Output of fan motor W Fan Motor RLA A 0,56 0,6 0,6 1,4 Fan motor capacitor μf 4 3,5 7 Outdoor air flow volume m 3 /h Fan type-piece Axial fan 1 Fan diameter mm Defrosting method Automatic defrost Climate type T1 T1 Isolation I I Moisture protection IP24 IP4 Permissible excessive operating pressure for the discharge side Mpa 4,3 4,0 Permissible excessive operating pressure for the suction side MPa 2,5 1,3 Sound pressure level db(a) 56/53/50 58/54/52 58/56/53 54/61 Sound power level db(a) 66/63/60 68/64/62 68/66/63 64/71 Outline dimension mm 955 x 700 x x 790 x x 790 x x 1103 x 440 Net / Gross weight kg 50/55 63/69 65/71 102/112 Refrigerant charge kg R410A / 1,40 R410A / 2,0 R410A / 2,2 R410A / 4,8 Max. connection pipe length (for each indoor unit) m Difference in level m Gas additional charge g/m Pipe out. Liquid Inch 1/4 1/4 1/4 1/4 4 x1/4 + 3/8 diameter Gas Inch 3/8 1/2 3/8 3/8 2 x 3/8 + 2 x 1/2 + 5/8 Operating temperature C -15 ~ 48 3

5 1.2 Indoor units specifics MODELS BCODM26A2 BCODM36A2 BCODM53A2 Power supply V-Ph,Hz 230V 220 ~ 240V,1, 50Hz Cooling Heating Total Capacity kw BTU/h Power Input W Absorbed current A 0,1 0,2 0,3 Total Capacity kw BTU/h Power Input W Absorbed current A 0,2 0,2 0,3 Air Flow Volume (m 3 /h) Air filter - PP-MD20 PP-MD20 PP-MD20 Dehumidifying Volume l/h 0,8 1,4 1,8 Dehumidifying Volume Pint/h 1, ,8 Fan Motor Speed (SH/H/M/L) (r/min) 650/560/530/ /650/600/ /800/720/650 Fan Diameter-height mm φ φ φ Motor insulation - E E E Motor Safe Class - IP20 IP20 IP20 Output of Fan Motor W Fan Motor capacitor μf / / / Fan Motor RLA A 0,14 0,14 0,14 Fan Type-Piece - Centrifugal 1 Indoor Coil Motor model Evaporator - Aluminum fin-copper tube Pipe Diameter mm Ø6,35 Row-Fin Gap mm 2-1,2 Coil length (l)xheight (H)xcoil width (L) mm 511 x 396 x 24 Evaporator Max. Allowable Pressure MPa 10,0 FN30A-ZL Overload protector A 3,15 3,15 3,15 Motor Full Load Amp(FLA) A 0,14 0,14 0,14 Sound Pressure Level (SH/H/M/L/SL) db(a) 40/38/33/26 42/40/37/32 48/46/41/35 Sound Power Level (SH/H/M/L/SL) db(a) 50/48/43/36 52/50/47/42 58/56/51/45 Outline dimension (L x W x H) mm 700 x 600 x x 600 x x 600 x 215 Package carton dimension (L x W x H) mm 788 x 695 x x 695 x x 695 x 280 Dimension of Package (W/D/H) mm 791 x 710 x x 710 x x 710 x 286 Liquid connections diameter mm( ) Ø6(1/4 ) Ø6(1/4 ) Ø6(1/4 ) Gas connections diameter mm( ) Ø9.52(3/8 ) Ø9.52(3/8 ) Ø12(1/2 ) Connection method mm Flare Connection Drain Connection (outer diameter) mm Cross-sectional of Power Cable Conductor mm² Recommended Power Cable(Core) N Net Weight/Gross Weight kg 14/18 14/18 14/18 The above data of specifications are subject to change without prior notice. Please refer to the actual data specified on the nameplate of the unit. te: Test conditions: Standard condition Indoor side state Outdoor side state Dry bulb temp. C Wet bulb temp. C Dry bulb temp. C Wet bulb temp. C Rated cooling Rated heating ) Microphone at a distance of 1m from the unit. Approximate calculation from Sound Pressure Level to Sound Power Level: 0.1* L 1 * 2 - Average Sound Pressure Level L p =10*lg[ 1/ 2 * (10 10 ] 0.1 P LP +. L P1 : Sound pressure level of front test point. L P 2 : Sound pressure level of side test point for indoor unit L P1, L P 2. - Approximate Sound Power Lever L = L W p

6 1.3 ise criteria curve tables for both models ise/db(a) 60 18K K 9K 0 Low Middle High Super High Indoor Fan Motor Rotating Speed 2. Outlines and dimensions 2.1 Indoor units Unit:mm 5

7 2.2 Outdoor units - BD2M53A Unit:m m - BD3M98A3, BD4M114A Unit:mm - BD5M120A Unit:mm 6

8 3. Refrigerant circuit MODELS: BD2M53A3, BD3M98A3, BD4M114A3 indoor outdoor filter fan A heat exchanger A3 A1 filter A2 outdoor heat exchanger B heat exchanger B3 B1 4-way valve filter B2 SP high pressure switch te: t available for 14K/18K model discharge silencer C heat exchanger D heat exchanger C3 D3 C1 filter D1 filter C2 D2 gas -liquid separator inverter compressor discharge temperature sensor te: t available for 14K/18K model A1:A-unit electronic expansion valve A2:A-unit gas pipe temperature sensor A3:A-unit liquid pipe temperature sensor B1:B-unit electronic expansion valve B2:B-unit gas pipe temperature sensor B3:B-unit liquid pipe temperature sensor C1:C-unit electronic expansion valve C2:C-unit gas pipe temperature sensor C3:C-unit liquid pipe temperature sensor D1:D-unit electronic expansion valve D2:D-unit gas pipe temperature sensor D3:D-unit liquid pipe temperature sensor MODEL: BD5M120A3 M 7

9 4. Electrical diagram 4.1 Indoor units MODELS: BCODM26A2, BCODM36A2, BCODM53A2 ROOM TEMPTUBE TEMP. RECEIVER AND FANMOTOR SENSOR ṠENSOR DISPLAY BOARD 0 RT2 0 RT1 AP2 DISPLAY MAGNETIC RING M3 L2 WARNI NG Pl ease don' t t ouch any el ect r oni c component or t er mi nal when t he machi ne i s r unni ng, st oppi ng or has been power ed of f f or l ess than3mi nut es t o pr event el ect r i c shock! 4.2 Outdoor units MODEL: BD2M53A3 ROOM BU AP1 PRINTED CIRCUIT BOARD N BK CAP COM-OUT BN AC-L JUMP SWING-DOWNSWING-UP M1 STEPPING MOTOR TUBE M2 DISP1 DISP2 X1 CN8 S AP3 STEPPING MOTOR SELECT SWITCH HEALTH-LHEALTH-N RD X2 RD DC-MOTOR BU BU E YEGN COLD PLASMA GENERATOR YEGN L1 L1 L1 YEGN XT N(1) BN TERMINAL BLOCK PE PE EVAPORATORELECTRIC BOX 2 3 BU BK YEGN OUTDOOR UNIT 8

10 MODEL: BD3M98A3 MODEL: BD4M114A3 9

11 MODEL: BD5M120A3 LEGEND BN Brown M1 Fan motor AP2 Display (for cassette and floor-ceiling indoor units) BU Blue M2 Left stepping motor AP3 Manual panel (for any indoor unit) BK Black M3 Right stepping motor AP3 Drive board (for any outdoor unit) GY Gray L Line AP4 Power Module WH White N Neutral RT1 Room temperature sensor RD Red XT Terminal block RT3 Pipe mid temperature sensor YEGN Yellow green TC Transformer RT4 Pipe in temperature sensor X Connector AP1 Main control board AP2 PFC Module (for outdoor units) CN Connector on board Protective earth 10

12 5. Printed circuit board 5.1 Indoor units Models: BDAM26A1, BDAM36A1, BDAM53A Part name 1 Connect earthing wire Input of live wire 3 Wiring terminal for health function (optional) 4 Input of neutral wire 5 6 Control the wiring terminal of down Communication interface for indoor unit and outdoor unit 7 Terminal of display interface 8 Needle stand of jumper cap 9 10 Wiring terminal of indoor tube temperature sensor Wiring terminal of indoor ambient temperature sensor 11 Wiring terminal of up swing Wiring terminal of down swing 13 Wiring terminal of DC motor 5.2 Outdoor units Model: BD2M53A Part name 1 Compressor terminal 2 Temp. sensor terminal of low ambient temp. cooling 3 Compressor overload protection terminal Outdoor temp. sensor terminal 5 High pressure protection terminal 6 Low pressure protection terminal 7 Outdoor fan terminal Terminal of chassis electric 8 heating belt 9 4-way valve terminal 10 Terminal of compressor electric heating belt Temp sensor terminal of gas valve and liquid valve 12 Electric expansion valve terminal 13 Terminal of IDU and ODU communication wire 14 Terminal of communication neutral wire 15 Live wire terminal 16 Neutral wire terminal 11

13 Models: BD3M98A3, BD4M114A3 BD5M120A Part name 1 Compressor terminal 2 High pressure protection terminal 3 Low pressure protection Compressor overload protection 4 terminal 5 Outdoor temp. sensor terminal 6 Terminal chassis electric heater 7 Terminal of comp. electric heater 8 Outdoor fan terminal 9 4-way valve terminal 10 Unit A liquid valve and gas valve temp. sensor 11 Unit B liquid valve and gas valve temp. sensor 12 Unit C liquid valve and gas valve temp. sensor 13 Unit D liquid valve and gas valve temp. sensor 14 Unit A electronic expansion valve 15 Unit B electronic expansion valve 16 Unit C electronic expansion valve 17 Unit D electronic expansion valve 18 Communication wire with indoor 19 Communication neutral wire 20 Live wire 21 Neutral wire 22 Reactor 1 23 Reactor 2 Part name 1 FA-FE: Teminals of EXV (Electronic expansion Valve) 2 JUMP2:the code of capacity 3 SA1: Master select switch 4 T-SENSOR2:Teminals of temperature sensor 5 TUBE-A - TUBE-E: Terminals of tube temperature sensor 6 OVC-COMP:Teminals of overload protector 9 LPP:Teminals of low pressure 7 switch 8 HPP:Teminals of high pressure switch 9 4V1:Teminals of 4-way valve COM:Teminals of communication 11 OFAN1:Teminals of fan E1:Teminals of Earth 13 Unit D liquid valve and gas valve temp sensor 14 Unit A electronic expansion valve 15 Unit B electronic expansion valve 16 Unit C electronic expansion valve Unit D electronic expansion valve 18 Communication wire with indoor unit 19 Communication neutral wire 20 Live wire 21 Neutral wire 22 Reactor 1 23 Reactor 2 12

14 6. Control functions 6.1. Temperature Parameters Indoor ambient temperature (Tin_amb.) Evaporator tube temperature (Tin_tube) Setting temperature (Tset) te: The following function manual, the temperature unit is centigrade, if there is Fahrenheit, there will be T( F)=T( C)x Basic functions Cooling mode 1. Temperature can be set in the range of 16 ~ 30 C. 2. The unit will firstly run at high fan speed for 8s and then switch to preset fan speed. 3. When error of outdoor unit occurs or the unit stops for protection, indoor unit will keep its original operating state Dehumidifying mode 1. Temperature can be set in the range of 16 ~ 30 C. 2. The unit will firstly run at high fan speed for 8s and then switch to low fan speed. 3. When error of outdoor unit occurs or the unit stops for protection, indoor unit will keep its original operating state Fan mode 1. Temperature can be set in the range of 16 ~ 30 C. Setting temp on manual controller is defaulted to 26 C. 2. The unit will firstly run at high fan speed for 8s and then switch to preset fan speed. 3. When error of outdoor unit occurs or the unit stops for protection, indoor unit will keep its original operating state Heating mode 1. Temperature can be set in the range of 16 ~ 30 C. 2. If compress stops at required temperature point, indoor fan will run by blowing residual heat. 3. If compress under heating mode stops for error, indoor fan will run by blowing residual heat. 4. Function of blowing residual heat: Indoor fan switching into low speed will stops after 1 min delay. 5. Anti-cold air After heating compressor runs, indoor fan runs according to the following conditions: If compressor runs within 90s and Tin_tube < 35 C, indoor fan won't run. When Tin_tube 35 C or compressor run for 90s above, indoor fan will run at low speed. After 3 min at low speed or Tin_tube 40 C, indoor fan runs at preset speed. Once running, indoor fan won't stop. Once at preset fan speed, it won't forcibly return to low speed AUTO mode 1) When Tin_amb. 25 C, the unit runs under cooling mode, Tset = 25 C. 2) When Tin_amb. 18 C, the unit runs under heating mode, Tset = 18 C.And it runs under fan. 3) When 18 C < Tin_amb. < 25 C, the unit keeps its original operating state. If first energization, it runs under fan mode. te: If wire controller is selected according to condition 3), (1) After auto mode is set, Tin_amb. displayed on wire controller is ambient temperature detected by temp sensor of wire controller. (2) Under heating mode, Tin_amb. displayed on wire controller is temp detected by temperature sensor of manual controller sensor of manual controller Others Buzzer The air conditioner will send out Hua alert when it is energized or receives a control command Auto Button When turn off the unit, press this button, the whole unit will run at auto mode, indoor fan motor will run in auto fan speed, turn on the swing. At unit turns on, press the Auto button that the unit will turns off Auto fan speed control 13

15 Under Cool, Heat, Fan modes, indoor fan will accord to the ambient temperature select High, Mid, Low three speeds, the dehumidifying mode auto fan speed is low. The switch of each fan mode should be 3.5mins Timer function The common setting for Timer: a) Timer on: At unit off, can set up the Timer On function, when Timer On act, the controller will run at original setting mode, the Timer interval is 0.5hr, setting range is hrs. b) Timer off: At unit on, can set up the Timer Off function, when Timer Off act, the unit will turn off, the Timer interval is 0.5hr, setting range is hrs. Hours setting for Timer: a) Timer on: If unit is running then to set up the Timer On, the unit will go on running, if the unit is off to set up the Timer On, when Timer On acts, the unit will run at the presetting modes. b) Timer off: If unit is off then to set up the Timer Off, when setting the Timer off, the unit stand by, if unit is turned on to set up Timer Off, when the Timer Off act, the system will stop to work. c) Timer change: When unit is running in Timer mode, by operate the On/Off of remote controller to turn on or turn off the unit, can reset up the Timer function, the unit will run at the mode of last setting. If unit is running, at the same time to set up Timer On and Timer Off, the system will keep the present setting status, after the Timer On. When system is running, at the same time to set up Timer On and Timer Off, the unit will keep the current presetting working status, if Timer Off acts, the unit will stop working. When unit is stop running, at the same time to set up the Timer On and Timer Off, the unit will keep stop running, until Timer On act, the unit will start to work, after this when Timer On of every day act, it will run at presetting modes, when Timer Off act, the unit will stop to work. If the setting for the Timer Off and Timer On are the same, the Timer Off will act Memory function Contents of memory: Modes, Up and Down Swing, Light, Setting Temp. Setting fan speed, Common setting for Timer (Hours will not memorized). After Timer Off, when re-power on, the unit will automatically turn on and run at memorized contents. There is no Timer Setting in the remote control order that the unit will memorize the remote control order of last setting and it will run at that mode I Feel function When controller received the orders that the controller will work according to ambient temperature which is sent by remote control (Except Defrost and Anti-cool wind, it will still adopt the air conditioner self ambient sensor sampling value), the remote control in every 10mins, to send the ambient temperature value to controller. 11mins later, the controller haven t received the ambient temperature value from the remote control that the air conditioner will run itself ambient temperature. If there is no setting function that the ambient temperature will adopt the AC sensor sampling value. Power off will not memorize this function TURBO function Only in Cool or Heat mode, the Turbo setting is available, when controller received this order; the indoor fan will run at super high, sent the outdoor unit Turbo signal and sent the high fan speed Displayer Basic display (1) After powered on, the displaying failure will fully displayed then only power indicator light on. (2) Remote control to turn on the unit, the running indicator and cooling indicator will light on. Heat mode: the running indicator and heating indicator will light on. In dehumidifying mode, running indicator and dehumidifying indicator light on. Fan mode, running indicator light on. Auto mode: running indicator and actual running mode indicator will light on. (3) If turns off the Light button, that all display will be turned off (still valid at unit off). (4) After set up the SLEEP function, the displayer will keep original displaying status that is Sleep function will not affect the light on and off. 14

16 6.4.2 Forcible Defrosting Function When the unit is in Heat mode and set temperature is 16 C, press +, -, +, -, +, -, successively for 5s, and the indoor unit will enter forcible defrosting setting and send the signal to the outdoor unit. When the indoor unit receives forcible defrosting signal from the outdoor unit, it will exit forcible defrosting setting Refrigerant Recovery Function Enter refrigerant recovery mode: turn on the unit within 5 min after energization and at 16 C cooling mode. Press remote controller light off button successively for 3 times within 3s and the unit will enter refrigerant recovery mode, displaying Fo. The signal will be sent to the outdoor unit. Exit refrigerant recovery mode: during refrigerant recovery, if any signal from remote controller is received or refrigerant recovery lasts for 25min, it will exit this mode Pre-operation Function When Cool mode at 30 C is set, press -, +, -, +, -, + successively for 3s, it will enter pre-operation mode. The signal will be sent to the outdoor unit. Pre-operation mode: it performs cooling operation (indoor fan does not operate) and display dd. After exiting preoperation mode, the indoor unit will stop displaying dd. If the signal of wrong wire connection or expansion valve malfunction is received, dn will be displayed Mode Conflict When the mode of started unit is different from that of operating unit, the indoor unit will display mode conflict code E7. 15

17 7. Outdoor units Operation 7.1. Temperature parameters Outdoor ambient sensor temperature (Tout_amb.) Outdoor heat exchanger tube sensor temperature (Tout_tube) Setting temperature (Tset) 7.2. System basic function Cool mode Heat mode transfers to Cool mode (1) Compressor stops. (2) Four-way valve delayed 2mins power off Cool operation and stop running condition (1) When Tin_amb - Tset 0.5 C, cooling operation will run (Cool mode starts up and arrive at the temperature of unit on). (2) When the capacity requirement is 0 (Cool and unit stops). te: Unit off, fan is the same as Cool and unit will stop Outdoor fan motor control Outdoor fan unit start up (stop-turn on), firstly run at high speed for 3 mins, then according to control logic adjust, when compressor stop, outdoor fan will stop after 1min delay. (1) To turn on one indoor unit: when Tout_amb <25 C, outdoor fan will run at low fan speed. When Tout_amb 25 C, outdoor unit will run at high speed. (2) To turn on two indoor units: when Tout_amb <18 C, outdoor fan will run at low speed; when Tout_amb 18 C, outdoor fan run at high speed. te: When only one unit is turned on, to increase turn on one indoor unit dual unit, outdoor fan will run at high speed for 3min, then according to control logic adjust Four-way valve control In this mode, four-way valve off (cannot electrify) Control logic in detail According to the difference of indoor unit evaporator inlet and outlet temperature (called actual overheat degree ) and goal overheat degree to confirm indoor unit expansion valve open degree Anti-freezing protection under Cool mode If satisfied with the anti-freezing protection condition, system will enter into anti-freezing protection status, if only single unit anti-freezing protection act, the indoor unit capacity preset as 0; if all the unit start anti-freezing protection, the compressor will stop, outdoor fan will stop after 60s delay. If arrive at anti-freeze condition, finish anti-freezing Dehumidifying mode Under this mode, outdoor fan, compressor start up is the same with control condition and Cool modes Heat mode Cool mode transfers to Heat mode (1) Compressor stops running. (2) Four-way valve delays 2mins will electrified; same disposal procedure under each protection Heat operation and stop running condition (1) When Tin_amb (Tset +3) ± 0.5 C, heating operation will run (Heat mode starts up and arrive at the temperature of unit on). (2) In Heat mode unit will stop Fan motor control Outdoor unit start up (Stop --Turn on) firstly will run at high speed for 3 mins, it will accord to control logic to adjust, if compressor stop running, outdoor fan will stop after 1 min delay. Outdoor fan control logic: There will be at least 80s for each modes switch. 16

18 Four-way valve control In this mode, four-way valve electrify. te: In each mode, after protection and unit stop, modes switch or unit off, 4-way valve will power off after 2 minutes delay Defrosting under Heat mode Under Heat mode, there is intelligent defrosting Heating Turbo function When outdoor unit received heating mode Turbo function from the indoor unit, at this time, outdoor unit add certain frequency running Fan mode When outdoor unit main mode transfer from Cool (Dehumidify) or Heat mode to Fan mode, compressor stop running, outdoor fan will stop running after 1min delay Electric heat control target Compressor electric heat belt control After powered on, if Tout_amb. -5 C and compressor hasn t start up, electric heat belt will start to work. After compressor started up or Tout_amb.> -3 C, the electric heat belt will stop to work; If -5 C < Tout_amb, compressor electric heat belt will keep original status Chassis electric heating cord control (optional) From entering into Defrosting to Defrosting finish, within compressor started up 3 minutes, if ambient temp. is very low, chassis electric heating belt work; if ambient temperature is very high, it will not work System protection function Indoor unit modes confliction protection If indoor unit presetting is different, will accord to the following condition for running: will accord to the first entering indoor unit mode for the fiducial mode, to compare with other indoor unit modes to judge whether confliction happen or not. 1) Cool (Dehumidify) conflict with Heat mode: some indoor unit received the outdoor unit mode confliction signal later, this indoor unit will turn off, memorize unit off status. 2) Fan and Heat confliction: some indoor unit received outdoor unit mode confliction signal later, this indoor unit will turn off, memorize unit off status Air exhaust temperature protection If continuously 6 times, air exhaust temperature protection happened, the compressor cannot resume to run. If need to power off and re-power on can resume. (if compressor running time exceed 7mins, the protection time will clear 0.) Communication malfunction If continuously 3mins hasn t received the correct signal of indoor unit and within 10s, cannot receive the correct signal from the drive board that is the communication malfunction, outdoor unit will stop running, auto heating or heating mode, blow surplus heat, in other modes, indoor unit will run at presetting fan speed Power module protection and module overheat protection Mode protection acts, compressor stop running, after compressor stopped 3mins, will automatically resume to running status, if protection times continuously happened 6 times (if compressor running time exceed 7mins, the protection times will clear 0), unit turned off and sent wrong signal to indoor unit, cannot resume running status; It is need to repower on can resume to run Compressor overcurrent protection If detected the whole unit current value exceeded the determinative value, compressor stopped 3mins later, it will automatically resume to running status, protection times exceeds 6 times (if compressor running time is more than 7min, that the protection times will clear to 0), unit will turn of sent wrong signal to indoor unit, cannot automatically resume to run. At this time, it is need to power off and re-power on can resume. 17

19 Sensor malfunction detection Outdoor: at unit standby, do not test outdoor each sensor malfunction, unit turned on and compressor continuously run for 3mins later, start to detect air exhaust sensor malfunction; Defrosting (or heating oil return) finished, within 10mins, do not detect outdoor tube sensor malfunction; Other outdoor sensors after unit turned on start to detect malfunction, outdoor each sensor continuously 30s does not in the temperature upper limit or down limit will alarm. Indoor: Under any status to test indoor each sensor malfunction, continuously 30s does not during the temperature upper and down limit, will alarm. Upper and lower limits of temperature sensors Indoor ambient sensor (sensor with 15K resistance and connected with a 15K resistance) -40 C 142 C Indoor inlet tube sensor (sensor with 20K resistance and connected with a 20K resistance) -40 C 136 C Indoor central tube sensor (sensor with 20K resistance and connected with a 20K resistance) -40 C 136 C Indoor outlet tube sensor (sensor with 20K resistance and connected with a 20K resistance) -40 C 136 C Outdoor ambient sensor (sensor with 15K resistance and connected with a 15K resistance) -40 C 142 C Outdoor tube temperature sensor (sensor with 20K resistance and connected with a 20K resistance) -40 C 136 C Outdoor air exhaust sensor (sensor with 50K resistance and connected with a 15K resistance) -26 C 140 C Anti-high temperature protection under Heat mode If detected some indoor unit tube temperature is very high, that the indoor unit will stop running after arrived at preset temperature, if tube temperature resumed, the compressor will resume to run Compressor delay protection Due to each protection, malfunction arrived at the temperature, after compressor stopped running, when restart up, there will be 3mins delay, power off exception Compressor high-pressure protection After high-pressure protection malfunction happened, if continuously detected compressor high-pressure switch closed, it need to power off, then re-power on, the whole unit will resume to run Compressor overload protection If detected the compressor overload switch act, it will run at indoor temperature arrive at presetting temperature condition, the unit will stop and display corresponding malfunction, compressor stopped for 3mins above and compressor overload switch reset, the whole unit will automatically resume to running status. Protection times exceeds 6 times (if compressor continuously running time exceed 7min, that the protection times will clear 0) without automatically response, it need to power off and re-power on for resume Demagnetization current protection When detected demagnetization current value is larger than regulative value, compressor will stop running Compressor startup Compressor start up at 30 Hz frequency, after start up, according to whole unit capacity requirement rise frequency running. During raise up to the target frequency, each protection condition (including frequency raise condition and current protection condition) will act PFC act After outdoor unit sent turn on order to drive board, PFC will turn on at once, after 3s the compressor will start up after compressor stop running, PFC will stop working at once. 18

20 8. Troubleshooting 8.1. Malfunction Display of Indoor Unit a) Malfunction display requirement When there are several malfunctions, they will be displayed circularly. b) Malfunction display method (1) Hardware malfunction: immediate display; refer to malfunction display table ; (2) Operation state: immediate display; refer to malfunction display table ; (3) Other malfunctions: it is displayed after the compressor stops for 200s; refer to malfunction display table. te: when the compressor is restarted, the malfunction display delay time (200s) is cleared. (4) When the unit is under limit frequency or frequency drop state, the display can be controlled via remote controller. c) Malfunction display control: The indicator lamp and dual 8 nixie tube displays shall be synchronized. That is when the indicator lamp blinks, the dual 8 nixie tube displays the corresponding malfunction code. d) Display control via remote controller Enter display control: press light button successively for 4 times within 3s to display the corresponding malfunction code; Exit display control: pressing light button successively for 4 times within 3s or after display is shown for 5min, the display will terminate. Malfunction name "88" Display Indoor Unit Indicating Lamps RUN " " COOL " " HEAT " " Malfunction of Jumper cap C5 Flash 15 times feedback from indoor unit s fan motor H6 Flash 11 times Zero detection circuit error U8 Flash 17 times Short/open circuit of the indoor ambient temp. sensor F1 Flash once Short/open circuit of the indoor evaporator F2 Flash twice Liquid valve temperature sensor malfunction b5 Flash 19 times Gas valve temperature sensor malfunction b7 Flash 22 times Short/open circuit of the of the IPM module temp. sensor P7 Flash 18 times Short/open circuit of the outdoor ambient temp. sensor F3 Flash 3 times Short/open circuit of the outdoor condenser tube sensor. F4 Flash 4 times Exhaust sensor open or short circuit F5 Flash 5 times Communication error between the indoor and outdoor units E6 Flash 6 times Compressor phase current error U1 Flash 12 times IPM high temperature protection P8 Flash 19 times Capacitor charge error PU Flash 17 times Refrigerant system high pressure protection E1 Flash once Compressor thermal overload protection H3 Flash 3 times Wrong connection for communication wire or malfunction of expansion valve (free match) dn / / / Wrong connection for communication wire or malfunction detection status dd / / / Mode conflict E7 Flash 7 times Refrigerant recovery mode Fo Flash once Flash once / / / / / Compressor start-up failure Lc Flash 11 times Compressor discharge high temperature protection E4 Flash 4 times Anti-high temperature protection E8 Flash 8 times AC over-current protection E5 Flash 5 times Overload protection P5 Flash 15 times Compressor desynchronizing H7 Flash 7 times Compressor phase failure / phase-inverse protection Ld IPM module protection H5 Flash 5 times Over voltage protection for PN PL Flash 21 times DC bus-bar high voltage protection PH Flash 11 times PFC protection HC Flash 6 times Limit/decrease frequency due to current protection of the complete unit F8 Flash 8 times Limit/decrease frequency due to module current protection (phase current) En / / / Limit/decrease frequency due to discharge F9 Flash 9 times Limit/decrease frequency due to freeze protection FH Limit/decrease frequency due to overload F6 Flash 6 times Limit/decrease frequency due to module temperature protection EU Flash 6 times Flash 6 times Oil return under cooling F7 Flash 7 times Cold air prevention protection E9 Flash 9 times Freeze protection E2 Flash 2 times 19

21 8.2. How to Check simply the main part (1) F1/F2 Troubleshooting for malfunction of temperature sensor Main check point: Whether the temperature sensor is broken or damaged; Whether the temperature sensor terminal is loosened or not connected; Whether the mainboard is damaged; Start Is the wiring terminal between temperature sensor and the control board loosened or poorly connected? Is the temperature sensor normal according to the resistance table? Insert the temperature sensor tightly Malfunction is eliminated Replace it with a temp. sensor with the same model Replace the control board with the same model End Malfunction is eliminated? (2) E6 Troubleshooting for communication malfunction 1. Check if connection wire between indoor and outdoor units and wires inside the units are connected well. 2. Check if mainboards of indoor or outdoor units are damaged. Communication malfunction of some indoor units Disconnect the power and check if the connection of wire of indoor and outdoor units and wiring inside electric box are correct. Wires are connected correctly? Connect wires according to the wiring diagram Is malfunction removed? De-energize the unit. Change the communication wire of indoor unit. Energize the unit and wait for 3 mins. Does the broken-down indoor unit resume normal? Replace mainboard of outdoor unit Replace the mainboard of the indoor unit with malfunction End 20

22 Communication malfunction of all indoor units De-energize the unit and check if the connecting wire of indoor and outdoor unit and wiring of electric box are correct. Wires are connected correctly? Connect wires according to the wiring diagram Is malfunction removed? Disconnect the power. Check if the connecting wires between main control board of outdoor unit and filter plate are connected correctly by referring to wiring diagram. If wires are connected correctly? Connect wires according to the wiring diagram Is malfunction removed? If connecting wires are damaged? Replace the connecting wires Is malfunction removed? Check if there is power input between neutral wire of mainboard and live wire of outdoor unit. Is there power input? Replace filter plate of outdoor unit Is malfunction removed? Replace main control board of outdoor unit Does communication resume normal? Replace main control board of indoor unit End 21

23 (3) C5 Malfunction Possible causes: 1. There is no jumper cap on the controller; 2. Jumper cap is not inserted properly and tightly; 3. Jumper cap is damaged; 4. The corresponding circuit of mainboard is damaged. See the flow chart below: C5 is displayed on the unit. Check whether the main control board is inserted with the jumper cap? Insert a matching jumper cap. Is the malfunction eliminated? Check whether the jumper cap is poorly connected? Re-insert the jumper cap. Is the malfunction eliminated? Replace the jumper cap Is the malfunction eliminated? It s the malfunction of mainboard; replace it End 22

24 (4) H6 Malfunction Possible causes: 1. Fan motor is locked; 2. The feedback terminal of PG motor is not connected tightly; 3. The control terminal of PG motor is not connected tightly; 4. Motor is damaged; 5. Malfunction of the rotation speed detection circuit of the mainboard. See the flow chart below: H6 is displayed on the unit. Stir the fan blade with a hand when the unit is DE-ENERGIZED. Does the blade rotate unsmoothly? Reinstall the motor and the blade to make it rotate smoothly. Is the malfunction eliminated? Is the feedback terminal of PG motor loose? Insert the feedback terminal tightly. Is the malfunction eliminated? Is the control terminal of PG motor loose? Insert the control terminal tightly. Energize the unit and turn on the unit. After the horizontal louver opens for 1 min, measure whether the input DC voltage VDC (red wire) of motor is 300s, whether the DC voltage VCC (white wire is 15V and whether the output VSP (yellow wire) is more than 1.1V. The grounding wire is black wire; Is the malfunction eliminated? Replace the fan motor Whether the voltage on motor feedback terminal (blue wire) is more than 1.1V Is the malfunction eliminated? Mainboard malfunction; Replace it End 23

25 8.3 Maintenance method for normal malfunction When set short-circuiter is ON, it trips immediately. Check insulation resistance for grounding; Confirm if air-conditioning unit has electrical leakage or is short-circuited. Breaker tripe or fuse burnt out. When turning the air-conditioning unit to the ON status, trip of circuit breaker occurs several minutes later. Failure of air-conditioning unit or component insulation failure, short circuit or electrical leakage owing to insulation puncture after heating, measure insulation resistance or check the components one by one to find the ones with failure; failure of circuit breaker itself, replace it. Air conditioner cannot start up Air conditioner does not response after powered on. (The buzzer does not sound after the plug is connected and the unit does not response after the remote controller is used to turn it on. power supply. The power plug is not or poorly connected. Controller fuse is burnt out. Loose or poor contact of transformer connection, or transformer malfunction. Check power supply line. Check and secure the plug to ensure firm Replace controller fuse. Secure the wire connection: measure the output voltage of the transformer and replace it if the value is wrong. The controller is broken Replace the controller. Batteries of remote controller are low. Change batteries. Remote controller does not receive signal (When powered on, the buzzer will send out a sound, unless it is broken) Malfunction of remote controller. Loose or poor connection of receiver. Receiver is broken. First press the "AUTO" button of the manual switch. If there is no response, check according to the above method; if it is normal after the button is pressed, check if the installation location and wire connection of the receiving head are correct. If correct, replace the receiving head, or the remote controller. Power voltage is too low. Check power voltage. If the voltage is 10% than rated voltage, check the cause, and improve the power supply conditions such as adding regulated power supply. 24

26 Improper setting of temperature. Adjust the set temperature. Whether cooling (heating) load is proper Check the estimated load of cooling (heating) load. Leakage of insufficient refrigerant. Leakage occurs between high and low pressure inside compressor. Vacuumize after leakage detection and leakage repair. Charge refrigerant according to specification. Replace the compressor. Malfunction of refrigerant flow Malfunction of four-way valve. Replace the four-way valve. Partial blockage of capillary. Replace the capillary. Poor cooling (heating) effect Blockage of cooling system. Poor thermal insulation of connecting pipe of indoor and outdoor units Heat exchanger of outdoor unit is blocked. Use the method of observing condensation on the evaporator and pressure value of high pressure manometer to see whether the system is blocked and carry out corresponding handling on the system. Ensure that both big pipe and small pipe are insulated well. The exposed part of the connector and copper pipe must be insulated as well. Clean the dust accumulated on the surface of the heat exchanger. Air filters are blocked. Clean the filter Air circulation is insufficient. Fan speed is set too slow. Fan speed turns low. Set the fan speed to high or medium speed. Capacitor is damaged. Motor is damaged. Replace the capacitor. Replace the motor. Improper installation location for outdoor unit. Outdoor unit should be installed in a place with well ventilation. Outdoor temperature is too high. Flashing or awning can be installed appropriately. If the maximum cooling capacity cannot be satisfied, replacement of the air conditioner is recommended Indoor space is not sufficiently closed, or people enter or leave the room frequently, or there is heating equipment operating in the room. Keep the indoor space as closed as possible, do not use electrical appliance generating large amount of heat. 25

27 When air supply mode is selected, the fan does not operate. Indoor fan motor burned out or there is wire breakage or failure of overheating The internal overheating protector frequently breaks as overheating is caused by abnormity of motor. Wrong wires connection Replace fan motor or components with failure. Replace fan motor. Correctly connect lines according to electrical diagram. Open circuit or damage of fan capacitor. Replace it with fan capacitor of the same model and spec. When in the cooling mode, the compressor operates but the outdoor fan does not operate. Outdoor fan motor is damaged. Wrong wires connection. Outdoor fan capacitor is damaged. Replace the fan motor. Correctly connect lines according to electrical diagram. Replace fan capacitor. Compressor failure. Replace compressor. When in the cooling mode, the outdoor fan operates but the compressor do not operate. Operating capacitor of compressor is damaged. Voltage is too low or too high. Wrong wires connection. Failure of protector itself. Replace capacitor. It is suggested to equip voltage regulator. Correctly connect lines according to electrical diagram. Use universal meter to check if contacts of compressor not overheated are conducting; replace protector in case of non-conducting conditions. Insufficient or too much refrigerant. Adjust refrigerant amount. Compressor is overheated so protector is activated. Capillary is blocked so air intake is too high. Compressor does not operate smoothly (seized or jammed), air discharge valve is damaged. Replace capillary. Replace Compressor. Failure of protector itself. Replace protector. Swing lover does not run. Torque of swing motor is insufficient Wrong wires connection Controller is damaged, swing relay can not close. Firstly check if line connections have fault, if no, replace components at failure position. 26

28 In cool, heat mode, the outdoor unit and compressor will not run Controller malfunction (IC broken, creepage of parallel capacitor of relay loop, relay is broken etc.) Wire loose or wrong connection. Improper setting of temperature. Change controller. Correctly wire according to the diagram. Adjust setting temperature. Water leakage Block or breakage of drainage pipe. The refrigerant pipe joint is not wrapped firmly. Replace drainage pipe. Wrap and bind it again firmly. Fan of indoor unit touches other positions. Adjust fan position. Foreign articles inside the indoor unit. Remove foreign artiche. Abnormal sound and vibration Vibration of compressor is violent. Pipes of outdoor unit bump together. Adjust support foot mat of compressor, tighten loose bolts. Separate bumping pipes. Metal plates bump together inside the unit. 1. Tighten connection screws 2. Attach vibration damping gum between metal plates. Indoor fan bumps cabinet. Adjust fan position. Abnormal sound inside compressor. Replace compressor. 27

29 8.4 Malfunction Display of Outdoor Units (BD2M53A3, BD3M98A3, BD4M114A3) When several malfunctions occur at the same time, they will be displayed in circulation and every malfunction is displayed for 5s. te: : off, : on, : blink Malfunction description LED1 LED2 LED3 LED4 0 rmal stop 1 Compressor run 2 Compressor overload protection 3 Discharge protection 4 Outdoor unit overload protection 5 High pressure protection 6 Overcurrent protection 7 IMP protection 8 IMP overheating protection 9 PFC protection (including PFC overheating protection) 10 Phase current protection 11 High voltage protection 12 Insufficient voltage protection 13 Start failure 14 Compressor desynchronizing 15 Compressor phase-lacking protection 16 Compressor phase current detection malfunction 17 Memory chip mistake 18 DC power supply circuit-short 19 Defrosting 20 Oil return 21 Complete unit frequency restriction protection 22 Complete unit frequency dropping protection 23 Unit A frequency restriction or frequency dropping protection 24 Unit B frequency restriction or frequency dropping protection 25 Unit C frequency restriction or frequency dropping protection 26 Unit D frequency restriction or frequency dropping protection 27 Outdoor ambient temperature sensor protection 28 Outdoor tube temperature sensor protection 29 Discharge temperature sensor protection 30 IPM thermal resistance malfunction 31 Unit A liquid pipe temperature sensor malfunction 32 Unit A gas pipe temperature sensor malfunction 33 Unit B liquid pipe temperature sensor malfunction 34 Unit B gas pipe temperature sensor malfunction 35 Unit C liquid pipe temperature sensor malfunction 36 Unit C gas pipe temperature sensor malfunction 37 Unit D liquid pipe temperature sensor malfunction 38 Unit D gas pipe temperature sensor malfunction 39 Unit A mode conflict 40 Unit B mode conflict 41 Unit C mode conflict 42 Unit D mode conflict 43 Communication failure with Unit A 44 Communication failure with Unit B 45 Communication failure with Unit C 46 Communication failure with Unit D 47 Unit A freeze protection 48 Unit B freeze protection 49 Unit C freeze protection 50 Unit D freeze protection 51 Unit A overheating prevention protection 52 Unit B overheating prevention protection 53 Unit C overheating prevention protection 54 Unit D overheating prevention protection 55 Unit A communication wire misconnection or expansion valve malfunction 56 Unit B communication wire misconnection or expansion valve malfunction 57 Unit C communication wire misconnection or expansion valve malfunction 58 Unit D communication wire misconnection or expansion valve malfunction 28

30 8.5 Malfunction checking and elimination te: Discharge the position in below pictures with discharge resistance after open the top cover and check if the voltage is below 20V with universal meter, then begin to check. BD2M53A3 BD3M98A3, BD4M114A3 29

31 (1) IPM protection malfunction: Main checking point: If the input voltage of the unit is within normal range? If the connection wire of compressor is connected well? Is it loose? If the connection sequence is correct? If the resistance of compressor coil is normal? If the isolation of compressor coil with copper pipe is good? If the unit is overloaded? If the heat radiation of the unit is good? If the refrigerant charge is suitable? Energize the unit Please check: 1. if the indoor and outdoor heat exchanges are dirty, if there is obstacle to affect the radiation; 2. if the indoor and outdoor fans are running normally; 3. if the pressure of the system is too high; 4. if the refrigerant is too much which causes the high level of pressure; If the above cases are existed? If the wire of compressor is connected well and correctly? Correct according to the service manual and then energize the unit to operate. Test the resistance between the three phases Reconnect the wire of the compressor according to the correct wiring method If the resistance is normal? Test the isolation impedance between the three phases of the compressor and the copper pipe If the resistance is above 500M? Replace the compressor Malfunction is eliminated Replace the outdoor mainboard End 30

32 (2) PFC protection malfunction Main checking points: If the power supply is normal; Check if the connection wire of induction is connected well and if the induction is broken; Flow chart: BD2M53A3 Start Check if the power supply is normal Power supply is abnormal Turn on the unit after the power supply resumes to normal situation. Replace the outdoor mainboard End BD3M98A3, BD4M114A3, BD5M120A3 Start Check if the power supply is normal Power supply is abnormal Check if the outdoor induction is broken Turn on the unit after the power supply resumes to normal situation. The induction is broken Replace the outdoor mainboard Replace the induction Malfunction is eliminated End 31