Carrier 40QSM009DS Service Manual
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Carrier 40QSM009DS Service Manual

Carrier 40QSM009DS Service Manual

Light commercial inverter side discharge cdu type
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Table of Contents

1.
2.
Part Names And Functions
3.
4.
5.
6.
7.
8.
9.
15. Solar Panel
17. Disassembly Instructions
WARNING
Installation MUST conform with local building codes or, in the absence of local codes, with the
National Electrical Code NFPA70/ANSI C1-1993 or current edition and Canadian Electrical
Code Part1 CSA C.22.1.
The information contained in the manual is intended for use by a qualified service technician
familiar with safety procedures and equipped with the proper tools and test instruments
Installation or repairs made by unqualified persons can result in hazards to you and others.
Failure to carefully read and follow all instructions in this manual can result in equipment
malfunction, property damage, personal injury and/or death.
This service is only for service engineer to use.
Light commercial InVERTER
Side Discharge CDU type
SERVICE MANUAL
Model Numbers:
Indoor Unit:
40QSM009DS; 40QTD009DS;
40QSM012DS; 40QTD012DS;
40QSM018DS; 40QTD018DS; 40QZL018DS
40QSM024DS; 40QTD024DS; 40QZL024DS;
40QSM036DS; 40QTD036DS; 40QZL036DS;
40QSM048DS; 40QTD048DS; 40QZL048DS;
40QSM060DS;
40QSS018DS;
40QSS024DS;
40QSS036DS;
40QSS048DS;
Outdoor Unit:
38QUA009DS; 38QUA012DS; 38QUA018DS; 38QUA024DS;
38QUA036DS; 38QUA048DS;38QUA060DS;
40QZL060DS;

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  • Page 1: Table Of Contents

    Light commercial InVERTER Side Discharge CDU type SERVICE MANUAL Model Numbers: Table of Contents Indoor Unit: Precaution 40QSM009DS; 40QTD009DS; Part Names And Functions 40QSM012DS; 40QTD012DS; Dimension 40QSM018DS; 40QTD018DS; 40QZL018DS Service space 40QSM024DS; 40QTD024DS; 40QZL024DS; Refrigerant Cycle Diagram 40QSM036DS; 40QTD036DS; 40QZL036DS;...
  • Page 2 CONTENTS 1. Precaution ..............................1 1.1 Safety Precaution .......................... 1 1.2 Warning ............................1 2. Part Names and Features..........................4 2.1 Model Names of Indoor/Outdoor units ..................4 2.2 Part names of Indoor/Outdoor units ....................5 2.3 Features ............................9 3.
  • Page 3 14.4 Operation Modes and Functions ....................80 16. Troubleshooting ............................86 16.1 Indoor Unit Error Display ......................87 16.2 Outdoor unit error display ......................88 For 9K-24K outdoor unit: ........................88 For 36K-48K Outdoor Unit ......................... 88 Outdoor check function........................89 16.3 Diagnosis and Solution ......................

  • Page 4: Precaution

     Be caution when unpacking and installing the product. 1. Precaution Sharp edges could cause injury, be especially careful of the case edges and the fins on the 1.1 Safety Precaution condenser and evaporator.  For installation, always contact the ...
  • Page 5   If strange sounds or smoke comes Install the drain hose to ensure that from product, turn the breaker off or water is drained away properly. disconnect the power supply cable. A bad connection may cause water leakage.  There is risk of electric shock or fire.
  • Page 6  Do not insert hands or other objects through air inlet or outlet while the product is operated.  Do not drink the water drained from the product.  Use a firm stool or ladder when cleaning or maintaining the product. Be careful and avoid personal injury.

  • Page 7: Part Names And Features

    2. Part Names and Features 2.1 Model Names of Indoor/Outdoor units Outdoor units Series Capacity Indoor units Cassette 40QTD018DS Floor Ceiling 40QZL018DS 38QUA018DS; A5 Ducted 40QSM018DS A6 Ducted 40QSS018DS Cassette 40QTD024DS Floor Ceiling 40QZL024DS 38QUA024DS; A5 Ducted 40QSM024DS A6 Ducted 40QSS024DS Cassette 40QTD036DS...

  • Page 8: Part Names Of Indoor/Outdoor Units

    2.2 Part names of Indoor/Outdoor units Cassette Unit...
  • Page 9 A5 Ducted Units A6 Ducted Units...
  • Page 10 Floor ceiling Units...
  • Page 11 HESP DUCTED Units...

  • Page 12: Features

    2.3 Features 2.3.1 A5 Duct Units 2.3.1.1 Easy Installation: Two air Inlet Styles (Bottom side or Rear side)  Air inlet from rear is standard for all capacity; air inlet from bottom is optional.  The size of air inlet frame from rear and bottom is same, it’s very easy to move the cover from bottom to rear side, or from rear to the bottom, in order to matching the installation condition.
  • Page 13 Motor Blower Housing Ventilated Panel 2.3.1.4 Reserved Remote On-off and Central Control Ports  Reserved remote on-off ports and central control ports, can connect the cable of an on-off controller or a central controller to realize remote on-off control function or group control function. Remote on-off ports Central control ports 2.3.1.5 Built-in Drain Pump (Optional):...
  • Page 14 2.3.1.6 Built-in Display Board  The standard indoor unit can be controlled by wired controller.  There is a display board with a receiver in the E-box. Move out the display, and fix it in other place, even in the distance of 2m. The unit will realized remoter control. ...
  • Page 15 2.3.2 Cassette Unit 2.3.2.1 Lower Noise  Optimize air channel system design to ensure the maximum quietness and comfort.  Noise max down 6dB. 2.3.2.2 Turbo Mode (Optional)  Turbo function can boost cooling or heating speed in a short period, and makes the room cool down or heat up rapidly.
  • Page 16 2.3.2.6 Build-in Drain Pump  The drain pump can lift the condensing water up to 750mm upmost.  It’s convenient to install drainage piping under most space condition. 2.3.2.7Terminals For Alarm Lamp and Long-distance On-off Controller Connection Are Standard  Reserve terminals for the connection of alarm lamp and long-distance on-off controller, more human control.
  • Page 17 2.3.3 Ceiling-floor Units 2.3.3.1 Two-way Installation  The rounded design of the ceiling and floor type air conditioner allows either ceiling or floor-level installation. Ceiling installation saves room space, while floor installation helps prevent the loss of warm air. 2.3.3.2 Brief Design ...
  • Page 18 2.3.3.4 Optional Drainage Pipe Connection  Both right side and left side drainage holes are available to avoid the space limitation for drainage pipe installation. Make you more convenient during installation. C Panel (LED display) D Panel 2.3.3.5 Convenience Operating and Easy Maintenance ...
  • Page 19 2.3.4 A6 Duct Units Higher Static Pressure 2.3.4.1.  As a ducted air conditioner with medium static pressure, it has the widest static pressure range.  The maximum static pressure reaches 160Pa Slim Design 2.3.4.2.  The industry Lowest height is designed to be fitted into tight roof spaces. *18K unit - 210mm,24K/36K unit - 249mm,48K unit -300mm 2.3.4.3.
  • Page 20 Air intake from rear (Standard) Air intake from bottom (Optional) 2.3.4.5. Communication wire connection  A6 duct uses two wires without polarity connection way, which almost has no mistake during the installation. Easy Clean 2.3.4.6.  With a larger window design, once the motor and the blower wheels have been detached, heat exchanger and water receiver tray in behind can be seen very clearly.
  • Page 21  A ventilation motor (provided by the installer) can be installed inside the fresh air duct to improve the fresh air volume. There are reserved ports for this motor on main PCB (Standard for 3D inverter units, and only optional for DC inverter 53~160 units). 2.3.4.8.Drain pump (Optional) ...
  • Page 22 2.3.5 HESP DUCTED Units 2.3.5.1 High static pressure design  Max static pressure of indoor unit is 200Pa.  The longest distance of air supply is 40m, the max height of air supply is 6.5m.  Specially recommended for spacious and large rooms like large stores and factories. 2.3.5.2 Easy maintenance ...

  • Page 23: Dimension

    3. Dimension 3.1 Indoor Unit A5 Ducted Units air inlet from rear side Air filter ( optional ) 4-install hanger Liquid side 25 Drain pipe Gas side 25 Drain pipe Test mouth & Test cover 25 Drain connecting pipe ( for pump ) Fresh air intake Electric control box Air filter ( optional )
  • Page 24 Cassette Units(18K) Liquid side Gas side Body Drain hole Wiring connection port ( for Service ) E-parts box 4-Screw hole (for install panel) 4-install hanger Drain pipe Fresh air intake Wiring connection port Panel...
  • Page 25 Cassette Units (24K, 36K, 48K) 92 92 Fresh air intake 4-install hanger Body Gas side Liquid side Wiring connection port E-parts box Service hole for Test mouth & Test cover draining pump Drain hole 92 92 92 92 Panel Capacity (Btu/h) inch 6.30 2.95...
  • Page 26 Ceiling-floor Units (18K-60K) Wiring connection port Drain discharge port Fresh air intake Refrigerant pipe hole Hanging arm Capacity (Btu/h) 1068 18K / 24K inch 42.05 26.57 9.25 38.70 1285 1200 inch 50.59 26.57 9.25 47.24 1650 1565 48K/60K inch 64.96 26.57 9.25 61.61...
  • Page 27 A6 Ducted Units Model unit (KBtu/h) inch 34.6 26.5 23.6 27.8 30.8 36.2 20.0 1100 1001 1140 inch 43.3 30.5 27.6 36.5 39.4 44.9 23.5 1360 1186 1261 1400 inch 53.5 30.5 27.6 46.7 49.6 55.1 23.5 1200 1044 1101 1240 inch 47.2...
  • Page 28 HEPS Ducted Unit (60K) (suspension position) 2-Φ 3.2 Φ 5 NOTE:16 groups all around(the same of the air inlet flange)

  • Page 29: Outdoor Unit

    3.2 Outdoor Unit Note: The above drawing is only for reference. The appearance of your units may be different. Model 38QUA018DS inch 33.3 14.3 27.6 36.0 21.3 13.8 1030 38QUA024DS 38QUA036DS inch 37.2 16.1 31.9 40.6 26.5 15.9...
  • Page 30 Note: The above drawing is only for reference. The appearance of your units may be different. Model 1333 1045 38QUA048DS 38QUA060DS inch 37.5 16.3 52.5 41.1 25.0 15.9...

  • Page 31: Service Space

    4. Service Space 4.1 Indoor Unit A5/A6 Ducted Units Ensure enough space required for installation and maintenance. 200mm(7.87in) or more 300mm(11.81in) or more 600mmx600mm/23.62inx23.62in Check orifice All the indoor units reserve the hole to connect the fresh air pipe. The hole size as following Cassette Units Unit: mm...
  • Page 32 Ceiling-floor Units HESP DUCTED Unit 500mm or more 600mm or more Indoor unit Maintenance and repair space 600mmx600mm...

  • Page 33: Outdoor Unit

    4.2 Outdoor Unit (Wall or obstacle) More than 30cm(11.81in) Air inlet More than 60cm More than 30cm (23.62in) (11.81in) Maintain channel More than 60cm Air inlet (23.62in) Air outlet More than 200cm(78.74in)

  • Page 34: Refrigerant Cycle Diagram

    5. Refrigerant Cycle Diagram INDOOR OUTDOOR Electronic CAPILIARY TUBE expansion valve LIQUID SIDE 2-WAY VALVE T3 Condenser temp. sensor HEAT EXCHANGE (EVAPORATOR) HEAT T4 Ambient T1 Room temp. T2 Evaporator EXCHANGE temp. sensor sensor temp. sensor (CONDENSER) middle T2B Evaporator temp.

  • Page 35: Wiring Diagram

    6. Wiring Diagram 6.1 Indoor Unit 40QTD018DS，40QTD024DS 40QTD036DS， 40QTD048DS...
  • Page 36 40QSM018DS, 40QSM024DS 40QSM036DS, 40QSM048DS...
  • Page 37 40QZL018DS, 40QZL024DS 40QZL036DS...
  • Page 38 40QZL048DS 40QZL060DS...
  • Page 39 40QSS018DS, 40QSS024DS 40QSS036DS, 40QSS048DS, 40QSM060DS Note: If the short connector “J7” or “JR6” is losed, when you don’t use the on-off function, the LED displays error code “CP”.

  • Page 40: Outdoor Unit

    6.2 Outdoor Unit 38QUA018DS ，38QUA024DS...
  • Page 41 38QUA036DS...
  • Page 42 38QUA048DS 38QUA060DS...

  • Page 43: Static Pressure

    7. Fan Curves Static Pressure ENC2 Range In. WG (Pa) Model 0.02 0.04 0.08 0.12 0.16 0-0.18 Model≤12 (10) (20) (30) (40) (0-45) 0.04 0.10 0.14 0.18 0.22 0-0.28 Model Model=18 (10) (25) (35) (45) (55) (0-70) (K Btu/h) 0.04 0.10 0.16 0.22...
  • Page 44 40QSM018DS Code 0 Code 1 Code 2 Code 3 Code 4...
  • Page 45 40QSM024DS Code 0 Code 1 Code 2 Code 3 Code 4...
  • Page 46 40QSM036DS Code 0 Code 1 Code 2 Code 3 Code 4...
  • Page 47 40QSM048DS Code 0 Code 1 Code 2 Code 3 Code 4...
  • Page 48 40QSS018DS Air volume m3 /h(CFM) Air volume m3 /h(CFM) 1800(1059) 1800(1059) 1700(1000) 1700(1000) 1600(941) 1600(941) 1500(882) 1500(882) 1400(823) 1400(823) 1300(765) 1300(765) 1200(706) Limit 1200(706) Limit 1100(647) 1100(647) 1000(588) 1000(588) Rated Point 900(529) Rated Point 900(529) 800(471) 800(471) 700(412) High 700(412) High 600(353) 600(353)
  • Page 49 40QSS024DS Air volume m3 /h(CFM) Air volume m3 /h(CFM) 2600(1529) 2600(1529) 2400(1412) 2400(1412) 2200(1294) 2200(1294) 2000(1176) 2000(1176) 1800(1059) 1800(1059) 1600(941) 1600(941) Rated Point Limit Rated Point Limit 1400(823) 1400(823) 1200(706) 1200(706) 1000(588) 1000(588) High High 800(471) 800(471) Middle Middle 600(353) 600(353) 400(235) 400(235)
  • Page 50 40QSS036DS Air volume m3 /h(CFM) Air volume m3 /h(CFM) 3600(2118) 3600(2118) 3400(2000) 3400(2000) 3200(1882) 3200(1882) 3000(1765) 3000(1765) 2800(1647) 2800(1647) 2600(1529) 2600(1529) 2500(1471) 2500(1471) 2400(1412) 2400(1412) 2200(1294) 2200(1294) 2000(1176) 2000(1176) Rated Point Rated Point 1800(1059) 1800(1059) 1600(941) 1600(941) Limit 1400(823) 1400(823) Limit High High...
  • Page 51 40QSS048DS Air volume m3 /h(CFM) Air volume m3 /h(CFM) 4200(2471) 4200(2471) 4000(2353) 4000(2353) 3800(2235) 3800(2235) 3600(2118) 3600(2118) 3400(2000) 3400(2000) 3200(1882) 3200(1882) 3100(1824) 3100(1824) 3000(1765) 3000(1765) 2800(1647) 2800(1647) 2600(1529) 2600(1529) 2400(1412) Rated Point 2400(1412) Rated Point Limit 2200(1294) 2200(1294) 2000(1176) 2000(1176) 1800(1059) Limit 1800(1059)
  • Page 52 40QSM060DS High Speed Maximum rpm(switch 4) Minimum rpm(switch 0) 1800 2300 2800 3300 3800 Air volume(m3/h) Low Speed Maximum rpm(switch 4) Minimum rpm(switch 0) 1800 2300 2800 3300 3800 Air volume(m3/h)

  • Page 53: Electric Characteristics

    8 Electric Characteristics Indoor Unit Model Voltage Min. Max. 40QTD018DS 50/60 208-230V 187V 253V 40QSM018DS 50/60 208-230V 187V 253V 40QZL018DS 50/60 208-230V 187V 253V 40QSS018DS 50/60 208-230V 187V 253V 40QTD024DS 50/60 208-230V 187V 253V 40QSM024DS 50/60 208-230V 187V 253V 40QZL024DS 50/60 208-230V 187V...

  • Page 54: Sound Level

    9 Sound Level 9.1 Indoor unit Concealed Duct Type Discharge Suction Duct Duct 1.4m Microphone Noise level dB(A) Model 40QSM018DS 40QSM024DS 40QSM036DS 40QSM048DS 40QSS018DS 40QSS024DS 40QSS036DS 40QSS048DS 40QSM060DS...
  • Page 55 1.4m Microphone Noise level dB(A) Model 40QTD018DS 40QTD024DS 40QTD036DS 40QTD048DS Microphone 1 . 5 m Air outlet side Microphone Noise level dB(A) Model 40QZL018DS 40QZL024DS 40QZL036DS 40QZL048DS 40QZL060DS...

  • Page 56: Outdoor Unit

    9.2 Outdoor unit Outdoor Unit Microphone 1.0m Note: H= 0.5 × height of outdoor unit Model Noise Level dB(A) 38QUA018DS 38QUA024DS 38QUA036DS 38QUA048DS 38QUA060DS...

  • Page 57: Accessories

    10 Accessories Ducted Units Name Shape Quantity Soundproof / insulation sheath Tubing & Fittings Binding tape Seal sponge Drain joint Drainpipe Fittings (for cooling & heating) Seal ring Wired controller & Its Frame Wired controller ， Owner s manual Others Installation manual Magnetic ring (twist the electric wires L EMS &...
  • Page 58 provided the following Remote controller holder accessories) Mounting screw(ST2.9×10-C-H) Remote controller manual Alkaline dry batteries (AM4) Owner's manual Others Installation manual Installation accessory Expansible hook (The product you have might not be provided the Installation hook following accessories Orifice Ceiling-floor Units 1.

  • Page 59: The Specification Of Power

    11 The Specification of Power Type Phase 1-phase 1-phase Power Frequency and Voltage 208-230V, 50/60Hz 208-230V, 50/60Hz Circuit Breaker/ Fuse (A) 25/20 40/30 Indoor Unit Power Wiring (mm Ground Wiring Indoor/Outdoor Outdoor Unit Power Wiring 3×2.5 3×2.0 Connecting Strong Electric Signal 4×1.0 4×1.5 Wiring...
  • Page 60 12 Field Wiring 18K, 24K 36K, 48K...

  • Page 62: Installation Details

    blockage of the heat exchanger in the 13 Installation Details outdoor unit.  If is built over the unit to prevent direct sunlight, rain exposure, direct strong wend, 13.1 Location selection snow and other scraps accumulation, make Indoor unit location selection 13.1.1 sure that heat radiation from the condenser ...
  • Page 63 Size of outline dimension mounted Insert the air filter through the filter slot and fix it plug Model with 2 screws. 40QSM018DS 37.80 13.78 40QSM024DS 37.80 13.78 1180 40QSM036DS 46.46 19.29 1240 40QSM048DS 48.82 19.69 40QSS018DS 36.22 13.2.1.6 Install the air duct 1140 Please design...
  • Page 64 ③ When install the filter mesh, please plug it into flange inclined from air return opening, and then push up. 13.2.2.2 Bolt pitch ④ The installation has finish, upon filter mesh which fixing blocks have been insert to the flange positional holes. 13.2.2.3 Install the pendant bolt Select the position of installation hooks 13.2.2...
  • Page 65 If the ceiling is extremely high, please determine the length of the installation hook depending on the real situation. 13.2.2.4 Install the main body Make the 4 suspender through the 4 hanger of the main body to suspend it. Adjust the 13.2.2.5 Install the panel hexangular nuts on the four installation hooks Remove the grille...
  • Page 66 inch 47.24 8.66 1565 48/60K inch 61.61 8.66 ② Wall-mounted installation Hang the air-in grill to the panel, then connect 13.2.3.3 Install the pendant bolt the lead terminator of the swing motor and that ① Ceiling installation control with corresponding Select the position of installation hooks terminators on the body respectively.
  • Page 67 13.2.4 Slim cassette indoor unit installation 13.2.4.1 Service space for indoor unit Locate the hanging arm on the hanging screw bolt. Prepare the mounting bolts on the unit. Put the side panels and grilles back. Capacity (Btu/h) >235 inch 8.07 >9.25 >275 inch...
  • Page 68 Select the position of installation hooks according to the hook holes positions showed in upper picture. Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then 13.2.4.5 Install the panel embed the expansible hooks (fittings). Remove the grille 13.2.4.4 Install the main body Make the 4 suspender through the 4 hanger of...

  • Page 69: Outdoor Unit Installation

    Tighten the screws under the panel hooks till the panel closely stick on the ceiling to avoid More than 60cm condensate water. (23.62in) 13.3.2 Bolt pitch For the value of A,B and D, please refer to Hang the air-in grill to the panel, then connect the dimension part.
  • Page 70 Considering the allowable pipe length and Flare dimension Pipe height drop to decide the installation position. Flare shape (mm) diameter Make sure the distance and height drop between indoor and outdoor unit not exceeded 1/4" 90 ° 4 the date in the following table. (6.35) Max.
  • Page 71 5) Turn on the vacuum pump to begin 3/4" (19) 990~1210 9270~11860 evacuation. 6) Conduct a 30-minute evacuation. Check 13.4.3 First-Time Installation whether the compound meter indicates Air and moisture in the refrigerant system -0.1Mpa(14.5Psi). If the meter does not cause the following problems: indicate -0.1Mpa(14.5Psi) after 30 minutes ●...
  • Page 72 After purging the air, use a torque wrench to 3) Place the charging cylinder onto the tighten the flare nut on the 2-way valve. electronic scale and record the weight. 4). Check for gas leaks. 4) Turn on the air conditioner in cooling mode. Check the flare connections for gas leaks.
  • Page 73 5). Turn on the air conditioner in cooling mode. 6). Disconnect the charge set and the charging Turn when gauge indicates cylinder, and open the 2-way and 3-way valves -0.1MPa(14.5Psi). Be sure to use a hexagonal wrench to operate 6).Immediately close the 3-way valve the valve stems.

  • Page 74: Drainage Pipe Installation

     Ensure at least 1/100 slope of the drainage Procedure: pipe 1). Connect the charge hose to the charging  Adopt suitable pipe diameter cylinder. Open the 2-way 3-way valve.  Adopt nearby condensate water discharge With the charge hose you disconnected from the vacuum pump, connect it to the valve at the 13.5.2 Key points of drainage water pipe bottom of the cylinder.
  • Page 75 Attention: Adopt PVC40 or bigger pipe to be the Drainage pipe Drain tee Drainage pipe Drainage pipe main pipe. Water flow Water flow Water flow Water flow Water flow For Vertical drainage pipe (The following Drain tee Drain tee Water flow Water flow table is for reference) Water flow...
  • Page 76 Hanger Down incline pipe A:Length of horizontal pipe ≤ 150mm B: Lift height ≤ the pump head of water pump Flexible pipe 300mm Blowhole setting  For the concentrated drainage pipe system, there should design a blowhole at the 2. Pump drainage mode highest point of main pipe to ensure the 2.1 Disconnect the plug of water level switch, condensate water discharge smoothly.

  • Page 77: Vacuum Drying And Leakage Checking

    drainage outlet. (In light of the length of Ice-blockage shall cause abnormal drainage pipe, water shall be discharged operation of system, while copper oxide about 1 minute delayed) shall damage compressor.  Eliminating the non-condensable gas (air) 2.3 Stop the operation of air conditioner, power in system to prevent the components off the power supply and put the cover of oxidizing, pressure fluctuation and bad heat...

  • Page 78: Additional Refrigerant Charge

     After the vacuum drying process is carried out, the additional refrigerant charge Special vacuum drying process needs to be performed. The special vacuum drying method shall be  The outdoor unit is factory charged with adopted when: refrigerant. additional refrigerant ...

  • Page 79: Engineering Of Electrical Wiring

     The insulation material at the joint pipe shall be banded to the gap pipe and liquid pipe Purpose of refrigerant pipe insulation  tightly. During operation, temperature of gas pipe  The linking part should be use glue to paste and liquid pipe shall be over-heating or together over-cooling extremely.

  • Page 80: Test Operation

      All field wiring construction should be The gas-side and liquid-side stop values finished by qualified electrician. are both opened.   Air conditioning equipment should be The air conditioner is pre-heated by turning grounded according to the local electrical on the power.

  • Page 81: Operation Characteristics

    14. Operation Characteristics Temperature Cooling operation Heating operation Drying operation Mode 0℃～30℃ 10℃～32℃ Room temperature 17℃～32℃(62℉～90℉) (32℉～86℉) (50℉～90℉) 0℃～50℃ (32℉～122℉) Outdoor temperature -15℃～30℃ （-15℃～50℃(5℉～122℉)：For (Entry level) (5℉～86℉) the models with low temperature 0℃～50℃ cooling system） (32℉～122℉) Outdoor temperature -25℃～30℃ -25℃～50℃(-13℉～122℉) (E-Star level) (-13℉～86℉) Outdoor temperature...

  • Page 82: Electronic Function

    15. Electronic Function 15.1 Abbreviation T1: Indoor room temperature T2: Coil temperature of indoor heat exchanger middle. T2B: Coil temperature of indoor heat exchanger outlet. T3: Coil temperature of condenser T4: Outdoor ambient temperature 15.3 Main Protection T5: Compressor discharge temperature 15.3.1 Three minutes delay at restart for Td: Target temperature compressor...

  • Page 83: Operation Modes And Functions

    15.3.5 Inverter module protection ---0° C(32° F)≦T2<4° C(39.2° F), the compressor The Inverter module has a protection function frequency will be limited and decreased to the about current, voltage and temperature. If these lower level protections happen, the corresponding code ---4°C(39.2°F)≤T2≤7°C(44.6°F), will display on indoor unit and the unit will stop compressor will keep the current frequency.
  • Page 84 The indoor fan is controlled as below: Auto fan action in heating mode: Setting fan T1-Td+1.5° C(34.7° F) T1-Td ℃(° F) Actual fan speed speed H+(H+=H+G) 4.5(40.1) H（=H） 0.0° C(32° F) 3.0(37.4) (H+-L)*0.2+L -1° C(30.2° F) H-（H-=H-G) 1.5(34.7) (H+-L)*0.4+L -2° C(28.4° F) M+(M+=M+Z) 4.5(40.1) -3°...
  • Page 85 15.4.3.5 Evaporator coil temperature protection 15.4.6 Timer function 15.4.6.1 Timing range is 24 hours. 15.4.6.2 Timer on. The machine will turn on automatically when reaching the setting time. TEstop 15.4.6.3 Timer off. The machine will turn off Decrease automatically when reaching the setting time. TEdown 15.4.6.4 Timer on/off.
  • Page 86 The indoor unit is equipped with auto-restart 15.4.10 8℃ Heating(optional) function, which is carried out through an In heating operation, the preset temperature of auto-restart module. In case of a sudden power the air conditioner can be as lower as 8 ℃ failure, the module memorizes the setting (46.4°...
  • Page 87 15.4.12 Point check function Press the LED DISPLAY or LED or MUTE button of the remote controller three times, and then press the AIR DIRECTION or SWING button three times in ten seconds, the buzzer will keep ring for two seconds.
  • Page 88 Enquiry Display value Meaning Remark information T1,T2,T3,T4, -1F,-1E,-1d,-1c,- -25,-24,-23,-22,-21,-2 1. All the displaying temperature is actual T2B,TP,TH, 1b,-1A value. Targeted -19—99 -19—99 2. All the temperature is ° C no matter what A0,A1,…A9 100,101,…109 Frequency, kind of remote controller is used. b0,b1,…b9 110,111,…119 Actual...

  • Page 89: Troubleshooting

    16. Troubleshooting Safety Electricity is stored in capacitors, even when the power supply is shut off. Do not forget to discharge the electricity in the capacitors. Electrolytic Capacitors (HIGH VOLTAGE! CAUTION!) For other models, For other models, connect a discharge resistor (approx.100Ω 40W) or a soldering iron plug between the + and - terminals of the electrolytic capacitor on the opposite side of the outdoor printed circuit board (PCB).

  • Page 90: Indoor Unit Error Display

    16.1 Indoor Unit Error Display Operation Timer lamp Display LED STATUS lamp ☆ 1 time Indoor unit EEPROM parameter error Communication malfunction between indoor and ☆ 2 times outdoor units ☆ 4 times Indoor fan speed malfunction ☆ 5 times Indoor room temperature sensor (T1 ) malfunction ☆...

  • Page 91: Outdoor Unit Error Display

    16.2 Outdoor unit error display For 18K-24K outdoor unit: LED2 LED1 Problems IU display (Green) (Red) standby for normal Operation normally ☆ Compressor drive board EEPROM error ☆ IPM malfunction or IGBT over-strong current protection Over voltage or too low voltage protection ☆...

  • Page 92: Outdoor Check Function

    Outdoor check function Display Remark Display running frequency, running state or malfunction Normal display code Actual data*HP*10 If capacity demand code is higher than 99, the digital display tube will show single digit and tens digit. (For example, the Indoor unit capacity demand code digital display tube show “5.0”,it means the capacity demand is 15.
  • Page 93 Bit4 Frequency limit caused by T2. Bit3=1, Bit1=1. It means frequency Bit3 Frequency limit caused by T3. limit caused by T4, Bit2 Frequency limit caused by T5. T3 and current. Frequency limit caused by Bit1 current Frequency limit caused by Bit0 voltage DC fan motor speed...

  • Page 94: Diagnosis And Solution

    16.3 Diagnosis and Solution 16.3.1 EEPROM parameter error diagnosis and solution (E0/F4) E0/F4 Error Code Malfunction conditions Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip. Potential causes Installation mistake ● Faulty PCB ● Trouble shooting: Power off, then restart the unit 2 minutes later.
  • Page 95 16.3.2 Communication malfunction between indoor and outdoor units diagnosis and solution (E1) For 18K-24K: Error Code Malfunction conditions If the indoor unit does not receive feedback from outdoor unit for 110 seconds 4 consecutive times. Potential causes Wiring mistake ● Faulty indoor or outdoor PCB ●...
  • Page 96 Remark: Use a multimeter to test the DC voltage between 2 port and 3 port of outdoor unit. The red pin of multimeter connects with 2 port while the black pin is for 3 port. When AC is normal running, the voltage will move alternately between -50V to 50V.
  • Page 97 For 36K-48K: Malfunction Indoor unit does not receive feedback from outdoor unit for 60 conditions seconds OR outdoor unit does not receive feedback from indoor unit for 120 seconds. ● Wiring mistakes Possible causes ● Faulty indoor or outdoor PCB E1 displayed E1 displayed Communication malfunction between indoor...
  • Page 98 16.3.3 Fan speed malfunction diagnosis and solution (E3) Error Code Malfunction conditions When indoor fan speed is too low (300RPM) for a certain period of time, the unit ceases operation and the LED displays a failure code. Potential Causes Wiring mistake ●...
  • Page 99 Index 1: 1. Indoor DC fan motor (Control Chip is in Fan Motor) Turn power on and while the unit is on standby, measure the voltage between pin1 and pin3 as well as between pin4 and pin3 in fan motor connector. If the value of the voltage is not within the range shown in the following table, the PCB may be experiencing problems and need to be replaced.
  • Page 100 16.3.4 Open or short circuit of temperature sensor diagnosis and solution (E4/E5/F1/F2/F3) Error Code E4/E5/F1/F2/F3 Malfunction conditions If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays a failure. Potential causes Wiring mistake ● Faulty sensor ●...
  • Page 101 16.3.5 Refrigerant Leakage Detection diagnosis and solution (EC) Error Code Malfunction conditions Define the evaporator coil temperature T2 of the compressor starts running as Tcool. If the following occurs 3 times, the display shows "EC" and the unit switches off: In the first 8 minutes after the compressor starts up, if T2 ＜...
  • Page 102 Water-level alarm malfunction 16.3.6 diagnosis and solution Error Code Malfunction conditions If the sampling voltage is not 5V, the LED will display the failure code. ● Wiring mistakes Possible causes ● Faulty water-level switch ● Faulty water pump ● Faulty indoor PCB Power off, then restart the unit 3 minutes Power off, then restart the unit 3 minutes later.
  • Page 103 16.3.7 IPM malfunction or IGBT over-strong current protection diagnosis and solution (P0) Error Code Malfunction When the voltage signal the IPM sends to the compressor drive conditions chip is abnormal, the display LED shows “P0” and the AC turn off. Possible causes Wiring mistake ●...
  • Page 106 16.3.8 Over voltage or too low voltage protection diagnosis and solution (P1) Error Code Malfunction conditions Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit. Potential causes Power supply issues ● System leakage or blockage ●...
  • Page 107 16.3.9 High temperature protection of compressor top diagnosis and solution (P2) Error Code Malfunction decision If the sampling voltage is not 5V, the LED will display the failure. conditions Power supply problems. ● Supposed causes System leakage or block ● PCB faulty ●...
  • Page 108 High temperature protection of IPM board diagnosis and solution (P2) High temperature protection of IPM High temperature protection of IPM board board Check whether the radiator Check whether the radiator Fix the radiator well Fix the radiator well is fixed well ? is fixed well ? Check whether electronic Check whether electronic...
  • Page 109 16.3.10 Inverter compressor drive error diagnosis and solution(P4) Error Code Malfunction conditions Abnormalities in the inverter compressor drive is detected by a special detection circuit, which can perform communication signal detection, voltage detection, and compressor rotation speed signal detection. Potential causes Wiring mistake ●...

  • Page 110: Main Parts Check

    16.3.11 Outdoor IPM module temperature sensor malfunction diagnosis and solution (P7) Error Code Malfunction conditions If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays a failure. Potential causes Wiring mistake ● Faulty sensor ● Faulty PCB ●...
  • Page 111 Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4 (℃--K) ℃ ℉ ℃ ℉ ℃ ℉ ℃ ℉ K Ohm K Ohm K Ohm K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865...
  • Page 112 Appendix 2 Temperature Sensor Resistance Value Table for T5,TH (℃--K) ℃ ℉ ℃ ℉ ℃ ℉ ℃ ℉ K Ohm K Ohm K Ohm K Ohm 542.7 68.66 13.59 3.702 511.9 65.62 13.11 3.595 62.73 12.65 3.492 455.9 59.98 12.21 3.392 430.5 57.37...
  • Page 113 Appendix 3: ℃ 10 11 12 13 14 15 16 17 18 19 20 21 22 ℉ 48 50 52 54 56 58 60 62 64 66 68 70 72 ℃ 23 24 25 26 27 28 29 30 31 32 33 34 35 ℉...
  • Page 114 2. Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value ASN98D22UFZ ASM135D23UFZ ATF235D22UMT ATF250D22UMT ATF310D43UMT ATQ420D1UMU ATM115D43UFZ2 Blue - Blue - 1.57Ω 1.75 Ω 0.75 Ω 0.75 Ω 0.65 Ω 0.38Ω 1.87Ω Black Red - Blue...
  • Page 115 3. IPM continuity check Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N. Digital tester Normal resistance value Digital tester Normal resistance value (+)Red...
  • Page 116 Heating Chart: HEATING MODE Outdoor temp. ℉ Indoor (℃) Temp. 57 (13.89) 47 (8.33) 37 (2.78) (-2.78) (-8.33) 30.3 28.5 25.3 22.8 20.8 32.5 30.0 26.6 25.4 23.3 33.8 31.5 27.8 26.3 24.9 3.03 2.85 2.53 2.28 2.08 3.25 3.00 2.66 2.54 2.33...

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