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Frigicoll MQ4G-36HAN1 Installation & Owner's Manual

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INSTALLATION & OWNER'S
MANUAL
Four-Way Cassette 840x840
MQ4G-36HAN1 SKU (KCIM-100 DN11)
MQ4G-48HAN1 SKU (KCIM-140 DN11)
Original Manual
Read this manual carefully before using the product, and keep it for future
reference.
All the pictures in this manual are for illustration purpose only.
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Summary of Contents for Frigicoll MQ4G-36HAN1

  • Page 1 INSTALLATION & OWNER'S MANUAL Four-Way Cassette 840x840 MQ4G-36HAN1 SKU (KCIM-100 DN11) MQ4G-48HAN1 SKU (KCIM-140 DN11) Original Manual Read this manual carefully before using the product, and keep it for future Scan the QR code to Multi-languages reference. read the manual in All the pictures in this manual are for illustration purpose only.

  • Page 3: Table Of Contents

    Contents About The Documentation About This Document / 1 Safety Instructions / 2 Safety Warning Safety Precautions / 4 Electric Safety Requirements / 5 About The Refrigerant / 6 Operation Operation Precautions / 9 Optimum Operation / 10 Display Panel / 13 Symptoms That Are Not Faults / 11 Disposal / 14 Installation...

  • Page 4: About The Documentation

    About The Documentation About This Document NOTE Make sure that the user has the printed documentation and ask him/her to keep it for future reference. Target audience Authorised installers + end users NOTE This appliance is intended to be used by expert or trained users in shops, in light industry, and on farms, or for commercial and household use by lay persons.

  • Page 5: Safety Instructions

    Safety Instructions Please thoroughly read and ensure that you fully understand the safety precautions (including the signs and symbols) in this manual, and follow relevant instructions during use to prevent damage to health or property. Safety Signs Indicates a hazard with a high level of risk which, if not avoided, will result in DANGER serious injury.
  • Page 6 DANGER Any person who is involved with working on or breaking into a refrigerant circuit should hold a current valid certificate from an industry-accredited assessment authority, which authorises their competence to handle refrigerants safely in accordance with an industry recognised assessment specification. Servicing shall only be performed as recommended by the equipment manufacturer.

  • Page 7: Safety Warning

    Safety Warning WARNING CONTENTS Ensure Proper Earthing Professional Only PROHIBITION SIGNS No Laying No Strong Currents No Open Flame; No Acid or Inflammable Thing Fire, Open Ignition Alkali Materials Source and Smoking Prohibited Safety Precautions DANGER In the event of refrigerant leakage, smoking and open flames are prohibited. Disconnect the main power switch immediately, open windows to allow ventilation, keep away from the leakage point, and contact your local dealer or technical support to request a professional repair.

  • Page 8: Electric Safety Requirements

    CAUTION This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance.

  • Page 9: About The Refrigerant

    About The Refrigerant WARNING The following applies to R32 refrigerant systems. Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized. For repair to the refrigerating system, the following precautions shall be complied with prior to conducting work on the system.
  • Page 10 During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked upon prior to any removal of sealed covers, etc. If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operating form of leak detection shall be located at the most critical point to warn of a potentially hazardous situation.
  • Page 11 i) Do not exceed the maximum working pressure of the cylinder, even temporarily. j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equipment are removed from site promptly and all isolation valves on the equipment are closed off. k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.

  • Page 12: Operation

    Operation Operation Precautions WARNING If the unit will be not used for a long time, disconnect the main power switch. Otherwise, an accident may occur. The installation height of the air conditioner shall be at least 2.5m above the ground to avoid the following risks: 1.

  • Page 13: Optimum Operation

    CAUTION Do not dispose of this product as unsorted municipal waste. Collection of such waste separately for special treatment is necessary. Do not dispose of electrical appliances as unsorted municipal waste, use separate collection facilities. Contact your local government for information regarding the collection systems available. If electrical appliances are disposed of in landfills or dumps, hazardous substances can leak into the groundwater and get into the food chain, damaging your health and well-being.

  • Page 14: Operating Range

    Operating Range Use the unit in the following temperature and humidity ranges for safe and effective operation. Indoor 16~32°C temperature ≤80% Cooling Indoor (When the humidity exceeds 80%, long-time operation of the indoor unit may cause dew humidity condensation on the surface of the indoor unit, generate mist-like cold air from the air outlet or water dripping out of the unit.) Indoor Heating...
  • Page 15 The Following Symptoms Are Not System Malfunctions The following phenomena are normal during operation of the air conditioner. They can be solved according to the instructions below or do not need to be solved. ■ The indoor unit emits white mist ① When humidity is high during cooling mode, white mist may appear due to the humidity and the temperature difference between the air inlet and outlet.

  • Page 16: Display Panel

    ■ In winter, the outdoor temperature is low, and heating effects may be decreased ① In heating mode, the air-conditioning system absorbs heat from the outdoor air and releases heat to the indoor side. When the outdoor temperature is low, less heat is released. This is the principle of heat pump. ② When the outdoor temperature is extremely low, the heating capacity of the air conditioner decreases, and other heating equipment may need to be added.

  • Page 17: Disposal

    Disposal Components and accessories from the units are not part of ordinary domestic waste. Complete units , compressors, motors etc. are only to be disposed of via qualified disposal specialists. This unit uses hydrofluorocarbon which is only be disposed of via qualified disposal specialists.

  • Page 18: Installation

    Installation Carefully read this manual before installing the indoor unit. Installation Precautions WARNING Make sure to carry out the installation according to local legislation. Ask your local dealer or professionals to install the product. This unit must be installed by pqualified persons. Users MAY NOT install the unit themselves; otherwise, faulty operations may cause the risks of fire, electrical shock, injury, or leakage, which could harm you or others or damage the air conditioner.
  • Page 19 Make sure the installation base and lifting are robust and reliable; Insecure installation of the base may cause the air conditioner to fall, leading to an accident. Take into full consideration the effects of strong winds, typhoons and earthquakes, and reinforce the installation.
  • Page 20 Precautions For Transporting And Lifting The Air Conditioner Before transporting the air conditioner, determine the path that will be used to move it to the installation site. Do not unpack the air conditioner until it is transported to the installation site. When unpacking and moving the air conditioner, must hold the Lifting Lugs and do not apply force to other parts, especially the refrigerant piping, drain pipe and plastic accessories, so as to avoid damaging the air conditioner and causing personal injury.
  • Page 21 Recommended Installation Sites It is recommended to install the air conditioner according to the design drawing of the HVAC engineer. The selection principle for the installation site is as follows: Ensure that the airflow in and out of the indoor unit is reasonably organized to form an air circulation in the room. Prevent the air conditioner from blowing directly at the human body.
  • Page 22 Layout Installation layout ① Indoor unit ② Panel (optional) ③ Air outlet ④ Fresh air inlet ⑤ Drain pipes ⑥ Liquid pipe *Power cable and earth ⑦ Gas pipe ⑧ ⑨ *Connection wires wires ⑩ Wired controller (optional) ⑪ Remote controller (optional) ⑫...

  • Page 23: Product Dimensions

    Product Dimensions (Unit: mm) 4-M4 Φ10 Φ105 (Fresh air inlet) 122.5 950 (with panel) Side air outlet (available for four sides) Φ23 (internal diameter) Suspension bolt Drain pipe Φ25 (OD) E: Connect to refrigerant piping (liquid side) Hex nut (to adjust level) 140 (the thickness of panel sealing F: Connect to refrigerant sponges is reduced...

  • Page 24: Installation Materials

    Installation Materials Accessories List of accessories Installation And Operation Flare Nut X 2 Cable Tie X 4 Thermal Insulation Pipe X Cardboard X 1 Manual X 1 For use in the installation of To tighten the drain hose Used to determine the (Make sure to hand it over connecting pipe tightly to the drainage...
  • Page 25 Locally Purchased Accessories List of accessories Copper Pipe PVC Water Drain Pipe Thermal Insulation Pipe E xpansion Bolt (M10)x4 Suspension Bolt (M10)x4 Used to connect the Used to drain the condensed Used to prevent pipe Used to install the indoor Used to install the indoor indoor refrigerant water from the indoor unit.

  • Page 26: Preparations Before Installation

    Preparations Before Installation Unpacking Check ① After unpacking, check whether the packing materials are in good condition, The red dot bulges whether the accessories that come with the product are complete, whether Sealing the air conditioner is intact, whether the surfaces of the heat exchanger and other parts are not worn, and whether there are oil stains on the stop valves of the unit.
  • Page 27 Determine The Positions Of The Ceiling Opening, The Unit And The Suspension Bolts Cut a hole with a size of 910mm x 910mm. (Unit: mm) Shape cutting of the mounting cardboard Lifting lug hole 4-Φ12 788 (suspension bolt distance) 798 (cardboard fixing hole) 840 (indoor unit size) 910±5 (ceiling opening dimension) Indoor unit...
  • Page 28 When installing the indoor unit on a new ceiling, affix cardboard to the indoor unit as a reference to determine the size, location, and center of the ceiling opening. NOTE Evenly adjust the four hex nuts to make sure that the indoor unit is level. The horizontal distance of the overlapping part of the ceiling and panel must be more than 10mm.

  • Page 29: Indoor Unit Installation

    Indoor Unit Installation WARNING Install the air conditioner in a location with sufficient strength to support the weight of the unit. Take reinforcement measures when necessary. Ensure that appliance is mounted securely. The unit may fall and cause personal injury if the location is not strong enough. Unstable installation may cause the unit to fall and cause an accident.
  • Page 30 Indoor unit Installation Existing ceiling (the ceiling surface needs to be level) Cut a 910mm × 910mm square hole on the ceiling according to the shape of the mounting cardboard (see the figure below). a. The center of the ceiling opening is the same as the center of the indoor unit of the air conditioner. b. Determine the lengths and outlets of connecting pipe, drain pipe, and electrical wiring. c.
  • Page 31 After adjusting the indoor unit position and level, tighten the nuts on the mounting hook to secure the air conditioner in place. Tighten the upper and lower nuts For units with fresh air functions, before installing indoor units: 1. Use diagonal pliers to remove the knockout at the fresh air unit at one side of the unit in advance.
  • Page 32 Expansion flanges (four) Expansion unit knockout (four) Flange connecting screws (4-M4) NOTE An expansion flange may be round or rectangular depending on the customer's needs. Please contact your agent for detail infomation. New rooms and new ceilings For the installation of suspension bolts, a hook can be embedded in the new room. Make sure the hook can withstand 4 times the weight of the indoor unit and will not loosen due to shrinkage of the concrete.

  • Page 33: Panel Installation

    Drainage pipe Transparent rubber hose for determining the unit level Panel Installation Remove the air inlet grille Press the two grille clamps at the same time to lift it. Auxiliary buckle Display panel (inner) Grille clamp Panel Louver Air inlet grille Mounting cover Raise the air inlet grille to about 45°...

  • Page 34: Install The Panel

    NOTE The panel should be placed facing upwards and placed on a flat surface, otherwise it is prone to deformation, which may cause air leakage or even water dripping. Do not squeeze the louver. Remove the mounting cover at the four corners, take out the lanyards of the installation frame from the inner hooks at the corners of the panel, and take out the mounting cover outwards, as shown in the following figure.
  • Page 35 NOTE Do not squeeze the display panel cable between the indoor unit and panel. Pre-fasten the panel: Screw the locking screws at four corners of the display panel by about 5mm (the panel will rise by 5mm accordingly). Rotate to adjust the display panel so that it can cover the entire ceiling hole. Tighten the four locking screws till the thickness of the sealing material between the panel and the indoor unit is compressed to 10–15mm, as shown in the figure below.

  • Page 36: Install The Filter

    Install the filter To replace the G1 primary filter, press the buckles inwards in four directions, and then remove the G1 primary filter from the air inlet grille. G3 filter and F6 filter are directional, including the airflow direction and mounting bracket direction. The mesh side is near the fan.
  • Page 37 Install the air inlet grille Tilt the air inlet grille to 45°, and insert the suspension hooks into the hook holes around the panel. The air inlet grille can be installed at four directions, but only two directions provide structures to install the lanyards. Lanyard can be fastened to the air inlet grille hook.
  • Page 38 Install the mounting covers and the display panel Attach the lanyard to the panel. Hook Fix three mounting covers to the panel according to the figure. Fasten all the buckles, fully assemble the mounting covers with the panel. Push the buckles enter the buckle holes NOTE Do not clamp the lanyard when fitting the cover plate.

  • Page 39: Refrigerant Connecting Piping Installation

    Refrigerant Connecting Piping Installation When connect different series of outdoor units, the length and level differences of piping connections. Refer to the Installation and Operation Manual of the outdoor unit. CAUTION The installation of pipe-work shall be kept to a minimum. During the installation of the connecting pipes, do not allow air, dust, and other debris to penetrate the piping system, and make sure the interior of the pipes is dry.

  • Page 40: Pipe Connection

    Pipe Connection Steps CAUTION Do not let the interface of the indoor unit bear Bend and arrange pipes carefully the weight of the connecting pipe; otherwise, the without damaging the pipes and their connecting pipe may be crushed and deformed, insulating layers.
  • Page 41 Flaring Slope Rough Burrs 90° To cut the piping with a pipe cutter, rotate the pipe cutter repeatedly. Put the pipe into the connecting nut flaring, and both the gas pipe and liquid pipe of the indoor unit are connected by flaring. Pipe cutter 90°±4 A (mm)

  • Page 42: Vacuum Pumping

    Protective nut Indoor unit pipe Piping Flare nut CAUTION When flared joints are reused indoors,the flare part should be re-fabricated. Pipe size (mm) Tightening torque [ N.m (kgf.cm)] Φ6.35 14.2–17.2 (144–176) Φ9.52 32.7–39.9 (333–407) Φ12.7 49.5–60.3 (504–616) Φ15.9 61.8–75.4 (630–770) Φ19.1 97.2–118.6 (990–1210) CAUTION...

  • Page 43: Leak Detection

    Leak Detection The leak test must satisfy the specifications of EN378-2. To check for leaks: Vacuum leak test ① Evacuate the system from the liquid and gas piping to –100.7 kPa (–1.007 bar)(5 Torr absolute) for more than 2 hours. ②...

  • Page 44: Insulation Treatment

    CAUTION Cylinders shall be kept upright if a siphon tube is present. Insulation Treatment Pipes on the liquid and air sides have a low temperature during cooling. Take sufficient insulation measures to prevent condensation. ■ Be sure to use a thermal insulation material with a heat resistance of 120°C or higher for the gas pipe.
  • Page 45 Installation Of Water Drain Pipe For The Indoor Unit The drain pipe can be connected to the water pump outlet by using a PVC pipe, and fastening it with a cable tie. Then push the thermal insulation pipe to be closely attached to the indoor unit, and finally fasten the end with a cable tie.
  • Page 46 Direction Slope of 1/100 Consistent with the Direction direction of water discharge When connecting the drain pipe, do not pull the drain pipe forcefully, or it may become loose. The lateral length of the drain pipe should be within 20m, and a support point should be set every 0.8– 1.0m to avoid air resistance caused by the deformation of the drain pipe.
  • Page 47 • Connection method of the drain pipe: Discharge (Unit: mm) Slope > 1/100 The net height of the drain 800~1000 pipe ≤ 1200 Method to connect the drain pipe for a single unit Discharge 50~100 50~100 The net height of the drain pipe ≤ 1200 Water outlet Main water outlet pipe...
  • Page 48 Water Drainage Test Before the test, make sure that the water drain piping is smooth, and check that each connection is properly sealed. Conduct the water drainage test in a new room before the ceiling is plastered. The drain pipes for indoor units may use a Drain pipe Test water outlet PVC pipe (outer diameter: 25mm).

  • Page 49: Electrical Connection

    Electrical Connection DANGER The power supply must be cut off before any electrical work is carried out. Do not conduct electrical work when the power is on; otherwise, it may cause serious personal injury. The air conditioning unit must be earthed reliably and must meet the requirements of the local country/ region.

  • Page 50: Electrical Characteristics

    Electrical Characteristics Electric Specifications Of The Indoor Unit Indoor Fan Motor Capacity Frequency Voltage Rated Motor Output (kW) (Hz) 0.51 0.51 0.59 0.59 0.94 220~240 1.05 1.09 10.0 0.95 11.2 1.18 14.0 1.41 NOTES: MCA: Min. Circuit Amps. (A), which is used to select the minimum circuit size to ensure safe operation over a long period of time.
  • Page 51 Schematic Figure Of The Main Terminal Blocks Of Main Control Board CN22 CN10 CN18 CN55 Switch module Terminals of remote switch M1 M2 D1(X) D2(Y) signal Power supply cable and earth Terminals of communication wiring Terminals of strong Alarm signal line terminals current sterilization output...

  • Page 52: Power Supply Cable Connection

    Cable clamp for Cable clamp for communication power supply cable wiring and display box and earth wires communication wiring CAUTION Power supply cable must be routed separately from the other cable such as communication wiring and display box communication wiring. The strong and weak current wires must be separated.
  • Page 53 CAUTION Do not bond and connect the power supply cable. Bonding and connecting the power supply cable may cause it to heat up, resulting in a fire. The power supply cable must be crimped reliably If it fails to crimp the insulated circular terminal using an insulated circular terminal block, and block due to on-site limitations, connect the power then connected to the power supply terminal of the...
  • Page 54 ② Power supply cable system connection Power supply cable system connection depends on the methods of communication between the indoor unit and outdoor unit. For the HyperLink (M1M2) communication method, indoor units are allowed to have independent power supplies. For other communication methods, indoor units should be provided with uniform power supplies.
  • Page 55 Indoor units are provided with unified power supply*, which are wired as follows: 1. HyperLink (M1M2) communication with the unified power supply: Power supply for indoor unit L1+La+Ln ≤ 2000m Wire diameter: 0.75mm2 Communication wires × × × × Circuit breaker Power supply cable Distribution box Distribution box Master...

  • Page 56: Communication Wiring Connection

    CAUTION When the indoor units are provided with a unified power supply, if the indoor units in the same refrigerant system are V8 indoor units, then indoor units and outdoor unit can communicate either via HyperLink (M1M2) with a unified power supply, or via P/Q. If some of the indoor units in the same refrigerant system are non-V8 series, then indoor units and outdoor unit can only communicate via P/Q/E communication.
  • Page 57 ② Table of selection of communication wiring diameter One controller to one indoor One-to-more unit (Two (centralized Function Indoor unit and outdoor unit communication controllers to controller) one indoor unit) Communication Communication HyperLink HyperLink P/Q/E (M1M2) (M1M2) communication communication communication communication X1X2 D1D2...
  • Page 58 ③ Indoor unit and outdoor unit communication HyperLink (M1M2) communication (with independent power supply) Single unit: HyperLink (M1M2) communication is a new type of indoor unit and outdoor unit communication technology. When the indoor units are provided with independent power supplies, use 2×1.5mm2 communication cables. M1 and M2 ports are located at terminal block "CN10" of the main control board. There is no distinction between negative and positive electrodes. For details, see the following figure: CN10 Main control...
  • Page 59 CAUTION If the total length is less than or equal to 200m and the total number of indoor units is less than or equals to 10 sets, the electronic expansion valve in indoor unit can be powered and controlled by the master outdoor unit.
  • Page 60 System: The HyperLink (M1M2) communication wiring with a unified power supply between indoor unit and outdoor unit can reach a length of up to 2000 meters, supporting any topology connection. The following figure shows a serial connection: Power supply for indoor unit Communication wires ×...
  • Page 61 System: The maximum total length of the P/Q communication cable of the Indoor unit and outdoor unit can be up to 1200m, and can be connected in serial, as shown in the figure below: Power supply for indoor unit Communication wires ×...
  • Page 62 CAUTION When P/Q or P/Q/E communication is used, the indoor units need to be powered uniformly. Either P/Q, P/Q/E communication or HyperLink (M1M2) communication can be selected. If it is required for indoor units to have independent power supplies, then HyperLink (M1M2) communication must be selected.
  • Page 63 ⑤ D1D2 communication wiring connection (limited to outdoor unit and system configuration) Achieving one-to-multiple and two-to-multiple functions of the indoor unit wired controller through D1D2 communication (a maximum of 16 sets) D1D2 communication is 485 communication. The one-to-more and two-to-more functions of the indoor unit wired controller can be achieved through D1D2 communication, as shown in the figure below: Indoor unit 16# Indoor unit 1#...
  • Page 64 External boards connection (limited to outdoor unit and system configuration) The external boards are a connection module outside the main control board, including a display box, Switch module, 1# Expansion board and 2# Expansion board. ① Connection of Display Panel The display panel is connected to the main control board through a 4-core cable, and is connected to the "CN30" socket of the main control board, as shown in the following figure: CN30...

  • Page 65: Remote On/Off Control

    Alarm signal and Sterilization module Refer to the following figure for the wiring of alarm signal and Sterilization module. Main CN22 control Output voltage: 220 VAC; board Maximum output power: 220 W CAUTION Strong current sterilization module The output voltage is 220-240V~. Alarm signal output Output voltage: 220 VAC;...
  • Page 66 The power cord passes through the sealing plate's outlet hole and connects to the main control board's live wire, neutral wire, and earth wire, ensuring that the length of the earth wire is greater than that of the live and neutral wires, and then use a cable clamp to secure it.

  • Page 67: Error Codes

    Error Codes Error Codes And Definitions The error code is displayed on the display box and the wired controller display. Definition Error code Digital display Emergency stop R32 refrigerant leaks, DANGER requiring shutdown immediately Outdoor unit fault Interlocking control Heat Recovery Ventilation Unit fault( in-series application) The Humidity Unit fault Interlocking control Heat Recovery Ventilation Unit fault(non-serial application) The AHU Kit slave unit fault...
  • Page 68 Definition Error code Digital display Abnormal communication between the indoor unit and outdoor unit Abnormal communication between the indoor unit main control board and fan drive board Abnormal communication between the indoor unit and wired controller Abnormal communication between the indoor unit and Wi-Fi Kit Abnormal communication between the indoor unit main control board and display board Abnormal communication between the AHU Kit slave unit and master unit...
  • Page 69 Definition Error code Digital display T1 (Indoor unit return air temperature sensor) short-circuits or cuts off The built-in room temperature sensor of the wired controller short-circuits or cuts off The wireless temperature sensor short-circuits or cuts off The external room temperature sensor short-circuits or cuts off Tcp (pre-cooled fresh air temperature sensor) short-circuits or cuts off Tph (pre-heated fresh air temperature sensor) short-circuits or cuts off TA (outlet air temperature sensor) short-circuits or cuts off...
  • Page 70 Definition Error code Digital display Address code not detected Motor failed more than once IPM (fan module) overcurrent protection Instantaneous overcurrent protection for phase current Low bus voltage fault High bus voltage fault Phase current sample bias error Motor and indoor unit are unmatched IPM and indoor unit are unmatched Motor startup failure Motor blocking protection...
  • Page 71 CAUTION Error codes are displayed only for certain outdoor unit models and indoor unit configurations (including the wired controller and display box). When the main control program is being upgraded, make sure that the indoor unit and outdoor unit remain powered on.

  • Page 72: Settings

    Settings ESP Setting Use the bi-directional communication wired controller (for example, WDC3-86S) to set the unit external static pressure: Constant speed mode The bi-directional communication wired controller must be used to set the unit's external static pressure parameters to overcome the air outlet resistance. The steps are as follows: ①...
  • Page 73 Static pressure setting parameter table Unit power Static pressure settings W*100 Level 0 Level 1 Level 2 Level 3 Level 4 Level 5 Level 6 Level 7 Level 8-19 28 (1.0HP) 36 (1.2HP) 45 (1.7HP) 56 (2.0HP) 71 (2.5HP) 80 (3.0HP) 90 (3.2HP) 100 (3.6HP) 112 (4.0HP)

  • Page 74: Test Run

    Test Run Checklist Before Test Run After the installation of the unit, check the items listed below first. CAUTION Do not power on the system. Pass/Fail Check list Read the complete installation and operation manual. Installation Check that the units are properly installed, to avoid abnormal noises and vibrations when starting up the units.

  • Page 75: Indoor Unit

    Pass/Fail Check list Components damage Check for damaged components and extruded piping inside the unit. Consistency Check between Refrigeration Pipelines and Communication Lines Check and confirm that the refrigerant piping and communication lines connected to the indoor and outdoor units are belong to the same refrigeration system. Oil leak Check if there is oil leaking from the compressor and piping.

  • Page 76: Maintenance And Service

    Maintenance And Service Safety Warning WARNING For safety reasons, always turn off the air conditioner and turn off the power before cleaning the air conditioner. Do not disassemble or repair the air conditioner by yourself; otherwise, it may cause fire or other hazards. Only professional service personnel can carry out the maintenance.
  • Page 77 Procedure Remove the air inlet grille. Press the two grille clamps at the same time, and pull down the air inlet grille to about 45°, and remove the grille. Mounting cover Air inlet grille Louver Panel Grille clamp 45° Auxiliary buckle Display panel (inner)

  • Page 78: Maintenance

    Cleaning Air Outlets And Exterior Panels Wipe the air outlet and panel with a dry cloth. If a stain is hard to remove, clean it with clean water or neutral detergent. CAUTION Do not use gasoline, benzene, volatile agents, decontamination powder or liquid insecticides. Otherwise, the air outlet or panel may become discolored or deformed.

  • Page 79: Service

    Service Step To Dismantle The Electric Control Board and Room Temperature Sensor Open the air inlet grille. Press the two grille clamps of the air inlet grille, and open the grille downwards. Open the air inlet grille to about 45°, release the lanyards, and push the grille towards the unit direction to detach the grille from the panel.
  • Page 80 Step To Dismantle The Fan Follow the steps above to remove the electric control board and the electric control board support. Loosen the four screws on the right and remove Remove the nuts with flat washers and the fan clip the sheet metal of the electric control box;...
  • Page 81 Step To Dismantle The Evaporator And Temperature Sensor Follow the steps above to remove the air inlet grille (recover refrigerant before repairing the evaporator). Remove the three mounting covers and display Loosen the locking screws at four corners and panel at four corners. remove the hooks at four corners of the panel from Exert pulling force from the position the indoor unit.
  • Page 82 First remove the screws (three) connecting the electric control box and the sealing plate, and then remove the screws (four) of the wire clip and the screw (one) of the electric control box. Connection between the electric control box assembly and sealing plate Wire clip Screw (three)
  • Page 83 Remove the connecting pipes of indoor unit and After removing three fixing screws, remove the outdoor unit and unscrew the two screws of the evaporator fix board. Then remove the evaporator. sealing plate of the piping to remove the plate. Screw (three) Connecting pipes of the...
  • Page 84 Step To Dismantle The Water Pump Follow the steps above to remove the air inlet grille, electric control box cover, wires, panel, electric control box, air guide ring, and drain pan. Unplug the drain pipe. After removing the two fixing screws, the pump can be taken out for replacement or maintenance. Remove the fixing screws of the water pump and the pump bracket, and remove the water pump and water level switch.

This manual is also suitable for:

Mq4g-48han1Kcim-100 dn11Kcim-140 dn11

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