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2HUM18HC03/R2(DB)-SM of indoor unit main function and control specification of outdoor unit Removal of Air Filter Removal of Front panel Horiaontal Flap Vertical Blades and Swing Motor...
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2HUM18HC03/R2(DB) ............................9.10 Removal of Fan and Fan motor ................ 9.11 9.12 Removal of Left Side Plate ..............87 9.13 Removal of Fan motor and Bracket ............89 9.14 Removal of Right Side Plate..............93 9.15 Removal of Compressor and Heat Exhanger..........94...
2HUM8HC03/R2(DB)-SM Introduction 1. Introduction 1.1 Safety Cautions Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “Warning” and “Caution”. The “Warning” items are especially important since they can lead to death or serious injury if they are not followed closely. The “Caution” items can also lead to serious accidents under some conditions if they are not followed.
2HUM18HC03/R2(DB)-SM Introduction Warning Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock. Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock.
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2HUM18HC03/R2(DB)-SM Introduction Warning Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to the electrical equipment, the internal wiring regulations and the instruction manual for installation when conducting electrical work. Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire.
Introduction 2HUM18HC03/R2(DB)-SM Caution Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site, to prevent electrical shocks. Do not install the equipment in a place where there is a possibility of combustible gas leaks.
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2HUM18HC03/R2(DB)-SM Introduction Caution Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure. Improper installation and connections can cause excessive heat generation, fire or an electrical shock.
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2HUM18HC03/R2(DB)-SM HSM09/12HEKC03/R2(DB) Category Functions 2HUM18HC03/R2(DB) make your room full of an abundance natural negative ions. Healthy negative ion Avoid the child's wrong operation on the remote controller Child lock The 3D airflow is able to deliver the airflow horizontally and vertically.
2HUM18HC03/R2(DB)-SM Connector wiring diagram 4.1 Indoor unit Connectors Connectors PCB(1) 1) CN26 Connector for fan motor 2) CN1 Connector for heat exchanger thermistor and Room temperature thermistor 3) CN11 Connector for UP&DOWN STEP motor 4) CON2 Connector for power N wire...
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2HUM18HC03/R2(DB)-SM Connector wiring diagram 4.2: outdoor unit Connectors PCB(1) (Control PCB) 1) CN1,CN2 Connector for power N and L 2) CN3 Connector for ground 3) CN23 Connector for DC POWER 15Vand 5V to the module board 4) CN9,CN10 Connector for CN2,CN1 on the module board...
2HUM18HC03/R2(DB)-SM Wiring diagrams 5.Funcitions and Control 5.1 Main functions and control specification of indoor unit 5.1.1 Automatic operation When the system is under the automatic operation option, the appropriate operation mode will be decided according to the differences between the preset temperature and the indoor temperature after the system starts up.
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2HUM18HC03/R2(DB)-SM Wiring diagrams Manus: When the system is operating, you can set the high, medium or low speed manually. ( When the sensor is on or off, the system will change the speed 2 seconds after receiving the signal.) *Airgate location control: the location for the airgate can be set according to your needs.
2HUM18HC03/R2(DB)-SM Wiring diagrams * timing system on/off function. * Dormant control function. 5.1.4 Heating operation mode. * temperature control range: 16---30 * temperature difference: * control feature: the temperature compensation is automatically added and the system will send the heating signals to the outdoor system.
2HUM18HC03/R2(DB)-SM Wiring diagrams until the compressor has been started up for 30 seconds. The indoor temperature display will not change and the system operates at the cold air proof mode. * Automatic heating temperature compensation: when the system enters the heating mode, the temperature compensation (4) will be added.
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2HUM18HC03/R2(DB)-SM Wiring diagrams waiting mode. The light will be turned off when the timing is finished and the rest of the system will operate under a normal condition. The timing starts since the last reception of the timing singal. You can have the dormacy setting under the timing mode, the order of your settings will be operated according to the timing settings.
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2HUM18HC03/R2(DB)-SM Wiring diagrams 5.1.10 Urgent on/off input Press the urgency button the buzzer will ring. The system will enter the automatic mode if you don’t press the button for more than 5 seconds. Under the system off mode, if you press the urgency key for 5 to 10 seconds, the system will start the test operation.
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2HUM18HC03/R2(DB)-SM Wiring diagrams 5.1.13 abnormal operation of indoor system When the outdoor system operates, if the indoor system operation differs from the outdoor system, the abnormal operation malfunction will be reported. 10s after the report, the indoor system will be closed.
2HUM18HC03/R2(DB)-SM Wiring diagrams operate according to the set mode and neglect the communication signals of the outdoor system. However, it has to send signals to the outdoor system. * Quitting condition: This mode can be quitted after receiving the quitting signal from the remote control or urgency system.
2HUM18HC03/R2(DB)-SM Wiring diagrams second—LED screen lights for 0.5 second— the step-in motor fully output for 0.5 second—then the motor doesn’t output for 0.5 second—the motor fully output again for 0.5 second. The test program finishes. 5.1.20 Time cutting function: connect the test program terminal on the mainboard after connecting the system to the power circuit.
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2HUM18HC03/R2(DB)-SM Wiring diagrams Serial Temperature scope Frequency limitation Wh_c<-12 Max_hz8 120 HZ Wh_c<-8 Max_hz7 120HZ Wh_c<-2 Max_h z4 120 HZ Wh_c<5 Max_hz5 120HZ Wh_c<12 Max_hz1 100HZ Wh_c<18 Max_hz2 56 HZ Wh_c> 18 Max_hz6 44 HZ Remarks: the above are the maximum frequency limitations of the complete appliance which are affected by the environment, and they have nothing to do with the ability of the indoor unit.
2HUM18HC03/R2(DB)-SM Wiring diagrams The calculation of the actual output frequency: when there is no healthy airflow: F =F-ED-* P K When the healthy airflow has been set: F =F-ED-* P K airflow speed K healthy airflow When refrigerating, it is needed to satisfy <...
2HUM18HC03/R2(DB)-SM Wiring diagrams When the outdoor unit is shut down, the valve is opened completely for 2 minutes, and then begin initialization. The scope of refrigerationg valve 90-----480 steps The scope of heating valve 80-----480 steps The valves are adjusted according to the degree of superheat SHa.
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2HUM18HC03/R2(DB)-SM Wiring diagrams The compressor stops Fgh_t1 2 Fgh_t1 65 Decreasing the frequency rapidly Fgh_t2 Fgh_t2 2 P Decreasing the frequency slowly Fgh_t3 Fgh_t3 2 Q Prohibiting increasing the frequency Fgh_t4 Fgh_t4 2 R Increasing slowly Fgh_t5 Fgh_t5 2 Normal...
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2HUM18HC03/R2(DB)-SM Wiring diagrams When the outdoor environment temperature is higher than 50 ,AC current protection value decreases by 20AD 5.2.5.5 Antifreezing protection of the indoor heat exchanger When refrigerating/heating, prevent freezing. Tpg_indoor is the minimum value of the effective indoor unit (start it and it is in accord with the running state).
2HUM18HC03/R2(DB)-SM Wiring diagrams light shoud be off for 5 seconds. b) For the units’ malfunctins Annex 1 If there’s malfunction with the units, this will not affect the run of the complete appliance, but this can be displayed by the malfunction light, the light flashing frequency is 0.5HZ, the number of times is according to the malfunction table of the indoor units.
2HUM18HC03/R2(DB)-SM Introduction Operation Emergency Operation: Use this operation only when the remote controller is defective or lost, and with function of emergency running, air conditoner Remote controller can run automatically for a while. When the emergency operation switch is pressed, the " Pi "...
2HUM18HC03/R2(DB)-SM Introduction Operation Sleep Operation 4. In FAN mode Before going to bed,you can simply press the SLEEP It has no SLEEP function. button and unit will operate in SLEEP mode and bring 5.Set the wind speed change when sleeping you a sound sleep.
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2HUM18HC03/R2(DB)-SM Introduction EUROPEAN REGULATIONS Operation CONFORMITY FOR THE MODELS All the products are in conformity with the following European provision: Set clock correctly before starting TIMER operation. - Low Voltage Directive 73/23/EEC 1.After unit starts, select your desired operation mode.
2HUM18HC03/R2(DB)-SM Introduction Maintenance Remote Controller Indoor Body Setting of proper room Do not block the air inlet temperature or outlet Proper wipe the air conditioner by using a temperature soft and dry cloth.For serious stains, use a neutral detergent diluted with Do not usewater,wipe the controller water.Wring the water out of the...
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2HUM18HC03/R2(DB)-SM Introduction Cautions WARNING Please call Sales/Service Shop for the Installation. Do not attempt to install the air conditioner by yourself because improper works may cause electric shock, fire, water leakage. WARNING Check proper When abnormality such as burnt-small found,...
2HUM18HC03/R2(DB)-SM Introduction Trouble shooting Cautions grille of the air Do not obstruct or cover the ventilation conditoner.Do not put fingers or any other things into the inlet/outlet and swing louver. Do not allow children to play with the air conditioner .In no...
2HUM18HC03/R2(DB)-SM Wiring diagrams 7.Service Diagnosis 7.1 Caution for Diagnosis The operation lamp flashes when any of the following errors is detected. 1.When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions, disabling equipment operation.
7.3.Error Codes and Description indoor display Code indication Reference Outdoor Description Page indoor (LED1 flash times) Indoorand Outdoor Communication fault between indoor and Page .60 outdoor units Room temperature sensor failure Page .50 Indoor Malfunction Heat-exchange sensor failure Page .50 Indoor fan motor malfunction Page .52 i t c...
2HUM18HC03/R2(DB)-SM Wiring diagrams 7.3.1 Thermistor or Related Abnormality Indoor Display E1: Room temperature sensor failure E2: Heat-exchange sensor failure outdoor display LED1 flash 10 times Frost-removing temperature sensor failure LED1 flash 11 times Suction temperature sensor failure LED1 flash 12 times Ambient temperature sensor failure...
2HUM18HC03/R2(DB)-SM Wiring diagrams 7.3.2 EEPROM abnormal Indoor Display E4: indoor EEPROM error Indoor display F12: Outdoor EEPROM error ;Outdoor LED1 flash 1 times Method of The Data detected by the EEPROM are used to determine MCU Malfunction Detection Malfunction when the data of EEPROM is error or the EEPROM is damaged...
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2HUM18HC03/R2(DB)-SM Wiring diagrams or else parts damage may be occurred. Pull out the terminals on the indoor Check whether terminals mainboard and reinsert them. on indoor pcb is well ? Electrify the machine again and turn it on in the cooling operation,...
2HUM18HC03/R2(DB)-SM Wiring diagrams Outdoor DC fan motor fault 7.3.4 Check whether Terminal on the outdoor mainboard is well inserted. Reinsert the terminals Is it normal? Electrify the machine again and turn it on in the Cool state with the remote controller.
2HUM18HC03/R2(DB)-SM Wiring diagrams 7.3.5 IPM protection Outdoor display LED1 flash 2 times Method of IPM protection is detected by checking the compressor running condition and so on Malfunction Detection Malfunction The system leads to IPM protection due to over current...
2HUM18HC03/R2(DB)-SM Wiring diagrams 7.3.6 Over-current of the compressor Outdoor Display LED1 flash 3 or 24 or 25 times Method of The current of the compressor is too high Malfunction Detection Malfunction when the IPM Module is damaged Decision or the compressor is damaged Conditions power supply.
2HUM18HC03/R2(DB)-SM Wiring diagrams Electrify the machine again and turn it on with the remote controller,If malfunctions IPM Module is damaged and reported before upon needs replacing. compressor being started up, The compressor is started normally, but malfunctions are reported after it Repair the power supply has run for some time.
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2HUM18HC03/R2(DB)-SM Wiring diagrams 1) Check whether Terminal CN23 and CN24 on the outdoor mainboard CN10 and CN11 on IPM module 2) Check whether the connected wire between IPM and outdoor 1) Pull out and reinsert the terminals. 2) Replace connected wire...
2HUM18HC03/R2(DB)-SM Wiring diagrams Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or else parts damage may be occurred. Electrify the machine again and turn it on with the remote controller. Check whether the...
2HUM18HC03/R2(DB)-SM Wiring diagrams Electrify the machine again and turn it on with the remote controller, then measure the temperature at the exhaust temperature sensor of the compressor on the outdoor unit 1) The cryogen may have been leaked during installation, or there may be leakage in the piping the temperature exceeds system.
2HUM18HC03/R2(DB)-SM Wiring diagrams 7.3.10 The communication fault between indoor and outdoor Indoor display outdoor display LED1 flash 15 times Method of Communication is detected by checking the indoor PCB and the outdoor PCB Malfunction Detection Malfunction The outdoor PCB broken leads to communication fault...
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2HUM18HC03/R2(DB)-SM Wiring diagrams Check the indoor mainboard. measure the voltage between Jumpers 3 and 4 of IC1 on the indoor mainboard with a multimeter. Test the outdoor power supply (230VAC and +310VDC) with a multimeter. If the voltage is of a constant...
2HUM18HC03/R2(DB)-SM Wiring diagrams 7.3.11 Loss of synchronism detection Inverter side current detection is abnormal Outdoor Display LED1 flash 18 times LED1 flash 19 times Method of The position of the compressor rotor can not detected normally Malfunction Detection Malfunction when the wiring of compressor is wrong or the connection is poor;...
2HUM18HC03/R2(DB)-SM Wiring diagrams 7.3.12 High work-intense protection Outdoor display LED1 flash 21 times Method of High work-intense control is activated in the heating mode if the temperature Malfunction being sensed by the heat exchanger thermistor exceeds the limit. Detection Malfunction...