Haier HSM18HEKC03/R2 Service Manual
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Haier HSM18HEKC03/R2 Service Manual

Haier HSM18HEKC03/R2 Service Manual

Ek series wall mounted type air conditioner
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SERVICE MANUAL

Order No.AC1012S001V0

Wall mounted Type

DC Inverter
EK-Series
Model No . HSM18HEKC03/R2(DB)
HSM18HRAC03/R2(DB)
HUM18HC03/R2(DB)
HSM18HEKC03/R2(DB)
HSM18HRAC03/R2(DB)
HUM18HC03/R2(DB)outdoor unit
indoor unit and remote controller
2010

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Summary of Contents for Haier HSM18HEKC03/R2

  • Page 1: Service Manual

    SERVICE MANUAL Order No.AC1012S001V0 Wall mounted Type DC Inverter EK-Series Model No . HSM18HEKC03/R2(DB) HSM18HRAC03/R2(DB) HUM18HC03/R2(DB) HSM18HEKC03/R2(DB) HSM18HRAC03/R2(DB) HUM18HC03/R2(DB)outdoor unit indoor unit and remote controller 2010...

  • Page 2: Table Of Contents

    6.1 System Configuration 6.2 Instruction 7. Error Codes and Descirption 8. Installations 9. Removal Procedure 9.1 Removal of Indoor Unit(HSM18HEKC03/R2(DB) 9.2 Removal of Indoor Unit(HSM18HRAC03/R2(DB) 9.3 The removal procedure of outdoor 10. Wiring Diagrams 10.1 Indoor Unit ....................10.2 Outdoor Unit ....................

  • Page 3: Introduction

    HSM18HEKC/HRAC03/R2(DB) HUM18HC03/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.

  • Page 4: Cautions Regarding Products After Repair

    HSM18HEKC/HRAC03/R2(DB) HUM18HC03/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.
  • Page 5 HSM18HEKC/HRAC03/R2(DB) HUM18HC03/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.

  • Page 6: Inspection After Repair

    Introduction HSM18HEKC/HRAC03/R2(DB) HUM18HC03/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. If a combustible gas leaks and remains around the unit, it can cause a fire.
  • Page 7 HSM18HEKC/HRAC03/R2(DB) HUM18HC03/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. If the installation platform or frame has corroded, replace it.

  • Page 8: List Of Functions

    HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM HSM18HEK/HRACC03/R2(DB) Functions Category HUM18HC03/R2(DB) make your room full of an abundance natural negative ions. Healthy negative ion Child lock Avoid the child's wrong operation on the remote controller The 3D airflow is able to deliver the airflow horizontally and vertically. 3D air flow Use the timer function to set on,or off,or from on to off,or from off to on 24Hour timer...

  • Page 9: Specifications

    HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM HSM18HRAC03/R2(DB) HSM18HEKC03/R2(DB) 1.5~4.9~5.5 1.5~4.9~5.5 1.6~5.35~5.8 1.6~5.35~5.8 5100~16700~18700 5100~16700~18700 5400~18200~19800 5400~18200~19800 1290~4214~4730 1290~4214~4730 1376~4601~4988 1376~4601~4988 400~1530~1950 400~1530~1950 405~1480~2000 405~1480~2000 3.20 3.20 3.61 3.61 6.35 6.35 12.7 12.7 16.0 16.0 14.2 15.0 14.2 15.0 12.7 13.5 12.7 13.5 11.2 13.0...
  • Page 10 HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM HUM18HC03/R2(DB) SNB130FGYM2 FV50S R410a 1235.5 1235.5 1480 1530 820X310X682 919X106X715 46.5...

  • Page 11: Printed Circuit Board Connector Wiring Diagram

    HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM Connector Wring Diagram 4.Printed Circuit Board Connector Wiring Diagram 4.1 Indoor unit Connectors Connectors PCB(1) (Control PCB) For HUM18HC03/R2(DB) 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 5) CON1 Connector for power L 6) CN32 Connector for display board...
  • Page 12 HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM Connector Wring Diagram PCB(1) CN26 CN11 CN32 CN20 CON6 CON1 CON9 CON2 CON6 CON7 CN34 Domestic Air Conditioner...
  • Page 13 HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM Connector Wring 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) CN6 CN7 Connector for terminal to indoor unit 4) CN25 Connector for DC POWER 15Vand 5V to the module board 5) CN9,CN10 Connector for CN2,CN1 on the module board 6) CN12 Connector for AC fan motor 7) CN11 Connector for four way valve coil...
  • Page 14 HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM Connector Wring Diagram PCB(1) CN28 CN25 CN22 CN23 CN22 CN21 CN20 CN19 CN18 CN17 CN47 CN16 CN15 CN45 CN12 CN11 CN36 CN10 Domestic Air Conditioner...
  • Page 15 HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM Connector Wring Diagram PCB(2) CN10 CN11 Domestic Air Conditioner...

  • Page 16: Functions And Control

    HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 5.Funcitions and Control 5.1 Main functions and control specification of indoor unit 5.1.1 Automatic operation When the running mode is turned to automation after starting the system, the system will first determine the running mode according to the current room temperature and then will run according to the determined mode.

  • Page 17: Heating Operation Mode

    HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 5.1.3 Demoisture mode. * temperature control range: 16---30 ±1 * temperature difference: Control feature: send the demoisture signal to the outdoor system. When Tr>Ts+2 , the compressor will be turned on, the indoor fan will opera te at the set speed. When Tr is between the Ts and Ts+2 , the outdoor system will operate at the high demoisture frequency for 10 minutes and then at the low demoisture mode for six minutes.
  • Page 18 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control *Indoor fan control manual control: You can choose high, medium, low and automatic speed control. Automatic: When Tr<Ts, high speed. When Ts=<Tr=<Ts+2 , medium speed. When Tr> Ts+2 , low speed. When the airflow speed has no delay from the high to low switching, the speed should be delayed for 3 minutes (remain at high speed for 3 minutes.) before the next switch.
  • Page 19 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control operation. When the system is at the automatic option ,There is no strength/ mute function,. 5.1.6 Mute operation the system enters the mode after receiving the ‘mute signal’. a. Mute heating: the airflow speed is slight, the system sends the mute signal to the outdoor system. b.
  • Page 20 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control centigrades after 1 hour’s operation and will fall 2 centigrades 1 hours later. 3 hours after the preceding operations, the set temperature will be raised for 1 centigrade and the system will keep this status for 3 hours and then close down. 2.3 During the dormant time, except the change of the system mode or a new press on the dormant setting keys, the timing of the 8 hours dormancy will take the first timing as the start time, any presses on other keys will not affect the original timing.
  • Page 21 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 5.1.12 High load protection control The outdoor system will be stopped if the coil temperature is above 65 for 2 minutes. The indoor fan will be controlled by the thermostat. The outdoor system can be restarted when the coil temperature is below 42 and the system has been stopped for 3 minutes.
  • Page 22 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control can be confirmed and reported and the outdoor system will be stopped. 5.1.16 Single indoor system operation * Enter condition: First, Heating operation mode, set the high speed airflow and 30 centigrade set temperature, then press the dormant keys for 6 times within 7 seconds, the system will feedback with 6 rings.

  • Page 23: Display Function

    HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 5.1.19 Time cutting function: connect the test program terminal on the mainboard after connecting the system to the power circuit. The CPU of the main control will be 60 times faster. 5.1.20 Display function When the system starts up or power on, the background and the LED will be fully lighted for 3 seconds.

  • Page 24: Main Functions And Control Specifications Of Outdoor Unit

    HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control The speed of increasing or decreasing the frequency rapidly 1 -----------1HZ/second The speed of increasing or decreasing the frequency slowly 2 -----------1HZ/10seconds 5.2.1.4 The calculation of the compressor’s frequency The minimum/maximum frequency limitation A While refrigerating: is the maximum operation frequency of the compressor;...
  • Page 25 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control K=∑Ki/the number of running machines The indoor set Breeze Medium High Strong Quiet Healthy airflow speed airflow The percentage 100% 120% rated frequency Ki 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 <...
  • Page 26 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 5.2.3 The control of the outdoor electronic expansion valve When starting the compressor: the opening size of the valve must be guaranteed to have entered into the standard opening size, and then the compressor can be started. When refrigeration is in vain (the machine is shut down or is in the state of retrograde operation), the opening size of the expansion valve of the indoor unit is 5 steps;...

  • Page 27: Protection Function

    HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control and so on, are in effect. During defrosting period, the compressor which is stoped because of protection or malfunction will reinstate after stoping for 3 minutes, and don’t clear the cumulated run time. When it is satisfied with the continuously running time, it will enter into the defrosting mode. After entering into defrosting mode, make sure the compressor runs for at least for 2 minutes, and then it can withdraw from defrosting.
  • Page 28 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control state). The indoor heat exchanger sensor tests the temperature of the indoor heat exchanger. If the temperature is higher than 55 , decrease the rotate speed of the compressor and do the high temperature-preventing protection of the indoor heat exchanger; if the temperature of the indoor heat exchanger is lower than 47 , recover to the normal control.
  • Page 29 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control Remarks: when the outdoor temperature is high, there’s compensation for AC current protection. When the outdoor environment temperature is higher than 40 , AC current protection value decreases by 1.5A When the outdoor environment temperature is higher than 50 ,AC current protection value decreases by 2.5A 5.2.6.5 Antifreezing protection of the indoor heat exchanger When refrigerating/heating, prevent freezing.
  • Page 30 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 5.2.6.9 Malfunction display and malfunction handling a) For the complete appliance’s malfunctions Annex 2 If there’s malfunction with the outdoor unit, the light of the outdoor unit will flash and its frequency is 1HZ, the number of times is according to the table, when a round of flashing is finished, the light shoud be off for 5 seconds.

  • Page 31: Value Of Thermistor

    HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 5.3 Value of Thermistor 5.3.1 intdoor Unit Room sensor and Pipe Sensor R25 =10KΩ±3% B25 /50 =3700K±3% Temp.(( )) Max.(KΩ) Normal(KΩ) Min.(KΩ) Tolerance( ) 165.2170 147.9497 132.3678 -1.94 1.75 155.5754 139.5600 125.0806 -1.93 1.74 146.5609 131.7022 118.2434 -1.91 1.73...
  • Page 32 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 21.9714 20.8659 19.7982 -1.15 1.12 20.9688 19.9409 18.9463 -1.13 1.09 20.0176 19.0621 18.1358 -1.11 1.07 19.1149 18.2270 17.3646 -1.08 1.05 18.2580 17.4331 16.6305 -1.06 1.03 17.4442 16.6782 15.9315 -1.03 1.01 16.6711 15.9601 15.2657 -1.01 0.99 15.9366 15.2770 14.6315 -0.98...
  • Page 33 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 3.6601 3.4416 3.2332 -1.82 1.74 3.5374 3.3227 3.1183 -1.87 1.78 3.4195 3.2085 3.0079 -1.91 1.82 3.3060 3.0989 2.9021 -1.95 1.85 3.1969 2.9935 2.8005 -2.00 1.89 3.0919 2.8922 2.7029 -2.04 1.93 2.9909 2.7948 2.6092 -2.08 1.97 2.8936 2.7012 2.5193 -2.13...
  • Page 34 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 0.9232 0.8319 0.7489 -4.01 3.64 0.8983 0.8088 0.7275 -4.07 3.69 0.8741 0.7863 0.7067 -4.12 3.74 0.8507 0.7646 0.6867 -4.18 3.78 0.8281 0.7436 0.6672 -4.23 3.83 0.8061 0.7233 0.6484 -4.29 3.88 0.7848 0.7036 0.6303 -4.34 3.92 0.7641 0.6845 0.6127 -4.40...
  • Page 35 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 59.6076 54.9866 50.6781 -1.60 1.49 56.5296 52.2278 48.2099 -1.58 1.47 53.6294 49.6244 45.8771 -1.56 1.46 50.8956 47.1666 43.6714 -1.54 1.44 48.3178 44.8454 41.5851 -1.51 1.42 45.8860 42.6525 39.6112 -1.49 1.40 43.5912 40.5800 37.7429 -1.47 1.39 41.4249 38.6207 35.9739 -1.45...
  • Page 36 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 7.5359 7.2461 6.9611 -1.02 1.00 7.2546 6.9673 6.6854 -1.06 1.04 6.9852 6.7008 6.4222 -1.10 1.07 6.7273 6.4459 6.1707 -1.13 1.11 6.4803 6.2021 5.9304 -1.17 1.14 6.2437 5.9687 5.7007 -1.21 1.18 6.0170 5.7454 5.4812 -1.25 1.22 5.7997 5.5316 5.2712 -1.29...
  • Page 37 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 1.6409 1.5051 1.3794 -2.97 2.75 1.5923 1.4592 1.3360 -3.02 2.80 1.5454 1.4149 1.2942 -3.07 2.84 1.5000 1.3721 1.2540 -3.12 2.88 1.4562 1.3308 1.2151 -3.17 2.93 1.4139 1.2910 1.1776 -3.22 2.97 1.3730 1.2525 1.1415 -3.27 3.01 1.3335 1.2153 1.1066 -3.32...
  • Page 38 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control B25/80 =4450K±3% Temp.(( )) Max.(KΩ) Normal(KΩ) Min.(KΩ) Tolerance( ) 14646.0505 12061.7438 9924.4999 -2.96 2.45 13654.1707 11267.8730 9290.2526 -2.95 2.44 12735.8378 10531.3695 8700.6388 -2.93 2.44 11885.1336 9847.7240 8152.2338 -2.92 2.43 11096.6531 9212.8101 7641.8972 -2.91 2.42 10365.4565 8622.8491 7166.7474 -2.90 2.42...
  • Page 39 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 1051.4226 934.9440 830.6210 -2.31 2.07 996.7169 887.6792 789.8583 -2.29 2.06 945.1404 843.0486 751.3077 -2.27 2.04 896.4981 800.8922 714.8380 -2.26 2.03 850.6086 761.0603 680.3265 -2.24 2.02 807.3024 723.4134 647.6580 -2.22 2.00 766.4212 687.8205 616.7252 -2.20 1.99 727.8172 654.1596 587.4271 -2.18...
  • Page 40 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 123.8956 117.2504 110.8618 -1.37 1.32 118.7926 112.5589 106.5564 -1.35 1.30 113.9241 108.0776 102.4388 -1.32 1.28 109.2784 103.7961 98.5000 -1.30 1.26 104.8443 99.7046 94.7315 -1.28 1.23 100.6112 95.7939 91.1253 -1.25 1.21 96.5692 92.0553 87.6735 -1.23 1.19 92.7088 88.4805 84.3690 -1.20...
  • Page 41 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Function and control 23.7620 22.5245 21.3323 -1.69 1.63 23.0205 21.8002 20.6261 -1.73 1.66 22.3055 21.1025 19.9465 -1.77 1.70 21.6159 20.4303 19.2924 -1.81 1.74 20.9508 19.7825 18.6626 -1.85 1.77 20.3091 19.1582 18.0563 -1.89 1.81 19.6899 18.5564 17.4723 -1.93 1.85 19.0924 17.9761 16.9098 -1.98...

  • Page 42: System Configuration

    HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM 6.2.1 The Instruction of HSM18HEKC03/R2(DB)HUM18HC03/R2(DB)

  • Page 43: Parts And Functions

    HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM Parts and Functions 7.TEMP display Inlet Air Purifying Filter (inside) 8.POWER/SOFT display 9. HEALTH display 10. QUIET button Inlet grille 11. HEAT button 12. COOL button 13. AUTO button Outlet 14. FAN button Vertical blade 15. TIMER button Emergency (adjust left and 16.

  • Page 44: Emergency Operation

    HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM 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 " sound is heard once, which means the start of this operation.

  • Page 45: Sleep Operation

    HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM 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.
  • Page 46 HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM EUROPEAN REGULATIONS Operation CONFORMITY FOR THE MODELS Timer On/Off On-Off Operation 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. - Low Voltage Directive 2006/95/EC 2.Press TIMER button to change TIMER mode.
  • Page 47 HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM Maintenance For Smart Use of The Air Conditioner 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...
  • Page 48 HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM 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, Use an exclusive immediately stop the operation button and power source...

  • Page 49: Outdoor Unit

    HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM Trouble shooting Cautions Before asking for service, check the following Do not obstruct or cover the ventilation grille of the air first. or any other things into the conditoner.Do not put fingers inlet/outlet and swing louver. .In no Do not allow children to play with the air conditioner Phenomenon Cause or check points...
  • Page 50 Introduction HSM09/12HRAC03/R2(DB) HUM09/12HC03/R2(DB) -SM 6.2.2 The Instruction of HSM18HRAC03/R2(DB) HUM18HC03/R2(DB) Parts and Functions 9. ON/OFF button Inlet Air Purifying Filter 10. TIMER ON display (inside) 11. FAN SPEED display Inlet grille AUTO 12. LOCK display Outlet 13. SWING display 14. SLEEP display 15.

  • Page 51: Error Codes And Descirption

    Introduction HSM09/12HRAC03/R2(DB) HUM09/12HC03/R2(DB) -SM 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. - Low Voltage Directive 2006/95/EC 2.Press TIMER button to change TIMER mode.
  • Page 52 Introduction HSM09/12HRAC03/R2(DB) HUM09/12HC03/R2(DB) -SM Maintenance Indoor Body Remote Controller 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 with a dry cloth.Do not use glass...
  • Page 53 Introduction HSM09/12HRAC03/R2(DB) HUM09/12HC03/R2(DB) -SM 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, Use an exclusive immediately stop the operation button and power source...

  • Page 54: Trouble Shooting

    Introduction HSM09/12HRAC03/R2(DB) HUM09/12HC03/R2(DB) -SM Trouble shooting Cautions Before asking for service, check the following grille of the air Do not obstruct or cover the ventilation first. 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 Phenomenon...

  • Page 55: Service Diagnosis

    HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Service Diagnosis 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. 2.When a signal transmission error occurs between the indoor and outdoor units.In either case, conduct the diagnostic procedure described in the following pages.

  • Page 56: Error Codes And Description Indoor Display

    HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Service Diagnosis 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 .63 outdoor units Room temperature sensor failure Page .55 Indoor Malfunction Heat-exchange sensor failure Page .55 Page .62 Indoor EEPROM error...
  • Page 57 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Service Diagnosis 7.3.1Thermistor or Related Abnormality (indoor unit) E1: Room temperature sensor failure Indoor Display E2: Heat-exchange sensor failure Method of the temperatures detected by the thermistors are used to determine thermistor errors Malfunction Detection Malfunction when the thermistor input is more than 4.92V or less than 0.08V during compressor Decision operation.
  • Page 58 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Service Diagnosis 7.3.2 Indoor fan motor malfunction Indoor Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation Detection Malfunction when the detected rotation feedback singal don’t receiced in 2 minutes Decision Conditions Supposed Causes...
  • Page 59 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Service Diagnosis Turn off power supply and rotate fan by hand Does fan rotate Replace fan motor smoothly? Turn power ON and operate fan Turn off power supply and disconnect fan motor connector,then turn power ON Does it rotate? Check output of fan motor connector I s m o t o r p o w e r voltage DC310V...

  • Page 60: Ipm Protection

    HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Service Diagnosis 7.3.3 IPM protection outdoor display LED1 flash 2 times: Indoor Display F1 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 Decision The compressor faulty leads to IPM protection Conditions...
  • Page 61 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Service Diagnosis 7.3.4 The IPM and outdoor PCB don’t communicate or Related Abnormality outdoor display LED1 flash 4 times Indoor Display Method of Communication is detected by checking the IPM module and the outdoor PCB Malfunction Detection Malfunction The outdoor PCB broken leads to communication fault Decision The IPM module broken leads to communication fault Conditions...
  • Page 62 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Service Diagnosis Indoor display: outdoor display: LED1 flash 10 times: Exhaust temperature sensor failure Indoor display: outdoor display: LED1 flash 13 times: Ambient temperature sensor failure Indoor display: outdoor display: LED1 flash 12 times: Method of This type of error is detected by checking the thermistor input voltage to the microcomputer. Malfunction (A thermistor error is detected by checking the temperature) Detection...
  • Page 63 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Service Diagnosis outdoor display LED1 flash 8 times Method of the exhaust temperature control is checked with the temperature being detected Malfunction by the exhaust pipe thermistor Detection Malfunction when the compressor discharge temperature is above 117 Decision Conditions Supposed Electronic expansion valve defective Causes...
  • Page 64 HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Service Diagnosis The sensor is damaged. Replace the sensor the results deviate with a new one. much? The outdoor mainboard is damaged and needs be replaced 7.3.7 The EEPROM Abnormality (Indoor or outdoor unit) Indoor Display Indoor EEPROM error F12 Outdoor EEPROM error Method of the Data detected by the EEPROM are used to determine MCU...

  • Page 65: Communication Error Between The Indoor And Outdoor Units

    HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Service Diagnosis 7.3.8 Communication error between the indoor and outdoor units Indoor display Outdoor: display LED1 flash 15 times Method of The date received from the another unit in indoor unit-outdoor unit signal transmission is Malfunction checked whether is normal When the date sent from the another unit cannot be received normally,or when the content of the data is abnormal indoor unit- outdoor unit signal transmission error due to wiring error...

  • Page 66: Installations

    HSM18HEKC/HRAC03/R2(DB)HUM18HC03/R2(DB)-SM Service Diagnosis Check the status of LED1 on the indoor mainboard. If the LED1 blinks measure voltage between Jumpers 3 and 4 of IC8 on the indoor mainboard with a multimeter. Test the outdoor power supply (230VAC and +310VDC) with a multimeter.
  • Page 67 Servive Diagnosis HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM 7.3.10 Power Supply Over or under voltagve fault Indoor display outdoor display: LED1 flash 6 times Method of An abnormal voltage rise or fall is detected by checking the specified voltage detection circuit. Malfunction Detection Malfunction An voltage signal is fed from the voltage detection circuit to the microcomputer Decision...

  • Page 68: Loop Of The Station Detect Error

    HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM Servive Diagnosis 7.3.11 Loop of the station detect error Outdoor Display LED1 flash 18 times Indoor Display LED1 flash 19 times Indoor Display Method of the position of the compressor rotor can not detected normally Malfunction Detection Malfunction when the The wiring of compressor is wrong or the connection is poor;...
  • Page 69 HSM18HEKC/HRAC03/R2(DB) HUM18HC03/R2(DB) -SM Servive Diagnosis 7.3.12 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.

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