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Acson AWM Service Manual Book

Acson AWM Service Manual Book

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Summary of Contents for Acson AWM

  • Page 1 SERVICE GUIDE BOOK...

  • Page 2: Table Of Contents

    ACSON Service Guide Book Table of Contents Model Name Product Name Description ....... Nomenclature ....... Conversion Table Conversion Table ....... Product Mainboard vs. Handset Matrix Product Mainboard vs. Handset Matrix ....... Controller Development History Controller Development History ....... Handset Operating Guide .......

  • Page 3: Model Name

    ACSON Service Guide Book 1.0 Model Name 1.1 Product Name Description Description Generic Model Name ACSON Brand Wall Mounted Fan Coil Unit WM / 5WM AWM / A5WM Wall Mounted AC Inverter Fan Coil Unit AWMV Wall Mounted DC Inverter Fan Coil Unit...

  • Page 4: Nomenclature

    ACSON Service Guide Book 1.2 Nomenclature Indoor Unit Product Specifications Variation AA : Revision Connection Type F : Flare X : Not Applicable Electrical A : 220-240V/1Ph/50Hz F : 380-415V/3Ph/50Hz Piping H : 4 Pipes System Omitted if 2 pipes system...

  • Page 5: Outdoor Unit

    ACSON Service Guide Book Outdoor Unit Others A : First Issue Specifications Variation O : Standard Unit I : Gold Fins G : Low Ambient Unit H : High Ambient Unit Compressor P : Panasonic M : Mitsubishi Market Region...

  • Page 6: Conversion Table 2.1 Conversion Table

    ACSON Service Guide Book 2.0 Conversion Table 2.1 Conversion Table Capacity Btu/hr kCal/Hr 0.001 0.252 0.293 x 10 1000 0.293 3.968 0.004 1.162 x 10 3412 3.412 860.04 Pressure W.G. Pascal kg/cm (in.) (ft.) (Pa) 0.07 27.7 2.309 0.69 x 10 14.22...

  • Page 7: Product Mainboard Vs. Handset Matrix

    ACSON Service Guide Book 3.0 Product Mainboard vs. Handset Matrix Main Board (IC) Handset Type No. L2.0 L2GSN L208A W_2_03A U1SB125 2P206569-4 SQ2.0 VA2.0 VA3.0 Standard Optional Model WM - F Series SLM3 + AC5300 / Netware 3 WM - G Series...
  • Page 8 ACSON Service Guide Book Main Board (IC) Handset Type MC1.0 LWS2 APM01CB APM02D Standard Optional Model WM – GW Series SLM3 + AC5300 / Netware 3 CK – AW/AWH/CW Series SLM3 + AC5300 / Netware 3 CE – DW Series...

  • Page 9: Controller Development History

    ACSON Service Guide Book 4.0 Controller Development History Handset Model Year Main Board Remarks Wireless Wired Cooling Heating WM 10/15D WM 10/15DR Copper sensor 1996 Challenger 2.1 & 2.2 WM 20/25C WM 20/25CR 1996 Challenger 2.2 WM 07/10E Copper sensor...
  • Page 10 ACSON Service Guide Book Handset Model Year Main Board Remarks Wireless Wired Cooling Heating SLM3 / Valveless application 2002 Chilled Water W1V3 WM-FW / CE-DW / CC-CW / CK-AW / CK-BW Netware 2 (optional) only 2002 Multi Split Indoor, MS10.0...

  • Page 11: Handset Operating Guide

    ASCON Service Guide Book 5.0 Handset Operating Guide 5.1 G6 Outlook Operation Guide 1. “ON/OFF” Switch • Press to start the air conditioner unit. Press again to stop the unit. • 2. Temperature Setting Set the desire room temperature. • Press button to increase or decrease the set temperature.
  • Page 12 ASCON Service Guide Book 5. Timer Setting Press set button to activate the timer setting (from 1 hour to 15 hour) of the air conditioning unit. It will be in “On” or “Off” condition after the set time depending to the current condition (either from “On”...

  • Page 13: Operation Guide

    ASCON Service Guide Book 5.2 G8 Outlook Operation Guide 1. Transmission Source The source where the signal will be transmitted. • 2. Signal Transmission Indication Blink to confirm the last setting has been send to the unit. • 3. On/Off Button Press once to start the air conditioner.
  • Page 14 ASCON Service Guide Book 5. Operation Mode Press the MODE button to select the type of operating mode. • For cooling only unit, the available modes are: COOL, DRY & FAN. • For heat pump unit, the available modes are: AUTO, COOL, DRY, FAN & HEAT. •...

  • Page 15: G12

    ASCON Service Guide Book 5.3 G12 Outlook Operation Guide 1. “ON/OFF” Button Press once to start the air conditioner unit. • Press again to stop the unit. • 2. Temperature Setting To set the desired room temperature, press ▲ the button to increase or ▼ button to decrease •...
  • Page 16 ASCON Service Guide Book 4. Fan speed selection Press the button continuously will toggle the fan speed in the following order: Low ( ) –––: • Med ( ) –––: High ( ) –––: Auto Stop pressing when the desired fan speed appears on the display screen. •...

  • Page 17: G18

    ASCON Service Guide Book 5.3 G18 Outlook Operation Guide 1. Transmission Source The source where the signal will be transmitted. • 2. Signal Transmission Indication Blink to confirm that the last setting has been transmitted to the unit. • 3. Temperature Setting To set the desired room temperature, press the ▲...
  • Page 18 ASCON Service Guide Book 5. Automatic Air Swing (optional) Press the SWING button to activate the automatic air swing function. • To distribute the air to a specific direction, press the SWING button and wait until the • louver move to the desired direction and press the button once again. 6a.

  • Page 19: Gs02

    ASCON Service Guide Book 5.4 GS02 Operation Guide 1. Transmission Source The source where the signal will be transmitted. • 2. Signal transmission indication Blink to confirm that the last setting has been transmitted to the unit. • 3. ON/OFF Button Press once to start the air conditioner unit.
  • Page 20 ASCON Service Guide Book 5. Operation mode Press the MODE button to select the type of operating mode. • For cooling only unit, the available modes are: COOL , DRY and FAN • For heat pump unit, the available modes are: AUTO , COOL , DRY , FAN...
  • Page 21 ASCON Service Guide Book 12. Sleep mode setting Press the button will activate the sleep • mode function. This is an energy saving option. When the unit • is operating under cooling mode, the set temperature is increased by 0.5°C after the first half an hour, another 0.5°C after the second half an hour and 1°C after the following 1 hour.

  • Page 22: Apj2

    ASCON Service Guide Book 5.5 APJ2 Operation Guide 1. Transmission Source The source where the signal will be transmitted. • 2. LCD Display It displays the current settings. • (In this illustration, each section is shown with its displays on for the purpose of explanations) •...
  • Page 23 ASCON Service Guide Book POWERFUL Button POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. • To start POWERFUL operation, press . POWERFUL operation ends in 20 • minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.
  • Page 24 ASCON Service Guide Book 11. ON TIMER Operation • To use ON TIMER operation, press button. is displayed on the LCD. Each pressing of advances the time setting by 1 hour. • The timer can be set between 1 to 12 hours. To cancel ON TIMER operation, press button.

  • Page 25: Slm3

    ASCON Service Guide Book 5.6 SLM3 Operation Guide 1. “ON/OFF” Switch • Press to start the air conditioner unit. Press again to stop the unit. • 2. Temperature Setting Set the desired room temperature. • Press button to increase or decrease the set temperature. •...
  • Page 26 ASCON Service Guide Book 6. “SLEEP” Mode Press button to activate the sleep function. This function can only be activated under “cool” or • heating mode operation. When it is activated under “cool” mode operation, the set temperature will increase 0.5°C after 30 minutes, 1°C after 1 hour and 2°C after 2 hours. If it is activated under “HEAT”...

  • Page 27: Sequential Lcd

    ASCON Service Guide Book 5.7 Sequential Controller Outlook A : Time display B : Error indication C : Compressor running display (up to 4 compressors) D : Key lock display E : Heat display (up to 2 heaters) F : Energy saving mode display G : Compressor deforst cycle display (up to 4 compressors) H : Operation mode display...
  • Page 28 ASCON Service Guide Book 5. Temperature Setting To set the desired room temperature, press to increase or decrease the • set temperature in the range of 16°C to 30°C. Press both simultaneously to toggle between °C and ° F setting. •...

  • Page 29: Netware 3

    ASCON Service Guide Book 5.8 Netware 3 Outlook 1. Time display 2. Key lock display 3. Error indication 4. Fan speed display 5. Operation mode display 6. Sleep mode display 7. Air swing display 8. Temperature set display Operating Guide 1.
  • Page 30 ASCON Service Guide Book 2. Selecting Operating Mode Press the MODE key to select the type of operating mode. Consecutive press of the key • switches the operation over “COOL”, “HEAT”, “AUTO”, “DRY” and “FAN” 3. Fan Speed Selection Press the FAN key until the desired fan speed is achieved. •...

  • Page 31: Controller Configuration

    ASCON Service Guide Book 6.0 Controller Configuration 6.1 Auto Random Restart Shorted at JH/JP1/J_LST jumper at main board for auto restart (supplied). • Remove the jumper to have non-auto restart. • D2.0 U1.5 / SQ2.0 L2.2 / L208A / LWS / W2...

  • Page 32: Hot Keep Selection

    ASCON Service Guide Book 6.2 Hot Keep Selection Three selections available: a. Fan stop if indoor coil temperature < 30°C (OFF). b. Fan runs at low speed if indoor coil temperature < 30°C and stop if indoor coil temperature < 18°C (ON).
  • Page 33 ASCON Service Guide Book L2 Models Two selections are available: a. Fan ON: - If the indoor coil temperature > 40°C, the indoor fan will run at speed. - If the indoor coil temperature crosses 37°C, the indoor fan willrun at low speed. - if the indoor coil temperature <18°C, the indoor fan will stop.

  • Page 34: Auxiliary Heater Conversion

    ASCON Service Guide Book 6.3 Auxiliary Heater Conversion U1.5 Heatpump with Auxiliary Heater To convert the standard U1.5 heatpump PCB to with auxiliary heater application, the following components need to be added onto the PCB. 1. Heater relay 2. Transistor 3.
  • Page 35 ASCON Service Guide Book To convert SB125 heatpump PCB to auxiliary heater application, you need only one heater relay as shown below: 1. Place the JM relay on the RY_HTR location 2. Solder all the relay pins. SB125 Heatpump without Auxiliary heater SB125 Heatpump with Auxiliary Heater Relay 240V/ 20A...
  • Page 36 ASCON Service Guide Book W2 Heatpump with Auxiliary heater To convert SB125 heatpump PCB to auxiliary heater application, you need the following components to be added onto the PCB: 1. Shunt jumper 2. JM Relay 240VAC/ 20A Step 1:- Place the shunt jumper at jumper header M2. Step 2:- 1.

  • Page 37: Multi Split Conversion

    ASCON Service Guide Book 6.4 Multi Split Conversion Cooling Only Model (L2.0 / L208A) The cooling only model WM-G, CK-A/B/C/E, CE-E, CC-C which are using L2 control board can be switched to multi split units without any modification needed. Heatpump Model (L2.0) WM-GR The Multi Split mode can be selected at the slide switch on the On/Off Switch Board;...

  • Page 38: Sequential Controller

    ASCON Service Guide Book 6.5 Sequential Controller It is allowed to configure the controller to suit individual’s need with details below: 1. Models For each type, there are 3 models for the control to configure into. Dip switch 1 Dip switch 2 Dip switch 5 a.
  • Page 39 ASCON Service Guide Book 5. Last Memory Functions The power up settings for either with or without the last memory backup is based on the J_LST setting. J_LST Setting a. Last memory backup J_LST Plugged b. Without last memory backup J_LST Removed 6.
  • Page 40 ASCON Service Guide Book 7. Sequential Control for Cool Mode ask Tan CS The starting sequence for indoor fan, outdoor fan and compressors is shown as below: 2 seconds Start Indoor fan 15 seconds 2 seconds Outdoor fan 1 Compressor 1* 15 seconds 2 seconds Outdoor fan 2...
  • Page 41 ASCON Service Guide Book 9. Conversion from Old Sequential Board to New Sequential Board (For wiring up to 1000 meters) 9.1 Sequential Main Board SQMB01 (Old Version) Rework instruction: SQMB01 (Main Board) from old version to new version Step 1: Remove Jumper J1 and J2. Step 2: Add Part: 2051-MAX1483 IC :MAX1483 to U8 J1 &...
  • Page 42 ASCON Service Guide Book 9.3 Sequential Main Board SQMB01 (New Version) Part: 2051-MAX1483 IC :MAX1483 Jumper J1 and J2 removed 9.4 Sequential LCD Panel SQ-LCD (New Version) SQLCD (LCD Panel) from old to new Step 1: Remove Jumper: J1, J2 Step 2: Add Chip Resistor.

  • Page 43: Chilled Water Fan Coil Unit - W1V

    ASCON Service Guide Book 6.6 Chilled Water Fan Coil Unit (W1V3) The standard W1V3 board comes with a VALVE jumper. The system can be configured as the jumper selection listed below: VALVE jumper HEAT jumper √ √ Heatpump Mode & Valve Application √...

  • Page 44: Chilled Water Fan Coil Unit - W2.0

    ASCON Service Guide Book 6.7 Chilled Water Fan Coil Unit (W2.0) The system model can be configured via the following jumpers. For each model selected, the permissible operating modes are as follows: Jumper Configuration Model Operating Modes 2 Pipes without Aux. Heater Heat>Cool>Dry>Fan 2 Pipes with Aux.

  • Page 45: U1.5 L208A Conversion

    ASCON Service Guide Book 6.8 U1.5 L208A Conversion All single split indoor units with U1.5 PCB cannot be directly by the new L208A PCB because of the following:- ACK/A5CK-A/AR & ACK/A5CK-C/CR U1.5PCB - The connector on the PCB (CN6) for the inter-connector cable has 16 pins. L208A PCB - The connector on the PCB (CN5 &...

  • Page 46: Wmf U1.4 To L2Ef Conversion

    ASCON Service Guide Book 6.9 WMF U1.4 to L2EF Conversion 1. The U1.4 PCB can be replaced directly by the new L2EF PCB because no modification needs to be done and the connector pins for both stepper motor and fan motor is still the same as U1.4. 3.

  • Page 47: Service Diagnosis

    ASCON Service Guide Book 7.0 Service Diagnosis 7.1 Self Diagnosis Table Wall Mounted F Series Cooling Only Model Model Board Handset WM 10/15/20/25F, 311 D2.0 LED Indicator Light Display TIMER POWER SLEEP LED Light Diagnosis Table Operation / Faulty Indication Timer On Sleep mode On Dry mode...
  • Page 48 ASCON Service Guide Book Wall Mounted F Series Heat Pump Model Model Board Handset WM 10/15/20/25FR, 301R U1.5 LED Indicator Light Display COOL (Green) (Orange) HEAT / FAN SLEEP (Red / Green) (Red) LED Light Diagnosis Table Operation / Faulty Indication Cooling mode Dry mode Fan mode...
  • Page 49 ASCON Service Guide Book Wall Mounted F Series Cooling Only Model Model Board Handset WM 07/10/15/20/25F L2EF LED Indicator Light Display TIMER Mode POWER ON SLEEP Mode DRY MODE LED Indication Lights: Normal Operation and Faulty Indication Table Operation / Faulty Indication Timer On Sleep mode On Dry mode...
  • Page 50 ASCON Service Guide Book Wall Mounted F Series Heatpump Model Model Board Handset WM 07/10/15/20/25FR, L2EF 311/301R LED Indicator Light Display COOL Mode DRY Mode (Green) (Orange) HEAT / FAN SLEEP Mode Mode (Red) (Red / Green) The heat pump unit is equipped with “auto mode”, whereby the unit will provide reasonable room temperature by switching the unit automatically to either “cool”...
  • Page 51 ASCON Service Guide Book Wall Mounted G Series Model Model Board Handset WM 10/15/20/25G/GR L2.2 G18 / SLM3 / Netware 3 LED Indicator Light Display SLEEP COOL / HEAT TIMER IONIZER LED Light Diagnosis Table Operation / Faulty Indication COOL/HEAT (GREEN/RED) Cooling mode Green...
  • Page 52 ASCON Service Guide Book Wall Mounted J Series Model Model Board Handset WM 09/15J/JR L2GSN Led Indicators Light Display Sleep Cool/ Heat Timer LED Indoor lights: Normal Operation and Fault Conditions for Cooling/ Heat Pump Unit Error Code Operation / Faulty Indication (GREEN/RED) Cooling mode Green...
  • Page 53 ASCON Service Guide Book Ceiling Cassette A / B / C Series Model Model Board Handset CK 20/25/30/40/50A/AR U1.5 G8 / SLM3 / Netware 3 CK 15/20/25B/BR U1.5 G8 / SLM3 / Netware 3 CK 10/15/20C/CR U1.5 G8 / SLM3 / Netware 3 LED Indicator Light Display - Cooling POWER TIMER...
  • Page 54 ASCON Service Guide Book Ceiling Cassette A / B / C/ E Series Model Model Board Handset CK 20/25/30/40/50A/AR L208A G18 / SLM3 / Netware 3 CK 15/20/25B/BR L208A G18 / SLM3 / Netware 3 CK 10/15/20C/CR L208A G18 / SLM3 / Netware 3 CK 20/25/28/40/50E/ER L208A LED Indicator Light Display - Cooling...
  • Page 55 ASCON Service Guide Book Ceiling Exposed D Series Model Model Board Handset CE 20/25/30/40/50D/DR U1.5 G8 / SLM3 / Netware 3 LED Indicator Light Display - Cooling COOL LED Indicator Light Display – Heating COOL HEAT LED Light Diagnostic Table Operation / Faulty Indication Cooling mode Dry mode...
  • Page 56 ASCON Service Guide Book Ceiling Exposed D / E Series Model Model Board Handset CE 20/25/30/40/50D/DR L208A G18 / SLM3 / Netware 3 CE 15/20/25/28E/ER L208A G18 / SLM3 / Netware 3 LED Indicator Light Display - Cooling COOL LED Indicator Light Display – Heating COOL HEAT LED Light Diagnostic Table...
  • Page 57 ASCON Service Guide Book Seven Segment Display – SLM3 / Netware 3 Model Board Handset WM 10/15/20/25FR, 301R U1.5 SLM3 / Netware 3 CK 20 - 50A/AR U1.5 SLM3 / Netware 3 CK 15 - 25B/BR U1.5 SLM3 / Netware 3 CK 10 - 20C/CR U1.5 SLM3 / Netware 3...
  • Page 58 ASCON Service Guide Book Ducted Blower B/C/D/ER Series Model – Single Compressor Rooftop Packaged Air Conditioner – Single Compressor Model Board Handset SB 75 – 100B/BR L208A SLM3 SB 75 – 100D L208A SLM3 SB 75 – 100ER L208A SLM3 SB 125 –...
  • Page 59 ASCON Service Guide Book Ducted Blower B/D/ER Series Model – Multi Compressors Rooftop Packaged Air Conditioner – Multi Compressors Model Board Handset SB 150B2/BR2 – 600B4/BR4 SQ2.0 SQ-LCD SB 125D2 – 500D4 SQ2.0 SQ-LCD SB 125ER2 – 600ER4 SQ2.0 SQ-LCD RT 150 –...
  • Page 60 ASCON Service Guide Book Wall Mounted F Series Inverter-X Model Model Board Handset WMX 10/15FR VA2.0 LED Indicator Light Display Stand-by / COOL / DRY HEAT TIMER LED Light Diagnosis Table Operation / Faulty Indication Cooling mode Dry mode Stand-by / Fan mode Heating mode Auto mode Defrost mode...
  • Page 61 ASCON Service Guide Book Wall Mounted G Series Inverter-X Model Model Board Handset WMX 10/15/20/25G/GR VA2.0 LED Indicator Light Display SLEEP COOL / HEAT TIMER IONIZER LED Light Diagnosis Table Operation / Faulty Indication COOL/HEAT (GREEN/RED) Cooling mode Green Heating mode/ Standby mode (only for heat pump model) Auto mode in operation Orange...
  • Page 62 ASCON Service Guide Book Ceiling Cassette A/C Series Inverter-X Model Model Board Handset CKX 20/25A/AR VA3.0 CKX 10/15/20C/CR VA3.0 LED Indicator Light Display - Cooling POWER TIMER SLEEP LED Indicator Light Display – Heating POWER TIMER HEAT LED Light Diagnostic Table Operation / Faulty Indication Cooling mode Timer On...
  • Page 63 ASCON Service Guide Book Ceiling Convertible E Series Inverter-X Model Model Board Handset CEX 15/20/25E/ER VA3.0 LED Indicator Light Display - Cooling COOL LED Indicator Light Display – Heating COOL HEAT LED Light Diagnostic Table Operation / Faulty Indication Cooling mode Dry mode Fan mode Heating mode...
  • Page 64 ASCON Service Guide Book Seven Segment Display Model Board Handset WMX 10 – 25G/GR VA3.0 SLM3 CKX 20 – 25A/AR VA3.0 SLM3 CKX 10 – 20C/CR VA3.0 SLM3 CEX 15 – 25E/ER VA3.0 SLM3 CCX 10 – 25C/CR VA3.0 SLM3 Cooling / Heat pump Model Seven Segments Faulty Indication...
  • Page 65 ASCON Service Guide Book Inverter - X Outdoor Unit Model Board SLX 10/15/20/25C/CR VB2.0 MSV 25/35A VB2.0 MSX 20/25/30A/AR VB2.0 Normal running / compressor running RED LED blinking No. of Blinks Blinking Indication Normal running, with no limitation Voltage limit Cooling unit: outdoor coil temperature limit Heating unit: indoor coil temperature limit Total current limit...
  • Page 66 ASCON Service Guide Book Chilled Water Fan Coil Unit Model Board Handset WM 05 – 25FW, 301W W1V3 G8 / SLM3 / Netware 3 CK 20 – 50AW/AWH W1V3 G8 / SLM3 / Netware 3 CK 15 – 25BW W1V3 G8 / SLM3 / Netware 3 CK 10 –...
  • Page 67 ASCON Service Guide Book Wall Mounted G Series Model – Water Source Split Unit Model Board Handset 5WMWS 10/15/20/25GR LWS2.0 G18 / SLM3 / Netware 3 LED Indicator Light Display SLEEP COOL / HEAT TIMER IONIZER LED Light Diagnosis Table Operation / Faulty Indication COOL/HEAT (GREEN/RED)
  • Page 68 ASCON Service Guide Book Ceiling Cassette A / B / C Series Model – Water Source Split Unit Model Board Handset 5CKWS 20/25/30/40/50AR LWS2.0 G18 / SLM3 / Netware 3 5CKWS 10/15/20CR LWS2.0 G18 / SLM3 / Netware 3 LED Indicator Light Display – Heating POWER TIMER HEAT...
  • Page 69 ASCON Service Guide Book Seven Segment Display – SLM3 / Netware 3 (Water Source Split Unit) Model Board Handset 5WMWS 10/15/20/25GR LWS2.0 SLM3 / Netware 3 5CKWS 20 - 50A/AR LWS2.0 SLM3 / Netware 3 5CKWS 10 - 20C/CR LWS2.0 SLM3 / Netware 3 5CCWS 10 - 60C/CR LWS2.0...
  • Page 70 ASCON Service Guide Book Inverter-Y Model Indoor Series Model Board Handset A5WMY 10/15/20/25 JR A5CKY 10/15/20CR A5CKY 20/25/28/40/50 ER G18/ GS02 A5CEY 62 CR GS02 A5CEY 20/25/28/40/50 ER G18/ GS02 A5CCY 20/25/28/38/50/60 CR G18/ GS02 LED Indicator Lights: Normal Operation and Fault Conditions for Heat Pump Unit Operation / Faulty Indication COOL/HEAT (GREEN/RED)
  • Page 71 ASCON Service Guide Book Inverter-Y Model Indoor Series Error Code Diagnosis by Wireless Handset G18 Temperature Display Section MODE Button ON TIMER Button TIMER CANCEL Button OFF TIMER Button ON/OFF Button Diagnosis Step 1. Hold down TIMER CANCEL button for 5 seconds, a “ ”...
  • Page 72 ASCON Service Guide Book Error Codes Error Error Description Error Error Description Codes Codes Normal Heat exchanger overheat Compressor sensor system Insufficient gas abnormality DC voltage out of range High pressure switch error Communication error Position sensor abnormality Signal transmission error (on AC current sensor error outdoor unit PCB) Installation error...
  • Page 73 ASCON Service Guide Book Single Split Inverter – Y Model Outdoor Unit Model Board Handset A5LCY 10/15/20/25 DR W_2_03A A5LCY 30/40/50/60 DR W_2_03A Error code diagnosis by Outdoor 7-segment Display In the Y-series model, the 7-segment display section on the outdoor unit indicates the following: 1.
  • Page 74 ASCON Service Guide Book Parameter Number De-ice setting 0-Normal, Other-Active Dew drop setting 0-Normal, Other-Active Heat sink protection zone 0-Normal, Other-Active Turbo setting 0-Normal, Other-Active Silent setting 0-Normal, Other-Active Low ambient zone 0-Normal, Other-Active Defrost status 0-Normal, Other-Active Pump down status 0-Normal, Other-Active O/D output flag 0-Comp off, 1-Comp ON...
  • Page 75 ASCON Service Guide Book Multi Split Inverter – Y Outdoor Unit Model Board Handset A5MSY 25/30 BR Error code diagnosis by Outdoor 7-segment Display The outdoor unit LED indicates the running condition of the system: LED INDICATION Description Green ◑ ● ● ● ● NORMAL INSTALLATION ERROR ANTIFREEZE (OTHER ROOMS)
  • Page 76 ASCON Service Guide Book Wall Mounted K-Series Inverter-Y model Model Board Handset A5WMY 10/15 KR 2P206569-4 APJ2 Indoor LED Indication 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.
  • Page 77 ASCON Service Guide Book CATEGORY CODE DESCRIPTION COOLING-HEATING SWITCHING ERROR CIRCUIT BOARD FAULT OL STARTED FAULTY COMPRESSOR START UP DC FAN MOTOR FAULT OVERCURRENT INPUT HIGH TEMPERATURE DISCHARGE PPE CONTROL HIGH PRESSRUE CONTROL (IN COOLING) OUTDOOR SENSOR FAULT UNIT OPERATION FAULT DUE TO FAULTY POSITION DETECTION SENSOR DC CURRENT SENSOR FAULT FAULTY SUCTION AIR TEMPERATURE SENSOR FAULTY DISCHARGE PIPE TEMPERATURE SENSOR...
  • Page 78 ASCON Service Guide Book Multi Digital Scroll Indoor Units Model Board Handset AWMD 09/10/15/20/25 G MC201-C ACKD 20/25/30/40/50 A MC201-C ACKD 10/15/20 C MC201-C ACCD 10/15/20/25/30/40/50/60 C MC201-C MC301 ACMD 20/25/28 E MC201-C ACMD 40/50 D MC201-C ACMD 62 C MC201-C ADBD 80/100 MC201-A...
  • Page 79 ASCON Service Guide Book Error Diagnosis by Wired Controller (MC301) ITEM CODE DESCRIPTION System malfunction Sensor Broken (TH1 discharge Temp.) Sensor Broken (TH2 inlet coil 1#) Sensor Broken (TH3 mid coil 1#) Sensor Broken (TH4 inlet coil 2#) Sensor Broken (TH5 mid coil 2#) Sensor Broken (TH6 inlet coil 3#) Sensor Broken (TH7 mid coil 3#) Sensor Broken (TH8 ambient temp)
  • Page 80 ASCON Service Guide Book Multi Digital Scroll Outdoor Units Model Board Handset AMDS 30/40/50/60/70 A/AR G18/ MC301 AMDS 80/100/120/150/180/200/240/ G18/ MC301 260/300/320 B/BR A5MDS 80/100/120/140/160/180/ G18/ MC301 200/220/240/260/280/300/320/340/360 /380/400/420/440/460/480/500 B/BR Outdoor Error Code Error code diagnosis by PCB four Digit 7-Segment MDS Outdoor A Series Error Code ITEM CODE...

  • Page 81: General Check

    ASCON Service Guide Book 7.2 General Check When any air conditioner malfunction is noted, immediately switch off the power supply to the unit and contact the local dealer if necessary. Problem Symptom Check Item Suggested Action The unit does not Check the power supply Check to make sure that the rated work...

  • Page 82: General Troubleshooting Guide

    ASCON Service Guide Book 7.3 General Troubleshooting Guide By means of pressure readings Pressure Probable Cause Data Circuit 1. Overcharged with refrigerant. High Side 2. Non-condensable gases in refrigerant circuit (eg. Oil) Low Side 3. Obstructed air-intake / discharge. 4. Short circuit of hot air at condensing unit. 1.
  • Page 83 ASCON Service Guide Book By means of diagnostic flows chart: Generally, there are two kinds of problems, i.e. starting failure and insufficient cooling/ heating. “Starting failure” is caused by electrical defect while improper application or defects in refrigerant circuit causes “insufficient cooling/ heating”. i) Diagnosis of Electric circuit : Faulty : Check...
  • Page 84 ASCON Service Guide Book Change the contactor Coil burnt Condenser fan contactor Contact faulty Change the contacts Fan motor faulty Repair or change the motor contactor Other electrical Repair or change if necessary component faulty Coil burnt Change the contactor Compressor contactor Contact faulty...
  • Page 85 ASCON Service Guide Book ii) Diagnosis of Refrigerant Circuit/ Application There might be some causes where the unit starts to run but does not perform satisfactorily, i.e. insufficient cooling. Judgement could be made by measuring temperature difference of indoor unit’s intake and discharge air as well as running current.
  • Page 86 ASCON Service Guide Book Insufficient Heating Indoor/ outdoor dirty Clean the coil (clogged) Restricted Calculation Indoor air filter dirty Clean the filter Fan motor malfunction Change or repair the motor Obstruction at air inlet/ Remove the obstruction outlet of indoor/ outdoor unit Excessive heat source Remove or reduce heat...
  • Page 87 ASCON Service Guide Book Mini Chiller: Troubleshooting Guide When any malfunction is occurred, immediately switch off the power supply to the unit, and contact the local dealer, if necessary. Some simple troubleshooting tips are given below: Symptoms Possible Causes Remedial Action 1.
  • Page 88 ASCON Service Guide Book Rooftop: Troubleshooting Guide Before you ask for repair service, check the following points Symptoms Switch Box Possible Causes Troubleshooting (Field Supply) It does not run Switch (ON) Power failure Press the switch (ON) • • button after power restoration.

  • Page 89: Appendix

    ASCON Service Guide Book Appendix Resistance – Temperature Characteristics Type DTN-C1 03F3H-OYL 1128, 1148, 1158 Material Name Resistance R25=10.000k + 1.0% - 1.0% B Value B25/30=3450K + 1.0% - 1.0% t°C Rmin (k ) Rnom (k ) Rmax (k ) t°C Rmin (k ) Rnom (k )
  • Page 90 www.acson-international.com...

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