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d2itsu APD-12A Service Manual

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SERVICE MANUAL
APD-12A

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Summary of Contents for d2itsu APD-12A

  • Page 1 SERVICE MANUAL APD-12A...

  • Page 2: Table Of Contents

    CONTENTS 1. PREFACE 1.1 SAFETY PRECAUTIONS..........................1 1.2 INSULATION RESISTANCE TEST......................1 1.3 FEATURES..............................1 1.4 CONTROL LOCATIONS..........................2 2. TROUBLE SHOOTING GUIDE 2.1 REFRIGERATION CYCLE DIAGRAM......................3 2.2 ELECTRIC FUNCTION…..........................3 2.3 TROUBLE SHOOTING GUIDE.........................5 3. WIRING DIAGRAM 3.1 WIRING DIAGRAM FOR COOLING ONLY MODELS................8 3.2 WIRING DIAGRAM FOR COOLING AND HEATING MODELS..............8 3.3 ELECTRICAL CONTROL SCHEME……………………................9 3.4 MAIN CONTROL BOARD SCHEME…………………................10...

  • Page 3: Control Locations

    24 hours on/off mode time setting. and comfortable use. Both temperature mode display Compressors of famous brands are adopted for Separate motor for indoor and outdoor system. reliability and low noise. Multiple uses: dehumidifying and cloth drying. The heating system uses PTC electrical heater Low temperature Drying operation.

  • Page 4: Refrigeration Cycle Diagram

    Remote controller: LCD display. Temperature setting down button: Press this Mode button: Select the operation mode, AUTO, button to decrease temperature COOL, DRY, HEAT (cooling only with setting or adjust the TIMER in a electric heater models only) and FAN. counter-clockwise direction.
  • Page 5 Anti-icing function at cooling mode. 2.2.6.1 The speed of indoor fan can be optionally Temperature sensor err self-diagnose. selected as High/Mid/Low. Both temperature mode display 2.2.6.2 The compressor operate as: 2.2.4 Protection ro om t em per ature (TA) Comp ressor O N 2.2.4.1 The compressor functions protection with TS+1 a delay of three minutes.

  • Page 6: Troubleshooting Guide

    2.2.10.1 The maximum length of Timer is 24 2.2.10.5 TIMER OFF/ON function (OFF TIMER is hours and the minimum is 0.5 hours. earlier than ON TIMER): first turn ON the unit, 2.2.10.2 TIMER ON function: first turn OFF the it will be automatically OFF at set time, and unit, the unit will be automatically ON at the later be ON at the set time.
  • Page 7 No power Check voltage at electrical outlet. Correct if none. Water alarm Check and correct if water alarm happens. Check voltage at the power cord terminal on Main PCB. Replace Power supply cord the power cord if none. Check resistance between the two input/output lines on Transformer (Discharge transformer.
  • Page 8 Air filter Clean or replace if restricted. Realign and assemble if the installation of the air discharging Air discharge pipe pipe failure. Replace if damaged. Determine if the unit is properly sized for the area to be cooled or Unit undersized heated.

  • Page 9: Wiring Diagram

    Wiring diagram APD 12A...

  • Page 10: Electrical Control Scheme

    3.3 ELECTRICAL CONTROL SCHEME:...

  • Page 11: Main Control Board Scheme

    3.4 MAIN CONTROL BOARD SCHEME:...

  • Page 12: Display Board Scheme

    3.5 DISPLAY BOARD SCHEME:...

  • Page 13: How To Disassemble The Unit

    4 HOW TO DISASSEMBLE THE UNIT 4.1 Prepare the unit. Unplug the power cord and disconnect the Air pipe from rear of the unit. Move the unit to a replace where water can be poured. Remove the rubber plug from back of the unit and drainage the water in from the unit.
  • Page 14 Take care to the indoor temperature sensor Screws fix the front panel from side of the unit. attached on the rear board. And be care to the power cord which got through the rear panel. 4.3 To disassemble the display board assembly, just push the clasp and release the assembly.
  • Page 15 Be care to release the connectors which connect to the display board. 4.5 To replace the Main Control board. Remove the screws fixing the enclosure cover. Take care of the wiring diagram on the cover. The wiring diagram is important for reference when wiring.
  • Page 16 4.7 To replace the evaporator fan motor or Remove the fan motor, fan scroll and blower electric heater wheel from the unit. To disassemble the air-out frame. Remove the screws fixing the air-out frame. Lift the frame up then pull the frame forward. Take care to the wires for electric heater.
  • Page 17 4.8 To replace the condenser fan motor 4.9 To repair the refrigerant system or replace Remove the screws fixing the evaporator the compressor Disconnect the water pipe below. Remove the screws fixing the condenser fan Remove the screws fixing the condenser fan motor bracket.
  • Page 18 4.10 To repair the water disposal system or replace the water depth switch or the pump. Remove the screws fixing the supporting board. Remove the screw fixing the pump clamp. Remove the water pipe from the cover. Then, remove the condenser fan scroll. Now, remove the pump and replace.
  • Page 19 Remove the screw fixing the water switch which Then remove the screws fixing the switches and controls the water in tank. replace. Pay attention to the holes. Don’t install into wrong holes. Press the clamp fixing the water switches which control the water in the chassis.

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