Argo AW720HL Service Manual
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Argo AW720HL Service Manual

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TECHNICAL DATA
& SERVICE MANUAL
INDOOR UNIT: AW720HL
SPLIT SYSTEM AIR CONDITIONER
Model No.
AW720HL
AW726HL
AW735HL
AW726CL
AW735CL
AW726HLF
AW735HLF
AW726CLF
AW735CLF
HEAT PUMP MODELS
AW726HL
AW735HL
AW726HLF
AW735HLF
Product Code No.
38.7004.055
38.7004.056
38.7004.057
38.7004.041
38.7004.042
38.7004.063
38.7004.064
38.7004.065
38.7004.066
0.8180.523.2
January 2010
COOLING MODELS
AW726CL
AW735CL
AW726CLF
AW735CLF

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Summary of Contents for Argo AW720HL

  • Page 1 TECHNICAL DATA & SERVICE MANUAL HEAT PUMP MODELS COOLING MODELS INDOOR UNIT: AW720HL AW726HL AW726CL AW735HL AW735CL AW726HLF AW726CLF AW735HLF AW735CLF SPLIT SYSTEM AIR CONDITIONER Model No. Product Code No. AW720HL 38.7004.055 AW726HL 38.7004.056 AW735HL 38.7004.057 AW726CL 38.7004.041 AW735CL 38.7004.042 AW726HLF 38.7004.063...
  • Page 2 IMPORTANT! • Ground the unit following local electrical codes. • The Yellow/Green wire cannot be used for any connection Please read before installation different from the ground connection. • Connect all wiring tightly. Loose wiring may cause overheating This air conditioning system meets strict safety and operating at connection points and a possible fire hazard.

  • Page 3: Table Of Contents

    Table of Contents Page 1. SPECIFICATIONS 1-1 Unit specifications 1-2 Major Component specifications 1-3 Other Component specifications 2. DIMENSIONAL DATA 3. PERFORMANCE DATA 3-1 Air Throw Distance Chart 4. ELECTRICAL DATA 4-1 Electric Wiring Diagrams 4-2 Wiring System Diagrams 5. FUNCTION 5-1 Cool Mode Operation 5-2 Heat Mode Operation 5-3 Auto (cool/heat) Mode Operation...

  • Page 4: Specifications

    1. SPECIFICATIONS 1-1 Unit Specifications AW720HL 220 - 240 V ~ 50 Hz Power source 230 V - 50 Hz Voltage rating Cooling Heating Performance See catalogue with the requested matching Capacity Air circulation (High) m³/h Features Microprocessor/ I.C. thermostat...
  • Page 5 AW726HL AW726CL AW726HLF AW726CLF 220 - 240 V ~ 50 Hz Power source 230 V - 50 Hz Voltage rating Cooling Heating Performance See catalogue with the requested matching Capacity Air circulation (High) m³/h Features Microprocessor/ I.C. thermostat Controls/Temperature controls Wireless remote control unit Control unit ON/OFF 24 hours...
  • Page 6 AW735HL AW735CL AW735HLF AW735CLF 220 - 240 V ~ 50 Hz Power source 230 V - 50 Hz Voltage rating Cooling Heating Performance See catalogue with the requested matching Capacity Air circulation (High) m³/h Features Microprocessor/ I.C. thermostat Controls/Temperature controls Wireless remote control unit Control unit ON/OFF 24 hours...

  • Page 7: Major Component Specifications

    1-2 Major Component Specifications AW720HL Controller PCB Part No. SAC ON-OFF IDU Microprocessor Controls Control circuit fuse 250 V - 3,15 A 2,54mm-5pcs Jumper setting JP1..JP5 SAC W-REM Remote Control Unit Fan & Fan Motor Cross - flow Type 1…. Ø 95 / L 617 Q'ty …….
  • Page 8 AW726HL AW726CL AW726HLF AW726CLF Controller PCB Part No. SAC ON-OFF IDU Microprocessor Controls Control circuit fuse 250 V - 3,15 A 2,54mm-5pcs Jumper setting JP1..JP5 SAC W-REM Remote Control Unit Fan & Fan Motor Cross - flow Type 1…. Ø 95 / L 617 Q'ty …….
  • Page 9 AW735HL AW735CL AW735HLF AW735CLF Controller PCB SAC ON-OFF IDU Part No. Microprocessor Controls 250 V - 3,15 A Control circuit fuse 2,54mm-5pcs Jumper setting JP1..JP5 SAC W-REM Remote Control Unit Fan & Fan Motor Cross - flow Type 1…. Ø 95 / L 617 Q'ty …….

  • Page 10: Other Component Specifications

    1-3 Other Component Specifications A040C5026AA Trasformer (TR) AC 230 V, 50 Hz Rating Primary 13 V - 5VA Secondary Capacity Ω (at 25°C) Primary: - Coil resistance Secondary: - 120°C Thermal cut-off temp. NTC-THERMISTOR Thermistor ( Coil sensor ) 10 at 25 °C Resistance kΩ...

  • Page 11: Dimensional Data

    2. DIMENSIONAL DATA AW720HL AW726HL AW735HL AW726CL AW735CL 12,7 (1/2") AW735 AW720-726...
  • Page 12 AW726HLF AW735HLF AW726CLF AW735CLF...

  • Page 13: Performance Data

    3. PERFORMANCE DATA 3-1 Air Throw Distance Chart AW720HL Cooling Room air temp. : 27°C Fan speed High Horizontal distance (m) : Flap angle 0° , : Axis air velocity 0° : Flap angle 30°, : Axis air velocity 30°...
  • Page 14 AW726HL AW726CL AW726HLF AW726CLF Cooling Room air temp. : 27°C Fan speed High Horizontal distance (m) : Flap angle 0° , : Axis air velocity 0° : Flap angle 30°, : Axis air velocity 30° Heating Room air temp. : 20°C Fan speed High...
  • Page 15 AW735HL AW735CL AW735HLF AW735CLF Cooling Room air temp. : 27°C Fan speed High Horizontal distance (m) : Flap angle 0° , : Axis air velocity 0° : Flap angle 30°, : Axis air velocity 30° Heating Room air temp. : 20°C Fan speed High...

  • Page 16: Electrical Data

    4. ELECTRICAL DATA 4-1 Electric Wiring Diagrams HEAT PUMP MODELS COOLING MODELS...

  • Page 17: Wiring System Diagrams

    4-2 Wiring System Diagram HEAT PUMP MODELS COOLING MODELS...

  • Page 18: Function

    5.FUNCTION 5-1 Cool Mode Operation In Cooling Mode, the operation of the compressor (CM), Outdoor Fan (FMO) and Indoor Fan (FMI) are determined by the difference between the room air temperature (RAT) and the set point temperature (SPT) as shown in the graph. NOTES 1.

  • Page 19: Heat Mode Operation

    5-2 Heat Mode Operation HEAT PUMP MODELS The Heating mode operation is similar to the Cooling mode operation. The CM, FMO and FMI are mainly controlled by the value of (RAT – SPT). In the graph above, the FMI is operating in AUTO speed mode. Therefore, the FMI speed changes automatically according to the (RT - SPT).

  • Page 20: Auto (Cool/Heat) Mode Operation

    5-3 Auto (cool/heat) Mode Operation HEAT PUMP MODELS In Auto Mode, the unit switches automatically between the Auto Cooling and Auto Heating in order to maintain the room temperature (RAT) at the prescribed set point (SPT). The switching between the two modes is according to the above graph. Refer to the sections 5.1 COOLING MODE and 5.2 HEATING MODE for system operation details.

  • Page 21: Dry Mode Operation

    5-4 Dry Mode Operation Dry operation remove moisture from indoor air running, in cooling mode, at a low level without reducing the ambient temperature. This is done cycling ON and OFF indoor and outdoor units according to below. ROOM DRY LEVEL TEMP Operation according to COOLING mode ≥...

  • Page 22: Forced-Made

    5-7 Forced Mode In this mode the system operates (COOLING or HEATING mode – fixed settings) or is switched off by means of the MODE button of the indoor unit control board. The operation modes can be selected pressing the button in a cyclic way (OFF COOL HEAT OFF…).

  • Page 23: Protection Operation In Heat Mode

    5-9 Protection operations in Heat Mode HEAT PUMP MODELS 5-9.1 Cold draft This feature prevents the supply of cold air forcing the indoor fan to a speed which cannot be changed by the user. As soon as the protection mode is exited speed can be changed manually through the remote controller.
  • Page 24 5-9.3 Overheat This feature prevents the build up of high pressure in the indoor heat exchanger during heating operation AW726CL AW735CL AW720HL AW726HL AW735HL A (°C) B (°C) C (°C)

  • Page 25: I Feel Function

    5-10 I FEEL Function As standard configuration the air conditioner operates detecting the room temperature through the sensor equipped in the wireless remote controller (icon I FEEL shown on the display). This feature provides a personalised environment since the temperature can be detected where the remote controller is located. It is possible to de-activate this option pressing the I FEEL button on the remote controller.

  • Page 26: Diagnostic

    5-12 Diagnostic With this feature is possible to have a visual signal that a trouble is occurring. This mode is always active and the signalling is made through the display board LEDS . In case of no troubles the LEDS status follows its normal function. NOTES The troubles are showed according a priority list that is in case of more than one trouble present, is always showed, at first, the one with the highest priority (1...

  • Page 27: Jumpers Configuration

    5-13 JUMPERS CONFIGURATION Jumpers are located on the indoor PCB near the MODE button. HEAT PUMP MODELS COOLING MODELS Unit is shipped with jumpers set according to the following table: JUMPER STATUS HEAT PUMP MODELS COOLING MODELS open open open closed open open...

  • Page 28: Contacts For Building Automation

    5-14 CONTACTS FOR BUILDING AUTOMATION 5-14.1 INPUT CONTACT (J4 - green) The status of this input affects system operation according to the following: Contact OPEN : system does not operate (always OFF) – inputs from wireless remote controller are not processed Contact CLOSED: system operates in the normal way according to the inputs coming from wireless remote controller 5-14.2 OUTPUT CONTACT (J12) This connector is directly tied to the contact (normally open) of a power relay which activates every time the following alarm...

  • Page 29: Maintenance

    5-15 MAINTENANCE Changing the Address of the Air Conditioner In case of more than one air conditioner operating in the same room, it may be necessary to assign an address to each unit in order to avoid operation conflicts. Address is set acting on the dip-switches located on the indoor PCB and on the remote controller.

  • Page 30: Troubleshooting

    TROUBLESHOOTING 6-1 CHECK BEFORE AND AFTER «TROUBLESHOOTING» (A) Check power supply wiring. • Check the power supply wires are correctly connected. (B) Check power supply. • Check that voltage is in specified range (±10% of the rating). • Check that power is being supplied. •...

  • Page 31: Unit And Compressor Do Not Run

    2 • The unit does not run. 6-4 UNIT AND COMPRESSOR DO NOT RUN. The unit does not run when air conditioner is in the follwing conditions: • When the room temperature is below the setting temperature. • During the protection modes.

  • Page 32: Some Parts Of The Air Conditioner Do Not Operate

    6-5 SOME PARTS OF THE AIR CONDITIONER DO NOT OPERATE.

  • Page 33: Air Conditioner Operates, But Abnormalities Aer Observed

    6-6 AIR CONDITIONER OPERATES, BUT ABNORMALITIES ARE OBSERVED.

  • Page 35: Poor Cooling Or Heating

    6-7 POOR COOLING OR HEATING.

  • Page 36: Excessive Cooling Or Hating

    6-8 EXCESSIVE COOLING OR HEATING. 6-9 A SENSOR IS DEFECTIVE.

  • Page 37: Checking Eletrical Components

    7 CHECKING ELECTRICAL COMPONENTS 7-1 Measurement of Insulation Resistance The insulation is in good condition if the resistance exceeds 1 MOhm a) Power Supply Wires Clamp the earthed wire of the power supply wires with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the power wires (fig.1).

  • Page 38: Checking Continuity Of Fuse On Pcb Assy

    7-2 Checking Continuity of fuse on PCB assy Remove PCB assy from electrical component box (fig.5) Then pull out the fuse from PCB assy Check continuity of fuse by the multimeter (fig.6) 7-3 Checking Motor Capacitor Remove the lead wires from the capacitor terminals, and then place a probe on the capacitor terminals as shown in fig.7.
  • Page 39 Via Varese, 90 - 21013 Gallarate - Va - Italy Tel. +39 0331 755111 - Fax +39 0331 776240 www.argoclima.com,...

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