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PAC1203711
PAC1803711
PAC2403711

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Summary of Contents for Premium PAC1203711

  • Page 1: Service Manual

    Service Manual PAC1203711 PAC1803711 PAC2403711...

  • Page 2: Table Of Contents

    CONTENTS 1. Precaution ..............................3 1.1 Safety Precaution .......................... 3 1.2 Warning ............................3 2. Function ................................ 7 3. Dimension ..............................8 3.1 Indoor Unit ............................. 8 3.2 Outdoor Unit ..........................11 4. Refrigerant Cycle Diagram ........................12 5 Installation Details ............................13 5.1 Wrench torque sheet for installation ...................

  • Page 3: Precaution

    1. Precaution 1.1 Safety Precaution  To prevent injury to the user or other people and property damage, the following instructions must be followed.  Incorrect operation due to ignoring instruction will cause harm or damage.  Before service the unit, be sure to read this service manual at first. 1.2 Warning ...
  • Page 4  For installation, always contact the dealer or an authorized service center.  Do not install the product on a defective installation stand.  Be sure the installation area does not deteriorate with age. If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury.
  • Page 5  Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.) There is risk of physical injury, electric shock, or product failure.  When the product is soaked, contact an authorized service center. There is risk of fire or electric shock.
  • Page 6  Operational  Do not expose the skin directly to cool air for long time. (Do not sit in the draft).  Do not use the product for special purposes, such as preserving foods, works of art etc. It is a consumer air conditioner, not a precision refrigerant system. There is risk of damage or loss of property.

  • Page 7: Function

    2. Function Model Names of Indoor/Outdoor Units Capacity Indoor units Outdoor units PAC1203711 PAC1203711 PAC1803711 PAC1803711 On-Off PAC2403711 PAC2403711...

  • Page 8: Dimension

    3. Dimension 3.1 Indoor Unit Model PAC1203711 PAC1803711 1045 PAC2403711...
  • Page 9 Model L(mm) R(mm) H(mm) Dimension of installation hole(mm) PAC1203711 ￠65 PAC1803711...
  • Page 10 L(mm) R(mm) H(mm) Dimension of installation hole(mm) Model ￠65 PAC2403711...

  • Page 11: Outdoor Unit

    3.2 Outdoor Unit More than 30cm More than 60cm (Service space) More than 30cm More than 60cm More than 200cm Model PAC1203711 PAC1803711 PAC2403711...

  • Page 12: Refrigerant Cycle Diagram

    4. Refrigerant Cycle Diagram For cooling only models: INDOOR OUTDOOR LIQUID SIDE CAPILIARY TUBE HEAT EXCHANGE (EVAPORATOR) HEAT T1 Room temp. EXCHANGE sensor (CONDENSER) T2 Evaporator temp. sensor GAS SIDE ACCUMULATOR COMPRESSOR...

  • Page 13: Installation Details

    5 Installation Details 5.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque inch N.cm N.cm Ф6.35 1500(153kgf.cm) 1600(163kgf.cm) Ф9.52 2500(255kgf.cm) 2600(265kgf.cm) Ф12.7 3500(357kgf.cm) 3600(367kgf.cm) Ф15.9 4500(459kgf.cm) 4700(479kgf.cm) Ф19 6500(663kgf.cm) 6700(683kgf.cm) 5.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Rated current of appliance Nominal cross-sectional area (mm²...

  • Page 14: Pipe Length And The Elevation

    Max. Max. Additional Model length Elevation Length refrigerant B (m) A (m) (g/m) Liquid 1/4’’ 1/2’’ PAC1203711+ PAC1203711 (Ф12.7) (Ф6.35) 1/4’’ 1/2’’ PAC1803711+ PAC1803711 (Ф12.7) (Ф6.35) 3/8’’ 5/8’’ PAC2403711+ PAC2403711 (Ф15.9) (Ф9.52) Caution: The capacity test is based on the standard length and the maximum permissive length is based on the...

  • Page 15: Installation For The First Time

    5.4 Installation for the first time Air and moisture in the refrigerant system have undesirable effects as below: ● Pressure in the system rises. ● Operating current rises. ● Cooling or heating efficiency drops. ● Moisture in the refrigerant circuit may freeze and block capillary tubing. ●...
  • Page 16 1) Completely tighten the flare nuts of the indoor and outdoor units, confirm that both the 2-way and 3-way valves are set to the closed position. 2) Connect the charge hose with the push pin of handle lo to the 3-way valves gas service port.. 3) Connect the charge hose of handle hi connection to the vacuum pump.
  • Page 17 Procedure: 1). Confirm that both the 2-way and 3-way valves are set to the closed position. 2). Connect the charge set and a charging cylinder to the service port of the 3-way valve. 3). Air purging. Open the valves on the charging cylinder and the charge set. Purge the air by loosening the flare nut on the 2-way valve approximately 45’...
  • Page 18 3. Adding the refrigerant if the pipe length >5m Electronic scale Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve. Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.

  • Page 19: Adding The Refrigerant After Running The System For Many Years

    5.5 Adding the refrigerant after running the system for many years Electronic scale Procedure: 1). Connect the charge hose to the 3-way service port, open the 2-way valve and the 3-way valve. Connect the charge hose to the valve at the bottom of the cylinder. If the refrigerant is R410A, make the cylinder bottom up to ensure liquid charge.

  • Page 20: Re-Installation While The Indoor Unit Need To Be Repaired

    5.6 Re-installation while the indoor unit need to be repaired 1. Collecting the refrigerant into the outdoor unit Procedure 1). Confirm that both the 2-way and 3-way valves are set to the opened position Remove the valve stem caps and confirm that the valve stems are in the opened position. Be sure to use a hexagonal wrench to operate the valve stems.
  • Page 21 2. Air purging by the refrigerant Procedure: 1). Confirm that both the 2-way and 3-way valves are set to the closed position. 2). Connect the charge set and a charging cylinder to the service port of the 3-way valve Leave the valve on the charging cylinder closed. 3).

  • Page 22: Re-Installation While The Outdoor Unit Need To Be Repaired

    Be sure to use a torque wrench to tighten the service port cap to a torque 18N.m. Be sure to check the gas leakage. 5.7 Re-installation while the outdoor unit need to be repaired 1. Evacuation for the whole system Procedure: 1).
  • Page 23 2. Refrigerant charging Electronic scale Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.
  • Page 24 Use torque wrench to tighten the service port cap to a torque of 18N.m. Be sure to check for gas leakage...

  • Page 25: Operation Characteristics

    6. Operation Characteristics CAUTION: 1. If the air conditioner is used beyond the above conditions, certain safety protection features may come into operation and cause the unit to operate abnormally. 2. The room relative humidity should be less than 80%. If the air conditioner operates beyond this figure, the surface of the air conditioner may attract condensation.

  • Page 26: Electronic Function

    7. Electronic function 7.1 Abbreviation T1: Indoor room temperature T2: Coil temperature of evaporator T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature 7.2 Display function 7.2.1 Icon explanation on indoor display board. ION indication lamp(optional function)：This lamp illuminates when Clean Air feature is activated.

  • Page 27: Main Protection

    7.3 Main Protection 7.3.1 Time Delay at restart for compressor. 7.3.2 Sensor protection at open circuit and breaking disconnection. 7.3.3 Zero crossing detection error protection If AC can not detect zero crossing signal for 4 minutes or the zero crossing signal time interval is not correct, the unit will stop and the LED will display the failure.

  • Page 28: Operation Modes And Functions

    7.4 Operation Modes and Functions 7.4.1 Fan mode (1) Outdoor fan and compressor stop. (2) Temperature setting function is disabled, and no setting temperature is displayed. (3) Indoor fan can be set to high/med/low/auto. (4) The louver operates the same as in cooling mode. (5) Auto fan: High Medium...
  • Page 29 protection in cooling mode, defrosting mode and the current protection. 7.4.2.3 Indoor fan running rules In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low and auto. The auto fan: T1-Ts High Medium 7.4.2.4 Low evaporator coil temperature T2 protection...
  • Page 30 Compressor Off Compressor On When high condenser temp. T3 is more than setting value, the compressor will stop. During the protection, the outdoor fan keeps working. 7.4.3 Heating Mode(for heat pump models) 7.4.3.1 Compressor running rules When indoor room temp.T1 is higher than setting value the compressor and outdoor fan will shut off.
  • Page 31 wind function has the priority. Auto fan action: T1-TS Medium The indoor fan speed will adjust according to the value of T1-T 7.4.3.4 Defrosting mode： During the defrosting mode, the compressor keep running, indoor and outdoor motor will stop, defrost lamp of the indoor unit will be lighted “ .”...
  • Page 32 T1-Ts Cooling Fan only Heating* Heating*: For cooling only models, they will run at fan speed AC will run in auto mode in the below cases: （1） Pressing the forced auto button. （2） If AC is off, it will run in auto mode when the timer on function is active. （3）...
  • Page 33 The forced operation function cannot be memorized if power off.  7.4.7 Auto-Restart function The indoor unit is equipped with auto-restart function, which is carried out through an auto-restart module. In case of a sudden power failure, the module memorizes the setting conditions before the power failure.

  • Page 34: Troubleshooting

    8. Troubleshooting 8.1 Indoor Unit Error Display Operation lamp Timer lamp Display LED STATUS ☆ 1 time EEPROM parameter error ☆ 2 times Zero-crossing signal detection error ☆ 3 times Indoor fan speed has been out of control Indoor room temperature sensor T1 open circuit or short ☆...

  • Page 35: Diagnosis And Solution

    8.2 Diagnosis and Solution 8.2.1 EEPROM parameter error diagnosis and solution Power off, then restart the unit 2 minutes later. Replace the indoor/outdoor main PCB. EEPROM: a read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
  • Page 36 8.2.2 Zero crossing detection error diagnosis and solution Power off, then restart the unit 2 minutes later Indoor main PCB is defective. Replace indoor main PCB. 8.2.3 Indoor fan speed has been out of control diagnosis and solution Power off, then restart the The unit operates normally.
  • Page 37 Index 1: 1. Indoor AC Fan Motor Measure the resistance value of each winding by using the tester. For the resistance value of the motor, please contact the technical engineer. Index2: 1: Indoor AC Fan Motor Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin1 and pin2.
  • Page 38 8.2.4 Open circuit or short circuit of temperature sensors diagnosis and solution Check the connection between temperature Correct the connection sensor and PCB. Measure the resistance Repalce the sensor value of the sensor Replace indoor or outdoor main PCB...
  • Page 39 8.2.5 Refrigerant leakage detection diagnosis and solution Power off, then restart the unit 2 minutes later. Check cool air blowing out Check if T2 sensor from indoor air outlet Replace indoor PCB. Check leakage of system Repair the leakage and recharge the refrigerant.
  • Page 40 8.2.6 Indoor / outdoor unit’s communication error diagnosis and solution Power off, then restart the unit 2 minutes later Power off, then restart the unit 2 minutes later Measure Vs, is it positive fluctuation? Measure Vs, is it positive fluctuation? (Vs is the voltage between S and N of (Vs is the voltage between S and N of outdoor unit.
  • Page 41 Main parts check 1. Temperature sensor checking Disconnect the temperature sensor from PCB, measure the resistance value with a tester. Temperature Sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor discharge temp.(T5) sensor. Measure the resistance value of each winding by using the multi-meter.

This manual is also suitable for:

Pac1803711Pac2403711

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