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KStar FocusAir FS012 Series - User Manual

KStar FocusAir FS012 Series
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425684432205D
User Manual
Precision Air Conditioner

Table of Contents

Questions and Answers

  • T
    timothypenningtonAug 19, 2025
    Why is my KStar FocusAir FS012 compressor not starting?
    • A
      andrea11Sep 12, 2025
      The compressor might not be starting due to several reasons: the power may not be turned on, so check the main power switch, fuse, circuit breaker and connecting wires; there could be a power overload, in which case you should manually reset and check the average current; the circuit connection might be loose, so fasten the circuit connector; or the compressor coil could be short-circuited and burned, requiring you to check the motor and replace it if defective.
  • E
    Elizabeth VasquezAug 21, 2025
    What to do if my KStar Air Conditioner fan won’t start?
    • R
      robert77Aug 21, 2025
      If the fan isn't starting, it could be due to several reasons. First, check if there is main power by checking the rated voltage of L1, L2, and L3. Second, the circuit breaker might have tripped, or a fuse blown, so check the fuse and circuit breaker of the main fan. Third, there might be an overload or tripped air-break switch, so reset manually and check the average current. Fourth, a control board failure could be the reason, so check the output from the control end of the motherboard according to the circuit diagram. Finally, the fan itself might be failing, so consider replacing it.
  • C
    Charles ByrdAug 23, 2025
    What to do if KStar Air Conditioner compressor noise is too loud?
    • K
      Katelyn KennedyAug 23, 2025
      Loud compressor noise could be due to lubricating oil loss causing bearing wear, in which case you should add lubricating oil. Alternatively, the compressor or pipeline might be loose, so fasten the fixing clip.
  • B
    Brian HolmesAug 26, 2025
    Why is my KStar FocusAir FS012 Air Conditioner compressor overheating?
    • J
      James FloydAug 26, 2025
      Compressor overheating can occur if the compression ratio is too high, so check the setting of high pressure and low pressure protection value, and check whether the condenser is blocked. It could also be that the suction temperature is too high, in which case you should adjust the expansion valve or add a proper amount of refrigerant.
  • C
    Christina FisherAug 28, 2025
    What to do if suction pressure is low or liquid flows back in KStar Air Conditioner?
    • E
      Erika SmithAug 28, 2025
      Low suction pressure or liquid flowing back could be due to several reasons: there might be insufficient refrigerant in the system, so check for leaks, repair, and add refrigerant; the air filter could be dirty, so replace the filter; the dry filter might be clogged, so replace it; the superheat might be improperly regulated, so adjust in strict accordance with the adjustment steps of the expansion valve; the expansion valve sensing element might be defective, so replace the expansion valve; there could be poor air distribution, so check the air supply and return air system; the condensing pressure might be too low, so check for condenser failure; or liquid flows back.
  • R
    Ricardo DavisAug 30, 2025
    What to do if KStar FocusAir FS012 contactor is closed and compressor does not run?
    • M
      Michael BarnettAug 30, 2025
      If the contactor is closed but the compressor isn't running, it could be because a fuse has blown or the circuit breaker has tripped, so check the line voltage after checking the fuse or circuit breaker and contactor. Another reason could be that the built-in protector of the compressor is disconnected, so check whether the compressor coil is open; it will reset automatically after the coil cools down if this is the case.
  • C
    Christine SanchezSep 1, 2025
    What causes high exhaust pressure in KStar Air Conditioner?
    • Q
      qroblesSep 1, 2025
      High exhaust pressure can be caused by a dirty condenser. Clean the condenser to resolve this issue.
  • M
    millerdeniseSep 3, 2025
    Why is there no dehumidification effect in my KStar FocusAir FS012?
    • D
      David MuellerSep 3, 2025
      A lack of dehumidification could be due to the control system not requiring the dehumidification function, so check the control system state. It may also be caused by the compressor contactor being unable to close or the compressor not operating because the fuse has blown out or the circuit breaker has tripped.
  • S
    Shannon KaufmanSep 5, 2025
    What causes low exhaust pressure in KStar Air Conditioner?
    • J
      Juan JamesSep 5, 2025
      Low exhaust pressure can occur due to refrigerant leaks, so check for leaks, repair, and add refrigerant. It can also be caused by failure of the outdoor fan speed controller, where the output voltage is always full load voltage and does not change with the change of condensing pressure; if this is the case, replace the speed controller immediately.
  • M
    Mary WilsonSep 7, 2025
    What to do if KStar FocusAir FS012 Air Conditioner compressor is not running and contactor is not closed?
    • A
      Ann RoweSep 7, 2025
      If the compressor isn't running and the contactor isn't closed, it could be due to no cooling demand, so check the controller status. It might also be because high pressure protection is activated, so check the high pressure switch and high pressure value.

KStar FocusAir FS012 Series Specifications

General IconGeneral
Cooling Capacity12000 BTU/h
RefrigerantR410A
Power Supply220-240V, 50Hz
TypeSplit System
FeaturesSleep Mode, Timer
Operating Temperature (Cooling)18°C to 43°C