Samsung AQ18A9(0)RCF Service Manual

Also see for AQ18A0RCF: Owner's instructions Owner's instructions Owner's instructions

Contents

15TroubleshootingΙΙΙ1 Items to be checked first1) The input voltage should be rating voltage within ±10% range.The air conditioner may not operate properly if the voltage is out of this range.2) Is the connection cable linking the indoor unit and the outdoor unit properly?The indoor unit and the outdoor unit shall be linked by seven cables.Check the terminals if the indoor unit and outdoor unit are properly linked by the same number of cables.Otherwise the air conditioner may not operate properly.3) When a problem occurs due to the contents illustrated in the table below, it is a symptom not related tothe malfunction of the air conditioner.4) Indoor unit observes operation condition of the air conditioner, and displays self diagnosis detailson the display panel.No. Operation of air conditionerThe STD operation indicator, LED blinks when a powerplug of the indoor unit is plugged in at first.1 It indicates power is on. The LED stops blinking if the operationOn/Off button on the remote control is pushed.In the Cool mode, the compressor does not operate ata room temperature higher than the setting temperaturewhile the indoor fan operates.In the Heat mode, the compressor does not operate ata room temperature lower than the setting temperaturethat indoor fan should operate.23456It happens after three minutes when the compressor isreoperated. The same phenomenon occurs when a power is on.As a phenomenon that the compressor is reoperated after threeminutes, the indoor fan is adjusted automatically with referenceto a temperature of the air.The Fan speed operating is not allowed in theAuto or Dry mode.The speed of the indoor fan is set to LL in the Dry mode.Fan speed is five steps are selected automatically in the Auto mode.Compressor stops operating intermittently in theDry mode.Compressor operation is controlled automatically in the Drymode depending on the room temperature and humidity.Compressor of the outdoor unit is operatingalthough it is turned off in the Heat mode.When the unit is turned off while de-ice is activated,the compressor continues operating for up to 9 minutes(maximum) until the deice is completed.Only timer LED of the indoor unit lights up and the airconditioner does not operate.The Timer is being activated and the unit is in the ready mode.The unit operates normally if the timer operation is cancelled.ExplanationNo. DisplaySTD LED blinking (1Hz)TIMER LED blinking (1Hz)STD and TIMER LED blinking (1Hz)BIO LED blinking (1Hz)STD, BIO and TIMER LED blinking(1Hz)All LED blinking(1Hz)123456Restore from power failure (input initial power)Indoor unit Room sensor Error (open or short)Indoor unit heat exchanger temperature sensor Error (open or short)Indoor fan malfunctioning (for spead is Below 450rpm)EEPROM ErrorOption Error (option wasn’t setup or option data error)Self Diagnosis78The compressor and indoor fan stop intermittently inthe Heat mode.The compressor and indoor fan stop intermittently if roomtemperature exceeds a setting temperature in order to protectthe compressor from overheated air in a Heat mode.Indoor fan and outdoor fan stop operating intermittentlyin the Heat mode.The compressor operates in a reverse cycle to remove exteriorice in the Heat mode, and indoor fan and outdoor fan do notoperate intermittently for within 20% of the total heater operation9The compressor stops intermittently in the Cool modeor Dry mode and the fan speed of the indoor unitdecreases.The compressor stops intermittently or the fan speed of theindoor unit decreases to prevent inside/outside air fromfreezing depending on the inside/outside air temperature.