Samsung AS07A5MA Service Manual

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Contents

13TroubleshootingΙΙΙΙΙΙ1 Items to be checked first1) The input voltage should be voltage rating 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 five 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 not a symptom relatedto the malfunction of the air conditioner.4) Indoor unit observes operation condition of the air conditioner and displays self diagnosis on thedisplay panel.No. Operation of air conditionerThe STD operation indicator, LED blinks when apower plug of the indoor unit is plugged in at first.1 It indicates power is on. The LED stops blinking if theOn/Off button on the remote control is pushed.In the Cool mode, the compressor does not operateat a room temperature higher than the settingtemperature while the indoor fan operates.23456It happens after three minutes when the compressor isreoperated. The same phenomenon occurs when a poweris on. As a phenomenon that the compressor isreoperated after three minutes, the indoor fan is adjustedautomatically with reference to a temperature of the air.The Fan speed operating is not allowed in the Autoor Dry mode.The speed of the indoor fan is set to LL in the Dry mode.The Fan speed is five steps are selected automatically inthe Auto mode.Compressor stops operating intermittently in the Drymode.The compressor is controlled automatically in the Drymode depending on the room temperature and humidity.Timer LED of the indoor unit lights upand the air conditioner does not operate.The timer is being activated and the unit is in the readymode. The unit operates normally if the timer operation iscancelled.The compressor stops intermittently in the Cool orDry 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.ExplanationNo. DisplaySTD LED blinking (1Hz)TIMER LED blinking (1Hz)STD and TIMER LED blinking (1Hz)NATURE LED blinking (1Hz)All LED blinking (1Hz)12345Restore 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 speed is below 450rpm)Option ErrorSelf Diagnosis