Test Run5 - 13187654326. Caution for Pump Down7. Meaning of Alarm MessagesPossible cause of malfunctionRemote controller is detectingerror signal from indoor unit.Indoor unit is detecting errorsignal from outdoor unit.Improper setting of indoor unit orremote controller.During auto address setting,number of connected units doesnot correspond to number set.When turning on the powersupply, number of connectedunits does not correspond tonumber set.(Except R.C. address is “0.”)Indoor unit communication errorof group control wiring.Alarmmessage<>E04E08<>E12E15E16E20E25E18Indoor unit is detecting error signal from remote controller (and system controller).Error in receiving serial communication signal.(Signal from main indoor unit in case of group control)Ex: Auto address is not completed.Error in transmitting serial communication signal.Error in receiving serial communication signal.When turning on the power supply, the number of connectedindoor units does not correspond to the number set. (Except R.C.address is “0.”)Indoor unit address setting is duplicated.Remote controller address connector (RCU. ADR) is duplicated.(Duplication of main remote controller)Starting auto address setting is prohibited.Error in auto address setting. (Number of connected indoor unitsis less than the number set)Error in auto address setting. (Number of connected indoor unitsis more than the number set)Error of outdoor unit address setting.Error of main indoor unit in receiving serial communication signalfrom sub indoor units.Error of the outdoor unit in receiving serial communication signalfrom the indoor unit.This alarm message shows that the auto address connector CN100is shorted while other RC line is executing auto address operation.No indoor unit is connected during auto address setting.ContinuedLED 1 LED 2 Alarm contentsAlternatingAlarm displayLED 1 blinks M times, then LED 2 blinks N times. The cycle then repeats.M = 2: P alarm 3: H alarm 4: E alarm 5: F alarm 6: L alarmN = Alarm No.Example: LED 1 blinks 2 times, then LED 2 blinks 17 times. The cycle then repeats.Alarm is “P17.”( : Blinking)Serial commu-nication errorsMis-settingCAUTION● This outdoor unit cannot collect more than the rated refrigerant amount as shownby the nameplate on the back.● If the amount of refrigerant is more than that recommended, do not conduct pumpdown. In this case use another refrigerant collecting system.6. Caution for Pump DownPump down means refrigerant gas in the systemis returned to the outdoor unit. Pump down is usedwhen the unit is to be moved, or before servicing therefrigerant circuit.7. Meaning of Alarm MessagesTable of Self-Diagnostics Functions and Description of Alarm DisplaysAlarm messages are indicated by the blinking of LED 1 and 2 (D042, D043) on the outdoor unit PCB. They are also displayedon the wired remote controller.● Viewing the LED 1 and 2 (D042 and D043) alarm displays
