Carrier 40WAU Series Installation And Maintenance Instructions Manual

Table 5 -- LED Display IndicatorsERROR CODE MODE/STATUS[NO ERROR]E0E1E2E3E4E7EdEEFELED DISPLAYOperation Light ONOperation Light OFFOperation Light Flashing Slow*Timer Light ONTimer Light OFFDefrost / Fan Light ONDefrost / Fan Light OFFDefrost / Fan Light Flashing FasttTimer Light Flashing FastOperation Light Flashing FastDefrost / Fan Light Flashing SlowAlarm Light Flashing SlowAlarm Light Flashing FastOperation and Timer Lights Flashing Fast*Flashing Slow = Flashing once per second,tFlashing Fast = Flashing twice per second.Table 6 -- TroubleshootingERROR DISPLAYStartingShutdownStandbyTiming ONTiming OFFSystem Defrost ONSystem Defrost OFFHeating / Cooling Mode Conflict ErrorCommunication Error Between Indoor and Outdoor UnitCheck Indoor Ambient Temperature Sensor (T1)Check Evaporator Temperature Sensor (T2)Check Evaporator Outlet Temperature Sensor (T2B)EEPROM Error (Data Storage)Outdoor Unit ErrorWater Level ErrorIndoor Unit Turned ON But Does Not Have An AddressEOE1E2, E3,E4Defrost Light Flashing Fast (Heating/Cooling Mode Conflict Error)Timer Light Flashing Fast(Communication Error)Operation Light Flashing Fast(Sensor Error)POSSIBLE CAUSESSystem is in cooling or fan only mode andheating signal is received from a unit on thesystem,System is in heating mode and cooling sig-nal is received from a unit on the system,Signal wires are short-circuited ordisconnected,Signal wire order is incorrect,Signal wires crossing over high voltage_ower wires.Signal wire close to electromagnetic source.Signal wire length exceeds 360 ft.PC board fault.Loose connection at port on PC board.Sensor is short-circuited.PC board fault.Chip or PC board fault.Defrost Light Flashing Slow(EEPROM Error)Alarm Light Flashing Slow (OutdoorUnit Error)POSSIBLE SOLUTIONSAll units should be in cooling mode for system tostay in cooling mode,All units should be in heating mode,Check or reconnect signal wire,E7Ed Outdoor unit fault, Refer to outdoor unit troubleshooting guide,Alarm Light Flashing Fast (WaterLevel Error)Loose connection or disconnected at porton PC board.Water level float is stuck.Trap slope is too steep.Drain pipe is too long.Drain pump faulty.Indoor unit without address,Operation and Timer Lights FlashingFast Together(Address Error)EEFECorrect signal wire order.Separate and distance the signal wire from highvoltage power wires.Distance signal wires from electromagneticsource.Reduce the signal wire length.Replace PC board.Tighten the connection at port on PC board.Using multi-meter, measure resistance of the sen-sor. If the resistance is < 100 ohms, change thesensor.Replace PC board.Replace PC board.Tighten the connection or reconnect at port on PCboard,Inspect the float,Adjust the trap slope,Adjust the length of drain pipe,Replace the drain pump,Run automatic addressing option at the outdoorunit,Use remote wireless or wired controller to re-address indoor unit,]!

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