4.1 “A0” Indoor Unit: Error of External Protection Device

4.2 “A1” Indoor Unit: PC Board Defect

4.3 “A3” Indoor Unit: Malfunction of Drain Level Control System (S1L)

4.4 “A6” Indoor Unit: Fan Motor (M1F) Lock, Overload .

4.5 “A7” Indoor Unit: Malfunction of Swing Flap Motor (MA).

4.6 “A9” Indoor Unit: Malfunction of Moving Part of Electronic Expansion Valve (20E)..

4.7 “AF” Indoor Unit: Drain Level above Limit ..

4.8 “AJ” Indoor Unit: Malfunction of Capacity Determination Device..

4.9 “C4” Indoor Unit: Malfunction of Thermistor (R2T)for Heat Exchanger .

4.10 “C5” Indoor Unit: Malfunction of Thermistor (R3T) for Gas Pipes .

4.11 “C9” Indoor Unit: Malfunction of Thermistor (R1T) for Suction Air ..

4.12 “CJ” Indoor Unit: Malfunction of Thermostat Sensor in Remote Controller

4.13 “E1” Outdoor Unit: PC Board Defect.

4.14 “E3” Outdoor Unit: Actuation of High Pressure Switch.

4.15 “E4” Outdoor Unit: Actuation of Low Pressure Switch

4.16 “E5” Outdoor Unit: Compressor Motor Lock.

4.17 “E7” Outdoor Unit: Malfunction of Outdoor Unit Fan Motor

4.18 “E9” Outdoor Unit: Malfunction of Moving Part of Electronic Expansion Valve

4.19 “F3” Outdoor Unit: Abnormal Discharge Pipe Temperature.

4.20 “H9” Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air

4.21 “J3” Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R3T)

4.22 “J5” Outdoor Unit: Malfunction of Thermistor (R2T) for Suction Pipe

4.23 “J6” Outdoor Unit: Malfunction of Thermistor (R4T) forOutdoor Unit Heat Exchanger Deicer

4.24 “J9” Outdoor Unit: Malfunction of Subcooling Heat Exchanger Gas Pipe Thermistor (R5T)

4.25 “JA” Outdoor Unit: Malfunction of High Pressure Sensor

4.26 “JC” Outdoor Unit: Malfunction of Low Pressure Sensor

4.27 “L4” Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise

4.28 “L5” Outdoor Unit: Inverter Compressor Abnormal

4.29 “L8” Outdoor Unit: Inverter Current Abnormal

4.30 “L9” Outdoor Unit: Inverter Start up Error

4.31 “LC” Outdoor Unit: Malfunction of Transmission between Inverter and Control PC Board

4.32 “P4” Outdoor Unit: Malfunction of Inverter Radiating Fin Temperature Rise Sensor

4.33 “PJ” Outdoor Unit: Faulty Combination of Inverter and Fan Driver .

4.34 “UO” Outdoor Unit: Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion Valve Failure

4.35 “U2” Outdoor Unit: Power Supply Insufficient or Instantaneous Failure

4.36 “U3” Outdoor Unit: Check Operation not Executed

4.37 “U4” Malfunction of Transmission between Indoor Units and Outdoor Units.

4.38 “U5” Indoor Unit: Malfunction of Transmission between Remote Controller and Indoor Unit

4.39 “U8” Indoor Unit: Malfunction of Transmission between Main and Sub Remote Controllers..

4.40 “U9” Indoor Unit: Malfunction of Transmission between Indoor Units and Outdoor Units in the Same System ..

4.41 “UA” Improper Combination of Indoor Units and Outdoor Units, Indoor Units and Remote Controller .

4.42 “UC” Address Duplication of Centralized Controller

4.43 “UE” Malfunction of Transmission between Centralized Controller and Indoor Unit

4.44 “UF” System is not Set yet

4.45 “UH” Malfunction of System, Refrigerant System Address Undefined

5. Troubleshooting by Indication on the Central Remote Controller

5.1 “M1” PC Board Defect

5.2 “M8” Malfunction of Transmission between Optional Controllers for Centralized Control

5.3 “MA” Improper Combination of Optional Controllers for Centralized Control .

5.4 “MC” Address Duplication, Improper Setting.

6. Troubleshooting by Indication on the Unified ON/OFF Controller..

6.1 Operation Lamp Blinks..

6.2 Display “Under Centralized Control” Blinks (Repeats Single Blink)

6.3 Display “Under Centralized Control” Blinks (Repeats Double Blink).

7.1 “UE” Malfunction of Transmission between Centralized Controller and Indoor Unit .

7.2 “M1” PC Board Defect

7.3 “M8” Malfunction of Transmission between Optional Controllers for Centralized Control

7.4 “MA” Improper Combination of Optional Controllers for Centralized Control

7.5 “MC” Address Duplication, Improper Setting