DAIKIN MALFUNCTION CODES
Code Place Description
AO Indoor Error of external protection device
A1 Indoor PCB defect
A3 Indoor Malfunction of drain Level control system
A5 Indoor Freeze-up prevention
A6 Indoor Fan motor lock, Overload
A7 Indoor Malfunction of swing motor flap
A9 Indoor Malfunction of EEV
AF Indoor Drain level above limit (clogging)
AJ Indoor Malfunction of capacity set device
C3 Indoor Malfunction of drain thermistor
C4 Indoor Malfunction of liquid pipe thermistor
C5 Indoor Malfunction of gas pipe thermistor
C7 Indoor Lower louvre limit switch/motor
C9 Indoor Malfunction of air thermistor
CC Indoor Malfunction of moisture sensor
CA Indoor Malfunction of discharge air thermistor
CJ Indoor Malfunction of remote control thermistor
CE Indoor Malfunction of radiant heat sensor
E0 Outdoor Activation of outdoor safety device
E1 Outdoor PCB defect
E3 Outdoor Activation of high pressure switch
E4 Outdoor Activation of low pressure switch
E5 Outdoor Activation of compressor over heat protection
E5 Outdoor Compressor motor lock
E6 Outdoor Compressor start up error
E6 Outdoor Standard compressor lock/overcurrent
E7 Outdoor Fan motor lock, Overload
E8 Outdoor Inverter input overcurrent
E9 Outdoor Malfunction of EEV
EA Outdoor Four way valve defective.
F3 Outdoor Abnormal discharge pipe temperature
F6 Outdoor Refrigerant overcharged
FC Outdoor Low pressure drop.
H3 Outdoor High pressure switch defect
H4 Outdoor Low pressure switch defect
H6 Outdoor Compressor motor position detection sensor error
H7 Outdoor Fan motor position detection sensor error
H8 Outdoor Current transformer error
H9 Outdoor Malfunction of air thermistor
J1 Outdoor Malfunction of pressure sensor
J2 Outdoor Current sensor malfunction
J3 Outdoor Malfunction of discharge pipe thermistor
J4 Outdoor Low pressure saturation thermistor
J5 Outdoor Malfunction of suction pipe thermistor
J6 Outdoor Malfunction of heat exchanger thermistor
J7 Outdoor Malfunction of heat exchanger liquid thermistor
J8 Outdoor Malfunction of liquid pipe thermistor
J9 Outdoor Malfunction of gas pipe thermistor
JA Outdoor Malfunction of discharge pipe pressure sensor
JC Outdoor Malfunction of suction pipe pressure sensor
JH Outdoor Malfunction of oil temperature sensor
L0 Outdoor Malfunction of inverter
L3 Outdoor Electronic component box overheat
L4 Outdoor Inverter cooling defect
L5 Outdoor Comp motor ground fault, Short circuit
L6 Outdoor Compressor motor grounding/short circuit
L7 Outdoor Total input overcurrent
L8 Outdoor Comp overload, Motor disconnected
L9 Outdoor Compressor lock
LA Outdoor Power unit malfunction
LC Outdoor Transmission between inverter & outdoor
P1 Outdoor Inverter over ripple
P3 Outdoor Thermistor abnormality
P4 Outdoor Power unit humidity sensor malfunction
PJ Outdoor Failure of capacity set resistor
U0 System Shortage of refrigerant or EEV failure
U1 System Negative phase, Open phase
U2 System Power supply insufficient
U3 System Wiring check operation not executed
U3 System Mismatch of indoor and outdoor units (Split only)
U4 System Transmission between indoor units
U5 System Transmission to remote controller
U6 System Malfunction transmission outdoor to BP unit
U7 System Transmission between outdoor units
U7 Outdoor Malfunction between outdoor boards(RMX/RX RK)
U8 System Transmission between master & slave R/C
U9 System Transmission error between indoor to outdoor
UA System Excessive number of fancoils
UC System Address duplication of central controllers
UE System Transmission error between indoor & central
UF System Refrigeration system not set/wiring - piping
UF System Terminals 1 and 3 crossed (Split/Skyair)
UH System System error, Refrigeration system set up
M1 System PCB defect
M8 System Transmission error between central controllers
MA System Improper combination of optional controllers
MC System Address duplication, Improper setting
64 VAM Indoor unit air thermistor error
65 VAM Outside air thermistor error
68 VAM
6A VAM Damper system alarm
6A VAM Damper system and thermistor error
6F VAM Malfunction of remote controller
6H VAM Malfunction of door switch or connector
94 VAM Internal transmission error

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