Toshiba split type air conditioner error code

You’ve lost the user’s manual where every Toshiba air error code is explained? No need to worry, as we have all the fault codes explained in the list below.

  • The list contains the following information for every fault code:
  • the parts of the air conditioner that are probably not working;
  • judging device;
  • a brief error description, as well as the parts that should be checked.

In addition to this, every Toshiba air error code is provided with the information on the conditioner status. This column explains whether the conditioning system is working or whether it has experienced an entire stop or auto-reset.

Maintenance List

PartUnitCheck (visual/auditory)Maintenance
Heat exchangerIndoor/outdoor• Dust/dirt clogging, scratches• Wash the heat exchanger when it is clogged.
Fan motorIndoor/outdoor• Sound• Take appropriate measures when abnormal sound is generated.
FilterIndoor• Dust/dirt, breakage• Wash the filter with water when it is contaminated.

• Replace it when it is damaged.
FanIndoor• Vibration, balance

• Dust/dirt, appearance
• Replace the fan when vibration or balance is terrible.

• Brush or wash the fan when it is contaminated.
Air inlet/outlet grillesIndoor/outdoor• Dust/dirt, scratches• Fix or replace them when they are deformed or damaged.
Drain panIndoor• Dust/dirt clogging, drain contamination• Clean the drain pan and check the downward slope for smooth drainage.
Ornamental panel, louvres Indoor• Dust/dirt, scratches• Wash them when they are contaminated or apply repair coating.
ExteriorOutdoor• Rust, peeling of insulator

• Peeling/lift of coat
• Apply repair coating.

Error codes and parts to be checked

Wired remote controller display
Indication
Main defective partsJudging deviceParts to be checked
error description
Air conditioner status
E01No header remote controllerRemote

controller
Incorrect remote controller setting --- The header remote controller has not been set (including two remote controllers).*
E01Remote controller communication errorRemote

controller
No signal can be received from the indoor unit.*
E02Remote controller transmission errorRemote

controller
System interconnecting wires, indoor P.C. board, remote controller.
--- No signal can be sent to the indoor unit.
*
E03Indoor unit-remote controller regular communication errorIndoorRemote controller, network adapter, indoor P.C. board --- No data is received from the remote controller or network adapter. Auto-reset
E04Indoor unit-outdoor unit serial communication errorIndoorSystem interconnecting wires, indoor P.C. board, outdoor P.C. board -
-- Serial communication error between indoor unit and outdoor unit
Auto-reset
E04IPDU-CDB communication errorIndoorSystem interconnecting wires, indoor P.C. board, outdoor P.C. board -
- Serial communication error between indoor unit and outdoor unit
Auto-reset
E08Duplicated indoor addresses *IndoorIndoor address setting error --- The same address as the self-address was detected. Auto-reset
E09Duplicated header remote controllersRemote

controller
Remote controller address setting error --- Two remote controllers are set as header in the double-remote controller control.
(* The header indoor unit stops raising alarm and follower indoor units continue to operate.)
*
E10CPU-CPU communication errorIndoorIndoor P.C. board --- Communication error between main MCU and motor microcomputer MCUAuto-reset
E18Header indoor unit-indoor follower unit regular communication errorIndoorIndoor P.C. board --- Regular communication is not possible between header and follower indoor units or between twin header (main) and follower (sub) units.Auto-reset
E31IPDU communication errorOutdoorCommunication error between IPDU and CDBEntire stop
F01Indoor unit heat exchanger sensor (TCJ) errorIndoorHeat exchanger sensor (TCJ), indoor P.C. board --- Open-circuit or short-circuit of the heat exchanger sensor (TCJ) was detected. Auto-reset
F02 Indoor unit heat exchanger sensor (TC) errorIndoorHeat exchanger sensor (TC), indoor P.C. board --- Open-circuit short-circuit of the heat exchanger sensor (TC) was detected. Auto-reset
F04Outdoor unit discharge temp. sensor (TD) errorOutdoorOutdoor temp. sensor (TD), outdoor P.C. board --- Open-circuit or short-circuit of the discharge temp. sensor was detected.Entire stop
F06Outdoor unit temp. sensor (TE/TS) errorOutdoorOutdoor temp. sensors (TE/TS), outdoor P.C. board --- Open-circuit short-circuit of the heat exchanger temp. sensor was detected. Entire stop
F07TL sensor errorOutdoorTL sensor may be displaced, disconnected or short-circuited.Entire stop
F08Outdoor unit outside air temp.
sensor error
OutdoorOutdoor temp. sensor (TO), outdoor P.C. board --- Open-circuit or short-circuit of the outdoor air temp. sensor was detected.Operation

continued
F10Indoor unit room temp. sensor (TA) errorIndoorRoom temp. sensor (TA), indoor P.C. board --- Open-circuit or short-Auto-reset
F12TS (1) sensor errorOutdoorTS (1) sensor may be displaced, disconnected or short-circuited.Entire stop
F13Heat sink sensor errorOutdoorAbnormal temperature was detected by the temp. sensor of the IGBT heat sinkEntire stop
F15Temp. sensor connection errorOutdoorTemp. sensor (TE/TS) may be connected incorrectly.Entire stop
F29Indoor unit, other P.C. board errorIndoorIndoor P.C. board --- EEPROM errorAuto-reset
F31Outdoor unit P.C. boardOutdoorOutdoor P.C. board ---- In the case of EEPROM error.Entire stop
H01Outdoor unit compressor breakdown OutdoorCurrent detect circuit, power voltage --- Minimum frequency was reached in the current releasing control or short-circuit current (Idc) after direct excitation was detectedEntire stop
H02Outdoor unit compressor lockOutdoorCompressor circuit --- Compressor lock was detected.Entire stop
H03Outdoor unit current detect circuit errorOutdoorCurrent detect circuit, outdoor unit P.C. board --- Abnormal current was detected in AC-CT or a phase loss was detected. Entire stop
H04Case thermostat operation (1)OutdoorMalfunction of the case thermostatEntire stop
H06Outdoor unit low-pressure system errorOutdoorCurrent, high-pressure switch circuit, outdoor P.C. board --- Ps pressure sensor error was detected or low-pressure protective operation was activated.Entire stop
L03Duplicated header indoor unitsIndoorIndoor address setting error --- There are two or more header units in the group. Entire stop
L07Group line in individual indoor unit *IndoorIndoor address setting error --- There is at least one group-connected indoor unit among individual indoor units. Entire stop
L08Indoor group address not set *IndoorIndoor address setting error --- Indoor address group has not been set.Entire stop
L09Indoor power level not setIndoorIndoor power level has not been set.Entire stop
L10Outdoor unit P.C. boardOutdoorIn the case of outdoor P.C. board jumper wire (for service) setting errorEntire stop
L20LAN communication errorNetwork adapter central controlAddress setting, central control remote controller, network adapter ---
Duplication of address in central control communication
Auto-reset
L29Other outdoor unit errorOutdoorOther outdoor unit error
1) Communication error between IPDU MCU and CDB MCU
2) Abnormal temperature was detected by the heat sink temp. sensor in IGBT.
Entire stop
L30Abnormal external input into indoor unit (interlock)IndoorExternal devices, outdoor unit P.C. board incorrect external input into CN80Entire stop
L31Phase sequence error, etc.OutdoorPower supply phase sequence, outdoor unit P.C. board --- Abnormal phase sequence of the 3-phase power supplyOperation continued (thermostat OFF)
P01Indoor unit fan errorIndoorIndoor fan motor, indoor P.C. board --- Indoor thermal relay activated) was detected. Entire stop
P03Outdoor unit discharge temp. errorOutdoorAn error was detected in the discharge temp. releasing control.Entire stop
P04Outdoor unit high-pressure system errorOutdoorHigh-pressure switch --- The IOL was activated or an error was detected in the high-pressure releasing control using the TE. Entire stop
P05Open phase detectedOutdoorThe power supply wire may be connected phase and voltages of the power supply. Entire stop
P07Heat sink overheatOutdoorAbnormal temperature was detected by the temp. sensor of the IGBT heat sink.Entire stop
P10Indoor unit water overflow detectedIndoorDrain pipe, clogging of drainage, float switch circuit, indoor P.C. board --- Drainage is out of order or the float switch was activated. Entire stop
P15Gas leakage detectedOutdoorThere may be gas leakage from the pipe or connecting part. Check for gas leakage.Entire stop
P194-way valve errorOutdoor

(Indoor)
4-way valve, indoor temp. sensors (TC/TCJ) --- An error was detected due to temperature drop of the indoor unit heat exchanger sensor when heating.Auto-reset

(Auto-reset)
P20High-pressure protective operationOutdoorHigh-pressure protectionEntire stop
P22Outdoor unit fan errorOutdoorOutdoor unit fan motor, outdoor unit P.C. board --- An error (overcurrent, locking, etc.) was detected in the outdoor unit fan drive circuit.Entire stop
P26Outdoor unit inverter Idc activatedOutdoorIGBT, outdoor unit P.C. board, inverter wiring, compressor --- Short-
circuit protection for compressor drive circuit devices (G-Tr/IGBT) was activated.
Entire stop
P29Outdoor unit position errorOutdoorOutdoor unit P.C. board, high-pressure switch --- Compressor motor position error was detected.Entire stop
P31Other indoor unit errorIndoorAnother indoor unit in the group is raising an alarm.
E03/L07/L03/L08 alarm check locations and error description
Auto-reset

* – : The air conditioner automatically enters the auto-address setting mode.