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.
|Heat exchanger||Indoor/outdoor||• Dust/dirt clogging, scratches||• Wash the heat exchanger when it is clogged.|
|Fan motor||Indoor/outdoor||• Sound||• Take appropriate measures when abnormal sound is generated.|
|Filter||Indoor||• Dust/dirt, breakage||• Wash the filter with water when it is contaminated.
• Replace it when it is damaged.
|Fan||Indoor||• 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 grilles||Indoor/outdoor||• Dust/dirt, scratches||• Fix or replace them when they are deformed or damaged.|
|Drain pan||Indoor||• 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.|
|Exterior||Outdoor||• Rust, peeling of insulator|
• Peeling/lift of coat
|• Apply repair coating.|
Error codes and parts to be checked
|Wired remote controller display|
|Main defective parts||Judging device||Parts to be checked|
|Air conditioner status|
|E01||No header remote controller||Remote|
|Incorrect remote controller setting --- The header remote controller has not been set (including two remote controllers).||*|
|E01||Remote controller communication error||Remote|
|No signal can be received from the indoor unit.||*|
|E02||Remote controller transmission error||Remote |
|System interconnecting wires, indoor P.C. board, remote controller.|
--- No signal can be sent to the indoor unit.
|E03||Indoor unit-remote controller regular communication error||Indoor||Remote controller, network adapter, indoor P.C. board --- No data is received from the remote controller or network adapter.||Auto-reset|
|E04||Indoor unit-outdoor unit serial communication error||Indoor||System interconnecting wires, indoor P.C. board, outdoor P.C. board -|
-- Serial communication error between indoor unit and outdoor unit
|E04||IPDU-CDB communication error||Indoor||System interconnecting wires, indoor P.C. board, outdoor P.C. board -|
- Serial communication error between indoor unit and outdoor unit
|E08||Duplicated indoor addresses *||Indoor||Indoor address setting error --- The same address as the self-address was detected.||Auto-reset|
|E09||Duplicated header remote controllers||Remote|
|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.)
|E10||CPU-CPU communication error||Indoor||Indoor P.C. board --- Communication error between main MCU and motor microcomputer MCU||Auto-reset|
|E18||Header indoor unit-indoor follower unit regular communication error||Indoor||Indoor 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|
|E31||IPDU communication error||Outdoor||Communication error between IPDU and CDB||Entire stop|
|F01||Indoor unit heat exchanger sensor (TCJ) error||Indoor||Heat 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) error||Indoor||Heat exchanger sensor (TC), indoor P.C. board --- Open-circuit short-circuit of the heat exchanger sensor (TC) was detected.||Auto-reset|
|F04||Outdoor unit discharge temp. sensor (TD) error||Outdoor||Outdoor temp. sensor (TD), outdoor P.C. board --- Open-circuit or short-circuit of the discharge temp. sensor was detected.||Entire stop|
|F06||Outdoor unit temp. sensor (TE/TS) error||Outdoor||Outdoor temp. sensors (TE/TS), outdoor P.C. board --- Open-circuit short-circuit of the heat exchanger temp. sensor was detected.||Entire stop|
|F07||TL sensor error||Outdoor||TL sensor may be displaced, disconnected or short-circuited.||Entire stop|
|F08||Outdoor unit outside air temp.|
|Outdoor||Outdoor temp. sensor (TO), outdoor P.C. board --- Open-circuit or short-circuit of the outdoor air temp. sensor was detected.||Operation
|F10||Indoor unit room temp. sensor (TA) error||Indoor||Room temp. sensor (TA), indoor P.C. board --- Open-circuit or short-||Auto-reset|
|F12||TS (1) sensor error||Outdoor||TS (1) sensor may be displaced, disconnected or short-circuited.||Entire stop|
|F13||Heat sink sensor error||Outdoor||Abnormal temperature was detected by the temp. sensor of the IGBT heat sink||Entire stop|
|F15||Temp. sensor connection error||Outdoor||Temp. sensor (TE/TS) may be connected incorrectly.||Entire stop|
|F29||Indoor unit, other P.C. board error||Indoor||Indoor P.C. board --- EEPROM error||Auto-reset|
|F31||Outdoor unit P.C. board||Outdoor||Outdoor P.C. board ---- In the case of EEPROM error.||Entire stop|
|H01||Outdoor unit compressor breakdown||Outdoor||Current detect circuit, power voltage --- Minimum frequency was reached in the current releasing control or short-circuit current (Idc) after direct excitation was detected||Entire stop|
|H02||Outdoor unit compressor lock||Outdoor||Compressor circuit --- Compressor lock was detected.||Entire stop|
|H03||Outdoor unit current detect circuit error||Outdoor||Current detect circuit, outdoor unit P.C. board --- Abnormal current was detected in AC-CT or a phase loss was detected.||Entire stop|
|H04||Case thermostat operation (1)||Outdoor||Malfunction of the case thermostat||Entire stop|
|H06||Outdoor unit low-pressure system error||Outdoor||Current, high-pressure switch circuit, outdoor P.C. board --- Ps pressure sensor error was detected or low-pressure protective operation was activated.||Entire stop|
|L03||Duplicated header indoor units||Indoor||Indoor address setting error --- There are two or more header units in the group.||Entire stop|
|L07||Group line in individual indoor unit *||Indoor||Indoor address setting error --- There is at least one group-connected indoor unit among individual indoor units.||Entire stop|
|L08||Indoor group address not set *||Indoor||Indoor address setting error --- Indoor address group has not been set.||Entire stop|
|L09||Indoor power level not set||Indoor||Indoor power level has not been set.||Entire stop|
|L10||Outdoor unit P.C. board||Outdoor||In the case of outdoor P.C. board jumper wire (for service) setting error||Entire stop|
|L20||LAN communication error||Network adapter central control||Address setting, central control remote controller, network adapter --- |
Duplication of address in central control communication
|L29||Other outdoor unit error||Outdoor||Other 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.
|L30||Abnormal external input into indoor unit (interlock)||Indoor||External devices, outdoor unit P.C. board incorrect external input into CN80||Entire stop|
|L31||Phase sequence error, etc.||Outdoor||Power supply phase sequence, outdoor unit P.C. board --- Abnormal phase sequence of the 3-phase power supply||Operation continued (thermostat OFF)|
|P01||Indoor unit fan error||Indoor||Indoor fan motor, indoor P.C. board --- Indoor thermal relay activated) was detected.||Entire stop|
|P03||Outdoor unit discharge temp. error||Outdoor||An error was detected in the discharge temp. releasing control.||Entire stop|
|P04||Outdoor unit high-pressure system error||Outdoor||High-pressure switch --- The IOL was activated or an error was detected in the high-pressure releasing control using the TE.||Entire stop|
|P05||Open phase detected||Outdoor||The power supply wire may be connected phase and voltages of the power supply.||Entire stop|
|P07||Heat sink overheat||Outdoor||Abnormal temperature was detected by the temp. sensor of the IGBT heat sink.||Entire stop|
|P10||Indoor unit water overflow detected||Indoor||Drain pipe, clogging of drainage, float switch circuit, indoor P.C. board --- Drainage is out of order or the float switch was activated.||Entire stop|
|P15||Gas leakage detected||Outdoor||There may be gas leakage from the pipe or connecting part. Check for gas leakage.||Entire stop|
|P19||4-way valve error||Outdoor|
|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
|P20||High-pressure protective operation||Outdoor||High-pressure protection||Entire stop|
|P22||Outdoor unit fan error||Outdoor||Outdoor unit fan motor, outdoor unit P.C. board --- An error (overcurrent, locking, etc.) was detected in the outdoor unit fan drive circuit.||Entire stop|
|P26||Outdoor unit inverter Idc activated||Outdoor||IGBT, outdoor unit P.C. board, inverter wiring, compressor --- Short-|
circuit protection for compressor drive circuit devices (G-Tr/IGBT) was activated.
|P29||Outdoor unit position error||Outdoor||Outdoor unit P.C. board, high-pressure switch --- Compressor motor position error was detected.||Entire stop|
|P31||Other indoor unit error||Indoor||Another indoor unit in the group is raising an alarm. |
E03/L07/L03/L08 alarm check locations and error description
* – : The air conditioner automatically enters the auto-address setting mode.