Toshiba Error Codes

F01

Indoor TCJ sensor (coil out) error

Cause:

Open / short TCJ sensor

Action:

Replace TCJ thermistor.

F02

Indoor TC2 sensor (coil) error

Cause:

Open / short TC2 sensor

Action:

Replace TC2 thermistor.

F03

Indoor TC1 sensor (coil in) error

Cause:

Open / short TC1 sensor

Action:

Replace TC1 thermistor.

F04

Outdoor TD1 (discharge) sensor error

Cause:

Open / short Td sensor

Action:

Replace TD1 sensor.

F06

Outdoor TE / TS sensor error

Cause:

Open / short outdoor coil/suction sensor

Action:

Replace affected sensor.

F07

Outdoor TL (liquid) sensor error

Cause:

Open / short TL sensor

Action:

Replace TL sensor.

F08

Outdoor TO (ambient) sensor error

Cause:

Open / short OAT sensor

Action:

Replace TO sensor.

F10

Indoor TA (return air) sensor error

Cause:

Open / short TA sensor

Action:

Replace TA sensor.

F29

Indoor PCB other error

Cause:

Indoor PCB hardware fault

Action:

Replace indoor PCB.

H01

Compressor break-down (overcurrent)

Cause:

IPM overcurrent / locked rotor

Action:

Megger compressor, replace inverter.

H02

Compressor locked

Cause:

Mechanical seizure or wiring

Action:

Test compressor windings and replace if seized.

H03

Current detection circuit error

Cause:

CT or PCB fault

Action:

Replace outdoor PCB.

L03

Duplicated indoor header unit

Cause:

Two indoor headers set on group

Action:

Re-address indoor units.

L08

Indoor group/address not set

Cause:

Missing address after install

Action:

Run auto-address.

L29

Number of outdoor units error

Cause:

OD count mismatch

Action:

Check OD DIP and wiring.

P03

Discharge temperature TD1 too high

Cause:

Low charge, EEV closed

Action:

Check charge, EEV, Td sensor.

P04

High-pressure switch trip

Cause:

Blocked condenser, overcharge

Action:

Clean condenser, check fan and charge.

P05

Reverse phase / open phase (3-ph)

Cause:

Wrong phase rotation or missing phase

Action:

Swap any two phases or fix supply.

P07

Heat-sink (IGBT) overheat

Cause:

Inverter heatsink too hot

Action:

Clean heatsink, check fan and paste.

P22

Outdoor fan motor error

Cause:

Stalled / failed fan

Action:

Test fan and driver.

P26

Compressor inverter IPM short-circuit

Cause:

IPM fault

Action:

Replace inverter PCB.

P29

Compressor position detection error

Cause:

Inverter PCB or compressor wiring

Action:

Check leads, replace inverter if needed.