Thursday, July 7, 2011

Fault Codes - Toshiba Ras Series


Do Not turn off the power supply before reading the fault codes, doing so will clear the diagnostic memory. Caution
must be taken when removing the access covers as high voltages are present.
Fault diagnosis is available by pressing the check button on the rear of the remote controller.
Note: Fault diagnosis for these systems is only possible when using infrared remote controller type WC-C2YE
or WH-C2YE (which may be ordered under part number 43069666)

Code = 00
Indoor P.C. Board Fault
Code = 0C
Fault = TA Sensor open circuit
System Status = No cooling operation (Heating operation continuously – heat pumps)
Check = Sensor Resistance 20°C = 12.5kW, 25°C = 10kW

Code = 00
Indoor P.C. Board Fault
Code = 0C
Fault = TA Sensor Short circuit
System Status = No heating operation – heat pumps (Cooling operation continuously)
Check = Sensor Resistance 20°C = 12.5kW, 25°C = 10kW

Code = 00
Indoor P.C. Board Fault
Code = 0d
Fault = TC sensor open circuit
System Status = No cooling operation (Heating operation continuously – heat pumps)
Check = Sensor Resistance 20°C = 12.5kW, 25°C = 10kW

Code = 00
Indoor P.C. Board Fault
Code = 0d
Fault = TC Sensor short circuit
System Status = No heating operation – heat pumps (Cooling operation continuously)
Check = Sensor Resistance 20°C = 12.5kW, 25°C = 10kW

Code = 00
Indoor P.C. Board Fault
Code = 11
Fault = Fan Motor
System Status = System Stop
Check = Seized motor Thermal fuse open circuit

Code = 00
Indoor P.C. Board Fault
Code = 12
Fault = PCB Fault
System Status = System Stop
Check = Replace PCB

Code = 00
Indoor P.C. Board Fault
Code = 21
Fault = IOL Operation
System Status = System Stop
Check =

Code = 00
Indoor P.C. Board Fault
Code = 13
Fault = TC Temp
System Status = Operation Continues
Check = Check TC Sensor

Code = 01
Inter. Cable
Code = 04
Fault = Inter. Cable
System Status = System Stop
Check = Cable / CT termination and thermal fuse

Code = 01
Inter. Cable
Code = 05
Fault = Inter Cable
System Status = Operation Continues
Check = No Communication to the outdoor unit

Code = 02
Outdoor PCB
Code = 18
Fault = TE Sensor Open/Closed Circuit
System Status = System Stop
Check = Check outdoor TE sensor

Code = 02
Outdoor PCB
Code = 19
Fault = TD Sensor Open / Closed circuit
System Status = System Stop
Check = Check outdoor TD sensor

Code = 03
Other Parts
Code = 07
Fault = Instantaneous power failure Compressor thermo
System Status = Operation Continues
Check = Check Compressor thermo. Check Ref. charge Indoor PCB

Code = 03
Other Parts
Code = 1E
Fault = TD > 120°C
System Status = System Stop
Check = Check TD Sensor Check Ref. Charge

Code = 03
Other Parts
Code = 09
Fault = No change in temp. Of indoor unit
System Status = Indoor unit operates
Check = Compressor running not pumping / klixon tripped. For cross wiring

Code = 03

Code =
Fault = Frost Condition
System Status = Indoor fan low speed, no outdoor unit operation
Check = Gas charge / pipe blockage. Indoor air flow TC Sensor Cross wiring

Code = 03
Other Parts
Code = 1d
Fault = Compressor
System Status = System Stop
Check = Compressor windings. Current consumption.

The LEDs on the indoor unit will also flash depending on the type of fault :

Operation display flashing at 1Hz Restoration of power after a power cut (N/A)
Operation display flashing at 5Hz TA Sensor fault (0C)
Operation display flashing at 5Hz TC Sensor fault (0d)
Operation display flashing at 5Hz Fan motor fault (11)
Operation display flashing at 5Hz PCB fault (12)
Operation and timer display flashing at 5Hz Interconnecting cable (04)
Operation, timer and pre-heat display flashing at 5Hz No temp change or frost condition (09)
Operation, timer and pre-heat display flashing at 5Hz Compressor (1d)
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