TOSHIBA FAULT CODES
Fault Finding When You Need It!
At Cool Solutions we believe that one of the companies strengths the the Technical Support that we offer. We have created this web page to give engineers a simple tool for helping with fault finding.
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External input activation, refrigerant leak detection system (Call Toshiba's technical helpline for further details 0870 843 0333)
External input activation, refrigerant leak detection system (Call Toshiba's technical helpline for further details 0870 843 0333)
Indoor group follower error.
Detected at central controller (interrogate local controller by pressing check for additional fault codes)
Pressure sensor fault.
Detected indoors.
Likely causes:
Evaporator pressure sensor unplugged
Pressure sensor open circuit
High compressor discharge temperature.
Detected at outdoor by TD2.
Likely causes:
Refrigerant shortage
Poor refrigerant flow
Poor airflows
TD2 sensor condition - sensor value 20°C=63k Ohms
Low pressure trip.
Detected outdoor by PS transducer.
Likely causes:
Suction pressure transducer condition (PS)
Interface PCB fault
Restriction in refrigerant flow
Refrigerant shortage
Command sending error.
Detected on Central Controller.
Likely causes:
Power loss at indoor unit group
Network cable condition
Command receiving error.
Detected on Central Controller.
Likely causes:
Power loss at indoor unit group
Network cable condition
Master condenser setup alarm.
Detected at outdoor.
Likely causes:
Multiple inverter outdoor units connected
Faulty interface PCB
Fault within follower condenser.
Detected at outdoor. (retrieve additional fault code information from follower condensers)
IPDU PCB overheat (Inverter board).
Detected at outdoor.
Likely causes:
Clogged heat-sink fins
Poorly secured PCB (Has heat sink paste been used)
Faulty IPDU PCB
Oil sensor fault.
Detected at outdoor.
Likely causes:
TK1 sensor condition - sensor value 20°C=63k Ohms
Outdoor PCB faulty
Oil sensor fault.
Detected at outdoor.
Likely causes:
TK2 sensor condition - sensor value 20°C=63k Ohms
Outdoor PCB faulty
Oil sensor fault.
Detected at outdoor.
Likely causes:
TK3 sensor condition - sensor value 20°C=63k Ohms
Outdoor PCB faulty
Low oil detection.
Detected at outdoor.
Likely causes:
TK1, TK2 & TK3 sensor condition - sensor value 20°C=63k Ohms
Interface PCB faulty
Refrigerant shortage
Oil temperature alarm.
Detected at outdoor.
Likely causes:
TK1 sensor location or condition - sensor value 20°C=63k Ohms
Outdoor PCB faulty
Oil temperature alarm.
Detected at outdoor.
Likely causes:
TK2 sensor location or condition - sensor value 20°C=63k Ohms
Outdoor PCB faulty
Abnormal overheat of heat-sink.
Detected at outdoor.
Likely causes:
Clogged heat-sink fins
Poorly secured PCB (Has heat sink paste been used)
Faulty IPDU board
No oil flow detected.
Detected at outdoor.
Likely causes:
TK1, TK2 & TK3 sensor location or condition - sensor value 20°C=63k Ohms
Interface PCB faulty
Blockage within SV3C
High temperature oil alarm.
Detected at outdoor.
Likely causes:
TK1 sensor condition - sensor value 20°C=63k Ohms
Interface PCB faulty
High ambient running conditions >43°c
Temperature change when condensers in off cycle.
Detected at outdoor.
Likely causes:
PMV passing within condenser
Discharge & suction pressure transducer error (PS & Pd characteristics)
Interface PCB faulty
Indoor unit automatic addressing failure.
Detected at outdoor.
Likely causes:
Indoor PCB configuration error
Indoor PCB faulty
Outdoor unit automatic address failure.
Detected at outdoor.
Likely cause:
Interface PCB faulty
Communication error between indoor unit and remote controller.
Detected by remote controller.
Likely causes:
Indoor PCB faulty
Remote controller faulty
Incorrect switch position on rear of remote controller, all switches normally down
Cable / wiring problem
Sending error of local remote controller.
Detected by remote controller.
Likely causes:
Faulty remote controller
Cable / wiring problem
Communication error between indoor unit and central remote controller.
Detected indoors.
Likely causes:
Indoor network adapter fault
Central remote controller fault
Communication failure between indoor and outdoor units.
Detected indoors.
Likely causes:
Split A/C
Indoor PCB fault
Outdoor PCB fault
Interconnecting cable condition
Compressor klixon open circuit.
VRF system
Power loss at condenser
U1/U2 network cable issue
Decrease in quantity of indoor units.
Detected indoors.
Likely causes:
Power loss at indoor unit
Indoor PCB faulty
A&B controller wiring problem
Communication failure between indoor and outdoor units.
Detected at outdoor.
Likely causes
Interconnecting cable problem
Outdoor PCB switch position SW30 bit 1 & 2 must be placed in ON position for test