top of page
For All Your Air Conditioning Needs
Would you like to be kept up to date? Fill in your details above.
Tel: 0113 2799520
E-mail: sales@csd-ltd.net
FAQ
-
ddTemperature 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
-
E02Sending error of local remote controller. Detected by remote controller. Likely causes: Faulty remote controller Cable / wiring problem
-
AAHigh side pressure sensor fault. Detected at outdoor. (Replace Pd pressure transducer)
-
08This points towards a reverse change in temperature, detected by indoor evaporator sensor (TC). Likely causes: 4 way valve. 4 way reversing valve energised for heating operation. Faulty TC sensor.
-
b4Low pressure transducer error or misreading fault. Detected at outdoor. Likely causes: Incorrect characteristics of suction pressure transducer (PS) Interface PCB faulty
-
d5Oil sensor fault. Detected at outdoor. Likely causes: TK2 sensor condition - sensor value 20°C=63k Ohms Outdoor PCB faulty
-
C06Command receiving error. Detected on Central Controller. Likely causes: Power loss at indoor unit group Network cable condition
-
18Condenser coil sensor (TE) fault. Detected indoors. Likely causes: TE/TE1 sensor condition / fault - sensor value 20°C=12.5k Ohms. Outdoor PCB fault.
-
E03Communication error between indoor unit and central remote controller. Detected indoors. Likely causes: Indoor network adapter fault Central remote controller fault
-
dCHigh 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
-
8FOutdoor unit address incorrect. Detected at outdoor. Likely causes: Multiple modularised condenser having SW 9 ON Interface PCB failure
-
b6External input activation, refrigerant leak detection system (Call Toshiba's technical helpline for further details 0870 843 0333)
-
dEIndoor unit automatic addressing failure. Detected at outdoor. Likely causes: Indoor PCB configuration error Indoor PCB faulty
-
AFPhase rotation incorrect. Detected at outdoor. Likely causes: Abnormal phase order Missing phase to outdoor unit
-
A6High compressor discharge temperature. Detected at outdoor by TD1. Likely causes: Low refrigerant Poor refrigerant flow Airflows TD2 sensor faulty - sensor value 20°C=63k Ohms
-
212 Pipe VRF & Split A/C equipment High Pressure switch activation 425psi-29bar. 3 Pipe VRF equipment, interrogate condenser PCB for additional fault code. Detected at outdoor. Likely causes: Split A/C equipment faulty H.P. switch, restriction in refrigerant flow, fan motor failure, poor airflows. VRF equipment, set condenser interface PCB switches as follows SW1 @ position 2 & SW2 @ position 0 (see sub codes Er21 or ErAd)
-
dFOutdoor unit automatic address failure. Detected at outdoor. Likely cause: Interface PCB faulty
-
A2Compressor suction sensor fault. Detected at outdoor. Likely causes: TS1/ThS sensor condition - sensor value 20°C=12.5k Ohms Interface PCB faulty
-
04On split A/C equipment it signifies an indoor to outdoor communication failure. On VRF equipment it could also be attributed to communication breakdown between condenser PCB's. Likely causes: - Indoor PCB. - Condenser PCB. - Interconnecting Wiring. - Fault with the transformer used to power condenser PCB.
-
b7Indoor group follower error. Detected at central controller (interrogate local controller by pressing check for additional fault codes)
-
d1Master condenser setup alarm. Detected at outdoor. Likely causes: Multiple inverter outdoor units connected Faulty interface PCB
-
bbHigh 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
-
d8Oil temperature alarm. Detected at outdoor. Likely causes: TK1 sensor location or condition - sensor value 20°C=63k Ohms Outdoor PCB faulty
-
0cReturn air sensor fault. Detected indoors. Likely causes: TA sensor condition - sensor value 20°C=12.5k Ohms. Indoor PCB faulty.
-
dbNo 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
-
8dOutdoor unit quantity fallen (loss of communication between condensers). Detected at outdoor. Likely causes: Power interruption BUS communication Cable / wiring problem between condening units
-
d9Oil temperature alarm. Detected at outdoor. Likely causes: TK2 sensor location or condition - sensor value 20°C=63k Ohms Outdoor PCB faulty
-
AbPressure transducer error. Detected at outdoor. Likely causes: Abnormal running pressures Abnormal PS / Pd characteristics Interface PCB faulty
-
d7Low oil detection. Detected at outdoor. Likely causes: TK1, TK2 & TK3 sensor condition - sensor value 20°C=63k Ohms Interface PCB faulty Refrigerant shortage
-
E04Communication 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
-
A0Compressor discharge sensor fault. Detected at outdoor. Likely causes: TD1/ThD1 sensor condition - sensor value 20°C=63k Ohms Interface PCB faulty
-
98Duplicated zone address. Likely causes: Incorrectly assigned central control addresses.
-
E01Communication 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
-
19Liquid or Compressor discharge sensor fault. Likely causes TL,TD sensor condition / faulty - TL sensor value 20°C=12.5k Ohms, TD sensor value 20°C=63k Ohms PCB faulty.
-
d4Oil sensor fault. Detected at outdoor. Likely causes: TK1 sensor condition - sensor value 20°C=63k Ohms Outdoor PCB faulty
-
1COutdoor error. Detected indoors (Interrogate condenser units for additional faults)
-
dAAbnormal 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
-
81Multi-Controller box Th(B) sensor fault. Likely causes: TH(B) sensor or M/C box PCB sensor value 20°C=12.5k Ohms
-
b9Pressure sensor fault. Detected indoors. Likely causes: Evaporator pressure sensor unplugged Pressure sensor open circuit
-
93Indoor coil sensor fault. Detected indoors. Likely causes: TC1 sensor condition - sensor value 20°C=12.5k Ohms. Indoor PCB faulty.
-
99No communication from indoor to remote controller. Detected by hard-wired remote controller. Likely causes: Faulty indoor PCB. Remote controller faulty. Cable damage.
-
bELow pressure trip. Detected outdoor by PS transducer. Likely causes: Suction pressure transducer condition (PS) Interface PCB fault Restriction in refrigerant flow Refrigerant shortage
-
d3IPDU 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
-
AEHigh compressor discharge temperature @ low inverter speed. Detected at outdoor. Likely causes: TD1 sensor condition - value 20°C=63k Ohms Insufficient refrigerant sensor
-
09Frost conditions detected / No temperature change. Detected indoors by evaporator sensor (TC). Likely causes: Poor airflow. Refrigerant Shortage. Overheating compressor.
-
b5External input activation, refrigerant leak detection system (Call Toshiba's technical helpline for further details 0870 843 0333)
-
88Multi-Control box does not recognise condenser capacity. Likely causes: Interconnecting cable damage. Outdoor PCB fault.
-
83Multi-Controller box Th(D) sensor fault. Likely causes: TH(D) sensor or M/C box PCB sensor value 20°C=12.5k Ohms
-
95Communication failure on P&Q network (indoor/outdoor communication). Detected indoors & outdoors. Likely causes: Network cable condition. PCB failure, indoor or outdoor.
-
14Inverter compressor PCB short circuit. Detected at outdoor. Likely causes: Blown fuses supplying inverter pack. Faulty IPDU (inverter board) or component within inverter pack. Electrical fault on inverter compressor.
-
97Central control communication error. Detected at central controller & indoors. Likely causes: Indoor power failure. Central controller address error. Cable damage.
-
84Multi-Controller box Th(X) sensor fault. Likely causes: TH(X) sensor or M/C box PCB sensor value 20°C=12.5k Ohms
-
15Multi-Controller box error. Detected indoors (Interrogate Multi-Controller box for additional faults by setting display switch @ position 1)
-
8EOutdoor units quantity too high. Detected at outdoor. Likely cause: Too many condensers connected
-
87Phase missing / Phase Rotation. Detected at outdoor. Likely causes: Abnormal power supply.
-
80Multi-Controller box Th(A) sensor fault. Likely causes: TH(A) sensor or M/C box PCB sensor value 20°C=12.5k Ohms
-
82Multi-Controller box Th(C) sensor fault. Likely causes: TH(C) sensor or M/C box PCB sensor value 20°C=12.5k Ohms
-
9ANo temperature change in evaporator. Detected by indoor evaporator sensor TC1. Likely causes: Miss-wiring Restriction in refrigerant flow Refrigerant shortage
-
0bIndoor float switch open circuit as result of high condensation levels within drip tray. Detected indoors. Likely causes: Faulty float switch. Faulty lift pump. Drain blocked.
-
12EEPROM Failure on PCB. Detected indoors (replace indoor PCB)
-
1EHigh compressor discharge temperature. Detected at outdoor. Likely causes: Low refrigerant charge Poor refrigerant flow, blockage Poor airflows TD sensor condition - sensor value 20°C=63k Ohms
-
11Indoor fan trouble. Detected indoors. Likely causes: Fan motor. Indoor PCB. On a cassette, packing foam has not been removed.
-
d2Fault within follower condenser. Detected at outdoor. (retrieve additional fault code information from follower condensers)
-
C05Command sending error. Detected on Central Controller. Likely causes: Power loss at indoor unit group Network cable condition
-
1FHigh Inverter AC current. Detected at outdoor. Likely causes: Imbalance in compressor voltage draw Excessive amps drawn by inverter compressor
-
E07Communication 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
-
1dHigh Inverter DC current. Detected at outdoor. Likely causes: Imbalance in compressor voltage Excessive amps drawn by inverter compressor
-
22Excessive high pressure. Detected at outdoor. Likely causes: Abnormal characteristics of Pd transducer. Refrigerant restriction/blockage
-
20Condenser PCB faulty (Replace main PCB)
-
9FInsufficient temperature change on evaporator. Detected indoors. Likely causes: Miss-wiring Restriction in refrigerant flow Refrigerant shortage TC1,TC2 & TA sensor condition - sensor value 20°C=12.5k Ohms
-
E06Decrease in quantity of indoor units. Detected indoors. Likely causes: Power loss at indoor unit Indoor PCB faulty A&B controller wiring problem
-
17Abnormal current detection on inverter compressor. Detected at outdoor. Possible causes: IPDU PCB (Inverter board) faulty. Compressor faulty.
-
A1Compressor discharge sensor fault. Detected at outdoor. Likely causes: TD2/ThD2 sensor condition - sensor value 20°C=63k Ohms Interface PCB faulty
-
A7High compressor suction temperature > 40°C. Detected at outdoor. Likely causes: Severe gas shortage TS sensor condition - sensor value 20°C=12.5k Ohms Interface PCB faulty
-
96Indoor unit count too high. Detected at outdoor. Likely causes: Indoor capacity vs. outdoor capacity Incorrect. Too many indoor units connected.
-
89Indoor capacity to high. Likely causes: Loss of combination within group of modularised condensers.
-
0dCoil sensor fault. Detected indoors. Likely causes: TC sensor condition - Sensor value 20°c=12.5k Ohms Indoor PCB fault
-
94Indoor coil sensor fault. Detected indoors. Likely causes: TC2 sensor condition - sensor value 20°C=12.5k Ohms. Indoor PCB faulty.
-
d6Oil sensor fault. Detected at outdoor. Likely causes: TK3 sensor condition - sensor value 20°C=63k Ohms Outdoor PCB faulty
bottom of page