Error codes – κωδικοί βλαβών κλιματιστικά Nobu.
Indoor Units: NBO-09IDU , NBO-12IDU , NBO-18IDU , NBO-24IDU
Outdoor Units: NBO-09ΟDU , NBO-12ΟDU , NBO-18ΟDU , NBO-24ΟDU
Indoor unit error display
|O – light||X – off||⊗ – flash|
|Operation lamp||Timer lamp||Display||LED STATUS|
|1 time||X||E0||Indoor unit EEPROM parameter error|
|2 times||X||E1||Indoor / outdoor units communication error|
|4 times||X||E3||Indoor fan speed has been out of control|
|5 times||X||E4||Indoor room temperature sensor T1 open circuit or short circuit|
|6 times||X||E5||Evaporator coil temperature sensor T2 open circuit or short circuit|
|7 times||X||EC||Refrigerant leakage detection|
|1 time||O||F0||Overload current protection|
|2 times||O||F1||Outdoor ambient temperature sensor T4 open circuit or short circuit|
|3 times||O||F2||Condenser coil temperature sensor T3 open circuit or short circuit|
|4 times||O||F3||Compressor discharge temperature sensor T5 open circuit or short circuit|
|5 times||O||F4||Outdoor unit EEPROM parameter error|
|6 times||O||F5||Outdoor fan speed has been out of control|
|1 time||⊗||P0||IPM malfunction or IGBT over-strong current protection|
|2 times||⊗||P1||Over voltage or over low voltage protection|
|3 times||⊗||P2||High temperature protection of IPM module or compressor|
|4 times||⊗||P3*||Outdoor ambient temperature too low|
|5 times||⊗||P4||Inverter compressor drive error|
1. In heating mode, when the outdoor temperature is lower than -13°F (-25℃) for 1 hour, the indoor unit display error code P3.
2. If the outdoor temperature is higher than -7.6°F (-22℃) for 10 minutes and compressor stop for 1 hour or outdoor temperature is higher than 23°F (-5℃) for 10 minutes, then the unit will return to work.
Explanation of error codes
E0 (indoor) / F4 (outdoor) Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip.
E1 – Indoor unit does not receive the feedback from outdoor unit during 110 seconds and this condition happens four times continuously.
E3/F5 – When indoor fan speed is too low (300RPM) for certain time, the unit will stop and the LED will display the failure.
E4/E5/F1/F2/F3 – If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure.
EC – Define the initial evaporator coil temperature T2 when the compressor just starts running as Tcool. In the first 5 minutes after the compressor starts up in cooling mode, if T2<Tcool-2℃ (Tcool – 35.6℃) does not keep continuous 4 seconds and this situation happens 3 times, the display area will show “EC” and the unit will turn off . T2 sensor faulty – Indoor PCB faulty – System problems, such as leakage or blocking.
F0 – An abnormal current rise is detected by checking the specified current detection circuit.
P0 – When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED will show “P0” and AC will turn off .
P1 – An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit.
P2 – If the sampling voltage is not 5V, the LED will display the failure.
P4 – An abnormal inverter compressor drive is detected by a special detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on. Error codes – κωδικοί βλαβών κλιματιστικά Nobu.