(1)Selfdiagnosis function
(a)Check Indicator Table
Whether a failure exists or not on the indoor unit and outdoor unit can be know by the contents of remote controller eroor code, indoor/outdoor unit green LED (power pilot lamp and microcomputer normality pilot lamp) or red LED (check pilot lamp).
1) Indoor unit side
1.3
- 4 -
Remote controller error code
No-indication
LCD flashes continuously or is off.
E1
E5
E6
E7
E8
E9
E10
E16
E28
Indoor unit LED | Outdoor unit LED | |||
Green | Red | Green | Red | |
Keeps flashing | Stays OFF | Keeps flashing | Stays OFF | |
Stays OFF | Stays OFF | Stays OFF | Stays OFF | |
Keeps flashing | Stays OFF | Keeps flashing | Stays OFF | |
Keeps flashing | *3 time flash | Keeps flashing | Stays OFF | |
Keeps flashing | Stays OFF | Keeps flashing | 2 time flash | |
Keeps flashing | Stays OFF | Keeps flashing | Stays OFF | |
Stay OFF or Lights | Stay OFF | Keeps flashing | Stays OFF | |
continously | ||||
|
|
| ||
Keeps flashing | Stay OFF | Keeps flashing | Stays OFF | |
Keeps flashing | 2 time flash | Keeps flashing | 2 time flash | |
Keeps flashing | 2 time flash | Stays OFF | Stays OFF | |
Keeps flashing | 2 time flash | Keeps flashing | Stays OFF | |
Keeps flashing | 1 time flash | Keeps flashing | Stays OFF | |
Keeps flashing | 1 time flash | Keeps flashing | Stays OFF | |
Keeps flashing | 1 time flash | Keeps flashing | Stays OFF | |
Keeps flashing | 1 time flash | Keeps flashing | Stays OFF | |
Keeps flashing | Stays OFF | Keeps flashing | Stays OFF | |
Keeps flashing | Stays OFF | Keeps flashing | Stays OFF | |
Keeps flashing | Stays OFF | Keeps flashing | Stays OFF | |
Cause
Normal
Power OFF, L phase wiring is open, power source failure
Indoor unit microcomputer failure
Remote controller wires X and Y are reversely connected. *For wire breaking at power ON, the LED is OFF. Remote controller wire is open. (X wire breaking : A beep is produced and no indication is made. Z wire breaking : No beep and no indication) The remote controller wires Y and Z are reversely connected.
Poor connection or disconnection in wires connecting the indoor and outdoor units.
When multiple remote controllers are used for control, the power supply to some indoor units is OFF.
Indoor unit PCB fault
The remote controller wire Y is open. The remote controller wires X and Y are reversely connected. Noise is penetrating the remote control lines. The remote controller or indoor control PCB is faulty. (The communications circuit is faulty.)
Indoor / outdoor transmission error.
Outdoor unit control PCB is faulty when the power is turned on, or the inverter parts are faulty (FDCVA 151~251 type).
Outdoor unit microcomputer failure
Indoor unit heat exchanger thermistor failure
Indoor unit return air thermistor failure
Heating overload (indoor heat exchanger temperature is abnormally high) and indoor heat exchanger thermistor is faulty.
The float SW operates (with FS only). Drain up kit wiring fault.
When
Fan motor is faulty (FDTA 501, 601 type, FDKN type).
Remote controller thermistor failure
Diagnosing of microcomputer circuit
Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.
