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(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
Outdoor unit LEDIndoor unit LED
Green
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Red
Stays OFF
Stays OFF
Stay OFF or Lights
continously
Green
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Stays OFF
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
*3 time flash
Stays OFF
Stay OFF
2 time flash
2 time flash
2 time flash
1 time flash
1 time flash
1 time flash
Stays OFF
Stays OFF
Stay OFF
Red
Stays OFF
Normal
Indoor unit microcomputer failure
Indoor unit PCB fault
Outdoor unit microcomputer failure
Indoor unit heat exchanger thermistor failure
Indoor unit return air thermistor failure
The float SW operates (with FS only). Drain up kit wiring fault.
Indoor / outdoor transmission error.
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
2 time flash
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Remote
controller
error code
No-indication
LCD flashes
continuously
or is off.
E1
E5
E6
E7
E9
E10
E28
Cause
Keeps flashing Keeps flashing1 time flash Stays OFF
E8
Stays OFF Stays OFF Stays OFF
Power OFF, L phase wiring is open, power source failure
Stays OFF
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.
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.)
Keeps flashing Keeps flashingStays OFF 2 time flash
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.
When multi-unit control by remote controller is performed, the number of units is
over (more than 17 units). Two remote controller are provided for one controller is
performed.
Outdoor unit control PCB is faulty when the power is turned on, or the inverter
parts are faulty (FDCVA 151~251 type).
Heating overload (indoor heat exchanger temperature is abnormally high) and
indoor heat exchanger thermistor is faulty.
Remote controller thermistor failure
Keeps flashing
Keeps flashing
Stays OFF
Stays OFF
E16
Fan motor is faulty (FDTA 501, 601 type, FDKN type).
1.3 Diagnosing of microcomputer circuit
Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.