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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 known by the contents of the error code on the remote controller, indoor/outdoor unit green LED (power pilot
lamp and microcomputer normality pilot lamp) and 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
Red
Stays OFF
Stays OFF or Lights
continuously
Green
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Stays OFF
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
Keeps flashing
*3 time flash
Stays OFF
2 time flash
2 time flash
2 time flash
1 time flash
1 time flash
1 time flash
Stays OFF
Stays OFF
Red
Stays OFF Normal
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
2 time flash
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Remote
controller
error code
No-indication
E1
E5
E6
E7
E9
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 connected in reverse. *For wire breaking at
power ON, 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 connected in reverse.
LCD flashes
continuously
or is off.
Keeps flashing Keeps flashingStays OFF 2 time flash
Loose 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.
Keeps flashing Keeps flashingStays OFF Stays OFF
E10
The number of indoor units which is connected to a remote controller exceeds the
limitation (16 units at maximum).
Outdoor unit control PCB is faulty when the power is turned on, or the inverter
parts are faulty.
Heating overload (indoor heat exchanger temperature is anomaly high) and/or
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, FDTC type).
Communications are faulty between master and slave indoor units
Keeps flashing
Keeps flashing
3 time flash
Stays OFF
E14
1.6.3 Diagnosing of microcomputer circuit
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