19
E6
Contactfailure, short circuit or,
miswiring(converse wiring) of
indoor/outdoorunit connecting
wire
Defectivetransmitting receiving
circuitof outdoor controller
circuit board
Defectivetransmitting receiving
circuitof indoor controller board
Noisehas entered into indoor/
outdoorunit connecting wire.
CheckLED display on the outdoor control
circuitboard. (ConnectA-control service
tool,PAC-SK52ST.)
Referto EA-EC item if LED displays EA-EC.
Checkdisconnection or looseness of indoor/
outdoorunit connecting wire of indoor unit or
outdoorunit.
Checkall the units in case of twin indoor
unitsystem.
-Turnthe power off, and on again to check.
Ifabnormality generates again, replace
indoorcontroller board or outdoor
controllercircuit board.
Otherindoor controller board may have
defectin case of twin indoor unit system.
E7
Indoor/outdoorunit communication
error(Transmitting error)
Abnormalif indoor controller board
receives“1” 30 times continuously when
indoorcontroller board transmits “0” signal.
Defectivetransmitting receiving
circuitof indoor controller board
Noisehas entered into power
supply.
Noisehas entered into outdoor
controlwire.
- Turnthe power off, and on again to check.
Ifabnormality generates again, replace
indoorcontroller board.
Indoor/outdoorunit communication
error(Signal receiving error)
Abnormalif indoor controller board
cannotreceive any signal normally for 6
minutesafter turning the power on.
Abnormalif indoor controller board
cannotreceive any signal normally for 3
minutes.
Considerthe unit as abnormal under
thefollowing condition: When 2 or more
indoorunits are connected to an
outdoorunit, indoor controller board
cannotreceive a signal for 3 minutes
fromoutdoor controller circuit board, a
signalwhich allows outdoor controller
circuitboard to transmit signals.
ErrorCode Abnormalpoint and detection method Cause Countermeasure
Fb
Indoorcontroller board
Abnormalif data cannot be read normally
fromthe nonvolatile memory of the indoor
controllerboard.
Defectiveindoor controller
board
Replaceindoor controller board.
E1
or
E2
Remotecontroller control board
Abnormalif data cannot be read nor-
mallyfrom the nonvolatile memory of the
remotecontroller control board.
(Errorcode: E1)
Abnormalif the clock function of remote
controllercannot be operated normally.
(Errorcode: E2)
Defectiveremote controller Replaceremote controller.
E3
or
E5
Remotecontroller transmission
error(E3)/signalreceiving error(E5)
Abnormalif remote controller could not
findblank of transmission path for 6 sec-
ondsand could not transmit.
(Errorcode: E3)
Remotecontroller receives transmitted
dataat the same time, compares the
data,and when detecting it, judges
differentdata to be abnormal 30
continuoustimes. (Error code: E3)
Abnormalif indoor controller board could
notfind blank of transmission path.
(Errorcode: E5)
Indoorcontroller board receives trans-
mitteddata at the same time, compares
thedata,and when detecting it, judges
differentdata to be abnormal 30
continuoustimes. (Error code: E5)
Seta remote controller to main, and the
otherto sub.
Remotecontroller is connected with only one
indoorunit.
Theaddress changes to a separate setting.
~Diagnoseremote controller.
a)When “RC OK” is displayed, remote con-
trollershave no problem.
Turnthe power off, and on again to check.
Whenbecoming abnormal again, replace
indoorcontroller board.
b) When“RC NG” is displayed, replace
remotecontroller.
c) When“RC E3” or “ERC 00-66” is dis-
played,noise may be causing abnormal-
ity.
2remote controllers are set as
“main.”
(In case of 2 remote con-
trollers)
Remotecontroller is connected
with2 indoor units or more.
Repetitionof refrigerant
address
Defectivetransmitting receiving
circuitof remote controller
Defectivetransmitting receiving
circuitof indoor controller board
Noisehas entered into trans-
missionwire of remote control-
ler.