Mitsubishi EHST20C-VM2C - Page 68

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Error code Title and display conditions Possible Cause Diagnosis and action
J0 Indoor unit/wireless receiver communication
failure
ErrorcodeJ0isdisplayedwhentheFTCcannot
receivedatafromthewirelessreceiverfor1
minute.
1. Connectionfaultwithwirelessreceiver-
FTC connection
1. Checkthe connectionstothewirelessre-
ceiver and FTC have not become loose and
thattheconnectingcableisnotdamaged.
2. FaultwithFTCreceivingcircuitboard
2. to 4.
TurnthepowertotheindoorunitOFFand
then ON.
Powertoboththeindoorunitandoutdoor
unitsshouldbeswitchedOFFthenON.
(Thismayrequireswitching1or2breakers
dependingiftheunitispoweredindepen-
dently from the outdoor unit).
If the J0 code is still displayed the FTC and/
orthewirelessreceivercircuitboardshould
be replaced.
3. Faultwithwirelessreceiver'stransmis-
sion circuit board
4. Electrical noise causes interference
withwirelessreceiver communication
cable.
J1 to J8
Wireless remote controller/wireless receiver
communication failure
(Reception error)
Errorcodedisplayedifwirelessreceiverreceives
no/incompletedatafromthewirelessremote
controller for 15 consecutive minutes.
ThedigitaftertheJreferstotheaddressofthe
wirelessremotecontrollerthathastheerror.
E.g.Errorcode"J3"referstoacommunication
faultbetweenthewirelessreceiverandwireless
remotecontrolwithaddress3.
1. Batteryonwirelessremotecontrolmay
beat
1 Check and replace the battery if necessary
thewirelessremotecontrollerbattery.
2. Thewirelessremotecontrollerisoutof
rangeofthewirelessreceiver.
2. to 4.
Repositionthewirelessremotecontrol
closer to the receiver and perform a
communication test.
Forprocedurerefertowirelessremote
controller installation manual.
If"OK"isdisplayedthenthecauseofthe
J1toJ8errorwasthecontrollerwasoutof
rangeofthereceiver.
Thewirelessremotecontrollershouldbe
installedwithinrangeofthereceiver.
If"Err"isdisplayedreplacewirelessremote
controllerwithanewcontrollerandperform
thepairingprocedure.
Ifafterthisprocedurethe"Err"codeisstill
displayedthefaultiswiththereceiverunit
(attached to the indoor unit).
Thereceiverunitshouldbereplacedwitha
newpartandtheoriginalremotecontrolcan
be reconnected.
If"OK"isdisplayedthenthefaultiswiththe
remote control and this should be replaced.
3. Faultwithwirelessremotecontroller
transmission circuit board
4. Faultwithwirelessreceiver'sreception
circuit board
U*, F*, A* Outdoor unit failure Outdoor unit failure Refer to outdoor unit service manual.
Note:Tocancelerrorcodespleaseswitchsystemoff(pressbuttonF4(RESET)onmainremotecontroller).
OCH570C