6608
(A8)
Abnormal points and detection methods Causes and checkpoints
AbnormalifreceivingnoresponsecommandwhilealreadyreceivedACK.
The sending side searches the error in 30 seconds interval for 6 times
continuously.
Continuous failure of transmission due to noise, etc
Decline of transmission voltage/signal caused by
tolerance over on transmission line
·At the furthest end: 200 m
·On remote controller line: (12 m)
Decline of transmission voltage/signal due to
unmatchedtransmissionlinetypes
·Typesforshieldline:CVVS,CPEVS,orMVVS
·Line diameter: 1.25 E or more
Accidental malfunction of error source controller
●Diagnosisofdefectives
MakesuretoturnthepowerOFFbeforeconnecting/disconnectinganyconnectors,orreplacingboards.
Diagnosis Remedy
Noresponseframeerror
Yes
Yes
Yes
Yes
No
No
No
No
Doesitoperatenormally?
The transmission line is connected
properly.
Itisnotexceedingthetolerance.
Is correct kind of transmission line
used?
Replacethecontrollerboard
(Defectofthecontrollerwhichthe
displayedaddress/attributebelongto).
Connectthetransmissionlineproperly.
Correctitwithinthetolerance.
Replaceitwiththecorrectkindof
transmission line.
There is no abnormality on the AC unit.
Check the transmission line for
transmissionwaveandnoise.
TurnthepowerOFFofindoor/outdoorunit,Fresh
Master, Lossnay and remote controller simultaneously
for2minutesormore,thenturnthepowerbackON.
Check the transmission line for a
disconnection and looseness
(on the terminal board and connector).
Checkthetransmissionlinewhetherit
exceedsthetoleranceornot.
Checkwhetherthecorrectkindof
transmission line is used or not.
90
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