Mitsubishi Electric CITY MULTI PUMY-SP140YKM User Manual

Check code
Abnormal points and detection methods Causes and checkpoints
Representsacommonerrordetection
Anabnormalitydetectedbythesendingsidecontrollerwhenreceiving
noACKfromthereceivingside,thoughsignalwasoncesent.The
sending side searches the error in 30 seconds interval for 6 times
continuously.
Thepreviousaddressunitdoesnotexistsince
theaddressswitchwaschangedwhileinelectric
continuity status.
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
unmatchedtransmissionlinetypes
·Typesforshieldline:CVVS,CPEVS,orMVVS
·Line diameter: 1.25 E or more
Decline of transmission voltage/signal due to
excessivenumberofconnectedunits
Malfunction due to accidental disturbance such as
noise or lightning surge
Defect of error source controller
Thecauseofdisplayedaddressandattributeisontheoutdoorunitside
AnabnormalitydetectedbytheindoorunitifreceivingnoACKwhen
transmitting signal from the indoor unit to the outdoor unit.
Contact failure of indoor/outdoor unit transmission
line
Disconnection of transmission connector (CN2M) on
indoor unit
Malfunction of sending/receiving circuit on indoor/
outdoor unit
Thecauseofdisplayedaddressandattributeisontheindoorunitside
An abnormality detected by the remote controller if receiving no ACK
whensendingdatafromtheremotecontrollertotheindoorunit.
Whileoperatingwithmultirefrigerantsystemindoor
units,anabnormalityisdetectedwhentheindoor
unit transmit signal to the remote controller during
the other refrigerant-system outdoor unit is turned
OFF,orwithin2minutesafteritturnedbackON.
Contact failure of indoor unit or remote controller
transmission line
Disconnection of transmission connector (CN2M) on
indoor unit
Malfunction of sending/receiving circuit on indoor
unit or remote controller
Thecauseofthedisplayedaddressandattributeisontheremote
controller side
AnabnormalitydetectedbytheindoorunitifreceivingnoACKwhen
transmitting signal from the indoor unit to the remote controller.
Whileoperatingwithmultirefrigerantsystemindoor
units,anabnormalityisdetectedwhentheindoor
unit transmit signal to the remote controller during
the other refrigerant-system outdoor unit is turned
OFF,orwithin2minutesafteritturnedbackON.
Contact failure of indoor unit or remote controller
transmission line
Disconnection of transmission connector (CN2M) on
indoor unit
Malfunction of sending/receiving circuit on indoor
unit or remote controller
6607
(A7)
No ACK error
Chart 1 of 4
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OCH668B

Mitsubishi Electric CITY MULTI PUMY-SP140YKM Specifications

General

Brand	Mitsubishi Electric
Model	CITY MULTI PUMY-SP140YKM
Category	Air Conditioner
Language	English