Panasonic CS-VZ9SKE Service Manual

Also see for CS-VZ12SKE: Operating instructions Operating instructions

Contents

Panasonic CS-VZ9SKE Service Manual Manual pdf 106 page image

10617.4 Self-diagnosis Method17.4.1 H11 (Indoor/Outdoor Communication Error)TroubleshootingNo abnormality is observedThe voltage is not presentThere is continuityThe voltage is not present.( The following method can be used for the models from 2003 onwards.)No abnormality is observedReactor is not open-circuitThe coil is not short-circuitedThe coil is short-circuitedOpen-circuitedDisconnection/Imperfectconnection of the connectorOutdoor unit fan motor & compressor do not workDisconnected wire or insulation resistance errorNo disconnected wire orinsulation resistance errorThere is no continuityDisconnection/Imperfectconnection of the wireDiagnosis Procedures and Cause Measures to be TakenThe voltage is presentIs there no loosened connection of the wire connected to the terminal?(H11 may be displayed due to imperfect wire connection.)When the air conditioner is operated after the power is OFF and then ON, is thefollowing voltage present between the white and black terminals on the outdoor unit?Check if DC40 – 55V is present between the white and red terminals whenthe red wire (communication wire) is disconnected from the outdoor unitterminal.Check for bad connection of the connector of the outdoor unit reactor.1 Remove the red wire (communication wire) from the outdoor unit terminal.2 Connect a resistor (10 – 15kΩ) between the white and red terminals.3 Short-circuit between CN –S terminals on the outdoor unit control boardusing a clip, etc.4 Supply AC current to the outdoor unit (operate the air conditioner).Check the operations of the outdoor fan motor and compressor when ACcurrent is supplied.Check for disconnection of the wire, or check the insulationresistance between red-white, red-black and white-black.Is there continuity between the indoor unit terminal (white) andTAB2 connected to the indoor unit control board?Fix the problem.Replace the indoor unit terminal.Replace the indoor unit controlboard.Replace the wire for connection.Check the connected wire and ifthere is no problem, replace theindoor unit control board.Fix the problem.Replace the reactor.Replace the outdoor unit controlboard and expansion valve coil atthe same time.Replace the outdoor unit controlboard.Is the reactor of the outdoor unit open-circuited?Is the expansion valve coil of the outdoor unit short-circuited?The voltage is presentOutdoor unit fan motor &compressor work