Panasonic 2WAY Multi - P09 Indoor Unit Ceiling Panel Connector Connection Failure

IV–86
P09 Indoor Unit Ceiling Panel Connector Connection Failure
(Cannot be detected when the water heat exchanger unit is connected.)
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Error detection method
• Detects when indoor control board connector PNL (3P green) CN080 1 and 3 are open, and determines an
error.
• The wiring method and connectors differ among indoor units. For details, see the electric wiring diagrams
for each indoor unit.
• This input short-circuits on the following models when a ceiling panel or front panel connector is connected,
thus detecting a panel connection.
Basic circuit
(green)
Relay connector 8P or 9P
Indoor board
Short circuit
Short circuit
Relay connector 7P
Applicable models
S-22/28/36/45/56/73ML 8P (ceiling panel)
S-28/36/45/56/73MD 7P (ceiling panel)
S-22/28/36/45/56/73/106/140/160MU 7P (ceiling panel)
S-22/28/36/45/56MY
• The following models short-circuit this input upon shipping, to prevent this error.
Basic circuit
(green)
Indoor board
Relay connector 4P
Short circuit
Applicable models
FR7/9/12/16/18/25 (front panel)
TDR12/16/18/25/36/48 (ceiling panel)
Basic circuit
(green)
Indoor board
Short circuit
Applicable models All indoor units not listed above
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Troubleshooting
1
1-1
Is a ceiling panel connection relay connector 7P (red) or 8P
(red) or 9P (red) connected? Or, is a short-circuiting connector
4P (white) connected?
Yes 1-2
No Connect
1-2
Disconnect the indoor board connector PNL (green) CN080.
Conduction between No.1 and No.3 in socket?
Yes
Replace indoor control
board
No 1-3
1-3
Poor connection between connector PNL (green) CN080 and ceiling panel, or poor
connection/broken wire between connector PNL (green) CN080 and short-circuit connector
→ Repair
● See instructions packaged with servicing indoor board for procedure on replacing indoor control board.
GHPtroubleshooting.indbIV‒86GHPtroubleshooting.indbIV‒86 2012/11/2611:20:132012/11/2611:20:13