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Correct connection of connector.
Check drain pipe, etc.
Check and correct cabling/wiring.
Correct connection of connector.
Replace TA sensor.
Check indoor P.C. board
(MCC-1402).
Defect
Replace
Check indoor P.C. board
(MCC-1402 or).
Defect
Replace
Check indoor P.C. board
(MCC-1402).
Defect
Replace
Replace drain pump.
Check cabling.
* Refer to Characteristics-1.
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Does float switch operate?
Does drain pump operate?
Is circuit cabling normal?
Is power of drain pump turned on?
Is connection of float switch connector
(Indoor control P.C. board CH34) normal?
NO
YES
Is connection of TA sensor connector
(indoor P.C. board CN104) normal?
NO
YES
Are characteristics of TA sensor
resistance value normal?
[P10 error]/[Ob error]
[F10 error] [0C error]