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Does float switch work?
Does drain pump work?
Is circuit wiring normal?
Is connection of TA sensor connector
(CN104 on indoor P.C. board) correct?
Are characteristics of
TA sensor resistance value normal?
Check indoor P.C. board (MCC-1570).
Defect → Replace
∗ Refer to Characteristics-1.
Is power of
drain pump turned on? ∗
Are connector pins 1 and 2
at drain pump unit side shorted
(Resistance value 0)?
Is connection of
float switch connector
(Indoor control board CN34)
normal?
Replace TA sensor.
Correct connection of connector.
Check the drain pipe, etc.
Replace drain pump.
Check wiring.
Replace drain pump
and indoor P.C. board
(MCC-1570).
Correct connection
of connector.
Check indoor P.C. board
(MCC-1570).
Defect → Replace
Check and correct wiring
and wire circuit.
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO NO
NO
NO
NO
NO
[P10 error]
∗ Check that voltage of 1-2 pin of CN504 on the indoor P.C. board is +12V. (1 pin is plus (+).)
[F10 error]