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Checking code Meaning, detecting method Cause Checking method & Countermeasure
5301
Different
indoor model
connected
abnormality
An exclusive R22 refrigerant indoor
unit was connected to a R407C
refrigerant outdoor unit.
1) An error was made in the MAIN
board of the outdoor unit (replaced
with the wrong circuit board).
2) An error was made in selecting the
indoor unit (installation error).
3) An error was made in the indoor
unit’s circuit board (replaced with
the wrong circuit board).
If the model name plate on the outdoor
unit says that it is an exclusive R22
model, and if error “7130” has occurred,
the MAIN board for the outdoor unit is
a R407C model circuit board, so re-
place it with the MAIN board for the R22
model.
If the model name plate for the indoor
unit is an exclusive R22 model, install
a unit which can also operate with
R407C.
If the model name plate on the indoro
unit indicates that it is also capable of
operating with R407C, and error “7130”
occurs, the indoor unit’s circuit board
is for an exclusive R22 model, so re-
place it with the circuit board for a unit
which is also capable of using R407C.
If none of the items in 1) to 5) is appli-
cable, and if the trouble reappears
even after the power is switched on
again, replace the circuit board by fol-
lowing procedure (when replacing the
circuit board, be sure to connect all
the connectors, ground wires, etc.
securety)
1 If the problem is solved after the
G/A board only is replaced, then the
G/A board is defective.
2 If the problem is not solved, rein-
stall the INV board and replace the
INV board. If the problem is solved,
the INV board is defective.
3 If the problem is not solved by 1
and 2 above, replace both boards.
6) The circuit board is defective.
7130
IAC sensor/
circuit
abnormality
1 If IAC 3 Arms is detected just
before the inverter starts, or
If IAC 3 Arms is detected dur-
ing inverter operation after 5
seconds has passed since the
inverter started when the INV
board’s SW1-1 is OFF.
[Inverter error detail : 6]
2 If the current sensor (ACCT)
miss-wiring is detected during
inverter operation.
[Inverter error detail : 13]