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Check code
Meaning, detecting method
Cause
Checking method & Countermeasure
5301
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.
IAC sensor/
circuit
abnormality
1
If IAC
3 Amps is detected just
before the inverter starts, or
If IAC
3 Amps 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]
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.
7130
Check
code
6600
6602
Multiple address error
Transmission from units with the
same address is detected.
Note:
The address/attribute
shown on remote
controller indicates the
controller which has
detected error.
Transmission processor hardware
error
Though transmission processor
intends to transmit “0”, “1” is dis-
played on transmission line.
Note:
The address/attribute
shown on remote
controller indicates the
controller which has
detected error.
Meaning, detecting method
Cause
Checking method & Countermeasure
At the genration of 6600 error, release the error by
remote controller (with stop key) and start again.
a) If the error occures again within 5 minutes.
→
Search for the unit which has the same address
with that of the source of the trouble.
When the same address is found, turn off
the power source of outdoor unit, BC con-
troller, and indoor unit for 5 minutes or more
after modifying the address, and then turn
on it again.
b) When no trouble is generated even continuing
operation over 5 minutes.
→
The transmission wave shape/noise on the
transmission line should be investigated in ac-
cordance with <Investigation method of trans-
mission wave shape/noise>.
1) Two or more controllers of outdoor
unit, indoor unit, remote controller,
BC controller, etc. have the same
address.
2) In the case that signal has changed
due to noise entered into the trans-
mission signal.
1) At the collision of mutual transmission data generated during the wiring work or polarity
change of the transmission line of indoor or outdoor unit while turning the power source
on, the wave shape is changed and the error is detected.
2) 100V power source connection to indoor unit or BC controller.
3) Ground fault of transmission line.
4) Insertion of power supply connector (CN40) of plural outdoor units at the grouping of
plural refrigerant systems.
5) Insertion of power supply connector (CN40) of plural outdoor units in the connection
system with MELANS.
6) Faulty controller of unit in trouble.
7) Change of transmission data due to the noise in transmission.
8) Connection system with plural refrigerant systems or MELANS for which voltage is not
applied on the transmission line for central control.
[2] Communication / System
