Check code
Abnormal points and detection methods
Causes and checkpoints
The address setting of connected unit is wrong.
There is a unit without correct address setting in the
range specified in "7-5. SYSTEM CONTROL".
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis
Remedy
7105
(EF)
Address setting error
<Outdoor unit>
<Indoor unit>
Yes
No
Is the address setting correct?
Set the address properly, then turn the
power OFF of indoor/outdoor unit, Fresh
Master, Lossnay and remote controller
simultaneously for 2 minutes or more, and
turn the power back ON.
Replace the indoor controller board.
Check whether the indoor unit address is
set in 00, or in the range of 01 to 50.
<Branch box>
Yes
No
Is the address setting correct?
Set the address properly, then turn the
power OFF of indoor/outdoor unit, Fresh
Master, Lossnay and remote controller
simultaneously for 2 minutes or more, and
turn the power back ON.
Replace the branch box controller board.
Check whether the branch box address is
set in 00, or in the range of 01 to 46.
Chart 1 of 2
Yes
No
Is the address setting correct?
Set the address properly, then turn the
power OFF of indoor/outdoor unit, Fresh
Master, Lossnay and remote controller
simultaneously for 2 minutes or more, and
turn the power back ON.
Replace the outdoor multi controller circuit
board.
Check whether the outdoor unit address is
set in 000, or in the range of 51 to 100.
98
99
OCH668B
