Address Setting Error; 7105 - Mitsubishi Electric PUMY-P250YBM Technical & Service Manual

Check code

7105

(EF)
Abnormal points and detection methods
The address setting of connected unit is wrong.
●Diagnosis of defects
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
<Outdoor unit>
Check whether the outdoor unit address is
set in 000, or in the range of 51 to 100.
Is the address setting correct?
<Indoor unit>
Check whether the indoor unit address is
set in 00, or in the range of 01 to 50.
Is the address setting correct?
<Branch box>
Check whether the branch box address is
set in 00, or in the range of 01 to 46.
Is the address setting correct?
OCH760

Address setting error

Diagnosis
Yes
Yes
Yes
Causes and checkpoints
There is a unit without correct address setting in the
range specified in "7-3. SYSTEM CONTROL".
Set the address properly, then turn the
power OFF of indoor/outdoor unit, Fresh
Master, Lossnay and remote controller
No
simultaneously for 2 minutes or more, and
turn the power back ON.
Replace the outdoor multi controller circuit
board.
Set the address properly, then turn the
power OFF of indoor/outdoor unit, Fresh
Master, Lossnay and remote controller
No
simultaneously for 2 minutes or more, and
turn the power back ON.
Replace the indoor controller board.
Set the address properly, then turn the
power OFF of indoor/outdoor unit, Fresh
Master, Lossnay and remote controller
No
simultaneously for 2 minutes or more, and
turn the power back ON.
Replace the branch box controller board.
90
Chart 1 of 2
Remedy