Mitsubishi Electric CITY MULTI PUMY-P112VKM6 Service Manual page 81

7105 (EF): Address setting error
Abnormal points and detection methods
The address setting of connected outdoor unit is wrong.
Diagnosis of failure
<Outdoor unit>
Check whether the outdoor unit address is set in
000, or in the range of 51 to 100.
<Indoor unit>
Check whether the indoor unit address is set in
00, or in the range of 01 to 50.
<Branch box>
Check whether the branch box address is set in
00, or in the range of 01 to 46.
OCH790 _81
Is the address setting correct?
Yes
Is the address setting correct?
Yes
Is the address setting correct?
Yes
Causes and checkpoints
There is a unit without correct address setting in the range
specified in the installation manual.
Set the address properly, then turn the power
No
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.
Set the address properly, then turn the power
No
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.
Set the address properly, then turn the power
No
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.
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