Mitsubishi Electric MXZ-SM72TAM-U1 Service Manual page 81

7100 (EF): Total capacity error
Abnormal points and detection methods
The sum of the model class of the connected indoor units
exceeds the specified value (130% of the outdoor unit
model class), error code 7100 is displayed.
Diagnosis of failure
Check the total capacity of connected indoor
units.
Is the total under 130% of outdoor
unit capacity?
Check the capacity code switch (SW2 on the
indoor controller board) on the connected
indoor unit.
Is it set properly?
Check the model selection switch (SW4 on
the outdoor multi controller circuit board) of
the outdoor unit.
OCH800A_81
No
Yes
No
Yes
Is it set properly?
Yes
Causes and checkpoints
• The total of number on connected indoor unit model
names exceeds the specified capacity level.
• The setting of the model selection switches of the out-
door unit is registered wrongly.
Correct it so that the total capacity of
connected indoor units is under 130% of the
outdoor unit capacity.
Set the switch properly.
No
Set the switch properly.
Complete.