Connecting Excessive Number Of Units - Mitsubishi PUMY-P60NKMU Technical & Service Manual

Check code
7102
Abnormal points and detection methods
When the connected AC unit exceeds the limit, a check code <7102> is
displayed.
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Check whether the connecting unit
exceeds the limit or not.
Does it exceed the limit?
Check if at least 1 indoor unit is connected.
Is an indoor unit connected?
OCH502C

Connecting excessive number of units

Diagnosis
Yes
No
No
Yes
Causes and check points
Connecting more AC units than the limit
Abnormal if connecting status does not comply with the
following limit;
Connectable up to 12 indoor units
Connect at least 1 indoor unit (Abnormal if connected
none)
Connectable only 1 ventilation unit
Connect less number of units than the
limit.
The model code of the connected indoor
unit can be displayed by an operation of
SW1 on the outdoor unit.
Check whether the M-NET line to the
indoor unit is connected or not.
78
Remedy
Connect indoor unit.