Check code
Abnormal points and detection methods
Causes and checkpoints
When the connected indoor units or branch boxes exceed the limit, a
check code <7102> is displayed.
Connecting more indoor units and branch boxes than
the limit.
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 up to 2 branch boxes
●Diagnosis of defects
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis
Remedy
7102
(EF)
Connecting excessive number of units and branch boxes
Yes
No
No
Yes
88
OCH634C
Is an indoor unit connected?
Does it exceed the limit?
Connect indoor unit.
Connect less number of units and branch
boxes 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.
Check if at least 1 indoor unit is connected.
Check whether the connecting unit and
branch box exceeds the limit or not.
