148
C) In case that power of the indoor units cannot be turned in individually. (CASE 2 )
a) Remove all CN41 connectors of the indoor units in the same group except those of the exchanged
indoor unit.
b) Turn on power of the indoor units and proceed to Procedure 3
∗ After Procedure 3 operation has finished, be sure to return the temporarily removed group wire
or CN41 connector to the original connection.
P.C. board parts layout drawing
Method of DIP switch setting
∗1 : Match to set up contents of P.C. board before replacement.
SW01
Bit 1
Bit 2
SW02
Bit 1
Bit 2
Selected content
Terminator resistor (for central control)
Remote controller A/B selection
Custom / Multi model selection
No use
MMK-AP
3H2UL series
1
1
ON
OFF
At shipment
OFF (Without terminator)
OFF (A selection)
OFF
OFF
A BAB A
×
B
Indoor unit
P.C. board
Remote
controller
Group wire
Group wire
Case 1)
Remove the group wire of the
terminal blocks A and B of the
changed indoor unit, and then
install the remote controller only.
Remove CN41 connectors of the indoor units other
than the units to be changed in the same group.
CN41
Indoor unit
Service P.C. board of the unit to be changed
A B A B
Indoor unit
P.C. board
Remote
controller
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