Indoor P.C. board optional connector specifications <MCC-1402>
Connector
Function
No.
Option output
CN60
Outside error
CN80
input
CN70
Filter option
error
CN71
CHK Operation
check
CN72
DISP display
mode
EXCT demand
CN73
Pin
Specifications
No.
1
DC12V (COM)
2
Defrost output
3
Thermo. ON output
4
Cooling output
5
Heating output
6
Fan output
1
DC12V (COM)
2
DC12V (COM)
3
Outside error input
1
Filter/Option/Humidifier
setup input
2
0V
1
Check mode input
2
0V
1
Display mode input
2
0V
1
Demand input
2
0V
– 66 –
Remarks
ON during defrost operation of outdoor unit
ON during Real thermo-ON (Comp ON)
ON when operation mode is in cooling system
(COOL, DRY, COOL in AUTO cooling/heating)
ON when operation mode is in heating system
(HEAT, HEAT in AUTO cooling/heating)
ON during indoor fan ON
(Air purifier is used/Interlock cable)
(When continued for 1 minute)
Check code "L30" is output and forced operation stops.
Option error input is controlled. (Protective operation
for device attached to outside is displayed.)
∗ Setting of option error input is performed from remote
controller. (DN=2A)
Used for operation check of indoor unit.
(Commu–nication with outdoor unit or remote controller
is not performed, but the specified operation such as
indoor fan "H" or drain pump ON is output.)
Display mode enables indoor unit and remote controller
to communicate. (When power is turned on)
Forced thermo-OFF operation in indoor unit