Daikin VKM50GAV1, Service Manual

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Operation Si71-812
16 Operation
[Points to be noted for VKM-GA(M)]
There are following restrictions with VKM-GA(M) model due to its own controlling structure.
1. Stand alone system: No address setting is required because of its automatic addressing function
(corresponding to VRV air conditioner PC-board : Master).
Because it is under a group control, it is always required to connect to a remote controller. The structure
does not permit if no remote controller is connected. A direct connection to a duct is also prohibited.
2. Interlock system : No address setting is required because of its automatic addressing function (Indoor
unit : Master).
•
Basically, the interlocking with an air-conditioner is only made via connection to a remote controller
line (P1, P2).
•
Number of units connectable in case of a remote controller group
Because 2 pieces of controlling PC-board have been built in a VKM-GAM model, count the remote
controller group as : 1 set = 2 units. The maximum number of units connectable to a remote controller
group is 16.
•
External contact point
If you want to start/stop through an external contact point, use external input terminals (T1 and T2).
* If you start/stop using T1 and T2 terminals, the entire remote controller group makes a start/stop.
Note 1) JC/J2 of ventilation PC-board cannot be used. (Because only the ventilation PC-board makes a
start/stop, no synchronized movement with the corresponding VRV indoor unit’s PC-board is
assured.)
<Example>
How many units of VKM-GAM model can be connected within a single group?
In case of a group composed of (10 × indoor units + VKM-GAM), the maximum number of VKM-GAM is 3.
10 + 3 × 2 = 16 units OK
In case of 4 units ;
10 + 4 × 2 = 18 units NG (2 units are in excess)
The display and operation of a
remote controller is the same as
a standard indoor unit.
Interlocking of a remote controller group