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7.2 Unit Matching
Provided that only the multi VRF unit is required for a particular project and the outdoor unit with a
connection board is being used, one FHQWUDOZLUHG controller can control a maximum of 16 indoor units
matched with a maximum of three connection boards. If the outdoor unit without a connection board is
being used, one FHQWUDOZLUHG controller can control a maximum of 16 indoor units and maximum of three
outdoor units.
Provided that only the duct type indoor unit (one outdoor unit is matched with one indoor unit) is required
for a particular project, one FHQWUDOZLUHG controller can control up to 16 duct type indoor units.
Provided that both duct type units and the multi VRF units are required for a particular project, a maximum
of three ports of the FHQWUDOZLUHG controller can be connected with the multi VRF units. The maximum
permissible quantity of all indoor units at the four ports is 16.
Example 1:
Suppose that there are three multi VRF outdoor units, 10 multi VRF indoor units, five duct type outdoor
units and five duct type indoor units for a particular project. Only one FHQWUDOZLUHG controller is required
Project Demand Multi VRF System Duct Type Unit
Multi VRF
Outdoor Unit
Connection
Board
Multi
VRF
Series E Duct
Type Outdoor
Uni
Duct Type
Indoor Unit
&MV-R300W
//
<8' '%'
Quantity(set) 3 0 10 5 5
Quantity
(&HQWUDOZLUHG controller)
1.
Example 2:
Suppose that there are two &095: outdoor units and 32 multi VRF indoor units. TwoFHQWUDO
ZLUHG controllers are required, as shown in the table below:
Project Demand Multi VRF System
Outdoor Unit Connection Board Indoor Unit
//
Quantity (set) 2 4 32
Quantity
(&HQWUDO:LUHG controller)
2
7.3 Debugging and Viewing the Port No. and the Indoor Unit Address
Debugging setting: when the unit is initially powered up, when the project setting changes or when the
serial port is replaced, one may enter debugging mode by pressing Mode and Thu simultaneously for five
seconds. The debugging setting automatically checks and distributes the indoor unit address. Debugging
will be completed 10 minutes later. The indoor unit which receives the address is under control and the
unaddressed indoor unit is not.
Viewing the serial port and the indoor unit address: One may access the debugging page by pressing
Mode and Thu simultaneously for five seconds, at which point one may view the serial port and address
of the corresponding indoor unit.
Pressing on Confirm/Cancel will confirm this debugging setting and open the current indoor unit
viewing state; otherwise this setting will not be saved.
See Fig.7.7 for the debugging operation demonstration. Fig.7 shows the indoor unit 1 and indoor unit 2
both of which are connected with the port COM2. The address of one is 01 and of the other is 04.,
Press “Confirm/Cancel” to mahe a
confirmation.
Press “Mode” and "Thu" simultaneously
for five seconds to go to the debugging
page.
Press the code button of the indoor unit
to inquire about its corresponding serial
port and address.
Fig.7.7 Debugging
7.4 Labeling
A label is provided to identify the relationship between the indoor unit No. and the corresponding
room name. The user can write down the indoor unit No. and its corresponding room name on the label
which will then be stuck to the inside of the FHQWUDOZLUHG controller cover so that the user will have clear
information about the control object.
For instance, when the user has installed the air conditioners in the children's room, bedroom and living
room, following debugging one may view the indoor unit No. of each room and clarify its corresponding
relationship.
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&MV-R300W
19


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