Fujitsu UTP-VX90A Installation Manual - Page 14

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Fujitsu UTP-VX90A Installation Manual
When connected to Apply voltage terminals of multiple DX-kits with a connected unit, be sure to
make a branch outside the DX-kit using a pull box, etc. as shown on below example.
Power supply
DC 12 to 24 V
Load
resistance
Load
resistance
connected unit
● Dry contact terminal ([CNA02], [CNA04] ,[CNA07])
When a power supply is unnecessary at the input device you want to connect, use the Dry
contact terminal ([CNA02], [CNA04], [CNA07]).
*c
*c
Ch 2
Ch 1
*c
Ch 3
*c
Ch 4
connected unit
*c Select very low current use contacts (usable at DC12V, DC1mA or less).
*d The wiring is different from Apply voltage terminals. Be suffi ciently careful when wiring.
When connected to Dry contact terminals of multiple indoor units with a connected unit,
insulate each indoor unit with relay, etc. as shown on below example.
K1
K2
K3
Input device 1
Input device 2
NOTE :
When connected to multiple indoor units directly, it will cause breakdown.
Operation behavior
● Input signal type
The input signal type can be selected.
It is switched by DIP switch on the indoor unit PCB.
DIP switch [Set 2 -2]
OFF (Factory setting)
ON
En-13
P.C.B.
Terminal
board
Control unit
Terminal
board
GND
P.C.B
K4
P.C.B
K5
P.C.B
K6
K1 - K6: Relay
(Device for DC Current)
Edge
Pulse
Input signal type
Edge
The width of pulse
must be longer than
Pulse
200m sec.
(1) ON/OFF SIGNAL (INPUT)
[For the "Edge" input method, function settings "60"=00]
Terminal block
ON/OFF SIGNAL
CNA01
(INPUT)
[For the "Edge" input method, function settings "60"=01]
Terminal block
CNA01
ON/OFF SIGNAL
(INPUT)
[For the "Pulse" input method]
CNA01
Terminal block
ON/OFF SIGNAL
(INPUT)
* The last command has priority.
* The indoor units within the same remote controller group operates in the same mode.
(2) ERROR SIGNAL (INPUT)
P.C.B.
If an error signal is input, perform protection operation (Thermostat OFF mode).
Make sure to install so that the input signals during normal operation is always "ON".
CNA02
Terminal block
ERROR SIGNAL
(INPUT)
*d
CNA04
(3) COOL/HEAT SIGNAL
Switch the operation mode (heating/cooling).
*d
["Edge" input method, function settings "60"=00]
CNA07
Terminal block
*d
COOL/HEAT
SIGNAL
["Edge" input method, function settings "60"=01]
Terminal block
COOL/HEAT
SIGNAL
Note
• In heat recovery system, HEAT/COOL switching during operation is disabled unless the
RB unit and DX-kit are connected in 1-to-1.
• If switching the operation mode directly from cooling to heating to cooling, set the
priority mode to "indoor unit priority" (*1), and set the DX-kit to "Administrative indoor
unit(or Master indoor unit) (*2)". Making this setting when the DX-kit and the VRF for
another indoor unit are connected to the same refrigerant system will make the DX-kit
prioritize the operation mode, so be careful.
*1) For the setting methods, refer to the installation manual for the outdoor unit in V-II and
J-II systems, and refer to the installation manual for the RB unit in VR-II system.
*2) For the settings method, see the wired remote controller installation manual and this
installation manual.
(4) FLOAT SW SIGNAL
Check the drain status.
If the "ON" status continues for 3 mins. or more, decide a drainage error, and perform a
protection stop. (Thermostat OFF and FAN OFF mode) Further, turn OFF and ON the
power again to restore.
["Edge" input only]
FLOAT SW SIGNAL
Input signal
OFF → ON
Pin1 to Pin3
ON → OFF
Input signal
OFF → ON
Pin1 to Pin3
ON → OFF
Input signal
Pin1 to Pin2
OFF → ON
Pin1 to Pin3
OFF → ON
Input signal
Pin1 to Pin2
OFF
Input signal
OFF → ON
Pin1 to Pin2
ON → OFF
Input signal
OFF → ON
Pin1 to Pin2
ON → OFF
Connector
Input signal
OFF → ON
Pin1 to Pin3
ON → OFF
Command
Operation
Operation stopped
Command
Cooling operation
Operation stopped
Command
Operation
Stop
Command
ON
Normal
Error
Command
Heat
Cool
Command
Heating operation
Operation stopped
Command
Protection operation
Normal