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Input
Name
DI2
External trouble Input
DI3
Forced thermostat OFF Input When signal input, AHU is in "thermostat-off" status forcibly.
DI4
Notice code Input
DI5
Operation Mode Input
(Cool / Heat)
Function
Mode Input Cool / Heat
DI2 ~ DI4 When Bit4 of SW502 is turned on in DDC type, capacity demand can be achieved by
short-circuiting Terminals DI2 to DI4.
Short - circuit
DI2 - DI2
DI3 - DI3
DI4 - DI4
* If all are short-circuited, the DI3 function has priority.
When SW701 is ON (no voltage), apply a voltage of DC12 V ± 10% and wiring as follows.
SIGNAL (+)
SIGNAL (-)
An AHU fan operation monitor (Field supply), could be
attached at this dry contact terminal (For example, the
abnormality of the fan motor).
A closed contact generates the check code L30.
• If there is input, a spanner mark will be displayed on the
remote controller.
The system will not stop.Check "DN settings" for the
setting method.
• Enter the Notice code when you want to report an
abnormality that does not stop the air conditioner from the
outside.
• Used by switching functions with settings of Code No.
(DN Code).
• Notice code is continuously issued while input signal is
ON.
• 201 is displayed in the Notice code history when there is
input in DI4.
* Notice code is a function dedicated to TU2C-LINK
communication.
Set data corresponding to Notice code to be used to one of
Code No. 180 to 189, in accordance with following table.
In case where data other than 0000 is already set, set to
other Code No. (DN Code).
Code No. (DN)
0180 ~ 189
*1: Refer to the Service Manual for support.
* It may take up to ten minutes to be displayed on remote
controller after Notice code is issued.
Digital Input to control Mode:-
• Only cool mode and heat mode are available.
Terminal
DI5 /
DI5
COOL mode active
Cooling step
2
5
11
MAX. 328'1" (100 m)
Locally procured
Signal Voltage (DC12 V ± 10%)
DI2 - DI4
GND
DI2 - DI4
Normally open
– 17 –
Description
Set data
Notice code display
0000
None (Factory default)
0129
201 (DI4 /
DI4 Notice input ON)
0134
206 (Tx sensor*¹ trouble)
Function
SHORT
HEAT mode active
Heating step
3
9
13
(+)
(-)
✓ : Available
✕ : Prohibition
TA
DDC
TF
✓
✓
✓
✓
✓
✓
✓
✓
✓
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