–
60
–
'17 • KX-T-259
Indoor unit outputs the following signal for operation status monitoring.
Output name
Condition
1 Operation output
During operation
2 Heating output
During heating operation
3 Compressor ON output
During compressor operation
4 Inspection (Error) output
When anomalous condition occurs.
5 Cooling output
During cooling operation
6 Fan operation output 1
When indoor unit's fan is operating
7 Fan operation output 2
When indoor unit's fan is operating, and fan speed is higher than Hi speed.
8 Fan operation output 3
When indoor unit's fan is operating, and fan speed is Lower than Me speed.
9 Defrost/oil return output
When indoor unit receive defrost/oil return signal from the outdoor unit.
10 Ventilation output
When "Venti.ON" is selected from remote control
11 Free cooling output
When the ambient temp. is between 10-18 C in cooling and fan operation
12 Indoor unit overload alrm output Refer to "IU overload alarm"
-
127
-
'16 • PAC-T-251
(16) Abnormal temperature thermistor (return air/indoor heat exchanger) broken wire/short-circuit detection
(a) Broken wire detection
When the return air temperature thermistor detects -20°C or lower or the heat exchanger temperature thermistor detect -40°C
or lower for 5 seconds continuously, the compressor stops. After a 3-minute delay, the compressor restarts but, if it is
detected again within 60 minutes after the initial detection for 6 minutes continuously, stops again (the return air temperature
thermistor: E7, the heat exchanger temperature thermistor: E6).
(b) Short-circuit detection
If the heat exchanger temperature thermistor detects 70°C or higher for 5 seconds continuously at 2 minutes and 20 seconds
after the compressor ON during cooling operation, the compressor stops (E6).
(17) External input/output control (CnT or CnTA)
External input/output connectors are provided on the indoor unit control PCB, and each input/output is possible to be changed by
RC-EX3. Be sure to connect the wired remote control to the indoor unit. Remote operation with CnT/CnTA only is not possible.
・
CnT
・
CnTA
XR1
1
2
3
4
5
6
XR3
XR4
CnT
Blue
12V
XR2
XR5
■
Priority order for combinations of CnT and CnTA input.
Note (1) Following operation commands are accepted when the operation prohibition is set with CnTA as indicated with *.
Individual operation command from remote control, test run command from outdoor unit and operation command from option device, CnT input.
Reference: Explanation on the codes and the combinations of codes in the table above
1.
In case of CnT “Number”, the CnT “Number” is adopted and CnTA is invalidated.
2.
In case of CnTA “Number”, the CnTA “Number” is adopted and CnT is invalidated.
3.
In case of CnT “Number”/CnTA “Number”, the CnT “Number” and the CnTA “Number” become independent functions each other.
4.
In case of CnT “Number” + CnTA “Number”, the CnT “Number” and the CnTA “Number” become competing functions each other.
5.
In case of CnT “Number” > CnTA “Number”, the function of CnT “Number” supersedes that of CnTA “Number”.
6.
In case of CnT “Number” < CnTA “Number”, the function of CnTA “Number” supersedes that of CnT “Number”.
(The “Number” above means
①
-
⑥
in the table.)
CnTA
Blue
12V
XR6
1
2
CnTA
①
Operation
stop level
②
Operation
stop pulse
③
Operation
permission/prohibition
④
Operation
permission/prohibition pulse
⑤
Cooling/heating
selection level
⑥
Cooling/heating
selection pulse
⑦
Emergency
stop
CnT
①
Operation stop level
CnT
①
②
Operation stop pulse
CnT
②
③
Operation permission/prohibition level CnT
③ >
CnTA
①
④
Operation permission/prohibition pulse CnT
④
⑤
Cooling/heating selection level CnT
⑤ /
CnTA
①
⑥
Cooling/heating selection pulse CnT
⑥ /
CnTA
①
CnT
①
CnT
②
CnT
③ >
CnTA
②
CnT
④
CnT
⑤ /
CnTA
②
CnT
⑥ /
CnTA
②
CnT
① +
CnTA
②
CnT
② +
CnTA
③
CnT
③ +
CnTA
③
CnT
④ +
CnTA
③※
CnT
⑤ /
CnTA
③※
CnT
⑥ /
CnTA
③
(a) Output for external control (remote display)
Following output connectors (CnT) are provided on the indoor control PCB for monitoring operation status.
①
Operation output:
Outputs DC12V signal for driving relay during operation
②
Heating output:
Outputs DC12V signal for driving relay during heating operation
③
Compressor ON output:
Outputs DC12V signal for driving relay when compressor is operating.
④
Error output:
Outputs DC12V signal for driving relay when anomalous condition occurs.
(b) Remote operation input
Remote operation input connector (CnT-6 or CnTA) is provided on the indoor control PCB.
However remote operation by CnT-6 or CnTA is not effective, when “Center mode” is selected by central control.
Only the “LEVEL INPUT” is acceptable for external input
, however when the indoor function setting of “Level
input (Factory default)” or “Pulse input” is selected by the function for “External input” of the wired remote control,
operation status will be changed as follows.
CnT
①
CnT
②
CnT
③
CnT
④
CnT
⑤ /
CnTA
④
CnT
⑥ /
CnTA
④
CnT
① /
CnTA
⑤
CnT
② /
CnTA
⑤
CnT
③ /
CnTA
⑤
CnT
④ /
CnTA
⑤
CnT
⑤
CnT
⑥
CnT
① /
CnTA
⑥
CnT
② /
CnTA
⑥
CnT
③ /
CnTA
⑥
CnT
④ /
CnTA
⑥
CnT
⑤
CnT
⑥
CnT
① <
CnTA
⑦
CnT
② <
CnTA
⑦
CnT
③ <
CnTA
⑦
CnT
④ <
CnTA
⑦
CnT
⑤ /
CnTA
⑦
CnT
⑥ /
CnTA
⑦
⑦
Emergency stop
CnT
⑦ >
CnTA
①
CnT
⑦ >
CnTA
②
CnT
⑦ >
CnTA
③
CnT
⑦ >
CnTA
④
CnT
⑦ /
CnTA
⑤
CnT
⑦ /
CnTA
⑥
CnT
⑦ +
CnTA
⑦
(b) Input for external control
The external input for the indoor unit can be selected from the following input.
Input name
Content
1 Run/Stop
Refer to [(17) (c) Emergency stop signal processing]
2 Premission/Prohibition
Refer to [(18) Operation permission/prohibition]
3 Cooling/Heating
Refer to [(20) Selection of cooling/heating external input function]
4 Emergency stop
Indoor/outdoor units stop the operation, and [E63] is displayed.
5 Setting temperature shift
Set temperature is shifted by +2/-2C in cooling/heating.
6 Forced thermo-OFF
Unit goes thermo off.
7 Temporary stop
Refer to [(19) Temporary stop input]
8 Silent mode
Outdoor unit silent mode is activate.
-
128
-
'16 • PAC-T-251
(i) In case of “Level input” setting (Factory default)
Input signal to CnT-6 or CnTA is
OFF→ON
…… unit
ON
Input signal to CnT-6 or CnTA is
ON→OFF
…… unit OFF
Operation is not inverted.
ON
ON
OFF
OFF
OFF
ON
ON
ON
ON
Remote
control OFF
Remote
control ON
OFF
OFF
OFF
CnT-6 or CnTA input
Unit A
Unit B
Note (1)
The latest operation has priority
It is available to operate/stop by remote control or central control
(ii) In case of “Pulse input” setting (Local setting)
It is effective only when the input signal to CnT-6 or CnTA is changed
OFF→ON
, and at that time unit operation
[ON
/
OFF] is inverted.
Remote
control OFF
Remote
control ON
ON
ON
OFF
OFF
ON
OFF
OFF
OFF
ON
ON
OFF
OFF
CnT-6 or CnTA input
Unit A
Unit B
(c) Remote operation
(i) In case of multiple units (Max. 16 indoor units group) are connected to one wired remote control
When the indoor function setting of wired remote control for “External control set” is changed from “Individual
(Factory default)”
to “ For all units”, all units connected in one wired remote control system can be controlled by
external operation input.
Individual operation (Factory default)
All units operation (Local setting)
CnT-6 or
CnTA
ON
OFF
ON
OFF
Only the unit
directly connected
to the remote control
can be operated.
Only the unit
directly connected
to the remote
control can be
stopped opeartion.
All units in one
remote control
system can be
operated.
All units in one
remote control
system can be
stopped operation.
Unit
⓪
only
Unit
⓪
only
Units
⓪
−Ⓝ
Units
⓪
−Ⓝ
When more than one indoor unit (Max. 16 indoor units) are conn
ected in one wired remote control system:
(1)
With the factory default, external input to CnT-6 or CnTA is effective for only the unit
⓪
.
(2)
When setting “For all unit”
(Local setting),
all units in one remote control system can be controlled by external
input to CnT-6 or CnTA on the indoor unit
⓪
.
(3)
External input to CnT-6 or CnTA on the other indoor unit than the unit
⓪
is not effective.
Ex. Indoor units =
＋①＋②＋③ｘ3＋……Ⓕ ≦16 units
0
XY
Wired remote control
Indoor unit
Signal &
Power
XY
123
123
XY
123
123
XY
123
123
XY
123
123
XY
123
123
XY
123
XY
123
Indoor unit
①
Outdoor unit Outdoor unit
①
Outdoor unit
②
Outdoor unit
③
Outdoor unit
Indoor unit
②
Indoor unit
③
(master)
Indoor unit
Ⓕ
Indoor unit
③
(slave)
Indoor unit
③
(slave)
C
n
External
input
Ⓕ
0
0
Refrigerant piping
