-
92
-
'20 • KX-T-347
■
Priority order for combinations of CnT and CnZ input.
Note (1) Following operation commands are accepted when the operation prohibition is set with CnZ as indicated with *.
Individual operation command from remote control, test run command from outdoor unit and operation command from option device, CnT input.
CnZ
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
CnT
①
+
CnZ
②
CnT
①
+
CnZ
②
CnT
①
CnT
①
/
CnZ
⑤
CnT
①
/
CnZ
⑥
CnT
①
<
CnZ
⑦
②
Operation stop pulse CnT
②
CnT
②
+
CnZ
②
CnT
②
+
CnZ
③
CnT
②
CnT
②
/
CnZ
⑤
CnT
②
/
CnZ
⑥
CnT
②
<
CnZ
⑦
③
Operation permission/prohibition level
CnT
③
>
CnZ
①
CnT
③
>
CnZ
②
CnT
③
+
CnZ
③
CnT
③
CnT
③
/
CnZ
⑤
CnT
③
/
CnZ
⑥
CnT
③
<
CnZ
⑦
④
Operation permission/prohibition pulse
CnT
④
CnT
④
CnT
④+
CnZ
③※
CnT
④
CnT
④
/
CnZ
⑤
CnT
④
/
CnZ
⑥
CnT
④
<
CnZ
⑦
⑤
Cooling/heating selection level
CnT
⑤
/
CnZ
①
CnT
⑤
/
CnZ
②
CnT
⑤
/
CnZ
③
CnT
⑤
/
CnZ
④
CnT
⑤
CnT
⑤
CnT
⑤
/
CnZ
⑦
⑥
Cooling/heating selection pulse
CnT
⑥
/
CnZ
①
CnT
⑥
/
CnZ
②
CnT
⑥
/
CnZ
③
CnT
⑥
/
CnZ
④
CnT
⑥
CnT
⑥
CnT
⑥
/
CnZ
⑦
⑦
Emergency stop
CnT
⑦
>
CnZ
①
CnT
⑦
>
CnZ
②
CnT
⑦
>
CnZ
③
CnT
⑦
>
CnZ
④
CnT
⑦
/
CnZ
⑤
CnT
⑦
/
CnZ
⑥
CnT
⑦
+
CnZ
⑦
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 Thermostat 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
℃
in cooling and fan operation
12 Indoor unit overload alrm output Refer to "IU overload alarm"
13 Heater output Refer to "(8) Thermostat operation (b) Heating"
-
127
-
'16 • PAC-T-251
(18)
Abnormal temperature thermistor (return air/indoor heat exchanger) broken wire/short-circuit detection
(a) Broken wire detection
(b) Short-circuit detection
If the heat exchanger temperature thermistor detects short-circuit for 5 seconds continuously at 2 minutes and 20 seconds
after the compressor ON during cooling operation, the compressor stops (E6).
(19) External input/output control (CnT or CnZ)
External input/output connectors are provided on the indoor unit control PCB, and each input/output is possible to be changed by
RC-EX3A. Be sure to connect the wired remote control to the indoor unit. Remote operation with CnT/CnZ only is not possible.
・
CnT
・
CnZ
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 CnZ is invalidated.
2.
In case of CnZ “Number”, the CnZ “Number” is adopted and CnT is invalidated.
3.
In case of CnT “Number”/CnZ “Number”, the CnT “Number” and the CnZ “Number” become independent functions each other.
4.
In case of CnT “Number” + CnZ “Number”, the CnT “Number” and the CnZ “Number” become competing functions each other.
5.
In case of CnT “Number” > CnZ “Number”, the function of CnT “Number” supersedes that of CnZ “Number”.
6.
In case of CnT “Number” < CnZ “Number”, the function of CnZ “Number” supersedes that of CnT “Number”.
(The “Number” above means
①
-
⑦
in the table.)
CnZ
White
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
If the return air temperature thermistor detects broken wire for 5 seconds continuously, the compressor stops (E7). If the heat
exchanger temperature thermistor detects broken wire for 5 seconds continuously at 2 minutes and 20 seconds after the
compressor ON, the compressor stops (E6).
(b) Input for external control
The external input for the indoor unit can be selected from the following input by the wired remote control.
The input connectors (CnT-6 and CnZ) are equipped on the indoor
unit
control PCB.
“LEVEL INPUT(Factory default)” or ”PULSE INPUT” is selectable from the wired remote control.
Input name Content
1 Run/Stop (Factory default) Refer to [(19) (c) Remote operation input]
2 Permission/Prohibition Refer to [(20) Operation permission/prohibition]
3 Cooling/Heating Refer to [(22) Selection of cooling/heating external input function]
4 Emergency stop Refer to [(23) Emergency stop input]
5 Setting temperature shift Set temperature is shifted by +2/-2
℃
in cooling/heating.
6 Forced thermo-OFF Unit goes thermo off.
7 Temporary stop Refer to [(21) Temporary stop input]
8 Silent mode Outdoor unit silent mode is activated.
(c) Remote operation input
The indoor unit operation can be controlled by external input.
However it is not effective when “Center mode” is selected by central control.
Only the “LEVEL INPUT” is recommended for this input, and operation status is changed as follows.
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