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98
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'17 • PAC-T-256
(20) Abnormal temperature thermistor (return air/indoor heat exchanger) broken wire/short-circuit detection
(a) Broken wire detection
When the return air temperature thermistor detects -55°C or lower or the heat exchanger temperature thermistor detect
-55°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).
■
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
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
CnT
①
Operation stop level
CnT
①
CnT
①
CnT
① +
CnTA
②
CnT
①
CnT
① /
CnTA
⑤
CnT
① /
CnTA
⑥
②
Operation stop pulse
CnT
②
CnT
②
CnT
② +
CnTA
③
CnT
②
CnT
② /
CnTA
⑤
CnT
② /
CnTA
⑥
③
Operation permission/prohibition level CnT
③ >
CnTA
①
CnT
③ >
CnTA
②
CnT
③ +
CnTA
③
CnT
③
CnT
③ /
CnTA
⑤
CnT
③ /
CnTA
⑥
④
Operation permission/prohibition pulse CnT
④
CnT
④
CnT
④ +
CnTA
③※
CnT
④
CnT
④ /
CnTA
⑤
CnT
④ /
CnTA
⑥
⑤
Cooling/heating selection level CnT
⑤ /
CnTA
①
CnT
⑤ /
CnTA
②
CnT
⑤ /
CnTA
③※
CnT
⑤ /
CnTA
④
CnT
⑤
CnT
⑤
⑥
Cooling/heating selection pulse CnT
⑥ /
CnTA
①
CnT
⑥ /
CnTA
②
CnT
⑥ /
CnTA
③
CnT
⑥ /
CnTA
④
CnT
⑥
CnT
⑥
(20) 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
CnTA
Blue
12V
XR6
1
2
Input/Output
Connector
Factory default setting RC-EX3 function name
Output
CnT-2
(XR1) Operation output
External output 1
CnT-3
(XR2) Heating output
External output 2
CnT-4
(XR3) Compressor ON output
External output 3
CnT-5
(XR4) Inspection(Error) output
External output 4
"Input
(Volt-free contact)"
CnT-6
(XR5) Remote operation input
External input 1
CnTA
(XR6) Remote operation input
External input 2
(a) Output for external control (remote display)
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"