Panasonic Cs Kexxnb4x Cz 18bt1u Service Manual

Compressor
Accumulator
Wide tube
service
valve Wide tube
Narrow
tube
service
valve Narrow tube
Heat exchanger Heat exchanger
Muffler
Capillary 
tube for 
split flow
Cooling cycle
(Defrosting cycle)
Heating cycle
Indoor unit Outdoor unit
Electric
expansion
valve
Strainer
Strainer
M
Muffler O.D.
3/8"
(9.52 mm)
O.D.
1/4"
(6.35 mm)4-way
valveHigh pressure
switch
H.P.
4.  REFRIGERANT FLOW DIAGRAM
4-1.  Refrigerant Flow Diagram
Indoor Unit CS-KE12NB41 & CZ-18BT1UOutdoor Unit CU-KE12NK1
21 

Compressor
4-way
valveAccumulator
High pressure
switch Wide tube
service
valve Wide tube
Narrow
tube
service
valve Narrow tube
Heat exchanger
Muffler
Capillary 
tube for 
split flow
Cooling cycle
(Defrosting cycle)
Heating cycle
Indoor unit Outdoor unit
Electric
expansion
valve
Strainer
M
O.D.
1/2"
(12.7mm)
O.D.
1/4"
(6.35 mm)H.P.
Indoor Unit CS-KE18NB4UW & CZ-18BT1UOutdoor Unit CU-KE18NKU
Heat exchanger
Strainer
22 

Hi Fan Lo Fan
Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 115V)
(1) Low pressure performance chart
(2) Operating current performance chart
(3) Indoor discharge air performance chart
  Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
NOTE
5.  PERFORMANCE DATA
5-1.  Temperature Charts
Indoor Unit CS-KE12NB41 & CZ-18BT1U Outdoor Unit CU-KE12NK1
Low pressure at wide tube service valve
psig(MPaG) Operating...

High pressure at wide tube service valve
psig(MPaG) Operating current (A)
1314 16 17
12
1115
290
(2.0)
218
(1.5)363
(2.5)435
(3.0)
508
(3.5)
23
(-5)32
(0)41
(5)50
(10)59
(15)68
(20)77
(25)
23
(
-5)32
(0)41
(5)50
(10)59
(15)68
(20)77
(25)
131
(55)
122
(50)
113
(45)
104
(40)
95
(35)
86
(30)
77
(25)
68
(20)
Outdoor inlet air DB temp. °F(°C)
Outdoor inlet air DB temp. °F(°C)
Indoor discharge air temperature °F(°C)
23
(-5)32
(0)41
(5)50
(10)59
(15)68
(20)77
(25)Outdoor inlet air DB temp. °F(°C)
 
 
Indoor...

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
NOTE
Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V)
(1) Low pressure performance chart
(2) Operating current performance chart
(3) Indoor discharge air performance chart
 
 
Indoor Unit CS-KE18NB4UW & CZ-18BT1U Outdoor Unit CU-KE18NKU
Hi Fan Lo Fan
Low pressure at wide tube service valve
psig(MPaG) Operating current (A)73
(0.5)102
(0.7)131
(0.9)
Outdoor...

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
• Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in
  heating mode. (Refer to "8-2. Protective Functions     Overload prevention during heating.")
NOTE
 
 
Indoor Unit CS-KE18NB4UW & CZ-18BT1U Outdoor Unit CU-KE18NKU
High pressure at wide tube service valve
psig(MPaG) Operating current (A)
89 11 12
7
6 10...

5-2.  Cooling Capacity
Indoor Unit  : CS-KE12NB41 & CZ-18BT1U
Outdoor Unit  : CU-KE12NK1
Power Supply  :  115V Single Phase 60Hz
< Cooling Capacity >
TC : Total Cooling Capacity (BTU/h)   SHC : Sensible Heat Capacity (BTU/h)
1.
Rating conditions (#) 
:  Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB
:  Outdoor Ambient Temp. 95 °F (35 °C) DB
2.
3. Above data represents the value when the operation frequency of a compressor is fixed.Above data does not take Freeze Prevention...

Indoor Unit  : CS-KE18NB4UW & CZ-18BT1U
Outdoor Unit  : CU-KE18NKU
Power Supply  :  230V Single Phase 60Hz
< Cooling Capacity >
TC : Total Cooling Capacity (BTU/h)   SHC : Sensible Heat Capacity (BTU/h)
1.
Rating conditions (#) 
:  Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB
:  Outdoor Ambient Temp. 95 °F (35 °C) DB
2.
3. Above data represents the value when the operation frequency of a compressor is fixed.Above data does not take Freeze Prevention Protection during cooling...

5-3.  Cooling Capacity (Low Ambient)
Indoor Unit  : CS-KE12NB41 & CZ-18BT1U
Outdoor Unit  : CU-KE12NK1
Power Supply  :  115V Single Phase 60Hz
< Cooling Capacity (Low Ambient) >
TC : Total Cooling Capacity (BTU/h)   SHC : Sensible Heat Capacity (BTU/h)
1.
2. Above data represents the value when the operation frequency of a compressor is fixed.Above data does not take Freeze Prevention Protection during cooling operation into account. 
For this reason, the value may vary from the actual cooling...

Indoor Unit  : CS-KE18NB4UW & CZ-18BT1U
Outdoor Unit  : CU-KE18NKU
Power Supply  :  230V Single Phase 60Hz
< Cooling Capacity (Low Ambient) >
TC : Total Cooling Capacity (BTU/h)   SHC : Sensible Heat Capacity (BTU/h)
1.
2. Above data represents the value when the operation frequency of a compressor is fixed.Above data does not take Freeze Prevention Protection during cooling operation into account. 
For this reason, the value may vary from the actual cooling characteristics.
NOTE
 RATING CAPACITY:...