Panasonic Cs Kexxnb4x Cz 18bt1u Service Manual

							Indoor UnitCS-KE18NB4UW & CZ-18BT1U
Outdoor UnitCU-KE18NKU
< 208V >2-1-3.
Vertical
dB-A
dB-A Indoor : Hi/Me/Lo
Outdoor : Hi Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control9.1
1,860( 1.2 to 9.1 )
( 250 to 1,860 ) 17,500
5.15( 4,000 to 17,500 )
( 1.2 to 5.15 )Cooling
10,600
6,900208V Single-Phase 60Hz
187 to 253
Refrigerant Tubing  Connections Operation Sound
Electrical Rating
Sensible Capacity
Latent Capacity
W Power InputV
A Available Voltage  Range
Running Amperes
Narrow tube
Wide tube Refrigerant inch (mm)
Tube Diameter inch (mm)1/4 (6.35)
1/2 (12.7) ft (m) Max. allowable tubing length at shipmentFlare Type
25 (7.5) 44 / 40 / 36
5144 / 40 / 36
52 R410A / 2.87 (1,300)
Electric Expansion ValveWashable, Anti-Mold
DC Twin  Rotary  (Inverter)-
Auto Timer
Indoor / Outdoor Fan Speeds 
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Auto and 3 steps / Auto (Hi, Me, Lo)
Airflow Direction (Indoor) Horizontal Controls / Temperature Control
Control UnitMicroprocessor / I.C. Thermister
Wireless Remote Control Unit
Features
Compressor Locked Rotor AmperesBTU/h
Performance
% Power Factor 98
A 17.5 Voltage Rating
BTU/hkW Total Capacity
BTU/h
SEER BTU/Wh 16
341(579) / 294(500) / 253(430) Air Circulation  (Hi/Me/Lo) ft3/min (m3/h)
4.8920,400
6.0( 4,400 to 20,400 )
( 1.3 to 6.0 )Heating
-
-
383(651) / 324(551) / 265(450)
- Moisture Removal (High) Pints/h
HSPF BTU/Wh -
COP W/W -
EER BTU/h/W 9.41
Fuse or Circuit Breaker Capacity A 1511.5
2,340( 1.3 to 11.5 )
( 270 to 2,340 )
98
-
8.5 2.56-
Wired Remote Controller (Option) CZ-RD515U
11 
						

							Indoor UnitCS-KE18NB4UW & CZ-18BT1U
Outdoor UnitCU-KE18NKU
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Shipping VolumeNet
Shipping Weight Ib. (kg)
Ib. (kg)
cu.ft (m3) inch (mm) Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
DepthIndividual Unit
Body
(CS-KE18NB4UW)
Panel
(CZ-18BT1U) Indoor Unit(CZ-KE18NB4UW & CZ-18BT1U)
inch (mm)
inch (mm)
inch (mm) Package Dimensions Height
Width
Depthinch (mm)
inch (mm)
Shipping VolumeNet
Shipping Weight Ib. (kg)
Ib. (kg)
cu.ft (m3) inch (mm) Dimensions & Weight (Outdoor Unit)
Unit Dimensions Height
Width
DepthOutdoor Unit
(CU-KE18NKU)
inch (mm) (670)26-3/8
(880) 34-21/32
(285) 11-7/32
(1,012) 39-27/32
(44.0) 97.0
(48.0) 105.8
(0.28) 9.88
inch (mm)
inch (mm) Package Dimensions Height
Width
Depthinch (mm)
inch (mm)
< 208V >
-
-(313) 12-5/16
(625) 24-19/32
(625) 24-19/32
(18.7) 41.3-
-
-22-5/8 (575)
35.3 (16) 11-5/32 (283)
22-5/8 (575)
28-1/8 (714) 11-13/32 (290)
24-13/16 (630)
41.9 (19)
4.59 (0.13)24-19/32 (625)
6.0 (2.7) 1-9/16 (40)
24-19/32 (625)
26-11/16 (678)4-1/8 (105)
26-3/16 (665)
7.7 (3.5)
1.65 (0.04)
(733) 28-27/32
(379) 14-29/32
Remarks:Rating conditions are:
Cooling: Indoor air temperature 80 °F DB / 67 °F WB
Outdoor air temperature 95 °F DB / 75 °F WBHeating: Indoor air temperature 70 °F DB
Outdoor air temperature 47 °F DB / 43 °F WB
12 
						

							Indoor Unit (Body)CS-KE12NB41
Indoor Unit (Panel)CZ-18BT1U
2-2.  Major Component Specifications
2-2-1.  Indoor Unit
MPZN-12V ... 2 Flap Motor
TypeStepping Motor
Rating  Model ... Q'ty
Coil Resistance Ohm
(Ambient Temp. 77 °F (25 °C))Each Pair of Terminal : 380 +/- 7%DC 12V PLD-12115ST-1 ... 1
AC115V, 60Hz
10.8
101 +/- 10% Coil Resistance Model ... Q'ty
Rating Voltage, Hz
Input Drain Pump
OhmW
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Thermal Fuse
293 (145) (Ambient Temp. 68 °F (20 °C))
Safty Device
Open Type
°F (°C)
Aluminum Plate Fin / Copper Tube
2
18.1
2.94 (0.273)  Face Area  Coil
Rows
Fins per inch Heat Exchanger Coil
ft
2 (m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
 Ye s Control PCB
Control Circuit Fuse  ControlsPart No.
Microprocessor
250V 3A CB-CS-KE12NB4U
1 ... D12-5/8 / L5-3/4 (D322/L147)Turbo
DC Motor
SIC-62FW-D866-2 ... 1
8
- DC160V / 23W470 / 520
Internal Controller
Ye s
-
- Fan
Q'ty ... Dia. and Length Type
inch (mm)
 Fan Motor
Rating Voltage / Nominal Output
Coil ResistanceRough Measure RPM (Cool / Heat)Type
Model ... Q'ty
No. of Poles
Safety Device
Type
Over- Current Protection
Over- Heat Protection (Ambient Temp. 68 °F (20 °C))
Run Capacitor Micro F
VAC Ohm
13 
						

							Indoor Unit (Body)CS-KE18NB4UW
Indoor Unit (Panel)CZ-18BT1U
MP24ZN-12V ... 2 Flap Motor
TypeStepping Motor
Rating  Model ... Q'ty
Coil Resistance Ohm
(Ambient Temp. 77 °F (25 °C))Each Pair of Terminal : 380 +/- 7%DC 12V Aluminum Plate Fin / Copper Tube
2
18.1
2.94 (0.273)  Face Area  Coil
Rows
Fins per inch Heat Exchanger Coil
ft
2 (m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
  Control PCB
Control Circuit Fuse  ControlsPart No.
Microprocessor
250V 3A CB-CS-KE18NB4U
1 ... D12-5/8 / L5-3/4 (D322/L147)Turbo
DC Motor
SIC-62FV-D866-2 ... 1
8
- 650 / 720
Thermal Fuse
-
- Fan
Q'ty ... Dia. and Length Type
inch (mm)
 Fan Motor
Coil ResistanceRough Measure RPM (Cool / Heat)Type
Model ... Q'ty
No. of Poles
Safety Device
Type (Ambient Temp. 68 °F (20 °C))
Run Capacitor Micro F
VAC Ohm
PLD-12230ST-1 ... 1
AC208 to 240V, 60Hz
10.8
333 +/- 10% Coil Resistance Model ... Q'ty
Rating Voltage, Hz
Input Drain Pump
OhmW
Thermal Fuse
293 (145) (Ambient Temp. 68 °F (20 °C))
Safty Device
Open Type
°F (°C)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.Ye s Ye s Over- Current Protection
Over- Heat ProtectionDC340V / 20W Rating Voltage / Nominal Output
14 
						

							2-2-2.  Outdoor Unit
Control PCB
Control Circuit Fuse  ControlsPart No.
Microprocessor
125V 25A CB-CU-KE12NK1
DATA SUBJECT TO CHANGE WITHOUT NOTICE. Pints (cc)
 
WHT - BLU :
BLU - RED : RED - WHT :
77.5
77.5 77.5
 
Micro F
VAC
 External FinishAcrylic baked-on enamel finishFV50S ... 0.68 (320)
-
- Internal Controller
Ye s
Aluminum Plate Fin / Copper Tube
2
18.1
 Face Area
ft
2 (m2)3.95 (0.367)  Coil
Rows
Fins per inch Heat Exchanger Coil   
SIC-67FV-F460-1... 1  
Compressor Oil ...  Amount
8
50 750 / 750
 OhmDC Motor      Type
Compressor Model / Nominal Output Compressor
Coil Resistance (Ambient Temp. 68 °F (20 °C))
OhmDC Rotary (Hermetic)
G4C090LU1ER / 900W
U - V :
V - W :
W - U :0.81
0.81
0.81
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Safety Device
Micro F
VAC Run Capacitor
Crankcase HeaterYe s
Ye s
Ye s
Overload Relay
CS-7L115 Model
Operation Temp.
Open : 239 °F (115 °C), Close : 203 °F (95 °C)
-
-
115V 20W
1 ... D15-3/4 (D400) Fan
Propeller
Q'ty ... Dia. inch (mm) Type
Type
Over- Current Protection (Ambient Temp. 68 °F (20 °C))  Fan Motor
Nominal Output
Coil Resistance
Safety DeviceRough Measure RPM (Cool / Heat)
Run Capacitor Type
Model ... Q'ty
No. of Poles
W
Outdoor UnitCU-KE12NK1
15 
						

							Outdoor UnitCU-KE18NKU
Control PCB
Control Circuit Fuse  ControlsPart No.
Microprocessor
250V 25A CB-CU-KE18NKU
DATA SUBJECT TO CHANGE WITHOUT NOTICE. Pints (cc)
 
WHT - BLU :
BLU - RED : RED - WHT :
77.5
77.5 77.5
 
Micro F
VAC
 External FinishAcrylic baked-on enamel finishFV50S ... 0.74 (350)
-
- Internal Controller
Ye s
Aluminum Plate Fin / Copper Tube
2
21.2
 Face Area
ft
2 (m2)5.49 (0.510)  Coil
Rows
Fins per inch Heat Exchanger Coil 
SIC-67FV-F460-1 ... 1  
Compressor Oil ...  Amount
8
50 820 / 850
 OhmDC Motor      Type
Compressor Model / Nominal Output Compressor
Coil Resistance (Ambient Temp. 68 °F (20 °C))
OhmDC Twin Rotary (Hermetic)
C-6RVN93H0M / 1,050W
R - S :
S - T :
T - R :0.482
0.482
0.482
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Safety Device
Micro F
VAC Run Capacitor
Crankcase HeaterYe s
Ye s
Ye s
Overload Relay
CS-7L115 Model
Operation Temp.
Open : 239 °F (115 °C), Close : 203 °F (95 °C)
-
-
-
1 ... D16-17/32 (D420) Fan
Propeller
Q'ty ... Dia. inch (mm) Type
Type
Over- Current Protection (Ambient Temp. 68 °F (20 °C))  Fan Motor
Nominal Output
Coil Resistance
Safety DeviceRough Measure RPM (Cool / Heat)
Run Capacitor Type
Model ... Q'ty
No. of Poles
W
16 
						

							2-3.  Other Component Specifications
 
Indoor Unit CS-KE12NB41 & CZ-18BT1U
  CS-KE18NB4UW & CZ-18BT1U
Outdoor Unit CU-KE12NK1
 CU-KE18NKU
0
32 50 68 86 104 122 140 158 176 194
(0) (10) (20) (30) (40) (50) (60) (70) (80) (90) 40 60 80 100 120 140 160 180 200
20
50 1
0 2 3 4 5
6
7
8
9 10
59 68 77 86 95 104
(10) (15) (20) (25) (30) (35) (40)
• Indoor air temp sensor
  (Model:KTEC-35-S98)• Indoor heat exchanger sensor
  (Model:PT2M-51H-S3)
• Compressor temp sensor
  (CU-KE12NK1...
Model:DTN-TKS274Y TH2)
  (CU-KE18NKU...
Model:DTN-TKS293B)
Resistance (k ohm)Resistance (k ohm)
Temperature °F (°C)
• Outdoor air temp sensor
  (CU-KE12NK1...
Model:DTN-TKS269B)
  (CU-KE18NKU...
Model:TKS295B)
• Outdoor heat exchanger sensor
  (CU-KE12NK1...
Model:DTN-TKS274Y TH1)
  (CU-KE18NKU...
Model:TKS292B)
40
35
30
25
20
15
10
5
0
-4 5 14 23 32 41 50 59 68
(
-20)(-15)(-10) (-5) (0) (5) (10) (15) (20)
Resistance (k ohm)
Temperature °F (°C)
Temperature °F (°C)
17 
						

							3.  DIMENSIONAL DATA
Indoor Unit  CS-KE12NB41 & CZ-18BT1U
  CS-KE18NB4UW & CZ-18BT1U
6-5/16 6-11/16
1-3/16 (30)
4-19/32
1-25/32
1-25/32
2-3/32
8-15/32
22-5/8 (575)
11-5/32 (283)
3
65
Less than 31/32   Less than 31/32 
3-5/8
22-5/8 (575)
12-7/8
 Suspension bolt pitch
 Suspension bolt pitch21-1/32 (534)
21-1/32
 (534)
12-7/16
23-5/8 (600)
Ceiling opening dimensions
23-5/8 (600)
Ceiling opening dimensions
7
Center of
panel
24-19/32 (625)
24-19/32 (625)13-5/32 (334)
14-3/32 (358)
12 2
2
2
7-11/16
4-29/32
A View
8
1-3/16
21/32
3-1/8
The length of the suspension
bolts should be selected so that
there is a gap of 1-3/16" or 
the ceiling (21/32" or more
below the lower surface of the 
main unit), as shown in the
figure at right. If the suspension
bolts is too long, it will contact 
the ceiling panel and the unit 
cannot be installed.
A A
Air intake
Discharge outlet
Refrigerant tubing 
(liquid tube) 
dia.
1/4" (flared)
Refrigerant tubing
 (gas tube) 
dia. 1/2"
 (flared)
Drain tube connection port VP20 (outer dia. 1")
Power supply port
Suspension bolt hole (4 -  1/2" x 1-1/8" hole)
Fresh air intake duct connection port (dia. 3-7/8")
1
2
3
4
5
6
7
8
7-23/321-27/32 1-3/322-3/32
2-3/4 1-9/32
5-9/16
25/32
Unit : inch (mm)
18 
						

							10-13/16
3-19/32
ID:23/324-ID:15/16
21-3/16
6-3/32
4-9/32 2-5/32
Narrow tube service valve
dia.1/4" (6.35) Wide tube service valve
dia.3/8" (9.52) 3-19/32
15/32
10-7/16 (265)
11-13/32
12-7/16
 
Outdoor Unit CU-KE12NK1
Unit : inch (mm)
(852-0-0010-12700-0)
28-11/32 (720) 2-1/8
21-9/16 (548) 5/8
19 
						

							Narrow tube service valve
dia.1/4" (6.35)Wide tube service valve
dia.1/2" (12.70)
4-3/8 2-5/326-17/32
5-23/32 3/32
26-3/8(670) 23/32
1-13/16 34-21/32(880)23-15/16 5-11/32
15/32
11-7/32(285)
12-7/32
13-5/32
11-17/32
ID:23/324-ID:15/161-3/8
2-17/32
2-13/32
 
Outdoor Unit CU-KE18NKU
Unit : inch (mm)
(852-0-0010-13200-0)
20