Panasonic Cs Ksxxnb4x Cz 18bt1u Technical Service Manual

TECHNICAL & SERVICE MANUAL
CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA
DC INVERTER SPLIT SYSTEM AIR CONDITIONER
Indoor Unit
Outdoor Model No. Product Code No.
1 852 361 18
1 852 361 16
1 852 361 19
CS-KS12NB41 (Body) & CZ-18BT1U (Panel)
CS-KS18NB4UW (Body) & CZ-18BT1U (Panel)
CU-KS12NK1A
CU-KS18NKU
CU-KS18NKUA
REFERENCE NO. SM700879 Outdoor Unit
Indoor Model No.
Body (Panel)Product Code No.
Body (Panel)
1 852 361 04 (1 852 361 15)
1...

•  Before doing repair work, please read the "     SAFETY PRECAUTIONS" carefully and fully understand them. 
•  The precautionary items here are divided into "     Warning" and "     Caution" items. 
Items in particular which may cause death or serious injury to the service personnel if the work is not performed correctly, 
are included in the "     Warning" table.
However, even precautionary items identified as "     Caution" also have the potential for serious...

Warning
If refrigerant gas blows off during the work, do not touch the refrigerant gas as it may cause frostbite.
If refrigerant gas leaks during the work, ventilate the room.
If refrigerant gas catches fire, harmful gas may be generated.
Do not mix any gas other than the specified refrigerant gas in the refrigerating cycle. 
If air or other contaminants mix with the gas, pressure will become extremely high in the refrigerating cycle, 
which may cause a unit breakdown."
When the welded section of the...

Table of Contents
    SAFETY PRECAUTIONS
TABLE OF CONTENTS
1.   OPERATING RANGE
2.   SPECIFICATIONS
2-1. Unit Specifications 
2-2.  Major Component Specifications 
2-3.  Other Component Specifications 
3.   DIMENSIONAL DATA
4.   REFRIGERANT FLOW DIAGRAM
4-1. Refrigerant Flow Diagram
5.   PERFORMANCE DATA
5-1. Temperature Charts
5-2. Cooling Capacity
5-3.  Cooling Capacity (Low Ambient)
6.   ELECTRICAL DATA
6-1.   Electrical Characteristics
6-2.   Electric Wiring Diagrams
7.   MAINTENANCE
7-1.  Address...

10. CHECKING ELECTRICAL COMPONENTS
10-1.  Measurement of Insulation Resistance
10-2.  Checking Continuity of Fuse on PCB Ass'y
11. REFRIGERANT R410A: 
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
11-1.  Characteristics of New Refrigerant R410A
11-2.  Checklist before Servicing
11-3.  Tools Specifically for R410A
11-4.  Tubing Installation Procedures
11-5.  In Case of Compressor Malfunction
11-6.  In Case Refrigerant is Leaking
11-7.  Charging Additional Refrigerant
11-8.  Retro-Fitting Existing Systems...

95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
1.  OPERATING RANGE
Maximum
Minimum115 °F DB
67 °F DB Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.
Cooling
95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
Maximum
Minimum115 °F DB
0 °F DB Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.
Cooling
Models  : CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU
Models  : CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A
    CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA
6 

< 230V > Indoor UnitCS-KS18NB4UW & CZ-18BT1U
Outdoor UnitCU-KS18NKU
2-1-1.
Vertical
dB-A
dB-A Indoor : Hi/Me/Lo
Outdoor : Hi Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control8.3
1,860( 1.2 to 8.3 )
( 250 to 1,860 ) 17,500
5.15( 4,000 to 17,500 )
( 1.2 to 5.15 )Cooling
10,600
6,900 230V 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...

Indoor UnitCS-KS18NB4UW & CZ-18BT1U
Outdoor UnitCU-KS18NKU
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Remarks:Rating conditions are:
Cooling: Indoor air temperature 80 °F DB / 67 °F WB
Outdoor air temperature 95 °F DB / 75 °F WB
Shipping VolumeNet
Shipping WeightIb. (kg)
Ib. (kg)
cu.ft (m3) inch (mm) Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
DepthIndividual Unit
Body
(CS-KS18NB4UW)
Panel
(CZ-18BT1U) Indoor Unit(CS-KS18NB4UW & CZ-18BT1U)
inch (mm)
inch (mm)
inch (mm) Package Dimensions...

Indoor UnitCS-KS18NB4UW & CZ-18BT1U
Outdoor UnitCU-KS18NKU
< 208V >2-1-2.
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
6,900 208V 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...

Indoor UnitCS-KS18NB4UW & CZ-18BT1U
Outdoor UnitCU-KS18NKU
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Remarks:Rating conditions are:
Cooling: Indoor air temperature
Outdoor air temperature
Shipping VolumeNet
Shipping WeightIb. (kg)
Ib. (kg)
cu.ft (m3) inch (mm) Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
DepthIndividual Unit
Body
(CS-KS18NB4UW)
Panel
(CZ-18BT1U) Indoor Unit(CS-KS18NB4UW & CZ-18BT1U)
inch (mm)
inch (mm)
inch (mm) Package Dimensions Height
Width
Depthinch (mm)
inch (mm)...