Panasonic Cu 3ke19nbucu Technical Service Manual

IMPORTANT
These air conditioners employ new
refrigerant R410A.
Pay special attention when
servicing the unit.
Wall mounted type
CS-MKE7NKU
CS-MKE9NKU
CS-MKE12NKU
CS-MKE18NKU
CS-MKE24NKU< Applicable Indoor Units >
TECHNICAL & SERVICE MANUAL
OUTDOOR UNIT : CU-3KE19NBU
CU-4KE24NBU
CU-4KE31NBU
DC INVERTER MULTI-SYSTEM AIR CONDITIONER
Product Code No.
1 852 361 27
1 852 361 28
1 852 361 29
REFERENCE NO. 
SM700878
Capacity at 230V
19,100 BTU/h
23,200 BTU/h
30,600 BTU/hOutdoor Model No.
CU-3KE19NBU
CU-4KE24NBU...

•  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
2
4
6
7
8
17
20
21
24
27
50
56
62
68
71
77
80
81
82
83
87 ..............................................................................................................
......................................................................................................................
........................................................................................................

88
89
90
90
91
93
94
94
A-1 .........................................................................
...................................................................................................
................................................................................................
............................................................................................
.......................................................................................

    APPLICABLE INDOOR UNITS
CU-3KE19NBU
CU-4KE24NBU
CU-4KE31NBU Multi-Outdoor UnitIndoor Unit3-Room
4-Room
4-Room
CS-MKE7NKU
YES
YES
YESYES
YES
YESYES
YES
YESNO
YES
YES
CS-MKE9NKU CS-MKE12NKU CS-MKE18NKU CS-MKE24NKU
Wall Mounted Type
CU-3KE19NBU
CU-4KE24NBU
CU-4KE31NBU Multi-Outdoor UnitIndoor Unit3-Room
4-Room
4-Room
CS-MKE9NB4U&
CZ-18BT1U
YES
YES
YESYES
YES
YESCS-MKE12NB4U&
CZ-18BT1UCS-KE12NB4UW&
CZ-18BT1U
Semi-Concealed Type
YES
YES
YES
YES
YES
YES
6 

95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
80 °F DB / 67 °F WB
– DB / – WB
1.  OPERATING RANGE
Maximum
Minimum
Maximum
Minimum115 °F DB
14 °F DB
75 °F DB / 65 °F WB
– DB / 0 °F WB Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.
Cooling
Heating
7 

2.  SPECIFICATIONS
2-1.  Unit Specifications
Outdoor UnitCU-3KE19NBU
Indoor UnitCS-MKE9NKU × 2
Remarks:
1.  The values shown in performance section and electrical rating section above are based on the following unit combination.
  For other combination unit, please refer to the "Unit Combination Tables" in this manual.
                     Indoor Unit : CS-MKE9NKU   2units        Outdoor Unit : CU-3KE19NBU  1unit
  The combination indoor unit is AHRI 210/240.
2.  Rating conditions are:  Cooling :...

Outdoor UnitCU-3KE19NBU
Indoor UnitCS-MKE9NKU × 3
Remarks:
1.  The values shown in performance section and electrical rating section above are based on the following unit combination.
  For other combination unit, please refer to the "Unit Combination Tables" in this manual.
                     Indoor Unit : CS-MKE9NKU   3units        Outdoor Unit : CU-3KE19NBU  1unit
2.  Rating conditions are:  Cooling :  Indoor air temp.  80 °F DB / 67 °F WB  Heating :  Indoor air temp.  70 °F DB
      Outdoor...

Outdoor UnitCU-3KE19NBU
Indoor UnitCS-MKE9NKU ×
3
Remarks:
1.  The values shown in performance section and electrical rating section above are based on the following unit combination.
  For other combination unit, please refer to the "Unit Combination Tables" in this manual.
                     Indoor Unit : CS-MKE9NKU   3units        Outdoor Unit : CU-3KE19NBU  1unit
2.  Rating conditions are:  Cooling :  Indoor air temp.  80 °F DB / 67 °F WB  Heating :  Indoor air temp.  70 °F DB
      Outdoor...