U-4LE1E5, U-4LE1E8, U-5LE1E5, U-5LE1E8, U-6LE1E5, U-6LE1E8 — Panasonic Air Conditioner Service Manual (repair manual)

Model
U-4LE1E5 U-4LE1E8 U-5LE1E5 U-5LE1E8 U-6LE1E5 U-6LE1E8
Pages
127
Size
7.25 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner / MINI VRF SYSTEM
File
u-4le1e5-u-4le1e8-u-5le1e5-u-5le1e8-u-6le1e5-u-6le.pdf
Date

View Panasonic U-4LE1E5 / U-4LE1E8 / U-5LE1E5 / U-5LE1E8 / U-6LE1E5 / U-6LE1E8 Service Manual online

85464849296003
REFERENCE NO.
SM830196-03
Mini VRF System
Outdoor Unit
Model No.
HP = horsepower
4HP
U-4LE1E5
5HP
U-5LE1E5
6HP
U-6LE1E5
U-4LE1E8
U-5LE1E8
U-6LE1E8
Model Name
Class
E1
High Static Pressure
Ducted
Indoor Unit
Class
22
U1
4-Way Cassette
S-22MU1E5
S-22MU1E51
L1
2-Way Cassette
S-22ML1E5
D1
1-Way Cassette
F1
Low Silhouette Ducted
S-22MF1E5
T1
Ceiling
K1
Wall Mounted
S-22MK1E5
R1
Concealed Floor
Standing
S-22MR1E5
P1
Floor Standing
S-22MP1E5
Y1
4-Way Cassette 60×60
S-22MY1E5
F2
Low Silhouette Ducted
S-22MF2E5
M1
Slim Low Static Ducted
S-22MM1E5
15
S-15MM1E5
28
S-28MU1E5
S-28MU1E51
S-28ML1E5
S-28MF1E5
S-28MD1E5
S-28MK1E5
S-28MR1E5
S-28MP1E5
S-28MY1E5
S-28MF2E5
S-28MM1E5
36
S-36MU1E5
S-36MU1E51
S-36ML1E5
S-36MF1E5
S-36MD1E5
S-36MK1E5
S-36MR1E5
S-36MP1E5
S-36MY1E5
S-36MF2E5
S-36MM1E5
S-36MT1E5
45
S-45MU1E5
S-45MU1E51
S-45ML1E5
S-45MF1E5
S-45MD1E5
S-45MK1E5
S-45MR1E5
S-45MP1E5
S-45MY1E5
S-45MF2E5
S-45MM1E5
S-45MT1E5
56
S-56MU1E5
S-56MU1E51
S-56ML1E5
S-56MF1E5
S-56MD1E5
S-56MK1E5
S-56MR1E5
S-56MP1E5
S-73ME1E5
S-106ME1E5
S-140ME1E5
S-56MY1E5
S-56MF2E5
S-56MM1E5
S-56MT1E5
60
S-60MU1E51
S-60MF2E5
73
S-73MU1E5
S-73MU1E51
S-73ML1E5
S-73MF1E5
S-73MD1E5
S-73MK1E5
S-71MR1E5
S-71MP1E5
S-73MF2E5
S-73MT1E5
90
S-90MU1E51
S-90MF1E5
S-90MF2E5
106
S-106MU1E5
S-106MU1E51
S-106MF1E5
S-106MK1E5
S-106MF2E5
S-106MT1E5
140
S-140MU1E5
S-140MU1E51
S-140MF1E5
S-140MF2E5
S-140MT1E5
160
S-160MU1E5
S-160MU1E51
S-160MF1E5
K2
Wall Mounted
S-22MK2E5
S-36MK2E5
S-28MK2E5
Y2
4-Way Cassette 60×60
S-22MY2E5
S-45MY2E5
S-56MY2E5
S-160MF2E5
Order No. SM830196-11CE
S-28MY2E5
S-36MY2E5
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IMPORTANT!
Please Read Before Starting
This air conditioner must be installed by the sales dealer 
or installer.
This information is provided for use only by authorized 
persons.
For safe installation and trouble-free operation, you must:
  Carefully read this instruction booklet before beginning.
  Follow each installation or repair step exactly as shown.
  This air conditioner shall be installed in accordance with 
National Wiring Regulations.
  This product is intended for professional use. 
Permission from the power supplier is required when 
installing the U-4LE1E8, U-5LE1E8, U-6LE1E8, 
outdoor units that are connected to a 16 A distribution 
network.
  This equipment complies with EN/IEC 61000-3-12 
provided that the short-circuit power Ssc is greater 
than or equal to the following table at the interface point 
between the user’s supply and the public system. 
It is the responsibility of the installer or user of 
the equipment to ensure, by consultation with the 
distribution network operator if necessary, that the 
equipment is connected only to a supply with a short-
circuit power Ssc greater than or equal to the value in 
the table.
U-4LE1E5
U-5LE1E5
U-6LE1E5
Ssc
350 kVA
400 kVA
550 kVA
  This equipment complies with EN/IEC 61000-3-11 
provided that the system impedance Zmax is less than 
or equal to the values corresponding to each model as 
shown in the table below at the interface point between 
the user’s supply and the public system. Consult with 
the supply authority for the system impedance Zmax.
U-4LE1E5
U-5LE1E5
U-6LE1E5
Zmax
0.298 
Ω
0.298
Ω
0.298
Ω
  Pay close attention to all warning and caution notices 
given in this manual.
WARNING
This symbol refers to a hazard or unsafe 
practice which can result in severe 
personal injury or death.
CAUTION
This symbol refers to a hazard or unsafe 
practice which can result in personal injury 
or product or property damage.
If Necessary, Get Help
These instructions are all you need for most installation 
sites and maintenance conditions. If you require help for a 
special problem, contact our sales/service outlet or your 
certified dealer for additional instructions.
In Case of Improper Installation
The manufacturer shall in no way be responsible for 
improper installation or maintenance service, including 
failure to follow the instructions in this document. 
SPECIAL PRECAUTIONS
WARNING
When Wiring
ELECTRICAL SHOCK CAN CAUSE 
SEVERE PERSONAL INJURY OR DEATH. 
ONLY A QUALIFIED, EXPERIENCED 
ELECTRICIAN SHOULD ATTEMPT TO 
WIRE THIS  SYSTEM. 
•  Do not supply power to the unit until all wiring and tubing 
are completed or reconnected and checked.
•  Highly dangerous electrical voltages are used in this 
system. 
Carefully refer to the wiring diagram and these 
instructions when wiring. Improper connections and 
inadequate grounding can cause accidental injury or 
death.
•  Connect all wiring tightly. Loose wiring may cause 
overheating at connection points and a possible fire 
hazard.
  Provide a power outlet to be used exclusively for each 
unit.
  ELCB must be incorporated in the fixed wiring.
Circuit breaker must be incorporated in the fixed wiring 
in accordance with the wiring regulations.
U-4LE1E5
U-5LE1E5
U-6LE1E5
Circuit breaker
30 A
40 A
40 A
U-4LE1E8
U-5LE1E8
U-6LE1E8
Circuit breaker
20 A
20 A
20 A
  Provide a power outlet exclusively for each unit, and 
full disconnection means having a contact separation 
in all poles must be incorporated in the fixed wiring in 
accordance with the wiring rules.
  To prevent possible hazards from insulation failure, 
the unit must be grounded.
When Transporting
Be careful when picking up and moving the indoor and 
outdoor units. Get a partner to help, and bend your knees 
when lifting to reduce strain on your back. Sharp edges 
or thin aluminum fins on the air conditioner can cut your 
fingers.
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When Connecting Refrigerant Tubing
• Ventilate the room well, in the event that is refrigerant 
gas leaks during the installation. Be careful not to allow 
contact of the refrigerant gas with a flame as this will 
cause the generation of poisonous gas.
• Keep all tubing runs as short as possible.
• Use the flare method for connecting tubing.
• Apply refrigerant lubricant to the matching surfaces 
of the flare and union tubes before connecting them, 
then tighten the nut with a torque wrench for a leak-free 
connection.
• Check carefully for leaks before starting the test run.
• Do not leak refrigerant while piping work for an
installation or re-installation, and while repairing
refrigeration parts.
Handle liquid refrigerant carefully as it may cause
frostbite.
WARNING
• When performing piping work do 
not mix air except for specified 
refrigerant (R410A) in refrigeration 
cycle. It causes capacity down, and 
risk of explosion and injury due to 
high tension inside the refrigerant 
cycle.
• Refrigerant gas leakage may cause 
fire.
Do not add or replace refrigerant
other than specified type.
It may cause product damage, burst
and injury etc.
When Servicing
• Turn the power OFF at the main power box 
(mains) before opening the unit to check or repair 
electrical parts and wiring.
Keep your fingers and clothing away from any moving 
parts.
Clean up the site after you finish, remembering to 
check that no metal scraps or bits of wiring have been 
left inside the unit being serviced.
WARNING
Do not clean inside the indoor and 
outdoor units by users. Engage 
authorized dealer or specialist for 
cleaning.
In case of malfunction of this 
appliance, do not repair by yourself. 
Contact to the sales dealer or service 
dealer for a repair.
CAUTION
• Do not touch the air inlet or the 
sharp aluminum fins of the 
outdoor unit. You may get injured.
•  Ventilate any enclosed areas when 
installing or testing the refrigeration 
system. Escaped refrigerant gas, on 
contact with fire or heat, can produce 
dangerously toxic gas.
•  Confirm after installation that no 
refrigerant gas is leaking. If the gas 
comes in contact with a burning stove, 
gas water heater, electric room heater 
or other heat source, it can cause the 
generation of poisonous gas.
Others
CAUTION
Do not touch the air inlet or the 
sharp aluminum fins of the 
outdoor unit. You may get injured.
Do not sit or step on the unit, 
you may fall down accidentally.
Do not stick any object into the 
FAN CASE. 
You may be injured and the 
unit may be damaged.
When Installing…
Select an installation location which is rigid and strong 
enough to support or hold the unit, and select a location 
for easy maintenance.
…In a Room
Properly insulate any tubing run inside a room to prevent 
“sweating” that can cause dripping and water damage to 
walls and floors.
CAUTION
Keep the fire alarm and the air outlet at least 
1.5 m away from the unit.
…In Moist or Uneven Locations
Use a raised concrete pad or concrete blocks to provide 
a solid, level foundation for the outdoor unit. This prevents 
water damage and abnormal vibration.
…In an Area with High Winds
Securely anchor the outdoor unit down with bolts and a 
metal frame. Provide a suitable air baffle.
…In a Snowy Area (for Heat Pump-type Systems)
Install the outdoor unit on a raised platform that is higher 
than drifting snow. Provide snow vents.
ii
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RoHS
· This product does not contain any hazardous 
substances prohibited by the RoHS Directive.
WARNING
· You are requested to use RoHS compliant 
parts for maintenance or repair.
2.
The standards for minimum room volume are as follows.
(1)
No partition (shaded portion)
(2)
When there is an effective opening with the adjacent room 
for ventilation of leaking refrigerant gas (opening without 
a door, or an opening 0.15% or larger than the respective 
floor spaces at the top or bottom of the door).
(3)
If an indoor unit is installed in each partitioned room and 
the refrigerant tubing is interconnected, the smallest room 
of course becomes the object. But when mechanical 
ventilation is installed interlocked with a gas leakage 
detector in the smallest room where the density limit is 
exceeded, the volume of the next smallest room becomes 
the object.
3.
The minimum indoor floor space compared with the 
amount of refrigerant is roughly as follows: (When the 
ceiling is 2.7 m high)
40.5
54.0
27.0
13.5
0.0
20
10
0
30
40
60
70
80
90 100
50
67.5
81.0
94.5
108.0
121.5
135.0
148.5
162.0
175.5
189.0
202.5
216.0
229.5
243.0
256.0
270.0
m
2
m
3
15
10
5
0
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
283.5
297.0
310.5
324.0
337.5
k
g
Check of Density Limit
The room in which the air conditioner is to be installed 
requires a design that in the event of refrigerant gas 
leaking out, its density will not exceed a set limit.
The refrigerant (R410A), which is used in the air conditioner, 
is safe, without the toxicity or combustibility of ammonia, and 
is not restricted by laws imposed to protect the ozone layer. 
However, since it contains more than air, it poses the risk of 
suffocation if its density should rise excessively. Suffocation 
from leakage of refrigerant is almost non-existent. With the 
recent increase in the number of high density buildings, 
however, the installation of multi air conditioner systems is 
on the increase because of the need for effective use of floor 
space, individual control, energy conservation by curtailing heat 
and carrying power, etc.
Most importantly, the multi air conditioner system is able 
to replenish a large amount of refrigerant compared to 
conventional individual air conditioners. If a single unit of the 
multi air conditioner system is to be installed in a small room, 
select a suitable model and installation procedure so that if the 
refrigerant accidentally leaks out, its density does not reach the 
limit (and in the event of an emergency, measures can be made 
before injury can occur).
In a room where the density may exceed the limit, create an 
opening with adjacent rooms, or install mechanical ventilation 
combined with a gas leak detection device. The density is as 
given below.
Total amount of refrigerant (k
g)
Min. volume of the indoor unit installed room (m
3
< Density limit (k
g/m
3
)
The density limit of refrigerant which is used in multi air 
conditioners is 0.3 k
g/m
3
 (ISO 5149).
NOTE
1.
If there are 2 or more refrigerating systems in a single 
refrigerating device, the amount of refrigerant should be as 
charged in each independent device.
For the amount of charge in this example:
The possible amount of leaked refrigerant gas in rooms A, 
B and C is 10 k
g.
The possible amount of leaked refrigerant gas in rooms D, 
E and F is 15 k
g.
e.g., charged 
amount (10 k
g)
Indoor unit
Outdoor unit
e.g., charged 
amount (15 k
g)
Room A
Room B
Room C
Room D
Room E
Room F
Outdoor unit
Refrigerant tubing
Indoor unit
Mechanical ventilation device – Gas leak detector
Refrigerant tubing
Outdoor unit
Indoor unit
Very 
small 
room
Small 
room
Medium 
room
Large room
Range below the 
density limit of 
0.3 k
g/m³
(Countermeasures 
not needed)
Range above the 
density limit of 0.3 
k
g/m³
(Countermeasures 
needed)
Total amount of refrigerant
Min. indoor volume
Min. indoor floor area
(when the ceiling is 2.7 m high)
iii
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