Carrier 42LUVH055N, 38LUVH055N, 42LUVH065N, 38LUVH065N, 42LUVH075N Service Manual
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Air Conditioner Service Manual
DC Inverter Hi-Wall
Model
Description Refrigerant
Power supply
42/38LUVH055N
21K HP R410A
1Ph,220-240V,50Hz
42/38LUVH065N
24K HP R410A
1Ph,220-240V,50Hz
42/38LUVH075N
28K HP R410A
1Ph,220-240V,50Hz
CONTENTS
1. Precaution .................................................................................................................................................... 1
1.1 Safety Precaution .................................................................................................................................................... 1
1.2 Warning ................................................................................................................................................................... 1
2. Function ........................................................................................................................................................ 3
3. Dimension .................................................................................................................................................... 5
3.1 Indoor Unit ................................................................................................................................................................. 5
3.2 Outdoor Unit .............................................................................................................................................................. 5
4. Refrigerant cycle diagram .......................................................................................................................... 6
5. Wiring diagram ............................................................................................................................................. 7
5.1 Indoor Unit ................................................................................................................................................................. 7
42LUVH055N 42LUVH065N 42LUVH075N..................................................................................................... 7
5.2 Outdoor Unit .............................................................................................................................................................. 8
38LUVH055N 38LUVH065N .................................................................................................................................. 8
38LUVH075N ............................................................................................................................................................... 8
6. Installation details ........................................................................................................................................ 9
6.1 Wrench torque sheet for installation .......................................................................................................................... 9
6.2 Connecting the cables ............................................................................................................................................... 9
6.3 Pipe length and the elevation .................................................................................................................................. 10
6.4 Air purging of the piping and indoor unit .................................................................................................................. 11
6.5 Pumping down (Re-installation) ............................................................................................................................... 12
6.6 Re-air purging (Re-installation) ................................................................................................................................ 13
6.7 Balance refrigerant of the 2-way, 3-way valves........................................................................................................ 14
6.8 Evacuation ............................................................................................................................................................... 15
6.9 Gas charging ........................................................................................................................................................... 16
7. Capacity table ............................................................................................................................................. 17
42/38LUVH055N ........................................................................................................................................................... 17
42/38LUVH065N ........................................................................................................................................................... 18
42/38LUVH075N ........................................................................................................................................................... 19
8. Electronic function .................................................................................................................................... 20
8.1 Abbreviation .......................................................................................................................................................... 20
8.2 Display function ................................................................................................ ..................................................... 20
8.3 Protection .............................................................................................................................................................. 20
8.4 Fan-Only Mode ..................................................................................................................................................... 21
8.5 Cooling Mode ........................................................................................................................................................ 21
8.6 Drying mode .......................................................................................................................................................... 22
8.7 Heating mode ........................................................................................................................................................ 23
8.8 Auto mode function ............................................................................................................................................... 26
8.9 Forced operation function ..................................................................................................................................... 26
8.10 Action of 4-way valve .......................................................................................................................................... 26
8.11 Two speeds outdoor fan function ......................................................................................................................... 26
8.12 Timer function ..................................................................................................................................................... 27
8.13 Sleep function mode ........................................................................................................................................... 27
8.14 Auto-Restart function .......................................................................................................................................... 27
8.15 Ionizer/Plasma dust collector function(optional) .................................................................................................. 27
9. Troubleshooting ......................................................................................................................................... 28
9.1 Indoor Unit Error Display ....................................................................................................................................... 29
9.2 Diagnosis and Solution ......................................................................................................................................... 31
9.3 Key parts checking. ............................................................................................................................................... 35
1
1. Precaution
1.1 Safety Precaution
To prevent injury to the user or other people
and property damage, the following instructions
must be followed.
Incorrect operation due to ignoring
instruction will cause harm or damage.
Before service unit, be sure to read this
service manual at first.
1.2 Warning
Installation
Do not use a defective or underrated circuit
breaker. Use this appliance on a dedicated circuit.
There is risk of fire or electric shock.
For electrical work, contact the dealer, seller,
a qualified electrician, or an Authorized service
center.
Do not disassemble or repair the product, there is risk
of fire or electric shock.
Always ground the product.
There is risk of fire or electric shock.
Install the panel and the cover of control box
securely.
There is risk of fire of electric shock.
Always install a dedicated circuit and breaker.
Improper wiring or installation may cause fore or
electric shock.
Use the correctly rated breaker of fuse.
There is risk of fire or electric shock.
Do not modify or extend the power cable.
There is risk of fire or electric shock.
Do not install, remove, or reinstall the unit by
yourself (customer).
There is risk of fire, electric shock, explosion, or
injury.
Be caution when unpacking and installing the
product.
Sharp edges could cause injury, be especially careful
of the case edges and the fins on the condenser and
evaporator.
For installation, always contact the dealer or
an Authorized service center.
There is risk of fire, electric shock, explosion, or
injury.
Do not install the product on a defective
installation stand.
It may cause injury, accident, or damage to the
product.
Be sure the installation area does not
deteriorate with age.
If the base collapses, the air conditioner could fall
with it, causing property damage, product failure, and
personal injury.
Do not let the air conditioner run for a long
time when the humidity is very high and a door or a
window is left open.
Moisture may condense and wet or damage furniture.
Take care to ensure that power cable could
not be pulled out or damaged during operation.
There is risk of fire or electric shock.
Do not place anything on the power cable.
There is risk of fire or electric shock.
Do not plug or unplug the power supply plug
during operation.
There is risk of fire or electric shock.
Do not touch (operation) the product with wet
hands.
There is risk of fire or electric shock.
Do not place a heater or other appliance near
the power cable.
There is risk of fire and electric shock.
Do not allow water to run into electric parts.
It may cause fire, failure of the product, or electric
shock.
Do not store or use flammable gas or
combustible near the product.
There is risk of fire or failure of product.
Do not use the product in a tightly closed
space for a long time.
Oxygen deficiency could occur.
When flammable gas leaks, turn off the gas
and open a window for ventilation before turn the
product on.
Do not use the telephone or turn switches on or off.
There is risk of explosion or fire.
If strange sounds, or small or smoke comes
from product. Turn the breaker off or disconnect the
power supply cable.
There is risk of electric shock or fire.
Stop operation and close the window in
storm or hurricane. If possible, remove the product
from the window before the hurricane arrives.
There is risk of property damage, failure of product,
or electric shock.
Do not open the inlet grill of the product
2
during operation. (Do not touch the electrostatic
filter, if the unit is so equipped.)
There is risk of physical injury, electric shock, or
product failure.
When the product is soaked (flooded or
submerged), contact an Authorized service center.
There is risk of fire or electric shock.
Be caution that water could not enter the
product.
There is risk of fire, electric shock, or product
damage.
Ventilate the product from time to time when
operating it together with a stove, etc.
There is risk of fire or electric shock.
Turn the main power off when cleaning or
maintaining the product.
There is risk of electric shock.
When the product is not be used for a long
time, disconnect the power supply plug or turn off
the breaker.
There is risk of product damage or failure, or
unintended operation.
Take care to ensure that nobody could step
on or fall onto the outdoor unit.
This could result in personal injury and product
damage.
CAUTION
Always check for gas (refrigerant) leakage
after installation or repair of product.
Low refrigerant levels may cause failure of product.
Install the drain hose to ensure that water is
drained away properly.
A bad connection may cause water leakage.
Keep level even when installing the product.
To avoid vibration of water leakage.
Do not install the product where the noise or
hot air from the outdoor unit could damage the
neighborhoods.
It may cause a problem for your neighbors.
Use two or more people to lift and transport
the product.
Avoid personal injury.
Do not install the product where it will be
exposed to sea wind (salt spray) directly.
It may cause corrosion on the product. Corrosion,
particularly on the condenser and evaporator fins,
could cause product malfunction or inefficient
operation.
Operational
Do not expose the skin directly to cool air for
long periods of time. (Do not sit in the draft).
This could harm to your health.
Do not use the product for special purposes,
such as preserving foods, works of art, etc. It is a
consumer air conditioner, not a precision
refrigerant system.
There is risk of damage or loss of property.
Do not block the inlet or outlet of air flow.
It may cause product failure.
Use a soft cloth to clean. Do not use harsh
detergents, solvents, etc.
There is risk of fire, electric shock, or damage to the
plastic parts of the product.
Do not touch the metal parts of the product
when removing the air filter. They are very sharp.
There is risk of personal injury.
Do not step on pr put anything on the product.
(outdoor units)
There is risk of personal injury and failure of product.
Always insert the filter securely. Clean the
filter every two weeks or more often if necessary.
A dirty filter reduces the efficiency of the air
conditioner and could cause product malfunction or
damage.
Do not insert hands or other object through
air inlet or outlet while the product is operated.
There are sharp and moving parts that could cause
personal injury.
Do not drink the water drained from the
product.
It is not sanitary could cause serious health issues.
Use a firm stool or ladder when cleaning or
maintaining the product.
Be careful and avoid personal injury.
Replace the all batteries in the remote control
with new ones of the same type. Do not mix old and
mew batteries or different types of batteries.
There is risk of fire or explosion.
Do not recharge or disassemble the batteries.
Do not dispose of batteries in a fire.
They may burn of explode.
If the liquid from the batteries gets onto your
skin or clothes, wash it well with clean water. Do not
use the remote of the batteries have leaked.
The chemical in batteries could cause burns or other
health hazards
3
2. Function
When the power supply is
interrupted and then restore, the air
conditioners automatically restore
the previous function setting.
Tele Remote control (Optional)
Maintain the room temperature in accordance with the
setting temperature.
The mode can be change by the room temperature.
The louver can be set at the desired position or
swing up and down automatically
The function is usually used in rainy days in
springtime or damp areas.
The fan is turn to low speed (cooling/heating).
The unit will be turn off at the seventh hour.
The unit will decide the louver direction according to
operation mode.
Turbo wind, high, med, low, breeze.
Restarting is for approx. 3 minutes..
Prevent the water being frozen on evaporator by sensing
the evaporator pipe temperature in cooling mode
Room temperature sensor.
Pipe temperature sensor.
Indoor unit
Operation by remote controller
Sensing by room temperature
Room temperature control
Anti-freezing control in cooling
Time Delay Safety control
Indoor fan speed control
Two-direction air vane
Sleep mode auto control
Independent dehumidification
Air flow Direction control
Auto mode
Temp. Compensation
Flexible wiring connection
Auto defrost
Anti-cold function
Self-diag. function
Auto-restart function
Work voltage (160V-253V)
Ionizer (Optional)
Prevent the cold wind at the
beginning of unit start.
4
It protects the valves and prevents water from dripping.
The unit has 3 mins delay between continuously ON/OFF operations.
Outdoor unit
Power relay control
The hydrophilic fin can improve the heating efficiency at operation mode.
Hydrophilic aluminum fin
It is only operated in the heating operation mode except defrosting operation.
Anti-rust cabinet
Valve protection cover
4 way valve control
Made from electrolytic zinc steel sheet and anti-rust coated components.
Low noise air flow system
Bird tail propeller fan makes the outdoor unit run more quietly.
Discharge pipe temperature protect
Driving heating at -10℃
5
3. Dimension
3.1 Indoor Unit
3.2 Outdoor Unit
Dimension(mm)
Mode
W H D
L1
L2
38LUVH055N
845
695
335
560
360
38LUVH065N
38LUVH075N
895
860
333
590
355
Dimension
Mode
W H D
42LUVH055N
42LUVH065N
1080
330
228
42LUVH075N
1250
325
230
6
4. Refrigerant cycle diagram
7
5. Wiring diagram
5.1 Indoor Unit
42LUVH055N 42LUVH065N
42LUVH075N
8
5.2 Outdoor Unit
38LUVH055N 38LUVH065N
38LUVH075N
9
6. Installation details
6.1 Wrench torque sheet for installation
Outside diameter
Torque
mm
inch
Kgf.m
Ф9.52
3/8
3.5
Ф16.0
5/8
8.0
6.2 Connecting the cables
The power cord of connect should be selected according to the following specifications sheet.
Grade
Unit
21K
24K
28K
mm2
2.5
2.5
2.5
10
6.3 Pipe length and the elevation
Capacity
Btu/h
Pipe size
Standard
length
(m)
Min.
length
(m)
Max.
Elevation
B (m)
Max.
Length
A (m)
Additional
refrigerant
(g/m)
Gas
Liquid
21K/24K/28K
5/8’’ (Ф16.0)
3/8’’ (Ф9.52)
5 3 10
25
40
Caution:
Oil Traps: oil traps must be fitted to vertical suction risers where outdoor unit is above indoor unit. Fit a trap at the bottom
of the vertical rise and then at 5m (maximum) intervals.
If the outdoor unit is installed below the indoor unit (fig 1) – no trap is required in such installation.
If the units are installed at the same level – no trap is required in such installation.
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