Carrier 38 KCL018R33 User manual

Cover
Service Manual
AIR CONDITIONER
Hi-Wall Type
42/38 KCL018R33
42/38QCL018R33

Content
2
Content
1. Precaution.................................................................................................................................... 2
1.1 Safety Precaution......................................................................................................................... 2
1.2 Warning........................................................................................................................................ 2
2. Function....................................................................................................................................... 4
3. Dimension.................................................................................................................................... 6
3.1 Indoor unit.................................................................................................................................... 6
3.2 Outdoor unit................................................................................................................................. 6
4. Refrigerant cycle diagram........................................................................................................... 7
5. Operation limits............................................................................................................................ 8
5.1 Cooling operation........................................................................................................................ 8
5.2 Heating operation ........................................................................................................................ 8
6. Wiring diagram............................................................................................................................. 9
7. Installation details.......................................................................................................................11
7.1 Wrench torque sheet for installation..........................................................................................11
7.2 Connecting the cables................................................................................................................11
7.3 Pipe length and the elevation.....................................................................................................11
7.4 Air purging of the piping and indoor unit................................................................................. 12
7.5 Pumping down (Re-installation)................................................................................................ 13
7.6 Re-air purging (Re-installation)................................................................................................. 14
7.7 Balance refrigerant of the 2-way, 3-way valves........................................................................ 15
7.8 Evacuation ................................................................................................................................. 16
7.9 Gas charging.............................................................................................................................. 17
8. Electronic function .................................................................................................................... 18
8.1 Proper symbols and their meaning........................................................................................... 18
8.2 Function..................................................................................................................................... 18
8.3 Protection................................................................................................................................... 18
8.4 Fan-only mode........................................................................................................................... 19
8.5 Cooling mode............................................................................................................................. 19
8.6 Dehumidifying mode.................................................................................................................. 20
8.7 Heating mode............................................................................................................................. 21
8.8 Defrosting mode (available for heating mode)......................................................................... 22
8.9 Auto mode.................................................................................................................................. 23
8.10 Force cooling function .............................................................................................................. 23
8.11 Sleep mode ................................................................................................................................ 24
8.12 Auto restart function.................................................................................................................. 25
8.13 Turbo mode................................................................................................................................ 25
9. Model and Parameters............................................................................................................... 25
10. Troubleshooting......................................................................................................................... 26
10.1 Display board............................................................................................................................. 26
10.2 Troubleshooting......................................................................................................................... 26

Content
3
10.3 Diagnostic chart......................................................................................................................... 27
10.4 Resetting phenomenon often occurs during operation........................................................... 28
10.5 Operation lamp flashes and Timer lamp off.............................................................................. 28
10.6 Operation lamp flashes and Timer lamp on.............................................................................. 28
10.7 Operation lamp off and Timer lamp flashes.............................................................................. 29
10.8 Operation lamp on and Timer lamp flashes.............................................................................. 29
10.9 Operation lamp flashes, Timer lamp flashes ........................................................................... 29
11. Characteristic of temperature sensor....................................................................................... 30

Service manual
2
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
ØInstallation
lDo not use a defective or underrated circuit
breaker. Use this appliance on a dedicated circuit.
lThere is risk of fire or electric shock.
lFor electrical work, contact the dealer, seller, a
qualified electrician, or anAuthorized service
center.
lDo not disassemble or repair the product, there is
risk of fire or electric shock.
lAlways ground the product.
lThere is risk of fire or electric shock.
lInstall the panel and the cover of control box
securely.
lThere is risk of fire of electric shock.
lAlways install a dedicated circuit and breaker.
lImproper wiring or installation may cause fore or
electric shock.
lUse the correctly rated breaker of fuse.
lThere is risk of fire or electric shock.
lDo not modify or extend the power cable.
lThere is risk of fire or electric shock.
lDo not install, remove, or reinstall the unit by
yourself (customer).
lThere is risk of fire, electric shock, explosion, or
injury.
lBe caution when unpacking and installing the
product.
lSharp edges could cause injury, be especially
careful of the case edges and the fins on the
condenser and evaporator.
lFor installation, always contact the dealer or an
Authorized service center.
lThere is risk of fire, electric shock, explosion, or
injury.
lDo not install the product on a defective installation
stand.
lIt may cause injury, accident, or damage to the
product.
lBe sure the installation area does not deteriorate
with age.
lIf the base collapses, the air conditioner could fall
with it, causing property damage, product failure,
and personal injury.
lDo not let the air conditioner runfor a long time
when the humidity is very high and a door or a
windows is left open.
lMoisture may condense and wet or damage
furniture.
lTake care to ensure that power cable could not be
pulled out or damaged during operation.
lThere is risk of fire or electric shock.
lDo not place anything on the power cable.
lThere is risk of fire or electric shock.
lDo not plug or unplug the power supply plug during
operation.
lThere is risk of fire or electric shock.
lDo not touch (operation) the product with wet
hands.
lThere is risk of fire or electric shock.
lDo not place a heater or other appliance near the
power cable.
lThere is risk of fire and electric shock.
lDo not allow water to run into electric parts.
lIt may cause fire, failure of the product, or electric
shock.
lDo not store or use flammable gas or combustible
near the product.
lThere is risk of fire or failure of product.
lDo not use the product in a tightly closed space for
a long time.
lOxygen deficiency could occur.
lWhen flammable gas leaks, turn off the gas and
open a window for ventilation before turn the
product on.
lDo not use the telephone or turn switches on or off.

Service manual
2
lThere is risk of explosion or fire.
lIf strange sounds, or small or smoke comes from
product. Turn the breaker off or disconnect the
power supply cable.
lThere is risk of electric shock or fire.
lStop operation and close the window in storm or
hurricane. If possible, remove the product from the
window before the hurricane arrives.
lThere is risk of property damage, failure of product,
or electric shock.
lDo not open the inlet grill of the product during
operation. (Do not touch the electrostatic filter, if
the unit is so equipped.)
lThere is risk of physical injury, electric shock, or
product failure.
lWhen the product is soaked (flooded or
submerged), contact an Authorized service center.
lThere is risk of fire or electric shock.
lBe caution that water could not enter the product.
lThere is risk of fire, electric shock, or product
damage.
lVentilate the product from time to time when
operating it together with a stove, etc.
lThere is risk of fire or electric shock.
lTurn the main power off when cleaning or
maintaining the product.
lThere is risk of electric shock.
lWhen the product is not be used for a long time,
disconnect the power supply plug or turn off the
breaker.
lThere is risk of product damage or failure, or
unintended operation.
lTake care to ensure that nobody could step on or
fall onto the outdoor unit.
lThis could result in personal injury and product
damage.
ØCAUTION
lAlways check for gas (refrigerant) leakage after
installation or repair of product.
lLow refrigerant levels may cause failure of product.
lInstall the drain hose to ensure that water is
drained away properly.
lA bad connection may cause water leakage.
lKeep level even when installing the product.
lTo avoid vibration of water leakage.
lDo not install the product where the noise or hot air
from the outdoor unit could damage the
neighborhoods.
lIt may cause a problem for your neighbors.
lUse two or more people to lift and transport the
product.
lAvoid personal injury.
lDo not install the product where it will be exposed
to sea wind (salt spray) directly.
lIt may cause corrosion on the product. Corrosion,
particularly on the condenser and evaporator fins,
could cause product malfunction or inefficient
operation.

Service manual
3
ØOperational
lDo not expose the skin directly to cool air for long
periods of time. (Do not sit in the draft).
lThis could harm to your health.
lDo 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.
lThere is risk of damage or loss of property.
lDo not block the inlet or outlet of air flow.
lIt may cause product failure.
lUse a soft cloth to clean. Do not use harsh
detergents, solvents, etc.
lThere is risk of fire, electric shock, or damage to
the plastic parts of the product.
lDo not touch the metal parts of the product when
removing the air filter. They are very sharp.
lThere is risk of personal injury.
lDo not step on pr put anything on the product.
(outdoor units)
lThere is risk of personal injury and failure of
product.
lAlways insert the filter securely. Clean the filter
every two weeks or more often if necessary.
lA dirty filter reduces the efficiency of the air
conditioner and could cause product malfunction or
damage.
lDo not insert hands or other object through air inlet
or outlet while the product is operated.
lThere are sharp and moving parts that could cause
personal injury.
lDo not drink the water drained from the product.
lIt is not sanitary could cause serious health issues.
lUse a firm stool or ladder when cleaning or
maintaining the product.
lBe careful and avoid personal injury.
lReplace 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.
lThere is risk of fire or explosion.
lDo not recharge or disassemble the batteries. Do
not dispose of batteries in a fire.
lThey may burn of explode.
lIf 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.
lThe chemical in batteries could cause burns or
other health hazards.

Service manual
4
2.Function
The function will be
operate in any operation
mode.
Indoor unit
Operation ON/OFF by remote controller
Room temperature sensor.
Pipe temperature sensor.
Sensing by room temperature
Maintain the room temperature in accordance with the setting temperature.
Room temperature control
Indoor fan is delayed for 5 sec at the starting.
Starting temperature control
Restarting is for approx. 3
minutes..
Time Delay Safety control
high, med, low, breeze.
Indoor fan speed control
Light up in the VLED for each operation mode.
The unit will decide the louver direction according to operation mode.
Two-direction air vane
The fan is turn to low speed (cooling/heating).
The unit will be turn off at the seventh hour.
Sleep mode auto control
The function is usually used in rainy days in
springtime or damp areas.
Independent dehumidification
Operation indication Lamps (VLED)
The louver can be set at the desired position or swing up and
down automatically
Air flow Direction control
The unit can be change by the room temperature.
Auto mode
Easy clean panel
Flexible wiring connection
Defrost mode
Prevent the cold wind at
the beginning of unit start.
Anti-cold function
Auto-restart function
Self-diag. function
Turbo mode

Service manual
5
The unit has 3 mins delay between continuously ON/OFF operations.
Outdoor unit
Power relay control
Bird tail propeller fan makes the outdoor unit run more quietly.
Low noise air flow system
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.
Discharge pipe temperature protect
Anti-rust cabinet
Valve protection cover
4 way valve control

Service manual
6
3.Dimension
3.1 Indoor unit
3.2 Outdoor unit
Dimension
Mode W H D
18K 1080 330 228
Dimension
Mode W H D L1 L2 L3
18K 845 695 335 540 335 615

Service manual
7
4.Refrigerant cycle diagram
ØCooling only
ØHeat pump mode

Service manual
8
5.Operation limits
5.1 Cooling operation
Outdoor unit air temp.℃DB
Indoor air temp. ℃DB
Note: The chart is the result from the continuous operation under constant air temperature conditions.
However, excludes the initial pull-down stage.
5.2 Heating operation
Indoor air temp. ℃DB
Outdoor unit air temp.℃DB
Note: The chart is the result from the continuous operation under constant air temperature conditions.
However, excludes the initial pull-down stage.

Service manual
9
6.Wiring diagram
Indoor：
42KCL018R33
42QCL018R33

Service manual
10
Outdoor:
38KCL018R33
38QCL018R33

Service manual
11
7.Installation details
7.1 Wrench torque sheet for installation
Outside diameter Torque
mm inch Kg.m
φ6.35 1/4 1.8
φ12.7 1/2 5.5
7.2 Connecting the cables
The power cord of connect should be selected according to the following specifications sheet.
Grade
Unit 18K
mm2 2.5
7.3 Pipe length and the elevation
Pipe size
Capacity
Btu/h GAS LIQUID
Standard
length
(m)
Max.
Elevation
B (m)
Max.
Pipe
length
A (m)
Additional
refrigerant
(g/m)
18K 1/2’’ (φ12.7) 1/4’’ (φ6.35) 5 8 15 30
Caution:
Capacity is base on standard length and maximum allowance length is base of reliability.
Oil trap should be install per 5-7 meters.
In case that
more than
5m.

Service manual
12
7.4 Air purging of the piping and indoor unit
Required tools:
Hexagonal wrench; adjustable wrench; torque wrenches, wrench to hold the joints and gas leak detector.
Note:
The air in the indoor unit and in the piping must be purged. If air remains in the refrigeration piping, it will
affect the compressor, reduce the cooling capacity, and could lead to a malfunction of unit.
Be sure, using a torque wrench to tighten the service port cap (after using the service port), so that it
prevents the gas leakage from the refrigeration cycle.
Procedure
Recheck the piping connections.
Open the valve stem of the 2-way valve
counterclockwise approximately 90’, wait 10
seconds, and then set it to closed position.
Be sure to use a hexagonal wrench to operate the
valve stem
Check for gas leakage.
Check the flare connection for gas leakage
Purge the air from the system.
Set the 2-way valve to the open position and
remove the cap from the 3-way valve’s service
port.
Using the hexagonal wrench to press the valve
core pin, discharge for three seconds and then
wait for one minute.
Use torque wrench to tighten the service port cap
to a torque of 1.8 kg.m. (18n.m)
Set the 3-way valve to the opened position.
Mounted the valve stem nuts to the 2-way and
3-way valves.
Check for gas leakage.
At this time, especially check for gas leakage from
the 2-way and 3-way stem nuts, and from the
service port.
Caution:
If gas leakage is discovered in step (3) above,
take the following measures.
If the leaks stop when the piping connections are
tightened further, continue working from step (4).
If the gas leaks do not stop when the connections
are retightened, repair the location of the leak,
discharge all of the gas through the service port,
and then recharge with the specified amount of
gas from a gas cylinder.

Service manual
13
7.5 Pumping down (Re-installation)
Procedure
Confirm that both the 2-way and 3-way valves are set to the opened position.
Remove the valve stem caps and confirm that the valve stems are in the opened position.
Be sure to use a hexagonal wrench to operate the valve stems.
Operate the unit for 10 to 15 minutes.
Stop operation and wait for 3 minutes, then connect the charge set to the service port of the 3-way valve.
Connect the charge hose with the push pin to the gas service port.
Air purging of the charge hose.
Open the low-pressure valve on the charge set slightly to purge air from the charge hose.
Set the 2-way valve to the close position.
Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0.1MPa.
Immediately set the 3-way valve to the closed position.
Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa.
Disconnect the charge set, and amount the 2-way and 3-way valve’s stem nuts and service port caps.
Use a torque wrench to tighten the service port cap to a torque of 1.8 kg.m.
Be sure to check for gas leakage.

Service manual
14
7.6 Re-air purging (Re-installation)
Procedure:
Confirm that both the 2-way and 3-way valves are set to the closed position.
Connect the charge set and a charging cylinder to the service port of the 3-way valve.
Leave the valve on the charging cylinder closed.
Air purging.
Open the valves on the charging cylinder and the charge set. Purge the air by loosening the flare nut on the
2-way valve approximately 45’ for 3 seconds then closing it for 1 minutes; repeat 3 times.
After purging the air, use a torque wrench to tighten the flare nut to on the 2-way valve.
Check the gas leakage.
Check the flare connections for gas leakage.
Discharge the refrigerant.
Close the valve on the charging cylinder and discharge the refrigerant until the gauge indicate 0.3 to 0.5 Mpa.
Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position.
Be sure to use a hexagonal wrench to operate the valve stems.
Mount the valve stems nuts and the service port cap.
Be sure to use a torque wrench to tighten the service port cap to a torque 18N.m.
Be sure to check the gas leakage.

Service manual
15
7.7 Balance refrigerant of the 2-way, 3-way valves
Procedure:
Confirm that both the 2-way and 3-way valves are set to the open position.
Connect the charge set to the 3-way valve’s service port.
Leave the valve on the charge set closed.
Connect the charge hose with the push pin to the service port.
Open the valves (Low side) on the charge set and discharge the refrigerant until the gauge indicates 0.05 to 0.1
Mpa.
If there is no air in the refrigeration cycle [the pressure when the air conditioner is not running is higher than
0.1Mpa, discharge the refrigerant until the gauge indicates 0.05 to 0.1 Mpa. If this is the case, it will not be
necessary to apply a evacuation.
Discharge the refrigeration gradually; if it is discharged too suddenly, the refrigeration oil sill be discharged.

Service manual
16
7.8 Evacuation
Procedure:
Connect the vacuum pump to the charge set’s centre hose.
Evacuation for approximately one hour.
Confirm that the gauge needle has moved toward -0.1 Mpa (-76 cmHg) [vacuum of 4 mmHg or less].
Close thevalve (Low side) on the charge set, turn off the vacuum pump, and confirm that the gauge needle does
not move (approximately 5 minutes after turning off the vacuum pump).
Disconnect the charge hose from the vacuum pump.
Vacuum pump oil, if the vacuum pump oil becomes dirty or depleted, replenish as needle.

Service manual
17
7.9 Gas charging
Procedure:
1.Connect the charge hose to the charging cylinder.
§Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of
the cylinder.
2.Purge the air from the charge hose.
§Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air
(be careful of the liquid refrigerant).
3.Open the valves (Low side) on the charge set and charge the system with liquid refrigerant.
§If the system cannot be charge with the specified amount of refrigerant, if can be charged with a little at a
time (approximately 150g each time0 while operating the air conditioner in the cooling cycle; however, one time
is not sufficient, wait approximately 1 minute and then repeat the procedure.(pumping down-pin).
4.Immediately disconnect the charge hose from the 3-way valve’s service port.
§Stopping partway will allow the refrigerant to be discharged.
§If the system has been charged with liquid refrigerant while operating the air conditioner, turn off the air
conditioner before disconnecting the hose.
5.Mounted the valve stem caps and the service port
§Use torque wrench to tighten the service port cap to a torque of 18N.m.
§Be sure to check for gas leakage.