Carrier 42QCL012733, 38QCL018R33, 42 KCL012733, 38 KCL018733, 38QCL012733 Service Manual
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Cover
Service Manual
AIR CONDITIONER
Hi-Wall Type
42/38 KCL018R33
42/38QCL018R33
Content
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
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Content
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
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Service manual
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
Ø Installation
l Do not use a defective or underrated circuit
breaker. Use this appliance on a dedicated circuit.
l There is risk of fire or electric shock.
l For electrical work, contact the dealer, seller, a
qualified electrician, or an Authorized service
center.
l Do not disassemble or repair the product, there is
risk of fire or electric shock.
l Always ground the product.
l There is risk of fire or electric shock.
l Install the panel and the cover of control box
securely.
l There is risk of fire of electric shock.
l Always install a dedicated circuit and breaker.
l Improper wiring or installation may cause fore or
electric shock.
l Use the correctly rated breaker of fuse.
l There is risk of fire or electric shock.
l Do not modify or extend the power cable.
l There is risk of fire or electric shock.
l Do not install, remove, or reinstall the unit by
yourself (customer).
l There is risk of fire, electric shock, explosion, or
injury.
l Be caution when unpacking and installing the
product.
l Sharp edges could cause injury, be especially
careful of the case edges and the fins on the
condenser and evaporator.
l For installation, always contact the dealer or an
Authorized service center.
l There is risk of fire, electric shock, explosion, or
injury.
l Do not install the product on a defective installation
stand.
l It may cause injury, accident, or damage to the
product.
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l Be sure the installation area does not deteriorate
with age.
l If the base collapses, the air conditioner could fall
with it, causing property damage, product failure,
and personal injury.
l Do not let the air conditioner run for a long time
when the humidity is very high and a door or a
windows is left open.
l Moisture may condense and wet or damage
furniture.
l Take care to ensure that power cable could not be
pulled out or damaged during operation.
l There is risk of fire or electric shock.
l Do not place anything on the power cable.
l There is risk of fire or electric shock.
l Do not plug or unplug the power supply plug during
operation.
l There is risk of fire or electric shock.
l Do not touch (operation) the product with wet
hands.
l There is risk of fire or electric shock.
l Do not place a heater or other appliance near the
power cable.
l There is risk of fire and electric shock.
l Do not allow water to run into electric parts.
l It may cause fire, failure of the product, or electric
shock.
l Do not store or use flammable gas or combustible
near the product.
l There is risk of fire or failure of product.
l Do not use the product in a tightly closed space for
a long time.
l Oxygen deficiency could occur.
l When flammable gas leaks, turn off the gas and
open a window for ventilation before turn the
product on.
l Do not use the telephone or turn switches on or off.
Service manual
l There is risk of explosion or fire.
l If strange sounds, or small or smoke comes from
product. Turn the breaker off or disconnect the
power supply cable.
l There is risk of electric shock or fire.
l Stop operation and close the window in storm or
hurricane. If possible, remove the product from the
window before the hurricane arrives.
l There is risk of property damage, failure of product,
or electric shock.
l Do not open the inlet grill of the product during
operation. (Do not touch the electrostatic filter, if
the unit is so equipped.)
l There is risk of physical injury, electric shock, or
product failure.
l When the product is soaked (flooded or
submerged), contact an Authorized service center.
l There is risk of fire or electric shock.
l Be caution that water could not enter the product.
l There is risk of fire, electric shock, or product
damage.
l Ventilate the product from time to time when
operating it together with a stove, etc.
l There is risk of fire or electric shock.
l Turn the main power off when cleaning or
maintaining the product.
l There is risk of electric shock.
l When the product is not be used for a long time,
disconnect the power supply plug or turn off the
breaker.
l There is risk of product damage or failure, or
unintended operation.
l Take care to ensure that nobody could step on or
fall onto the outdoor unit.
l This could result in personal injury and product
damage.
Ø CAUTION
l Always check for gas (refrigerant) leakage after
installation or repair of product.
l Low refrigerant levels may cause failure of product.
l Install the drain hose to ensure that water is
drained away properly.
l A bad connection may cause water leakage.
l Keep level even when installing the product.
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l To avoid vibration of water leakage.
l Do not install the product where the noise or hot air
from the outdoor unit could damage the
neighborhoods.
l It may cause a problem for your neighbors.
l Use two or more people to lift and transport the
product.
l Avoid personal injury.
l Do not install the product where it will be exposed
to sea wind (salt spray) directly.
l It may cause corrosion on the product. Corrosion,
particularly on the condenser and evaporator fins,
could cause product malfunction or inefficient
operation.
Service manual
Ø Operational
l Do not expose the skin directly to cool air for long
periods of time. (Do not sit in the draft).
l This could harm to your health.
l 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.
l There is risk of damage or loss of property.
l Do not block the inlet or outlet of air flow.
l It may cause product failure.
l Use a soft cloth to clean. Do not use harsh
detergents, solvents, etc.
l There is risk of fire, electric shock, or damage to
the plastic parts of the product.
l Do not touch the metal parts of the product when
removing the air filter. They are very sharp.
l There is risk of personal injury.
l Do not step on pr put anything on the product.
(outdoor units)
l There is risk of personal injury and failure of
product.
l Always insert the filter securely. Clean the filter
every two weeks or more often if necessary.
l A dirty filter reduces the efficiency of the air
conditioner and could cause product malfunction or
damage.
l Do not insert hands or other object through air inlet
or outlet while the product is operated.
l There are sharp and moving parts that could cause
personal injury.
l Do not drink the water drained from the product.
l It is not sanitary could cause serious health issues.
l Use a firm stool or ladder when cleaning or
maintaining the product.
l Be careful and avoid personal injury.
l 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.
l There is risk of fire or explosion.
l Do not recharge or disassemble the batteries. Do
not dispose of batteries in a fire.
l They may burn of explode.
l 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.
l The chemical in batteries could cause burns or
other health hazards.
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2.Function
Indoor unit
Operation ON/OFF by remote controller
Indoor fan is delayed for 5 sec at the starting.
Service manual
Sensing by room temperature
Room temperature sensor.
Pipe temperature sensor.
Room temperature control
Maintain the room temperature in accordance with the setting temperature.
Starting temperature control
Time Delay Safety control
Restarting is for approx. 3
minutes..
Indoor fan speed control
high, med, low, breeze.
Operation indication Lamps (VLED)
Light up in the VLED for each operation mode.
Two-direction air vane
The unit will decide the louver direction according to operation mode.
Sleep mode auto control
The fan is turn to low speed (cooling/heating).
The unit will be turn off at the seventh hour.
Independent dehumidification
The function is usually used in rainy days in
springtime or damp areas.
Self-diag. function
The function will be
operate in any operation
Air flow Direction control
Turbo mode
Anti-cold function
Prevent the cold wind at
the beginning of unit start.
Defrost mode
Auto-restart function
The louver can be set at the desired position or swing up and
down automatically
Flexible wiring connection
Auto mode
The unit can be change by the room temperature.
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Easy clean panel
Outdoor unit
The unit has 3 mins delay between continuously ON/OFF operations.
Low noise air flow system
The hydrophilic fin can improve the heating efficiency at operation mode.
It is only operated in the heating operation mode except defrosting operation.
Discharge pipe temperature protect
Service manual
Power relay control
Bird tail propeller fan makes the outdoor unit run more quietly.
Hydrophilic aluminum fin
4 way valve control
Anti-rust cabinet
Valve protection cover
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3.Dimension
3.1 Indoor unit
Service manual
3.2 Outdoor unit
Dimension
Mode
18K 1080 330 228
W H D
Dimension
Mode
18K 845
6
W H D L1 L2 L3
695
335
540
335
615
4.Refrigerant cycle diagram
Ø Cooling only
Service manual
Ø Heat pump mode
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Service manual
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.
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6.Wiring diagram
Indoor：
42KCL018R33
Service manual
42QCL018R33
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Outdoor:
38KCL018R33
Service manual
38QCL018R33
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Service manual
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
18K
2.5
Unit
mm
2
7.3 Pipe length and the elevation
Pipe size
Capacity
Btu/h
18K 1/2’’ (φ12.7)
GAS LIQUID
1/4’’ (φ6.35)
Standard
length
(m)
Max.
Elevation
B (m)
Max.
Pipe
length
A (m)
5 8 15 30
Additional
refrigerant
(g/m)
In case that
more than
Caution:
Capacity is base on standard length and maximum allowance length is base of reliability.
Oil trap should be install per 5-7 meters.
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Service manual
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.
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7.5 Pumping down (Re-installation)
Service manual
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.
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7.6 Re-air purging (Re-installation)
Service manual
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.
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Service manual
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.
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7.8 Evacuation
Service manual
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 the valve (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.
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7.9 Gas charging
Service manual
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.
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