11. HOW TO DIAGNOSE THE TROUBLE ........................................ 93
12. HOW TO REPLACE THE MAIN PARTS ................................... 121
13.
EXPLODED VIEWS AND PARTS LIST.................................... 107
Page 3
1. SAFETY PRECAUTIONS
FILE NO. SVM-15036
- 3 -
The important contents concerned to the safety are described on the product itself and on this Service Manual.
Please read this Service Manual after understanding the described items thoroughly in the following contents
(Indications/Illustrated marks), and keep them.
[Explanation of indications]
Indication
DANGER
WARNING
CAUTION
∗ Property damage : Enlarged damage concerned to property, furniture, and domestic animal/pet
Indicates contents assumed that an imminent danger causing a death or serious injury of
the repair engineers and the third parties when an incorrect work has been executed.
Indicates possibilities assumed that a danger causing a death or serious injury of the
repair engineers, the third parties, and the users due to troubles of the product after work
when an incorrect work has been executed.
Indicates contents assumed that an injury or property damage (∗) may be caused on the
repair engineers, the third parties, and the users due to troubles of the product after work
when an incorrect work has been executed.
Explanation
[Explanation of illustrated marks]
MarkExplanation
Indicates prohibited items (Forbidden items to do)
The sentences near an illustrated mark describe the concrete prohibited contents.
Indicates mandatory items (Compulsory items to do)
The sentences near an illustrated mark describe the concrete mandatory contents.
Indicates cautions (including danger/warning)
The sentences or illustration near or in an illustrated mark describe the concrete cautious contents.
For general public use
Power supply cord of outdoor unit shall be more than 2.5 mm² (H07RN-F or 60245IEC66) polychloroprene
sheathed flexible cord.
• Read this “SAFETY PRECAUTIONS” carefully before servicing.
• The precautions described below include the important items regarding safety. Observe them without fail.
• After the servicing work, perform a trial operation to check for any problem.
• Turn off the main power supply switch (or breaker) before the unit maintenance.
CAUTION
New Refrigerant Air Conditioner Installation
• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT
DESTROY OZONE LAYER.
R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because
the working pressure of R410A refrigerant is approx. 1.6 times of refrigerant R22. Accompanied with the
adoption of the new refrigerant, the refrigeration machine oil has also been changed. Therefore, during
installation work, be sure that water, dust, former refrigerant, or refrigeration machine oil does not enter into
the new type refrigerant R410A air conditioner circuit.
To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging port
on main unit and installation tools are different from those used for the conventional refrigerant units.
Accordingly, special tools are required for the new refrigerant (R410A) units. For connecting pipes, use new
and clean piping materials with high pressure fittings made for R410A only, so that water and/or dust does
not enter. Moreover, do not use the existing piping because there are some problems with pressure fittings
and possible impurities in existing piping.
Page 4
CAUTION
FILE NO. SVM-15036
- 4 -
TO DISCONNECT THE APPLIANCE FROM THE MAIN POWER SUPPLY
A switch or circuit breaker that can disconnect all poles must be included in the fixed wiring.
Be sure to use an approved circuit breaker or switch.
DANGER
• The manufacturer shall not assume any liability for the damage caused by not observing the
description of this manual.
• Ask an authorized dealer or qualified installation professional to install/maintain the air conditioner.
INAPPROPRIATE SERVICING MAY RESULT IN WATER LEAKAGE, ELECTRIC SHOCK OR FIRE.
• TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL WORK.
MAKE SURE ALL POWER SWITCHES ARE OFF. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.
DANGER: HIGH VOLTAGE
The high voltage circuit is incorporated. Be careful to do the check service, as the electric shock may be
caused in case of touching parts on the P.C. board by hand.
• CORRECTLY CONNECT THE CONNECTING CABLE. IF THE CONNECTING CABLE IS INCORRECTLY CONNECTED, ELECTRIC PARTS MAY BE DAMAGED.
• CHECK THAT THE EARTH WIRE IS NOT BROKEN OR DISCONNECTED BEFORE SERVICE AND INSTALLATION. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.
• DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.
• TO PREVENT THE INDOOR UNIT FROM OVERHEATING AND CAUSING A FIRE HAZARD, PLACE THE UNIT
WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEAT RESISTORS, FURNACE, STOVES, ETC.
• WHEN MOVING THE AIR-CONDITIONER FOR INSTALLATION IN ANOTHER PLACE, BE VERY CAREFUL NOT
TO ALLOW THE SPECIFIED REFRIGERANT (R410A) TO BECOME MIXED WITH ANY OTHER GASEOUS
BODY INTO THE REFRIGERATION CIRCUIT. IF AIR OR ANY OTHER GAS IS MIXED IN THE REFRIGERANT,
THE GAS PRESSURE IN THE REFRIGERATION CIRCUIT WILL BECOME ABNORMALLY HIGH AND IT MAY
RESULT IN THE PIPE BURSTING AND POSSIBLE PERSONNEL INJURIES.
• IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE SERVICE WORK AND
THE INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM. IF THE REFRIGERANT GAS IS
HEATED, SUCH AS BY FIRE, GENERATION OF POISONOUS GAS MAY RESULT.
WARNING
• Do not use any refrigerant different from the one specified for complement or replacement.
Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which may result in a failure or
explosion of the product or an injury to your body.
• Never modify this unit by removing any of the safety guards or bypass any of the safety interlock switches.
• Do not install in a place which cannot bear the weight of the unit.
Personal injury and property damage can result if the unit falls.
• After the installation work, confirm that refrigerant gas does not leak.
If refrigerant gas leaks into the room and flows near a fire source such as a cooking range, noxious gas may generate.
• The electrical work must be performed by a qualified electrician in accordance with the Installation
Manual. Make sure the air conditioner uses an exclusive circuit.
An insufficient circuit capacity or inappropriate installation may cause fire.
• When wiring, use the specified cables and connect the terminals securely to prevent external forces
applied to the cable from affecting the terminals.
• Be sure to provide grounding.
Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone cables.
• Conform to the regulations of the local electric company when wiring the power supply.
Inappropriate grounding may cause electric shock.
Page 5
CAUTION
FILE NO. SVM-15036
- 5 -
• Exposure of unit to water or other moisture before installation may result in an electrical short.
Do not store in a wet basement or expose to rain or water.
• Do not install in a place that can increase the vibration of the unit. Do not install in a place that can amplify
the noise level of the unit or where noise or discharged air might disturb neighbors.
• To avoid personal injury, be careful when handling parts with sharp edges.
• Perform the specified installation work to guard against an earthquake.
If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.
2. SPECIFICATIONS
The indoor and outdoor units that can be used in combination are shown in the tables below.
Table of models that can be used in combination
Type Outdoor unit Combinations of indoor unit models that can be connected
Heat pump
NOTES
A 1-room connection is not an option for the indoor units (you cannot connect only one indoor unit).
Be sure to connect indoor units in two or more.
RAS-5M34S3AV-E, -A, -TR
Refer to page 8 to 25
2-1. Specifications
<Heat Pump Models>
RAS-5M34S3AV-E, -A, -TR
Unit model
Cooling Capacity(kW)
Cooling Capacity range(kW)
Heating Capacity(kW)
Heating Capacity range(kW)
Power supply
Electric
characteristics
COP
Operating noise
Outdoor unitMotor output(W)
Piping connectionD unit liquid side/gas side
Wiring connection
Usable temperature range
Accessory
OutdoorRAS-
Operation mode
Total
(Cooling/Heating)
Outdoor
Full indoor units operating
(Cooling/Heating)
DimensionWidth(mm)
Net weight(kg)
CompressorType
Fan motor output(W)
Air flow rate(m³/h)
Type
Outdoor unitB unit liquid side/gas side
Maximum length (per unit)(m)
Maximum length (total)(m)
Maximum chargeless length(m)
Maximum height difference(m)
Name of refirigerant
Weight(kg)
Power supply / interconnection
Outdoor(Cooling/Heating)(°C)
Outdoor unit
Unit modelRAS-
Installation manual
Running current(A)
Power consumption(W)
Power factor(%)
Starting current(A)
Height(mm)
Depth(mm)
Model
A unit liquid side/gas side
C unit liquid side/gas side
E unit liquid side/gas side
RAS-
220-240V 1Ph 50Hz / 220V 1Ph 60Hz
CoolingHeating
14.26 / 13.65 / 13.07
2980
9595
Twin rotary type with DC-inverter variable speed control
3 Wires : includes earth / 4 Wires : includes earth
• For performance when each indoor unit is combined with other unit, refer to the separate table.
• The specifications may be subject to change without notice for purpose of improvement.
This air conditioner adopts the new refrigerant HFC
(R410A) which does not damage the ozone layer.
The working pressure of the new refrigerant R410A
is 1.6 times higher than conventional refrigerant
(R22). The refrigerating oil is also changed in
accordance with change of refrigerant, so be careful
that water, dust, and existing refrigerant or refrigerating oil are not entered in the refrigerant cycle of
the air conditioner using the new refrigerant during
installation work or servicing time.
The next section describes the precautions for air
conditioner using the new refrigerant.
Conforming to contents of the next section together
with the general cautions included in this manual,
perform the correct and safe work.
3-1. Safety During Installation/Servicing
As R410A’s pressure is about 1.6 times higher than
that of R22, improper installation/servicing may
cause a serious trouble. By using tools and materials exclusive for R410A, it is necessary to carry out
installation/servicing safely while taking the following precautions into consideration.
1. Never use refrigerant other than R410A in an air
conditioner which is designed to operate with
R410A. If other refrigerant than R410A is mixed,
pressure in the refrigeration cycle becomes
abnormally high, and it may cause personal
injury, etc. by a rupture.
2. Confirm the used refrigerant name, and use
tools and materials exclusive for the refrigerant
R410A. The refrigerant name R410A is indicated
on the visible place of the outdoor unit of the air
conditioner using R410A as refrigerant.
To prevent mischarging, the diameter of the
service port differs from that of R22.
3. If a refrigeration gas leakage occurs during
installation/servicing, be sure to ventilate fully.
If the refrigerant gas comes into contact with fire,
a poisonous gas may occur.
4. When installing or removing an air conditioner,
do not allow air or moisture to remain in the
refrigeration cycle.
Otherwise, pressure in the refrigeration cycle
may become abnormally high so that a rupture
or personal injury may be caused.
5. After completion of installation work, check to
make sure that there is no refrigeration gas
leakage. If the refrigerant gas leaks into the
room, coming into contact with fire in the fandriven heater, space heater, etc., a poisonous
gas may occur.
6. When an air conditioning system charged with a
large volume of refrigerant is installed in a small
room, it is necessary to exercise care so that,
even when refrigerant leaks, its concentration
does not exceed the marginal level.
If the refrigerant gas leakage occurs and its
concentration exceeds the marginal level, an
oxygen starvation accident may result.
7. Be sure to carry out installation or removal
according to the installation manual.
Improper installation may cause refrigeration
trouble, water leakage, electric shock, fire, etc.
8. Unauthorized modifications to the air conditioner
may be dangerous.
If a breakdown occurs please call a qualified air
conditioner technician or electrician.
Improper repair may result in water leakage,
electric shock and fire, etc.
3-2. Refrigerant Piping Installation
3-2-1. Piping Materials and Joints Used
For the refrigerant piping installation, copper pipes
and joints are mainly used. Copper pipes and joints
suitable for the refrigerant must be chosen and
installed. Furthermore, it is necessary to use clean
copper pipes and joints whose interior surfaces are
less affected by contaminants.
1. Copper Pipes
It is necessary to use seamless copper pipes
which are made of either copper or copper alloy
and it is desirable that the amount of residual oil
is less than 40 mg/10 m.
Do not use copper pipes having a collapsed,
deformed or discolored portion (especially on the
interior surface).
Otherwise, the expansion valve or capillary tube
may become blocked with contaminants.
As an air conditioner using R410A incurs pressure higher than when using R22, it is necessary
to choose adequate materials.
Thicknesses of copper pipes used with R410A
are as shown in Table 3-2-1.
Never use copper pipes thinner than 0.8 mm
even when it is available on the market.
Page 28
Table 3-2-1 Thicknesses of annealed copper pipes
FILE NO. SVM-15036
- 28 -
Thickness (mm)
Nominal diameter
1/4
3/8
1/2
5/8
Outer diameter (mm)
6.35
9.52
12.70
15.88
R410AR22
0.800.80
0.800.80
0.800.80
1.001.00
2. Joints
For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants.
a) Flare Joints
Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds
20 mm. In such a case, socket joints can be used.
Sizes of flare pipe ends, flare joint ends and flare nuts are as shown in Tables 3-2-3 to 3-2-6 below.
b) Socket Joints
Socket joints are such that they are brazed for connections, and used mainly for thick pipings whose
diameter is larger than 20 mm.
Thicknesses of socket joints are as shown in Table 3-2-2.
Table 3-2-2 Minimum thicknesses of socket joints
Nominal diameter
1/4
3/8
1/2
5/8
Reference outer diameter of
copper pipe jointed (mm)
6.35
9.52
12.70
15.88
Minimum joint thickness
(mm)
0.50
0.60
0.70
0.80
3-2-2. Processing of Piping Materials
When performing the refrigerant piping installation, care should be taken to ensure that water or dust does not
enter the pipe interior, that no other oil than lubricating oils used in the installed air-water heat pump is used,
and that refrigerant does not leak.
When using lubricating oils in the piping processing, use such lubricating oils whose water content has been
removed. When stored, be sure to seal the container with an airtight cap or any other cover.
1. Flare processing procedures and precautions
a) Cutting the Pipe
By means of a pipe cutter, slowly cut the pipe so that it is not deformed.
b) Removing Burrs and Chips
If the flared section has chips or burrs, refrigerant leakage may occur.
Carefully remove all burrs and clean the cut surface before installation.
c) Insertion of Flare Nut
Page 29
d) Flare Processing
FILE NO. SVM-15036
- 29 -
Make certain that a clamp bar and copper
pipe have been cleaned.
By means of the clamp bar, perform the flare
processing correctly.
Use either a flare tool for R410A or conventional flare tool.
Flare processing dimensions differ according
to the type of flare tool.
When using a conventional flare tool, be sure
to secure “dimension A” by using a gauge for
size adjustment.
Table 3-2-3 Dimensions related to flare processing for R410A
ØD
A
Fig. 3-2-1 Flare processing dimensions
Nominal
diameter
1/4
3/8
1/2
5/8
Nominal
diameter
1/4
3/8
Outer
diameter
(mm)
6.35
9.52
12.70
15.88
Table 3-2-4 Dimensions related to flare processing for R22
Outer
diameter
(mm)
6.35
9.52
Thickness
(mm)
0.8
0.8
0.8
1.0
Thickness
(mm)
0.8
0.8
Flare tool for R410A
clutch type
0 to 0.51.0 to 1.51.5 to 2.0
0 to 0.51.0 to 1.51.5 to 2.0
0 to 0.51.0 to 1.52.0 to 2.5
0 to 0.51.0 to 1.52.0 to 2.5
Flare tool for R22
clutch type
0 to 0.50.5 to 1.01.0 to 1.5
0 to 0.50.5 to 1.01.0 to 1.5
A (mm)
Conventional flare tool
Clutch type Wing nut type
A (mm)
Conventional flare tool
Clutch type Wing nut type
1/2
5/8
Nominal
diameter
1/4
3/8
1/2
5/8
12.70
15.88
Table 3-2-5 Flare and flare nut dimensions for R410A
Outer diameter
(mm)
6.35
9.52
12.70
15.88
0.8
1.0
Thickness
(mm)
0.8
0.8
0.8
1.0
0 to 0.50.5 to 1.01.5 to 2.0
0 to 0.50.5 to 1.01.5 to 2.0
Dimension (mm)
ABCD
9.19.26.513
13.213.59.720
16.016.612.923
19.019.716.025
Flare nut width
(mm)
17
22
26
29
Page 30
Table 3-2-6 Flare and flare nut dimensions for R22
FILE NO. SVM-15036
- 30 -
Nominal
diameter
1/4
3/8
1/2
5/8
3/4
Outer diameter
(mm)
6.35
9.52
12.70
15.88
19.05
45˚ to 46˚
Thickness
(mm)
0.8
0.8
0.8
1.0
1.0
BA
Dimension (mm)
ABCD
9.09.26.513
13.013.59.720
16.016.212.920
19.019.716.023
23.324.019.234
D
C
43˚ to 45˚
Flare nut width
(mm)
17
22
24
27
36
Fig. 3-2-2 Relations between flare nut and flare seal surface
2. Flare Connecting Procedures and Precautions
a) Make sure that the flare and union portions do not have any scar or dust, etc.
b) Correctly align the processed flare surface with the union axis.
c) Tighten the flare with designated torque by means of a torque wrench.
The tightening torque for R410A is the same as that for conventional R22.
Incidentally, when the torque is weak, the gas leakage may occur.
When it is strong, the flare nut may crack and may be made non-removable. When choosing the
tightening torque, comply with values designated by manufacturers. Table 3-2-7 shows reference values.
NOTE :
When applying oil to the flare surface, be sure to use oil designated by the manufacturer.
If any other oil is used, the lubricating oils may deteriorate and cause the compressor to burn out.
Table 3-2-7 Tightening torque of flare for R410A [Reference values]
Nominal
diameter
Outer diameter
(mm)
Tightening torque
N•m (kgf•cm)
Tightening torque of torque
wrenches available on the market
N•m (kgf•cm)
1/4
3/8
1/2
5/8
6.35
9.52
12.70
15.88
14 to 18 (140 to 180)
33 to 42 (330 to 420)
50 to 62 (500 to 620)
63 to 77 (630 to 770)
16 (160), 18 (180)
42 (420)
55 (550)
65 (650)
Page 31
3-3. Tools
FILE NO. SVM-15036
- 31 -
3-3-1. Required Tools
The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R410A is
changed to prevent mixing of other refrigerant.
To reinforce the pressure-resisting strength, flare processing dimensions and opposite side dimension of flare
nut (For Ø12.7 copper pipe) of the refrigerant piping are lengthened.
The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge,
clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types.
1. Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))
2. Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)
3. Tools commonly used for R410A and for conventional refrigerant (R22)
The table below shows the tools exclusive for R410A and their interchangeability.
Tools exclusive for R410A (The following tools for R410A are required.)
Tools whose specifications are changed for R410A and their interchangeability
No.
1
Flare tool
Copper pipe gauge for
2
adjusting projection margin
Torque wrench
3
(For Ø12.7)
4
Gauge manifold
5
Charge hose
6
Vacuum pump adapter
Electronic balance for
7
refrigerant charging
8
Refrigerant cylinder
9
Leakage detector
10
Charging cylinder
Used tool
Usage
Pipe flaring
Flaring by
conventional flare tool
Connection of flare nut
Evacuating, refrigerant
charge, run check, etc.
Vacuum evacuating
Refrigerant charge
Refrigerant charge
Gas leakage check
Refrigerant charge
air-water heat pump installation
R410A
Existence ofWhether conventional
new equipment equipment can be
for R410Aused
Ye s∗ (Note 1)
Ye s∗ (Note 1)
Ye sN o
Ye sN o
Ye sN o
Ye sN o
Ye sN o
Ye sN o
(Note 2)No
Conventional air-water
heat pump installation
Whether new equipment
can be used with
conventional refrigerant
Ye s
∗ (Note 1)
No
No
Ye s
Ye s
No
Ye s
No
(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection
margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.
(Note 2) Charging cylinder for R410A is being currently developed.
In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary as
the general tools.
1. Vacuum pump7. Screwdriver (+, –)
Use vacuum pump by attaching vacuum pump adapter.8. Spanner or Monkey wrench
3. Pipe cutter10. Hexagon wrench (Opposite side 4mm)
4. Reamer11. Tape measure
5. Pipe bender12. Metal saw
6. Level vial
Also prepare the following equipments for other installation method and run check.
1. Clamp meter3. Insulation resistance tester
2. Thermometer4. Electroscope
General tools (Conventional tools can be used.)
Page 32
3-4. Recharging of Refrigerant
FILE NO. SVM-15036
- 32 -
When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the
following steps.
Recover the refrigerant, and check no refrigerant
remains in the equipment.
When the compound gauge’s pointer has indicated
–0.1 Mpa (–76 cmHg), place the handle Low in the
Connect the charge hose to packed valve service port
at the outdoor unit’s gas side.
fully closed position, and turn off the vacuum pump’s
power switch.
Connect the charge hose to the vacuum pump adapter.
Open fully both packed valves at liquid and gas sides.
Place the handle of the gauge manifold Low in the
fully opened position, and turn on the vacuum pump’s
power switch.
Then, evacuating the refrigerant in the cycle.
Keep the status as it is for 1 to 2 minutes, and ensure
that the compound gauge’s pointer does not return.
Set the refrigerant cylinder to the electronic balance,
connect the connecting hose to the cylinder and the
connecting port of the electronic balance, and charge
liquid refrigerant.
(For refrigerant charging, see the figure below.)
CAUTION
1. Never charge refrigerant exceeding the specified amount.
2. If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.
3. Do not carry out additional charging.
When additional charging is carried out if refrigerant leaks, the refrigerant composition changes in the
refrigeration cycle, that is characteristics of the air conditioner changes, refrigerant exceeding the specified
amount is charged, and working pressure in the refrigeration cycle becomes abnormally high pressure, and
may cause a rupture or personal injury.
Electronic balance for refrigerant charging
Refrigerant cylinder
(with siphon)
Opened
Check valve
Opened
Open/close
valve for charging
Closed
Opened
Service port
Fig. 3-4-1 Configuration of refrigerant charging
(Outdoor unit)(Indoor unit)
Page 33
1. Be sure to make setting so that liquid can be charged.
FILE NO. SVM-15036
- 33 -
2. When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.
It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant.
Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the
cylinder upside down if cylinder is not equipped with siphon.
[ Cylinder with siphon ][ Cylinder without siphon ]
Gauge manifold
OUTDOOR unit
Refrigerant
cylinder
Gauge manifold
OUTDOOR unit
cylinder
Refrigerant
Electronic
balance
R410A refrigerant is HFC mixed refrigerant.
Therefore, if it is charged with gas, the
composition of the charged refrigerant changes
and the characteristics of the equipment varies.
3-5. Brazing of Pipes
3-5-1. Materials for Brazing
1. Silver brazing filler
Silver brazing filler is an alloy mainly composed
of silver and copper.
It is used to join iron, copper or copper alloy,
and is relatively expensive though it excels in
solderability.
2. Phosphor bronze brazing filler
Phosphor bronze brazing filler is generally
used to join copper or copper alloy.
3. Low temperature brazing filler
Low temperature brazing filler is generally
called solder, and is an alloy of tin and lead.
Since it is weak in adhesive strength, do not
use it for refrigerant pipes.
Electronic
balance
Siphon
Fig. 3-4-2
1. Phosphor bronze brazing filler tends to react with
sulfur and produce a fragile compound water
solution, which may cause a gas leakage.
Therefore, use any other type of brazing filler at a hot
spring resort, etc., and coat the surface with a paint.
2. When performing brazing again at time of servicing,
use the same type of brazing filler.
3-5-2. Flux
1. Reason why flux is necessary
• By removing the oxide film and any foreign matter
on the metal surface, it assists the flow of brazing
filler.
• In the brazing process, it prevents the metal
surface from being oxidized.
• By reducing the brazing filler’s surface tension,
the brazing filler adheres better to the treated metal.
Page 34
2. Characteristics required for flux
FILE NO. SVM-15036
- 34 -
• Activated temperature of flux coincides with
the brazing temperature.
• Due to a wide effective temperature range, flux
is hard to carbonize.
• It is easy to remove slag after brazing.
• The corrosive action to the treated metal and
brazing filler is minimum.
• It excels in coating performance and is harmless to the human body.
As the flux works in a complicated manner as
described above, it is necessary to select an
adequate type of flux according to the type and
shape of treated metal, type of brazing filler and
brazing method, etc.
3. Types of flux
• Noncorrosive flux
Generally, it is a compound of borax and boric
acid. It is effective in case where the brazing
temperature is higher than 800°C.
• Activated flux
Most of fluxes generally used for silver brazing
are this type.
It features an increased oxide film removing
capability due to the addition of compounds
such as potassium fluoride, potassium chloride
and sodium fluoride to the borax-boric acid
compound.
4. Piping materials for brazing and used
brazing filler/flux
3-5-3. Brazing
As brazing work requires sophisticated techniques,
experiences based upon a theoretical knowledge, it
must be performed by a person qualified.
In order to prevent the oxide film from occurring in
the pipe interior during brazing, it is effective to
proceed with brazing while letting dry Nitrogen gas
(N2) flow.
Never use gas other than Nitrogen gas.
1. Brazing method to prevent oxidation
1) Attach a reducing valve and a flow-meter to
the Nitrogen gas cylinder.
2) Use a copper pipe to direct the piping material, and attach a flow-meter to the cylinder.
3) Apply a seal onto the clearance between the
piping material and inserted copper pipe for
Nitrogen in order to prevent backflow of the
Nitrogen gas.
4) When the Nitrogen gas is flowing, be sure to
keep the piping end open.
5) Adjust the flow rate of Nitrogen gas so that it
is lower than 0.05 m3/Hr or 0.02 MPa
(0.2kgf/cm2) by means of the reducing valve.
6) After performing the steps above, keep the
Nitrogen gas flowing until the pipe cools
down to a certain extent (temperature at
which pipes are touchable with hands).
7) Remove the flux completely after brazing.
Piping material
Copper - Copper
Copper - Iron
Iron - Iron
Used brazing filler
Phosphor copper
Silver
Silver
Used flux
Do not use
Paste flux
Vapor flux
1. Do not enter flux into the refrigeration cycle.
2. When chlorine contained in the flux remains
within the pipe, the lubricating oil deteriorates.
Therefore, use a flux which does not contain
chlorine.
3. When adding water to the flux, use water which
does not contain chlorine
(e.g. distilled water or ion-exchange water).
Part name
PULSE MOTOR VALVE
DISCHARGE PIPE TEMP. SENSOR
CONDENSER PIPE TEMP. SENSOR
OUTDOOR TEMP. SENSOR
SUCTION PIPE TEMP. SENSOR
Page 37
5-2. Outdoor Unit
FILE NO. SVM-15036
- 37 -
RAS-5M34S3AV-E, -TR
MS
FAN MOTOR
MS
COMPRESSOR
4WV
4WAY VALVE COIL
PMV E
M
PMV D
M
PMV C
M
PMV B
M
PMV A
M
BLK
3
3
5
5
5
5
5
REACTOR
WHIWHI
GRN
BLK
3
1 2
TO
INDOOR
UNIT C
11
33
MCC-1436
CN200
CN201
CN202
1
CN701
(WHI)
4
+ + +
C11
C12
1
2
3
CN704
4
6
1
2
3
CN703
4
6
1
2
3
CN702
4
6
1
2
3
CN701
4
6
1
2
3
CN700
4
6
12
TO
INDOOR
UNIT D
22
3
POWER
SUPPLY
CIRCUIT
L/F
C10
CN800
(WHI)
12
4 21435
34512 345
CN804
(WHI)
(BLK)
(BLU)
CONTROL
P.C.BOARD
(GRN)
(MCC-5071)
(RED)
(YEL)
CN01
(RED)
WHI
BLU
WHI
BLK
3
12
TO
INDOOR
UNIT E
F100
T3.15A
250V
F01
25A
250V
CN802
(BLU)
CN802
(BLU)
F01
T3.15A
250V
13
BLK
GRY
3
P09
CN300
MAIN P.C.
BOARD
(MCC-1571 )
F03
T10A
250V
5
P05
P04
WHI
BLK
1 2
TO
INDOOR
UNIT A
CN609
(BLU)
CN690
CN04
(WHI)
CN608
(BLK)
CN607
(BLU)
CN606
(GRN)
CN605
(RED)
CN604
(YEL)
CN603
(WHI)
CN602
(WHI)
CN601
(WHI)
CN600
(WHI)
P03
P02
5
5
3
P04
P05
P06
P07
1
2
1
3
5
7
P07
P01
YEL
TO
INDOOR
UNIT B
1
2
1
2
1
2
1
2
1
2
1
3
1
2
1
2
1
3
1
P01
P02
WHI
2
RED
WHI
WHI
BLK
3
THERMOSTAT
FOR
COMPRESSOR
HIGH PRESSURE
SWITCH
TGE
t°
TGD
t°
TGC
t°
TGB
t°
TGA
t°
TS
t°
TO
t°
TE
t°
TD
t°
RED
L
N
POWER
SUPPLY
220-240V 50Hz
220V 60Hz
REACTOR
REACTOR
t°>
P<
EARTH
SCREW
COLOR IDENTIFICATION
BLK:BLACK
BLU:BLUE
RED:RED
PNK:PINK
Symbol
PMV
TD
TE
TO
TS
TGA TGE GAS SIDE PIPE TEMP. SENSOR A E
L / FLINE FILTER
GRN:GREEN
WHI:WHITE
YEL:YELLOW
Part name
PULSE MOTOR VALVE
DISCHARGE PIPE TEMP. SENSOR
CONDENSER PIPE TEMP. SENSOR
OUTDOOR TEMP. SENSOR
SUCTION PIPE TEMP. SENSOR
Page 38
5-3. Outdoor Unit
FILE NO. SVM-15036
- 38 -
RAS-5M34S3AV-A
Wiring between DRED (Demand response enabling device) and Outdoor Unit
This model supports DRM1 DRM2 DRM3.
AS/NZS 4755DRM1
■ Important notice
• Install in accordance with the wiring rules (AS/NZS 3000).
• The precautions described below include important items regarding safety.
Observe them without fail.
• The manufacturer shall not assume any liability for the damage caused by not observing the description of this manual.
DRM2 DRM3
WARNING
• Turn off the main power supply switch or breaker before attempting installation.
Make sure all power switches are off. Failure to do so may cause electric shock.
• Connect the connecting wire correctly.
If the connecting wire is incorrect, electric parts may be damaged.
•
Ensure that all terminals are securely fi xed, so preventing any external forces having a negative
effect on the terminals.
• Do not connect the DRED mains cable to the terminal block of the outdoor unit
(Power supply and Indoor/Outdoor connecting).
Improper installation may result in fi re.
Connect the demand connecting wires and relay connector (RJ45) so that they do not come
•
into contact with the refrigerant cycle parts or refrigerant pipes.
Wire breakage or water intrusion may cause electric shock or fi re.
• Do not screw the DRED signal receiver directly to the outdoor unit.
The screw may damage the internal parts and cause an electric shock, fire or refrigerant leak.
CAUTION
• Wear heavy gloves during the installation work to avoid injury.
Connection procedure
■
• This air conditioner complies with AS/NZS 4755.3.1.
• DRM available: DRM1, DRM2, DRM3
• The terminal block meets ELV requirements.
WARNING
Do not connect the DRED mains cable to
•
the terminal block of the outdoor unit
(Power supply and Indoor/Outdoor
connecting). Improper installation may
result in fi re.
• For the power supply of the DRED,
prepare exclusive power supply
separated from that of the outdoor unit.
WARNING
Connect the wire (4-wire) with a round
terminal to the Demand section (COM,
DRM1, DRM2, DRM3) on the terminal block.
Trans-
former
Demand response interface
CN101
CN102
COM DRM1 DRM2 DRM3
COM DRM1 DRM2 DRM3
DRED
COM DRM1 DRM2 DRM3
CN100
MCC-1653
CN105
Locally procured
LN
Power supply
Outdoor control
P.C. board
123
Indoor (A~E) unit
Connecting
Page 39
Air conditioner demand response
FILE NO. SVM-15036
- 39 -
Demand response mode
DRM1
DRM2
DRM3
*1: E30m = total electrical energy (kWh) used by the air conditioner for all purposes (including compressors, controls and fans) over a 30 min period.
*2: *= rated input electrical power of the air conditioner (kW) at rated capacity in the mode in which it is operating during the demand response event
(i.e.cooling or heating).
■ Wiring procedure
1. Securely fasten the demand connecting wires with the cord clamp located at the upper portion of the terminal block so that no external force is applied to the
terminal.
* The demand connecting wires having a relay connector (RJ45) should be wired in such a manner as to prevent water intrusion into the relay connector.
2. Bundle the demand connecting wires with indoor/outdoor connecting wires using a fi xing band (locally procured).
Description
Compressor off
E30m ≤ R × 0.50 × 0.5
E30m ≤ R × 0.75 × 0.5
Cord clamp
DRED terminal block connections
Banding band
Page 40
6. SPECIFICATIONS OF ELECTRICAL PARTS
FILE NO. SVM-15036
- 40 -
6-1. Outdoor Unit
RAS-5M34S3AV-E, -A, -TR
No.
1
Compressor
2
Outdoor fan motor
3
Reactor
4
Reactor
5
4-way valve coil
6
PMV coil
7
P.C. board (Main PCB)
8
P.C. board (Control PCB)
9
P.C. board (Fan motor connection)
10
Fuse (Mounted on P.C. board MCC-1571)
11
Fuse (Mounted on P.C. board MCC-1571)
12
Fuse (Mounted on P.C. board MCC-1571, MCC-5071)
13
Outdoor temp. sensor (TO sensor)
14
Evaporator temp. sensor (Te sensor)
15
Discharge temp. sensor (Td sensor)
Parts name
Model name
DA270A2T-20LD
WDF-340-A100-1
CH-56-3Z-T
CH-76-TM1
5TF-H01AP1874A1
UKV-A039
MCC-1571
MCC-5071
MCC-1436
—
—
—
—
—
—
Rating
—
Output 100 W
5.8 mH, 18.5 A
9.9 mH, 1 A
AC 200–240 V
DC 12 V
AC 220–240 V
AC 220–240 V
AC 220–240V
AC 250V, 25 A
AC 250V, 10 A
AC 250V, 3.15 A
10 kΩ (25°C)
10 kΩ (25°C)
50 kΩ (25°C)
16
Suction temp. sensor (Ts sensor)
17
Temp. sensor at A room gas side (TGa-sensor)
18
Temp. sensor at B room gas side (TGb-sensor)
19
Temp. sensor at C room gas side (TGc-sensor)
20
Temp. sensor at D room gas side (TGd-sensor)
21
Temp. sensor at E room gas side (TGe-sensor)
22
Compressor thermo.
23
Terminal block (9P)
—
—
—
—
—
—
CS-12AL
—
10 kΩ (25°C)
10 kΩ (25°C)
10 kΩ (25°C)
10 kΩ (25°C)
10 kΩ (25°C)
10 kΩ (25°C)
ON: 90°C, OFF: 125°C
AC 250 V, 20 A
Page 41
7. REFRIGERANT CYCLE DIAGRAM
FILE NO. SVM-15036
- 41 -
High Pressure switch
DA270A2T-20LD
Outdoor unit
NOTE :
• You need not add refrigerant if the piping length is 40m or less.
• If the length exceeds 41m, add 20g of refrigerant per 1 meter over.
• Connection of only one indoor unit is unavailable. Two or more indoor units should be connected.
Page 42
7-2. Operation Data
FILE NO. SVM-15036
- 42 -
Outdoor Unit : RAS-5M34S3AV-E,-A,-TR
<Cooling>
Temperature
condition
IndoorOutdoorABCDEP (MP)T1 (°C)T2 (°C)
27 / 1935 / –131307——0.8 to 1.011 to 1351 to 53High49
No. of
operating
units
1 unit07————0.9 to 1.115 to 1736 to 42High16
2 units0707———0.8 to 1.010 to 1 247 to 49High35
3 units070707——0.8 to 1.011 to 1 351 to 53High49
10————0 .8 to 1.012 to 1436 to 42High19
13————0 .7 to 0.910 to 1236 to 44High31
16————0 .6 to 0.8 9 to 1136 to 46High40
18————0 .6 to 0.810 to 1236 to 47High45
22————0 .6 to 0.8 8 to 1036 to 47High47
24————0 .6 to 0.8 8 to 1036 to 47High60
1007———0.8 t o 1.010 to 1247 to 49High35
1307———0.8 t o 1.010 to 1247 to 49High37
1607———0.8 t o 1.010 to 1247 to 49High40
1807———0.8 t o 1.010 to 1247 to 49High43
2207———0.8 t o 1.010 to 1249 to 51High46
2407———0.7 t o 0.9 9 to 1151 to 53High48
1010———0.8 t o 1.010 to 1247 to 49High35
1310———0.8 t o 1.010 to 1247 to 49High40
1610———0.8 t o 1.010 to 1249 to 51High43
1810———0.8 t o 1.010 to 1249 to 51High46
2210———0.7 t o 0.9 9 to 1151 to 53High48
2410———0.7 t o 0.9 9 to 1151 to 53High51
1313———0.8 t o 1.010 to 1247 to 49High35
1613———0.7 t o 0.9 9 to 1151 to 53High51
1813———0.7 t o 0.9 9 to 1151 to 53High51
2213———0.7 t o 0.9 9 to 1151 to 53High51
2413———0.7 t o 0.9 9 to 1151 to 53High51
1616———0.7 t o 0.9 9 to 1152 to 54High51
1816———0.7 t o 0.9 9 to 1152 to 54High51
2216———0.7 t o 0.9 9 to 1152 to 54High51
2416———0.7 t o 0.9 9 to 1152 to 54High51
1818———0.7 t o 0.9 9 to 1152 to 54High51
2218———0.7 t o 0.9 9 to 1152 to 54High51
2418———0.7 t o 0.9 9 to 1152 to 54High51
2222———0.7 t o 0.9 9 to 1152 to 54High51
2224———0.7 t o 0.9 9 to 1152 to 54High51
2424———0.7 t o 0.9 9 to 1152 to 54High51
100707——0.8 to 1.011 to 1351 to 53High49
130707——0.8 to 1.011 to 1351 to 53High49
160707——0.8 to 1.011 to 1351 to 53High49
18
220707——0.8 to 1.011 to 1351 to 53High49
240707——0.8 to 1.011 to 1351 to 53High49
101007——0.8 to 1.011 to 1351 to 53High49
131007——0.8 to 1.011 to 1351 to 53High49
161007——0.8 to 1.011 to 1351 to 53High49
181007——0.8 to 1.011 to 1351 to 53High49
221007——0.8 to 1.011 to 1351 to 53High49
241007——0.8 to 1.011 to 1351 to 53High49
161307——0.8 to 1.011 to 1351 to 53High49
181307——0.8 to 1.011 to 1351 to 53High49
221307——0.8 to 1.011 to 1351 to 53High49
241307——0.8 to 1.011 to 1351 to 53High49
161607——0.8 to 1.011 to 1351 to 53High49
181607——0.8 to 1.011 to 1351 to 53High49
221607——0.8 to 1.011 to 1351 to 53High49
241607——0.8 to 1.011 to 1351 to 53High49
181807——0.8 to 1.011 to 1351 to 53High49
221807——0.8 to 1.011 to 1351 to 53High49
241807——0.8 to 1.011 to 1351 to 53High49
101010——0.8 to 1.011 to 1351 to 53High49
131010——0.8 to 1.011 to 1351 to 53High49
161010——0.8 to 1.011 to 1351 to 53High49
181010——0.8 to 1.011 to 1351 to 53High49
221010——0.8 to 1.011 to 1351 to 53High49
241010——0.8 to 1.011 to 1351 to 53High49
131310——0.8 to 1.011 to 1351 to 53High49
161310——0.8 to 1.011 to 1351 to 53High49
181310——0.8 to 1.011 to 1351 to 53High49
221310——0.8 to 1.011 to 1351 to 53High49
241310——0.8 to 1.011 to 1351 to 53High49
161610——0.8 to 1.011 to 1351 to 53High49
181610——0.8 to 1.011 to 1351 to 53High49
221610——0.8 to 1.011 to 1351 to 53High49
241610——0.8 to 1.011 to 1351 to 53High49
181810——0.8 to 1.011 to 1351 to 53High49
131313——0.8 to 1.011 to 1351 to 53High49
161313——0.8 to 1.011 to 1351 to 53High49
181313——0.8 to 1.011 to 1
221313——0.8 to 1.011 to 1351 to 53High49
241313——0.8 to 1.011 to 1351 to 53High49
161613——0.8 to 1.011 to 1351 to 53High49
161616——0.8 to 1.011 to 1351 to 53High49
181613——0.8 to 1.011 to 1351 to 53High49
221613——0.8 to 1.011 to 1351 to 53High49
241613——0.8 to 1.011 to 1351 to 53High49
181813——0.8 to 1.011 to 1351 to 53High49
221810——0.8 to 1.011 to 1351 to 53High49
221813——0.8 to 1.011 to 1351 to 53High49
241810——0.8 to 1.011 to 1351 to 53High49
241813——0.8 to 1.011 to 1351 to 53High49
222207——0.8 to 1.011 to 1351 to 53High49
222210——0.8 to 1.011 to 1351 to 53High49
242207——0.8 to 1.011 to 1351 to 53High49
242210——0.8 to 1.011 to 1351 to 53High49
242407——0.8 to 1.011 to 1351 to 53High49
242410——0.8 to 1.011 to 1351 to 53High49
Indoor unit
0707——0.8 to 1.011 to 1351 to 5 3High49
Standard
pressure
Heat exchanger
pipe temperature
351 to 53High49
Indoor
fan
Compressor
revolution
(rps)
NOTES :
1. Measure surface temperature of heat exchanger pipe around of heat exchanger path U bent. (Thermistor thermometer)
1007070 7—0.9 to 1.112 to 1451 to 53High50
1307070 7—0.9 to 1.112 to 1451 to 53High50
1607070 7—0.9 to 1.112 to 1451 to 53High50
1807070 7—0.9 to 1.112 to 1451 to 53High50
2207070 7—0.9 to 1.112 to 1451 to 53High50
2407070 7—0.9 to 1.112 to 1451 to 53High50
1010070 7—0.9 to 1.112 to 1451 to 53High50
1310070 7—0.9 to 1.112 to 1451 to 53High50
1610070 7—0.9 to 1.112 to 1451 to 53High50
1810070 7—0.9 to 1.112 to 1451 to 53High50
2210070 7—0.9 to 1.112 to 1451 to 53High50
2410070 7—0.9 to 1.112 to 1451 to 53High50
1313070 7—0.9 to 1.112 to 1451 to 53High50
1613070 7—0.9 to 1.112 to 1451 to 53High50
1813070 7—0.9 to 1.112 to 1451 to 53High50
2213070 7—1.0 to 1.215 to 1751 to 53High53
2413070 7—1.0 to 1.215 to 1751 to 53High55
1616070 7—0.9 to 1.112 to 1451 to 53High50
1816070 7—1.0 to 1.215 to 1751 to 53High53
2216070 7—1.0 to 1.215 to 1751 to 53High55
2416070 7—1.0 to 1.215 to 1751 to 53High55
1818070 7—1.0 to 1.215 to 1751 to 53High55
2218070 7—1.0 to 1.215 to 1751 to 53High55
2418070 7—1.0 to 1.215 to 1751 to 53High55
1010100 7—0.9 to 1.112 to 1451 to 53High50
1310100 7—0.9 to 1.112 to 1451 to 53High50
1610100 7—0.9 to 1.112 to 1451 to 53High50
1810100 7—0.9 to 1.112 to 1451 to 53High50
2210100 7—0.9 to 1.112 to 1451 to 53High50
2410100 7—1.0 to 1.215 to 1751 to 53High53
1313100 7—0.9 to 1.112 to 1451 to 53High50
1613100 7—0.9 to 1.112 to 1451 to 53High50
1813100 7—0.9 to 1.112 to 1451 to 53High50
2213100 7—1.0 to 1.215 to 1751 to 53High55
2413100 7—1.0 to 1.215 to 1751 to 53High55
1616100 7—1.0 to 1.215 to 1751 to 53High53
1816100 7—1.0 to 1.215 to 1751 to 53High55
2216100 7—1.0 to 1.215 to 1751 to 53High55
2416100 7—1.
1818100 7—1.0 to 1.215 to 1751 to 53High55
2218100 7—1.0 to 1.215 to 1751 to 53High55
2418100 7—1.0 to 1.215 to 1751 to 53High55
1313130 7—1.0 to 1.215 to 1751 to 53High53
1613130 7—1.0 to 1.215 to 1751 to 53High55
1813130 7—1.0 to 1.215 to 1751 to 53High55
2213130 7—1.0 to 1.215 to 1751 to 53High55
2413130 7—1.0 to 1.215 to 1751 to 53High55
1616130 7—1.0 to 1.215 to 1751 to 53High55
1816130 7—1.0 to 1.215 to 1751 to 53High55
2216130 7—1.0 to 1.215 to 1751 to 53High55
2416130 7—1.0 to 1.215 to 1751 to 53High55
1818130 7—1.0 to 1.215 to 1751 to 53High55
2218130 7—1.0 to 1.215 to 1751 to 53High55
2418130 7—1.0 to 1.215 to 1751 to 53High55
1010101 0—0.9 to 1.112 to 1451 to 53High50
1310101 0—0.9 to 1.112 to 1451 to 53High50
1610101 0—0.9 to 1.112 to 1451 to 53High50
1810101 0—0.9 to 1.112 to 1451 to 53High50
2210101 0—1.0 to 1.215 to 1751 to 53High53
2410101 0—1.0 to 1.215 to 1751 to 53High55
1313101 0—0.9 to 1.112 to 1451 to 53High50
1613101 0—1.0 to 1.215 to 1751 to 53High53
2213101 0—1.0 to 1.215 to 1751 to 53High55
2413101 0—1.0 to 1.215 to 1751 to 53High55
1616101 0—1.0 to 1.215 to 1751 to 53High55
1813101 0—1.0 to 1.215 to 1751 to 53High55
2216101 0—1.0 to 1.215 to 1751 to 53High55
2416101 0—1.0 to 1.215 to 1751 to 53High55
1816101 0—1.0 to 1.215 to 1751 to 53High55
1818101 0—1.0 to 1.215 to 1751 to 53High55
2218101 0—1.0 to 1.215 to 1751 to 53High55
2418101 0—1.0 to 1.215 to 1751 to 53High55
1313131 0—1.0 to 1.215 to 1751 to 53High55
1613131 0—1.0 to 1.215 to 1751 to 53High55
1813131 0—1.0 to 1.215 to 1751 to 53High55
2213131 0—1.0 to 1.215 to 1751 to 53High55
2413131 0—1.0 to 1.215 to 1751 to 53High55
1816131 0—1.0 to 1.215 to 1751 to 53High55
2216
2416131 0—1.0 to 1.215 to 1751 to 53High55
1818131 0—1.0 to 1.215 to 1751 to 53High55
2218131 0—1.0 to 1.215 to 1751 to 53High55
2418131 0—1.0 to 1.215 to 1751 to 53High55
1313131 3—1.0 to 1.215 to 1751 to 53High55
1613131 3—1.0 to 1.215 to 1751 to 53High55
1813131 3—1.0 to 1.215 to 1751 to 53High55
2213131 3—1.0 to 1.215 to 1751 to 53High55
2413131 3—1.0 to 1.215 to 1751 to 53High55
1616131 3—1.0 to 1.215 to 1751 to 53High55
1816131 3—1.0 to 1.215 to 1751 to 53High55
2216131 3—1.0 to 1.215 to 1751 to 53High55
2416131 3—1.0 to 1.215 to 1751 to 53High55
1818131 3—1.0 to 1.215 to 1751 to 53High55
2218131 3—1.0 to 1.215 to 1751 to 53High55
2418131 3—1.0 to 1.215 to 1751 to 53High55
Indoor unit
1310—1.0 to 1.215 to 1 751 to 53High55
Standard
pressure
0 to 1.215 to 1751 to 53High55
Heat exchanger
pipe temperature
Indoor
fan
Compressor
revolution
(rps)
NOTES :
1. Measure surface temperature of heat exchanger pipe around of heat exchanger path U bent. (Thermistor thermometer)
1007070 7071.0 to 1.215 to 1751 to 53High65
1307070 7071.0 to 1.215 to 1751 to 53High65
1607070 7071.0 to 1.215 to 1751 to 53High65
1807070 7071.0 to 1.215 to 1751 to 53High65
1010070 7071.0 to 1.215 to 1751 to 53High65
1310070 7071.0 to 1.215 to 1751 to 53High65
1610070 7071.0 to 1.215 to 1751 to 53High65
1810070 7071.0 to 1.215 to 1751 to 53High65
1313070 7071.0 to 1.215 to 1751 to 53High65
1613070 7071.0 to 1.215 to 1751 to 53High65
1813070 7071.0 to 1.215 to 1751 to 53High65
1616070 7071.0 to 1.215 to 1751 to 53High65
1816070 7071.0 to 1.215 to 1751 to 53High65
1010100 7071.0 to 1.215 to 1751 to 53High65
1310100 7071.0 to 1.215 to 1751 to 53High65
1313100 7071.0 to 1.215 to 1751 to 53High65
1610100 7071.0 to 1.215 to 1751 to 53High65
1810100 7071.0 to 1.215 to 1751 to 53High65
1313130 7071.0 to 1.215 to 1751 to 53High65
1613130 7071.0 to 1.215 to 1751 to 53High65
1813130 7071.0 to 1.215 to 1751 to 53High65
1616100 7071.0 to 1.215 to 1751 to 53High65
1816100 7071.0 to 1.215 to 1751 to 53High65
1813130 7071.0 to 1.215 to 1751 to 53High65
1616130 7071.0 to 1.215 to 1751 to 53High65
1816130 7071.0 to 1.215 to 1751 to 53High65
1010101 0071.0 to 1.215 to 1751 to 53High65
1310101 0071.0 to 1.215 to 1751 to 53High65
1610101 0071.0 to 1.215 to 1751 to 53High65
1810101 0071.0 to 1.215 to 1751 to 53High65
1313101 0071.0 to 1.215 to 1751 to 53High65
1613101 0071.0 to 1.215 to 1751 to 53High65
1813101 0071.0 to 1.215 to 1751 to 53High65
1616101 0071.0 to 1.215 to 1751 to 53High65
1313131 0071.0 to 1.215 to 1751 to 53High65
1613131 0071.0 to 1.215 to 1751 to 53High65
1313131 3071.0 to 1.215 to 1751 to 53High65
1613131 3071.0 to 1.215 to 1751 to 53High65
1616131 3071.0 to 1.215 to 1751 to 53High65
1010101 0101.0 to 1.215 to 1751 to 53High65
1310101 0101.0 to 1.215 to 1751 to 53High65
1610101 0101.0 to 1.215 to 1751 to 53High65
1810101 0101.0 to 1.215 to 1751 to 53High65
1313101 0101.0 to 1.215 to 1751 to 53High65
1613101 0101.0 to 1.215 to 1751 to 53High65
1813101 0101.0 to 1.215 to 1751 to 53High65
1616101 0101.0 to 1.215 to 1751 to 53High65
1313131 0101.0 to 1.215 to 1751 to 53High65
1613131 0101.0 to 1.215 to 1751 to 53High65
1813131 0101.0 to 1.215 to 1751 to 53High65
1616131 0101.0 to 1.215 to 1751 to 53High65
1313131 3101.0 to 1.215 to 1751 to 53High65
1613131 3101.0 to 1.215 to 1751 to 53High65
1813131 3101.0 to 1.215 to 1751 to 53High65
1616131 3101.0 to 1.215 to 1751 to 53High65
1313131 3131.0 to 1.215 to 1751 to 53High65
1613131 3131.0 to 1.215 to 1751 to 53High65
2207070 7071.0 to 1.215 to 1751 to 53High65
2210070 7071.0 to 1.215 to 1751 to 53High65
2210100 7071.0 to 1.215 to 1751 to 53High65
2210101 0071.0 to 1.215 to 1751 to 53High65
2210101 0101.0 to 1.215 to 1751 to 53High65
2213070 7071.0 to 1.215 to 1751 to 53High65
2213100 7071.0 to 1.215 to 1751 to 53High65
2213101 0071.0 to 1.215 to 1751 to 53High65
2213101 0101.0 to 1.215 to 1751 to 53High65
2213130 7071.0 to 1.215 to 1751 to 53High65
2213131 0071.0 to 1.215 to 1751 to 53High65
2213131 0101.0 to 1.215 to 1751 to 53High65
2213131 3071.0 to 1.215 to 1751 to 53High65
2407070 7071.0 to 1.215 to 1751 to 53High65
2410070 7071.0 to 1.215 to 1751 to 53High65
2410100 7071.0 to 1.215 to 1751 to 53High65
2410101 0071.0 to 1.215 to 1751 to 53High65
2410101 0101.0 to 1.215 to 1751 to 53High65
2413070 7071.0 to 1.215 to 1751 to 53High65
2413100 7071.0 to 1.215 to 1751 to 53High65
2413101 0071.0 to 1.215 to 1751 to 53High65
2413101 0101.0 to 1.215 to 1751 to 53High65
2413130 7071.0 to 1.215 to 1751 to 53High65
2413131 0071.0 to 1.215 to 1751 to 53High65
Indoor unit
Standard
pressure
Heat exchanger
pipe temperature
Indoor
fan
Compressor
revolution
(rps)
NOTES :
1. Measure surface temperature of heat exchanger pipe around of heat exchanger path U bent. (Thermistor thermometer)
20 / –7 / 6131307——2.5 to 2.737 to 39–2 to 0High60
Outdoor
No. of
operating
units
1 unit07————2.1 to 2.336 to 38 3 to 5High27
2 units0707———2.8 to 3.045 to 47 0 to 2High46
3 units070707——2.3 to 2.538 to 40–1 to 1High59
ABCDEP (MP)T1 (°C)T2 (°C)
10————2.7 to 2.944 to 46 2 to 4High38
13————3.2 to 3.452 to 54 2 to 4High46
16————3.6 to 3.953 to 55 2 to 4High50
18————3.6 to 3.953 to 55 2 to 4High53
22————3.6 to 3.953 to 55 2 to 4High57
24————3.6 to 3.953 to 55 2 to 4High65
1007———2.8 to 3.045 to 47 0 to 2High46
1307———2.8 to 3.045 to 47 0 to 2High47
1607———2.8 to 3.045 to 47 0 to 2High53
1807———2.9 to 3.146 to 48 0 to 2High54
2207———2.9 to 3.146 to 48 0 to 2High56
2407———3.0 to 3.247 to 49–1 to 1High57
1010———2.8 to 3.045 to 47 0 to 2High46
1310———2.8 to 3.045 to 47 0 to 2High48
1610———2.9 to 3.146 to 48 0 to 2High54
1810———2.9 to 3.146 to 48 0 to 2High56
2210———3.0 to 3.247 to 49–1 to 1High57
2410———3.1 to 3.348 to 50–1 to 1High58
1313———2.8 to 3.045 to 47 0 to 2High50
1613———3.0 to 3.247 to 49–1 to 1High57
1813———3.1 to 3.348 to 50–1 to 1High58
2213———3.1 to 3.348 to 50–1 to 1High58
2413———3.1 to 3.348 to 50–1 to 1High58
1616———3.1 to 3.348 to 50–1 to 1High58
1816———3.1 to 3.348 to 50–1 to 1High58
2216———3.1 to 3.348 to 50–1 to 1High58
2416———3.1 to 3.348 to 50–1 to 1High58
1818———3.1 to 3.348 to 50–1 to 1High58
2218———3.1 to 3.348 to 50–1 to 1High58
2418———3.1 to 3.348 to 50–1 to 1High58
2222———3.1 to 3.348 to 50–1 to 1High58
2224———3.1 to 3.348 to 50–1 to 1High58
2424———3.1 to 3.348 to 50–1 to 1High58
100707——2.3 to 2.538 to 40–1 to 1High59
130707——2.3 to 2.538 to 40–1 to 1High59
160707——2.3 to 2.538 to 40–1 to 1High59
180707——2.3 to 2.538 to 40–1 to 1High59
220707——2.3 to 2.538 to 40–1 to 1High59
240707——2.3 to 2.538 to 40–1 to 1High59
101007——2.3 to 2.538 to 40–1 to 1High59
131007——2.3 to 2.538 to 40–1 to 1High59
161007——2.3 to 2.538 to 40–1 to 1High59
181007——2.5 to 2.737 to 39–2 to 0High60
221007——2.3 to 2.538 to 40–1 to 1High59
241007——2.3 to 2.538 to 40–1 to 1High59
161307——2.5 to 2.737 to 39–2 to 0High60
181307——2.5 to 2.737 to 39–2 to 0High60
221307——2.5 to 2.737 to 39–2 to 0High60
241307——2.5 to 2.737 to 39–2 to 0High60
161607——2.5 to 2.737 to 39–2 to 0High60
181607——2.5 to 2.737 to 39–2 to 0High60
221607——2.5 to 2.737 to 39–2 to 0High60
241607——2.5 to 2.737 to 39–2 to 0High60
181807——2.5 to 2.737 to 39–2 to 0High60
221807——2.5 to 2.737 to 39–2 to 0High60
241807——2.5 to 2.737 to 39–2 to 0High60
101010——2.3 to 2.538 to 40–1 to 1High59
131010——2.3 to 2.538 to 40–1 to 1High59
161010——2.5 to 2.737 to 39–2 to 0High60
181010——2.5 to 2.737 to 39–2 to 0High60
221010——2.5 to 2.737 to 39–2 to 0High60
241010——2.5 to 2.737 to 39–2 to 0High60
131310——2.5 to 2.737 to 39–2 to 0High60
161310——2.5 to 2.737 to 39–2 to 0High60
181310——2.5 to 2.737 to 39–2 to 0High60
221310——2.5 to 2.737 to 39–2 to 0High60
241310——2.5 to 2.737 to 39–2 to 0High60
161610——2.5 to 2.737 to 39–2 to 0High60
181610——2.5 to 2.737 to 39–2 to 0High60
221610——2.5 to 2.737 to 39–2 to 0High60
241610——2.5 to 2.737 to 39–2 to 0High60
181810——2.5 to 2.737 to 39–2 to 0High60
131313——2.5 to 2.737 to 39–2 to 0High60
161313——2.5 to 2.737 to 39–2 to 0High60
181313——2.5 to 2.737 to 39–2 to 0High60
221313——2.5 to 2.737 to 39–2 to 0High60
241313——2.5 to 2.737 to 39–2 to 0High60
161613——2.5 to 2.737 to 39–2 to 0High60
161616——2.5 to 2.737 to 39–2 to 0High60
181613——2.5 to 2.737 to 39–2 to 0High60
221613——2.5 to 2.737 to 39–2 to 0High60
241613——2.5 to 2.737 to 39–2 to 0High60
181813——2.5 to 2.737 to 39–2 to 0High60
221810——2.5 to 2.737 to 39–2 to 0High60
221813——2.5 to 2.737 to 39–2 to 0High60
241810——2.5 to 2.737 to 39–2 to 0High60
241813——2.5 to 2.737 to 39–2 to 0High60
222207——2.5 to 2.737 to 39–2 to 0High60
222210——2.5 to 2.737 to 39–2 to 0High60
242207——2.5 to 2.737 to 39–2 to 0High60
242210——2.5 to 2.737 to 39–2 to 0High60
242407——2.5 to 2.737 to 39–2 to 0High60
242410——2.5 to 2.737 to 39–2 to 0High60
Indoor unit
Standard
pressure
Heat exchanger
pipe temperature
Indoor
fan
Compressor
revolution
(rps)
NOTES :
1. Measure surface temperature of heat exchanger pipe around of heat exchanger path U bent. (Thermistor thermometer)
1007070 7—2.5 to 2.735 to 37–2 to 0High60
1307070 7—2.5 to 2.735 to 37–2 to 0High60
1607070 7—2.5 to 2.735 to 37–2 to 0High60
1807070 7—2.5 to 2.735 to 37–2 to 0High60
2207070 7—2.5 to 2.735 to 37–2 to 0High60
2407070 7—2.5 to 2.735 to 37–2 to 0High60
1010070 7—2.5 to 2.735 to 37–2 to 0High60
1310070 7—2.5 to 2.735 to 37–2 to 0High60
1610070 7—2.5 to 2.735 to 37–2 to 0High60
1810070 7—2.5 to 2.735 to 37–2 to 0High60
2210070 7—2.5 to 2.735 to 37–2 to 0High60
2410070 7—2.5 to 2.735 to 37–2 to 0High60
1313070 7—2.5 to 2.735 to 37–2 to 0High60
1613070 7—2.5 to 2.735 to 37–2 to 0High60
1813070 7—2.5 to 2.735 to 37–2 to 0High60
2213070 7—2.4 to 2.634 to 36–2 to 0High60
2413070 7—2.2 to 2.433 to 35–2 to 0High60
1616070 7—2.5 to 2.735 to 37–2 to 0High60
1816070 7—2.4 to 2.634 to 36–2 to 0High60
2216070 7—2.2 to 2.433 to 35–2 to 0High60
2416070 7—2.2 to 2.433 to 35–2 to 0High60
1818070 7—2.2 to 2.433 to 35–2 to 0High60
2218070 7—2.2 to 2.433 to 35–2 to 0High60
2418070 7—2.2 to 2.433 to 35–2 to 0High60
1010100 7—2.5 to 2.735 to 37–2 to 0High60
1310100 7—2.5 to 2.735 to 37–2 to 0High60
1610100 7—2.5 to 2.735 to 37–2 to 0High60
1810100 7—2.5 to 2.735 to 37–2 to 0High60
2210100 7—2.5 to 2.735 to 37–2 to 0High60
2410100 7—2.4 to 2.634 to 36–2 to 0High60
1313100 7—2.5 to 2.735 to 37–2 to 0High60
1613100 7—2.5 to 2.735 to 37–2 to 0High60
1813100 7—2.5 to 2.735 to 37–2 to 0High60
2213100 7—2.2 to 2.433 to 35–2 to 0High60
2413100 7—2.2 to 2.
1616100 7—2.4 to 2.634 to 36–2 to 0High60
1816100 7—2.2 to 2.433 to 35–2 to 0High60
2216100 7—2.2 to 2.433 to 35–2 to 0High60
2416100 7—2.2 to 2.433 to 35–2 to 0High60
1818100 7—2.2 to 2.433 to 35–2 to 0High60
2218100 7—2.2 to 2.433 to 35–2 to 0High60
2418100 7—2.2 to 2.433 to 35–2 to 0High60
1313130 7—2.4 to 2.634 to 36–2 to 0High60
1613130 7—2.2 to 2.433 to 35–2 to 0High60
1813130 7—2.2 to 2.433 to 35–2 to 0High60
2213130 7—2.2 to 2.433 to 35–2 to 0High60
2413130 7—2.2 to 2.433 to 35–2 to 0High60
1616130 7—2.2 to 2.433 to 35–2 to 0High60
1816130 7—2.2 to 2.433 to 35–2 to 0High60
2216130 7—2.2 to 2.433 to 35–2 to 0High60
2416130 7—2.2 to 2.433 to 35–2 to 0High60
1818130 7—2.2 to 2.433 to 35–2 to 0High60
2218130 7—2.2 to 2.433 to 35–2 to 0High60
2418130 7—2.2 to 2.433 to 35–2 to 0High60
1010101 0—2.5 to 2.735 to 37–2 to 0High60
1310101 0—2.5 to 2.735 to 37–2 to 0High60
1610101 0—2.5 to 2.735 to 37–2 to 0High60
1810101 0—2.5 to 2.735 to 37–2 to 0High60
2210101 0—2.4 to 2.634 to 36–2 to 0High60
2410101 0—2.4 to 2.634 to 36–2 to 0High60
1313101 0—2.5 to 2.735 to 37–2 to 0High60
1613101 0—2.4 to 2.634 to 36–2 to 0High60
2213101 0—2.2 to 2.433 to 35–2 to 0High60
2413101 0—2.2 to 2.433 to 35–2 to 0High60
1616101 0—2.4 to 2.634 to 36–2 to 0High60
1813101 0—2.4 to 2.634 to 36–2 to 0High60
2216101 0—2.2 to 2.433 to 35–2 to 0High60
2416101 0—2.4 to 2.634 to 36–2 to 0High60
1816101 0—2.4 to 2.634 to 36–2 to 0High60
1818101 0—2.2 to 2.433 to 35–2 to 0High60
2218101 0—2.4 to 2.634 to 36–2 to
2418101 0—2.4 to 2.634 to 36–2 to 0High60
1313131 0—2.2 to 2.433 to 35–2 to 0High60
1613131 0—2.2 to 2.433 to 35–2 to 0High60
1813131 0—2.2 to 2.433 to 35–2 to 0High60
2213131 0—2.4 to 2.634 to 36–2 to 0High60
2413131 0—2.4 to 2.634 to 36–2 to 0High60
1816131 0—2.2 to 2.433 to 35–2 to 0High60
2216131 0—2.4 to 2.634 to 36–2 to 0High60
2416131 0—2.4 to 2.634 to 36–2 to 0High60
1818131 0—2.2 to 2.433 to 35–2 to 0High60
2218131 0—2.4 to 2.634 to 36–2 to 0High60
2418131 0—2.4 to 2.634 to 36–2 to 0High60
1313131 3—2.2 to 2.433 to 35–2 to 0High60
1613131 3—2.2 to 2.433 to 35–2 to 0High60
1813131 3—2.2 to 2.433 to 35–2 to 0High60
2213131 3—2.4 to 2.634 to 36–2 to 0High60
2413131 3—2.4 to 2.634 to 36–2 to 0High60
1616131 3—2.2 to 2.433 to 35–2 to 0High60
1816131 3—2.2 to 2.433 to 35–2 to 0High60
2216131 3—2.4 to 2.634 to 36–2 to 0High60
2416131 3—2.4 to 2.634 to 36–2 to 0High60
1818131 3—2.2 to 2.433 to 35–2 to 0High60
2218131 3—2.4 to 2.634 to 36–2 to 0High60
2418131 3—2.4 to 2.634 to 36–2 to 0High60
Indoor unit
Standard
pressure
433 to 35–2 to 0High60
Heat exchanger
pipe temperature
Indoor
fan
0High60
Compressor
revolution
(rps)
NOTES :
1. Measure surface temperature of heat exchanger pipe around of heat exchanger path U bent. (Thermistor thermometer)
1007070 7072.0 to 2.232 to 35–2 to 0High78
1307070 7072.0 to 2.232 to 35–2 to 0High78
1607070 7072.0 to 2.232 to 35–2 to 0High78
1807070 7072.0 to 2.232 to 35–2 to 0High78
1010070 7072.0 to 2.232 to 35–2 to 0High78
1310070 7072.0 to 2.232 to 35–2 to 0High78
1610070 7072.0 to 2.232 to 35–2 to 0High78
1810070 7072.0 to 2.232 to 35–2 to 0High78
1313070 7072.0 to 2.232 to 35–2 to 0High78
1613070 7072.0 to 2.232 to 35–2 to 0High78
1813070 7072.0 to 2.232 to 35–2 to 0High78
1616070 7072.0 to 2.232 to 35–2 to 0High78
1816070 7072.0 to 2.232 to 35–2 to 0High78
1010100 7072.0 to 2.232 to 35–2 to 0High78
1310100 7072.0 to 2.232 to 35–2 to 0High78
1313100 7072.0 to 2.232 to 35–2 to 0High78
1610100 7072.0 to 2.232 to 35–2 to 0High78
1810100 7072.0 to 2.232 to 35–2 to 0High78
1313130 7072.0 to 2.232 to 35–2 to 0High78
1613130 7072.0 to 2.232 to 35–2 to 0High78
1813130 7072.0 to 2.232 to 35–2 to 0High78
1616100 7072.0 to 2.232 to 35–2 to 0High78
1816100 7072.0 to 2.232 to 35–2 to 0High78
1813130 7072.0 to 2.232 to 35–2 to 0High78
1616130 7072.0 to 2.232 to 35–2 to 0High78
1816130 7072.0 to 2.232 to 35–2 to 0High78
1010101 0072.0 to 2.232 to 35–2 to 0High78
1310101 0072.0 to 2.232 to 35–2 to 0High78
1610101 0072.0 to 2.232 to 35–2 to 0High78
1810101 0072.0 to 2.232 to 35–2 to 0High78
1313101 0072.0 to 2.232 to 35–2 to 0High78
1613101 0072.0 to 2.232 to 35–2 to 0High78
1813101 0072.0 to 2.232 to 35–2 to 0High78
1616101 0072.0 to 2.232 to 35–2 to 0High78
1313131 0072.0 to 2.232 to 35–2 to
1613131 0072.0 to 2.232 to 35–2 to 0High78
1313131 3072.0 to 2.232 to 35–2 to 0High78
1613131 3072.0 to 2.232 to 35–2 to 0High78
1616131 3072.0 to 2.232 to 35–2 to 0High78
1010101 0102.0 to 2.232 to 35–2 to 0High78
1310101 0102.0 to 2.232 to 35–2 to 0High78
1610101 0102.0 to 2.232 to 35–2 to 0High78
1810101 0102.0 to 2.232 to 35–2 to 0High78
1313101 0102.0 to 2.232 to 35–2 to 0High78
1613101 0102.0 to 2.232 to 35–2 to 0High78
1813101 0102.0 to 2.232 to 35–2 to 0High78
1616101 0102.0 to 2.232 to 35–2 to 0High78
1313131 0102.0 to 2.232 to 35–2 to 0High78
1613131 0102.0 to 2.232 to 35–2 to 0High78
1813131 0102.0 to 2.232 to 35–2 to 0High78
1616131 0102.0 to 2.232 to 35–2 to 0High78
1313131 3102.0 to 2.232 to 35–2 to 0High78
1613131 3102.0 to 2.232 to 35–2 to 0High78
1813131 3102.0 to 2.232 to 35–2 to 0High78
1616131 3102.0 to 2.232 to 35–2 to 0High78
1313131 3132.0 to 2.232 to 35–2 to 0High78
1613131 3132.0 to 2.232 to 35–2 to 0High78
2207070 7072.0 to 2.232 to 35–2 to 0High78
2210070 7072.0 to 2.232 to 35–2 to 0High78
2210100 7072.0 to 2.232 to 35–2 to 0High78
2210101 0072.0 to 2.232 to 35–2 to 0High78
2210101 0102.0 to 2.232 to 35–2 to 0High78
2213070 7072.0 to 2.232 to 35–2 to 0High78
2213100 7072.0 to 2.232 to 35–2 to 0High78
2213101 0072.0 to 2.232 to 35–2 to 0High78
2213101 0102.0 to 2.232 to 35–2 to 0High78
2213130 7072.0 to 2.232 to 35–2 to 0High78
2213131 0072.0 to 2.232 to 35–2 to 0High78
2213131 0102.0 to 2.232 to 35–2 to 0High78
2213131 3072.0 to 2.232 to 35–2 to 0High78
2407070 7072.0 to 2.232 to 35–2 to 0Hig
2410070 7072.0 to 2.232 to 35–2 to 0High78
2410100 7072.0 to 2.232 to 35–2 to 0High78
2410101 0072.0 to 2.232 to 35–2 to 0High78
2410101 0102.0 to 2.232 to 35–2 to 0High78
2413070 7072.0 to 2.232 to 35–2 to 0High78
2413100 7072.0 to 2.232 to 35–2 to 0High78
2413101 0072.0 to 2.232 to 35–2 to 0High78
2413101 0102.0 to 2.232 to 35–2 to 0High78
2413130 7072.0 to 2.232 to 35–2 to 0High78
2413131 0072.0 to 2.232 to 35–2 to 0High78
Indoor unit
Standard
pressure
Heat exchanger
pipe temperature
Indoor
fan
0High78
Compressor
revolution
(rps)
h78
NOTES :
1. Measure surface temperature of heat exchanger pipe around of heat exchanger path U bent. (Thermistor thermometer)
P.M.V : Pulse motor valve
PWM : Pulse width modulation
IPM : Intelligent power module
4-way valve
Page 50
9. OPERATION DESCRIPTION
FILE NO. SVM-15036
- 50 -
9-1. Outline of Air Conditioner Control
This air conditioner is a capacity-variable type air
conditioner, which uses DC motor for the indoor fan
motor and the outdoor fan motor. And the capacityproportional control compressor which can change the
motor speed in the range from 12 to 100 rps is mounted.
The DC motor drive circuit is mounted to the indoor
unit. The compressor and the inverter to control fan
motor are mounted to the outdoor unit.
The entire air conditioner is mainly controlled by the
indoor unit controller.
The indoor unit controller drives the indoor fan motor
based upon command sent from the remote controller,
and transfers the operation command to the outdoor
unit controller.
The outdoor unit controller receives operation
command from the indoor unit side, and controls the
outdoor fan and the pulse motor valve. (PMV)
Besides, detecting revolution position of the
compressor motor, the outdoor unit controller controls
speed of the compressor motor by controlling output
voltage of the inverter and switching timing of the
supply power (current transfer timing) so that motors
drive according to the operation command.
And then, the outdoor unit controller transfers reversely
the operating status information of the outdoor unit to
control the indoor unit controller.
As the compressor adopts four-pole brushless DC
motor, the frequency of the supply power from
inverter to compressor is two-times cycles of the
actual number of revolution.
1. Role of indoor unit controller
The indoor unit controller judges the operation
commands from the remote controller and assumes
the following functions.
• Judgment of suction air temperature of the indoor
heat exchanger by using the indoor temp. sensor.
(TA sensor)
• Judgment of the indoor heat exchanger
temperature by using heat exchanger sensor
(TC sensor) (Prevent-freezing control, etc.)
• Louver motor control
• Indoor fan motor operation control
• LED (Light Emitting Diode) display control
• Transferring of operation command signal
(Serial signal) to the outdoor unit
• Reception of information of operation status
(Serial signal including outside temp. data) to the
outdoor unit and judgment/display of error
• Air purifier operation control
2. Role of outdoor unit controller
Receiving the operation command signal
(Serial signal) from the indoor unit controller, the
outdoor unit performs its role.
• Compressor operation control
• Operation control of outdoor fan motor
• P.M.V. control
• 4-way valve control
⎫
Operations followed to judgment of
⎬
serial signal from indoor side.
⎭
• Detection of inverter input current and current
release operation
• Over-current detection and prevention operation
to IGBT module (Compressor stop function)
• Compressor and outdoor fan stop function when
serial signal is off (when the serial signal does not
reach the board assembly of outdoor control by
trouble of the signal system)
• Transferring of operation information (Serial
signal) from outdoor unit controller to indoor unit
controller
• Detection of outdoor temperature and operation
revolution control
• Defrost control in heating operation
(Temp. measurement by outdoor heat exchanger
and control for 4-way valve and outdoor fan)
3. Contents of operation command signal
(Serial signal) from indoor unit controller to
outdoor unit controller
The following three types of signals are sent from
the indoor unit controller.
• Operation mode set on the remote controller
• Compressor revolution command signal defined
by indoor temperature and set temperature
(Correction along with variation of room
temperature and correction of indoor heat
exchanger temperature are added.)
• Temperature of indoor heat exchanger
• For these signals ([Operation mode] and
[Compressor revolution] indoor heat exchanger
temperature), the outdoor unit controller monitors
the input current to the inverter, and performs the
followed operation within the range that current
does not exceed the allowable value.
4. Contents of operation command signal
(Serial signal) from outdoor unit controller
to indoor unit controller
The following signals are sent from the outdoor unit
controller.
• The current operation mode
• The current compressor revolution
• Outdoor temperature
• Existence of protective circuit operation
For transferring of these signals, the indoor unit
controller monitors the contents of signals, and
judges existence of trouble occurrence.
Contents of judgment are described below.
• Whether distinction of the current operation
status meets to the operation command signal
• Whether protective circuit operates
When no signal is received from the outdoor
2. Outdoor fan motor control ....................................................................................................... 54
3. Capacity control ...................................................................................................................... 55
4.
Current release control ........................................................................................................... 55
5. Winding/Coil heating control ................................................................................................... 56
6. Defrost control (Only in heating operation) ............................................................................. 56
7. Compressor protective control ................................................................................................ 56
8. Discharge temperature control ............................................................................................... 57
9. Pulse motor valve (PMV) control ............................................................................................ 57
High-pressure switch/Compressor case thermostat control .................................................... 57
10.
Various setting on outdoor unit (Power save, Cooling-only, etc.) ............................................ 58
11.
9-3. Intermittent Operation Control for Indoor Fans of the Indoor Unit
at Thermo-off Side in Heating Operation............................................................... 58
Page 52
Item
FILE NO. SVM-15036
- 52 -
Operation flow and applicable data, etc.
Description
1. Basic
operation
1. Operation control
Receiving the user’s operation condition setup, the operation statuses of indoor/outdoor units are
controlled.
1) The operation conditions are selected by the remote controller as shown in the below.
2) A signal is sent by ON button of the remote controller.
3) The signal is received by a sensor of the indoor unit and processed by the indoor controllers as
shown in the below.
4) The indoor controller controls the indoor fan motor and louver motor.
5) The indoor controller sends the operation command to the outdoor controller, and sends/receives
the control status with a serial signal.
6) The outdoor controller controls the operation as shown in the below, and also controls the
compressor, outdoor fan motor, 4-way valve and pulse motor valve.
Selection of
operation conditions
ON/OFF
Remote controller
Control contents of remote controller
• ON/OFF (Air conditioner/Air purifier)
• Operation select (COOL/HEAT/AUTO/DRY)
• Temperature setup
• Air direction
• Swing
• Air volume select (AUTO/LOW/LOW+/MED/MED+/HIGH)
• Sleep mode
• ON timer setup
• OFF timer setup
• High power
Signal receiving
Indoor unit control
ation command
Oper
Serial signal send/receiv
Serial signal send/receive
Outdoor unit control
Indoor unit
Indoor unit control
• Command signal generating function of indoor unit
operation
• Calculation function (temperature calculation)
• Activation compensation function of indoor fan
Cold draft prev
•
• Timer function
• Indoor heat exchanger release control
e
Clean function
•
entive function
Outdoor unit
Outdoor unit control
• Frequency control of inverter output
• Waveform composite function
• Calculation function
(Temperature calculation)
• AD conversion function
• Quick heating function
• Delay function of compressor reactivation
• Current release function
• IPM over-current preventive function
• Defrost operation function
Inverter
• Indoor fan motor
• Louv
er motor
• Moving panel motor
• Air purifier
~
• Compressor
• Outdoor fan motor
• 4-way valve
• Pulse motor valve
(P.M.V.)
Page 53
Item
FILE NO. SVM-15036
- 53 -
Operation flow and applicable data, etc.
Description
1. Basic
operation
2. Operating mode selection when performing 2-room operation
1) The outdoor unit operating mode conforms to the instructions of the indoor unit that was pushed first.
2) When combined operation consisting of cooling (dry) and heating, fan (air purification) and heating,
or cleaning operation and heating is performed, operation conforms to the instructions of the indoor
unit that was pushed first as shown in the following table.
3) The indoor fan stops for the indoor unit that was pushed last and which instructions are ignored.
4) When three or four indoor units are operated concurrently, the priority is also given to operating
mode of the indoor unit which was pushed first as same as the case when two indoor units are
operated concurrently.
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Indoor unit
Pushed first
Pushed last
Pushed first
Pushed last
Pushed first
Pushed last
Pushed first
Pushed last
Pushed first
Pushed last
Pushed first
Pushed last
Pushed first
Pushed last
Pushed first
Pushed last
Pushed first
Pushed last
Pushed first
Pushed last
Pushed first
Pushed last
Pushed first
Pushed last
Pushed first
Pushed last
Pushed first
Pushed last
Pushed first
Pushed last
Pushed first
Pushed last
Set operating mode
Cooling (dry)
Cooling (dry)
Heating
Heating
Fan (solo air purification)
Fan (solo air purification)
Fan (solo air purification)
Fan (solo air purification)
Fan (solo air purification)
Cleaning operation
Cleaning operation
Fan stopped
Heating
Fan stopped
Actual outdoor unit operation
Cooling
Heating
Stopped
Cooling
Cooling
Cooling
Heating
Stopped
Heating
Stopped
Cooling
Cooling
Stopped
Stopped
Stopped
Heating
3. Cooling/Heating operation
The operations are performed in the following parts by controls according to cooling/heating conditions.
1) Receiving the operation ON signal of the remote controller, the cooling or heating operation signal
starts being transferred from the indoor controller to the outdoor unit.
2) At the indoor unit side, the indoor fan is operated according to the contents of “2. Indoor fan motorcontrol” and the louver according to the contents of “10. Louver control”, respectively.
3) The outdoor unit controls the outdoor fan motor, compressor, pulse motor valve (PMV) and
4-way valve according to the operation signal sent from the indoor unit.
∗1. The relay of 4-way valve is turned on, for a few seconds when 4-way valve is driven.
Operation ON
Indoor unit control
Setup of remote controller
Indoor fan motor control / Louver control
Sending of operation command signal
Outdoor unit control
Compressor revolution control / Outdoor fan motor control / 4-way valve control
Pulse motor valve control
Page 54
Item
FILE NO. SVM-15036
- 54 -
Operation flow and applicable data, etc.
Description
Outdoor fan
2.
motor control
The blowing air volume at the outdoor unit side is controlled.
Receiving the operation command from the controller of indoor
unit, the controller of outdoor unit controls fan speed.
∗ For the fan motor, a DC motor with non-stage variable speed
system is used.
However, it is limited to 8 stages for reasons of controlling.
Air conditioner ON
(Remote controller)
Indoor unit controller
1) Outdoor unit
operation command
(Outdoor fan control)
2) Fan speed ≥ 400
when the motor stopped.
YES
OFF status of
fan motor continues.
NO
Fan motor ON
1) The operation command sent
from the remote controller is
processed by the indoor unit
controller and transferred to the
controller of the outdoor unit.
2) When strong wind blows at
outdoor side, the operation of air
conditioner continues with the fan
motor stopped.
3) Whether the fan is locked or not
is detected, and the operation of
air conditioner stops and an
alarm is displayed if the fan is
locked.
4) According to each operation
mode, by the conditions of
outdoor temperature (To) and
compressor revolution, the speed
of the outdoor fan shown in the
table is selected.
1) Four indoor units from A to E determine the respective instruction revolutions from the difference
between the remote controller setting temperature (Ts) and the indoor temperature (Ta), and
transmit this to the outdoor unit.
2) The outdoor unit receives the instructions from the indoor units, and the inverter operates the
compressor at the calculated revolutions.
3) The compressor operation range in each operating mode is shown in the left table.
Indoor unit A
Indoor unit B
Indoor unit C
Indoor unit D
Indoor unit E
Operation
mode
COOL
No.of
operating
unit
1 unit
2 units
3 units
4 units
5 units
Combination
of indoor units
M07
M10
M13
M16
M18
M22
M24
∗
{
∗
{
∗
{
∗
{
Compressor
revolution
12.0 to 22.1
12.0 to 22.1
12.0 to 34.1
12.0 to 43.1
12.0 to 44.9
12.0 to 56.2
12.0 to 80.2
12.0 to 53.3
24.5 to 56.2
24.5 to 56.2
24.5 to 80.2
∗ : In case that any multiple indoor units are combined.
(rps)
Outdoor unit
Inverter
Operation
mode
HEAT
Compressor
No.of
operating
unit
1 unit
2 units
3 units
4 units
5 units
Combination
of indoor units
M07
M10
M13
M16
M18
M22
M24
∗
{
∗
{
∗
{
∗
{
Compressor
revolution
(rps)
12.0 to 42.5
12.0 to 42.5
12.0 to 51.5
12.0 to 54.4
12.0 to 69.4
12.0 to 73.6
12.0 to 100.5
12.0 to 73.6
14.4 to 73.6
18.0 to 73.6
18.0 to 100.5
Current release
4.
control
Outdoor unit inverter main
circuit control current
Operating current ≤
Setup value
Low
Capacity control continues.
Outdoor temp.
45˚C
40˚C
16˚C
11˚C
This function prevents troubles on the electronic parts of the
compressor driving inverter.
This function also controls drive circuit of the compressor
speed so that electric power of the compressor drive circuit
does not exceed the specified value.
Outdoor temp. To
Setup of current release point
High
Reduce compressor speed
Current decrease
44˚C
39˚C
Cooling current
release value
9.5 A
12.0 A
Heating current
release value
12.6 A
15.5˚C
10.5˚C
15.0 A
12.6 A
16.4 A
1) The input current of the outdoor
unit is detected in the inverter
section of the outdoor unit.
2) According to the detected
outdoor temperature, the
specified value of the current is
selected.
3) Whether the current value
exceeds the specified value or
not is judged.
4) If the current value exceeds the
specified value, this function
reduces the compressor speed
and controls speed up to the
closest one commanded from
the indoor unit within the range
which does not exceed the
specified value.
Page 56
Item
FILE NO. SVM-15036
- 56 -
Operation flow and applicable data, etc.
Description
Winding/Coil
5.
heating control
Defrost control
6.
(Only in heating
operation)
When the outdoor temperature is low, the windings/
coils are heated to ensure compressor reliability.
Outdoor temperature To
0˚C
-1˚C
–5˚C
–6˚C
Winding/Coil
heating amount
OFF
20 W
65 W
(This function removes frost adhered to the outdoor
heat exchanger.)
The temperature sensor of the outdoor heat exchanger (Te sensor) judges the frosting status of the
outdoor heat exchanger and the defrost operation is
performed with 4-way valve reverse defrost system.
Start of heating operation
0’
10’ 15’
–5°C
–8°C
–10°C
Outdoor heat
–20°C
exchanger temperature
29’ 35’
Operation time
(Minute)
C zone
A zone
B zone
90’ 6 hours
*
* The minimum value of Te sensor 10 to 15 minutes after start of
operation is stored in memory as Te0 and Te1. (–10°C < Te1 ≤ 10°C)
Table 1
A zone
B zone
C zone
D zone
E zone
When Te0 - TE ≥ 2.5 continued for 2 minutes in A zone,
defrost operation starts.
When the operation continued for 2 minutes in B zone,
defrost operation starts.
When Te0 - TE ≥ 3 continued for 2 minutes in C zone,
defrost operation starts.
When the operation continued for 2 minutes in D zone,
defrost operation starts.
When Te1 - TE ≥ 1 continued for 2 minutes in E zone,
defrost operation starts.
E zone
D zone
Winding/Coil heating is performed when
the following conditions are met.
Condition 1 :
When the discharge sensor temperature
(Td) is less than 30°C.
Condition 2 :
When the outdoor sensor temperature (To)
is as shown in the left figure.
The necessity of defrost operation is
detected by the outdoor heat exchanger
temperature. The conditions to detect the
necessity of defrost operation differ in A,
B, C, D or E zone each. (Table 1)
<Defrost operation>
• Defrost operation in A to E zones
1) Stop operation of the compressor for
30 seconds.
2) Invert (OFF) 4-way valve 10 seconds
after stop of the compressor.
3) The outdoor fan stops at the same time
when the compressor stops.
4) When temperature of the indoor heat
exchanger becomes 38°C or lower,
stop the indoor fan.
<Finish of defrost operation>
• Returning conditions from defrost
operation to heating operation
1) Temperature of outdoor heat exchanger
rises to +8°C or higher.
2) Temperature of outdoor heat exchanger
is kept at +5°C or higher for 80 seconds.
3) Defrost operation continues for
10 minutes.
<Returning from defrost operation>
1) Stop operation of the compressor for
approx. 60 seconds.
2) Invert (ON) 4-way valve approx. 40
seconds after stop of the compressor.
3) The outdoor fan starts rotating at the
same time when the compressor starts.
Compressor
7.
protective
control
1) This control purposes to raise the operation frequency until 36Hz for 2 minutes in order to
protect the compressor (Prevention of oil accumulation in the refrigerating cycle) when the status
that the operation frequency is 36Hz or less has continued for 10 hours was calculated.
The operation frequency follows the normal indoor command after controlling.
2) Although the compressor may stop by THERMO-OFF control when the room temperature varies
and then attains the set temperature by this control, it is not abnormal.
3) During this control works, it stopping the operation by the remote controller, the operation does
not continue.
Page 57
Item
FILE NO. SVM-15036
- 57 -
Operation flow and applicable data, etc.
Description
Discharge
8.
temperature
control
Td value
Pulse motor
9.
valve (PMV)
control
∗ SH control
120°C
115°C
111°C
108°C
101°C
Control operation
Judges as an error and stops the compressor.
Reduce the compressor speed.
Reduce slowly compressor speed.
Keeps the compressor speed.
If the operation is performed with lower speed than
one commanded by the serial signal, speed is slowly
raised up to the commanded speed.
Operates with speed commanded by the serial signal.
This function controls throttle amount of the
refrigerant in the refrigerating cycle.
According to operating status of the air conditioner,
this function also controls the open degree of valve
with an expansion valve with pulse motor.
Starting up
Initialize
Move to initial position
Compressor ON
TD release control
1. Purpose
This function detects error on the
refrigerating cycle or error on the
compressor, and performs protective control.
2. Operation
• Control of the compressor speed
The speed control is performed as
described in the left table based upon
the discharge temperature.
1) When starting the operation, move the
valve once until it fits to the stopper.
(Initialize)
∗ In this time, “Click” sound may be heard.
2) Adjust the open degree of valve by super
heat amount. (SH control)
3) If the discharge temperature was
excessively up, adjust the open degree of
valve so that it is in the range of set
temperature. (Discharge temp. control)
4) When defrost operation is performed, the
open degree of PMV is adjusted according
to each setup conditions during
preparation for defrost and during defrost
operation (4-way valve is inversed.).
5) When turning off the compressor by
thermo. OFF or STOP by remote
controller, the open degree of the PMV is
adjusted to the setup value.
Stop by
remote controller
Setup value
Power OFF
10. High-pressure
switch/
Compressor
case
thermostat
control
∗ PMV open degree control
Thermo. OFFDefrost
Setup valueSetup value
∗ SH (Super Heat amount) =
Ts (Temperature of suction pipe of the compressor) –
Tc or Te (Heat exchanger temperature at evaporation side)
∗ PMV: Pulse Motor Valve
1) When the high-pressure switch or the compressor case thermostat operates, the operation of
the compressor is terminated.
The compressor restarts after 2 minutes 30 seconds using [1] as an error count.
2)
After restart, the error count is cleared
when operation continues for 10 minutes or more.
3) An error is confirmed with the error count [10].
4) For the indicated contents of error, confirm using the check code table.
Page 58
Item
FILE NO. SVM-15036
- 58 -
Operation flow and applicable data, etc.
Description
Various setting
11.
The following settings are availiable by DIP switch setup.
on outdoor unit
(Power save,
Cooling-only, etc.)
Function
Power save
setup
Cooling-only
setup
Heating-only
setup
Setting positionControl contents
SW802
1 2 3 4
SW801
1 2 3 4
ON
OFF
Select current limit
Power save function
ON
OFF
Cooling only setting
Heating only setting
Turn the switch to ON, when using the power save function.
SW802
No.1ONONOFFOFF
No.2OFFONONOFF
Current limit11A8.5AFullFull (Default)
When using the air conditioner as a cooling-only
conditioner, turn the switch to ON.
(If the heating mode is selected by remote controll, outdoor
unit will remain stop. If mixed with indoor unit cooling and
heating, outdoor unit performs cooling operation.)
When using the air conditioner as a heating-only
conditioner, turn the switch to ON.
(If the cooling mode is selected by remote controll, outdoor
unit will remain stop. If mixed with indoor unit cooling and
heating, outdoor unit performs heating operation.)
Caution:Set the switch before turning on the power supply.
9-3. Intermittent Operation Control for Indoor Fans of the Indoor Unit at Thermo-off
Side in Heating Operation
While heating operation is executed in two rooms, if room temperature reached the setup temperature in one
room and thermo-off occurred, the following operations start. (Refer to the figure below.)
1. The indoor unit of the room (A room) in which thermo-off did not occur starts a continuous operation with
the setup number of revolution.
2. The indoor unit of the room (B room) in which thermo-off occurred starts intermittent operation of the indoor fan.
The indoor fan operates with number of revolution of UL or SUL. Fan-ON time is 2 minutes and Fan-OFF
time is 2 to 4 minutes.
However if temperature of the indoor heat exchanger becomes over 55°C or more in B room, the indoor fan
stops the intermittent operation and starts continuous operation.
While heating operation is executed in 2 rooms, if room temperature reached the setup temperature in both
rooms and thermo-off occurred, both indoor units start intermittent operation of the indoor fan.
Indoor fan: Operates with setup number of revolution
Thermo-ON continues
A room
B room thermo-ON
↓
Thermo-OFF
↓
Thermo-ON
0 rpm
0 rpm
UL
(∗1)
B room thermo-OFFB room thermo-ON
Operated with setup number
of revolution
∗1 Operated with UL or SUL
Fan stop
UL
(∗1)
(∗1)
Fan stopFan stop
UL
T onT onT on
T offT offT off
∗ In case which Tc sensor temperature exceeds 55˚C
in B room, the fan stops intermittent operation and
starts continuous operation with UL or SUL (∗1).
T on=2 min.
T off time
To < 5˚C
5 < To < 10
10 < To
2 min.
3 min.
4 min.
Page 59
10. INSTALLATION PROCEDURE
FILE NO. SVM-15036
- 59 -
10-1. Installation/Servicing Tools
Changes in the product and components
In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged
accidentally, the service port diameter of the outdoor unit control valve (3-way valve) has been changed.
(1/2 UNF 20 threads per inch)
• In order to increase the pressure resisting strength of the refrigerant piping flare processing diameter and
size of opposite side of flare nuts has been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)
New tools for R410A
New tools for R410A
Gauge manifold
Charge hose
Electronic balance
for refrigerant charging
Torque wrench
(nominal diam. 1/2, 5/8)
Flare tool (clutch type)
Gauge for projection
adjustment
Vacuum pump adapter
Applicable to R22 model
×
×
{
×
{
——
{
Changes
As pressure is high, it is impossible to measure by means of
conventional gauge. In order to prevent any other refrigerant from
being charged, each port diameter has been changed.
In order to increase pressure resisting strength, hose materials and
port size have been changed (to 1/2 UNF 20 threads per inch).
When purchasing a charge hose, be sure to confirm the port size.
As pressure is high and gasification speed is fast, it is difficult to
read the indicated value by means of charging cylinder, as air
bubbles occur.
The size of opposite sides of flare nuts have been increased.
Incidentally, a common wrench is used for nominal diameters 1/4
and 3/8.
By increasing the clamp bar’s receiving hole, strength of spring in
the tool has been improved.
Used when flare is made by using conventional flare tool.
Connected to conventional vacuum pump. It is necessary to use
an adapter to prevent vacuum pump oil from flowing back to the
charge hose. The charge hose connecting part has two ports-one
for conventional refrigerant (7/16 UNF 20 threads per inch) and
one for R410A. If the vacuum pump oil (mineral) mixes with R410A
a sludge may occur and damage the equipment.
Gas leakage detector
• Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) and protector coating in the
U. S’s ARI specified rose color (ARI color code: PMS 507).
• Also, the “charge port and packing for refrigerant cylinder” require 1/2 UNF 20 threads per inch corresponding to
the charge hose’s port size.
• Incorrect wiring connection may cause electrical parts to burn out.
• Be sure to comply with local regulations/codes when running the wire from outdoor unit to indoor unit.
(Size of wire and wiring method etc.)
• Every wire must be securely connected.
• If incorrect or incomplete wiring is carried out, fire or smoke may result.
• Prepare the power supply for the exclusive use of the air conditioner.
×
Exclusive for HFC refrigerant.
CAUTION
Page 60
10-2. Outdoor Unit
FILE NO. SVM-15036
- 60 -
10-2-1. Accessory and Installation Parts
Inst
allation manual
F-GAS label
∗1
15
1
Rubber cap
(Water-proof)
Drain nipple
1
CD-ROM
(Installation manual)
∗1
1
∗1 Part that do not exist in RAS-5M34S3AV-A,-TR.
10-2-2. Refrigerant Piping
• Piping kit used for the conventional refrigerant cannot be used.
• Use copper pipe with 0.8 mm or more thickness.
• Flare nut and flare works are also different from those of the conventional refrigerant.
Take out the flare nut attached to the main unit of the air conditioner, and use it.
10-2-3. Installation Place
• A place which provides the spaces around the outdoor unit.
• A place where the operation noise and discharged air do not disturb your neighbors.
• A place which is not exposed to a strong wind.
• A place which does not block a passageway.
• When the outdoor unit is to be installed in an elevated position, be sure to secure its feet.
• There must be sufficient spaces for carrying the unit into and out of the site.
• A place where the drain water does not raise any problem.
• A place which can bear the weight of the outdoor unit and does not allow an increase in noise level and vibration.
CAUTION
1. Install the outdoor unit without anything blocking the air discharging.
2. When the outdoor unit is installed in a place exposed always to a
strong wind like a coast or on a high story of a building, secure the
normal fan operation using a duct or a wind shield.
3. Especially in windy area, install the unit to prevent the admission of wind.
4. Installation in the following places may result in trouble. Do not install the unit in such places.
• A place full of machine oil.• A place full of sulfide gas.
• A place where high-frequency waves are likely• A saline-place such as a coast.
to be generated as from audio equipment,
welders, and medical equipment.
10-2-4. Optional Installation Parts (Local Supply)
Parts name
Refrigerant piping ∗1
Putty, PVC tapes
Indoor unit (abbreviation)Liquid side (O.D.)Gas side (O.D.)
07, 10, 136.35 mm9.52 mm
16, 18, 22, 246.35 mm12.7 mm
Parts name
OKNO GOOD
Strong
wind
Fig. 10-2-1
Q’ty
1 ea.
1 ea.
∗1 Refrigerant piping covered with insulating material (Polyetylene form, 6 mm thick).
When duct-type or cassette-type unit is to be installed, it shall be covered with thicker insulating material
(Polyetylene form, 10 mm thick).
Page 61
10-2-5. Installation
FILE NO. SVM-15036
- 61 -
NOTE
For installation, at least 3 dimensions should be
kept free from obstacles (walls).
Necessary space for installation
If you need to install the outdoor unit in a location
where there are some obstructions or a wall, secure
sufficient space as shown in the figure below.
The cooling/heating effect may be reduced by 10%.
Upper side view (Unit: mm)
200
or more
150
or more
500
or more
150
or more
300
or more
150
or more
1000
or more
1. Piping connections to the outdoor unit should be
arranged in the sequence A, B, C, D, E starting
from the bottom.
(For each piping connection, the gas pipe is on
the bottom and the liquid pipe is on the top.)
2. When multiple indoor units are to be connected to
the outdoor unit, make the ends of the pipes and
wires from each indoor unit to ensure that they will
be connected to the outdoor unit correctly.
(Problems caused by indoor units being connected to the outdoor unit incorrectly are very
common in multiple-unit installations.)
3. The length and height difference of the connecting pipes between the indoor and outdoor units
must be within the ranges indicated below.
• Total piping length :
Non. Additional refrigerant ....................... 40 m
Additional refrigerant .............................. 80 m
..................... 41 to 80 m
Additional 20 g of refrigerant ..... Per every 1 m
• Minimum piping length :
A or B or C or D or E = 3 m or more
• Maximum indoor piping length :
A or B or C or D or E = 25 m or less
• Maximum piping height difference :
A or B or C or D or E = 15 m or less
• Maximum piping/height difference between
2 units = 15 m or less
Fig. 10-2-2
Side view (Unit: mm)
500
or more
150
or more
Fig. 10-2-3
1000
or more
1000
or more
Fixing bolt arrangement of outdoor unit
600
Suction side
365
Diffuser
Fig. 10-2-4
• Secure the outdoor unit with the fixing bolts and nuts
if the unit is likely to be exposed to a strong wind.
• Use Ø8 mm or Ø10 mm anchor bolts and nuts.
C
D
E
15 m or less
less
15 m or
A
Outdoor
unit
15 m or less
B
Fig. 10-2-5
4. Connect 2 or more indoor units for heat pump.
5. If the outdoor units is to be mounted on a wall,
make sure that the platform supporting it is
sufficiently strong.
The platform should be designed and manufactured to maintain its strength over a long period
of time, and sufficient consideration should be
given to ensuring that the outdoor unit will not fall.
6. When the outdoor unit is to be mounted high on
a wall, take particular care to ensure that parts
do not fall installer is protected.
7. When doing installation work on level ground, it
is usual to wiring and piping connections to the
indoor units. And/then make to the outdoor unit.
However if outdoor work is difficult it is possible
instead to make changes to the procedure.
For example by making adjustments to the wiring
and piping length on the inside
(rather than the outside).
Page 62
FILE NO. SVM-15036
- 62 -
How to remove the front panel
1. Remove 5 screws of the front panel.
2. Pull the front panel downward.
• Tightening torque of flare pipe
The pressure of R410A is higher than R22.
(Approx. 1.6 times)
Therefore securely tighten the flare pipes which
connect the outdoor unit and indoor unit with the
specified tightening torque using a torque wrench.
If any flare pipe is incorrectly connected, it may
cause not only a gas leakage but also trouble in
the refrigeration cycle.
Flare at
indoor
unit side
Flare at
outdoor
unit side
Fig. 10-2-7
Fig. 10-2-6
Tightening connection
Align the centers of the connecting pipes and
tighten the flare nut as far as possible with your
fingers.
Then tighten the nut with a spanner and torque
wrench as shown in the figure.
CAUTION
• Do not apply excess torque.
Otherwise, the nut may break.
(Unit : N·m)
Outer dia. of copper pipe
Tightening torque
Half union
Externally
threaded side
Use a wrench to secure.
Flare nut
Internally
threaded side
Use a torque wrench to tighten.
Fig. 10-2-8
Ø6.35 mm
Ø9.52 mm
Ø12.7 mm
14 to 18 (1.4 to 1.8 kgf•m)
33 to 42 (3.3 to 4.2 kgf•m)
50 to 62 (5.0 to 6.2 kgf•m)
Fig. 10-2-9
Connectable capacity class
ABCDE
07, 10, 1316
(with reducer)(with expander)
16, 18, 22, 2407, 10, 13
Total
68
Page 63
10-2-6. Refrigerant Piping Connection
FILE NO. SVM-15036
- 63 -
CAUTION
10-2-7. Evacuating
After the piping has been connected to all indoor unit(s),
you can perform the air purge together at once.
KEEP IMPORTANT 4 POINTS FOR PIPING WORK
1. Keep dust and moisture from entering the pipes.
2. Tight connection (between pipes and unit)
3. Evacuate the air in the connecting pipes using
VACUUM PUMP.
4. Check gas leak. (connected points)
Flaring
1. Cut the pipe with a pipe cutter.
OKNO GOOD
90˚
Fig. 10-2-10
2. Insert a flare nut into the pipe, and flare the
pipe. As the flaring sizes of R410A differ from
those of refrigerant R22, the flare tools newly
manufactured for R410A are recommended.
However, the conventional tools can be used by
adjusting projection margin of the copper pipe.
• Projection margin in flaring :
B (Unit : mm)
Rigid (Clutch type)
Outer dia. of
copper pipe
6.35
9.52
12.7
R410A tool used
R410AR22
0 to 0.5 (Same as left)
0 to 0.5 (Same as left)
0 to 0.5 (Same as left)
Imperial (Wing nut type)
Outer dia. of copper pipe
6.35
9.52
12.7
• Flaring size : A (Unit : mm)
Obliquity RoughnessWarp
Fig. 10-2-11
Conventional tool used
R410AR22
1.0 to 1.50.5 to 1.0
1.0 to 1.50.5 to 1.0
1.0 to 1.50.5 to 1.0
R410AR22
1.5 to 2.01.0 to 1.5
1.5 to 2.01.0 to 1.5
2.0 to 2.51.5 to 2.0
A
AIR PURGE
Evacuate the air in the connecting pipes and in the
indoor unit using vacuum pump.
Do not use the refrigerant in the outdoor unit.
For details, see the manual of vacuum pump.
Use a vacuum pump
Be sure to use a vacuum pump with counter-flow
prevention function so that inside oil of the pump
does not flow backward into pipes of the air
conditioner when the pump stops.
(If inside oil of the vacuum pump enters into the air
conditioner which adopts R410A, a trouble of the
refrigeration cycle may be caused.)
1. Connect the charge hose from the manifold valve
to the service port of the gas side packed valve.
2. Connect the charge hose to the port of vacuum
pump.
3. Open fully the low pressure side handle of the
gauge manifold valve.
4. Operate the vacuum pump to start for evacuating.
Perform evacuating for about 40 minutes if the
piping length is total 80 meters.
B
(assuming a pump capacity of 27 liters per minute.)
Then confirm that the compound pressure gauge
reading is –101 kPa ( –76 cmHg).
5. Close the low pressure side valve handle of
gauge manifold.
6. Open fully the valve stem of the packed valves
(both sides of Gas and Liquid).
7. Remove the charging hose from the service port.
8. Securely tighten the caps on the packed valves.
Compound
pressure gauge
–101kPa
(–76cmHg)
Handle Lo
Charge hose
(For R410A only)
Pressure gauge
Manifold valve
Handle Hi
(Keep full closed)
Charge hose
(For R410A only)
Outer dia. of copper pipe
6.35
9.52
12.7
∗ In the case of flaring for R410A with the conventional
flare tool, pull out it approx. 0.5 mm more than that
for R22 to adjust to the specified flare size.
The copper pipe gauge is useful for adjusting
projection margin size.
Fig. 10-2-12
R410AR22
9.1 9.0
13.213.0
16.616.2
+0
A
- 0.4
Service port
(Valve core
(Setting pin))
Packed valve
at gas side
Packed valve
at liquid side
Vacuum pump
adapter for
counter-flow prevention
(For R410A only)
Vacuum pump
Fig. 10-2-13
Page 64
FILE NO. SVM-15036
- 64 -
Packed valve handling precautions
• Open the valve stem all the way out ; do not try
to open it beyond the stopper.
• Securely tighten the valve stem cap in torque
is as follows :
Gas side (Ø12.7 mm)
Gas side (Ø9.52 mm)
Liquid side (Ø6.35 mm)
Service port
50 to 62 N•m (5.0 to 6.2 kgf•m)
33 to 42 N•m (3.3 to 4.2 kgf•m)
14 to 18 N•m (1.4 to 1.8 kgf•m)
14 to 18 N•m (1.4 to 1.8 kgf•m)
Hexagonal wrench is required.
Fig. 10-2-14
10-2-8. Electrical Work
For the air conditioner that has no power cord,
connect a power cord to it as mentioned below.
Fig. 10-2-15
Fig.10-2-16
Model
Power supply
Maximum running current
Installation fuse rating
Power cord
Wiring connection
5 Units Multi
5M34S3AV-E,-A,-TR
220 – 240 V, ~50 Hz
220 V, ~60 Hz
19.5 A
20 A breaker of fuse
(All types can be used.)
H07 RN-F or 245 IEC 66
(2.5 mm² or more)
1. Remove the front panel and cord clamp from
the outdoor unit.
2. Connect the connecting cable to the terminal
as identified by the matching numbers on the
terminal block of indoor and outdoor unit.
3. Insert the power cord and the connecting
cable fully into the terminal block and secure
it tightly with screws.
4. Insulate the unused cords (conductors) from
water entering in the outdoor unit. Locate
them so that they do not touch any electrical
or metal parts.
5. Secure the power cord and the connecting
cable with the cord clamp.
6. Attach the front panel on the outdoor unit.
CAUTION
• Wrong wiring connection may cause some electrical
parts burn out.
• Be sure to use the cord clamps specified positions
with attached to the product.
• Do not damage or scratch the conductive core and
inner insulator of power and inter-connecting cables
when peeling them.
• Be sure to comply with local codes on running the
wire from outdoor unit to indoor unit (size of wire and
wiring method etc.)
• Use the power cord and Inter-connecting cable with
specified thickness, specified type, and protective
devices specified.
Stripping length power cord and
connecting cable
10
123
10
30
40
Earth line
Power cord
10
L N
10
40
30
Earth line
Connecting
cable
Fig. 10-2-17
Page 65
10-2-8. Check and Test Operation
FILE NO. SVM-15036
- 65 -
For R410A, use the leak detector exclusively manufactured for HFC refrigerant (R410A, R134a, etc.).
* The conventional leak detector for HCFC refriger-
ant (R22, etc.) cannot be used because its sensitivity for HFC refrigerant lowers to approx. 1/40.
• Pressure of R410A becomes approx. 1.6 times of
that of R22. If installation work is incompletely
finished, a gas leakage may occur in the cases
such as pressure rise during operation. Therefore,
be sure to test the piping connections for leaking.
Fig. 10-2-18
• Check the flare nut connections, valve stem cap
connections and service port cap connections for
gas leak with a leak detector or soap water.
10-2-9. Miswiring (Mispiping) Check
Make sure that the wiring and piping for each room
have the same alphabetical codes (A, B, C, D, E).
Connect and secure the power cord.
Use the power cord/cables with thickness, type and
protective devices specified in this manual.
Insulate the unused cords (conductors) with PVC tape.
1. Detach the front panel of the outdoor unit.
Do not remove the air discharge grille.
2. Turn on the circuit breaker to supply electricity.
3. Start running all the indoor units connected to the
outside unit in the cooling mode.
• You need not specify the temperature setting of
the indoor units.
• You cannot check wiring/piping when the external
temperature is 5°C or less.
4. Turn on the SW802 No.4 switch on hte P.C. board
MCC 5071.
The wiring / piping check starts automatically.
While checking, each LED flashes consecutively to
indicate that the checking each indoor unit is in
progress. When checking is complete, the check
result is displayed on the LED panel.
See the table below for datails.
4-1. If no problems are detected.
The checking operation returns to the normal
operation automatically.
The compressor stops temporarily, then it
restarts. The D801 LED flashes while the
compressor is stopped.
4-2. If incorrect wiring/piping is detected.
The checking operation stops.
Check the status of the LED to confirm the
details of the problem. Turn off the circuit
breaker, then check wiring/piping again.
5. Turn off SW802 No.4 switch on the P.C. board
MCC 5071.
• The checking operation changes to the normal
operation.
• Use a circuit breaker of a type that is not tripped
by shock waves.
• If incorrect/incomplete wiring is carried out, it will
cause an electrical fire or smoke.
• Prepare the power supply for exclusive use with
the air conditioner.
• This product can be connected to the mains.
Connection to fixed wiring :
A switch or circuit breaker which disconnects all
poles and has a contact separation of at least
3 mm must be incorporate in the fixed wiring.
An approved short circuit breaker or switches
must be used.
∗ (A breaker having a sensitivity of approxi-
mately 0.1 second or less and a capacity of
approximately 30 mA is usually used.)
Check the flare nut connections for gas leaks with a
gas leak detector and/or soapy water.
Fig. 10-3-1
10-3-2. Test Operation
To switch the TEST RUN (COOL) mode, press
RESET button for 10 sec.
(The beeper will make a short beep.)
• When two indoor units are installed in the same room or
adjacent two rooms, if operating a unit, two units may
receive the remote control signal simultaneously and
operate. In this case, the operation can be preserved
by setting either one remote control to B setting.
(Both are set to A setting in factory shipment.)
•
The remote control signal is not received when the
settings of indoor unit and remote control are different.
•
There is no relation between A setting/B setting and A
room/B room when connecting the piping and cables.
<Remote control A-B selection>
To separate using of remote control for each indoor unit
in case of 2 air conditioners are installed nearly.
<Remote Control B Setup>
1. Press [RESET] button on the indoor unit to turn the air
conditioner ON.
2.. Point the remote control at the indoor uni
Push and hold [CHECK] button on the Remote Control
3.
by the tip of the pencil. "00" will be shown on the display
(Picture )
1
4. Press [MODE] during pushing [CHECK]. "B" will show
on the display and "00" will disappear and the air
conditioner will turn OFF. The Remote Control B
is memorized [Picture ).
NOTE : 1. Repeat above step to reset Remote
2
Control to be A.
2.. Remote Control A has not "A" displa
3.. Default setting of Remote Control fr
factory is A.
RESET button
Fig. 10-3-2
10-3-3. Setting the Auto Restart
This product is designed so that, after a power
failure, it can restart automatically in the same
operating mode as before the power failure.
NOTE
The product was shipped with Auto Restart function
in the OFF position. Turn it ON as required.
1) Push and hold the RESET button for about
3 seconds. After 3 seconds, three short electric
beeps will be heard to inform you that the Auto
Restart has been selected.
2) To cancel the Auto Restart, follow the steps
described in the section Auto Restart Function of
the Owner’s Manual.
12
Fig. 10-3-3
Page 68
11.HOW TO DIAGNOSE THE TROUBLE
FILE NO. SVM-15036
- 68 -
The pulse modulating circuits are mounted to both indoor and outdoor units.
Therefore, diagnose troubles according to the trouble diagnosis procedure as described below.
(Refer to the check points in servicing written on the wiring diagrams attached to the indoor/outdoor units.)
Table 11-1
No.
1
2
3
4
5
6
7
8
9
Troubleshooting Procedure
First Confirmation
Primary Judgment
Judgment by Flashing LED of Indoor Unit
Self-Diagnosis by Remote Controller
(Check Code)
Judgment of Trouble by Symptom
Trouble Diagnosis by Outdoor LED
Troubleshooting
Inspection of the Main Parts
How to Simply Judge Whether Outdoor
Fan Motor is Good or Bad
Page
94
95
95
96
99
105
113
114
118
NOTE
A large-capacity electrolytic capacitor is used in the
outdoor unit controller (inverter). Therefore, if the
power supply is turned off, charge (charging voltage
DC280V to 373V) remains and discharging takes a lot of
time (for more than 5 minutes). After turning off the
power source, if touching the charging section before
discharging, an electrical shock may be caused.
Discharge the electrolytic capacitor completely by
using solder iron, etc.
WARNING
The electrolytic capacitor may not normally discharge
according to error contents and the voltage may remain.
Therefore, be sure to discharge the capacitor.
WARNING
For discharging, never use a screwdriver and others
for short-circuiting between + and – electrodes,
As the electrolytic capacitor is one with a large
capacity, it is very dangerous because a large electric
spark will occur.
<Discharging method>
Connect the discharge resistance (approx. 100Ω/40W)
or plug of the soldering iron to voltage between +
and – of C13 on the main P.C. board MCC-1571, and
then perform discharging.
Discharge position + and - of C13
(Discharging period: 10 seconds or more)
Fig. 11-1
Page 69
11-1. First Confirmation
FILE NO. SVM-15036
- 69 -
11-1-1. Confirmation of Power Supply
Confirm that the power breaker operates (ON)
normally.
11-1-2. Confirmation of Power Voltage
Confirm that power voltage is AC 220–240 ±10%.
If power voltage is not in this range, the unit may not
operate normally.
Table 11-1-1
11-1-3. Operation Which is not a Trouble
(Program Operation)
For controlling the air conditioner, the program
operations are built in the microcomputer as
described in the following table.
If a claim is made for running operation, check
whether or not it meets to the contents in the
following table.
When it does, we inform you that it is not trouble of
equipment, but it is indispensable for controlling and
maintaining of air conditioner.
No.
1
When power breaker is turned “ON”, the operation
lamp (Green) of the indoor unit flashes.
2
Compressor may not operate even if the room
temperature is within range of compressor-ON.
3
In DRY and SLEEP MODE, FAN (air flow) display
does not change even though FAN (air flow select)
button is operated.
4
Increasing of compressor motor speed stops
approx. 30 seconds after operation started, and
then compressor motor speed increases again
approx. 30 seconds after.
5
The set value of the remote control should be
below the room temperature.
Operation of air conditioner
Description
The OPERATION lamp of the indoor unit flashes when
power source is turned on.
If “START/STOP” button is operated once, flashing
stops. (Flashes also in power failure)
The compressor does not operate while compressor
restart delay timer (3-minutes timer) operates.
The same phenomenon is found after power source has
been turned on because 3-minutes timer operates.
The air flow indication is fixed to [AUTO].
For smooth operation of the compressor, the
compressor motor speed is restricted to Max. 33 rps
for 2 minutes and Max. 57 rps for 2 minutes to
4 minutes, respectively after the operation has started.
If the set value is above the room temperature,
Cooling operation is not performed.
And check whether battery of the remote control is
consumed or not.
6
In AUTO mode, the operation mode is changed.
7
In HEAT mode, the compressor motor speed does
not increase up to the maximum speed or
decreases before the temperature arrives at the
set temperature.
8
Cool, Dry, or Heat operation cannot be performed.
After selecting Cool or Heat mode, select an operation
mode again if the compressor keeps stop status for
15 minutes.
The compressor motor speed may decrease by
high-temp. release control (Release protective
operation by temp.-up of the indoor heat exchanger)
or current release control.
When the unit in other room operates previously in
different mode, Fan Only operation is performed
because of first-push priority control. (Cool operation
and Dry operation can be concurrently performed.)
Page 70
11-2. Primary Judgment
FILE NO. SVM-15036
- 70 -
To diagnose the troubles, use the following methods.
1) Judgment by flashing LED of indoor unit
2) Self-diagnosis by service check remote controller
3) Judgment of trouble by every symptom
Firstly use the method (1) for diagnosis. Then, use the method (2) or (3) to diagnose the details of troubles.
For any trouble occurred at the outdoor unit side, detailed diagnosis is possible by 6-serial LED on the control
P.C. board.
11-3. Judgment by Flashing LED of Indoor Unit
While the indoor unit monitors the operation status of the air conditioner, if the protective circuit operates, the
contents of self-diagnosis are displayed with block on the indoor unit indication section.
Protective circuit operation
for indoor P.C. board
Protective circuit operation
for connecting cable and
serial signal system
Protective circuit operation
for outdoor P.C. board
Protective circuit operation for others
(including compressor)
NOTE
• The contents of items B and C and a part of item E are displayed when air conditioner operates.
• When item B and C, and item B and a part of item E occur concurrently, priority is given to the block of item B.
• The check codes can be confirmed on the remote controller for servicing.
Page 71
11-4. Self-Diagnosis by Remote Controller (Check Code)
FILE NO. SVM-15036
- 71 -
1. If the lamps are indicated as shown B to E in Table 11-3-1, execute the self-diagnosis by the remote controller.
2. When the remote controller is set to the service mode, the indoor controller diagnoses the operation
condition and indicates the information of the self-diagnosis on the display of the remote controller with the
check codes.
If a fault is detected, all lamps on the indoor unit will flash at 5Hz and it will beep for 10 seconds
(beep, beep, beep ... ). The timer lamp usually flashes (5Hz) during self-diagnosis.
11-4-1. How to Use Remote Controller in Service Mode
1
2
Push [CHECK] button with a tip of pencil to set the
remote controller to the service mode.
• “ ” is indicated on the display of the remote
controller.
Push [ON ] or [OFF ] button
If there is no fault with a code, the indoor unit will beep
once (Beep) and the display of the remote controller will
change as follows :
• • •
• The TIMER indicator of the indoor unit flashes continuously.
(5 times per 1 sec.)
• Check the unit with all 52 check codes ( to )
as shown in Table-11-4-1.
• Press [ON ] or [OFF ] button to change the check
code backward.
If there is a fault, the indoor unit will beep for 10
seconds (Beep, Beep, Beep ... ).
Note the check code on the display of the remote
controller.
• 2-digits alphanumeric will be indicated on the display.
• All indicators on the indoor unit will flash.
(5 times per 1 sec.)
Alphanumeric characters are
used for the check codes.
is 5. is 6.
is C. is D.
3
is B. is A.
4
Push [START/STOP] button to release the service mode.
• The display of the remote controller returns to as it
was before service mode was engaged.
Time shortening method.
1. Push SET button while pushing CHECK button.
2. Push [START/STOP] button.
Fig. 11-4-1
Page 72
11-4-2 Caution at Servicing
FILE NO. SVM-15036
- 72 -
1. After using the service mode of remote controller finished, press the [ ] button to reset the remote controller to
normal function.
2. After finished the diagnosis by the remote controller, turn OFF power supply and turn its ON again to reset the air
conditioner to normal operation. However, the check codes are not deleted from memory of the microcomputer.
3. After servicing finished, press [CLR] button of remote controller under service mode status to send code "7F" to the
indoor unit. The check code stored in memory is cleared.
Table 11-4-2
Block distinctionOperation of diagnosis function
Check
code
Block
Indoor P.C.TA sensor ; The roomOperationFlashes when1. Check the sensor TA and connection.
board.temperature sensor iscontinues.error is detected. 2. In case of the sensor and its
Check
code
Cause of operation
short-Circuit or disconnection.connection is normal, check the
TC sensor ; The heatOperationFlashes when1. Check the sensor TC and connection.
exchanger temperaturecontinues.error is detected. 2. In case of the sensor and its
sensor of the indoor unitconnection is normal, check the
is out of place, disconnection,P.C. board.
short-circuit or migration.
Air
conditioner
status
Display flashing
error
Action and Judgment
P.C. board.
Fan motor of the indoor unitAll OFFFlashes when1. Check the fan motor and connection.
is failure, lock-rotor, short-error is detected. 2. In case of the motor and its
circuit, disconnection, etc.connection is normal, check the
Or its circuit on P.C. boardP.C. board.
has problem.
Other trouble on the indoorDepend onDepend onReplace P.C. board.
P.C. board.cause ofcause of
failure.failure.
Page 73
Block distinctionOperation of diagnosis function
FILE NO. SVM-15036
- 73 -
Check
code
Block
Serial signal1) Defective wiring of theIndoor unitFlashes when1) to 3) The outdoor unit never
and connectingconnecting cable oroperateserror is detected.operate.
cable.miss-wiring.continue.Flashing stopCheck connecting cable and correct
Check
code
Cause of operation
2) Operation signal has notOutdoor unit and outdoor unitif defective wiring.
send from the indoor unitstop.start to operateCheck 25A fuse of inverter P.C. board.
when operation start.when the returnCheck 3.15A fuse of inverter
3) Outdoor unit has notsignal from theP.C. board.
send return signal to theoutdoor unit isCheck operation signal of the indoor
indoor unit when operationnormal.unit by using diode. Measure voltage
started.at terminal block of the indoor unit
4) Return signal from thebetween No.2 and No.3 (or L2 and S)
outdoor unit is stop duringIf signal is varied 15-60V continuously,
operation.replace inverter P.C. board.
Some protectorIf signal is not varied, replace indoor
(hardware, if exist) of theP.C. board.
outdoor unit open4) The outdoor unit abnormal stop at
circuit of signal.some time.
Signal circuit of indoorIf the other check codes are found
P.C. board or outdoorconcurrently, check them together.
P.C. board is failureCheck protector (hardware) such
in some period.as Hi-Pressure switch,
Note : Operation signal of the indoor unit shall be measured in the sending period as
picture below.
Sending signal of the indoor unit when have not return
VDC
signal from the outdoor unit.
60
3 minutes Delay, start
counting from power
supply ON or remote
OFF.
*
Voltage variation stop
or have not voltage
output.
3 minutes stop
**
conditioner
***
Air
status
Display flashing
error
Thermal-Relay, etc.
Check refrigerant amount or any
possibility case which may caused
high temperature or high pressure.
Check operation signal of the indoor
unit by using diode. Measure voltage
at terminal block of the indoor unit
between No.2 and No.3 (or L2 and S)
If signal is varied 15-60V continuously,
replace inverter P.C. board.
If signal is not varied, replace indoor
P.C. board.
Action and Judgment
15
Measured signal voltage by apply diode
0
* Signal send only 1 minute and stop. Because of return signal from outdoor unit has not received.
** Signal resend again after 3 minutes stop. And the signal will send continuously.
** * 1 minute after resending, the indoor unit display flashes error.
3478
Time (Min)
Page 74
Block distinctionOperation of diagnosis function
FILE NO. SVM-15036
- 74 -
Check
code
Block
Outdoor P.C.Current on inverter circuitAll OFFFlashes after1. Remove connecting lead wire of the
boardis over limit in short time.error is detectedcompressor, and operate again.
Check
code
Cause of operation
Inverter P.C. board is
failure, IPM shortage, etc.
Compressor current is
higher than limitation,
lock rotor, etc.
Compressor position-detectAll OFFFlashes after1. Remove connecting lead wire of the
circuit error or short-circuiterror is detectedcompressor, and operate again.
between winding of8 times*.2. If outdoor fan does not operate or
compressor.operation but stop after some period,
Air
conditioner
status
Display flashing
error
8 times*.2. If outdoor fan does not operate or
operate but stop after some period,
replace the inverter P.C. board.
3. If outdoor fan operates normally,
measure 3-Phase output of inverter
P.C. board (150-270VAC) at the
connecting lead wire of compressor.
4. If 3-Phase output is abnormal, replace
inverter P.C.Board.
5. If 3-Phase output is normal, replace
compressor. (lock rotor, etc.)
replace the inverter P.C. board.
3. If outdoor fan operates normally,
measure resistance of compressor
winding. If circuit is shortage, replace
the compressor.
Action and Judgment
Current-detect circuit ofAll OFFFlashes afterEven if trying to operate again, all
inverter P.C. board error.error is detectedoperations stop, replace inverter
4 times*.P.C. board.
TE sensor ; The heatAll OFFFlashes after1. Check sensors TE, TS and connection.
exchanger temperatureerror is detected2. In case of the sensors and its
sensor of the outdoor unit4 times*.connection is normal, check the
temperature sensor iserror is detected2. In case of the sensor and its
disconnection or shortage.4 times*.connection is normal, check the
inverter P.C. board.
Outdoor fan failure or itsAll OFFFlashes after1. Check the motor, measure winding
drive-circuit on the invertererror is detectedresistance, shortage or lock rotor.
P.C. board failure.8 times*.2. Check the inverter P.C. board.
TO sensor ; The outdoorOperation Record error1. Check sensors TO and connection.
temperature sensor iscontinues. after detected2. In case of the sensor and its
disconnection or shortage.4 times*.connection is normal, check the
But does notinverter P.C. board.
flash display.
Page 75
Block distinctionOperation of diagnosis function
FILE NO. SVM-15036
- 75 -
Check
code
Block
Check
code
Cause of operation
Compressor drive output error.All OFFFlashes after1. Check installation conditions such as
(Relation of voltage, currenterror is detectedpacked valve opening, refrigerant
and frequency is abnormal)8 times*. amount and power supply (rate +
Overloading operation ofboth of operation and non operation
compressor caused bycondition).
over-charge refrigerant,2. Check P.M.V. by measure the
P.M.V. failure, etc.resistance of the coil and confirm its
Compressor failure (Highoperation (sound of initial
current).operation, etc.)
Air
conditioner
status
Display flashing
error
Action and Judgment
10%,
3. Observe any possibility cause which
may affect operation load of
compressor.
4. Operate again. If compressor
operation is failure when 20 seconds
passed (count time from operation
starting of compressor), replace
compressor.
* 4or 8 times ; When first error is detected, error is count as 1 time, then once operation is stop and re-started.
After re-starting operation within 6 minutes, if same error is detected, error count is add (count become 2 times)
When error count comes 4or 8 times, record error to check code. But after re-starting operation, if no error is
detected and air conditioner can operate more than 6 minutes, error count is cleared.
The othersReturn signal of the outdoorIndoor unitFlashes when1. Check power supply (Rate +
(includingunit has been sent whenoperateserror is detected. 2. If the air conditioner repeat operates
compressor)operation start. But aftercontinue.Flashing stopand stop with interval of approx. 10
that, signal is stop some time.Outdoor unit and outdoor unitto 40 minutes.
Instantaneous powerstop.start to operateCheck protector (hardware) such
failure.when the returnas Hi-Pressure switch,
Some protectorsignal from theThermal-Relay, etc.
(hardware) of theoutdoor unit isCheck refrigerant amount, packed
outdoor unit opennormal.valve opening and any possibility
circuit of signal.cause which may affect high
Signal circuit of indoortemperature or high pressure.
P.C. board or outdoor3. Check operation signal of the indoor
P.C. board is failureunit by using diode. Measure voltage
in some period.at terminal block of the indoor unit
between No.2 and No.3 (or L2 and S)
If signal is varied 15-60V continuously,
replace inverter P.C. board.
If signal is not varied, replace indoor
P.C. board.
10%)
Page 76
Block distinctionOperation of diagnosis function
FILE NO. SVM-15036
- 76 -
Check
code
Block
Check
code
Cause of operation
Compressor does not rotate.All OFFFlashes after1. Remove connecting lead wire of the
Because of missed wiring,error is detectedcompressor, and operate again.
missed phase or shortage.8 times*.2. If outdoor fan does not operate or
Discharge temperature All OFFFlashes after1. Check sensors TD.
o
exceeded 117
C.
Air
conditioner
status
Display
Action and Judgment
flashing error
operation but stop after some period,
replace the inverter P.C. board.
3. If outdoor fan operates normally,
measure 3-Phase output of inverter
P.C. board (150-270VAC) at the
connecting lead wire of compressor.
4. If 3-Phase output is abnormal, replace
inverter P.C.Board.
5. If 3-Phase output is normal, measure
resistance of compressor winding.
6. If winding is shortage, replace the
compressor.
error is detected 2. Check refrigerant amount.
4 times*.3. Check P.M.V. by measure the
resistance of the coil and confirm its
operation (sound of initial
operation, etc.)
4. Observe any possibility cause which
may affect high temperature of
compressor.
Compressor is high currentAll OFFFlashes after1. Check installation conditions such as
though operation Hz iserror is detectedpacked valve opening, refrigerant
decreased to minimum limit.8 times*. amount and power supply (rate +
Installation problem.both of operation and non operation
Instantaneous powercondition).
failure.2. Check P.M.V. by measure the
Refrigeration cycleresistance of the coil and confirm its
problem.operation (sound of initial
Compressor break down.operation, etc.)
Compressor failure (High
current).operation, etc.)
3. Observe any possibility cause which
may affect high current of compressor.
4. If 1, 2 and 3 are normal, replace
compressor.
10%,
Page 77
Block distinctionOperation of diagnosis function
FILE NO. SVM-15036
- 77 -
Check
code
Block
Check
code
Cause of operation
Return signal of the outdoor
unit has been sent when
operation start. But after
that, signal is stop some time.
Instantaneous power
failure.
Some protector
(hardware) of the
outdoor unit open circuit
of signal.
Signal circuit of indoor
P.C. board or outdoor
P.C. board is failure in
some period.
TE, TC high tmperature
TE for cooling operation
TC for heating operation.
Indoor unit Flashes when 1.
Air
conditioner
status
operates
continue.
Outdoor unit
stop.
Display
flashing error
error is detected
11 times*.
Flashing stop
and outdoor unit
start to operate
when the return
signal from the
outdoor unit is
normal.
Action and Judgment
. Check power supply (Rate +10%)
. If the air conditioner repeat operat
2.
and stop with interval of approx. 10
to 40 minutes.
Check protector (hardware) such
as Hi-Pressure switch,
Thermal-Relay, etc.
Check refrigerant amount, packed
valve opening and any possibility
cause which may affect high
temperature or high pressure.
3.
. Check operation signal of the indo
unit by using diode. Measure voltage
at terminal block of the indoor unit
between No.2 and No.3 (or L2 and S)
If signal is varied 15-60V continuously,
replace inverter P.C. board.
If signal is not varied, replace indoor
P.C. board.
4. Check and clean heat exchanger
area Indoor and Outdoor unit.
*
4, 8 or 11 times ; When first error is detected, error is count as 1 time, then once operation is stop and re-started.
After re-starting operation within 6 minutes, if same error is detected, error count is add (count become 2 times)
When error count comes 4, 8 or 11 times, record error to check code. But after re-starting operation, if no error
is detected and air conditioner can operate more than 6 minutes, error count is cleared.
Page 78
11-5. Judgment of Trouble by Symptom
FILE NO. SVM-15036
- 78 -
11-5-1. Wiring Failure (Interconnecting and Serial Signal
Wire)(1) Outdoor unit does not operate
1) Is the voltage between d and e of the indoor terminal block varied?
2) Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon the
following diagram.
NOTE
• Measurement should be performed 2 minutes and 30 seconds after starting of the operation.
• Be sure to prepare a diode for judgment.
Terminal block at indoor side
Red
White
3
2
Terminal block
1
S5277G
S5277G or equivalent (G or J type)
(Diode with rated voltage of 400V
or more is acceptable.)
Tester
Normal time: Voltage swings between DC15 and 60V. ........................ Inverter Assembly check
Abnormal time : Voltage does not vary.
(2) Outdoor unit stops in a little while after operation started
<Check procedure> Select phenomena described below.
1) The outdoor unit stops 10 to 20 minutes after operation started, and 10 minutes or more are required to
restart the unit.
Gas circulation amount is down.
Measure gas pressure.
Thermo. operation of compressor
2) If the unit stops once, it does not operate until the power will be turned on again.
To item of Outdoor unit does not operate.
Gas shortage
Gas leak
Pipe clogging
3) The outdoor unit stops 10 minutes to 1 hour after operation started, and an alarm is displayed.
(Discharge temp. error check code 03, 1E Sensor temp. error check code 02, 1C)
Gas leak
P.M.V. is defective.
Miswiring of connecting wires of indoor/outdoor units
Clogging of pipe and coming-off of TC sensor
Refer to the chart in 11-6.
Page 79
Service Support Function (LED Display, Switch Operation)
FILE NO. SVM-15036
- 79 -
1. Outline
A various setup and operation check can be performed by DIP switches at 2 positions (SW801, SW802)
and the pushdown button switches (SW800) on the outdoor control P.C. board MCC-5071.
Operation part
Part No.
SW800
SW801
SW802
Specifications
Pushdown button switch
DIP switch
DIP switch
Performs the specific operation to check maintenance and various initial settings.
Display part
Part No.
D502, D511, D517, D524, D531
D501, D508, D515, D520, D527
D800
D801 to D805
Specifications
Orange LED
Green LED
Green LED
Red LED
∗ Every LED is colorless when it goes off.
Operation contents
Operation contents
Indoor/Outdoor communication (Serial communication) signal display
(Receive signal from indoor signal)
Indoor/Outdoor communication (Serial communication) signal display
(Send signal from outdoor signal)
(1) Power-ON display
When the power of the outdoor unit is turned on, D800 LED goes on.
(2) Error display
When the outdoor controller detects some errors, some LEDs go on
or flash according to the error as described in Error display table.
(Refer to 11-6)
(3) Specific operation display
When SW800 is pushed and a specific operation is operated, some
LEDs go on or flash.
Control P.C.B MCC-5071
D502, D511, D517, D524, D531 (Orange LED)
: Serial signal (Indoor → Outdoor)
D501, D508, D515, D520, D527 (Green LED)
: Serial signal (Outdoor → Indoor)
SW800,SW801,SW802
: Specific operation switch /
Selection of various initial settings
Page 80
11-6. Trouble Diagnosis by Outdoor LED
FILE NO. SVM-15036
- 80 -
For the outdoor unit, the self-diagnosis is possible by LED (Green) and five LEDs (Red).
∗ LED (Green)(D800) and LEDs (Red)(D801 to D805) are provided on the control P.C. board MCC-5071.
1.
If there is an error, LED (Red or Green) goes on or flashes according to the error as described in the below table.
2. When there are two or more errors, LEDs go on cyclically.
3. Usually, LED (Green)(D800) goes on.
(Legend)
D800 (Green)
D801 (Red)
{
D802 (Red)
z
D803 (Red)
z
D804 (Red)
z
D805 (Red)
z
: Go off, { : Go on, : Flash
z
PMV. : Pulse Motor Valve
LED display
D800D801D802D803D804D805
{
z
zz
z
zzz
z
zz
z
∗1
zzzz
z
zz
z
zzz
z
∗2
z
∗2
z
∗2
z
∗2
zzzzz
∗2
zzz
z
z
z
zz
{
zzzzz
{
{{
{
{{{
{
{{
{
{{{{
{
{{
{{{
{{
{
zzzz
{
zzz
zzz
{
z
{
{{
zz
{
z
z
{{
z
{{
zzz
zz
{
z
z
{{{{
{{{
zzzz
z
zz
{
zzz
{
zzz
zz
zz
zz
zz
{
{
{
{
z
z
z
z
z
z
z
{
{
{
z
z
{
{
{{
zz
{
z
Indoor
check code
—
07
14
16
17
1C
19
1A
1B
1D
1E
1F
18
18
1C
1C
1C
1C
1C
1C
1C
1C
1C
20
20
20
20
20PMV error for E room
21
During normal operation
Case thermo. operation, Power supply error
Driving element short-circuit
Position detection circuit error
Current detection circuit error
Compressor system error, Compressor lock
Discharge temp. sensor (TD) error
Fan system error
Outside temp. sensor (TO) error
Compressor lock
Discharge temp. error, gas leakage
Compressor break down
Suction temp. sensor (TS) error
Heat exchanger temp. sensor (TE) error
A room gas side temp. sensor (TGa) error
B room gas side temp. sensor (TGb) error
C room gas side temp. sensor (TGc) error
D room gas side temp. sensor (TGd) error
E room gas side temp. sensor (TGe) error
Gas leak detection, PMV error
Communication error between MCU
Communication error between MCU
Communication error between MCU
PMV error for A room
PMV error for B room
PMV error for C room
PMV error for D room
High pressure SW system error
Description
∗1: Back-up operation is performed without error display of the indoor unit.
∗2: Operated normally when the air conditioners in other rooms are driven.
Page 81
Check
FILE NO. SVM-15036
- 81 -
code
[07]
Outdoor
LED display
z{zzzz
Check and troubleshooting
(Item without special mention indicates part of outdoor unit.)
[Case thermo operation, Power supply error ]
Is AC mains voltage correct?
(198 to 264V)
YES
Are CN609 of P.C. board MCC-1571
connection and case thermostat correct?
YES
Short each pins of CN609.
Can compressor operate?
YES
Is there gas leak?
Is there refrigerant shortage?
NO
Is service valve fully opened?
YES
Is PMV under correct conditions?
YES
NO
NO
NO
YES
NO
NO
Confirm power supply
construction. etc.
Correct connector.
Case thermostat error → Replace.
Check ourdoor P.C.B MCC-1571.
Defect → Replace.
Repair defective position.
Recharge refrigerant.
Open service valve fully.
Correct defective position.
Replace defective part.
Check crushed or broken pipe.
Defect → Correct and Replace.
[14]
[16]
[17]
zz{zzz
{{
z
zzz
zzz{zz
[Short-circuit of compressor drive element]
compressor lead and reactor correct?
Are connections of
(Check referring to the Wiring diagram.)
YES
Does the same error occur in operation
without compressor lead?
NO
NO
YES
[Position detection circuit error]
Check outdoor P.C.B MCC-1571.
Defect → Replace.
[Current detection circuit error]
Check outdoor P.C.B MCC-1571.
Defect → Replace.
Correct wiring.
Replace outdoor P.C.B MCC-1571.
Check compressor. (Rare short, etc.)
Defect → Replace.
Page 82
Check
FILE NO. SVM-15036
- 82 -
code
[18]
Outdoor
LED display
zzz
{{
Check and troubleshooting
(Item without special mention indicates part of outdoor unit.)
∗ There is a possibility that it is one of the following errors.
Confirm LED on outdoor P.C. board to judge which error it is.
Heat exchanger temp. sensor (TE) error, Suction temp. sensor (TS) error
[Suction temp. sensor (TS) error]
z
[19]
z{z
{{
zz
{{
zz
Is connection of CN603
on P.C.B MCC-5071 correct?
Is resistance value of TS sensor correct?
YES
[Heat exchanger temp. sensor (TE) error]
z
Is connection of CN601
on P.C.B MCC-5071 correct?
Is resistance value of TE sensor correct?
YES
[Discharge temp. sensor (TD) error]
Is connection of CN600
on P.C.B MCC-5071 correct?
Is resistance value of TD sensor correct?
YES
NO
NO
NO
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B MCC-5071
Defect → Replace.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B MCC-5071
Defect → Replace.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B MCC-5071
Defect → Replace.
[1A]
[1B]
{{{
z
zz
zzzz{z
[Fan system error]
Is AC mains voltage correct?
(198 to 264V)
YES
Rotate shaft of the fan motor by hands
during power-OFF, Can it rotate smoothly?
Is coil resistance of fan motor correct?
Between red and white lead wire :12 to 20Ω.
Between white and black lead wire :12 to 20Ω.
Between black and red lead wire :12 to 20Ω.
NO
Replace fan motor.
[Outside temp. sensor (TO) error]
Is connection of CN602
on P.C.B MCC-5071 correct?
Is resistance value of TO sensor correct?
YES
NO
NO
NO
Check wiring construction.
Ask repair of power supply.
Check outdoor P.C.B MCC-1571
Defect → Replace.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B MCC-5071
Defect → Replace.
Page 83
Check
FILE NO. SVM-15036
- 83 -
code
[1C]
Outdoor
LED display
z{z{zz
Check and troubleshooting
(Item without special mention indicates part of outdoor unit.)
∗ There is a possibility that it is one of the following errors.
Confirm LED on outdoor P.C. board to judge which error it is.
Compressor system error, Compressor lock, Gas side temp. sensor (TGa to TGe)
error, Gas leakage, PMV error
[Compressor system error, Compressor lock]
Is AC mains voltage correct?
(198 to 264V)
YES
Is wire connection correct?
Compressor lead
(Board side, Compressor Side),
Reactor lead, Power supply lead.
YES
Is compressor under correct condition?
NO
Is there refrigerant stagnation?
YES
Does PMV correctly operate?
YES
1
NO
NO
YES
Check wiring construction.
Ask repair of power supply.
Check wire connection
and correct it.
1
NO
NO
Compressor lock → Replace.
Check TE, TS sensor and PMV.
Detect → Replace.
.
1
Are the power devices on P.C. board
MCC-1571 screwed without looseness?
(Rear sides of Q201, Q300, Q650, DB01, DB02)
Are radiation grease properly applied?
(Q201)
YES
Apply radiation grease to objective parts.
(Be sure not to forget to attach insulating sheet
between heat sink and Q300, Q650, DB01, DB02)
Does something block
the ventilation around the heat sink?
Does something air flow from the fan?
NO
Check outdoor P.C.B MCC-1571 and MCC-5071.
NO
Retightening of screws.
YES
Remove blocking matter.
Correct short-circuit.
Defect → Replace
Page 84
Check
FILE NO. SVM-15036
- 84 -
code
[1C]
(Continued)
Outdoor
LED display
{{{{
z
z{zzz
Check and troubleshooting
(Item without special mention indicates part of outdoor unit.)
[A room gas side temp. sensor (TGa) error]
z
Is connection of CN604
on P.C.B MCC-5071 correct?
Is resistance value of TGa sensor correct?
YES
[B room gas side temp. sensor (TGb) error]
{
Is connection of CN605
on P.C.B MCC-5071 correct?
Is resistance value of TGb sensor correct?
YES
NO
NO
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B. MCC-5071.
Defect → Replace.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B. MCC-5071.
Defect → Replace.
{{
z
zz
zzzzz
zzz{z
{{{z{
z
[C room gas side temp. sensor (TGc) error]
{
Is connection of CN606
on P.C.B MCC-5071 correct?
Is resistance value of TGc sensor correct?
YES
[D room gas side temp. sensor (TGd) error]
{
Is connection of CN607
on P.C.B MCC-5071 correct?
Is resistance value of TGd sensor correct?
YES
[E room gas side temp. sensor (TGe) error]
{
Is connection of CN608
on P.C.B MCC-5071 correct?
Is resistance value of TGe sensor correct?
YES
[Gas leak detection, PMV error]
Is there gas leak?
Is there refrigerant shortage?
NO
Is service valve fully opened?
YES
Is PMV under correct conditions?
YES
Is there crushed pipe?
NO
Check temp. sensor.
TS, TE, TG, TC
OK
NO
NO
NO
YES
NO
NO
YES
Error
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B. MCC-5071.
Defect → Replace.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B. MCC-5071.
Defect → Replace.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B. MCC-5071.
Defect → Replace.
Repair defective position.
Recharge refrigerant.
Open service valve fully.
Correct defective position.
Replace defective part.
Correct and replace piping.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B. MCC-5071.
Defect → Replace
Page 85
Check
FILE NO. SVM-15036
- 85 -
code
[1C]
(Continued)
Outdoor
LED display
{{z{{
z
z{z
{{{
Check and troubleshooting
(Item without special mention indicates part of outdoor unit.)
[Communication error between MCUs]
Are connections of CN802 on P.C.B MCC-5071
and CN802 on P.C.B MCC-1571 correct?
YES
NO
Correct connection.
Check outdoor P.C. Boards.
Defect → Replace.
[1D]
{{{{
zz
z{zz{z
[Communication error between MCUs]
Are connections of CN804 on P.C.B MCC-5071
and CN800 on P.C.B MCC-1571 correct?
YES
[Compressor lock]
Is AC mains voltage correct?
(198 to 264V)
YES
Is wire connection correct?
Compressor lead
(Board side, Compressor Side),
Reactor lead, Power supply lead.
YES
Is compressor under correct condition?
NO
Is there refrigerant stagnation?
YES
Does PMV correctly operate?
YES
NO
NO
NO
YES
NO
NO
Correct connection.
Check outdoor P.C. Boards.
Defect → Replace.
Check wiring construction.
Ask repair of power supply.
Check wire connection
and correct it.
Check outdoor P.C.B MCC-1571.
Defect → Replace.
Compressor lock → Replace.
Check TE, TS sensors and PMV.
Detect → Replace.
[1E]
zz{z{z
[Discharge temp. error]
Is there gas leak?
Is there refrigerant shortage?
NO
Is PMV under correct conditions?
YES
Does an abnormal overload happen?
NO
Is connection of CN600 on P.C.B. MCC-5071?
Is resistance value of TD sensor correct?
YES
Check outdoor P.C.B MCC-5071.
Defect → Replace.
YES
NO
YES
NO
Repair defective position.
Recharge refrigerant.
Repair defective position.
Replace defective part.
Remove and improve
the cause of overload.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B MCC-5071.
Defect → Replace.
Page 86
Check
FILE NO. SVM-15036
- 86 -
code
[1F]
Outdoor
LED display
{{z{
z
(Item without special mention indicates part of outdoor unit.)
[Compressor break down]
z
Is AC mains voltage correct?
(198 to 264V)
YES
Check and troubleshooting
NO
Check wiring construction.
Ask repair of power supply.
[20]
{
zzzz
Is wire connection correct?
Compressor lead
(Board side, Compressor Side),
Reactor lead, Power supply lead.
YES
Does an abnormal overload happen?
NO
NO
YES
Check wire connection
Check outdoor P.C.B MCC-1571.
∗ There is a possibility that it is one of the following errors.
Confirm LED on outdoor P.C. board to judge which error it is.
PMV error for A room, B room, C room, D room, E room.
[PMV error for A room]
Is PMV under correct conditions?
YES
Check temp. sensor of A room indoor unit?
TA sensor, TC sensor
OK
NO
Error
Repair defective position.
Replace defective part.
Sensor error → Replace.
Check outdoor P.C.B. MCC-5071
and indoor A room P.C. board.
and correct it.
Remove and improve
the cause of overload.
Defect → Replace.
Correct connector.
Defect → Replace.
z{
zzz
zz{zz
[PMV error for B room]
Is PMV under correct conditions?
YES
Check temp. sensor of B room indoor unit?
TA sensor, TC sensor
OK
[PMV error for C room]
Is PMV under correct conditions?
YES
Check temp. sensor of C room indoor unit?
TA sensor, TC sensor
OK
NO
Error
NO
Error
Repair defective position.
Replace defective part.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B. MCC-5071
and indoor B room P.C. board.
Defect → Replace.
Repair defective position.
Replace defective part.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B. MCC-5071
and indoor C room P.C. board.
Defect → Replace.
Page 87
Check
FILE NO. SVM-15036
- 87 -
code
[20]
(Continued)
Outdoor
LED display
zzz{z
(Item without special mention indicates part of outdoor unit.)
[PMV error for D room]
Is PMV under correct conditions?
YES
Check and troubleshooting
NO
Repair defective position.
Replace defective part.
[21]
Error
NO
Error
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B. MCC-5071
and indoor D room P.C. board.
Defect → Replace.
Repair defective position.
Replace defective part.
Correct connector.
Sensor error → Replace.
Check outdoor P.C.B. MCC-5071
and indoor E room P.C. board.
Defect → Replace.
zzzz
Check temp. sensor of D room indoor unit?
[PMV error for E room]
{
Is PMV under correct conditions?
Check temp. sensor of E room indoor unit?
TA sensor, TC sensor
OK
YES
TA sensor, TC sensor
OK
∗ There is a possibility that it is one of the following errors.
Confirm LED on outdoor P.C. board to judge which error it is. (1) high-pressure SW system error,
(2) power supply error (Vdc), (3) high-pressure protective operation, (4) case thermo operation.
[High pressure SW system error]
{{{{
z
{
High pressure protective operation.
Doesn’t high pressure switch
high pressure switch normal?
Is service valve fully opened?
Reset the power supply and
then do a trial operation according
which blocks heat exchanger
operate?
YES
Are parts of
YES
YES
to the season.
B Cooling operation.
Does cooling outdoor fan
normally operate?
YESYES
Is there any element
of the outdoor unit?
Clogging of heat exchanger
Short circuit
NO
NO
Is circuit wiring normal?
NO
NO
B ← Cooling operation
C ← Heating operation
NO
YES
Parts check
Defective → Replace
Open service valve fully.
Is there no fan breakage
or coming-off?
NO
Wiring check,
Correct.
YES
Check IPDU PC board
Defective → Replace
NO
Repair defective position.
Connection of connectors,
IPDU, Fan motor, Wiring.
Elimination of
blocking element
Overcharge of refrigerant/
Clogging/Pipe breakage/
Abnormal overload
Page 88
Check
FILE NO. SVM-15036
- 88 -
code
[21]
(Continued)
Outdoor
LED display
Check and troubleshooting
(Item without special mention indicates part of outdoor unit.)
C
Heating operation
Does the heating indoor fan
normally operate?
YES
Is there any element which
blocks indoor heat exchanger?
Filter clogging
Clogging of heat exchanger
Short circuit
NO
Clogging by refrigerant
overcharge/Pipe breakage/
Abnormal overload
Check indoor P.C. board
Defective → Replace
NONO
YES
blocking element
Are connections of
connectors,capacitors
and fan motor normal?
YES
Elimination of
Are characteristics
of TC and TCJ sensor
resistance value normal?
YES
defective position.
Replace
TC or TCJ sensor.
Repair
NO
Page 89
11-6. TROUBLESHOOTING
FILE NO. SVM-15036
- 89 -
RAS-5M34S3AV-A
1. Before Troubleshooting
Each model corresponds to DRED (Demand response enabling device) by AS/NZS 4755.3.1.
DRM1, DRM2 and DRM3 are executed as follows, upon directions from the power company,
Be sure to confirm they are not operated before usually troubleshooting.
Air conditioner demand response
Demand response mode
DRM1
DRM2
DRM3
Description
Compressor off
E30m ≤ R × 0.50 × 0.5
E30m ≤ R × 0.75 × 0.5
*1: E30m = total electrical energy (kWh) used by the all conditioner for all purposes (including compressors,
controls and fans) over a 30 min period.
*2: R = rated input electrical power of the air conditioner (kW) at rated capacity in the mode in which it is
operating during the demand response event (i.e. cooling or heating).
2. Troubleshooting Procedure
When a symptom such as the following table is found without a check code is not displayed on the remote
controller, there is a possibility that a demand operation or demand P.C. board is failed, therefore diagnose it
according to the following diagram.
No.Operating conditions of air conditioner
Each condition is within the operating condition,
1
but the compressor does not work.
2Cooling/Heating of the room is poor
Diagnosis when compressor does not workDiagnosis when cooling/heating is poor
Disconnect the
connecting wiring
of DRED.
Compressor works.
NO
LED of the demand
P.C. board is on.
YES
Remove wiring of
CN105 on DRED
P.C. board.
YES
NO
Normal
(Demand operation)
or DRED is failed.
Demand
P.C. board is failed.
Refer to next page
∗
Disconnect the
connecting wiring
of DRED.
Cooling/heating
improved.
NO
Abnormal cycle
system, etc. *1
YES
(Demand operation)
or DRED is failed.
Normal
Compressor works.
YES
Exchange of
Demand P.C. board
NO
Indoor unit
satisfies ON conditions
of the compressor.
NO
Indoor thermostat
is off.
YES
When a failure with *1 appears,
advance the diagnosis further according
to the basic service manual.
Inverter Ass’y
is failed *1
Page 90
Troubleshooting for Demand Unit
FILE NO. SVM-15036
- 90 -
Demand
P.C. board
is failed.
Fuse
F100 is melted.
NO
Exchange of transformer,
YES
exchange of Demand
P.C. board
Take off wiring of
CN102. Short-circuit is
found between “~” and
“~” of DB100.
NO
Short-circuit is
found between 1 and 2
pins of connector connected to
CN102 of
transformer.
NO
Exchange of
Demand
P.C. board
YES
YES
Exchange of transformer,
exchange of Demand
P.C. board
Exchange of transformer
Page 91
11-7. Inspection of the Main Parts
FILE NO. SVM-15036
- 91 -
[1] Sensor characteristic table
100
90
80
70
60
50
40
30
Resistance value (kΩ)
20
10
0
0102030 4050
11-8. Outdoor Unit
No.
1
Compressor
(Model : DA270A2T-20LD)
Part name
TD
TO, TE, TS, TGa to TGe
Temperature (˚C)
Measure the resistance value of each winding by using the tester.
pipe temperature sensor
(TGa, TGb, TGc, TGd, TGe),
discharge temperature sensor (TD),
suction temperature sensor (TS),
evaporator temperature sensor
(TE),
Measure the resistance value of winding by using the tester.
Red
WhiteBlack
Position
Red - White
White - Black
Black - Red
For details, refer to Section 11-10.
Resistance value
17.3 ± 1.7Ω
Check conduction by using the tester.
Check conduction by using the tester.
Disconnect the connector, and measure resistance value with the tester.
(Normal temperature)
Sensor
Temperature
TD (kΩ)
TO, TE, TS (kΩ)
TGa to TGe (kΩ)
10°C20°C25°C40°C50°C
10564512718
20.612.610.05.13.4
20.012.510.05.33.6
Page 92
11-9. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad
FILE NO. SVM-15036
- 92 -
1. Symptom
• Outdoor fan motor does not rotate.
• Outdoor fan motor stops within several tens seconds though it started rotating.
• Outdoor fan motor rotates or does not rotate according to the position where the fan stopped, etc.
Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”
2. Cause
The following causes are considered when the outdoor fan motor does not normally rotate.
1) Mechanical lock of the outdoor fan motor
2) Winding error of the outdoor fan motor
Position-detect circuit error inside of the outdoor fan motor
3)
4) Motor drive circuit error of the outdoor P.C. board
3. How to simply judge whether outdoor fan motor is good or bad
Turn OFF the breaker.
Disconnect connector of the outdoor fan motor
from P.C. board, MCC-1436.
Does the fan rotate without trouble
when rotating it with hands?
YES
If the resistance value between
1 (Red lead)– 2 (White lead)
2 (White lead) – 3 (Black lead)
3 (Black lead) – 1 (Red lead)
of the connector
(CN300 : Motor winding)
is 13.3 to 16.3Ω, it is normal.
YES
Fan motor is normal.
(Outdoor P.C. board error)
NO
NO
Fan motor error
NOTE
However, GND circuit error inside of the motor may be accepted in some cases when the above check is
performed.
When the fan motor does not become normal even if P.C. board is replaced, replace the outdoor fan motor.
Page 93
<MCC-1571>
FILE NO. SVM-15036
- 93 -
Electrolytic capacitors
(760µF/400V)
Compressor
Compressor
Compressor
output terminals
output terminalsoutput terminals
CN200
CN200CN200
CN201
CN201CN201
CN202
CN202CN202
Lead wire for grounding
P09 (Black)
Fan motor output
Fan motor outputFan motor output
CN300
CN300CN300
(Red, White, Black)
(Red, White, Black)(Red, White, Black)
Power supply protective fuse
F01 (250V, 25A)
Power supply
connecting lead wire
P01 (Red)
P02 (White)
Reactor connecting
connectors
Power supply circuit protective fuse
Power supply circuit protective fuse
F100
F100
(250V, 3.15A plastic case)
(250V, 3.15A plastic case)
Case thermo connector
CN609 (Blue)
Lead wire for High pressure
switch connecting connector
CN690 (Black)
5) Cut the bundling band that binds the PMV coil and
the relay lead wire.
6)
Remove the connectors, relay connector and the
lead wire that are connected from IPDU P.C. board
to the other parts.
CN701 : 4-way valve c
Relay connector for reactor to mount the partition
plate (2P: White)
CN609 : Compressor case thermo. (2P: White)
CN690 : Relay connector for High pressure
switch (2P: White)
7) Remove connectors that are connected from the
fan motor to the fan motor relay P.C. board.
• Unlock the lock of the housing unit and then
remove the connectors.
oil (2P, White)
Inverter fixed board
Valve fixing board
CDB P.C. board
Temperature sensor
IPDU P.C. board
Fixing
screw
Fixing screw
PMV coil
Bundling band
4-way coil
Fan motor relay connector
Page 98
Inverter box side
Black
No.4Part name
FILE NO. SVM-15036
- 98 -
Procedure
Remarks
Inverter
assembly
(Continued)
8) Remove the soundproof plate (upper).
9) Remove the terminal cover of the compressor
and then remove the compressor lead of the
compressor.
10) Pull up the inverter assembly and then remove it.
Reactor cover side
Inverter box side
Inverter box side
Soundproof plate (upper)
Compressor leadCase thermo
Black
Black
∗ Hold up both the reactor cover side and the
inverter box side and then remove the inverter
assembly upward.
∗ Caution to mount the inverter assembly
When mounting the inverter assembly to the
partition plate, be sure to do hooking.
Partition cover
NOTE)
Using the bundling band on the market, be sure
to bind the portions which were bound before.
WhiteRed
Hook
Page 99
No.
FILE NO. SVM-15036
- 99 -
Part name
Procedure
Remarks
5
CDB P.C.
board
1) Perform works of Detachment 1 of 1 and 4)
4
of
.
CAUTION
Never disassemble the inverter until 5 minutes
after the power supply was turned off because
there is a fear that an electric shock may occur.
2) Remove the connector and the relay connector
that are connected from CDB P.C. board to
IPDU P.C. board, power supply and the inter-
unit wire.
CN802: UART (5P, Blue)
CN804: UART (5P, White)
CN01: Power supply (3P, Red)
Terminal relay connector (6P, White)
∗ Unlock the lock of the housing unit and
then remove the connectors.
3) Remove the earth wire of CDB P.C. board
(Truss head B tight Ø4 × 6, 1 pc.)
4) Remove CDB P.C. board from CDB fixed
board.
5) Mount a new CDB P.C. board.
∗ When connecting the connectors on CDB
P.C. board to support CDB fixed board with
hand.
Power supply
connector
CDB P.C. board
UART
(CN804)
CDB fixed board
Earth screw
Terminal relay
connector
UART
(CN802)
6
IPDU
P.C. board
1) Perform works of Detachment 1 of 1 , 3) of
, 4 and 2), 3) of 5 .
2
CAUTION
Never disassemble the inverter until 5 minutes
after the power supply was turned off because
there is a fear that an electric shock may occur.
2) Take off screw for CDB fixed board and the
inverter box. (ST1T Ø4 × 8, 1 pc.)
3) Remove CDB P.C. board assembly.
4)
Remove the connectors connected to IPDU
P.C. board. (4-way valve coil, compressor
case thermo, UART × 2, Inter-unit wire)
5)
Remove the relay connector for fan
motor, reac
6) Remove the lead wire connected to IPDU
P.C. board.
(Tightening torque: 1.47 ± 0.1 N•m)
Compressor lead
Remove the power supply cable from the
power supply terminal block.
Power supply lead L: Red
Power supply lead N: White
tor, and High pressure switch.
U : CN200, Red
V : CN201, White
W : CN202, Black
Reactor relay connector
Compressor
lead
Compressor
case thermo
High pressure switch relay connector
IPDU
P.C. board
UART
Power supply terminal block
4-way
valve coil
Fan motor
relay connector
Page 100
g
No.6Part name
FILE NO. SVM-15036
- 100 -
IPDU P.C.
board
(Continued)
Procedure
7)
Remove the earth wire of IPDU P.C. board.
(Truss head B tight screw Ø4 × 6, 1 pc.).
8)
e off fixing screws for IPDU P.C.
Tak
(Flange nut to fix element Ø3 × 16, 7 pcs.: Pan
head S tight scre
Ø3 × 20, 1 pc.)
9)
Remove IPDU P.C. board. (3 supporters)
w to fix P.C.
board
board.
NOTE)
Be careful that IPDU P.C. board is difficult to be
taken out by radiating grease for the heat sink.
10)
Mount a new IPDU P.C. board.
NOTE)
• Take note that the compressor lead V:
CN201 (white) and the reactor lead CN05,
CN06 are correctly attached.
(For the compressor lead, the transparent
sleeve is attached to the circular terminal,
and for the reactor lead, the transparent
sleeve is not attached to the circular terminal.)
• Be sure not to forget to attach the Sub heat
sink and also the rediating sheet.
(If you apply a little amount of radiating
grease beforehand to the rear side of the
insulation sheet, the attaching work to the
heat sink will become easy.)
Remarks
Fixing screws
for element
(7 positions)
IPDU P.C. board
fixing screw
IPDU P.C. board
Earth screw
Supporters
(3 positions)
Radiating grease
Sub heat sinkRediatin
sheet
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