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Air-Conditioners For Building Application
OUTDOOR UNIT
PUHY-TM
PUY-TM
FOR INSTALLER
INSTALLATION MANUAL
For safe and correct use, please read this installation manual thoroughly before installing the air-conditioner unit.
∗ Remote controller (PAR-F25MA) is available as an optional remote controller.
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Contents
1. Safety precautions ...................................................................... 4
1.1. Before installation and electric work ............................... 4
1.2. Before getting installed ................................................... 4
1.3. Before getting installed (moved) - electrical work........... 5
1.4. Before starting the test run ............................................. 5
2. Combination with indoor units..................................................... 6
3. Confirmation of parts attached ................................................... 6
4. Selection of installation site ........................................................ 7
5. Space required around unit ........................................................ 7
5.1. Individual installation ...................................................... 7
5.2. Collective installation and continuous installation........... 8
6. Lifting method and weight of product.......................................... 9
7. Installation of unit........................................................................ 9
7.1. Location of anchor bolt ................................................... 9
7.2. Installation .................................................................... 10
7.3. Connecting direction for refrigerant piping.................... 11
7.4. Noise level .................................................................... 11
8. Caution for snow and seasonal wind ........................................ 12
8.1. Snow and seasonal wind.............................................. 12
8.2. Countermeasure to seasonal wind ............................... 12
9. Refrigerant piping installation ................................................... 12
9.1. Areas of caution............................................................ 13
9.2. Refrigerant piping system............................................. 14
9.3. Caution for piping connection/valve operation .............. 17
9.4. How to install branch pipe ............................................ 18
9.5. Airtight test and evacuation .......................................... 20
9.6. Thermal insulation of refrigerant piping ........................ 21
10.Electrical work ......................................................................... 23
10.1. Caution........................................................................ 23
10.2. Control box and connecting position of wiring............. 24
10.3. Wiring transmission cables ......................................... 25
10.4. Wiring of main power supply and equipment
capacity ....................................................................... 30
11.Test run.................................................................................... 31
11.1. Checking before getting test run ................................. 31
11.2. Test run method .......................................................... 31
11.3. How to cope with test run trouble................................ 32
11.4. Coping with remote controller trouble ......................... 34
11.5. The following phenomena do not represent trouble
(emergency) ................................................................ 35
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1. Safety precautions
1.1. Before installation and electric work
s Before installing the unit, make sure you read all the
“Safety precautions”.
s The “Safety precautions” provide very important points
regarding safety. Make sure you follow them.
Symbols used in the text
Warning:
Describes precautions that should be observed to prevent danger
of injury or death to the user.
Caution:
Describes precautions that should be observed to prevent damage
to the unit.
Symbols used in the illustrations
: Indicates an action that must be avoided.
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: Indicates that caution should be taken with rotating parts. (This
symbol is displayed on the main unit label.) <Color: Yellow>
: Indicates that the main switch must be turned off before servicing.
(This symbol is displayed on the main unit label.) <Color: Blue>
: Beware of electric shock (This symbol is displayed on the main
unit label.) <Color: Yellow>
: Beware of hot surface (This symbol is displayed on the main unit
label.) <Color: Yellow>
: Please pay attention to electric shock fully because this is
ELV
not Safety Extra Low-Voltage (SELV) circuit.
And at servicing, please shut down the power supply for both
of Indoor Unit and Outdoor Unit.
Warning:
Carefully read the labels affixed to the main unit.
• Do not touch the heat exchanger fins.
- Improper handling may result in injury.
• If refrigerant gas leaks during installation work, ventilate the
room.
- If the refrigerant gas comes into contact with a flame, poisonous
gases will be released.
• Install the air conditioner according to this Installation Manual.
- If the unit is installed improperly, water leakage, electric shock, or
fire may result.
• Have all electric work done by a licensed electrician according
to “Electric Facility Engineering Standard” and “Interior Wire
Regulations”and the instructions given in this manual and always use a special circuit.
- If the power source capacity is inadequate or electric work is per-
formed improperly, electric shock and fire may result.
• Securely install the cover of control box and the panel.
- If the cov er and panel are not installed properly, dust or water may
enter the outdoor unit and fire or electric shock may result.
• When installing and moving the air conditioner to another site,
do not charge the it with a refrigerant different from the refrigerant (R22) specified on the unit.
- If a different refrigerant or air is mixed with the original refrigerant,
the refrigerant cycle may malfunction and the unit may be damaged.
• If the air conditioner is installed in a small room, measures must
be taken to prevent the refrigerant concentration from exceeding the safety limit even if the refrigerant should leak.
- Consult the dealer regarding the appropriate measures to prevent
the safety limit from being exceeded. Should the refrigerant leak
and cause the safety limit to be exceeded, hazards due to lack of
oxygen in the room could result.
• When moving and reinstalling the air conditioner, consult the
dealer or an authorized technician.
- If the air conditioner is installed improperly, water leakage, electric
shock, or fire may result.
• After completing installation work, make sure that refrigerant
gas is not leaking.
- If the refrigerant gas leaks and is exposed to a fan heater, stove,
oven, or other heat source, it may generate noxious gases.
• Do not reconstruct or change the settings of the protection devices.
- If the pressure switch, thermal switch, or other protection device is
shorted and operated forcibly, or parts other than those specified
by Mitsubishi Electric are used, fire or explosion may result.
Warning:
• Ask the dealer or an authorized technician to install the air conditioner.
- Improper installation by the user ma y result in water leakage, elec-
tric shock, or fire.
• Install the air unit at a place that can withstand its weight.
- Inadequate strength may cause the unit to fall down, resulting in
injuries.
• Use the specified cables for wiring. Make the connections securely so that the outside force of the cable is not applied to the
terminals.
- Inadequate connection and fastening may generate heat and cause
a fire.
• Prepare for typhoons and other strong winds and earthquakes
and install the unit at the specified place.
- Improper installation may cause the unit to topple and result in in-
jury.
• Always use an air cleaner, humidifier, electric heater, and other
accessories specified by Mitsubishi Electric.
- Ask an authorized technician to install the accessories. Improper
installation by the user may result in water leakage, electric shock,
or fire.
• Never repair the unit. If the air conditioner must be repaired,
consult the dealer.
- If the unit is repaired improperly, water leakage, electric shock, or
fire may result.
1.2. Before getting installed
Caution:
• Do not install the unit where combustible gas may leak.
- If the gas leaks and accumulates around the unit, an explosion
may result.
• Do not use the air conditioner where food, pets, plants, precision instruments, or artwork are kept.
- The quality of the food, etc. may deteriorate.
• Do not use the air conditioner in special environments.
- Oil, steam, sulfuric smoke, etc. can significantly reduce the per-
formance of the air conditioner or damage its parts.
• When installing the unit in a hospital, communication station,
or similar place, provide sufficient protection against noise.
- The inverter equipment, private power generator, high-frequency
medical equipment, or radio communication equipment may cause
the air conditioner to operate erroneously , or f ail to operate . On the
other hand, the air conditioner may affect such equipment by creating noise that disturbs medical treatment or image broadcasting.
• Do not install the unit on a structure that may cause leakage.
- When the room humidity exceeds 80% or when the drain pipe is
clogged, condensation may drip from the indoor unit. Perform collective drainage work together with the outdoor unit, as required.
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1.3. Before getting installed (moved) electrical work
Caution:
• Ground the unit.
- Do not connect the ground wire to gas or water pipes, lightning
rods, or telephone ground lines. Improper grounding may result in
electric shock.
• Install the power cable so that tension is not applied to the cable.
- Tension may cause the cable to break and generate heat and cause
a fire.
• Install an leak circuit breaker, as required.
- If an leak circuit breaker is not installed, electric shock may result.
• Use power line cables of sufficient current carrying capacity
and rating.
- Cables that are too small may leak, generate heat, and cause a
fire.
• Use only a circuit breaker and fuse of the specified capacity.
- A fuse or circuit breaker of a larger capacity or a steel or copper
wire may result in a general unit failure or fire.
• Do not wash the air conditioner units.
- Washing them may cause an electric shock.
• Be careful that the installation base is not damaged by long use.
- If the damage is left uncorrected, the unit may fall and cause per-
sonal injury or property damage.
• Install the drain piping according to this Installation Manual to
ensure proper drainage. Wrap thermal insulation around the
pipes to prevent condensation.
- Improper drain piping may cause water leakage and damage to
furniture and other possessions.
• Be very careful about product transportation.
- Only one person should not carry the product if it weighs more than
20 kg.
- Some products use PP bands for packaging. Do not use any PP
bands for a means of transportation. It is dangerous.
- Do not touch the heat exchanger fins. Doing so may cut your fin-
gers.
- When transporting the outdoor unit, suspend it at the specified po-
sitions on the unit base. Also support the outdoor unit at four points
so that it cannot slip sideways.
• Safely dispose of the packing materials.
- Packing materials, such as nails and other metal or wooden parts,
may cause stabs or other injuries.
- Tear apart and throw away plastic packaging bags so that children
will not play with them. If children play with a plastic bag which w as
not torn apart, they face the risk of suffocation.
1.4. Before starting the test run
Caution:
• Turn on the power at least 12 hours before starting operation.
- Starting operation immediately after turning on the main power
switch can result in severe damage to internal parts. K eep the power
switch turned on during the operational season.
• Do not touch the switches with wet fingers.
- Touching a switch with wet fingers can cause electric shock.
• Do not touch the refrigerant pipes during and immediately after
operation.
- During and immediately after operation, the refrigerant pipes are
may be hot and may be cold, depending on the condition of the
refrigerant flowing through the refrigerant piping, compressor, and
other refrigerant cycle parts. Your hands may suffer burns or frostbite if you touch the refrigerant pipes.
• Do not operate the air conditioner with the panels and guards
removed.
- Rotating, hot, or high-voltage parts can cause injuries.
• Do not turn off the power immediately after stopping operation.
- Always w ait at least five minutes before turning off the power. Oth-
erwise, water leakage and trouble may occur.
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2. Combination with indoor units
The indoor units connectable to this unit are shown below.
Outdoor unit model
name
PUHY-200
PUY-200
PUHY-250
PUY-250
Note:
1. The total capacity of connected indoor unit models represents the total sum of the figures expressed in the indoor model name.
2. Combinations in which the total capacity of the connected indoor units exceeds the capacity of the outdoor unit will reduce the capacity
of each indoor unit below the rated capacity during simultaneous operation. Therefore, if circumstances allows, combine indoor units
within the capacity of the outdoor unit
Total capacity of
connected indoor unit
models
100 to 260
125 to 325
Quantity of connectable
indoor unit
1 to 13
1 to 16
Model name of connectable indoor unit
PLFY- 32 · 40 · 100 · 125 VGM
PLFY- 50 · 63 · 80 NGM
PLFY- 20 · 25 · 32 · 40 · 50 · 63 · 80 · 100 · 125 NLMD
PEFY-20 · 25 · 32 · 40 · 50 · 63 · 80 · 100 · 125 NM
PKFY-20 · 25 NAM
PKFY-32 · 40 · 50 NFM
PCFY- 40 · 63 · 100 · 125 VGM
3. Confirmation of parts attached
This outdoor unit is attached with the parts below. Please check the quantity for each item.
Name 1 Wire mounting plate 2 Conduit mounting plate 3 Conduit mounting plate 4 Conduit mounting plate
Ø40
Shape
Ø33
Ø27
PUHY-200
PUY-200
PUHY-250
Model name
Model name
PUY-250
PUHY-200
PUY-200
PUHY-250
PUY-250
1111
1111
Name 5 Tapping screw M4 × 12 6 Connecting pipe 7 Packing
Shape
inside ø23 outside ø35
611
611
*6 Connecting pipe is fixed with the unit.
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4. Selection of installation site
Select space for installing outdoor unit, which will meet the following
conditions:
• no direct thermal radiation from other heat sources
• no possibility of annoying neighbors by noise from unit
• no exposition to strong wind
• with strength which bears weight of unit
• note that drain flows out of unit when heating
• with space for air passage and service work shown below
Because of the possibility of fire, do not install unit to the space where
generation, inflow, stagnation, and leak of combustible gas is expected.
• Avoid unit installation in a place where acidic solution and spra y (sulfur)
are often used.
• When having cooling operation at an outside air temperature of below 10°C, in order to obtain steady operation of unit, select an installation site not exposed directly to rain and snow, or install air outlet
and inlet ducts. (Refer to Page 12.) Install the outdoor unit at the
same position on the same floor, or above, the indoor unit. (See the
figure at the right.)
• Do not use unit in any special environment where oil, steam and
sulfuric gas exist.
5. Space required around unit
Installation restriction on outdoor unit when cooling operation is performed
when the outdoor air temperature is 10°C or lower
A
(Same floor as indoor unit, or floor above)
A 4 m or less
5.1. Individual installation
Basic space required
A space of at least 250 mm is necessary at the back for inlet air. Taking
servicing, etc. from the rear into account, a space of about 450 mm
should be provided, the same as at the front.
D
A
FE
B
C
<Top view> <Side view>
A 250 mm or more
B 450 mm or more
C Front (outside of machine room)
D Top discharge (open in principle)
E Front inlet (open in principle)
F Rear inlet (open in principle)
When inlet air enters from right and left sides of unit
B
C
A
C
A
B
Hh
D
<Side view>
A L
1 or more
B L2 or more
C Front
D No restrictions on wall height (left and right)
Note:
• Wall heights (H) of the front and the back sides shall be within
overall height of unit.
• When the total height is exceeded, add the “h” dimension of the
figure above to L1 and L2 in the table above.
Model L1 L2
PUHY-200
PUHY-250
PUY-200
PUY-250
450 250
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When unit is surrounded by walls
B
A
D
Hh
A
C
650
B
325
E
h
H
5.2. Collective installation and continuous installation
Space required for collective installation and continuous installation:
When installing several units, leave the space between each block as
shown below considering passage for air and people.
B
*E
C
<Side view>
A L
1 or more
2 or more
B L
C Front
D Front panel
E Rear panel
Note:
• Wall heights (H) of the front and the back sides shall be within
overall height of unit.
• If the panel height is exceeded, add the “h” dimension of the
figure above to L1 and L2 in the table above.
Model L1 L2
PUHY-200
PUHY-250
PUY-200
PUY-250
Example: When h is 100
The L1 dimension becomes 450+100=550 mm.
When there is an obstruction above the unit
450 250
A
C
B
AA
CC
D
B
CCCCC
*FF F F F*E
A
B
*F
B
A
A
B
B
D
B
E
E
GCC
E
A
A
C
CG
D
A 45° or more
B 300 mm or more
C 1000 mm or more
D Air outlet guide (Procured at the site)
When there is little space
up to an obstruction
DD
A
CCHC
A (Must be open)
B Wall height (H)
C Front
D 1000 mm or more
E 250 mm or more
F 450 mm or more
G 900 mm or more
H No restrictions on wall height
Note:
• Open in the two directions
• In case wall height (H) exceeds overall height of unit, add “h”
dimension (h=wall height <H> – overall height of unit) to * marked
dimension.
• If there is a wall at both the front and the rear of the unit, install
up to four units consecutively in the side direction and provide
a space of 1000 mm or more as inlet space/passage space for
each four units.
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6. Lifting method and weight of product
• When carrying the unit suspended, pass the ropes under the unit
and use the two suspension points each at the front and rear.
• Always lift the unit with ropes attached at four points so that impact is
not applied to the unit.
• Attach the ropes to the unit at an angle of 40° or less.
• Use two ropes at least 7 m long.
A
B
A 40° or less
B Rope suspension part
Dangerous!
Weight of product:
PUHY-200 PUHY-250 PUY-200 PUY-250
225 kg 240 kg 220 kg 235 kg
Caution:
Be very careful to carry product.
- Do not have only one person to carry product if it is more than 20 kg.
- PP bands are used to pack some products. Do not use them as a
mean for transportation because they are dangerous.
- Do not touch heat exchanger fins with y our bare hands. Otherwise you
may get a cut in your hands.
- Tear plastic packaging bag and scrap it so that children cannot play
with it. Otherwise plastic packaging bag ma y suffocate children to death.
- When carrying in outdoor unit, be sure to support it at four points. Carrying in and lifting with 3-point suppor t may make outdoor unit unstable, resulting in a fall of it.
7. Installation of unit
7.1. Location of anchor bolt
• Individual installation • Example of collective installation
880±5
*560±2
0
8
8
C
*560±2
A
For collective installation, provide a 10 mm gap between units.
B
560
760
D
10
440
*560±2 *560±2
10
440
880±5
A (Service side)
B Unit
C (Compatible with old models)
D Installation foot
The dimension (560) indicated by the * can also handle 760 mm, taking interchange with old models into account. How ever , handle the depth dimension
(800) at the site.
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7.2. Installation
;;
26 160 29
38 80
560
B
760
C
990
D
57
ø40
ø27
75 136
105
840 E
880 B
15
910
5555
A
F
• Fix unit tightly with bolts as shown below so that unit will not fall down
due to earthquake or gust.
• Use concrete or angle for foundation of unit.
• Vibration may be transmitted to the installation section and noise
and vibration may be generated from the floor and walls, depending
on the installation conditions. Therefore, provide ample
vibrationproofing (cushion pads, cushion frame, etc.).
A
Down piping and down wiring precautions
When down piping and down wiring are performed, be sure that foundation and base work does not block the base through holes. When down
piping is performed, make the foundation at least 100 mm high so that
the piping can pass under the bottom of the unit.
880±5
B
C
D
E
A Be sure that the corners are firmly seated. If the corners are not firmly
seated, the installation feet may be bent.
B M10 anchor bolt procured at the site.
C Corner is not seated.
D Unit
(Provide ample vibrationproofing between the unit and the foundation by
using cushion pads, cushion frame, etc.)
E Piping and wiring space (Bottom piping, bottom wiring)
F Concrete foundation
F
The foundation and frame work shown below block the through holes
and bottom piping and bottom wiring cannot performed.
H
G
A Bottom piping through hole
B (bolt hole)
C (bolt hole for old models)
D (unit width)
E (unit depth)
F Bottom wiring through hole
G Foundation
H Unit base
H
G
• Be sure to install unit in a place strong enough to withstand its
• Have installation work in order to protect against a str ong wind
When building the foundation, give full attention to the floor strength,
drain water disposal <during operation, drain water flows out of the unit>,
and piping and wiring routes.
Warning:
weight.
Any lack of strength may cause unit to fall down, resulting in a
personal injury.
and earthquake.
Any installation deficiency may cause unit to fall down, resulting in a personal injury.
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7.3. Connecting direction for refrigerant
piping
Three connecting directions are available for refrigerant piping of the
outdoor unit: bottom piping and front piping and left piping.
as shown below:
When performing rear piping, use the rear piping kit sold separately.
However, when the units are installed collectively and consecutively, left
side piping is not available in case that another unit is installed to the left.
A
B
C
A Knock-out hole
B Left piping
C Bottom piping
D Front piping
Note:
In the case of bottom piping, build a 100 mm or higher foundation
so that piping will go through the bottom of the unit.
D
7.4. Noise level
PUHY-200 PUHY-250
PUY-200 PUY-250
56 dB(A) 57 dB(A)
1m
A
1m
B
A Front
B Measuring point
Measuring location: a room free from echoes and reverberations
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8. Caution for snow and seasonal wind
AA
In cold and/or snowy areas, sufficient countermeasures to wind and snow
damages should be taken for operating unit in normal and good condition in winter time. Ev en in the other areas, full consider ation is required
for installation of unit in order to prevent abnormal operations caused by
seasonal wind or snow. When rain and snow directly fall on unit in
the case of air-conditioning operations in 10 or less degrees centigrade outdoor air, mount inlet and outlet ducts on unit for assuring
stable operations.
8.1. Snow and seasonal wind
■ Prevention of wind and snow damages in cold or snowy areas:
Refer to the figure of snow hood shown below:
• Snow hood
1093
A
1145
888
Note:
1. Height of frame base for snow damage prevention (H) shall be
twice as high as expected snowfall. Width of frame base shall
not exceed that of the unit. The frame base shall be made of
angle steel, etc., and designed so that snow and wind slip through
the structure. (If frame base is too wide, snow will be accumulated on it.)
2. Install unit so that seasonal wind will not directly lash against
openings of inlet and outlet ducts.
3. Build frame base at customer referring to this figure.
Material : Galvanized steel plate 1.2T
Painting : Overall painting with polyester powder
Color : Munsell 5Y8/1 (same as that of unit)
4. When the unit is used in a cold region and the heating operation
is continuously performed for a long time when the outside air
temperature is below freezing, install a heater to the unit base
or take other appropriate measures to prevent water from freezing on the base.
8.2. Countermeasure to seasonal wind
Referring to the figure shown below, take appropriate measures which
will suit the actual situation of the place for installation.
B
500(840)500
(670) 821 903
(990)
B
H
A Outlet
B Inlet
A Seasonal wind
9. Refrigerant piping installation
Connecting the piping is a terminal-branch type in which refrigerant piping from the outdoor unit is branched at the terminal and connected to each of
the indoor units.
The method of connection consists of flare connections at the indoor units, flange connections for the piping of the outdoor unit and flare connections
for the liquid piping. Note that the branched sections are brazed.
Warning:
Always use extreme care to prevent the refrigerant gas (R22) from leaking while using fire or flame. If the refrigerant gas comes in contact
with the flame from any source, such as a gas sto ve, it breaks do wn and generates a poisonous gas which can cause gas poisoning. Ne ver
weld in an unventilated room. Al wa ys conduct an inspection f or gas leakage after installation of the refrigerant piping has been completed.
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9.1. Areas of caution
1 Use the following materials for refrigeration piping.
• Material: Seamless phosphorous deoxidized copper pipe, C1220T-OL or C1220T-O (Note: C1220T-OL is preferred.)
14
• Size: Refer to Pages
2 Commercially available piping often contains dust and other materials. Always blow it clean with a dry inert gas.
3 Use care to prevent dust, water or other contaminants from entering the piping during installation.
4 Reduce the number of bending portions as much as possible, and make bending radius as big as possible.
5 Always use the branch piping set shown below, which are sold separately.
Line branching Header branching
Total of units downstream
less than 160
CMY-Y102S-F CMY-Y102L-F CMY-Y104-E CMY-Y107-E CMY-Y1010-E
6 If the diameters of the branch piping of the designated refrigerant piping differs, use a pipe cutter to cut the connecting section and then use an
adapter for connecting different diameters to connect the piping.
7 Always observe the restrictions on the refrigerant piping (such as rated length, the difference between high/low pressures, and piping diameter).
Failure to do so can result in equipment failure or a decline in heating/cooling performance.
8 A second branch cannot be made after a header branch. (These are shown by ×.)
to 16.
Total of units downstream
more than 161
Branch pipe set name
4 branching 7 branching 10 branching
A
A
B
A To Outdoor Unit
B Capped Piping
9 Always use good-quality materials for brazing.
0 The City Multi Series Y will stop due an abnormality due to excessive or insufficient coolant. At such a time, always properly charge the unit. When
servicing, always check the notes concerning pipe length and amount of additional refrigerant at both locations, the refrigerant volume calculation
table on the back of the service panel and the additional refrigerant section on the labels for the combined number of indoor units. (Refer to Pages
14
to 16.)
A Never perform a pump down. This will damage the compressor.
B Never use refrigerant to perform an air purge. Always evacuate using a vacuum pump.
C Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling performance, water drops from condensation and
other such problems. (Refer to Pages 21 to
D When connecting the refrigerant piping, make sure the ball valve of the outdoor unit is completely closed (the factory setting) and do not operate it
until the refrigerant piping for the outdoor and indoor units has been connected, a refrigerant leakage test has been performed and the evacuation
process has been completed.
E Always use a non-oxidizing brazing material for brazing the parts. If a non-o xidizing brazing material is not used, it could cause clogging or damage
to the compressor unit. (Details of the piping connections and valve operation can be found on Pages 17 to 18.)
22
.)
Warning:
When installing and moving the air conditioner to another site, do not charge the it with a refrigerant different from the refrigerant (R22)
specified on the unit.
- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.
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9.2. Refrigerant piping system
A
Line-Branch Method
Connection Examples
(Connecting to Five Indoor Units)
Permissible
Length
Permissible High/
Low Difference
Total Piping Length
Farthest Piping Length (L)
Farthest Piping Length After First Branch (r)
High/Low Difference in Indoor/Outdoor Section (H)
High/Low Difference in Indoor/Indoor Section (h)
■ Selecting the Refrigerant Branch Kit
Use the table to the right to make the selection
based on the model total of indoor units downstream from the branch section.
■ Select Each Section of Refrigerant Piping
(1) Section From Outdoor Unit
to First Branch (A)
(2) Sections From Branch to
Indoor Unit (a,b,c,d,e)
(3) Section From Branch to
Each
Section of
Piping
Branch (B, C, D)
Select the size from the table to the right.
C
D
Note:
The model total for downstream
units shown in the table below
is the model total when viewed
from Point A in the drawing
above.
A Outdoor Unit
B First Branch
5
C Indoor unit
D To downstream units
A
A
H
B
h
B C D
a b c d
C
C2C3C
1
L
R
e
4
A+B+C+D+a+b+c+d+e is 220 meters or less
A+B+C+D+e is 100 meters or less
B+C+D+e is 30 meters or less
50 meters or less (If the outdoor unit is lower, 40 meters or less)
15 meters or less
Select the branch kit, sold separately , from the tab le below. (Each kit contains a refrigerant and
gas piping set.)
Downstream Unit Model Total Branch Kit Model
160 or less CMY-Y102S-F
161 or more CMY-Y102L-F
(1) Refr igerant Piping Diameter In Section
From Outdoor Unit to First Branch (Outdoor Unit Piping Diameter)
Model Piping Diameter (mm)
PUHY-200 Liquid Line ø12.7
PUY-200 Gas Line ø25.4
PUHY-250 Liquid Line ø12.7
PUY-250 Gas Line ø28.58
(2) Refr igerant Piping Diameter In Section
From Branch to Indoor Unit (Indoor Unit
Piping Diameter)
Model number Piping dia. (mm)
20 · 25 · 32 · 40
50 · 63 · 80
100 · 125
Liquid Line ø6.35
Gas Line ø12.7
Liquid Line ø9.52
Gas Line ø15.88
Liquid Line ø9.52
Gas Line ø19.05
(3) Refr igerant Piping Diameter In Section
From Branch to Branch
Downstream Unit Model Total Liquid Line (mm) Gas Line (mm)
80 or less ø9.52 ø15.88
81 to 160 ø12.7 ø19.05
161 or more ø12.7 ø25.4
■ Additional Refrigerant Charge
At the time of shipping, the outdoor unit PU(H)Y200 is charged with 6.5 kilograms of refrigerant
and the PU(H)Y -250 is charged with 8.5 kilograms.
As this charge does not include the amount
needed for extended piping, additional charging
for each refrigerant line will be required on site. In
order that future servicing may be properly provided, always keep a record of the size and length
of each refrigerant line and the amount of additional charge by writing it in the space provided
on the outdoor unit.
■ Calculation of Additional Refrigerant Charge
• Calculate the amount of additional charge
based on the length of the piping extension
and the size of the refrigerant line.
• Use the table to the right as guide to calculating the amount of additional charging and
charge the system according.
• If the calculation results of the calculation result in a fraction of less than 0.1 kg, round up
to the next 0.1 kg. For e xample, if the result of
the calculation was 11.06 kilograms, round the
result up to 11.1 kilograms.
14
<Additional Charge>
Additional
refrigerant charge
Liquid pipe size
Total length of
ø12.7 × 0.12
=+++ α
(kg)
(m) × 0.12 (kg/m)
Liquid pipe size
Total length of
ø9.52 × 0.06
(m) × 0.06 (kg/m)
<Example>
Indoor 1 : 50 A : ø12.7 40 m a : ø9.52 10 m
2 : 100 B : ø12.7 10 m b : ø9.52 10 m
3:50 C:ø12.7 5 m c : ø9.52 10 m
4:32 D:ø9.52 5 m d : ø6.35 5 m
5:32 e:ø6.35 10 m
The total length of each liquid line is as follows
ø12.7 : A + B + C = 40 + 10 + 5 = 55 m
ø9.52 : D + a + b + c = 5 + 10 + 10 + 10 = 35 m
ø6.35 : d + e = 5 + 10 = 15 m
Therefore,
<Calculation example>
Additional
refrigerant charge = 55 × 0.12 + 35 × 0.06 + 15
× 0.024 + 2 = 11.1 kg
Liquid pipe size
Total length of
ø6.35 × 0.024
(m) × 0.024 (kg/m)
At the conditions
below:
Value of α
Total capacity of
connecting indoor units
to Model 80 1.0 kg
Models 81 to 160 1.5 kg
Models 161 to 325 2.0 kg
α
Page 15
A
Header Branch Method
Connection Examples
(When Connecting Six Indoor Units)
Permissible
Length
Permissible High/
Low Difference
Total Piping Length
Farthest Piping Length (L)
Farthest Piping Length After First Branch (r)
High/Low Difference in Indoor/Outdoor Section (H)
High/Low Difference in Indoor/Indoor Section (h)
■ Selecting the Refrigerant Branch Kit
Use the table to the right to make the selection
based on the number of indoor units to be connected.
■ Select Each Section of Refrigerant Piping
(1) Section From Outdoor Unit
to First Branch (A)
(2) Sections From Branch to
Each Section
of Piping
Indoor Unit (a,b,c,d,e,f)
Select the size from the table to the right.
A
B
H
b
a
CC
12
h
c d
3
L
D
e f
CCC
4
5
R
6
C
Note:
Branch piping cannot be used
again after the header branch.
A Outdoor Unit
B First Branch
C Indoor Unit
D Cap
A+a+b+c+d+e+f is 220 meters or less
A+f is 100 meters or less
f is 30 meters or less
50 meters or less (If the outdoor unit is lower, 40 meters or less)
15 meters or less
Select the branch kit, sold separately , from the tab le below. (Each kit contains a refrigerant and
gas piping set.)
4-Branching Header 7-Branching Header 10-Branching Header
CMY-Y104-E CMY-Y107-E CMY-Y1010-E
(1) Refr igerant Piping Diameter In Section
From Outdoor Unit to First Branch (Outdoor Unit Piping Diameter)
Model Piping Diameter (mm)
PUHY-200 Liquid Line ø12.7
PUY-200 Gas Line ø25.4
PUHY-250 Liquid Line ø12.7
PUY-250 Gas Line ø28.58
(2) Refrigerant Piping Diameter In Section
From Branch to Indoor Unit (Indoor Unit
Piping Diameter)
Model number Piping dia. (mm)
20 · 25 · 32 · 40
50 · 63 · 80
100 · 125
Liquid Line ø6.35
Gas Line ø12.7
Liquid Line ø9.52
Gas Line ø15.88
Liquid Line ø9.52
Gas Line ø19.05
■ Additional Refrigerant Charge
At the time of shipping, the outdoor unit PU(H)Y200 is charged with 6.5 kilograms of refrigerant
and the PU(H)Y-250 is charged with 8.5 kilograms. As this charge does not include the
amount needed for extended piping, additional
charging for each refrigerant line will be required
on site. In order that future servicing may be properly provided, always keep a record of the size
and length of each refrigerant line and the amount
of additional charge by writing it in the space provided on the outdoor unit.
■ Calculation of Additional Refrigerant Charge
• Calculate the amount of additional charge
based on the length of the piping extension
and the size of the refrigerant line.
• Use the table to the right as guide to calculating the amount of additional charging and
charge the system according.
• If the calculation results of the calculation result in a fraction of less than 0.1 kg, round up
to the next 0.1 kg.
<Additional Charge>
Additional
refrigerant charge
Liquid pipe size
Total length of
ø12.7 × 0.12
=+++ α
(kg)
(m) × 0.12 (kg/m)
Liquid pipe size
Total length of
ø9.52 × 0.06
(m) × 0.06 (kg/m)
<Example>
Indoor 1 : 50 A : ø12.7 40 m a : ø9.52 20 m
2:63 b:ø9.52 10 m
3:40 c:ø6.35 5 m
4:32 d:ø6.35 20 m
5:32 e:ø6.35 20 m
6:32 f :ø6.35 30 m
The total length of each liquid line is as follows
ø12.7 : A = 40 m
ø9.52 : a + b = 20 + 10 = 30 m
ø6.35 : c + d + e + f = 5 + 20 + 20 + 30 = 75 m
Therefore,
<Calculation example>
Additional
refrigerant charge = 40 × 0.12 + 30 × 0.06 + 75
× 0.024 + 2 = 10.4 kg
Liquid pipe size
Total length of
ø6.35 × 0.024
(m) × 0.024 (kg/m)
At the conditions
below:
Value of α
Total capacity of
connecting indoor units
to Model 80 1.0 kg
Models 81 to 160 1.5 kg
Models 161 to 325 2.0 kg
α
15
Page 16
Multiple Line/Header
Connection Example
(When Connecting Five Indoor Units)
Permissible
Length
Permissible High/
Low Difference
Total Piping Length
Farthest Piping Length (L)
Farthest Piping Length After First Branch (r)
High/Low Difference in Indoor/Outdoor Section (H)
High/Low Difference in Indoor/Indoor Section (h)
■ Selecting the Refrigerant Branch Kit
Use the table to the right to make the selection
based on the model total of indoor units downstream from the branch section or on the number
of indoor units to be connected on the header
branch.
G
A
A
B
H
B
C
A
C
c
34
D
a
D
1
E
F
d
D
L
R
b
e
5
D
2
D
Note:
• Branch piping cannot be used
again after the header branch.
• The model total for downstream units shown in the table below is the model total
when viewed from Point A in
the drawing above.
A Outdoor Unit
B First Branch (Branch Joint)
C Branch Joint
h
D Indoor Unit
E Branch Header
F Cap
G To downstream units
A+B+C+a+b+c+d+e is 220 meters or less
A+B+b is 100 meters or less
B+b is 30 meters or less
50 meters or less (If the outdoor unit is lower, 40 meters or less)
15 meters or less
Select the branch kit, sold separately , from the tab le below. (Each kit contains a refrigerant and
gas piping set.)
Line branching Header branching
Total of units down-
stream less than 160
Total of units down-
stream more than 161
4 branching
header
7 branching
header
10 branching
header
CMY-Y102S-F CMY-Y102L-F CMY-Y104-E CMY-Y107-E CMY-Y1010-E
■ Select Each Section of Refrigerant Piping
(1) Section From Outdoor Unit
to First Branch (A)
(2) Sections From Branch to
Indoor Unit (a,b,c,d,e)
(3) Section From Branch to
Each
Section of
Piping
Branch (B, C)
Select the size from the table to the right.
■ Additional Refrigerant Charge
At the time of shipping, the outdoor unit PU(H)Y200 is charged with 6.5 kilograms of refrigerant
and the PU(H)Y-250 is charged with 8.5 kilograms. As this charge does not include the
amount needed for extended piping, additional
charging for each refrigerant line will be required
on site. In order that future servicing may be properly provided, always keep a record of the size
and length of each refrigerant line and the amount
of additional charge by writing it in the space provided on the outdoor unit.
■ Calculation of Additional Refrigerant Charge
• Calculate the amount of additional charge
based on the length of the piping extension
and the size of the refrigerant line.
• Use the table to the right as guide to calculating the amount of additional charging and
charge the system according.
• If the calculation results of the calculation result in a fraction of less than 0.1 kg, round up
to the next 0.1 kg. For example , if the result of
the calculation was 11.12 kilograms, round
the result up to 11.2 kilograms.
(1) Refr igerant Piping Diameter In Section
From Outdoor Unit to First Branch (Outdoor Unit Piping Diameter)
Model Piping Diameter (mm)
PUHY-200 Liquid Line ø12.7
PUY-200 Gas Line ø25.4
PUHY-250 Liquid Line ø12.7
PUY-250 Gas Line ø28.58
(2) Refr igerant Piping Diameter In Section
From Branch to Indoor Unit (Indoor Unit
Piping Diameter)
Model number Piping dia. (mm)
20 · 25 · 32 · 40
50 · 63 · 80
100 · 125
(3) Refr igerant Piping Diameter In Section
From Branch to Branch
Downstream Unit Model Total Liquid Line (mm) Gas Line (mm)
80 or less ø9.52 ø15.88
81 to 160 ø12.7 ø19.05
161 or more ø12.7 ø25.4
<Additional Charge>
Additional
refrigerant charge
Liquid pipe size
Total length of
ø12.7 × 0.12
=+++ α
(kg)
(m) × 0.12 (kg/m)
Liquid pipe size
Total length of
ø9.52 × 0.06
(m) × 0.06 (kg/m)
<Example>
Indoor 1 : 50 A : ø12.7 30 m a : ø9.52 10 m
2 : 100 B : ø12.7 10 m b : ø9.52 20 m
3:40 C:ø12.7 15 m c : ø6.35 10 m
4:32 d:ø6.35 10 m
At the conditions
below:
5:32 e:ø6.35 10 m
The total length of each liquid line is as follows
ø12.7 : A + B + C = 30 + 10 + 15 = 55 m
ø9.52 : a + b = 10 + 20 = 30 m
ø6.35 : c + d + e = 10 + 10 + 10 = 30 m
Therefore,
<Calculation example>
Additional
refrigerant charge = 55 × 0.12 + 30 × 0.06 + 30
Value of α
Total capacity of
connecting indoor units
to Model 80 1.0 kg
Models 81 to 160 1.5 kg
Models 161 to 325 2.0 kg
× 0.024 + 2 = 11.2 kg
Liquid Line ø6.35
Gas Line ø12.7
Liquid Line ø9.52
Gas Line ø15.88
Liquid Line ø9.52
Gas Line ø19.05
Liquid pipe size
Total length of
ø6.35 × 0.024
(m) × 0.024 (kg/m)
α
16
Page 17
9.3. Caution for piping connection/valve
operation
• Conduct piping connection and valve operation accurately b y follo w-
ing the figure below.
• The gas side connecting pipe is being assembled for shipment.
(See the figure at the right.)
1 For brazing to the connecting pipe with flange, remove the con-
necting pipe with flange from the ball valve, and braze it at the
outside of the unit.
2 During the time when removing the connecting pipe with flange,
remove the seal attached on the back side of this sheet and paste
it onto the flange surface of the ball valve to prevent the entry of
dust into the valve.
3 The refrigerant circuit is closed with a round, close-packed pack-
ing at the shipment to prevent gas leak between flanges. As no
operation can be done under this state, be sure replace the packing with the hollow packing attached at the piping connection.
4 At the mounting of the hollow packing, wipe off dust attached on
the flange sheet surface and the packing. Coat refrigerating machine oil onto both surfaces of the packing.
A
3
1
A Replace the close-packed packing
B Hollow packing
• After evacuation and refrigerant charge, ensure that the handle is
fully open. If operating with the v alve closed, abnormal pressure will
be imparted to the high- or low-pressure side of the refrigerant circuit, giving damage to the compressor, four-w ay valve, etc.
• Determine the amount of additional refrigerant charge by using the
formula, and charge refrigerant additionally through the service port
after completing piping connection work.
• After completing work, tighten the service port and cap securely not
to generate gas leak.
B
A
B
C
D
[Ball valve (gas side)] [Ball valve (liquid side)]
EE
O
S
S
O
I
F
G
H
J
K
(This figure shows the valve in the fully open state.)
17
Page 18
A Valve stem
[Fully closed at the factory , when connecting the piping, when evacuating,
and when charging additional refrigerant. Open fully after the operations
above are completed.]
B Stopper pin [Prevents the valve stem from turning 90° or more.]
C Packing (Accessory)
[Manufacturer: Nichiasu corporation]
[T ype: T/#1991-NF]
D Connecting pipe (Accessory)
[Use packing and securely install this pipe to the valve flange so that gas
leakage will not occur. (Tightening torque: 25 Nm (250 kg-cm)) Coat both
surfaces of the packing with refrigerator oil.]
E Open (Operate slowly)
F Cap, copper packing
[Remove the cap and operate the valv e stem. Alwa ys reinstall the cap after
operation is completed. (Valve stem cap tightening torque: 25 Nm (250 kgcm) or more)]
G Service port
[Use this port to evacuate the refrigerant piping and add an additional charge
at the site.
Open and close the port using a double-ended wrench.
Always reinstall the cap after operation is completed. (Service port cap
tightening torque: 14 Nm (140 kg-cm) or more)]
H Flare nut
[Tightening torque: 55 Nm (550 kg-cm)
Loosen and tighten this nut using a double-ended wrench.
Coat the flare contact surface with refrigerator oil.]
I ø12.7
J ø25.4 (PUHY-200, PUY-200)
ø28.58 (PUHY-250, PUY-250)
K Field piping
[Braze to the connecting pipe. (When brazing, use unoxidized brazing.]
Appropriate tightening torque by torque wrench
Copper pipe external dia. (mm) Tightening torque (Nm)/(kg-cm)
ø6.35 14 to 18 / 140 to 180
ø9.52 35 to 42 / 350 to 420
ø12.7 50 to 57.5 / 500 to 575
ø15.88 75 to 80 / 750 to 800
ø19.05 100 to 140 / 1000 to 1400
Caution:
• Always remove the connecting pipe from the ball valve and braze
it outside the unit.
- Brazing the connecting pipe while it is installed will heat the ball
valve and cause trouble or gas leakage. The piping, etc. inside the
unit may also be burned.
9.4. How to install branch pipe
For detail, please observe the instruction manual attached to the optional refrigerant branch kit.
■ Joint
A
A To Outdoor Unit
B To Branch Piping or Indoor Unit
• There is no limitation on the joint mounting configuration.
• If the diameter of the refrigerant piping selected by the procedures
described on pages 14 to 16 is different from the size of the joint,
match the sizes using a deformed joint. The deformed joint is included with the kit.
■ Header
B
Tightening angle standard
Pipe diameter (mm) Tightening angle (°)
ø6.35, ø9.52 60 to 90
ø12.7, ø15.88 30 to 60
ø19.05 20 to 35
Note:
If a torque wrench is not available, use the following method as a
standard
When you tighten the flare nut with a wrench, y ou will reach a point
where the tightening torque will abrupt increase. Turn the flare nut
beyond this point by the angle shown in the table above.
A
B
A To outdoor unit
B To indoor unit
• No restriction is applied to the mounting posture of the header.
• If the diameter of the refrigerant piping selected using the proce-
dures described on pages 15 to 16 and the size of the joint is different, match the sizes using a deformed joint. The deformed joint is
included with the kit.
18
Page 19
C
• When the number of pipes to be connected is smaller than the number
of header branches, install a cap to the unconnected branches. The
cap is included with the kit.
D
C Pipe cutter
D or
E Deformed joint
E
19
Page 20
9.5. Airtight test and evacuation
1 Airtight test
Airtight test should be made by pressurizing nitrogen gas to 2.94 MPa. For the test method, refer to the following figure. (Make a test with the ball
valve closed. Be also sure to pressurize both liquid pipe and gas pipe.)
The test result can be judged good if the pressure has not bee reduced after leaving for about one day after completion of nitrogen gas pressurization.
F
A Nitrogen gas
B To indoor unit
C System analyzer
D Lo Knob
E Hi Knob
F Ball valve
G Liquid pipe
H Gas pipe
I Outdoor unit
J Service port
2 Evacuation
Evacuation should be made from the service port provided on the outdoor unit’s ball valve to the vacuum pump commonly used f or both liquid pipe
and gas pipe. (Make evacuation from both liquid pipe and gas pipe with the ball valve closed.)
* Never perform air purging using refrigerant.
A
C
D
B
C
LO
HI
E
D
A System analyzer
B Lo Knob
C Hi Knob
D Ball valve
E Liquid pipe
F Gas pipe
G Service port
H Three-way joint
I Valve
J Valve
K Freon 22 cylinder
L Scale
Use a graviometer. (One that can measure down to 0.1 kg.)
If you are unable to prepare such a high-precision gravimeter,
you may use a charge cylinder.
M Vacuum pump
LO HI
B
A
C
H
E
F
G
I
J
K
L
G
H
I
J
M
Note:
Always add an appropriate amount of refrigerant. (For the refrigerant additional c harge, see pages 14 to 16.) T oo m uch or too little refrigerant
will cause trouble.
Warning:
When installing and moving the air conditioner to another site, do not charge the it with a refrigerant different from the refrigerant (R22)
specified on the unit.
- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.
20
Page 21
9.6. Thermal insulation of refrigerant piping
Be sure to give insulation work to refrigerant piping by covering liquid
pipe and gas pipe separately with enough thickness heat-resistant
polyethylene, so that no gap is observed in the joint between indoor unit
and insulating material, and insulating materials themselves. When insulation work is insufficient, there is a possibility of condensation drip,
etc. Pay special attention to insulation work to ceiling plenum.
B
A
C
Heat
insulation
material A
Outer
covering B
Note:
When using polyethylene cover as covering material, asphalt roofing shall not be required.
Glass fiber + Steel wire
Adhesive + Heat - resistant polyethylene foam +
Adhesive tape
Indoor Vinyl tape
Floor exposed
Outdoor
Water-proof hemp cloth + Bronze asphalt
Water-proof hemp cloth + Zinc plate + Oily paint
D
A Steel wire
B Piping
C Asphaltic oily mastic or asphalt
D Heat insulation material A
E Outer covering B
• Do not insulate gas or low pressure pipe and liquid or high
pressure pipe together.
Bad example
A
E
B
C
D
E
A
Good example
E
E
B
D
Note:
No heat insulation must be provided for electric wires.
A Liquid pipe
B Gas pipe
C Electric wire
D Finishing tape
E Insulating material
A Liquid pipe
B Gas pipe
D Finishing tape
E Insulating material
• Be sure to fully insulate connecting portion.
A
A These parts are not insulated.
21
Page 22
Penetrations
E
I
B
Inner wall (concealed) Outer wall Outer wall (exposed)
Floor (fireproofing) Roof pipe shaft Penetrating portion on fire limit and boundary wall
A Sleeve
B Heat insulating material
C Lagging
D Caulking material
E Band
F Waterproofing layer
G Sleeve with edge
A B
D
G
B
F
C
D
A B
G
I
J
D
B
H
F
H Lagging material
I Mortar or other incombustible caulking
J Incombustible heat insulation material
When filling a gap with mortar, cover the penetration part with steel plate
so that the insulation material will not be caved in. For this part, use
incombustible materials for both insulation and cov ering. (Vinyl co vering
should not be used.)
A
1m1m
Branch piping section
Insulate the header using
the insulation
material attached to the
branch pipe kit
as shown in the figure.
22
Page 23
10. Electrical work
10.1. Caution
1 Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each
electric power company.
Warning:
Be sure to have authorized electric engineers do electric work using special circuits in accordance with regulations and this installation
manual. If power supply circuit has a lack of capacity or electric work deficiency, if may cause an electric shock or fire.
2 Install the outdoor unit transmission line away from the power source wiring so that it is not affected by electric noise from the power source . (Do not
run it through the same conduit.)
3 Be sure to provide designated grounding work to outdoor unit.
Caution:
Be sure to put outdoor unit to earth. Do not connect earth line to any gas pipe, water pipe, lightning rod or telephone earth line. If earth is
incomplete, it may cause an electric shock.
4 Give some allowance to wiring for electrical part box of indoor and outdoor units, because the box is sometimes removed at the time of service work.
5 Never connect the main power source to terminal block of transmission line. If connected, electrical parts will be burnt out. ( mark in the figure
below)
6 Use 2-core shield cable for transmission line. If transmission lines of different systems are wired with the same multiplecore cable , the resultant poor
transmitting and receiving will cause erroneous operations. (× mark in the figure below)
7 Only the transmission line specified should be connected to the terminal block for outdoor unit transmission.
(Transmission line to be connected with indoor unit : Terminal block TB3 for transmission line, Other : Terminal block TB7 for centralized control)
Erroneous connection does not allow the system to operate.
8 In case to connect with the upper class controller or to conduct group operation in different refrigerant systems, the control line for transmission is
required between the outdoor units each other.
Connect this control line between the terminal blocks for centralized control. (2-wire line with no polarity)
When conducting group operation in different refrigerant systems without connecting to the upper class controller, replace the insertion of the short
circuit connector from CN41 of one outdoor unit to CN40.
9 Group is set by operating the remote controller.
A
C
TB3
TB7
B
D
TB3
TB7
TB3: Transmission line terminal board, TB7: Central control line terminal board
A Outdoor unit
B 2-core cable
C Indoor unit
D Remote controller
E Multi-core cable
B
TB3
TB3
TB7
TB7
A
C
E
D
23
Page 24
10.2. Control box and connecting position of wiring
1 Outdoor unit
1. Remove the service panel by taking out the screws at each of the
service panel’s four corners as shown in the figure below.
A
3. Connect indoor and outdoor units through the terminal block for transmission lines (TB3). Outdoor units and connections to central control
systems go through the terminal block for centralized control (TB7).
When making an indoor/outdoor connection with shielded wiring, connect the shield ground to the earth screw (
). When making a central control system connection with shielded wiring, use the terminal
block for centralized control (TB7).
When the CN41 power supply connector of an outdoor unit has been
replaced with a CN40, the shield terminal (S) for centralized control
(TB7) should also be connected to the earth screw (
).
2 How to use the conduit mounting plate
(1) Conduit mounting plates (∅27, ∅33, ∅40) are being provided.
Select conduit mounting plate based on the outside diameter of conduit to be used and mount it as shown in the figure.
(2) Fix power source wiring to control box by using buffer bushing for
tensile force (PG connection or the like)
A
B
C
A Service panel
2. The control box cover is divided into two sections. Two screws must
be removed from each section to open the control box. However,
when working in the field, it may be necessary to remove only one
section of the control box cover . The power source line and tr ansmission line are accessible by removing the lower co ver. The connector
and dip switch can be operated by removing just the upper cover.
The illustration below provides a detail of the interior of the control
box.
A
B
LD1
CD
E
AB
RS
T
ABS
TB3 TB7
F
G
H
D
E
B
A
e
c
r
o
f
e
l
i
s
n
e
T
knockout hole
F
A ∅ 27 mounting hole
B ∅ 30 mounting hole
C ∅ 40 knockout hole
D For the connecting of conduit at bottom
E ∅ 40 mounting hole
F For the connecting of conduit at front
G The front of outdoor unit
To prevent external tensile force from applying to the wiring connection
section of power source terminal block, use buffer bushing like PG
connection or the like.
3 How to use the wire mounting plate
When the power source and transmission lines are wired through the
knock-out hole of the left wiring/front piping, it is necessary to attach the
mounting plate onto the base of the front of the compressor with two
screws.
In this case, the power source should be fastened with a lower clamp
and the transmission line with an upper clamp as shown.
G
A Inverter board (INV board)
B Control board (MAIN board)
C Ten position
D One position
E Address switch
F Power source
G Earth screw
H Transmission line
24
clamp
wire mounting plate
source wire
transmission
wire
front side
control Box
Page 25
10.3. Wiring transmission cables
1 Types of control cables
1. Wiring transmission cables
• Types of transmission cables
Shielding wire CVVS or CPEVS
• Cable diameter
More than 1.25 mm
• Maximum wiring length Within 200 m
2. Remote control cables
2
Kind of remote control
cable
Cable diameter
Remarks
2 Wiring examples
Typical wiring examples are shown on pages 26 to 29.
• Names, symbols, and number of connectable units
Name Symbol Number of connectable units
Outdoor unit controller OC
Indoor Unit Controller IC OC1: From 1 to 13 Units (PUHY-
Remote controller RC Max. 2 in 1 group
Note:
The IC and RC are limited to a maximum of 35 units.
2-core cable (unshielded)
0.5 to 0.75 m
When 10 m is exceeded, use cable with
the same specifications as (1) Transmission line wiring.
200, PUY -200), F rom 1 to 16 Units
(PUHY-250, PUY-250)
2
25
Page 26
A. Example of a single-outdoor-unit system (Shielding wires and address setting are necessary.)
Example of Wiring Control Cables Wiring Method and Address Setting
1. Standard Operation
OC
(51)
TB3 TB7
AB ABS
L
1
(01) (02)
TB5
ABS
3
L
2
IC IC
TB13
123
TB5
ABS
TB13
123
a. Use feed wiring to connect terminals A and B on
b. Connect terminals A and B on the transmission ca-
c. Set the address setting switch as shown below.
* To set the outdoor unit address to 100, the outdoor
R2
• One remote controller for each indoor
unit.
• Inside ( ) Address: There is no need for
R1L
TB6
(101)
RC
TB6
(102)
RC
Outdoor Unit
setting the 100 position on the remote
controller.
2. Operation Using Two Remote controllers
OC
IC IC
(51)
TB3 TB7
AB ABS
(01) (02)
TB5
TB13
ABS
123
TB5
ABS
TB13
123
a. Same as above
b. Same as above
c. Set the address switch as shown below.
* To set the outdoor unit address to 100, the outdoor
Outdoor Unit
Main Remote
a. Same as above
• Using two remote
controllers for each
indoor unit.
3. Group Operation
TB6
(101)
RC
AB AB
TB6
(151)
RC
TB6
(102)
RC
TB6
(152)
RC
A Main Remote Con-
troller
B Sub Remote Con-
troller
b. Connect terminals A and B on transmission cable ter-
OC
(51)
TB3 TB7
AB ABS
IC A IC B
(01) (02)
TB5
TB13
ABS
123
TB6
(101)
RC
TB5
ABS
TB13
123
c. Set the address setting switch as shown below.
* To set the outdoor unit address to 100, the outdoor
• Operating multiple indoor units
using one remote controller.
A Main
B Sub
Main Remote
d. Use the indoor unit (IC) within the group with the most
Combinations of 1 through 3 above are possible.
transmission cable block (TB3) for the outdoor unit
(OC) to terminals A and B on the transmission cable
block (TB5) of each indoor unit (IC). Use non-polarized two wire.
To ground the shielded wire, use cross-over wiring
from the ground terminal E on the outdoor unit and
terminal S on the indoor unit (TB5).
ble block (TB5) f or each indoor unit with the terminal
block (TB6) for the remote controller (RC).
address setting switch must be set to 50.
Unit
Indoor Unit
Range
01 to 50
Setting Method
—
Use the most recent
51 to 100
address of all the indoor
units plus 50.
Remote
Controller
101 to 150
Indoor unit address plus
100.
address setting switch must be set to 50.
Unit
Indoor Unit
Range
01 to 50
Setting Method
—
Use the most recent
51 to 100
address of all the indoor
units plus 50.
Controller
Sub Remote
Controller
101 to 150
151 to 200
Indoor unit address plus
100.
Indoor unit address plus
150.
minal block (TB5) of the IC main unit with the most
recent address within the same indoor unit (IC) group
to terminal block (TB6) on the remote controller.
address setting switch must be set to 50.
Unit
Range
Setting Method
Use the most recent ad-
IC (Main)
01 to 50
dress within the same group
of indoor units.
Use an address, other than
that of the IC (Main) from
IC (Sub)
01 to 50
among the units within the
same group of indoor units.
This must be in sequence
with the IC (Main).
Use the most recent ad-
Outdoor Unit
51 to 100
dress of all the indoor units
plus 50.
Set at an IC (Main) address
Controller
Sub Remote
Controller
101 to 150
151 to 200
within the same group plus
100.
Set at an IC (Main) address
within the same group plus
150.
functions as the IC (Main) unit.
26
Page 27
Permissible Lengths Prohibited Items
Longest Transmission Cable Length
(1.25 mm2)
L1 + L2, L2 + L3, L3 + L1 = 200 meters
Remote Controller Cable Length
1 If 0.5 to 0.75 mm
2
r1 , r2 = 10 meters
2 If the length exceeds 10 meters,
the exceeding section should be
1.25 mm2 and that section should
be a value within the total extension length of the transmission ca-
OC
(51)
TB3 TB7
AB ABS
IC IC
(01) (02)
TB5
TB13
ABS
123
ble and maximum transmission
cable length (L
3).
TB5
ABS
TB13
123
• Use the indoor unit
(IC) address plus 150
as the sub remote
controller address. In
this case, it is 152.
• Three or more remote
controllers (RC)
cannot be connected
to one indoor unit.
Same as above
Same as above
Same as above
OC
(51)
TB3 TB7
AB ABS
TB6
(101)
RC
AB AB
TB6
(151)
RC
IC A IC B
(01) (02)
TB5
ABS
TB6
(102)
RC
TB13
123
TB6
(103)
RC
TB5
ABS
123
TB13
TB6
(104)
RC
A Main
B Sub
TB6
(102)
RC
• The remote controller address is the
indoor unit main
address plus 100. In
this case, it is 101.
A Main
B Sub
27
Page 28
B. Example of a group operation system with multiple outdoor units (Shielding wires and address setting are necessary.)
Examples of Transmission Cable Wiring
1
L
OC
CN40
(51)
TB3
AB
ABS
TB7
R1
D
L9
L5 L6 L7
OC
(52)
TB3
AB
ABS
TB7
A
IC
(01)
TB5
ABS
TB6
(101)
IC
(02)
TB5
ABS
L2 L3 L4
BC
IC
(04)
TB5
TB13
123
TB13
123
L8
ABS
TB5
ABS
TB13
123
R2
IC
(03)
TB13
123
TB5
ABS
TB6
(105)
RC
TB5
ABS
IC
(05)
IC
(07)
TB13
123
R3
TB13
123
TB6
(155)
RC
E
TB5
ABS
IC
(06)
TB13
123
A Group 1
B Group 3
C Group 5
D Shielded Wire
E Sub Remote Controller
( ) Address
R4
TB6
(101)
RC
a. Always use shielded wire when making connections between the outdoor unit (OC) and the indoor unit (IC), as well for all OC-OC, and IC-
IC wiring intervals.
b. Use feed wiring to connect terminals A and B and the ground terminal on the transmission cable terminal block (TB3) of each outdoor unit
(OC) to terminals A, B and terminal S on the transmission cable block of the indoor unit (IC).
c. Connect terminals A and B on the transmission cable terminal block of the indoor unit (IC) that has the most recent address within the same
group to the terminal block (TB6) on the remote controller (RC).
d. Connect together terminals M1, M2 and terminal S on the terminal block for central control (TB7) for the outdoor unit (OC).
e. On one outdoor unit only, change the jumper connector on the control panel from CN41 to CN40.
f. Connect the terminal S on the terminal block for central control (TB7) for the outdoor unit (OC) for the unit into which the jumper connector
was inserted into CN40 in Step above to the ground terminal in the electrical component box.
g. Set the address setting switch as follows.
* To set the outdoor unit address to 100, the outdoor address setting switch must be set to 50.
Unit Range Setting Method
IC (Main) 01 to 50 Use the most recent address within the same group of indoor units.
IC (Sub) 01 to 50
Wiring Method and Address Settings
Outdoor Unit 51 to 100 Use the most recent address of all the indoor units plus 50.
Use an address, other than that of the IC (Main) from among the units within the same group of
indoor units. This must be in sequence with the IC (Main).
Main Remote Controller 101 to 150 Set at an IC (Main) address within the same group plus 100.
Sub Remote Controller 151 to 200 Set at an IC (Main) address within the same group plus 150.
h. The group setting operations among the multiple indoor units is done by the remote controller (RC) after the electrical power has been
turned on.
28
Page 29
• Max length via outdoor units : L1+L2+L3+L4+L5+L6+L7+L9,
AB c
L1+L2+L3+L4+L5+L6+L7+L9 = 500 meters (1.25 mm2)
• Max transmission cable length : L
• Remote controller wire length : r
1+L2+L3+L4+L5+L6+L7, L5+L6+L8, L7+L8
1, r2, r3, r4
If the length exceeds 10 meters, use a 1.25 mm2 shielded wire. The length of this section (L8) should be
Permissible Lengths
AB
OC
(51)
CN40
ABS
TB7
D
included in the calculation of the maximum length and overall length.
IC
(01)
TB5
TB13
ABS
123
TB6
(101)
=
10 meters (0.5 to 0.75 mm2)
=
IC
(04)
TB5
TB13
ABS
123
200 meters (1.25 mm2)
IC
(05)
TB5
TB13
ABS
123
TB6
(105)
TB6
(115)
TB5
ABS
IC
(06)
TB13
123
Prohibited Items
A Group 1
B Group 3
C Group 5
D Shielded Wire
E Remote Controller
TB3
AB
OC
(52)
ABS
TB7
RC
E
TB5
ABS
TB6
(103)
RC
IC
(03)
TB13
123
IC
TB5
ABS
(02)
TB13
123
RC
TB5
ABS
RC
IC
(07)
TB13
123
• The terminal S on the terminal block (TB7) for the central control panel should be connected to the ground terminal of the electric
components box of the only outdoor unit installed with the CN40 into which the jumper connector was inserted.
• Never connect together the terminal blocks (TB5) f or tr ansmission wires for indoor units (IC) that have been connected to different outdoor
units (OC).
• Set all addresses to ensure that they are not overlapped.
29
Page 30
10.4. Wiring of main power supply and
equipment capacity
Schematic Drawing of Wiring (Example)
A Power Supply (3-Phase, 3-Wire) 220 Volt
B Switch (Breakers for Wiring and Current Leakage)
C Outdoor Unit
D Ground
Thickness of Wire for Main Power Supply and On/Off Capacities
Switch (A)Minimum Wire Thickness (mm2)
Model
PUHY-200
PUY-200
PUHY-250
Outdoor Unit
PUY-250
Model
All Models
Indoor Unit
Main Cable
8.0
14.0
Wire Thickness (mm)
Main
Cable
1.6 1.6 1.6
Branch Capacity
–
–
Branch
Ground
Ground
3.5
3.5
Switch (A)
Capacity Fuse
60
60
Breaker for
1515 20 A 20 A 30 mA 0.1 s. or less
Fuse
50
50
Wiring
E Power Supply (Single-Phase) 220 Volt
F 1.6 mm or more
G Pull Box
H Indoor Unit
Breaker
for Wiring
(NFB)
50 A
50 A
Breaker for Current Leakage
Breaker for Current Leakage
50 A 100 mA 0.1 s. or less
50 A 100 mA 0.1 s. or less
1. Use a separate power supply for the outdoor unit and indoor unit.
2. Bear in mind ambient conditions(ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections.
3. The wire size is the minimum value for metal conduit wiring. The power cord size should be 1 rank thicker consideration of voltage drops.
Make sure the power-supply voltage does not drop more than 10%.
4. Specific wiring requirements should adhere to the wiring regulations of the region.
5. Power supply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene sheathed flexible cord (design 245
IEC57). For example, use wiring such as YZW.
Warning:
• Be sure to use specified wires to connect so that no external force is imparted to terminal connections. If connections are not fixed firmly,
it may cause heating or fire.
• Be sure to use the appropriate type of overcurrent protection switc h. Note that generated over current may inc lude some amount of direct
current.
Caution:
• Some installation site may require attachment of an earth leakage breaker. If no earth leakage breaker is installed, it may cause an electric
shock.
• Do not use anything other than breaker and fuse with correct capacity. Using fuse and wire or copper wire with too large capacity may
cause a malfunction of unit or fire.
30
Page 31
11. Test run
11.1. Checking before getting test run
1 Check to see whether there are refrigerant leakage, and slack of power or transmission cab le.
Confirm that 500 V megger shows 1.0 MΩ or more between power supply terminal block and g round. Do not operate in the case of 1.0 MΩ or less.
2
NOTE:Never carry out megohm check over terminal block for transmission. Otherwise the control board would be broken.
Immediately after mounting the unit or after leaving it turned off for an extended length of time, the resistance of the insulation between the
power supply terminal block and the ground may decrease to appro x. 1 MΩ as a result of refrigerant accumulating in the internal compressor.
If the insulation resistance is more than 1 MΩ, turning on the main power supply and energizing the crankcase heater for more than 12
hours will cause the refrigerant to evaporate, increasing the insulation resistance.
Check to see whether both gas and liquid valves are fully open.
3
NOTE: Be sure to tighten caps.
Check the phase sequence and the voltage between phases.
4
NOTE:If the phase sequence is reversed, an error (4103) may occur when a test run is made, causing the unit to stop.
T urn on universal power supply at least 12 hours bef ore getting test run in order to carry current to crank case heater. If current-carrying hours are
5
too short, it may result in a malfunction of compressor.
11.2. Test run method
D
E
–
A
CENTRALLY CONTROLLED
CHECK
STAND BY
INDOOR UNIT
DEFROST
ADDRESS NO
CLOCK
˚C
ERROR CODE
OA UNIT ADDRESS NO
ON OFF
1Hr.
NOT AVAILABLE
˚C
FILTER
CHECK MODE
TEST RUN
ON/OFF
F
G
H
I
B
C
A Display panel
B Control panel
C Cooling/Heating select button 3, 4
D Check code indicator (see note 1)
E Test run remaining time indicator (see note 3)
F ON/OFF LED (Lights up in operation)
REMOTE CONTROLLER
PAR-F25MA
ON OFFCLOCK
TEMP. TIMER SET
G Indoor unit liquid pipe temperature indicator (See note 4)
H ON/OFF button 9
I Test run indicator
J Wind adjust button 6
K Test run button 2
L Air blow adjust button 5
FILTER
CHECK
TEST RUN
J
K
L
Operation procedure
1 Turn on universal power supply at least 12 hours bef ore getting started → displaying “HO” on display panel for about two minutes. The universal
power supply must be left on for at least 12 hours (with the crank case heater turned on).
2 Press [TEST RUN] button twice → displaying “TEST RUN” on display panel.
3 Press [Cooling/Heating] select button → make sure that air is blowing out.
Press [Cooling/Heating] select button to change from cooling to heating operation, and vice versa → make sure that warm or cold air is blowing
4
out.
5 Press [Wind] adjust button → make sure that air blow is changed.
6 Press [Up/Down Wind] or [Louver] button to change wind → Make sure that horizontal or downward blow is adjustable.
7 → Make sure that indoor unit fans operate normally.
8 Make sure that interlocking devices such as ventilator operate normally if any.
9 Press [ON/OFF] button to cancel test run → Stop operation.
NOTE 1: If check code is displayed on remote controller or remote controller does not operate normally, see page 32 or further.
NOTE 2: Test run automatically stops operating after two hours by activation of timer set to two hours.
NOTE 3: During test run, test run remaining time is displayed on time display section.
NOTE 4: During test run, temperature of liquid pipe in indoor unit is displayed on remote controller room temp. display section.
NOTE 5: When pressing [Wind] adjust button, depending on the model, “This function is not available” may be displayed on remote controller.
However, it is not a malfunction.
31
Page 32
11.3. How to cope with test run abnormality
1 A 4-digit check code is displayed on remote controller display panel if unit is stopped due to a trouble. Check to see causes of that
trouble.
1. Indoor unit
Check code Abnormality Check code Abnormality
2500 Water leakage abnormality
2502 Drain pump error
2503 Drain sensor error, Float switch on
5101 Air inlet sensor error
5102 Piping sensor error
5103 Piping sensor error in the gas side
6600 Duplicated unit address setting
6602 Transmission error
(Transmission processor hardware error)
2. Outdoor unit
Check code Abnormality Check code Abnormality
0403 Serial transmission malfunction
1102 Discharge temperature abnormality
1111 Low pressure saturated temperature abnormality (De-
tected by saturated temperature sensor)
1112 Low pressure saturated temperature abnormality
(Detected by liquid lev el detecting temperature sensor)
1113 Low pressure saturated temperature abnormality
(Detected by liquid lev el detecting temperature sensor)
1302 High pressure abnormality
1500 Excessive refrigerant replenishment
1505 Low pressure abnormality
4103 Reverse phase
4115 Power supply simultaneous signal abnormality
4200 VDC/IDC detection circuit error
4210 Overcurrent interruption
4220 Inverter bus line voltage low
4230 Overheat protection of radiator panel
4240 Overcurrent protection
4260 Cooling fan abnormality
5101 Discharge temperature sensor error (TH1)
5102 Low pressure saturated temperature error (TH2)
5103 Liquid surf ace detecting temperature sensor error (TH3)
5104 Liquid surf ace detecting temperature sensor error (TH4)
6603 Transmission error (Transmission route BUSY)
6606 Transmission and reception error
(Communication trouble with transmission processor)
6607 Transmission and reception error (No ACK error)
6608 Transmission and reception error (No responsive fr ame
error)
7101 Capacity code error
7111 Remote controller sensor error
5105 Piping temperature sensor error (TH5)
5106 Outdoor temperature sensor error (TH6)
5107 Subcool coil liquid outlet temperature sensor error (TH7)
5108 Subcool coil bypass outlet temperature sensor error
(TH8)
5110
5201 High-pressure sensor (HPS) error
5301 IDC sensor circuit error
6600 Duplicated unit address setting
6602 Transmission error (Transmission processor hardware
6603 Transmission error (Transmission route BUSY)
6606 Transmission and reception error
6607 Transmission and reception error (No ACK error)
6608 Transmission and reception error (No responsive fr ame
7100 Total capacity error
7101 Capacity code error
7102 Connecting unit number error
7105 Address set error
7109 Incorrect connection
7130 Incorrect setup
Inverter cooling plate temperature sensor error (THHS)
error)
(Communication trouble with transmission processor)
error)
32
Page 33
3. Remote controller
Check code Abnormality Check code Abnormality
6101 Unreadable response receiving error
6600 Duplicated unit address setting
6602 Transmission error (Transmission processor hardware
6607 Transmission and reception error (No ACK error)
6608 Transmission and reception error (No responsive frame
error)
error)
6603 Transmission error (Transmission route BUSY)
6606 Transmission and reception error (Communication trou-
ble with transmission processor)
2 Diagnostic switch (SW1) and the service LED on multi-controller board of indoor unit can be used to judge a malfunction of outdoor unit.
<Operation of self-diagnosis switch (SW1) and the service LED display>
Self-diagnosing
item
Relay output
display 1
(Lighting)
Check
a
display 1
(Blinking)
Relay output
display 2
Check
indoor unit
Check
indoor unit
Indoor unit
mode
Indoor unit
b
mode
Indoor unit
thermostat
Indoor unit
thermostat
SW1 setting
A
B
1234567 8910
C
A
B
1234567 8910
A
B
1234567 8910
A
B
1234567 8910
A
B
1234567 8910
A
B
1234567 8910
A
B
1234567 8910
A
B
1234567 8910
Display at LED lighting (blinking) Remarks
Flag 1 Flag 2 Flag 3 Flag 4 Flag 5 Flag 6 Flag 7 Flag 8
During
compres-
sor run
Crank
case
heater
∗
21S4
SV1
SV2
Always
lighting
0000 to 9999 (Alternate display of address and error code)
SSR
No.1
unit
No.9
unit
No.1
unit
No.9
unit
No.1
unit
No.9
unit
No.2
unit
No.10
unit
No.2
unit
No.10
unit
No.2
unit
No.10
unit
No.3
unit
No.11
unit
No.3
unit
No.11
unit
No.3
unit
No.11
unit
No.4
unit
No.12
unit
No.4
unit
No.12
unit
No.4
unit
No.12
unit
No.5
unit
No.13
unit
No.5
unit
No.13
unit
No.5
unit
No.13
unit
No.6
unit
No.14
unit
No.6
unit
No.14
unit
No.6
unit
No.14
unit
No.7
unit
No.15
unit
No.7
unit
No.15
unit
No.7
unit
No.15
unit
No.8
unit
No.16
unit
No.8
unit
No.16
unit
No.8
unit
No.16
unit
Flag 8 always lights
at microcomputer
power ON
∗ only for PUHY
Lights at emergency
stop in IC
Turns off by resetting
Lights at cooling
Blinks at heating
Turns off at stop/fan
Lights at thermostat
on Turns off at
thermostat off
Indoor unit
address
a Outdoor unit b Indoor unit
A ON B OFF C At factory shipment
A
B
1234567 8910
Displays in order the addresses (1 through 50) of all indoor units connected to the
outdoor unit.
33
Page 34
Displaying the service LED
Service LED (LD1)
• Error code display
Alternate display of error generating address and error code
Example At outdoor unit address 51, abnormal discharge temperature (Code 1102)
• Flag display
Example SV1 ON under compressor operation
11.4. Coping with remote controller abnormality
–
ON/OFF
ON OFF
CLOCK
˚C
ERROR CODE
OA UNIT ADDRESS NO
ON OFFCLOCK
TEMP. TIMER SET
1Hr.
NOT AVAILABLE
˚C
FILTER
CHECK MODE
TEST RUN
FILTER
CHECK
TEST RUN
CENTRALLY CONTROLLED
STAND BY
DEFROST
REMOTE CONTROLLER
PAR-F25MA
CHECK
INDOOR UNIT
ADDRESS NO
ABCDEFGH
A Flag 1 E Flag 5
B Flag 2 F Flag 6
C Flag 3 G Flag 7
D Flag 4 H Flag 8
A
Phenomenon
Unit does not operate and
display stays off even after
pressing remote controller
ON switch.
1
(Current-carrying indicator
does not light up)
“HO” indicator does not disappear. Unit does not operate even if the switch is
2
pressed.
Display comes on once but
3
disappears immediately after
a press of the switch.
Cause
(1) Outdoor unit power was not turned on.
(2) T r ansmission or remote controller cable
was shorted or connection failure.
(3) Power cable contact failure
(4) Remote controller was erroneously con-
nected to unit remote controller termi-
nal block.
(5) Too many remote controllers or indoor
units were connected.
(1) No transmission cable was connected
to transmission cable terminal block on
the indoor unit.
(2) Outdoor unit address was erroneously
set
(3) Indoor unit address was erroneously
set.
(1) Indoor unit power was not turned on.
A Display: Appears when current is carried
How to cope with abnormality
(a) Check voltage between remote controller terminals.
(i) Remote controller fails when voltage is 17 to 30 V.
(ii) If there is no voltage
• Check the number of remote controllers and indoor units connected
• Remove wire from transmission cable terminal bloc k (TB3) on
outdoor unit, and check voltage between terminals.
• If voltage is 17 to 30 V, check (2) and (4) at left.
• If there is no voltage, check (1) and (3) at left.
• Check all items at left.
• Check item at left.
34
Page 35
11.5. The following phenomena do not represent abnormality (emergency)
* The PUY cannot perform the heating operation.
Phenomenon
Indoor unit does not the perform cooling (heating) operation.
The auto vane runs freely.
Fan setting changes during heating.
Fan stops during heating operation.
Fan does not stop while operation has
been stopped.
No setting of fan while start SW has
been turned on.
Outdoor unit does not operate by turning switch on.
Indoor unit remote controller shows
“HO” indicator for about two minutes
when turning ON universal power supply.
Drain pump does not stop while unit has
been stopped.
Drain pump continues to operate while
unit has been stopped.
Display of remote controller
“Cooling (heating)” flashes
Normal display
Normal display
Defrost display
No lighting
Heat ready
Normal display
“HO” flashes
Light out
When another indoor unit is performing the heating (cooling) operation, the cooling (heating) operation is not performed.
Because of the control operation of auto vane, it may change over to
horizontal blow automatically from the downward blo w in cooling in case
the downward blow operation has been continued for 1 hour. At defrosting in heating, hot adjusting and thermostat OFF, it automatically
changes over to horizontal blow.
Ultra-low speed operation is commenced at thermostat OFF.
Light air automatically changes over to set value by time or piping temperature at thermostat ON.
The fan is to stop during defrosting.
Fan is to run for 1 minute after stopping to exhaust residual heat (only
in heating).
Ultra low-speed operation for 5 minutes after SW ON or until piping
temperature becomes 35°C, low speed operation for 2 minutes thereafter, and then set notch is commenced. (Hot adjust control)
When the outdoor unit is being cooled and the refrigerant is resting,
warming up operation is performed for at least 35 minutes to warm the
compressor.
During this time, only the fan operates.
System is being driven.
Operate remote controller again after “HO” disappear.
After a stop of cooling operation, unit continues to operate drain pump
for three minutes and then stops it.
Unit continues to operate drain pump if drainage is generated, even
during a stop.
Cause
35
Page 36
This product is designed and intended for use in the residential,
commercial and light-industrial environment.
WT02270X03
Please be sure to put the contact address/telephone number on
this manual before handing it to the customer.
HEAD OFFICE MITSUBISHI DENKI BLDG MARUNOUCHI TOKYO 100-8310 TELEX J24532 CABLE MELCO TOKYO
Printed in Japan
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