Impecca ISFC421524 Manual

Flex Series R410A GMV Multi
VFR System-Indoor Unit (For
North America) Compact Panel
Cassette Type Indoor Unit
Owner's Manual
Air Conditioners
Model:
ISMI-C15
 Thank you for choosing Air Conditioners, please read this owner’s manual carefully before operation
and retain it for future reference. If you have lost the Owner’s Manual, please contact the local agent or
visit www.Impecca.com for an electronic version.
 Impecca reserves the right to interpret this manual which will be subject to any change due to
product improvement without further notice.
 Impecca reserves the final right to interpret this manual.
v. 1.1
User Notice
◆ When operating, the entire capacity of the cooperating indoor unit should be not larger
than 150% of outdoor unit. Otherwise, it will cause the shortage of cooling (heating) capacity.
◆ A Breaker(or fuse) need to be installed in every indoor unit, and the capacity should
in according with indoor unit’s electrical parameter; all the indoor units are required to be
centralized controlled by a total Switch, this Switch can cut off the electric power supply in
case of emergency. The Breaker(or fuse) on each indoor units have the function of short
circuit prevention and abnormal overload avoiding, it should be connected in normal situation.
The total switch controlling the power supply of all the indoor units. Before clearing and
maintenance job being carried out to the indoor units, it is very important to turn off the total
power supply switch.
◆ In order to turn on the units successfully, the main power switch should be opened 8
hours before the operation.
◆ After receiving the turn off signal, every indoor unit will continue to work for 20-70sec to
make use of the rest cool air or the rest heat air in the heat exchanger, while preparing for the
next operation. And this is normal.
◆ When the selected operating mode of the indoor unit are clash with the operating
mode of the outdoor unit, the malfunction light will blink after 5s on the indoor unit or remote
controller showing that the operation clash, then the indoor unit will stop. At this time, change
the operation mode of the indoor unit to the one that would not clash with the outdoor operating
mode to make the operation normal. The cooling mode is not clash with the dry mode, while
the fan mode is not clash with any mode.
◆ The appliance shall not be installed in the laundry.
◆ An all-pole disconnection switch having a contact separation of at least 3mm in all poles
should be connected in fixed wiring.
◆ Information regarding transport/storage temperature (-25-55°C) is missing.
◆ Main switch provided by end user: main switch handle should be black or gray, it can be
locked in “OFF” position with padlock.
◆ The main disconnection device should be explained in user manual and the height
should be recommended at 0.6-1.7m. over current protection is required(UL 1995,CSA C22.2).
◆ The cooling range of the unit is the outdoor environment temp.-5~48°C DB, the heating
range of the unit( only for the heat pump type unit) is the outdoor environment temp. -15~27°C
WB.
This product must not be disposed together with the domestic waste. This product
has to be disposed at an authorized place for recycling of electrical and electronic
appliances.
Thank you for your selecting of Impecca air conditioner, please read this usage
and install instruction carefully and keep it well in order to use this unit correctly.
Contents
1 Safety Information�������������������������������������������������������������������������������������1
2 Install of The Compact Panel Cassette Type Indoor Unit�������������������������� 2
2.1 Schematic diagram of installation spaces��������������������������������������������������������� 2
2.2 Select install location of the indoor unit������������������������������������������������������������� 2
2.3 Important notice������������������������������������������������������������������������������������������������ 3
2.4 Dimension of ceiling opening and location of the hoisting screw (M10)������������ 3
2.5 Main body of hoisting air conditioner����������������������������������������������������������������� 3
2.6 Connection of the refrigerant pipe��������������������������������������������������������������������� 4
2.7 Drainage hose��������������������������������������������������������������������������������������������������� 5
2.8 Electrical wiring������������������������������������������������������������������������������������������������� 7
2.9 Install the panel������������������������������������������������������������������������������������������������� 8
3 Constitutes and Names of Parts of Compact Panel Cassette Type Indoor Unit�� 10
4 Working Temperature Range������������������������������������������������������������������� 11
5 Malfunction Debarring�����������������������������������������������������������������������������12
5.1 Check the following items before contacting maintenance center������������������ 12
5.2 Instruction�������������������������������������������������������������������������������������������������������� 13
5.3 The following circumstance are not malfunction��������������������������������������������� 13
5.4 After-sales Service������������������������������������������������������������������������������������������ 13
6 Maintenance Method�������������������������������������������������������������������������������14
6.1 Cleaning air filter��������������������������������������������������������������������������������������������� 14
6.2 Clean air inlet grille������������������������������������������������������������������������������������������ 15
6.3 Install and change of air purifier���������������������������������������������������������������������� 15
6.4 Clean Outlet vent and Surface Panel�������������������������������������������������������������� 16
6.5 Maintenance before or after usage season����������������������������������������������������� 16
Safety Information
1 Safety Information
Please read this manual carefully before use this unit, and operate it correctly according to the
guide in this manual.
Please take specially note to the meaning of these two marks:
Warning!: This mark means that it may cause casualty or badly heart if the operation is
incorrect.
Note!: This mark means that it may cause casualty or property loss if the operation is
incorrect.
Warning:
◆◆Do not adopt fuse with unsuitable capacity or adopt iron thread instead of fuse, otherwise
malfunction or fire may happened.
◆◆Cut down the main power switch immediately if malfunction (such as smell the burning odor
etc.) happened.
◆◆Maintain ventilation to prevent oxygen leakage in room.
◆◆Don’t insert finger or stick like things into discharge vent or outlet grill.
◆◆Please make sure that the unit is installed in the place that can bear the weight of it
adequately. If the place is not strong enough, the air conditioner may drop and cause casualty event.
◆◆Don’t spray or smear any oil paint or insecticide on the surface of unit, otherwise, fire may be
leaded.
(1). Do not refit the conditioner. Please contact the agency or prefect ional personnel to repair or
move the conditioner.
An all-pole disconnection switch having a contact separation of at least 3mm in all poles
should be connected in fixed wiring.
Note!:
◆◆Please check and make sure that the cord, drainage pipe and tubes are connected in the
correct way to prevent leakage of water, refrigerant, electric shock or fire.
◆◆The main power must connectable to the earth in order to assure the conditioner earthing
effectively and to prevent electric shock. Please don’t connect the earthing line with the gas pipe,
water pipe, lightening rod or the connecting line of telephone.
◆◆The air conditioner should be turned off at least after 5 mins’ operation; otherwise it would
affect the duration of the unit.
◆◆Don’t let the children operate the air conditioner.
◆◆Please don’t operate the unit by wet hand.
◆◆Please turn off the main power of the unit before cleaning the conditioner or change the filter.
◆◆Please cut off the main power if the conditioner will be used for a long time.
1
Install of The Compact Panel Cassette Type Indoor Unit
2 Install of The Compact Panel Cassette Type Indoor Unit
2.1 Schematic diagram of installation spaces
H
＞20
Wall
surface
Wall
surface
Wall
surface
≥1500
≥2500
≥1500
unit:mm
Model
H
ISMI-C15
260
Ground
surface
Fig.1
2.2 Select install location of the indoor unit
(1). Obstruct should put away from the intake or outlet vent of the indoor unit so that the airflow
can be blown though all the room.
(2). Make sure that the installation had accord with the requirement of the schematic diagram of
installation spaces.
(3). Select the place where can stand 4 times of the weight of the indoor unit and would not
increase the operating noise and oscillate.
(4). The horizontally of the installation place should be guaranteed.
(5). Select the place where easy drain condensated coagulated water, and easy connect with
outdoor unit.
(6). Make sure that there are enough space for care and maintenance. Make sure that the
weight between the indoor unit and ground is above 2500mm.
(7). When installing the steeve bolt, check if the install place can stand the weight 4 times of the
unit’s. If not, reinforce before installation. (Refer to the install cardboard and find where should be
reinforced)
Note!
There will be lots of lampblack and dust stick on the acentric, heat exchanger and water pump
in dining room and kitchen, which would reduce the capacity of heat exchanger, lead water leakage
and abnormal operation of the water pump. The following treatment should be taken under this
circumstance:
(8). Ensure that the smoke trap above cooker has enough capacity to obviate lampblack to
prevent the indraft of the lampblack by the air conditioner.
(9). Keep the air conditioner far from the kitchen so that the lampblack would not be indraft by
the air conditioner.
2
Install of The Compact Panel Cassette Type Indoor Unit
2.3 Important notice
◆◆To guarantee the good performance, the unit must be installed by professional personnel
according with this instruction.
◆ Please contact the local Impecca special nominated repair department before installation.
Any caused by the unit that is installed by the department that is not special nominated
malfunction
by Impecca would not deal with on time by the inconvenience of the business contact.
2.4 Dimension of ceiling opening and location of the hoisting screw (M10)
650
570
400
570 604 650
Fig.2 Install dimension of mode
◆◆The drilling of holes in the ceiling must be done by the professional personnel.
Ceiling
(160)
Installation stands for main body of the unit
Above 20
Fig.3
Notes: The dimension for the ceiling openings with * marks can be as large as 610mm. But the
overlapping sections of the ceiling and the decorated surface boards should be maintained at no
less than 20mm.
2.5 Main body of hoisting air conditioner
(1). The primary step for install the indoor unit.
◆◆When attach the hoisting stand on hoisting screw, do use nut and gasket individually at the
upper and lower of the hoisting stand to fix it. The use of gasket anchor board can prevent gasket
break off.
(2). Use install cardboard.
◆◆Please refer to the install cardboard about the dimension of ceiling opening.
◆◆The central mark of the ceiling opening is marked on the install cardboard.
3
Install of The Compact Panel Cassette Type Indoor Unit
◆◆Install the install cardboard on the unit by bolt (3 piece), and fix the angle of the drainage pipe
at the outlet vent by bolt.
(3). Adjust the unit to the suitable install place. (Refer to the fig.3)
(4). Check if the unit is horizontal.
◆ Inner drainage pump and bobber switch are included in the indoor unit, check if 4 angle of
every unit are horizontal by water lever. (If the unit is slant toward the opposite of the coagulate
water flow, there may be malfunction of the bobber switch and lead water drop.)
(5). Backout the gasket anchor board used to prevent gasket break off and tighten the nut on it.
(6). Backout the install cardboard.
Fig.4
Note!: Please do tighten the nuts and bolts to prevent air conditioner break off.
2.6 Connection of the refrigerant pipe
◆ When connect the pipe to the unit or backout it from the unit, please do use both spanner and
torque wrench. as shown in fig.5.
◆ When connect, smear both inside and outside of the flare nut with freeze motor oil, screw it
by hand and then tighten it with spanner.
◆ Refer to form 1 to check if the wrench had been tightened (too tight would mangle the nut
and lead leakage).
◆ Examine the connection pipe to see if it had gas leakage, then take the treatment of heat
insulation, as shown in the fig.5.
◆ Only use median sponge to entwine the wiring interface of the gas pipe and heat preservation
sheath of the gas collection tube.
4
Install of The Compact Panel Cassette Type Indoor Unit
Smear freeze motoroil
here
Median sponge (attachment)
(entwine the wiring interface
with seal mat)
Thread fasten(x4)
Torque wrench
Heat preservation
sheath of liquid inlet
tube (attachment) (for
liquid tube)
Spanner
Flare nut
Wiring interface
Gas collection tube
Liquid inlet tube
Heat preservation
sheath of gas collection
tube (attachment)(for
gas tube)
Fig.5
Form 1: The tightening torque needed for tightening nut
Diameter（Inch）
Surface thickness（mm）
Tightening torque (N·m)
φ1/4’’
≥ 0.5
15-30 (N·m)
φ3/8’’
≥ 0.71
30-40 (N·m)
φ1/2’’
≥1
45-50 (N··m)
φ5/8’’
≥1
60-65 (N·m)
φ3/4’’
≥1
70-75 (N··m)
2.7 Drainage hose
(1). Install the drain hose
◆ The diameter of the drain hose should be equal or bigger than the connection pipe’s. ( The
diameter of polythene pipe: Outer diameter 25mm Surface thickness ≥ 1.5mm)
◆ Drain hose should be short and drooping gradient should at less 1/100 to prevent the
formation of air bubble.
◆ If drain hose cannot has enough drooping gradient, drain raising pipe should be added.
◆ To prevent bent of the drain hose, the distance between hoisting stand should is 1 to 1.5m.
Fig.6
◆ Use the drain hose and clamp attached. Insert the drain hose to the drain vent, and then
tighten the clamp.
◆ Entwine the big sponge on the clamp of drain hose to insulate heat.
◆ Heat insulation should be done to indoor drain hose.
5
Install of The Compact Panel Cassette Type Indoor Unit
Sponge(attachment)
Clamp(attachment)
Clamp
Sponge (gray)
Drain hose
Below 4mm
Fig.7
Drain stepup pipe note
◆ The install height of the drain raising pipe should less than 280mm.
◆ The drain raising pipe should form a right angle with the unit, and distance to unit should not
beyond 300mm.
Fig.8
Instruction
◆ The slant gradient of the attached drain hose should be within 75mm so that the drain hole
doesn’t has to endure the unnecessary outside force.
Fig.9
◆ Please install the drain hose according to the following process if several drain hoses join
together.
Fig.10
(2). Check the smoothness of drain after installation.
◆ Check the drain state by immitting 600cc water slowly from the outlet vent or test hole.
◆ Check the drain in the state of refrigerating after installation of the electric circuit.
6
Install of The Compact Panel Cassette Type Indoor Unit
Fig.11
2.8 Electrical wiring
Note:The power of the entire indoor unit must be connected in outdoor unit.
◆ About the electrical wiring, please see the circuit diagram attached with the unit.
◆ All the installation of electrical wiring must be done by professional personnel.
◆ Please do take the earthing treatment.
Wiring method of connection unit and controller
◆ Connection wiring (communication):
① Open electric box cover, drag the wiring (communication)from the rubber plug A, and impact
them well individually by impact fastener.
② Wiring according to the indoor side circuit diagram.
◆ Fix the impact fastener after connection.
◆ Entwine the small sponge on the electric wire( do entwine it to prevent condensation).
◆ Impact tightly by impact fastener after connection and then fit on the electric box.
◆ Connect the 3 cord rubber wire to the counter terminal of the 3 way terminal board.
The power cord reference Power cord standard recommending table
Fig.12
Power cord standard recommending table
Power Supply
(V, Ph, Hz)
Min. Sectional Area of Min. Sectional Area of
Earth Wire(AWG)
208~203V-1Ph-60Hz UL1015 AWG 18*1
7
Power Cord(AWG)
UL1015 AWG 18*3
Install of The Compact Panel Cassette Type Indoor Unit
2.9 Install the panel
(1). Set the panel to the indoor unit body by matching the position of the swing flap motor of the
panel to the piping position of the panel to the piping position of the indoor unit as shown by fig.13.
(2). Install the panel
① .Install the panel on the indoor unit temporarily. When install, hang the latch on the hook
that is located on the opposite side of the swing flap on the panel of the indoor unit. (2
positions)
② .Hang the remaining 2 latches to the hooks on the sides of the indoor unit.(Be careful not to
let the swing motor lead wire get caught in the sealing material.)
③ .Screw the 4 hexagon head screws under the latches in about 15mm. (The panel would
rise)
④ .Adjust the panel by turning it toward the direction pointed by the arrow as shown in fig.13,
so that the adjust board connect the ceiling well.
⑤ .Tighten the screws until the thickness of the sealing material between panel and indoor
unit reduced to 5-8mm.
Fig.13
Notes:
① .Improper screwing of the screws may cause the troubles shown in fig.14.
8
Install of The Compact Panel Cassette Type Indoor Unit
Air leak
Air leak from ceiling
Water condensatation, water drop
Fig.14
② .If gap still exist between ceiling and decoration panel after tightening the screws, readjust
the height of the indoor unit. (As shown in fig.15)
If the raising lever and drain hose are
not affect, can adjust the height of
indoor unit by the hole on the corner
of panel.
Gaps are not allowed
Fig.15
※ After fixing, be sure no gap left between the ceiling and the panel.
③ .Wiring of the decoration panel (Fig.16)
Connect the joints for swing flap motor lead wire (at 2 places) installed on the panel.
At body
At body
At pane
Fig.16
9
At pane
Constitutes and Names of Parts of Compact Panel Cassette Type Indoor Unit
3 Constitutes and Names of Parts of Compact Panel Cassette Type
Indoor Unit
10
Working Temperature Range
4 Working Temperature Range
Working Temperature Range
Indoor side state
Outdoor side stae
Dry bulb
temp. ℃
Wet bulb
temp. ℃
Dry bulb
temp. ℃
Wet bulb
temp. ℃
Rated Cooling
27
19
35
24
Max. cooling
32
23
48
26
Min. cooling
21
15
18
—
Rated Heating
20
15
7
6
Max. heating
27
—
24
18
Min. heating
20
15
－ 15
－ 16
11
Malfunction Debarring
5 Malfunction Debarring
Warning!
◆ Cut down the main power switch immediately if malfunction (such as smell the burning odor
etc.) happened, and then contact service center. If the abnormal state is maintained, the unit may be
damaged or electric shock or fire may be happened.
◆ Do not refit the conditioner. Please contact service center to repair or move the conditioner.
5.1 Check the following items before contacting maintenance center
Phenomena
Reason
Remedial Measures
Blow of fuse or breaker
Change fuse or close breaker
Power cut
Air conditioner doesn’t
run at all
Don’t connect with power
Low batteries of wireless remote
controller
Connect power well
Change new batteries
Signal could be received within
remote control area
8m
Air conditioner runs
Blockage in inlet or outlet vent of
indoor or outdoor unit
Blockage in inlet or outlet vent of
indoor or outdoor unit
Improper of temp. setting
Low setting of fan speed
Incorrect of wind direction
heating
supply
Wireless remote controller exceed
but stops immediately
Abnormal cooling or
Restart when there is power
Door or window opened
Direct sun burn
Clean out blockage
Clean out blockage
Adjust settings in wireless remote
controller
Adjust settings in wireless remote
controller
Adjust settings in wireless remote
controller
Close
Hang curtain or jalousie before
windows
Too many people in room
Too many heater in room
Filter blocked by dirt
12
Clean filter
Malfunction Debarring
5.2 Instruction
If problem still cannot found out after above checking, please contact service center and instruct
phenomena and model.
5.3 The following circumstance are not malfunction
“Malfunction”
Air conditioner doesn’t
Reason
Start up unit immediately after
The overload protects switch
turned off
makes it run after 3 minutes delay.
run
When opening power
Mist is blown from air
When cooling
conditioner
Slight click sound heard once
Noise is heard from
air conditioner
Run for about 1 minute without
other actions
The high humidity air in room is
cooled rapidly
Sound of initialization for electric
begin running
expand valve
Hissing sound heard continuously
The sound for gas refrigerant
when cooling
flowing in the unit
Hissing sound heard when staring
The sound for gas refrigerant
or stopping
stops flow
Slight hissing sound heard when
Sound for running of drainage
running or after running
Creak sound heard when running
or after running
Dust be blown for air
Started up after long time’s doesn’t
conditioner
runs
system
The grating sound caused by
expands of panel and other parts
for the change of temperature
Dust in indoor unit be blown out
This is because when air
Odor gives out from
air conditioner
When running
conditioning, odors or cigarette
smoke from the room that was
sucked in is discharged again.
5.4 After-sales Service
When having quality or other problems when purchasing air conditioner, please contact the local
service center.
13
Maintenance Method
6 Maintenance Method
When air conditioner won’t be used for a long time, please cut off the main power supply
of air conditioner.
Warning!
◆ Do turn off the unit and cut off the main power supply when cleaning the air conditioner,
otherwise electric shock or harm may happen.
◆ It is forbidden to wash air conditioner by water rinsing, otherwise electric shock may happen.
6.1 Cleaning air filter
Air filters should be cleaned by professionals with proper operation to ensure personal safety.
When the usage environment has lots of dust, air filter should be cleaned more frequently (about
once 6 months).
(1). Open air inlet grille
Loosen two screws on the air inlet grille with a screwdriver. And pull the 2 handle on air inlet
grille at the same time with the direction showed by arrow in fig.17, pull down slowly. (Reverse when
closing)
(2). Disassembly air filter
As shown in fig.18, pull the handle behind air inlet grille, raise it and disassembly. Then
discharge the 3 purifier fixed on filter.
purifier
Fig.17
Fig.18
(3). Clean
Adopts cleaner or water to wash filter; if the filter is too dirty ( like oil stain on it ), adopts warm
water ( lower than 45℃ ) with neutral scourer to clean it, then dry it in the shade.
Note ！
Do not clean the filter by hot water whose temp. is higher than 45 ℃ to prevent fade or
deformation.
Do not burn it on fire or the filter would catches fire or deformation.
(4). Install air filter
Fix the 3 purifiers on filter, install filter on the several bulges on top of air inlet grille, pull the
handle behind air inlet grille toward inside to fix filter. As shown in fig.19.
14
Maintenance Method
(5). Close air inlet grille (Refer to the 1st step)
Maintenance Method
Fig.19
Fig.20
6.2 Clean air inlet grille
(1). Open air inlet grille (the same with the 1st step of Clean Air Filter)
(2). Take out air filter (the same with the 2nd step of Clean Air Filter)
(3). Take out air inlet grille
Open air inlet grille for an angle of 45°, as shown in fig.20, rise it.
(4). Clean
Clean it by pubescence brush, water and neutral cleaning, then throw water or dry it.
Note ！
Do not use water above 45℃ to wash the panel to prevent fade or deformation.
(5). Install air inlet grille (refer to 3rd step)
(6). Install air filter (refer to the 4th step of Clean Air Filter)
(7). Close air inlet grille (refer to the 1st step)
6.3 Install and change of air purifier
(1). Open air inlet grille (the same the 1st step of Clean Air Filter)
(2). Disassembly purifier
As shown in fig.21, disassembly air filter, screw out fixing bolts fixed on purifier on filter, then
purifier could be disassembly.
(3). Take out the package sack of static fiber net filter, then install the filter in stand of purifier,
and fix purifier on air filter.
(4). Install air filter (the same with the 4th step of Clean Air Filter)
Air filter
Purifier filter
Stand for purifier
Fix bolt of
purifier
Fig.21
15
Maintenance Method
Function and usage period for air purifying
◆ Could adsorb CO, CO2, benzene, aldehydes and odor of gasoline etc..
◆ Could adsorb deleterious material that is smaller than 1μm in air, as dust, pollen, bacteria,
and virus.
◆ Usage period is 6 months to 1 year. If it is necessary to be changed, purchase new purifier in
the nearest Impecca special engaged maintenance
center. 6.4
Clean Outlet vent and Surface
◆ Clean the surface panel by soft dry cloth or wet cloth with neutral scourer.
Panel
◆ It is forbidden to clean surface panel by gasoline, benzene, diluents, cleansing powder etc..
◆ If the guide louver is too dirty, it may be removed to be cleaned. (As narrated below)
Disassembly and install of guide louver
(1). Disassembly guide louver
Screw bolts in both end of guide louver to loose.
Note ！
Do not wipe guide louver powerfully when cleaning, otherwise fluff on surface would fall off.
(2). Install guide louver
Rotate guide louver slightly could install the protruding edge of both end into grooves on both
end of guide louver, and then tighten bolts.
6.5 Maintenance before or after usage season
Check before the usage season
◆ Check if there is blockage in inlet or outlet vent of air conditioner.
◆ Check if the earthing wire had earthed reliably.
◆ Check if the air filter had been installed well.
◆ In order to start up the air conditioner smoothly after long time’s turned off, turn on the main
power supply 8 hours before turning on the air conditioner.
Maintenance after usage season
◆ Clean filter and body of air conditioner.
◆ Cut off the main power supply of air conditioner.
◆ The cooling or heating capacity and sound level are tested before leaving factory.
◆ If the parameter changed, refer to the data offered on nameplate.
6.6 CUSTOMER SUPPORT
Before contacting customer support, please see the troubleshooting guide above.
Visit our website to contact us, find answers to Frequently Asked Questions, and for other resources which
may include an updated version of this user's guide.
 WWW.IMPECCA.COM
If you wish to contact us by phone, please be sure to have your model number and serial number ready
and call us between 9:00am and 6:00pm ET, at +1 866-954-4440.
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16
© 2016 Impecca, a division of LT Inc., Wilkes Barre, PA.
Flex Series R410A GMV Multi VRF
Cassette Type Indoor Unit
(For North America)
Owner's Manual
Commercial Air Conditioners
Model: ISMI-C24
Thank you for choosing Commercial Air Conditioners, please read this
owner’s manual carefully before operation and retain it for future reference.
User Notice
◆ The total capacity of the indoor units which runs at the same time can not exceed 150% of
that of outdoor units; otherwise, the cooling (heating) effect of each unit would be poor.
◆ A breaker (or fuse) needs to be installed in every indoor unit, and the capacity should be in
accordance with indoor unit’s electrical parameter; all the indoor units are required to be centralized
controlled by a main switch, this switch can cut off the electric power supply in case of emergency.
The breaker (or fuse) on each indoor unit has the function of preventing short circuit and avoiding
abnormal overload, it should be connected in normal situation. The main switch controls the power
supply of all the indoor units. Before cleaning and maintaining the indoor units, it is very important
to turn off the main power supply switch.
◆ In order to turn on the units successfully, the main power switch should be opened 8 hours
before the operation.
◆ It is a normal phenomenon that the indoor unit will still run for 20-70 seconds after the indoor
unit receives the "stop" signal so as to make full use of after-heat for the next operation.
◆ When the running modes of the indoor and outdoor units conflict, it will be indicated on the
display of the wired controller in five seconds and then the indoor unit will stop. At this time, change
the operation mode of the indoor unit to the one that would not clash with the outdoor operating
mode to make the operation normal. The HEAT mode conflicts with each of the COOL mode, DRY
mode and FAN mode, while the COOL mode, DRY mode and FAN mode are compatible between
each other.
◆ The appliance shall not be installed in moist places, such as laundry.
◆ An all-pole disconnection switch having a contact separation of at least 3mm in all poles
should be connected in fixed wiring.
◆ Main switch is provided by end user. Main switch knob should be in black or gray, it can be
locked on “OFF” with padlock.
◆ The instruction of main power switch should be included in user manual and the
recommended installing height should be at 0.6-1.7m. And also over current protection is required
(UL 1995,CSA C22.2).
◆ The outdoor ambient temperature of the unit under cooling mode ranges from -5~48°C DB.
The outdoor ambient temperature of the unit (only for the heat pump type unit) under heating mode
ranges from -15~27°C WB.
◆ This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
This product must not be disposed together with the domestic waste. This product has
to be disposed at an authorized place for recycling of electrical and electronic appliances.
Thank you for selecting Impecca air conditioner. Before use, please read this
manual carefully and keep it properly for furthur reference.
Contents
1 Safety Precautions������������������������������������������������������������������������������������������ 1
2 Installation of the Cassette Type Indoor Unit��������������������������������������������������� 2
2.1 Schematic Diagram of Installation Spaces������������������������������������������������������������ 2
2.2 Installation Location of the Indoor Unit������������������������������������������������������������������� 2
2.3 Important Notice:���������������������������������������������������������������������������������������������������� 3
2.4 Dimension of Ceiling Opening and Location of the Hoisting Screw (M10)������������ 3
2.5 Main Body of Hoisting Air Conditioner������������������������������������������������������������������� 4
2.6 Connection of the Refrigerant Pipe������������������������������������������������������������������������ 4
2.7 Drain Hose������������������������������������������������������������������������������������������������������������� 5
2.8 Electrical wiring������������������������������������������������������������������������������������������������������ 7
2.9 Install the Panel����������������������������������������������������������������������������������������������������� 9
3 Parts and Components of Cassette Type Indoor Unit ��������������������������������� 12
4 Working Temperature Range������������������������������������������������������������������������� 13
5 Trouble Shooting������������������������������������������������������������������������������������������� 14
6 Maintenance Method������������������������������������������������������������������������������������� 16
6.1 Cleaning Air Filter������������������������������������������������������������������������������������������������� 16
6.2 Clean Air Inlet Grille��������������������������������������������������������������������������������������������� 17
6.3 Install and Change of Air Purifier������������������������������������������������������������������������� 17
6.4 Clean Outlet Vent and Surface Panel������������������������������������������������������������������ 18
6.5 Maintenance before or after Seasonal Use��������������������������������������������������������� 18
Flex Series for North America
1 Safety Precautions
Please read this manual carefully before using this unit, and operate it correctly according to
the guide in this manual.
Please take special attention to the meaning of these two marks:
Warning! It indicates improper operation which will lead to human casualty or severe injury.
Note! It indicates improper operation which will lead to injury or property damage.
Warning:
◆ Do not adopt fuse with unsuitable capacity or adopt iron wire instead of fuse, otherwise
malfunction or fire may happen.
◆ Turn off the main power switch immediately if malfunction (such as smell the burning odor
etc.) happens.
◆ Keep good ventilation in the room to avoid oxygen deficit.
◆ Don’t insert finger or stick-like objects into the air inlet/outlet grille.
◆ Please install the unit in a place where is strong enough to withstand the weight of the unit;
otherwise, the unit would fall down and cause injury or death.
◆ Don’t apply or spray and paint or insecticide on the surface of unit, otherwise, fire may
happen.
◆ Never refit the unit and contact the sales agent or the professional installation personnel for
the repair or relocation of the unit.
An all-pole disconnection switch having a contact separation of at least 3mm in all poles
should be connected in fixed wiring.
Note:
◆ Before using the unit, please check if the piping and wiring are correct to avoid water
leakage, refrigerant leakage, electric shock, or fire etc.
◆ The main power supply must be earthed soundly to avoid the hazard of electric shock and
never connect this earth wire to the gas pipe, running water pipe, lightening rod or phone cable's
earth lead.
◆ Turn off the unit after it runs at least five minutes; otherwise its service life will be shortened.
◆ Don’t allow children operate the air conditioner.
◆ Don’t allow children operate the air conditioner.
◆ Please turn off the main power of the unit before cleaning the conditioner or change the filter.
◆ Please cut off the main power if the conditioner will not be used for a long time.
1
Flex Series for North America
2 Installation of the Cassette Type Indoor Unit
2.1 Schematic Diagram of Installation Spaces
H
＞20
Wall
surface
Wall
surface
Wall
surface
unit:mm
Model
H
ISMI-C24
260
Ground
surface
Fig.1
2.2 Installation Location of the Indoor Unit
(1). Obstruct should be taken away from the inlet or outlet of the indoor unit so that the airflow
can be blown though all the room.
(2). Ensure the installation work is done as per the schematic diagram of installation spaces.
(3). Select a place where is strong enough to withstand 4 times of the weight of the indoor unit;
otherwise it would incur vibration and noise.
(4). Ensure the installation place is at horizontal level.
(5). Select a place where the condensate water is easily drained out and the drain pipe can be
easily connected with outdoor unit.
(6). Make sure that there is enough space for care and maintenance. Make sure that the
distance between the indoor unit and ground is above 1800mm.
(7). When installing the steeve bolt, check if the installing place can stand 4 times of the weight
of the units. If not, reinforce before installation. (Refer to the installation cardboard and find
where should be reinforced)
Note!
There will be lots of lampblack and dust sticking on the acentric, heat exchanger and water
pump in dining room and kitchen, which would reduce the capacity of heat exchanger, lead water
leakage and abnormal operation of the water pump. The following treatment should be taken
under this circumstance:
1). Ensure that the smoke trap above cooker has enough capacity to obviate lampblack to
prevent the indraft of the lampblack by the air conditioner.
2
Flex Series for North America
2). Keep the air conditioner far from the kitchen so that the lampblack would not be indraft by
the air conditioner.
2.3 Important Notice:
◆ To guarantee the good performance, the unit must be installed by technician according with
this instruction.
◆ Please contact the local Impecca special nominated repair department before installation.
Any caused by the unit that is installed by the department that is not special nominated
malfunction
by Impecca would not deal without time by the inconvenience of the business contact.
840(Indoor unit)
780(Gaps between hoisting screw rods)
890*(Ceiling opening)
950(Decorated surface boards)
2.4 Dimension of Ceiling Opening and Location of the Hoisting Screw (M10)
Refrigerant pipe
Hoisting screw (X4)
680(Gaps between hoisting screw rods)
840(Indoor unit)
890(Ceiling opening)
950(Decorated surface boards)
A
Fig.2 Install Dimension of Model ISMI-C24
◆ The drilling of holes in the ceiling must be done by the technicians.
Ceiling
(160)
Installation stands for main body of the unit
Above 20
Fig.3
Notes: The dimension for the ceiling openings with * marks can be as large as 910mm. But the
overlapping sections of the ceiling and the decorated surface boards should be maintained at no
less than 20mm.
3
Flex Series for North America
2.5 Main Body of Hoisting Air Conditioner
(1). The primary step for installing the indoor unit.
◆ When attach the hoisting stand with hoisting screw, do use nut and gasket respectively at
the upper and lower of the hoisting stand to fix it. The use of gasket anchor board can prevent
gasket from breaking off.
(2). Use installation cardboard
◆ Please refer to the installation cardboard about the dimension of ceiling opening.
◆ The central mark of the ceiling opening is marked on the installation cardboard.
◆ Install the installation cardboard on the unit by bolts (3 pieces), and fix the angle of the
drainage pipe at the outlet vent by bolt.
(3). Adjust the unit to the suitable install place. (Refer to the Fig.4)
(4). Check if the unit is horizontal.
◆ Inner drainage pump and float switch are included in the indoor unit, check if 4 angle of
every unit are horizontal by water level. (If the unit is slant toward the opposite of the coagulate
water flow, there may be malfunction of the float switch and lead water drop.)
(5). Back-out the gasket anchor board used to prevent gasket from breaking off and tighten the
nut on it.
(6). Back-out the installation cardboard.
Nut(supplied at scene)
Gasket(attachment)
Insert
Hoisting stand
Gasket anchor board(attachment)
Tighten(double nuts)
[Fix the hoisting stand firmly]
[Fix the gasket firmly]
Bolt of one of the angle of outlet pipe is
fix on the angle of the drainage solt
Center of the ceiling
Install cardboard
opening
Water lever
Polyethylene pipe
Bolt(attachment)
Bolt(attachment)
[Fix the install cardboard]
Fig.4
Note!
● Please do tighten the nuts and bolts to prevent air conditioner from falling down.
2.6 Connection of the Refrigerant Pipe
◆ When connect the pipe to the unit or remove it from the unit, please do use both spanner
4
Flex Series for North America
and torque wrench. as shown in Fig.5.
◆ When connect, smear both inside and outside of the flare nut with freeze motor oil, screw it
by hand and then tighten it with spanner.
◆ Refer to Table 1 to check if the nut has been tightened (tighten too greatly would damage the
nut and lead to leakage).
◆ Examine the connection pipe to see if it has gas leakage, then take the treatment of heat
insulation, as shown in the Fig.5.
◆ Only use medium-sized sponge to entwine the wiring interface of the gas pipe and heat
insulation of the gas collection tube.
Smear freeze motoroil
here
Median sponge (attachment)
(entwine the wiring interface
with seal mat)
Thread fasten(X4)
Torque wrench
Heat preservation
sheath of liquid inlet
tube (attachment) (for
liquid tube)
Spanner
Gas collection tube
Wiring interface
Flare nut
Heat preservation
sheath of gas collection
tube (attachment)(for
gas tube)
Liquid inlet tube
Fig.5
Table 1: The moment of torque for tightening nut
Diameter（Inch）
Surface thickness（mm）
Moment of torque (N·m)
φ1/4’’
≥ 0.5
15-30 (N·m)
φ3/8’’
≥ 0.71
30-40 (N·m)
φ1/2’’
≥1
45-50 (N··m)
φ5/8’’
≥1
60-65 (N·m)
φ3/4’’
≥1
70-75 (N··m)
If the specification of the outdoor unit pipe joint does not conform to that of the indoor unit, then
the joint specification of the outlet pipe of the indoor unit takes precedence. A reducing nipple shall
be installed at the joint of the outdoor unit so as to make the joint of the outdoor unit compatible
with that of the indoor unit.
2.7 Drain Hose
(1). Install the drain hose
◆ The diameter of the drain hose should be equal or larger than that of connection pipes. ( The
diameter of polythene pipe: Outer diameter: 25mm; Surface thickness ≥1.5mm)
◆ Drain hose should be short and drooping gradient should at least 1/100 to prevent the
5
Flex Series for North America
formation of air bubble.
◆ If drain hose cannot has enough drooping gradient, drain raising pipe should be added.
◆ To prevent bent of the drain hose, the distance between hoisting stand and the drain hose
should be 1 to 1.5m.
1-1.5m
(Correct)1/100 or more gradient
(Wrong)
Fig.6
◆ Use the drain hose and clamp attached. Insert the drain hose to the drain vent, and then
tighten the clamp.
◆ Wrap clamp with sponge on the drain hose to insulate heat.
◆ Heat insulation should be done to indoor drain hose.
Sponge(attachment)
Clamp(attachment)
Clamp
Sponge (gray)
Drain hose
Below 4mm
Fig.7
Drain Stepup Pipe Note
◆ The installation height of the drain raising pipe should less than 280mm.
◆ The drain raising pipe should form a right angle with the unit, and distance to unit should not
beyond 300mm.
Roof
Within 300mm
1-1.5m
Drain hose(attachment)
Hoisting stand
Drain raising hose
220mm
CeilingC
Below 500mm
Below 280mm
lamp(attachment)
Fig.8
Instruction
◆ The fall of the attached drain hose should be within 75mm so that the joint of the drain pipe
doesn’t have to endure the unnecessary outside force.
6
Below 500mm
Drain hose(attachment)
Below 75mm
Flex Series for North America
Fig.9
◆ Please install the drain hose according to the following process if several drain hoses join together.
Above 100mm
T-tie in join drain hose
The specs of the selected jion drain hose should fits the running capacity of the unit
Fig.10
(2). Check the drain state after installation
◆ Check the drain state by immitting 600ml water slowly from the outlet vent or test hole.
◆ Check the drain state under cooling mode after electric circuit installation work is done.
Drain hose
[Way of immiting]
Drain vent for repair use
(plasticstopper is included)
(drain the waterin waterspout
by this outlet vent）
Above 100m
Test hole cover
Test hole
[Immiting water from the rest hole]
Plastic water pot (The length of
the pipe should be about 100mm)
[Immiting water from the outlet vent terminal]
Fig.11
2.8 Electrical wiring
Note:The power of the entire indoor unit must be connected with outdoor unit.
◆ About the electrical wiring, please see the circuit diagram attached with the unit.
◆ All the installation of electrical wiring must be done by technicians.
◆ Please do take the earthing treatment.
Wiring Method of Connection Unit and Controller
7
Flex Series for North America
◆ Connection wiring (communication):
① Open electric box cover(1), drag the wiring (communication)from the rubber plug A, and
impact them well individually by impact fastener.
② Wiring according to the indoor side circuit diagram.
◆ Fix the impact fastener after connection.
◆ Wrap the small-sized sponge on the electric wire (do entwine it to prevent condensation).
◆ Impact tightly by impact fastener after connection and then fit on the electric box (1) and (2).
◆ Put the 4-core cable through the hole of the chassis and the bottom of the appliance
upward, and then connect the power line and the communication line from the outdoor unit to the
corresponding terminals N(1), 2, 3 , and grounding terminal of the indoor unit. Wiring shall be done
properly as per the wiring diagram. (Note: Be sure the wring terminals A/B/C/D and piping joints A/
B/C/D of the indoor unit match with that of the outdoor unit respectively).
To indoor unit
Power supply 3 way
terminal board 4 core
rubber wire
To indoor unit
Impact fastener
Cable-cross loop
Electric box cover(2)
Do seal here to prevent
water inleakage from here
Cable-cross loop
Electric box cover(1)
Fig.12
GWHD(36)ND3AO
INDOOR UNIT D
POWER
INDOOR UNIT C
INDOOR UNIT B
INDOOR UNIT A
N L
XT
XT
OUTDOOR UNIT
8
XT2
Flex Series for North America
GWHD(42)ND3AO
INDOOR UNIT E
XT6
G
INDOOR UNIT D
XT5
G
G
INDOOR UNIT B
OUTDOOR UNIT
INDOOR UNIT C
XT4
XT3
G
INDOOR UNIT A
XT2
G
L
N
POWER
XT1
2.9 Install the Panel
1. Set the panel to the indoor unit body by matching the position of the swing flap motor of the
panel to the piping position of the panel to the piping position of the indoor unit as shown by Fig.13.
2. Install the panel
(1). Install the panel on the indoor unit temporarily. When install, hang the latch on the hook that
is located on the opposite side of the swing flap on the panel of the indoor unit. (2 positions)
(2). Hang the remaining 2 latches to the hooks on the sides of the indoor unit.(Be careful not to
let the swing motor lead wire get caught in the sealing material.)
9
Flex Series for North America
(3). Screw the 4 hexagon head screws under the latches in about 15mm. (The panel would
rise)
(4). Adjust the panel by turning it toward the direction pointed by the arrow as shown in Fig.13,
so that the adjust board connect the ceiling well.
(5). Tighten the screws until the thickness of the sealing material between panel and indoor unit
reduced to 5-8mm.
Hook
Latch
Piping position
Swing flap motor
Sealing material
Indoor unit
Ceiling
5mm to 8mm
Air outlet vent
Decoration panel
Fig.13
Notes:
① .Improper screwing of the screws may cause the troubles shown in Fig.14.
10
Flex Series for North America
Air leak
Air leak from ceiling
Water condensatation, water drop
Fig.14
② .If gap still exist between ceiling and decoration panel after tightening the screws, readjust
the height of the indoor unit. (As shown in Fig.15)
If the raising lever and drain hose are
not affect, can adjust the height of
indoor unit by the hole on the corner
of panel.
Gaps are not allowed
Fig.15
※ After fixing, be sure that there is no gap between the ceiling and the panel.
③ .Wiring of the decoration panel (Fig.16)
Connect the joints for swing flap motor lead wire (at 2 places) installed on the panel.
At body
At body
At pane
Fig.16
11
At pane
Flex Series for North America
3 Parts and Components of Cassette Type Indoor Unit
Drainage equipment (inside type)
Discharge cindensate water from
indoor unit when cooling
Drainage hose
Guide louver
(placed in air
outlet vent)
Air outlet vent
Connecting pipe
Air filter, purifire
(in air inlet grille)
Air inlet grille
Fig.17 ISMI-C24
12
Flex Series for North America
4 Working Temperature Range
Working Temperature Range
Indoor side state ℉（℃）
Wet bulb
Dry bulb
temp. ℉（℃） temp. ℉（℃）
Outdoor side state ℉（℃）
Dry bulb
temp. ℉（℃）
Wet bulb
temp. ℉（℃）
Rated. Cooling
80.0(26.7)
67.0(19.4)
95.0(35.0)
75.0(23.9)
Max. cooling
80.0(26.7)
67.0(19.4)
115.0(46.1)
75.0(23.9)
Min. cooling
67.0(19.4)
57.0(13.9)
67.0(19.4)
57.0(13.9)
Rated. Heating
70.0(21.1)
60.0(15.6)
47.0(8.3)
43.0(6.1)
Max. heating
80.0(26.7)
—
75.0(23.9)
65.0(18.3)
Low Ambient heating
70.0(21.1)
60.0(15.6)
5.0(-15.0)
3.2(-16.0)
13
Flex Series for North America
5 Trouble Shooting
Warning!
◆ Cut down the main power switch immediately if malfunction (such as smell the burning odor
etc.) happens, and then contact service center. If the abnormal state is maintained, the unit may be
damaged or electric shock or fire may happen.
◆ Do not refit the conditioner. Please contact service center to repair or move the conditioner.
★ Check the following items before contacting maintenance center
Phenomena
Air conditioner doesn’t
run at all
Air conditioner runs but
stops immediately
Abnormal cooling or
heating
Reason
Remedial Measures
Blow of fuse or breaker
Change fuse or close breaker
Power cut
Restart when there is power supply
Don’t connect with power
Connect power well
Low batteries of wireless remote
controller
Change new batteries
Wireless remote controller exceed
remote control area
Signal could be received within 8m
Blockage in inlet or outlet vent of
indoor or outdoor unit
Clean out blockage
Blockage in inlet or outlet vent of
indoor or outdoor unit
Clean out blockage
Improper of temp. setting
Adjust settings in wireless remote
controller
Low setting of fan speed
Adjust settings in wireless remote
controller
Incorrect of wind direction
Adjust settings in wireless remote
controller
Door or window opened
Close
Direct sun burn
Hang curtain or jalousie before
windows
Too many people in room
Too many heater in room
Filter blocked by dirt
Clean filter
★ Instruction
If problem still cannot be solved after above checking, please contact service center.
14
Flex Series for North America
★ The following circumstance doesn't belong to malfunction
“Malfunction”
Air conditioner doesn’t run
Mist is blown from air
conditioner
Noise is heard from air
conditioner
Dust be blown for air
conditioner
Odor gives out from air
conditioner
Reason
Start up unit immediately after
turned off
The overload protects switch
makes it run after 3 minutes
delay.
When opening power
Run for about 1 minute without
other actions
When cooling
The high humidity air in room is
cooled rapidly
Slight click sound heard once
begin running
Sound of initialization for electric
expand valve
Hissing sound heard continuously
when cooling
The sound for gas refrigerant
flowing in the unit
Hissing sound heard when staring
or stopping
The sound for gas refrigerant
stops flow
Slight hissing sound heard when
running or after running
Sound for running of drainage
system
Creak sound heard when running
or after running
The grating sound caused by
expands of panel and other parts
for the change of temperature
Started up after long time’s doesn’t
runs
Dust in indoor unit be blown out
When running
This is because when air
conditioning, odors or cigarette
smoke from the room that was
sucked in is discharged again.
★ After-sales Service
If there is any quality or other issues after purchasing air conditioner, please contact the local
service center.
15
Flex Series for North America
6 Maintenance Method
When the unit won’t be used for a long time, please cut off the main power supply of air
conditioner.
Warning!
◆ Do turn off the unit and cut off the main power supply when cleaning the air conditioner,
otherwise electric shock or harm may happen.
◆ It is forbidden to wash air conditioner by water rinsing, otherwise electric shock may happen.
6.1 Cleaning Air Filter
When the usage environment has lots of dust, air filter should be cleaned more frequently
(about once 6 months).
(1). Open air inlet grille
Pull the 2 handles on air inlet grille at the same time with the direction showed by arrow in Fig.
18, pull it down slowly. (As per the reverse disassembly order when closing)
(2). Disassemble air filter
As shown in Fig. 19, pull the handle behind air inlet grille, raise it and disassemble. Then
remove the 3 purifiers fixed on filter.
purifier
Fig. 18
Fig. 19
(3). Clean
Use a cleaner or some water to wash filter; if the filter is too dirty ( like oil stain on it ), use some
warm water ( lower than 45℃ ) with neutral detergent to clean it, then dry it in the shade.
Note!
Do not clean the filter by hot water which temp. is higher than 45 ℃ to prevent fading or
deformation.
Do not place the filter near fire; otherwise the filter may catch fire or lead to deformation.
(4). Install air filter
Fix the 3 purifiers on filter, install filter on the several bulges on top of air inlet grille, pull the
handle behind air inlet grille toward inside to fix filter. As shown in Fig. 20.
(5). Close air inlet grille (Refer to the 1st step)
Maintenance Method
16
Flex Series for North America
Fig. 20
Fig. 21
6.2 Clean Air Inlet Grille
(1). Open air inlet grille (the same with the 1st step of Clean Air Filter)
(2). Take out air filter (the same with the 2nd step of Clean Air Filter)
(3). Take out air inlet grille
Open air inlet grille for an angle of 45°, as shown in fig. 21, raise it.
(4). Clean
Clean it by soft brush, water and neutral cleaning, then dry it after cleaning.
Note!
Do not use water above 45℃ to wash the panel to prevent fading or deformation.
(5). Install air inlet grille (refer to 3rd step)
(6). Install air filter (refer to the 4th step of Clean Air Filter)
(7). Close air inlet grille (refer to the 1st step)
6.3 Install and Change of Air Purifier
(1). Open air inlet grille (the same the 1st step of Clean Air Filter)
(2). Disassembly purifier
As shown in fig 22, disassembly air filter, screw out fixing bolts fixed on purifier on filter, then
purifier could be disassembly.
(3). Take out the package sack of static fiber net filter, then install the filter in stand of purifier,
and fix purifier on air filter.
(4). Install air filter (the same with the 4th step of Clean Air Filter)
Air filter
Purifier filter
Stand for purifier
Fix bolt of purifier
Fig.22
17
Flex Series for North America
Function and usage period for air purifying
◆ Adsorb CO, CO2, benzene, aldehydes and odor of gasoline etc..
◆ Adsorb poisonous material that is smaller than 1μm in air, as dust, pollen, bacteria, and
virus.
◆ Usage period is 6 months to 1 year. If it is necessary to be changed, purchase new purifier
in the nearest Impecca special engaged maintenance center.
6.4 Clean Outlet Vent and Surface Panel
◆ Clean the surface panel by soft dry cloth or wet cloth with neutral scourer.
◆ It is forbidden to clean surface panel by gasoline, benzene, diluents, cleansing powder etc..
◆ If the guide louver is too dirty, it may be removed to be cleaned. (As narrated below)
Disassembly and installation of guide louver
(1). Disassemble guide louver
Screw bolts in both ends of guide louver to loose.
Note!
Do not forcibly wipe guide louver when cleaning, otherwise painted surface layer would fall off.
(2). Install guide louver
Rotate guide louver slightly could install the protruding edge of both end into grooves on both
end of guide louver, and then tighten bolts.
6.5 Maintenance before or after Seasonal Use
Check before the seasonal use
◆ Check if there is blockage at inlet or outlet of air conditioner.
◆ Check if the earthing wire has been earthed reliably.
◆ Check if the air filter has been installed well.
◆ In order to start up the air conditioner smoothly after long time’s turned off, turn on the main
power supply 8 hours before turning on the air conditioner.
Maintenance after seasonal use
◆ Clean filter and body of air conditioner.
◆ Cut off the main power supply of air conditioner.
◆ The cooling or heating capacity and sound level are tested before leaving factory.
◆ If the parameter changes, refer to the data offered on nameplate.
6.6 Technical Support
Before calling technical support, please see the troubleshooting guide above. You may also visit
our website at www.impecca.com for answers to Frequently Asked Questions and to contact us.
Email: [email protected]
Phone: +1 866–954–4440
Web: www.impecca.com
18
Flex Series
Outdoor Unit
Owner's Manual
Commercial Air Conditioners
Model: ISMO-4221
Thank you for choosing our air conditioner, please read this Owner's
manual carefully before operation and retain it for future reference.
v. 1.1
Preface
Impecca Flex System adopts the cutting-edge manufacturing technology and takes global
acknowledged, environmental- friendly R410A as refrigerant, which is a green product in the 21 st
century. Please carefully read this manual before installation and operation. Instructions before reading
this manual：
(1) This unit measures on the base of UL1995.
(2) Flex System conforms to design standard: ARI 210240-2008.
(3) For guaranteeing personal safety when operating this system, please strictly follow the
instructions listed in the manual.
(4) The total capacity of the indoor units which runs at the same time can not exceed that of the
outdoor units; otherwise, the cooling (heating) effect of each indoor unit would be poor.
Minimum number of connectible indoor units
2
Maximum number of connectible indoor units
5
Minimum capacity of connectible indoor units
18KBtu
Maximum capacity of connectible indoor units
51KBtu
(5) Switch the main power on 8 hours before starting the unit, helpful for a successful startup.
(6) It is a normal phenomenon that the indoor unit fan will still run for 20~70 seconds after the
indoor unit receives the “stop” signal so as to make full use of after-heat for the next operation.
(7) When the running modes of the indoor and outdoor units conflict, it will be indicated on the
display of the wired controller in five seconds and then the indoor unit will stop. In this case, they can
back to the normal condition by harmonizing their running modes: the cooling mode is compatible with
the dehumidifying mode and the fan mode can go with any other mode. If the supply power fails when
the unit is running, then the indoor unit will send the “start” signal to the outdoor unit three minutes
later after power recovery.
(8) Cautions for the Debugging and Maintenance Personnel:
During debugging and maintenance, prior to the startup of the compressor make sure the heating
belt of the compressor has been energized for at least eight hours! Once the compressor is star ted, it
must be guaranteed that it works continuously for at least 30 minutes, otherwise it would be damaged!
User Notice
This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities or lack of experience and knowledge unless they have been given
supervision or instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
This appliance is intended to be used by expert or trained users in shops, in light industry and on
farms, or for commercial use by lay persons.
DISPOSAL: Do not dispose this product as unsorted municipal waste. Collection of
such waste separately for special treatment is necessary.
Contents
1 Safety Precautions.................................................................................................... 1
2 Product Introduction................................................................................................. 3
2.1 Name of Main Parts............................................................................................................................. 3
2.2 Combinations for outdoor and indoor units .......................................................................................... 4
2.3 Rated working condition ...................................................................................................................... 5
2.4 The range of production working temperature...................................................................................... 5
3 Preparation before Installation .................................................................................. 6
3.1 Standard parts .................................................................................................................................... 6
3.2 Selecting installation site ..................................................................................................................... 6
3.3 Piping Connection ............................................................................................................................... 7
4 Installation Instruction.............................................................................................. 8
4.1 Outline and dimension of the outdoor unit ........................................................................................... 8
4.2 Installation of the Connection Pipe ....................................................................................................... 9
4.3 Air Purging and Refrigerant Charge..................................................................................................... 11
4.4 Electric Wiring................................................................................................................................... 12
5 Troubleshooting ..................................................................................................... 14
6 The conditions listed below are not classified into errors.......................................... 15
7 Troubleshooting ..................................................................................................... 17
8 Maintenance .......................................................................................................... 18
8.1 Outdoor heat exchanger.................................................................................................................... 18
8.2 Drain Pipe ......................................................................................................................................... 18
8.3 Notice before Seasonal Use ............................................................................................................... 18
8.4 Maintenance after Seasonal Use ........................................................................................................ 18
8.5 Parts Replacement ............................................................................................................................ 18
9 After-sales Service ................................................................................................. 19
Flex series
1 Safety Precautions
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all
safety messages that follow this symbol to avoid possible injury or death.
This mark indicates procedures which, if improperly performed, might lead to the death or serious
injury of the user.
This mark indicates procedures which, if improperly performed, might possibly result in personal
harm to the user, or damage to property.
NOTICE is used to address practices not related to personal injury.
1) Instructions for installation and use of this product are provided by the manufacturer and accompany each unit.
The instruction of installation, maintenance and operating and safety instructions shall be included.
2) Installation must be performed in accordance with the requirements of NEC and CEC by authorized personnel
only.
3) Before installation, please check if the power supply is in accordance with the requirements specified on the
nameplate. And also take care of the power safety.
4) Make sure the unit can be earthed properly and soundly after plugging into the socket so as to avoid electric
shock. Please do not connect the ground wire to gas pipe, water pipe, lightning rod or telephone line.
5) Be sure to use the exclusive accessory and part to prevent the water leakage, electric shock and fire accidents.
6) If refrigerant leakage happens during installation, please ventilate immediately. Poisonous gas will emerge if the
refrigerant gas meets fire.
7) Wire size of power cord should be large enough. The damaged power cord and connection wire should be
replaced by exclusive cable.
8) After connecting the power cord, please fix the electric box cover properly in order to avoid accident.
9) Never fail to comply with the nitrogen charge requirements. Charge nitrogen when welding pipes.
10) Never short-circuit or cancel the pressure switch to prevent unit damage.
11) Please firstly connect the wired controller before energization, otherwise wired controller can not be used.
12) Before using the unit, please check if the piping and wiring are correct to avoid water leakage, refrigerant leakage,
electric shock, or fire etc.
13) Do not insert fingers or objects into air outlet/inlet grille.
14) Open the door and window and keep good ventilation in the room to avoid oxygen deficit when the gas/oil
supplied heating equipment is used.
15) Never start up or shut off the air conditioner by means of directly plug or unplug the power cord.
16) Turn off the unit after it runs at least five minutes; otherwise it will influence oil return of the compressor.
17) Do not allow children operate this unit.
18) Do not operate this unit with wet hands.
19) Turn off the unit or cut off the power supply before cleaning the unit, otherwise electric shock or injury may
happen.
20) Never spray or flush water towards unit, otherwise malfunction or electric shock may happen.
21) Do not expose the unit to the moist or corrosive circumstances.
22) Electrify the unit 8 hours before operation. Please switch on for 8 hours before operation. Do not cut off the
power when 24 hours short-time halting (to protect the compressor).
23) Volatile liquid, such as diluent or gas will damage the unit appearance. Only use soft cloth with a little neutral
detergent to clean the outer casing of unit.
24) Under cooling mode, please don't set the room temperature too low and keep the temperature difference between
indoor and outdoor unit within 41℉
25) If anything abnormal happens (such as burning smell), please power off the unit and cut off the main power
supply, and then immediately contact Impecca appointed service center. If abnormality keeps going, the unit
might be damaged and lead to electric shock or fire.
26) User is not allowed to repair the unit. Fault service may cause electric shock or fire accidents. Please contact Impecca
appointed service center for help.
1
Flex Series
Impecca is not responsible of personal injury or equipment damage caused by improper
insta llation and commission, unnecessary service and incapable of following the rules and instructions
listed in this manual.
Flex Series
2 Product Introduction
Impecca Flex Series adopts inverter compressor technology. According to change displacement of
compressor, stepless capacity regulation within range of 15%~120% can be realized. Various product lineup
is provided with capacity range from 30KBtu to 42KBtu, which can be widely used in boarding house and working
area and especially applicable to the place with variable load change. Impecca commercial air conditioner is
absolutely your best choice.
2.1 Name of Main Parts
① ②
③
⑤
④
NO.
Name
①
Motor
②
Fan
③
Electric Box
④
Gas valve assembly
Fig1
2
⑤
Liquid valve assembly
Flex Series
2.2 Combinations for outdoor and indoor units
Wall Mounted
Indoor Unit
Wall Mounted
Indoor Unit
Cassettle Type
Indoor Unit
Floor/ Ceiling
Indoor Unit
Fig 2
See Fig.2 for Combinations for Outdoor and Indoor Units. For the Flex Series air conditioning syst em, one
outdoor unit is able to drive up to five indoor units which can be cassette type, duct type, wall-mounted or
floor ceiling type. The outdoor unit will run as long as any one indoor unit receives the running command, and all
indoor units stop once the outdoor unit is turned off.
Table 1 Energy Level and Capacity Code of the Indoor
Capacity Code
Indoor unit
Model
Outdoor unit
09
ISMI-W092
12
ISMI-W122
Wall Unit
18
ISMI-W182
24
ISMI-W242
ISMO-4221
18
ISMI-FC18
Floor/Ceiling Type
ISMI-FC24
24
ISMI-C15
15
Cassettle type
24
ISMI-C24
2.3 Rated working condition
Table 2
Rating cooling
Rating Heating
Indoor side state
Dry buib temp.℉
Wet buib temp.℉
80.06
66.92
69.98
60.08
NOTICE
Outdoor side state
Dry buib temp.℉
Wet buib temp.℉
95
75.02
43.00
47
1) The following listed cooling /heating capacity and noise is tested before outgoing.
2) The parameters below are tested under rated working condition. If there is any change to them, please refer to the
nameplate.
3) The parameters of heating capacity of indoor unit for heat pump excluded that of auxiliary electric heating power.
4) The performance parameters below are tested according to standard ANSI/AHRI 1230-2010.
3
Flex Series
2.4 The range of production working temperature
Table 3
Cooling Working range
Heating Working range
Outdoor temperature 0~118℉
Outdoor temperature -4~86℉
3 Preparation before Installation
3.1 Standard parts
(Please use only Impecca supplied parts)
Number
Table 4
Parts of Outdoor Unit
picture
name
1
Owner's
manual
2
Tube connector
subassy
Quantity
Remark
1
8
3.2 Selecting installation site
1) Install the unit at a place where is adequate to withstand the weight of the unit and make sure the unit would not
shake or fall off.
2) Never expose the unit under direct sunshine and rainfall. Install the unit at a place where is against dust,
typhoon and earthquake.
3) Try to keep the unit away from combustible, inflammable and corrosive gas or exhaust gas.
4) Leave some space for heat exchanging and servicing so as to guarantee unit normal operation.
5) Keep the indoor and outdoor units close to each other as much units close to each other as much the
pipe length and bends.
6) Never allow children to approach to the unit and take measures to prevent children touching the unit.
When the outdoor unit is totally surrounded by walls, the installation space of the unit should be as required in
Fig.3.
19 2/3
19 2/3
19 2/3
39 3/8
78 3/4
19 2/3
78 3/4
unit:inch
Fig 3
4
Flex Series
3.3 Piping Connection
The maximum pipe length is shown in the following table. When the distance between units (piping length) is
out of the range listed below, normal run of the unit can not be guaranteed.
Table 5
Connecting Pipe (inch)
Max. Height Difference between Indoor
Max. Pipe length(ft)
Model
Unit and Outdoor Unit (ft)
Liquid
Gas
When the outdoor unit is above,
maximum height difference between
ISMO-4221
Ф1/4
Ф3/8
246.1
indoor and outdoor units is up to 49.2ft;
When the indoor unit is above,
maximum height difference between
indoor and outdoor units is up to 49.2ft;
NOTICE
1) Use water-proof insulating pipe.
2) Wall thickness of pipe: 0.019-0.039 inch; bearing pressure: 3.0MPa
3) The longer the connection pipe is, the more cooling and heating capacity will decrease.
4 Installation Instruction
4.1 Outline and dimension of the outdoor unit
Unit:inch
Fig 4
Outline dimension and Mounting holes
14 1/4
42 1/2
17 1/3
43 3/7
40
15 3/4
24 5/6
Unit:inch
5
Flex Series
4.2 Installation of the Connection Pipe
Connecting piping for indoor unit and outdoor unit are in manifold mode. (As shown below).
Fig. 5
4.2.1 Piping between the Indoor and Outdoor Units
(1) If the liquid and gas stop valves which have the sign of A , B, C, D or E have not been connected to
the indoor units, please turn off the screw cap with the spanner airproof.
(2) Refer to Fig.6 for the moments of torque for tightening screws.
(3) Let the flare end of the copper pipe point at the screw and then tighten the screw by hand.
(4) After that, tighten the screw by the torque wrench unit it clatters (as shown in Fig.6).
(5) The bending degree of the pipe can not be too small; otherwise it will crack. And please use a pipe tube
bender to bend the pipe.
(6) Wrap the exposed refrigerant pipe and the joints by sponge and then tighten them with the plastic tape.
P ip e
F la re N u t
Pipe
diameter
Φ1/4 inch
Φ3/8 inch
Φ1/2 inch
Φ5/8 inch
Thickness of
copper tube
≥0.0315 inch
≥0.0315 inch
≥0.0315 inch
≥0.0394 inch
Tightening
torque
11～22 ft·lbf
26～29 ft·lbf
33～37 ft·lbf
44～48 ft·lbf
Spanner
Fig6
1) During the connection of the indoor unit and the refrigerant pipe, never pull any joints of the indoor unit by force;
otherwise the capillary pipe or other pipe may crack, which then would result in leakage.
2) The refrigerant pipe should be supported by brackets, that is, don’t let the unit withstand the weight of it.
3) If the piping connection size of outdoor unit does not match the piping connection size of indoor unit, use the
piping connection dimension of indoor unit. And use different-diameter joints which is installing on the place of
the piping connection to connect the indoor unit.
4) For the Flex Series, each pipe should be labeled to tell which system it belongs to avoid mistaken
inaccurate piping.
4.2.2 Allowable pipe length and drop height among indoor and outdoor units
If the total refrigerant pipe length (liquid pipe) is smaller than that listed in the table below, no additional
refrigerant will be charged.
Table 6
131.2 ft
Total Liquid Pipe Lenght (a+b+c+d+e)
6
Flex Series
Allowable Length and Height Fall of the Refrigerant Pipe
Table 7
Allowable Value
Fitting Pipe
Total length (actual length) of fitting
pipe
246.1ft
Length of farthest fitting pipe (ft)
82ft
LX（X=1，2，3，4,5）
49.2ft
H1
49.2ft
H3
24.6ft
H2
Outdoor unit at
upper
Outdoor unit at
lower
Height difference between indoor
units (m)
Outdoor unit
Indoor unit
Equivalent length of the farthest fitting pipe Lx
L1
L2
a
b
Height difference between
indoor units H2
Height difference between indoor unit and outdoor unit H1
Height difference
between outdoor
unit and indoor unit
L1 +L2 +…+L M(M ≤5)
Indoor unit
L3
L4
L5
c
d
e
Fig 7
4.2.3 Installation of the Protection Layer of the Refrigerant Pipe
(1)The refrigerant pipe should be insulated by the insulating material and plastic tape in order to prevent
condensation and water leakage.
(2)The joints of the indoor unit should be wrapped with the insulating material and no gap is allowed on the
joint of the indoor unit, as shown in Fig.8.
Thermal insulating layer is required to be wrapped at this part.
Thermal insulating pipe
No gap
Fig 8
7
Flex Series
After the pipe is protected well enough, never bend it to form a small angle; otherwise it would crack or
break.
(3)Wrap the Pipe with Tape：
a. Bundle the refrigerant pipe and electric wire together with tape, and separate them from the drain pipe to
prevent the condensate water overflowing.
b. Wrap the pipe from the bottom of the outdoor unit to the top of the pipe where it enters the wall. During the
wrapping, the later circle should cover half of the former one.
c. Fix the wrapped pipe on the wall with clamps.
1) Do not wrap the pipe too tightly; otherwise the insulation effect would be weakened. Additionally, make sure the
drain hose is separated from the pipe.
2) After that, fill the hole on the wall with sealing material to prevent wind and rain coming into the room.
4.2.4 Support and protection for pipeline
Support should be made for hanging connection pipe. Distance between each support can not be over 1m.
4.3 Air Purging and Refrigerant Charge
4.3.1 Air purging
(1) The refrigerant has been charged into the outdoor unit before shipment, while additional refrigerant still need
be charged into the refrigerant pipe during the field installation.
(2) Check if the liquid valve and the gas valve of the outdoor unit are closed fully.
(3) As shown in the following figure (Fig.9), expel the gas ins ide the indoor unit and refrigerant pipe out by the
vacuum pump.
Manometer
Manometer
"HI"Knob
"LO"Knob
liquid valve
Vacuuming pump
Connection hose
Gas valve
Fig 9
(4) When the compressor is not running, charge the R410A refrigerant into the refrigerant pipe from the liquid
valve of the outdoor unit (do not do it from the gas valve).
4.3.2 Additional refrigerant charging
(1) Refrigerant Charge in the Outdoor Unit before Shipment
NOTICE
1) Outdoor unit has been charged refrigerant before delivery. The refrigerant charge is not included those charged
additionally in the indoor unit and the refrigerant pipe.
2) The amount of the additional refrigerant charge is dependent on the diameter and length of the liquid refrigerant
pipe which is decided by the actual yield installation requirement.
3) Record the additional refrigerant charge for future maintenance.
8
Flex Series
(2) Calculation of the Additional Refrigerant Charge
Additional Refrigerant Charge=
(ΣLength of Liquid Pipeφ0.375×54+ΣLength of Liquid Pipeφ0.25×22)-880
The biggest additional refrigerant charge value is 800g. It means that if the calculated value exceed 800g, the
additional refrigerant charge takes 800g, while the calculated value less than 800g, the additional refrigerant charge
takes the calculated value.
4.4 Electric Wiring
4.4.1 Wiring precautions
(1) The installation must be done in accordance with the national wiring regulations.
(2) Only the power cord with the rated voltage and exclusive circuit for the air conditioning can be used.
(3) Do not pull the power cord by force.
(4) The electric installation should be carried out by the technician as instructed by the local laws, regulations
and also this manual.
(5) The diameter of the power cord should be large enough and once it is damaged it must be replaced by the
dedicated one.
(6) The earthing should be reliable and the earth wire should be connected to the dedicated device of the building
by the technician. Bes ides, the air switch coupled with the leakage current protection switch must be equipped, which
is of enough capacity and of both magnetic and thermal tripping functions in case of the short circuit and overload.
Table 8
Power Supply
Capacity of the air Switch（A）
Recommended Cord（pieces×
sectional area）
208/230V~60Hz
32
3×0.0062 sq in
OUTDOOR UNIT
XT
L1 L2
N(1) 2
3
PE
L1 L2
POWER
N(1) 2
N(1) 2
3
N(1) 2
3
INDOOR UNIT A
N(1) 2
3
N(1) 2
INDOOR UNIT B
N(1) 2
3
PE
PE
XT5
XT4
XT3
XT2
XT1
3
INDOOR UNIT C
N(1) 2
3
PE
PE
3
N(1) 2
3
INDOOR UNIT D
N(1) 2
PE
3
INDOOR UNIT E
Fig 11
4.4.2 Earthing Requirements
(1) The air conditioner is classified into the Class I appliances, so its earthing must be reliable.
(2) The yellow-green line of the air conditioner is the earth line and can not be used for other purpose, cut off or
fixed by the tapping screw; otherwise it would cause the hazard of electric shock.
(3) The reliable earth terminal should be provided and the earth wire can not be connected to any of the following
places.
①Running water pipe;； ②Coal gas pipe; ③Sewage pipe; ④Other places where the professional personnel
think unreliable.
9
Flex Series
4.4.3 Electrical Cable Connection
1) The mistake connecting line will result in malfunction. After the electrical wiring working, ensure the wire
between the connection place and the fixed place has a certain freedom degree.
2) The connection piping and connection line of each indoor unit should connect well according to the instruction.
3) The electric installation should be carried out by the technician as instructed by the local laws, regulations and
also this manual.
4) The installation location should be dry, and can't be expose in direct sunlight or strong breeze.
5) Have to install a breaker in the circuit that can shut off the main power supply of the system. Besides, the air
switch coupled with the leakage current protection switch must be equipped.
4.4.4 Wiring of the Power Cord
(1). Open the side plate.
(2). Connect the power cord to the terminals “L1”, “L2” and also the earthing screw, and then connect the wiring
terminals “N(1),2,3” of the indoor unit to those of the outdoor unit correspondingly. Please use the green bonding
screw to connect the earthing cord. The location is showing in the figure 12.
(3). Fix the power cord with wire clips.
(4). Let the power cord go through the rubber ring.
If the supply cord is damaged, it must be replaced by the manufacturer
or its service agent or a similarly qualified person in order to avoid a hazard.
Tighten the green
bonding screw here
Figure 12
10
Flex Series
5 Troubleshooting
1) In the event of abnormal conditions (like, stinky smell), please shut off the main power supply immediately and
then contact the Impecca appointed service center; otherwise the continuous abnormal running would damage
the air conditioning unit and also would cause electric shock or fire hazard etc.
2) Do not repair the air conditioning personally but instead contact the professionally skilled personnel at the Impecca
appointed service center, as the incorrect repair would cause electric shock or fire hazard etc.
Check before Contacting Service Center.
Check Items
Has the unit been fixed firmly?
Have you done the gas leakage test?
Is the unit get proper thermal insulation?
Does the unit drain well?
Is the voltage in accordance with the
rated voltage specified on the nameplate?
Is the electric wiring and piping
connection installed correctly and
securely?
Has the unit been earthed securely?
Is the power cord specified?
Has the inlet and outlet been blocked?
NOTICE!
Table 9
Conditions Might Happen
The unit may drop, shake or emit noise.
It may cause insufficient cooling/heating
capacity.
It may cause condensation and dripping.
It may cause condensation and dripping.
It may cause malfunction or damage the part.
Check
It may cause malfunction or damage the part.
It may cause electrical leakage.
It may cause malfunction or damage the part.
It may cause insufficient cooling/heating
capacity.
If the air conditioner still runs abnormally after the above check and handling, please contact the
maintenance serviceman at the local appointed service center and also give a description of the error occurred
as well as the model of the unit.
11
Flex Series
6 The conditions listed below are not classified into errors.
The unit does not run
The unit blows out mist
The unit generates noise
The unit blows out dust.
The unit emits odors.
Table 10
Conditions
When restart the unit soon after it is
stopped.
Causes
The overload protection switch of the unit let the
startup delayed for three minutes.
The unit will stand by for approximate one
As soon as power is on.
minute.
When the cooling operation starts.
The hi-humidity air indoor is cooled quickly.
The unit “clatters” as soon as it It is the sound generated during the initialization
of the electronic expansion valve.
starts running.
The unit “swishes ” during the It is the sound when the refrigerant gas runs inside
the unit.
cooling operation.
The unit “swishes ” when it is It is the sound when the refrigerant gas stops
running.
started or stopped.
The unit “swishes” when it is in It is the sound when the draining system is
operating.
and after the running.
It is the sound of frication generated by the skin
The unit “squeaks” when it is in
plate etc which swells due to the temperature
and after the running.
change.
When the unit restarts after it is not
The dust inside the unit is blown out again.
used for a long time.
When the unit is running.
The odors absorbed in are blown out again.
NOTICE!
If problem can not be solved after checking the above items, please contact Impecca service center and
show phenomena and models.
Following circumstance are not malfunction
Table 11
Malfunction
Reason
Unit doesn’t run
When unit is started
Overload protection switch makes it run after 3 minutes
immediately after it is just
delay
turned off
When power is turned on
Standby operating for about 1 minute
Mist comes from the
Under cooling
Indoor high humidity air is cooled rapidly
unit
Noise is emitted
Slight cracking sound is heard
It is noise when electronic expansion valve initialization
when just turned on
That's sound for gas refrigerant flowing in unit
The unit blows out
duct
The unit emits odor
There is consecutive sound
when cooling
There is sound when unit starts
or stops
There is slight and consecutive
sound when unit is running or
after running
Cracking sound is heard when
unit is operating and after
operating
When unit runs after no
operation for a long period
Operating
Indoor unit still runs
after switch off
After every indoor unit receive
"stop" signal, fan will keep
Indoor fan motor will keep running 20-70s so as to take
good use of excess cooling and heating and prepare for
That's sound for gas refrigerant stops to flow
That's sound for operation of drainage system
That’s sound caused by expansion of panel and other
parts due to temperature change
Dust in indoor unit is blew out
The room odor absorbed by the unit is blew out again
12
Flex Series
Mode conflict
running
next operation
COOL or HEAT mode can not
be operated
When the indoor operating mode conflicts with that of
outdoor unit, indoor fault indicator will flash and conflict
will be shown on the wired controller after 5 minutes.
Indoor unit stops to run and meanwhile change outdoor
operating mode as the same as that of indoor unit, then
the unit will go back to normal. COOL mode doesn't
conflict with DRY mode. FAN mode doesn't conflict with
any mode.
13
Flex Series
7 Troubleshooting
The error code will be displayed on the wired controller and the main board of the outdoor unit
The meaning of each error, as shown in table 13.
Table 12
The indicator display
Name of malfunction
Yellow light
Red light
Green light
Compressor runs
Flash once
Defrost
Flash twice
Anti-freezing protection
Flash 3 times
IPM protection
Flash 4 times
AC over-current protection
Flash 5 times
Over-burden protection
Flash 6 times
Compressor exhaust high temperature protection
Flash 7 times
Compressor overload protection
Flash 8 times
Power protection
Flash 9 times
EEPROM reads and write protection
Flash 11 times
Low PN voltage protection
Flash 12 times
Over voltage protection for PN
Flash 13 times
PFC protection
Flash 14 times
PFC module temperature protection
Flash 15 times
Low pressure protection
Flash 17 times
High pressure protection
Flash 18 times
Limit/decline frequency(electric current)
Flash 1 times
Frequency limit（exhaust）
Flash 2 times
Frequency limit（Over-burden）
Flash 3 times
Outdoor ambient sensor malfunction
Flash 6 times
Outdoor tube sensor malfunction
Flash 5 times
Exhaust sensor malfunction
Flash 7 times
Attain the temperature of switch on
Flash 8 times
Frequency limit(power)
Flash 13 times
Outdoor fan malfunction
Flash 14 times
Frequency limit(PFC module temperature)
Flash 15 times
PFC module sensor malfunction
Flash 16 times
Liquid pipe temperature sensor malfunction of A
Flash 17 times
Gas pipe temperature sensor malfunction of A
Flash 18 times
Liquid pipe temperature sensor malfunction of B
Flash 19 times
Gas pipe temperature sensor malfunction of B
Flash 20 times
Liquid pipe temperature sensor malfunction of C
Flash 21 times
Gas pipe temperature sensor malfunction of C
Flash 22 times
Liquid pipe temperature sensor malfunction of D
Flash 23 times
Gas pipe temperature sensor malfunction of D
Flash 24 times
Liquid pipe temperature sensor malfunction of E
Flash 25 times
Gas pipe temperature sensor malfunction of E
Flash 26 times
Exit of the condenser tube sensor malfunction
Flash 27 times
Flash n times（n=indoor
Correspondence is normal
unit number）
Often bright
Communication failure between indoor unit and
（indoor unit all
outdoor unit
Communication failure）
14
Flex Series
8 Maintenance
Regular check, Maintenance and care should be performed by professional personnel, which will prolong the
unit life span.
8.1 Outdoor heat exchanger
Outdoor heat exchanger is required to be cleaned once every two months. Use vacuum cleaner with nylon brush
to clean up dust and sundries on the surface of heat exchanger. Blow away dust by compressed air if it is available. Never
use water to wash the heat exchanger.
8.2 Drain Pipe
Regularly check if the drain pipe is clogged in order to drain condensate smoothly.
8.3 Notice before Seasonal Use
(1) Check if the inlet/outlet of the indoor/outdoor unit is clogged.
(2) Check if the ground wire is earthed reliably.
(3) Check if battery of remote wireless controller has been replaced.
(4) Check if the filter screen has been set soundly.
(5) After long period of shutdown, open the main power switch 8 hours before re-operating the unit so as to
preheat the compressor crankcase.
(6) Check if the outdoor unit is installed firmly. If there is something abnormal, please contact the
Impecca appointed service center.
8.4 Maintenance after Seasonal Use
(1) Cut off main power supply of the unit.
(2) Clean filter screen and indoor and outdoor units.
(3) Clean the dust and sundries on the indoor and outdoor units.
(4) In the event of rusting, use the anti-rust paint to stop spreading of rust.
8.5 Parts Replacement
Purchase parts from Impecca appointed service center or dealer if necessary.
NOTICE!
During airtight and leakage test, never mix oxygen, ethyne and other dangerous gas into refrigeration
circuit. In case of hazard, it's better to use nitrogen or refrigerant to accomplish such test.
15
9 CUSTOMER SUPPORT
Before contacting customer support, please see the troubleshooting guide above.
Visit our website to contact us, find answers to Frequently Asked Questions, and for other resources which may include an
updated version of this user's guide.
 WWW.IMPECCA.COM
If you wish to contact us by phone, please be sure to have your model number and serial number ready and call us between
9:00am and 6:00pm ET, at +1 866-954-4440.
Keep tabs on Impecca's newest innovations & enter contests via our social network feeds:
www.facebook.com/Impecca/
 www.instagram.com/impecca/
Wired Controller
IS-TT850
User's Manual
Thank you for choosing Impecca Air Conditioners. Please read this
owner’s manual carefully before operation and retain it for future reference.
User Notice
Please carefully read this manual before installation and use of this product
ƹ
(QVXUHthere is separate SRZHUVXSSO\IRUHDFKLQGRRUXQLW
ƹ
Never install wired controller in a wet place or under direct sunlight.
ƹ
Shielded twisted pair line must be substituted as signal line for wired controller if the unit is
installed in the place where there is electromagnetic interference.
ƹ
ƹ
ƹ
Make sure communication line is connected into correct port to avoid communication
malfunction.
Never knock, throw or frequently disassemble the wired controller.
Never operate the wired controller with wet hand.
Contents
1 Display Section................................................................................................ 1
1.1 Controller's LCD ........................................................................................ 1
1.2 Instruction to LCD ....................................................................................... 2
2 Buttons ............................................................................................................ 3
2.1 Layout of Buttons ....................................................................................... 3
2.2 Functions of Buttons ................................................................................... 3
3 Operation Instructions ..................................................................................... 4
3.1 On/Off ......................................................................................................... 4
3.2 Mode Setting .............................................................................................. 4
3.3 Temperature Setting ................................................................................... 4
3.4 Fan Setting ................................................................................................. 5
3.5 Timer Setting .............................................................................................. 5
3.6 Swing Setting ............................................................................................. 7
3.7 Sleep Setting .............................................................................................. 8
3.8 Turbo Setting .............................................................................................. 9
3.9 E-heater Setting ....................................................................................... 10
3.10 Blow Setting ........................................................................................... 11
3.11 Other Functions ...................................................................................... 12
4 Installation and Dismantlement ..................................................................... 12
4.1 Connection of the Signal Line of the Wired Controller ............................. 12
4.2 Installation of the Wired Controller ........................................................... 12
4.3 Dismantlement of the Wired Controller .................................................... 14
5 Errors Display ................................................................................................ 14
Wired Controller IS-TT850
1 Display Section
Fig1.1.1 Diagram of wired controller
1.1 LCD Display of Wired Controller
Fig.1.1.2 LCD display
1
Wired Controller IS-TT850
1.2 Instruction to LCD Display
Table 1.1
No.
Symbols
Description
1
Swing function
2
Air exchange function (this function is yet unavailable for this unit).
3
Sleep function (Only sleep 1).
4
Each kind of running mode of indoor unit (auto mode)
5
Cooling mode
6
Dry mode
7
Fan mode
8
Heating mode
9
Defrosting function for the outdoor unit.
10
Gate-control function (this function is yet unavailable for this unit).
11
Lock function.
12
SHIELD
13
Turbo
14
MEMORY
15
16
Turbo function state
Memory function (The indoor unit resumes the original setting state after
power failure and then power recovery).
It blinks under on state of the unit without operation of any button.
SAVE
17
Energy-saving function (this function is yet unavailable for this unit).
Ambient/setting temperature value
18
E-HEATER
19
BLOW
20
21
Shield functions (Button operation, temperature setting, On/Off operation,
Mode setting are disabled by the remote monitoring system.)
Electric auxiliary heating function.
Blow function.
Timing value.
QUIET
Quiet function (two types: quiet and auto quiet)
(this function is yet unavailable for this unit).
2
Wired Controller IS-TT850
2 Buttons
2.1 Layout of Buttons
2.2 Functions of Buttons
Table 2.1
No.
Name
1
Enter/Cancel
2
Ÿ
6
ź
3
Fan
4
Mode
5
Function
7
Timer
Timer setting.
8
On/Off
Turn on/off the indoor unit.
4+2
Mode + Ÿ
3+6
)DQź
4+6
2+6
Mode ź
Ÿź
Function
Function selection and cancellation.
ķ Running temperature setting of the indoor unit, range:61°F-86°
F(16°C-30°C). ĸ Timer setting, range:0.5(30 minutes) - 24 (hours).
Setting of the low/middle/high/auto fan speed.
Setting of the Cooling/Heating/Fan/Dry/Auto mode of the indoor unit.
Switchover among the functions of Turbo/Save/E-heater/Blow etc..
With the A/C powered off, press these two buttons together for 5
seconds to toggle the Memory function. With Memory on, the unit will
return the the previous setting after resuming from a power failure.
With Memory toggled off, it will stay off
With the A/C powered off, press these two buttons together for 5 seconds
to determine if your unit is capable of just cooling
or both cooling and
heating,
indicated by the symbols shown.
With the A/C powered off, press these two buttons together for 5 seconds to
toggle between Fahrenheit and Celsius.
Press these two buttons together for 5 seconds to toggle the lock function.
3
Wired Controller IS-TT850
3 Operation Instructions
3.1 On/Off
Press On/Off button to toggle your A/C's power.
Note: The state shown in Fig.3.1.1 indicates the “Off” state of the unit after power has been restored
to the unit. The screen shown in Fig.3.1.2 indicates the “On” state of the unit after power on.
Fig.3.1.1 “Off” State
Fig.3.1.2 “On” State
3.2 Mode Setting
Under ON state of the unit, press the Mode to switch the operation modes as the
following sequence: Auto–Cooling–Dry–Fan–Heating.
3.3 Temperature Setting
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continuously, the temperature will be increased or decreased by 1° every half a second,as
shown in Fig.3.3.1.
In the Cooling, Dry, Fan or Heating mode, the temperature setting range is 61°F-86°
F(16°C-30°C). In the Auto mode, the setting temperature not manually adjustable.
Fig.3.3.1
Fig.3.4.1
4
Wired Controller IS-TT850
3.4 Fan Setting
While the unit is powered on, press Fan and then fan speed of the indoor unit will change
circularly as shown in Fig.3.4.1.
Low
Middle
High
(Fig. 3.4.1)
3.5 Timer Settings
While the unit is powered on, pressing the Timer button allows you to set the delay until the
unit turns off. While the unit is powered off, pressing the Timer button allows you to set the dealy
until the unit turns on.
• 7LPHURQVHWWLQJ details
With the unit turned off, and no timer already programmed, press the Timer button. The
display will show "0.5" with "Hour on" blinking. PressŸorźbutton to adjust delay until unit
turns on and press Timer or Enter/Cancel to confirm.
• Timer off setting details:
With the unit turned on, and no timer already programmed, press the Timer button. The display
will show "0.5" with "Hour off" blinking.
• Timer off setting details:
With the unit turned on, and no timer already programmed, press the Timer button. The display will
show "0.5" with "Hour off" blinkingSUHVVŸRUźEXWWRQWRDGMXVWdelay until unit turns on and press
Timer or Enter/Cancel to confirm.
‡&DQFHOWLPHU
After setting of timer, if Timer button is pressed, LCD won’t display xx. Hour so that timer setting is
Timer off setting under the “On” state of the unit is shown as Fig.3.5.1.
canceled.
Fig.3.5.1 Timer off Setting under the “On” State of the Unit
5
Wired Controller IS-TT850
Timer on setting under the “Off” state of the unit is shown as Fig.3.5.2.
Fig.3.5.2 Timer on Setting under the “Off” State of the Unit
7LPHUUDQJHKU(YHU\SUHVVRIŸRUźZLOOPDNHWKHVHWWLPHLQFUHDVHGRUGHFUHDVHGE\
0.5hr. If either of them is pressed continuously, the set time will increase/ decrease by 0.5hr every
0.5s.
6
Wired Controller IS-TT850
3.6 Swing Setting
Swing On: Press Function under on state of the unit to activate the swing function. In this case,
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Swing Off: When the Swing function is on, press Function to enter the Swing setting
interface,with
blinking. After that, press Enter/Cancel to cancel this function. Swing setting is
shown as Fig.3.6.1.
Fig.3.6.1 Swing Setting
Notes:
ķ Sleep, Turbo or Blow setting is the same as the Swing setting.
ĸ After the setting has been done, it has to press the key “Enter/Cancel” to back to the setting
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7
Wired Controller IS-TT850
3.7 Sleep Setting
Sleep on: Press Function under the On state of the unit till the unit enters the Sleep setting
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Sleep off: When the Sleep function is activated, press Function to enter the Sleep setting
status. After that, press Enter/Cancel to cancel this function.
In the Cooling or Dry mode, the temperature will increase by 1°C after the unit runs under
Sleep1 for 1hr and 1°C after another 1hr.After that, the unit will run at this temperature.
In the Heating mode, the temperature will decrease by 1°C after the unit runs under Sleep 1 for
1hr and 1°C after another 1hr. After that, the unit will run at this temperature.
Sleep setting is shown as Fig.3.7.1.
Fig.3.7.1. Sleep Setting
8
Wired Controller IS-TT850
3.8 Turbo Setting
Turbo function: The unit at the high fan speed can realize quick cooling or heating so that the
room temperature can quickly approach the setting value.
In the Cooling or Heating mode, press Function till the unit enters the Turbo setting status and
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When the Turbo function is activated, press Function to enter the Turbo setting status and then
press Enter/Cancel to cancel this function.
Turbo function setting is as shown in Fig.3.8.1.
Fig.3.8.1 Turbo Setting
9
Wired Controller IS-TT850
3.9 E-heater Setting
E-heater (auxiliary electric heating function): In the Heating mode, E-heater is allowed to be
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Once the wired controller or the remote controller enters the Heating mode, this function will be
turned on automatically.
Press Function in the Heating mode to enter the E-heater setting interface and then press
Enter/Cancel to cancel this function.
Press Function to enter the E-heater setting status, if the E-heater function is not activated,
and then press Enter/Cancel to activate it.
The setting of this function is shown as Fig.3.9.1 below:
Fig.3.9.1 E-heater Setting
10
Wired Controller IS-TT850
3.10 Blow Setting
Blow function: After the unit is turned off, the water in evaporator of indoor unit will be
automatically evaporated to avoid mildew.
In the Cooling or Dry mode, press Function till the unit enters the Blow setting status and then
press Enter/Cancel to active this function.
When the Blow function is activated, press Function to the Blow setting status and then press
Enter/Cancel to cancel this function.
Blow function setting is as shown in Fig.3.10.1
Fig.3.10.1 Blow Setting
Notes:
ķ When the Blow function is activated, if turning off the unit by pressing On/Off or by the
remote controller, the indoor fan will run at the low fan speed for 2 min, with “BLOW” displayed on
the LCD. While, if the Blow function is deactivated, the indoor fan will be turned off directly.
ĸ Blow function is unavailable in the Fan or Heating mode.
11
Wired Controller IS-TT850
3.11 Other Functions
a. Lock
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the same time for 5s till the wired controller enters the Lock function. In this case, LCD displays
.
After that, repress these two buttons at the same time for 5s to quit this function.
Under the Lock state, any other button press won’t get any response.
b. Memory
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5s to switch memory states between memory on and memory off. When this function is activated,
Memory will be displayed. If this function is not set, the unit will be under the “Off” state after power
failure and then power recovery.
Memory recovery: If this function has been set for the wired controller, the wired controller after
power failure will resume its original running state upon power recovery. Memory contents: On/
Off,Mode, set temperature, set fan speed and Lock function.
4 Installation and Dismantlement
4.1 Connection of the Signal Line of the Wired Controller
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Ɣ/HWWKHVLQJOHOLQHRIWKHZLUHGFRQWUROOHUWKURXJKWKHUXEEHUULQJ
Ɣ&RQQHFWWKHVLJQDOOLQHRIWKHZLUHGFRQWUROWRWKHSLQVRFNHWRIWKHLQGRRUXQLW3&%
Ɣ7LJKWHQWKHVLJQDOZLUHZLWKWLHV
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20 meters ( the standard distance is 8 meters)
4.2 Installation of the Wired Controller
PVC Pipe
1
2
3
4
5
Fig.4.1 Accessories for the Installation of the Wired Controller
Table 4.1
No.
1
2
3
4
5
Name
Socket box
embedded
in the wall*
Back-plate of
the Wired
Controller
Screw
M4X25*
Front Panel
of the Wired
Controller
Screw
ST 2.9X6*
*Not included
12
Wired Controller IS-TT850
3
2
1
6
7
8
9
4
5
10
Fig.4.2
Fig.4.2 shows the installation steps of the wired controller, but there are some issues that need
your attention.
1) Prior to the installation, please firstly cut off the power supply of the wire buried in the
installation hole, that is, no operation is allowed with electricity during the whole installation.
2) Pull out the four-core twisted pair line from the installation holes and then let it go through
the rectangular hole behind the back-plate of the wired controller.
6WLFNWKHVROHSODWHRIWKHZLUHGFRQWUROOHUWRWKHZDOORYHUWKHLQVWDOODWLRQKROHDQGWKHQ¿[LW
with screws M4X25.
4) Insert the four-core twisted pair line into the slot of the wired controller and then buckle the
front panel and the back-plate of the wired controller together.
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CAUTION!
Please pay special attention to the followings during the connection to avoid the malfunction of
the air conditioning unit due to electromagnetic interference.
ķ Separate the signal and communication lines of the wired controller from the power cord
13
Wired Controller IS-TT850
and connection lines between the indoor and outdoor unit, with a minimum interval of 20cm,
otherwise the communication of the unit will probably work abnormally.
ĸ I f the air conditioning unit is installed where is vulnerable to electromagnetic
interference,then the signal and communication lines of the wired controller must be the shielding
twisted pair lines.
4.3 Dismantlement of the Wired Controller
1
2
3
4
5 Errors Display
If there is an error occurring during the operation of the system, the error code will be displayed
on the LCD, as show in Fig.5.1. If multi errors occur at the same time, their codes will be displayed
circularly.
Note: In event of any error, please turn off the unit and contact the professionally skilled
personnel.
Fig.5.1
14
Wired Controller IS-TT850
Table 5.1 Meaning of Each Error
Error
Return air temperature sensor open/
short circuited
evaporator temperature sensor open/
short circuited
Indoor unit liquid valve temperature
sensor open/short circuited
Indoor gas valve temperature sensor
open/ short circuited
IPM temperature sensor open/short
circuited
Outdoor ambient temperature sensor
open/ short circuited
Outdoor unit condenser mid-tube
temperature sensor open/short circuited
Discharge temperature sensor open/
short circuited
Error
Code
Error
Error
Code
F1
Drive board communication error
P6
F2
Compressor overheating protection
H3
b5
Indoor and outdoor units unmatched
LP
b7
Communication line misconnected or
expansion valve error
dn
P7
5XQQLQJPRGHFRQÀLFW
E7
F3
Pump-down
Fo
F4
Jumper error
C5
F5
Forced defrosting
H1
Indoor and outdoor communication error
E6
Compressor startup failure
Lc
DC bus under-voltage protection
PL
High discharge temperature protection
E4
DC bus over-voltage protection
PH
Overload protection
E8
Compressor phase current sensing
circuit error
U1
Whole unit over-current protection
E5
Compressor demagnetization protection
HE
Over phase current protection
P5
PFC protection
Hc
Compressor desynchronizing
H7
IPM Temperature Protection
P8
IPM Current protection
H5
Compressor phase loss/reversal
protection
Frequency restricted/reduced with whole
unit current protection
Frequency restricted/reduced with IPM
current protection
Frequency restricted/reduced with high
discharge temperature
Frequency restricted/reduced with antifreezing protection
Frequency restricted/reduced with
overload protection
Frequency restricted/reduced with IPM
temperature protection
Over-power protection
L9
System charge shortage or blockage
protection
F0
Capacitor charging error
PU
High pressure protection
E1
Low pressure protection
E3
Compressor stalling
LE
Over-speeding
LF
Drive board temperature sensor error
PF
Indoor unit full water error
E9
AC contactor protection
P9
Anti-freezing protection
E2
Temperature drift protection
PE
AC input voltage abnormal
PP
Sensor connection protection
Pd
Whole unit current sensing circuit error
U5
DC bus voltage drop error
U3
4-way valve reversing error
U7
Outdoor fan 1 error protection
L3
Motor stalling
H6
Outdoor fan 2 error protection
LA
PG motor zero-crossing protection
U8
15
Ld
F8
En
F9
FH
F6
EU
Technical Support
Before calling technical support, please see the troubleshooting guide above. You may also visit
our website at www.impecca.com for answers to Frequently Asked Questions and to contact us.
Email: [email protected]
Phone: +1 866–954–4440
Web: www.impecca.com