Chigo CS-25V3A-MA114A User manual

1
CHIGO
Service manual
Room airconditioner
Split Wall-Mounting Type
NOTE:
Before servicing the unit, please first read the service
manual and then contact with your service center if
meet problem

2
Table of the contents
A、Summary…………………………………………………………. page 3
B 、Wiring diagram…………………………………………………. page 4~5
C、Installation………………………………………………………. page 6
D、Exploded view and part list ………………………………….page 16
E、Components fault and test methods……………………….. page 20
F、Failure display……………………………………………………page 29
G、Trouble shooting……………………………………………………………... page 31
H、Usual failure analysis………………………………………….. page 37
I、User’s manual ……………………………………………………page 42~50

3
A、Summary
1、indoor unit
2、outdoor unit
3 、remote controller

4
B 、Wiring diagram
Wiring diagram(INDOOR)
CS-25V3A-MA114A、CS-35V3A-MA114A

5
Wiring diagram(OUTDOOR)
CS-25V3A-Y4N、CS-35V3A-Y4P

6
C、Installation
1、Safety Codes
1）. The service supplier shall urge its service people to take effective human safety measures during operation.
2）. The service people shall select an installation position that is solid, unlikely shocked and able to support the
weight of machines.
3）. To avoid fire, the installation position shall be away from the place where flammable gas exists.
4）. When the outdoor unit is installed or relocated on the 2nd floor of a building or at a height over 2m, the service
people must use the rope with adequate strength to fasten the outdoor unit securely (or take other safety
measures) to prevent the machine from falling down.
5）. For working on height, anti-fall measures shall be taken for the tools and materials used outside the building.
6）.After completion, the installation people must carry out electrical safety inspection. The electrical wiring must
be in conformance to the national or local safety standards to ensure no leakage.
7）. If it is needed to refit the power supply during installation, approval must be obtained from the user and the
operation must be carried out by the people qualified for electrical safety. The result must be in conformance
to the national or local standards on electrical safety.
8）. The service people must check each position of the casing during test run. In case of electric leakage,
immediately stop the machine and check it. If it is the problem of installation, solve it and test again. Ensure
the air conditioner works normally. If it is the problem of air conditioner, report it to the vendor.
9）. During installation, if the service people find that the user’s power supply has the potential safety problem,
they must notify the user and record the details on the warranty card for confirmation, or take corrective
actions.
10）. Before completion of the installation or during removal or installation of the machine, it is prohibited to
switch on the power and start the machine, in order to avoid safety accidents.
11）. The service people must follow the national or local safety rules when using the welding tools. The welding
must be performed by the people with safe operation qualification.
12）. CHIGO has the right to supervise the service supplier for its work safety. The accidents due to the service
supplier’s fault shall be the service supplier’s responsibility.
13）. During installation, the service people shall take care to avoid skid, cutting, scratch, burn, electric shock or
fall. Take care to protect the eyes during welding.
14）. After installation, ensure that the people or objects are away from the machine before you connect the power
supply. Do not switch on the power or test the machine until the power supply is correctly connected.
2、Preparation of installation tools
Table: Configuration of Installation Tools
Tool
1. Impact drill, with Ø70mm bit 1
pc
2. Bit, Ø10mm or Ø12mm 1
pc
3. Slotted screwdriver and cross screwdriver, 1
pc for each (mini slotted screwdriver)
Slotted: 100 or 120mm; Cross: 120
or 145mm
4. Torque wrench (2 pcs), spanner (3 pcs)
Spanner: 8×10, 10×12, 12×14mm
5. Hammer (1 pc)
0.5Kg
6. Electrical knife (1 pc)

7
7. Wire stripper (1 pc)
8. Sharp nose pliers and cutting pliers (1 pc for
each)
Cutting pliers: 150mm
9. Pipe bender (1 set)
10. Pipe expander (1 set)
For the expanding the opening of
the added pipe
11. Pipe cutter (1 pc)
For cutting the excess copper tube)
12. Reamer (1 pc)
For deburring the copper tube
13. File (1 pc)
150 or 200mm
14. Multimeter (1 set)
Level 5.0
15. Leakage detector or soap / sponge (1 pc)
For detecting if there is leakage at
the connection
16. Thermometer or digital temperature meter (1
pc)
For measuring the temperature of
the intake and outlet air of the air
conditioner
17. Pressure gauge
For measuring the working
pressure of the air conditioner
system
18. Level gauge or plummet (1 pc)
19. Putty scraper (1 pc)
20. Hex wrench (1 set)
21. Electric probe
22. Safety belt
23. Rope (acc. to weight-bearing requirements)
24. Laying cloth, cover cloth, shoe covers,
wiping cloth
25. Ladder and other requisite tools
Other auxiliary materials (depending on the site conditions)
Materials
1. Fixing support for outdoor unit
GB/T5059GB/T5213
2. Expansion bolt 10mm (4 pcs)
3. Anchoring bolt (Ø10mm) (with spring
washer) (4 pcs)
4. Concrete nail
5. Heat insulation strap
6. Insulation tape
7. Gypsum powder (1 bag)
8. Copper tube and power cable
9, PVC pipe (optional)
10. Square channel (optional)
For fixing the connection pipes
and wires
11. Others

8
3、Check the machine (whether the appearance is in good condition, and whether the accessories are
complete)
Machine
Inspection
Focus on checking the single cooling, double temperature and cooling capacity
whether conform to the specifications, in terms of the indoor and outdoor units are
compatible, and the style of indoor unit conforms to the requirements.
Look through the observation hole, and check whether the connection pipes,
remote controller, Product Warranty Card and other accessories are complete. If
not, do not open the package but contacting the vendor.
4、Check the user’s power supply (kilowatt-meter capacity, wire diameter, electric leakage protection switch,
ground wire and voltage)
Check the
power supply
Use the multimeter to measure the power voltage, which shall be within +/-10% of
the rated voltage.
Use special line for the power supply of air conditioners, and ensuring that the
capacity of entire supply line (branch line, power line, kilowatt-meter, air switch,
etc) is higher than the maximum rated current of air conditioner.
The power configuration and cable distribution must meet the local requirements
for electrical safety.
Advise the user to apply special air switch, electric leakage protector and other
necessary protection devices for air conditioners. Their capacity shall meet the
needs of air conditioner. For the line with fuse, it is prohibited to use copper wire
to replace the fuse.
Table: The Requirements of Different Models for Power Supply
Table 1 (220V-240V)
Item
Model
Section Area of
Power Cable (mm2)
Circuit Switch
(A)
Split Wall-Mounting Series
25
1.0
10
5 、Selection of Installation Position (Indoor / outdoor lens sequence needs adjustment)

9
Requirement
s for
Installation
Position
The installation shall be operated at the place which is solid, unlikely subject to
shock and able to bear the weight of machine.
The outdoor unit shall be installed at the place which with good ventilation, and
unlikely subject to rain or direct sunshine. Ensuring that the air conditioner can be
easily accessed for maintenance and repair.
Keep the indoor and outdoor units as close as possible. The connection pipe shall be
short as it might be.
To facilitate the air flow, keep adequate space around the indoor and outdoor unit,
and avoid flammable or corrosive gas nearby. The drainage shall not affect the
constructions of dwellers underneath or the user himself.
The machine shall be kept 2m or more away from the electric appliances and heat
source.
Avoid TV set, sound box, computer and other deluxe home appliances below the
indoor unit.
The indoor unit shall be able to blow the cold and hot air evenly to everywhere of
the room.
According to the power supply mode (powered by indoor or outdoor unit) and the
length of power cable, select the position which close to the power supply, in order
to facilitate the connection of power line. Moreover, ensuring that it is not needed to
extend the power cable and selecting a position beyond reach of children.
Determinatio
n of
Installation
Position
Select the final position of indoor and outdoor unit according to the requirements
above (Mark properly if needed).
6、Execution of Installation
Installation of
Wall-mounted
indoor unit
Unpack the machine and take out the accessories, wall-mounting plate and
remote controller. Mount the bundled batteries into the remote controller and
observe for abnormality. Before installation, make sure to energize the indoor
unit and test it by using the remote controller. Observe the fan and swing
louver for their working conditions. If any abnormality occurs, adjust
immediately and install again.

10
Fix the wall-mounting plate according to the selected position of indoor unit
and the route of the pipe.
Firstly, use a steel nail to fix the wall-mounting plate onto the wall. Level it
with the level gauge and then fix tightly.
Note: When installing the models with additional functions (purification
device), we shall take the position of this device into consideration for the
distance to the ceiling.
Select the position of wall-cross hole according to the position of
wall-mounting plate.
Selection of piping mode: Try not to choose the mode of right exit-pipe so as
to ensure the orderliness and smoothness of the pipe.
1. Route the pipe directly along the right side of the machine body. 2. Route
the pipe directly on the rear. When bending the pipe, please support the elbow
with your right hand and then use your left hand to rotate slightly for 90°
before stop. 3. Route the pipe along the left side. This step is the same as the
above step. The only difference is that the bending angle is higher than that in
the previous step, that is, it should be bent to 180°. Take care to rotate this
angle slightly and slowly; Otherwise the pipe would be flattened easily . Then,
drill a hole (shuld be a little larger than the outer diameter of the wall-cross
tube so as to ensure the wall-cross rube can be inserted through). Caution: For
easy drainage of the water out of the internal unit, the indoor unit shall be
mounted slightly higher than the wall-cross hole. Meanwhile, the wall-cross
hole must be inclined outward down.
Make sure to take dustproof measures when drilling holes with the impact
drill.
Hang the indoor unit onto the clamp of the wall-mounting plate. Move the
body of indoor unit left and right, and check if it is fixed tight.
Ceiling
Left
Right
Wall-mounting Plate
Over 15cm
Over 15cm
Over 15cm
Attach with
adhesive tape
5-10mm
lower
Wall-cross pipe
Wall
(Interior)
(Exterior)

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When multiple indoor units are to be installed in one room (e.g. guest hall,
meeting room, restaurant, etc.), full consideration should be made to the
integral appearance and working performance. They should be installed on the
same level (with the upper as the benchmark) and keep a certain distance, thus
to ensure that the working performance of each indoor unit will not be
affected.
Installation of
Outdoor Unit
1. To install the outdoor unit onto the wall, use the bit of fixed depth to drill
holes according to the selected position, but take care to avoid the wall
clearance. Firstly, mount an expansion bolt 10x100 (mm). Then, use the rope
to move the support outdoors and make a simple fixing. Calibrate the level
with level gauge and mark out the other positioning holes. Then, remove the
support and use the impact drill with fixed depth bit to drill the other fixing
holes of the support. Finally, fix the support onto the exterior wall. 6 pcs
required for model 61 or lower, and 8 pcs required for the model over 61.
Note: The expansion tube of the expansion screw must be fully punched into
the wall.
1. Move the outdoor unit out of the room and put it onto the support with care.
Fix with 4 bolts Ø10mm. (Note: The installation people working on the 2nd
floor or higher must wear safety belt. The outdoor unit must be tied securely
with rope before it can be put outdoors. Take anti-fall measures to avoid
accident. ）
2. The outdoor unit is directly onto the ground (e.g. balcony, roof platform,
outdoor ground of the 1st floor, and other platforms that can accommodate the
outdoor unit adequately). According to the size of chassis mounting hole,
select proper expansion screws to fix tightly. The height difference between
indoor and outdoor unit shall not be higher than 5m; otherwise it might cause
difficulty to oil return and affect the service performance.
Required distance of the space around the outdoor unit (unit: mm)
1. With obstacle above
Over 300
Over 600
2. With front side
(outlet port) open
Over 300
Over
300
Over
600
3. With obstacles only on
front side (outlet port)
Over 200
Repair space
Keep repair space on the front side o f the
unit, as shown below.
Over
300
Over
500
Over 500
Repair space
4. With obstacle on both front side and back side
Over 300
Over 2000
5. With obstacles on four sides
Though the upper side is open but
there are obstacles on four sides,
the machine cannot beinstalled
there.
Keep two sides open at least.
Indoor unit
Outdoor
unit

12
Installation Requirements for Multiple Units
1. To install multiple units on the same wall or on the same direction of a
building, all the machines on one floor should be installed on the same level
(based on the level of machine leg), and the transverse spacing shall be kept at
least 60cm or more, as long as the machine performance will not be affected.
2. If there are multiple units on different floors on the same wall or the same
direction of the building, they should be preferably installed on the same
vertical line (based on the left side of the body streamline). To avoid air return
or mutual interference at the outlet, the longitudinal spacing shall be kept at
least 65cm or more.
Requirements for outdoor guardrail (optional): If the user is to install guardrail
for the outdoor unit, the spacing to the machine body must be kept 0.5m or
more.
Insert through
Pipe
Bundle the connection wire to the connection pipe and drainage pipe. (The
connection wire may also be inserted through PVC pipe)
To insert through the pipe, protective measures should be taken to prevent the
expanded bell mouth from damage and prevent the sand from entering the
connection pipe.
Connect to
Machine
Take a connection pipe with expanded mouth, coat frozen oil evenly onto the
connector of the 2-way / 3-way valve and the expanded mouth .
Put the expanded mouth and connector on the same straight line and rotate the
nut to its end with hands, and tighten it with spanner.
Remove the end cover and clip of outdoor connection wire. Then, connect the
wire to position according to color or mark indicated in the wiring diagram.
When the exposed section is fully inserted, use the screw to press it tightly. Do
not cut the round connector at the connection wire end into Y-shape. Fix the
wire with clamp and then fix the end cover of the wire.
Vacuumming
After connecting the pipe between indoor and outdoor unit, it should be
vacuumed with vacuum pump. Operate as follows:
Loosen the nut on low-pressure valve element and filling portal, connect the
vacuum pump to the filling portal by hose with pin, and then start the vacuum
pump. When the indicator gauge points to 15Pa, stop vacuumming and hold
for approx. 30s. Pay attention to the vacuum level. If decreased, be sure to
eliminate the leakage. Repeat the above procedures. When the vacuumming
process is completed, close the vacuum valve and open the high-pressure
valve element for 1/4 turn to fill the refrigerant to the low-pressure section.
Remove the connection hose. Fully open the high-pressure and low-pressure
valves . Tighten the nuts on the valves.

13
Leakage
Detection
Use a sponge soaked with soap water or a leakage detector to check the
connectors and access-valves on indoor and outdoor units. Keep testing for no
less than 3 minutes at each position. When the leakage detection is completed,
do wash away the residual soap water. (Notes: In summer, leakage detection
should be done under stop state. In winter, it should be done under heating
mode). ）
Position Most Likely to Leak
Besides four connectors connecting outdoor pipes, nuts at high-pressure /
low-pressure valve core and filling portal are most likely to leak but often
neglected. Therefore, when installing the machine, make sure to fully open the
valve core to dead position and tighten every nut and check for leakage.
The connector with leakage problem should be reinstalled.
Pipe Wrapping
and Wall Hole
Blocking
Sort the pipeline in good order.
Use pipe bender when bend the pipe with 90°. To avoid flattening or cracking
the pipe without pipe bender, do bend it with a radius as large as possible.
Table: Standard of piping torque:
1. Nut torque of connecting pipe (R410a、R407c)
Outer diameter of copper pipe
Torque
mm
inch
Kg.f/m
φ6.00
1/4
1.8
φ9.52
3/8
4.2
φ12.0
1/2
5.5
φ15.88
5/8
6.6
φ19.05
3/4
6.6
2. Nut torque of connecting pipe (R22)
Outer diameter of steel pipe
Fastening torque
Reinforced
fastening torque
mm
inch
Kgf/m
Kgf/inch
Kgf/m
Kgf/inch
∮6.00
1/4″
1.6
6.3
2.0
7.9
∮9.52
3/8″
3.0
11.8
3.5
13.8
∮12.0
1/2″
5.0
19.7
5.5
21.6
∮15.88
5/8″
7.5
29.5
8.0
31.5
∮19.05
3/4″
12.0
47.2
14
55.1
Nut for high/low pressure
valve element
Nut for
access door

14
Pipeline
wrapping and
wall-hole
blocking
Wrap the connection pipe and machine-connection wires together, water pipe
shall be placed under the connection pipe and shall not be wounded and
intersected, and it shall be wrapped from outdoor unit to indoor unit in case
rainwater entered and had bad influence on temperature and insulation.
Heat insulation measures shall be adopted separately for the pipeline joint of the
indoor unit.
When the pipeline was wrapped, it shall be fixed on the wall by pipe clamps for
every 1m distance.
Block the wall-hole with plaster or putty with the machine, in case the rainwater
and the wind entered. Meanwhile, make the blockage match the wall as possible.
Inspection
before
machine
testing
Check if the internal wires of the unit are connected. It needs to be noted
particularly that the wires shall be connected correspondingly; the grounding
shall be reliable; and all the naked wires shall be pressed tightly. When the
power was off, the insulating electric-resistance of the null line, the live wire and
the ground wire of the plug shall be more than 2 megohm.
Inspect whether the indoor and outdoor units are installed firmly.
Make sure that all people or objectives are away from the machine, do check it’s
safe before turn the power on.
Power supply
connection
Before installation and safety inspection, electrification is strictly forbidden.
Power connection shall be in accordance to the region or country’s safety
requirments, and make sure that wires were firmly connected.
Inspection for
machine test
When the power is on, turn on the machine by remote controller, and press every
buttom to see if the machine responds. If the machine is a floor standing one,
testing it with control panel is required.
Inspect noise and vibration of the machine, if there are any abnormal
phenomena, they shall be debugged or maintained.
Inspect the drainage of the indoor unit. Pour a cup of water on the indoor unit
evaporator and check the draining situation.
Use remote controller (control panel when floor standing machine) to adjust the
indoor fan to carry out switching of high, medium and low air speed, inspect
whether the air swinging is flexible.
Record the data of working voltage, current, system pressure, temperature,
differences of inlet and outlet air etc. under modes of cooling and heating. In
case of abnormal conditions such as smell, scorched flavor, smoking and so on,
do stop the machine for inspection and solving it immediately. If problems
caused by anything from the user, advices shall be given to improve.
Connection
wire
Connection
pipe
Wall-cross
pipe
Drainage pipe

15
. 7 、Introduction of usage and maintenance knowledge
Test of testing
machine
After start, setting cooling or heating mode according to the temperature.
The installation personnel shall introduce the usage of the remote controller in
detail to the user, including the function of every button, and how to judge the
battery shall be changed and how to change. The power shall be cut and the
battery of remote controller shall be taken out when the machine is not used for a
long time.
Introduce the method of disassembling and cleaning the filter net (replacing the
air filter) to the user, and instruct them to operate until they are skillful. The
outdoor unit shall be ventilated, so as to prevent sundries from blocking the
condenser and influencing the heat dissipation. Users can inspect and clean the
condenser and remove sundries when they can guarantee their safety, or they shall
ask professionals for help.
8、Ending (clear the site, collect tools, fill the warranty card and say goodbye to the user)
End of work
Hand over the instruction manual and accessories to the user.
Collect the installation tools and do not ignore anything.
Clean installation site, return the displaced articles and electric appliances.

16
D、Exploded view and part list
1、Indoor: CS-25V3A-MA114A、CS-35V3A-MA114A
1
LOUVER
2
THERMAL INSULATION PIPE
3
SWING LOUVER
4
CONNECTING LEVER
5
WATER RESISTANT RING OF WATERPOUT
6
LOUVER SUPPORT POLE
7
GUIDE BEARING
8
OUTLET PART
9
BASE
10
CROSS FLOW FAN
11
BEARING
12
EVAPORATOR
13
EVAPORATOR PLASTIC LEFT PLATE
14
SCREW COVER
15
CLIP
16
AIR FILTER
17
FRONT PANEL
18
Display lamp panel
19
DISPLAY BOX
20
MIDDLE FRAME COVERPLATE

17
21
MIDDLE FRAME
22
TUBE TEMP. SENSOR HOLDER
23
SPRING OF SENSOR
24
COPPER PIPE OF SENSOR
25
EVAPORATOR RIGHT PLATE 1
26
EVAPORATOR RIGHT PLATE 2
27
MOTOR PLATEN
28
TUBE TEMP. SENSOR
29
ROOM TEMP. SENSOR
30
ELECTRIC CONTROL PLATE
31
TRANSFORMER
32
TERMINAL BOARD
33
WIRE CLIP
34
ELECTRIC BOX
35
INDOOR MOTOR
36
POWER CORD
37
CONNECTING CABLE
38
PIPE CLAMP
39
STEP MOTOR
40
WALL-MOUNTING FRAME
41
REMOTE CONTROLLER

18
2、Outdoor:
CS-25V3A-Y4N、CS-35V3A-Y4P

19
1
Front Grill
2
Front Plate
3
Axial flow fan
4
MotorT
5
Motor support
6
Left protect net
7
Pillar
8
Condenser
9
Top panel
10
Rear Grill
11
Four-way valve assembly
12
Intake pipe for the condensor
13
Suction pipe
14
Capillary Assy
15
Suction pipe
16
Discharge pipe
17
Electrical boxes
18
Right panel
19
Large handle
20
Valve installation plate
21
High-pressure valve
22
Low-pressure valve
23
Base
24
Compressor
25
Partition board

20
E、Components fault and test methods
1、Ordinary compressor
1）: Ordinary test (power off)
Testing method:
Check the compressor by eyeballing first. If there has burnt vestiges on the surface of compressor or the
compressor gives out the bad smell, the reason mainly is that the winding is burnt. If the compressor terminal
is burnt, mostly it is caused by the heavy current or the bad contact.
2）：Resistance test
①、short circuit: Measure resistance of each winding by universal meter, if the resistance value is lower than
the standard, the winding may short circuit.
②、open circuit: Measure resistance of each winding by universal meter, if the resistance value is infinite, the
compressor winding may open circuit.
3）： Electric leakage & insulation test
Measure resistance between the points of winding and other part of compressor by universal meter, if the
resistance value is infinite, means no electric leakage and the insulation is perfect. If the resistance value is
tiny or zero, electric leakage may exist in compressor or insulation material may be aged or broken.
2、AC motor of indoor and outdoor unit
1）、General inspection
Testing method:
In the case of non-power,twist motor rotor by hand,meanwhile shaking motor. checking is there any
rust,whether blocked.
Fault judgement:
If the motor rotor can’t twist, that means the motor blocked. when shaking motor,there should be no
abnormal noise, if the noise of inside the motor is small,it means motor shaft loose.if the noise of inside the
motor is big,it means there is sundries inside of motor or electrical components loose.
2）、DC resistance
（1）turn-to-turn short circuit:measure entire winding resistance by multimet,if the difference between
measured value with standard value is larger,it means turn-to-turn short circuit.
（2）opencoil: measure entire winding resistance by multimet,if the resistance is ∞,means opencoil.
3）、Electric leakage & insulation test
Measure resistance between the points of winding with other part of motor by universal meter, if the
resistance value is infinite, means no electric leakage and the insulation is perfect. If the resistance value is
tiny or zero, electric leakage may exist in motor or insulation material may be aged or broken.
3、general Electric control panel(PCB)
1）、test method for common electronic component,