Klimaire KSIH024H220SW User Manual

Model Numbers:

KSIH009-H225-IW KSIH012-H222-IW KSIH018-H220-IW KSIH024-H220-IW

KSIH MINI- Split Hyper DC

Inverter Air Conditioner

SERVICE MANUAL

Table of Contents

1. Precaution

2. Part Names And Functions

3. Dimension

4. Refrigerant Cycle Diagram

5. Wiring Diagram

6. Installation Details

7. Operation Characteristics

8. Electronic Function

9. Troubleshooting

10. Disassembly Instructions

CONTENTS

1. Precaution .................................................................................................................................................. 1

1.1 Safety Precaution ..................................................................................................................... 1

1.2 Warning .................................................................................................................................... 1

2. Part Names And Functions ....................................................................................................................... 4

2.1 Model Names of Indoor/Outdoor units ...................................................................................... 4

2.2 Part names of Indoor/Outdoor units ................................................................ .......................... 5

3. Dimension ................................................................................................................................................... 6

3.1 Indoor Unit ............................................................................................................................... 6

3.2 Outdoor Unit ............................................................................................................................. 8

4. Refrigerant Cycle Diagram ........................................................................................................................ 9

5. Wiring Diagram......................................................................................................................................... 10

6 Installation Details .................................................................................................................................... 10

6.1 Wrench torque sheet for installation ........................................................................................ 10

6.2 Connecting the cables ............................................................................................................ 10

6.3 Pipe length and the elevation ................................................................................................. 10

6.4 Installation for the first time ..................................................................................................... 10

6.5 Adding the refrigerant after running the system for many years ...............................................11

6.6 Re-installation while the indoor unit need to be repaired ................................ ......................... 12

6.7 Re-installation while the outdoor unit need to be repaired ....................................................... 12

7. Operation Characteristics ....................................................................................................................... 14

8. Electronic Function .................................................................................................................................. 15

8.1 Abbreviation ........................................................................................................................... 15

8.2 Display function ...................................................................................................................... 15

8.3 Main Protection ...................................................................................................................... 16

8.4 Operation Modes and Functions ............................................................................................. 17

9. Troubleshooting ....................................................................................................................................... 22

9.1 Indoor Unit Error Display ........................................................................................................ 23

9.2 Outdoor unit error display ....................................................................................................... 24

9.3 Diagnosis and Solution ........................................................................................................... 28

10 Disassembly Instructions ....................................................................................................................... 57

10.1 Indoor unit ............................................................................................................................ 57

10.2 Outdoor unit ......................................................................................................................... 61

1

1. Precaution

1.1 Safety Precaution

◼ To prevent injury to the user or other

people and property damage, the following

instructions must be followed.

◼ Incorrect operation due to ignoring

instruction will cause harm or damage.

◼ Before service the unit, be sure to

read this service manual at first.

1.2 Warning

➢ Installation

◼ Do not use a defective or underrated

circuit breaker. Use this appliance on a

dedicated circuit.

There is risk of fire or electric shock.

◼ For electrical work, contact the

dealer, seller, a qualified electrician, or an

authorized service center.

Do not disassemble or repair the product,
there is risk of fire or electric shock.

◼ Always ground the product.

There is risk of fire or electric shock.

◼ Install the panel and the cover of

control box securely.

There is risk of fire of electric shock.

◼ Always install a dedicated circuit and

breaker.

Improper wiring or installation may cause
electric shock.

◼ Use the correctly rated breaker of

fuse.

There is risk of fire or electric shock.

◼ Do not modify or extend the power

cable.

There is risk of fire or electric shock.

◼ Do not install, remove, or reinstall the

unit by yourself (customer).

There is risk of fire, electric shock, explosion,
or injury.

◼ Be caution when unpacking and

installing the product.

Sharp edges could cause injury, be
especially careful of the case edges and the
fins on the condenser and evaporator.

◼ For installation, always contact the

dealer or an authorized service center.

◼ Do not install the product on a

defective installation stand.

◼ Be sure the installation area does not

deteriorate with age.

If the base collapses, the air conditioner
could fall with it, causing property damage,
product failure, and personal injury.

◼ Do not let the air conditioner run for

a long time when the humidity is very high

and a door or a window is left open.

◼ Take care to ensure that power cable

could not be pulled out or damaged during

operation.

There is risk of fire or electric shock.

◼ Do not place anything on the power

cable.

There is risk of fire or electric shock.

◼ Do not plug or unplug the power

supply plug during operation.

There is risk of fire or electric shock.

◼ Do not touch (operation) the product

with wet hands.

◼ Do not place a heater or other

appliance near the power cable.

There is risk of fire and electric shock.

◼ Do not allow water to run into

electrical parts.

It may cause fire, failure of the product, or
electric shock.

◼ Do not store or use flammable gas or

combustible near the product.

There is risk of fire or failure of product.

◼ Do not use the product in a tightly

closed space for a long time.

Oxygen deficiency could occur.

◼ When flammable gas leaks, turn off

the gas and open a window for ventilation

before turn the product on.

◼ If strange sounds or smoke comes

from product, turn the breaker off or

disconnect the power supply cable.

2

There is risk of electric shock or fire.

◼ Stop operation and close the window

in storm or hurricane. If possible, remove
the product from the window before the

hurricane arrives.

There is risk of property damage, failure of
product, or electric shock.

◼ Do not open the inlet grill of the

product during operation. (Do not touch the
electrostatic filter, if the unit is so

equipped.)

There is risk of physical injury, electric shock,
or product failure.

◼ When the product is soaked, contact

an authorized service center.

There is risk of fire or electric shock.

◼ Be caution that water could not enter

the product.

There is risk of fire, electric shock, or product
damage.

◼ Ventilate the product from time to

time when operating it together with a stove

etc.

There is risk of fire or electric shock.

◼ Turn the main power off when

cleaning or maintaining the product.

There is risk of electric shock.

◼ When the product is not be used for

a long time, disconnect the power supply

plug or turn off the breaker.

There is risk of product damage or failure, or
unintended operation.

◼ Take care to ensure that nobody

could step on or fall onto the outdoor unit.

This could result in personal injury and
product damage.

➢ CAUTION

◼ Always check for gas (refrigerant)

leakage after installation or repair of

product.

Low refrigerant levels may cause failure of
product.

◼ Install the drain hose to ensure that

water is drained away properly.

A bad connection may cause water leakage.

◼ Keep level even when installing the

product.

It can avoid vibration of water leakage.

◼ Do not install the product where the

noise or hot air from the outdoor unit could

damage the neighborhoods.

It may cause a problem for your neighbors.

◼ Use two or more people to lift and

transport the product.

◼ Do not install the product where it

will be exposed to sea wind (salt spray)

directly.

It may cause corrosion on the product.
Corrosion, particularly on the condenser and
evaporator fins, could cause product
malfunction or inefficient operation.

➢ Operational

◼ Do not expose the skin directly to

cool air for long time. (Do not sit in the

draft).

◼ Do not use the product for special

purposes, such as preserving foods, works
of art etc. It is a consumer air conditioner,

not a precision refrigerant system.

There is risk of damage or loss of property.

◼ Do not block the inlet or outlet of air

flow.

◼ Use a soft cloth to clean. Do not use

harsh detergents, solvents, etc.

There is risk of fire, electric shock, or
damage to the plastic parts of the product.

◼ Do not touch the metal parts of the

product when removing the air filter. They

are very sharp.

◼ Do not step on or put anything on the

product. (outdoor units)

◼ Always insert the filter securely.

Clean the filter every two weeks or more

often if necessary.

A dirty filter reduces the efficiency of the air
conditioner and could cause product
malfunction or damage.

◼ Do not insert hands or other objects

through air inlet or outlet while the product

is operated.

3

◼ Do not drink the water drained from

the product.

◼ Use a firm stool or ladder when

cleaning or maintaining the product.

Be careful and avoid personal injury.

◼ Replace the all batteries in the

remote control with new ones of the same
type. Do not mix old and new batteries or

different types of batteries.

There is risk of fire or explosion.

◼ Do not recharge or disassemble the

batteries. Do not dispose of batteries in a

fire.

They may burn of explode.

◼ If the liquid from the batteries gets

onto your skin or clothes, wash it well with
clean water. Do not use the remote of the

batteries have leaked.

4

Series

Capacity

Indoor units

Outdoor units

Inverter

9k

KSIH009-H225-IW

KSIH009-H225-O

12k

KSIH012-H222-IW

KSIH012-H222-O

18k

KSIH018-H220-IW

KSIH018-H220-O

24k

KSIH024-H220-IW

KSIH024-H220-O

2. Part Names and Functions

2.1 Model Names of Indoor/Outdoor units

5

2.2 Part names of Indoor/Outdoor units

6

Model W D

H

KSIH009-H225-IW

32.9 in (835 mm)

7.8 in (198 mm)

11.0 in (280 mm)

KSIH012-H222-IW

39.0 in (990 mm)

8.6 in (218 mm)

12.4 in (315 mm)

KSIH018-H220-IW

KSIH024-H220-IW

46.7 in (1186 mm)

10.2 in (258 mm)

13.5 in (343 mm)

W D

3. Dimension

3.1 Indoor Unit

7

For KSIH009-H225-IW

For KSIH012-H222-IW, KSIH018-H220-IW

For KSIH024-H220-IW

8

Model

W in

(mm)

D in

(mm)

H in (mm)

W1 in
(mm)

A in

(mm)

B in

(mm)

KSIH009-H225-O

31.5

(800)

13.11
(333)

21.81
(554)

34.25

(870)

20.24
(514)

13.39
(340)

KSIH012-H222-O

KSIH018-H220-O

33.27
(845)

14.29
(363)

27.64
(702)

35.98
(914)

21.26
(540)

13.78
(350)

KSIH024-H220-O

37.24
(946)

16.14
(410)

31.89
(810)

40.55

(1030)

26.50
(673)

15.87
(403)

More than 60cm(23.6in)

More than 70cm(27.6in)

More than 30cm(11.8in)

More than 60cm(23.6in)
(Service space)

Fence or

obstacles

More than 30cm(11.8in)

3.2 Outdoor Unit

Note: The above drawing is only for reference. The appearance of your units may be different.

9

LIQUID SIDE

GAS SIDE

HEAT
EXCHANGE
(EVAPORATOR)

HEAT
EXCHANGE
(CONDENSER)

Compressor

2-WAY VALVE

3-WAY VALVE

4-WAY VALVE

COOLING
HEATING

T2 Evaporator
temp. sensor

T1 Room temp.
sensor

T3 Condenser
temp. sensor

Accumulator

TP Discharge temp. sensor

T4 Ambient
temp. sensor

INDOOR OUTDOOR

Electronic
expansion valve

CAPILLARY
tube

4. Refrigerant Cycle Diagram

10

Outside diameter

Torque

Additional tightening

torque

Ф6.35mm

1/4in

1500N.cm(153kgf.cm)

1600N.cm(163kgf.cm)

Ф9.52mm

3/8in

2500N.cm(255kgf.cm)

2600N.cm(265kgf.cm)

Ф12.7mm

1/2in

3500N.cm(357kgf.cm)

3600N.cm(367kgf.cm)

Ф15.9mm

5/8in

4500N.cm(459kgf.cm)

4700N.cm(479kgf.cm)

Ф19mm

3/4in

6500N.cm(663kgf.cm)

6700N.cm(683kgf.cm)

Appliance Amps

AWG Wire Size

10

18

13

16

18

14

25

12

30

10

Models

Pipe size

Gas

Liquid

KSIH009-H225-IW +
KSIH009-H225-O

3/8in (9.52 mm)

1/4in (6.35 mm)

KSIH012-H222-IW +
KSIH012-H222-O

1/2in (12.7 mm)

1/4in (6.35 mm)

KSIH018-H220-IW +
KSIH018-H220-O

KSIH024-H220-IW +

5/8in (15.9 mm)

3/8in (9.52 mm)

Models

Standard

Max.

Max.

Additional

Length

Elevation

Length

Refrigerant

KSIH009-H225-IW+
KSIH009-H225-O

24.6 ft

(7.5m)

32.8 ft
(10m)

82.0 ft
(25m)

0.16 oz/ft

(15g/m)

KSIH012-H222-IW+
KSIH012-H222-O

KSIH018-H220-IW+
KSIH018-H220-O

24.6 ft
(7.5m)

65 ft

(20m)

98 ft

(30m)

0.16oz/ft
(15g/m)

KSIH024-H220-IW+
KSIH024-H220-O

24.6 ft
(7.5m)

82 ft

(25m)

164 ft
(50m)

0.32oz/ft
(30g/m)

5. Wiring Diagram

(Pls refer the wiring diagram on the unit)

6 Installation Details

6.1 Wrench torque sheet for nstallation

6.2 Connecting the cables

The power cord should be selected according
to the following specifications sheet.

The cable size and the current of the fuse or
switch is determined by the maximum
current indicated on the nameplate which
located on the side panel of the unit. Please
refer to the nameplate before selecting the
cable, fuse and switch.

6.4 Installation for the first time

Air and moisture in the refrigerant system have
undesirable effects as below:

● Pressure in the system rises.

● Operating current rises.

● Cooling or heating efficiency drops.

● Moisture in the refrigerant circuit may

freeze and block capillary tubing.

● Water may lead to corrosion of parts in the
refrigerant system.

Therefore, the indoor units and the pipes
between indoor and outdoor units must be leak
tested and evacuated to remove gas and
moisture from the system.

Gas leak check (Soap water method):

Apply soap water or a liquid neutral
detergent on the indoor unit connections or
outdoor unit connections by a soft brush to
check for leakage of the connecting points of
the piping. If bubbles come out, the pipes have
leakage.

6.3 Pipe length and the elevation

11

1. Air purging with vacuum pump

1) Completely tighten the flare nuts of the

indoor and outdoor units, confirm that both
the 2-way and 3-way valves are set to the
closed position.

2) Connect the charge hose with the push pin

of handle lo to the 3-way valves gas service
port.

3) Connect the charge hose of handle hi
connection to the vacuum pump.

4) Fully open the handle Lo of the manifold
valve.

5) Operate the vacuum pump to evacuate.

6) Make evacuation for 30 minutes and check

whether the compound meter indicates -

0.1Mpa(14.5Psi). If the meter does not
indicate -0.1Mpa(14.5Psi) after pumping 30
minutes, it should be pumped 20 minutes
more. If the pressure can’t achieve -

0.1Mpa(14.5Psi) after pumping 50 minutes,
please check if there are some leakage
points. Fully close the handle Lo valve of
the manifold valve and stop the operation of
the vacuum pump. Confirm that the gauge
needle does not move (approximately 5
minutes after turning off the vacuum pump).

7) Turn the flare nut of the 3-way valves about

45° counterclockwise for 6 or 7seconds
after the gas coming out, then tighten the
flare nut again. Make sure the pressure
display in the pressure indicator is a little
higher than the atmosphere pressure. Then
remove the charge hose from the 3-way
valve.

8) Fully open the 2-way valve and 3-way valve

and securely tighten the cap of the 3-way

valve.

6.5 Adding the refrigerant after

running the system for many years

Procedure

1). Connect the charge hose to the 3-way
service port, open the 2-way valve and the 3­way valve.
Connect the charge hose to the valve at the
bottom of the cylinder. If the refrigerant is
R410A, make the cylinder bottom up to ensure
liquid charge.

2). Purge the air from the charge hose.
Open the valve at the bottom of the cylinder
and press the check valve on the charge set to
purge the air (be careful of the liquid
refrigerant).

3) Put the charging cylinder onto the electronic
scale and record the weight.

4) Operate the air conditioner at the cooling
mode.

5) Open the valves (Low side) on the charge
set and charge the system with liquid
refrigerant.

6). When the electronic scale displays the
proper weight (refer to the gauge and the
pressure of the low side), disconnect the
charge hose from the 3-way valve’s service port
immediately and turn off the air conditioner
before disconnecting the hose.

7). Mount the valve stem caps and the service
port
Use torque wrench to tighten the service port
cap to a torque of 18N.m.
Be sure to check for gas leakage.

12

6.6 Re-installation while the indoor

unit need to be repaired

1. Collecting the refrigerant into the outdoor

unit

2.Air purging with vacuum pump

Procedure

1). Confirm that both the 2-way and 3-way

valves are set to the opened position
Remove the valve stem caps and confirm that
the valve stems are in the opened position.
Be sure to use a hexagonal wrench to operate
the valve stems.

2). Connect the charge hose with the push pin

of handle lo to the 3-way valves gas service
port.

3). Air purging of the charge hose.

Open the handle Lo valve of the manifold valve
slightly to purge air from the charge hose for 5
seconds and then close it quickly.

4). Set the 2-way valve to the close position.

5). Operate the air conditioner at the cooling

cycle and stop it when the gauge indicates

0.1Mpa(14.5psi).

6). Set the 3-way valve to the closed position

immediately
Do this quickly so that the gauge ends up
indicating 0.3Mpa (43.5Psi) to 0.5 Mpa
(72.5psi).
Disconnect the charge set and tighten the 2­way and 3-way valve’s stem nuts.
Use a torque wrench to tighten the 3-way
valves service port cap to a torque of 18N.m.
Be sure to check for gas leakage.

1) Completely tighten the flare nuts of the
indoor and outdoor units, confirm that both the
2-way and 3-way valves are set to the closed
position.

2) Connect the charge hose with the push pin
of handle lo to the 3-way valves gas service
port.

3) Connect the charge hose of handle hi
connection to the vacuum pump.

4) Fully open the handle Lo of the manifold
valve.

5) Operate the vacuum pump to evacuate.

6) Make evacuation for 30 minutes and check
whether the compound meter indicates -0.1Mpa
(14.5psi). If the meter does not indicate -

0.1Mpa (14.5psi) after pumping 30 minutes, it
should be pumped 20 minutes more. If the
pressure can’t achieve -0.1Mpa (14.5psi) after
pumping 50 minutes, please check if there are
some leakage points. Fully close the handle Lo
valve of the manifold valve and stop the
operation of the vacuum pump. Confirm that the
gauge needle does not move (approximately 5
minutes after turning off the vacuum pump).

7)Turn the flare nut of the 3-way valves about
45° counterclockwise for 6 or 7seconds after
the gas coming out, then tighten the flare nut
again. Make sure the pressure display in the
pressure indicator is a little higher than the
atmosphere pressure. Then remove the charge
hose from the 3-way valve.

8) Fully open the 2-way valve and 3-way valve

13

and securely tighten the cap of the 3-way valve.

6.7 Re-installation while the outdoor

unit need to be repaired

1. Evacuation for the whole system

Procedure:

1). Confirm that both the 2-way and 3-way valves

are set to the opened position.

2). Connect the vacuum pump to 3-way valve’s

service port.

3). Evacuation for approximately one hour.

Confirm that the compound meter indicates -

0.1Mpa (14.5Psi).

4). Close the valve (Low side) on the charge

set, turn off the vacuum pump, and confirm that
the gauge needle does not move
(approximately 5 minutes after turning off the
vacuum pump).

5). Disconnect the charge hose from the

vacuum pump.

2. Refrigerant charging

Connect the charge hose which you
disconnected from the vacuum pump to the
valve at the bottom of the cylinder. If the
refrigerant is R410A, make the cylinder bottom
up to ensure liquid charge.

2). Purge the air from the charge hose
Open the valve at the bottom of the cylinder
and press the check valve on the charge set to
purge the air (be careful of the liquid
refrigerant).

3) Put the charging cylinder onto the electronic
scale and record the weight.

4). Open the valves (Low side) on the charge
set and charge the system with liquid
refrigerant
If the system cannot be charge with the
specified amount of refrigerant or can be
charged with a little at a time (approximately
150g each time), operating the air conditioner in
the cooling cycle; however, one time is not
sufficient, wait approximately 1 minute and then
repeat the procedure.

5). When the electronic scale displays the
proper weight, disconnect the charge hose from
the 3-way valve’s service port immediately
If the system has been charged with liquid
refrigerant while operating the air conditioner,
turn off the air conditioner before disconnecting
the hose.

6). Mount the valve stem caps and the service
port. Use torque wrench to tighten the
service port cap to a torque of 18N.m. Be sure
to check for gas leakage.

Procedure:

1). Connect the charge hose to the charging

cylinder, open the 2-way valve and the 3-way
valve

14

Temperature

Mode

Cooling operation

Heating operation

Drying operation

Room temperature

17℃～32℃

(62℉～90℉)

0℃～30℃

(32℉～86℉)

10℃～32℃

(50℉～90℉)

Outdoor temperature

KSIH009-H225-IW
KSIH012-H222-IW
KSIH018-H220-IW
KSIH024-H220-IW

-30°C～50°C

(-22°F～122°F)

-30°C～30°C

(-22°F～86°F)

0°C～50°C

(32°F～122°F)

7. Operation Characteristics

󰇛󰇜

󰇛󰇜 

CAUTION:

1. If the air conditioner is used beyond the above conditions, certain safety protection features may come

into operation and cause the unit to operate abnormally.

2. The room relative humidity should be less than 80%. If the air conditioner operates beyond this figure,

the surface of the air conditioner may attract condensation. Please set the vertical air flow louver to its
maximum angle (vertically to the floor) and set HIGH fan mode.

3. The optimum performance will be achieved during this operating temperature zone.

+32



15

ION indication lamp (optional function) ：This lamp illuminates when Clean
Air feature is activated.

DEFROST indication lamp (For cooling & heating models only): Lights up
when the air conditioner starts defrosting automatically or when the warm air control
feature is activated in heating operation.

OPERATION indication lamp：This lamp illuminates when the air conditioner is in
operation.

TIMER indication lamp：Lights up during Timer operation.

Temperature indicator：Displays the temperature settings when the air

conditioner is operational. Displays the malfunction code.

8. Electronic Function

8.1 Abbreviation

T1: Indoor room temperature
T2: Coil temperature of evaporator
T3: Coil temperature of condenser
T4: Outdoor ambient temperature
TP: Compressor discharge temperature

8.2 Display function

8.2.1 Icon explanation on indoor display board.

16

8.3 Main Protection

8.3.1 Three minutes delay at restart for

compressor

Less than 1-minute delay for the 1st time stand­up and 3 minutes delay for others.

8.3.2 Temperature protection of compressor

top

The unit will stop working when the compressor
top temp. protector cut off and will restart after
the compressor top temp. protector restart.

8.3.3 Temperature protection of compressor

discharge

Compressor discharge temp. TP>115℃ (239°F)
for 5s, compressor stops.

8.3.4 Fan speed is out of control

When Indoor fan speed keeps too low
(300RPM) or too high(1500RPM) for certain
time, the unit will stop and the LED will display
the failure

8.3.5 Inverter module protection

The Inverter module has a protection function
about current, voltage and temperature. If these
protections happen, the corresponding code will
display on indoor unit and the unit will stop
working.

8.3.6 Indoor fan delayed open function

When the unit starts up, the louver will be active
immediately and the indoor fan will open 10s
later.
If the unit runs in heating mode, the indoor fan
will be also controlled by anti-cold wind

function.

8.3.7 Compressor preheating functions

Preheating permitting condition:
When T4(outdoor ambient temperature) ＜3°C
(37.4°F), the preheating function will be
activated

8.3.8 Zero crossing detection error

protection

If AC detects time interval is not correct for
continuous 240s, the unit will stop and the LED
will display the failure. The correct zero
crossing signal time interval should be between
6-13ms.

8.3.9 Sensor protection at open circuit and

breaking disconnection.

When there’s only one temperature sensor in
malfunction, the air conditioner will keep
working but show the error code, in case of any
emergency use.
When there’s more than one temperature sensor
in malfunction, the air conditioner will stop
working

8.3.10 Refrigerant leakage detection

This function is only active in cooling mode. It
can better prevent the compressor being
damaged by refrigerant leakage or compressor
overload.
Open condition:
When compressor is active, the value of the Coil
temperature of evaporator T2 has no change or
very little change.

17

Setting fan

speed

Actual fan speed

H+(H+=H+G)
A H（=H）
B
C

M+(M+=M+Z)
D M(M=M)
E
F

L+(L+=L+D)
G L(L=L)
H
I

T1-Td ℃(°F)

L

L-(L-=L-D)

H

H-（H-=H-G)

M

M-(M-=M-Z)

a

b

c

d

T1

e

T4

A+

A

B

C

D
E

a

b

c

d

T1

e

T3

Resume

Off

Decrease

Hold

8.4 Operation Modes and Functions

8.4.1 Fan mode

(1) Outdoor fan and compressor stop.
(2) Temperature setting function is disabled, and
no setting temperature is displayed.
(3) Indoor fan can be set to high/med/low/auto.
(4) The louver operates same as in cooling
mode.
(5) Auto fan:

8.4.2 Cooling Mode

8.4.2.1 Compressor running rules

When T1-Ts<-2℃(28.4°F), the compressor will
stop,
when T1—TS>-0.5℃(31.1°F)，the compressor
will be activated.
When the AC run in mute mode, the compressor
will run with low frequency.
When the current is more than setting value, the
current protection function will be activated, and
the compressor will stop.

8.4.2.2 Outdoor fan running rules

The outdoor unit will be run at different fan speed
according to T4.

For different outdoor units, the fan speeds are
different

the speed can be selected as high, medium, low
and auto.
When the setting temp. is reached, if the
compressor stops running, indoor fan motor will
run in Minimum speed or setting speed.
The indoor fan is controlled as below:

The auto fan acts as below rules:

8.4.2.3 Condenser temperature protection

When condenser temperature temp. is more than
setting value, the compressor will stop.

8.4.2.3 Indoor fan running rules

In cooling mode, indoor fan runs all the time and

8.4.2.5 Evaporator temperature protection

When Evaporator temperature temp.is less than
setting value, the compressor will stop

8.4.3 Heating Mode

8.4.3.1 Compressor running rules

When T1-Ts>-ΔT, the compressor will stop,
when T1-T

<ΔT-1.5，the compressor will be on.

S

ΔT is the programmed parameter of temperature
compensation.

18

Setting fan

speed

Actual fan speed

H（=H）

H+(H+=H+G)

M(M=M)

M+(M+=M+Z)

L(L=L)

L+(L+=L+D)

H-（H-=H-G)

M-(M-=M-Z)

L-(L-=L-D)

T1-Td℃

LHM

T4

E

D

C

B

A
A+

T1-Td+¦ ¤T

Resume

Off

Decrease

Hold

When the AC run in mute mode, the compressor
will run with low frequency.
When the current is more than setting value, the
current protection function will be activated and
the compressor will stop.

8.4.3.2 Outdoor fan running rules

The outdoor unit will be run at different fan speed
according to T4.

For different outdoor units, the fan speeds are
different

8.4.3.3 Indoor fan running rules
When the compressor is on, the indoor fan can be
set to high/med/low/auto/mute.
When indoor unit coil temp. is low, the anti-cold air
function will start and indoor fan motor will run at
low speed, the speed can’t be changed, when the
temp. is lower than setting value, the indoor fan
motor will stop.
When the indoor temp reaches the setting temp.,
the compressor will stop, the indoor fan motor will
run at the minimum speed or setting speed. (The
anti-cold air function is valid).
The indoor fan is controlled as below:

8.4.3.4 Defrosting mode

AC will enter the defrosting mode according to the
value of temp. of T3 and the value range of temp.
change of T3 and also the compressor running
time.
During the defrosting mode, the compressor
keeps running, indoor and outdoor motor will
stop, defrost lamp of the indoor unit will be

lighted “ .” Will be displayed.

8.4.3.5 Evaporator coil temperature protection

Auto fan action in heating mode:

When evaporator temperature temp. is more than
the setting protection value, the compressor will
stop.

8.4.4 Auto-mode

This mode can be chosen with remote controller
and the setting temperature can be changed
between 17°C(62.6°F) ~30°C(86°F).
In auto mode, the machine will choose cooling,
heating or fan-only mode according to ΔT (ΔT
=T1-Ts).

19

T1-Ts

Cooling

Heating*

Fan only

Heating*: For cooling only models, they will run at
fan speed

Indoor fan will run at auto fan of the relevant mode.
The louver operates same as in relevant mode.
If the machine switches mode between heating
and cooling, the compressor will keep stopping
for certain time and then choose mode according
to T1-Ts.
If the setting temperature is modified, the
machine will choose running function again.

8.4.5 Drying mode

8.4.5.1 Indoor fan speed is fixed at breeze and
can’t be changed. The louver angle is the same
as in cooling mode.

8.4.5.2 Low indoor room temperature protection
In drying mode, if room temperature is lower than
10°C (50°F), the compressor will stop and not
resume until room temperature exceeds 12°C
(53.6°F).

8.4.5.3 Evaporator anti-freezing protection,
condenser high temperature protection and
outdoor unit frequency limit are active and the
same as that in cooling mode.

8.4.5.4 The outdoor fan operates the same as in
cooling mode.

8.4.6 Forced operation function

8.4.6.1 Enter forced operation function:
When the machine is off, pressing the touch
button will carry the machine to forced auto
mode. If pressing the button once again within 5
seconds, the machine will turn into forced cooling
mode.
In forced auto, forced cooling or any other
operation mode, pressing touch button will turn

off the machine.

8.4.6.2 In forced operation mode, all general
protections and remote control are available.

8.4.6.3 Operation rules:
Forced cooling mode:
The compressor runs at F2 frequency and indoor
fan runs as breeze. After running for 30 minutes.
the machine will turn to auto mode as 24°C
(75.2°F) setting temperature.
Forced auto mode:
The action of forced auto mode is the same as
normal auto mode with 24°C (75.2°F) setting
temperature.

8.4.7 Auto-Restart function

The indoor unit is equipped with auto-restart
function, which is carried out through an auto­restart module. In case of a sudden power
failure, the module memorizes the setting
conditions before the power failure. The unit will
resume the previous operation setting (not
including swing function) automatically after 3
minutes when power returns.
If the memorization condition is forced cooling
mode, the unit will run in cooling mode for 30
minutes and turn to auto mode as 24°C (75.2°F)
setting temp.
If AC is off before power off and AC is required to
start up now, the compressor will have 1-minute
delay when power on. Other conditions, the
compressor will have 3 minutes delay when
restarts.

8.4.8 Refrigerant Leakage Detection

With this new technology, the display area will
show “EC” when the outdoor unit detects
refrigerant leakage.

8.4.9 8°C Heating(optional)

When the compressor is running, the indoor fan
motor will run without anti-cold air function.
When the compressor is off, the indoor fan motor
is off

20

Enquiry information

Displaying code

Meaning

T1

T1

T1 temp.

T2

T2

T2 temp.

T3

T3

T3 temp.

T4

T4

T4 temp.

T2B

Tb

T2B temp.

TP

TP

TP temp.

TH

TH

TH temp.

Targeted Frequency

FT

Targeted Frequency

Actual Frequency

Fr

Actual Frequency

Indoor fan speed

IF

Indoor fan speed

Outdoor fan speed

OF

Outdoor fan speed

EXV opening angle

LA

EXV opening angle

Compressor continuous running time

CT

Compressor continuous
running time

Causes of compressor stop.

ST

Causes of compressor
stop.

Reserve

A0

Reserve

A1 Reserve

0 Reserve

1 Reserve

2

Reserve

3

Reserve

4

Reserve

5

Reserve

6 Reserve

L Reserve

A Reserve

U Reserve

T

8.4.10 Point check function

Press the LED DISPLAY or LED or MUTE button of the remote controller three times, and then press the

AIR DIRECTION or SWING button three times in ten seconds, the buzzer will keep ring for two seconds.

The air conditioner will enter into the information enquiry status. You can press the LED DISPLAY or AIR
DIRECTION button to check the next or front item’s information.

When the AC enter the “information enquiry” status, it will display the code name in 2 seconds, the details

are as follows.

When the AC enter into the information enquiry status, it will display the code value in the next 25s, the

details are as follows.

21

Enquiry
information

Display value

Meaning

Remark

T1, T2, T3,
T4, T2B, TP,
TH, Targeted
Frequency,
Actual
Frequency

-1F,-1E,-1d,-1c,­1b,-1A

-25,-24,-23,-22,-21,­20

1. All the displaying temperature is actual

value.

2. All the temperature is °C no matter
what kind of remote controller is used.

3. T1, T2, T3, T4, T2B display range : ­25~70,
TP display range: -20~130.

4. Frequency display range: 0~159Hz.

5. If the actual value exceeds the range, it
will display the maximum value or minimum
value.

-19—99

-19—99

A0,A1,…A9

100,101,…109

b0,b1,…b9

110,111,…119

c0,c1,…c9

120,121,…129

d0,d1,…d9

130,131,…139

E0,E1,…E9

140,141,…149

F0,F1,…F9

150,151,…159

Indoor fan
speed
/Outdoor fan
speed

0

OFF

1,2,3,4

Low speed, Medium
speed, High speed,
Turbo

For some big capacity motors.

14-FF

Actual fan
speed=Display value
turns to decimal
value and then
multiply 10. The unit
is RPM.

For some small capacity motors,
display value is from 14-FF(hexadecimal),
the corresponding fan speed range is from
200-2550RPM.

EXV opening
angle

0-FF

Actual EXV opening
value=Display value
turns to decimal
value and then
multiply 2.

Compressor
continuous
running time

0-FF

0-255 minutes

If the actual value exceeds the
range, it will display the maximum
value or minimum value.

Causes of
compressor
stop.

0-99

For the detailed
meaning, please
consult with engineer

Decimal display

Reserve

0-FF

22

9. Troubleshooting

Safety

Electricity power is still kept in capacitors even the power supply is shut off. Do not forget to discharge the electricity
power in capacitor.

Electrolytic Capacitors

(HIGH VOLTAGE! CAUTION!)

For other models, please connect discharge resistance (approx.100Ω 40W) or soldering iron (plug) between +, ­terminals of the electrolytic capacitor on the contrary side of the outdoor PCB.

Note: The picture above is only for reference. The plug of your side may be different.

23

Operation

lamp

Timer lamp

Display

LED STATUS

☆ 1 time

X

E0

Indoor unit EEPROM parameter error

☆ 2 times

X

E1

Indoor / outdoor units communication error

☆ 3 times

X

E2

Zero-crossing signal detection error

☆ 4 times

X

E3

Indoor fan speed has been out of control

☆ 5 times

X

E4

Indoor room temperature sensor T1 open circuit or
short circuit

☆ 6 times

X

E5

Evaporator coil temperature sensor T2 open circuit or
short circuit

☆ 7 times

X

EC

Refrigerant leakage detection

☆ 1 times

O

F0

Overload current protection

☆ 2 times

O

F1

Outdoor ambient temperature sensor T4 open circuit or
short circuit

☆ 3 times

O

F2

Condenser coil temperature sensor T3 open circuit or
short circuit

☆ 4 times

O

F3

Compressor discharge temperature sensor TP open
circuit or short circuit

☆ 5 times

O

F4

Outdoor unit EEPROM parameter error

☆ 6 times

O

F5

Outdoor fan speed has been out of control

☆ 1 times

☆

P0

IPM malfunction or IGBT over-strong current protection

☆ 2 times

☆

P1

Over voltage or over low voltage protection

☆ 3 times

☆

P2

High temperature protection of IPM module

☆ 5 times

☆

P4

Inverter compressor drive error

☆ 7 times

☆

P6

Low pressure protection (Only for 36K)

9.1 Indoor Unit Error Display

O（light） X（off） ☆（flash）

Trouble shooting:

Use the remote controller. If the unit does not respond to the remote, the indoor PCB needs to be
replaced; if the unit does respond, then the display board needs to be replaced.

24

No.

Problems

LED3
(Green)

LED2
(Red)

IU display

1

Standby for normal

O

X

2

Operation normally

X

O

3

IPM malfunction or IGBT over-strong current protection

☆ X P0

4

Over voltage or too low voltage protection

O O P1

5

EEPROM parameter error

O ☆ E5

6

Inverter compressor drive error

X ☆ P4 7 Inverter compressor drive error

☆ O P4 8 Inverter compressor drive error

☆ ☆ P4

Suction

Exhaust

+

17122200000309

HuiQi

TestPort

1

1

HEAT

4-WAY

W

BLUE

BLACK

RED

V

U

TPT3T4

No

NO

NO
YES

Low-Fre

No

Have

YES

Have

Temp-Pro

Rdi

Ripm

11

PMV

44

15V17V

[V1.8] 2015-01-16

7815

22

1

34

REACTOR

311 TEST

7805

N- IN

DC- FAN AC- FAN

L-I N

S

KFR-72W/BP2-(311+0515+6061HD+PSS30S92F6-AG+6822+HEAT).D.13.WP2.1

12V 5V

CN3

DSA1

K

A

K

D5

R18

R46

R107A

R515A

R316A

R18A

IC403

D4

C21

R54

R55

R68

R69

R56

R90

C14

J4

R16

R52

J5

+

LED1

R78

R142

R141

R155

R154

R153

R152

R151

R150

C3

R108

R107

RC2

RC4

RC1

RC3

C1

FUSE1

65T 250V30A

ZR1

ZR2

CN30

R109

R58

R61

R60

R59

C301

C76

C312

R315

C83

C85

C86

C91

R156R158

R169

R170

R171

R172

IC34

D11

R157

R159

C310

C306

C308

C311

C307

C309

R110

E305

C302

+

DZ301

Q3

R75

R84

C103

CN28

CN29

CN6-1

CN6

CN13

CN12

CN2

CN8

CN7

CN22

DR

CN21

DR

R102

J6

PTC1

CN414

R127

C105

+

E5

IPM2

C501

C503

C507

C508

C509

C510

C511

C512

C517

+

DZ501

R501

R502

R503

R504

R505

R506

R509

R510

R511

R512

R513

R514

R523

C502

C505

+

DZ502

R515

R522

+

DZ504

C504

R316

~ ~

IN

AC

-
+

R101
R100

R71

C42

CN20

RY5

CN16

CN18

NTC4

C8

C513

C514

C515

C516

R516
R517

R518
R519

R520

R521

C27

IC7

24LC512

33

49

17

1

IC9

R53

IC101

R160

+

E4

+

E3

R83

R82R81

R80

R79

R50

C47

C20

R322

R321

R320

Q2

IC405

+

E10

R120

R167

R166

R32

+

E1

R12

+

LED3

R412

R413

R414

R415

Rdi

Ripm

R13

CN24

R72

R8

R87

R74

J3

IC17

+

E24

D2

R124

C2

J2

J1

C77

AC AC

+

-

BR1

C13

D3

R7

RY3

RY4

RY2

CN5

R23

R24

R25

R26

R27

C74

C75

RY1

+

E14

C9

C17

C18

C19

C23

C24

C26

C32

C33

C35

C36

C37

C39

C43

C48

C49

C52

C65C67

C78

C87

C89

C90

C92

C147

C153

C25

CN9

CN23

CN39

+

E17

+

E23

+

E28

IC8

24LC08

IC12

24LC08

IC14

+

LED2

OSC1

R5

R30

R31

R40

R41

R42

R48

R49

R62

R64

R65 R66

R70

R73

R76

R77

R86

R92

R97

R161

R162

R163

R164

R165

R176

R177

R419

X1

C58

+

+

E405

IC404

R45

Q1

C15

C22

R21

R22

R28

R29

R33

+

E22

R3

R4

R121

C5

+

E6

R10

C28

C4

CN38

IC10

C79

C80

D7

C6

R148

R63

C506

R507

R508

+

E11

R106

C73

IC21

PC817

IC31

PC817

R175

R178

C409

IC402

C403

IC11

+

E402

D401

C401

R403

C411

C40

C50

D403

R401

R405

R406

R404

+

E404

D402

D404

C408

C402

+

E403

R407

R408

C404

C110

+

E409

+

E401

R402

C405

10

9

7

6

5

4

3

1

T401

C406

C407

D13

D14

+

E406

+

E407

+

E408

+

E502

+

E503

+

E504

+

DZ503

CN25

R6

R9

CN60

IC406

IC407

C7

D1

R1

R137

IC2

PC851

IC1
PC817

R2

R126

R125

R123
R122

R119

R118
R117

R15

R14

C99

C98

C97

C96
C95

C94

C93

C66

D20

R17

CN17

CN10

CN1

C41

R38

C45

C44

R136

R135

R134

R104

D12

D10

C54

+

D8

D9

R57

R20

C242

C243C244

R89

E2

R67

C84

C10

C11

IC4

C12

C38

R34

R47

R88

IC32

R39

R35

R36

R19

+

DZ6

R37

C46

C51

C53

CN19

+

DZ2

+

E27

IC3

PC817

IC5

PC817

Q8

R43

R44

R85

R91

R93

R95
R96

R99

D15

R51

+

E410

+

E8

C60

C61

E302

E303

E304

C62

VN1

VP1

U

P

VUB

U+

W

V+

V

W+

U-

VVB

VWB

FO
W-

V-

NV

NW

NU

VNC
CIN

IPM1

+

DZ304

+

DZ303

+

DZ302

C314

C316

C318

C30

C34

C31

ZR3

ZR4

C82

L1

R11

R140

CN27

E301

R168

IGBT1

connect to the DR module

connect to earth

fuse 250V 30A

connect to reactance

290-330VDC standby
210-300VDC running

power supply 208-230V AC connect to the terminal

connect to 4-way val ve
when 4-way is on, output 208-230V AC

AC FAN mototr

connect to compressor heater
when heater is on, output 208-230V AC

1 low speed
2 hign speed
3 ground

external drive motor
connect to DC motor
0V AC standby
10~200V AC’ running

U
V

W

connect to electric expansion valve

6 5 4 3 2 1

+12VDC

+12VDC
+12V DC pulse wave between( +4)-GND
+12V DC pulse wave between( +3)-GND
+12V DC pulse wave between( +2)-GND

+12V DC pulse wave between( +1)-GND

EEPROM Programmer Port

reserve

test port

Connect to PC
communication

V

U

W

connect to PC communication

test port

LED2 （red）&LED3（green）: status light
combination LED2 and LED3 show errors

（refer to the attechment Word ）

LED: status light（yellow）
slow flicker：standby（0.5Hz）
quick flicker：error （2Hz）
continuous light: running

internal drive motor

6 5 4 3 1

rotate speed feedback signal

0-15V square signal

drive power voltage: +15VDC

DC negative pole: GND

DC positive pole P: 315VDC

exhaust temp. sensor

pipe temp.sensor& room temp. sensor

TP T4 T3

7 6 5 4 3 2 1

RT

+5V DC

RT

RT

+5V DC

+5V DC

CN5/CN4 connect to chassis heater

when heater is on, output 208-230V AC

connect to DC motor

0V AC standby

10~200V AC’ running

bridge

IGBT

fast recovery diode
(FRD)

IPM for compressor

IPM for DC FAN

reserve

P

N

9.2 Outdoor unit error display

For KSIH009-H225-O, KSIH012-H222-O, KSIH018-H220-O

After power on, LED3(Green color) and LED2(Red color) will be flash if the unit has some

problems.

O（light） X（off） ☆（2.5Hz flash）

26

N

L

SHOW/ SW

EARTH

[1.4]2014.06.26

EU-KFR105W/ BP3T5N1-350S. D.13.WP1-1

L-OUT

N-OUT

CONNECT TO INVERTER driver

HI GHLOW

T2B- E

T2B- D

T2B- C

T2B- BT2B-A

TP

T4

T3

S- E

S- D

S- C

S- B

S- A

FAN_OUT

FAN_IN

AB

C

D

E

202302141206

CN19

CN10

N

CN9

S

CN44

HEAT2

CN43

FAN

CN42 C

CN41 C

CN40

HEAT1

CN34

CN33

CN30

CN29

CN28

CN27

CN26

CN22 4-WAY

CN20

CN18

CN17

CN16

CN14

CompTop

CN12

CN11

CN8

CN6

CN5

CN4

N

CN3

N

CN2

N-I N

CN1

L-I N

CN23

CN7

CN13

P-1

CN35

N

CN37

FAN- L

CN36

FAN-H

CN21

Electric Expansion
Value B

Electric Expansion
Value E

Electric Expansion
Value D

Electric Expansion
Value C

Electric Expansion
Value A

485

communication

testPort
connect to detector

external drive DC fan
motor input terminal

external drive DC fan
motor ouput terminal

current loop
communication A

current loop
communication B

current loop
communication C

current loop
communication D

current loop
communication E

digital display

Fuse
T30A/250V

connect to high and low
pressure sensor

connect to
trmp. sensor

Fuse 5A/250V

connect to earth

CN23 reserve

digital display button

test report
connect to detector

CN43-5,CN43-1/CN41,CN42
AC fan motor capacitor
connector

CN43-4/CN37 CONNECT TO
AC FAN MOTOR(LOW SPEED)

CN43-3/CN36
AC fan motor low speed
connector
CN43-2/CN35
AV fan motor N phase

current loop
communication C

Signal wire

24VDC Pulse wave

connect to the terminal

connect to the terminal

208-230V AC

power supply

room temp sensor

pipe temp sensor

(3.3V)

(3.3V)

high pressure sensor

low pressure sensor

Connect to the Indoor evap.pipe

out temp. sensor

T2B-A、T2B-B、T2B-C、T2B-D、T2B-E

+12V DC pulse wave between (+1)-GND

+12V DC pulse wave between (+2)-GND

+12V DC pulse wave between (+3)-GND

+12V DC pulse wave between (+4)-GND

+12V DC

+12V DC

6 5 4 3 2 1

when 4-way is ON, output 208-230VAC

connect to the 4-WAY

when heater is ON, output 208-230V AC

connect to compressor heater

CN44 L
CN10 N

CN40 L
CN4 N

CN22 L
CN3 N

connect to exhaust
temp. sensor

connect to the terminal

208-230V AC

external drive DC fan
motor connector

T3

T4

electric
heater1

electric

heater 2

For KSIH024-H220-O

27

202302141237

PFC- L2

[ 1. 6]2014.10. 16

EU- KFR105W/ BP2T3N1- 350(767). D.13. MP2-1

PFC-L1

EARTH

+

CN55

TO-MAIN

W

V

U

I PM2

I PM1

I C1424C08

CN54

L-I N2

N-I N2

OUTFAN( DC)

I C1

CN53

power supply

connect to t he t er mi nal

208-230V AC

CN54

CN51CN52

PFC
inductance
terminal

CN58

EATTH

­+

210-300VDC ( Runni ng)

CAPACI TOR Vol t age
290-330VDC ( st andby)

CN55

TO MAIN

CN19

connect to DC fan motor

U

V

W

10-200VAC (runni ng)

0VAC (st andby)

connect to t he compressor

U

V

W

10-200VAC (runni ng)

0VAC (st andby)

CN57
Debug

IPM board

28

Error Code

E0/F4

Malfunction decision
conditions

Indoor or outdoor PCB main chip does not receive feedback from
EEPROM chip.

Supposed causes

● Installation mistake

● PCB faulty

Yes

Replace the indoor/outdoor

main PCB.

Power off, then restart the

unit 2 minutes later.

Indoor PCB

Outdoor PCB

Note: The two photos above are only for reference, it’s may be not same totally with the ones on your side.

9.3 Diagnosis and Solution

9.3.1 EEPROM parameter error diagnosis and solution(E0/F4)

Trouble shooting:

EEPROM: a read-only memory whose contents can be erased and reprogrammed using a pulsed voltage. For the
location of EEPROM chip, please refer to the below photos.

29

Error Code

E1

Malfunction decision
conditions

Indoor unit does not receive the feedback from outdoor unit during 110
seconds and this condition happens four times continuously.

Supposed causes

● Wiring mistake

● Indoor or outdoor PCB faulty

Measure Vs. Is the voltage moving

alternately between -25V to 25V?

Measure Vs. Is the voltage moving

alternately between -25V to 25V?

Yes

Power off, then restart the unit 2 minutes later.

Is the error extinguished?

Power off, then restart the unit 2 minutes later.

Is the error extinguished?

No

Replace the outdoor main PCB.

Power on. Is the error

extinguished?

Replace the outdoor main PCB.

Power on. Is the error

extinguished?

Check the outdoor wiring connection。

Is the wiring correctly?

Check the outdoor wiring connection。

Is the wiring correctly?

Replace the indoor main PCB.

Power on. Is the error

extinguished?

Replace the indoor main PCB.

Power on. Is the error

extinguished?

Yes

Replace the outdoor main PCB.

Replace the outdoor main PCB.

No

Replace the indoor main PCB.

Replace the indoor main PCB.

No

Check the indoor wiring connection。

Is the wiring correctly?

Check the indoor wiring connection。

Is the wiring correctly?

Yes

No

Check whether reactor
is normal?

Check whether reactor
is normal?

Yes

Replace the reactor

Replace the reactor No

9.3.2 Indoor / outdoor unit’s communication diagnosis and solution(E1)

Trouble shooting:

30

Remark:

Use a multimeter to test the DC voltage
between 2 port and 3 port of outdoor
unit. The red pin of multimeter connects
with 2 port while the black pin is for 3
port.

When AC is normal running, the voltage
will move alternately between -25V to
25V.

If the outdoor unit has malfunction, the
voltage will move alternately with
positive value.

While if the indoor unit has malfunction,
the voltage will be a certain value.

Remark:

Use a multimeter to test the resistance
of the reactor which does not connect
with capacitor.
The normal value should be around
zero ohm. Otherwise, the reactor must
have malfunction.

31

Error Code

E2

Malfunction decision
conditions

When PCB does not receive zero crossing signal feedback for 4
minutes or the zero-crossing signal time interval is abnormal.

Supposed causes

● Connection mistake

● PCB faulty

Check if the connections and

power supply is normal?

Correct the connections. Turn on the
unit when the power supply is good.

No

Yes

Indoor main PCB is

defective. Replace indoor

main PCB.

9.3.3 Zero crossing detection error diagnosis and solution (E2)

Trouble shooting:

32

Error Code

E3/F5

Malfunction decision
conditions

When indoor fan speed keeps too low (300RPM) for certain time, the
unit will stop and the LED will display the failure.

Supposed causes

● Wiring mistake

● Fan assembly faulty

● Fan motor faulty

● PCB faulty

Power off, then restart the

unit 2 minutes later

Shut off the power supply,
Rotate the fan by hand.

The unit operates normally.

Find out the cause and have

it solved

Check the wiring of fan

motor

No

Yes

No

Correct the connections.

No

NoReplace the fan motor

Yes

Yes

Measure the voltage for the

fan motor from the main

PCB refer to the

Appendix 1

Yes

Replace the main PCBNo

9.3.4 Fan speed has been out of control diagnosis and solution(E3)

Trouble shooting:

33

NO.

Color

Signal

Voltage

1

Red

Vs/Vm

280V~380V

2

---

---

---

3

Black

GND

0V

4

White

Vcc

14-17.5V

5

Yellow

Vsp

0~5.6V

6

Blue

FG

14-17.5V

NO.

Color

Signal

Voltage

1

Red

Vs/Vm

140V~190V

2

---

---

---

3

Black

GND

0V

4

White

Vcc

14-17.5V

5

Yellow

Vsp

0~5.6V

6

Blue

FG

14-17.5V

Index 1:
1: Indoor or Outdoor DC Fan Motor (control chip is in fan motor)

Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor

connector. If the value of the voltage is not in the range showing in below table, the PCB must has
problems and need to be replaced.

DC motor voltage input and output (voltage: 220-240V~)

DC motor voltage input and output(voltage :115V~)

2. Outdoor DC Fan Motor (control chip is in outdoor PCB)
Power on, and check if the fan can run normally, if the fan can run normally, the PCB must have problems

and need to be replaced, If the fan can’t run normally, measure the resistance of each two pins. If the

resistance is not equal to each other, the fan motor must have problems and need to be replaced,
otherwise the PCB must have problems and need to be replaced.

3. Indoor AC Fan Motor

Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure

the voltage of pin1 and pin2. If the value of the voltage is less than 100V (208~240V power supply) or
50V (115V power supply), the PCB must have problems and need to be replaced.

34

Error Code

E4/E5/F1/F2/F3

Malfunction decision
conditions

If the sampling voltage is lower than 0.06V or higher than 4.94V, the
LED will display the failure.

Supposed causes

● Wiring mistake

● Sensor faulty

Check the connection

between temperature

sensor and PCB.

Correct the connectionNo

Yes

Replace indoor or outdoor

main PCB

Measure the resistance

value of the sensor

Repalce the sensorNo

Yes

9.3.5 Open circuit or short circuit of temperature sensor diagnosis and solution (E5)

Trouble shooting:

35

Error Code

EC

Malfunction decision
conditions

Define the evaporator coil temp. T2 of the compressor just starts
running as Tcool.
In the beginning 5 minutes after the compressor starts up, if T2 ＜
Tcool－2°C(Tcool－35.6°F) does not keep continuous 4 seconds

and this situation happens 3 times, the display area will show “EC”

and AC will turn off.

Supposed causes

● T2 sensor faulty

● Indoor PCB faulty

● System problems, such as leakage or blocking.

Is there cool air blowing
out from indoor air outlet?

Yes

Yes

Check if T2 sensor is well

fixed. Correct the installation

or replace T2 sensor. Does
the problem remain again?

No

Is there any leakage? Especially
the connection parts, such as the
gas valve and the liquid valve.

No

Shut off the power supply and
turn it on 2 minutes later. Is it
still displaying the error code?

Replace indoor PCB.

Yes

Repair the leakage and

recharge the refrigerant.

Yes

Clear the blocking.

Yes

Is there any block i n g ? (Such as the
capillary or the welded points of the pipes.)

9.3.6 Refrigerant Leakage Detection diagnosis and solution (EC)

Trouble shooting:

36

Error Code

F0

Malfunction decision
conditions

An abnormal current rise is detected by checking the specified
current detection circuit.

Supposed causes

● Power supply problems.

● System blockage

● PCB faulty

● Wiring mistake

● Compressor malfunction

Check the power supply. Is it

normal?

Check the connections and
wires .Is it well connection?

Stop the unit. Check the power

supply

No

Yes

No

Correct the connections or

replace the wires.

Yes

Replace the outdoor main PCB

Yes

Check the reactor .Is it

normal?

No

Replace the reactor

Is there any blocking?

No

Yes Clear the blockage

Check the compressor

resistance values refer to the

[Compressor checking]. Is it

normal?

Yes

No Replace the compressor

9.3.6 Overload current protection diagnosis and solution(F0)

Trouble shooting:

37

Error Code

P0

Malfunction decision
conditions

When the voltage signal that IPM send to compressor drive chip is
abnormal, the display LED will show “P0” and AC will turn off.

Supposed causes

● Wiring mistake

● IPM malfunction

● Outdoor fan assembly faulty

● Compressor malfunction

● Outdoor PCB faulty

Check if the wiring between main
PCB and compressor . If the wires
and connectors are broken?

Correct the connection or replace

the wires and connectors.

Yes

No

IPM continuity check. Check if the
IPM terminal resistance values are
uniform.

Replace the IPM board or replace the

main PCB if the IPM board and main

PCB are integrated together.

No

Check if the outdoor fan runs

properly or the outdoor unit

ventilation is good.

Yes

No

Please refer to the solution of 【Fan Speed Has Been

Out Of Control】malfunction

Yes

Check if the compressor resistance

values are uniform .

No Replace the compressor.

Yes

Replace the outdoor main PCB if the

main PCB and IPM are separate.

9.3.7 IPM malfunction or IGBT over-strong current protection diagnosis and solution (P0)

Trouble shooting:
For 9K~18K:

38

P-U

P-V

Note: The photos below are only for reference, it’s may be not same totally with the ones on your side.

For example:

39

P-W

N-U

40

N-V

N-W

41

Yes

Check whether the power voltage

is normal.

Check whether the power voltage

is normal.

Measure whether outdoor terminal

voltage is normal？

Measure whether outdoor terminal

voltage is normal？

Restart the unit when the power supply

gets normal

Restart the unit when the power supply

gets normal

No

Yes

No

Reconnect it well

Reconnect it well

Yes

Measure whether the voltage
between L and N is normal？

Measure whether the voltage
between L and N is normal？

Yes

Measure whether input voltage of

bridge rectifier is normal？

Measure whether input voltage of

bridge rectifier is normal？

No

No

Check the wiring of

power wires well or

correctly

Check the wiring of
power wires well or

correctly

Reconnect it well

Reconnect it well

Check the wiring of L

and N well or correctly

Check the wiring of L

and N well or correctly

Reconnect it well

Reconnect it well

Check the wiring of

bridge rectifier well or

correctly

Check the wiring of

bridge rectifier well or

correctly

No

Yes

Replace the PFC module(If has)

Replace the PFC module(If has)

No

Measure whether the voltage

between P and N is normal

refer to the Appendix 4？

Measure whether the voltage

between P and N is normal

refer to the Appendix 4？

Replace the bridge rectifier

Replace the bridge rectifierNo

Check whether bridge

rectifier is normal

Check whether bridge

rectifier is normal

Check the wiring of reactor

or inductance

Check the wiring of reactor

or inductance

Reconnect the wiring

Reconnect the wiring No

Check whether reactor or

inductance is normal

Check whether reactor or

inductance is normal

Yes

Replace reactor or

inductance

Replace reactor or

inductance

No

Check whether the connecting

wire between main board and the

IPM board is connected tightly

Check whether the connecting

wire between main board and the

IPM board is connected tightly

Reconnect it well

Reconnect it well

No

Check if the outdoor unit

ventilation is good

Check if the outdoor unit

ventilation is good

Yes

Make the outdoor unit ventilate well

Make the outdoor unit ventilate well

Check whether the refrigerant system is ok

Check whether the refrigerant system is ok

No

Check if the outdoor fan runs

properly

Check if the outdoor fan runs

properly

please refer to the solution of [fan speed

has been out of control malfunction] .

Find out the cause and have it solved.

please refer to the solution of [fan speed

has been out of control malfunction] .

Find out the cause and have it solved.

No

Yes

No

Yes

Yes

Check the compress is

normal

Check the compress is

normal

Yes

Replace the compressor

Replace the compressorNo

Replace IPM board

Replace IPM board

Replace the outdoor main PCB

Replace the outdoor main PCB

No

Check whether the connecting

wire of the compressor is

connected correctly or tightly

Check whether the connecting

wire of the compressor is

connected correctly or tightly

Reconnect it well

Reconnect it well

No

Yes

Yes

For 24K:

At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of them is 0 or
close to 0, the IPM is defective. Otherwise, please follow the procedure below:

42

Error Code

P1

Malfunction decision
conditions

An abnormal voltage rise or drop is detected by checking the
specified voltage detection circuit.

Supposed causes

● Power supply problems.

● System leakage or block

● PCB faulty

Check the power supply

Check the connections and
wires

Stop the unit

No

Yes

No

Correct the connections or

replace the wires.

Yes

Replace the reactor

Yes

No

Replace the IPM board

Check the voltage between P

and N

Check the reactor

Yes

No

Replace outdoor main PCB

Remark:
Measure the DC voltage
between P and N port. The
normal value should be
around 310V.

P

N

9.3.8 Over voltage or too low voltage protection diagnosis and solution (P1)

Trouble shooting:

43

Error Code

P2

Malfunction decision
conditions

If the sampling voltage is not 5V, the LED will display the failure.
Supposed causes

● PCB faulty

Yes

Tighten the screws and apply

silicon grease.

Tighten the screws and apply

silicon grease.

Replace the outdoor control PCB.

Replace the outdoor control PCB.

No

Check if the fastening screws

on the PCB and IPM radiator

are fixed tightly.

Check if the fastening screws

on the PCB and IPM radiator

are fixed tightly.

9.3.9 High temperature protection of IPM module diagnosis and solution (P2)

Trouble shooting:

44

Error Code

P4

Malfunction decision
conditions

An abnormal inverter compressor drive is detected by a special
detection circuit, including communication signal detection, voltage
detection, compressor rotation speed signal detection and so on.

Supposed causes

● Wiring mistake

● IPM malfunction

● Outdoor fan assembly faulty

● Compressor malfunction

● Outdoor PCB faulty

Check if the wiring between main
PCB and compressor connected
well?

Correct the connection or

replace the wires and

connectors.

No

Check if the IPM installed correctly.

Correct the installation,

tighten the screws and

apply silicon grease.

No

IPM continuity check. Check if the
IPM terminal resistance values are
uniform.

Yes

Replace the IPM board or replace

the main PCB if the IPM board and

main PCB are integrated together.

No

Check if the outdoor fan runs

properly or the outdoor unit

ventilation is good.

Yes

No

Please refer to the solution of 【Fan

Speed Has Been Out Of Control】

malfunction

Yes

Check if the compressor resistance

values are uniform .

No Replace the compressor.

Yes

Replace the outdoor main PCB if the

main PCB and IPM are separate.

Check the reactor or

Inductance .Is it normal?

No

Replace the reactor or

Inductance

Yes

Yes

9.3.10 Inverter compressor drive error diagnosis and solution (P4)

Trouble shooting:
For 9K~18K:

45

Digital tester

Normal resistance value

Digital tester

Normal resistance value

(+) Red

(-) Black

∞

(Several MΩ)

(+) Red

(-) Black

∞

(Several MΩ)

P

N

U N U V V W W

(+) Red

IPM continuity check

Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the
IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N.

46

Yes

Check whether the power voltage

is normal.

Check whether the power voltage

is normal.

Measure whether outdoor terminal

voltage is normal？

Measure whether outdoor terminal

voltage is normal？

Restart the unit when the power supply

gets normal

Restart the unit when the power supply

gets normal

No

Yes

No

Reconnect it well

Reconnect it well

Yes

Measure whether the voltage
between L and N is normal？

Measure whether the voltage
between L and N is normal？

Yes

Measure whether input voltage of

bridge rectifier is normal？

Measure whether input voltage of

bridge rectifier is normal？

No

No

Check the wiring of

power wires well or

correctly

Check the wiring of
power wires well or

correctly

Reconnect it well

Reconnect it well

Check the wiring of L

and N well or correctly

Check the wiring of L

and N well or correctly

Reconnect it well

Reconnect it well

Check the wiring of

bridge rectifier well or

correctly

Check the wiring of

bridge rectifier well or

correctly

No

Yes

Replace the PFC module(If has)

Replace the PFC module(If has)

No

Measure whether the voltage

between P and N is normal

refer to the Appendix 4？

Measure whether the voltage

between P and N is normal

refer to the Appendix 4？

Replace the bridge rectifier

Replace the bridge rectifierNo

Check whether bridge

rectifier is normal

Check whether bridge

rectifier is normal

Check the wiring of reactor

or inductance

Check the wiring of reactor

or inductance

Reconnect the wiring

Reconnect the wiring No

Check whether reactor or

inductance is normal

Check whether reactor or

inductance is normal

Yes

Replace reactor or

inductance

Replace reactor or

inductance

No

Check whether the connecting

wire between main board and the

IPM board is connected tightly

Check whether the connecting

wire between main board and the

IPM board is connected tightly

Reconnect it well

Reconnect it well

No

Check if the outdoor unit

ventilation is good

Check if the outdoor unit

ventilation is good

Yes

Make the outdoor unit ventilate well

Make the outdoor unit ventilate well

Check whether the refrigerant system is ok

Check whether the refrigerant system is ok

No

Check if the outdoor fan runs

properly

Check if the outdoor fan runs

properly

please refer to the solution of [fan speed

has been out of control malfunction] .

Find out the cause and have it solved.

please refer to the solution of [fan speed

has been out of control malfunction] .

Find out the cause and have it solved.

No

Yes

No

Yes

Yes

Check the compress is

normal

Check the compress is

normal

Yes

Replace the compressor

Replace the compressorNo

Replace IPM board

Replace IPM board

Replace the outdoor main PCB

Replace the outdoor main PCB

No

Check whether the connecting

wire of the compressor is

connected correctly or tightly

Check whether the connecting

wire of the compressor is

connected correctly or tightly

Reconnect it well

Reconnect it well

No

Yes

Yes

For 24K:

At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of
them is 0 or close to 0, the IPM is defective. Otherwise, please follow the procedure below:

47

Error Code

P6

Malfunction decision
conditions

When the pressure of system reaches a certain value, the low­pressure protector will switch off. After the pressure resume to
normal, the protection code will disappear.

Supposed causes

● Wiring mistake

● Pressure protector faulty

● Fan motor faulty

● PCB faulty

● System problems.

Whether the wiring

between the low pressure
protector and main control
board is connected well or

correctly

Whether the wiring

between the low pressure

protector and main control
board is connected well or

correctly

Method: Disconnect the

plug. Measure the

resistance of the low

pressure protector. If the

protector is normal the value

is o

Method: Disconnect the

plug. Measure the

resistance of the low

pressure protector. If the

protector is normal the value

is o

Yes

Yes

Connect it well

Connect it well

Replace outdoor main board

Replace outdoor main board

No

Replace low pressure protector

Replace low pressure protector

No

Whether the low

pressure protector

is broken

Whether the low

pressure protector

is broken

Check whether the outdoor

ambient temperature is too

low

Check whether the outdoor
ambient temperature is too

low

No

Stop the unit

Stop the unit

Yes

Open fully valve core of high

pressure valve

Open fully valve core of high

pressure valve

No

Check whether valve core of

high pressure valve is

opened

Check whether valve core of

high pressure valve is

opened

Check if the indoor fan runs

properly in cooling mode

Check if the indoor fan runs

properly in cooling mode

please refer to the solution of [fan

speed has been out of control

malfunction]. Find out the cause and

have it solved.

please refer to the solution of [fan

speed has been out of control

malfunction]. Find out the cause and

have it solved.

No

Yes

Yes

No

Check whether the

refrigerant system is ok

Check whether the

refrigerant system is ok

Refrigerant is not enough add the

refrigerant

Refrigerant is not enough add the

refrigerant

No

9.3.11 Low pressure protection diagnosis and solution(P6)

Trouble shooting:

48

Main parts check

1. Temperature sensor checking

Disconnect the temperature sensor from PCB, measure the resistance value with a tester.

Temperature sensors.
Room temp.(T1) sensor,
Indoor coil temp.(T2) sensor,
Outdoor coil temp.(T3) sensor,
Outdoor ambient temp.(T4) sensor,
Compressor discharge temp.(TP) sensor.
Measure the resistance value of each winding by using the multi-meter.

49

°C

°F

K Ohm

°C

°F

K Ohm

°C

°F

K Ohm

°C

°F

K Ohm

-20

-4

115.266

20

68

12.6431

60

140

2.35774

100

212

0.62973

-19

-2

108.146

21

70

12.0561

61

142

2.27249

101

214

0.61148

-18 0 101.517

22

72

11.5

62

144

2.19073

102

216

0.59386

-17 1 96.3423

23

73

10.9731

63

145

2.11241

103

217

0.57683

-16 3 89.5865

24

75

10.4736

64

147

2.03732

104

219

0.56038

-15 5 84.219

25

77

10

65

149

1.96532

105

221

0.54448

-14 7 79.311

26

79

9.55074

66

151

1.89627

106

223

0.52912

-13 9 74.536

27

81

9.12445

67

153

1.83003

107

225

0.51426

-12

10

70.1698

28

82

8.71983

68

154

1.76647

108

226

0.49989

-11

12

66.0898

29

84

8.33566

69

156

1.70547

109

228

0.486

-10

14

62.2756

30

86

7.97078

70

158

1.64691

110

230

0.47256

-9

16

58.7079

31

88

7.62411

71

160

1.59068

111

232

0.45957

-8

18

56.3694

32

90

7.29464

72

162

1.53668

112

234

0.44699

-7

19

52.2438

33

91

6.98142

73

163

1.48481

113

235

0.43482

-6

21

49.3161

34

93

6.68355

74

165

1.43498

114

237

0.42304

-5

23

46.5725

35

95

6.40021

75

167

1.38703

115

239

0.41164

-4

25

44

36

97

6.13059

76

169

1.34105

116

241

0.4006

-3

27

41.5878

37

99

5.87359

77

171

1.29078

117

243

0.38991

-2

28

39.8239

38

100

5.62961

78

172

1.25423

118

244

0.37956

-1

30

37.1988

39

102

5.39689

79

174

1.2133

119

246

0.36954

0

32

35.2024

40

104

5.17519

80

176

1.17393

120

248

0.35982

1

34

33.3269

41

106

4.96392

81

178

1.13604

121

250

0.35042

2

36

31.5635

42

108

4.76253

82

180

1.09958

122

252

0.3413

3

37

29.9058

43

109

4.5705

83

181

1.06448

123

253

0.33246

4

39

28.3459

44

111

4.38736

84

183

1.03069

124

255

0.3239

5

41

26.8778

45

113

4.21263

85

185

0.99815

125

257

0.31559

6

43

25.4954

46

115

4.04589

86

187

0.96681

126

259

0.30754

7

45

24.1932

47

117

3.88673

87

189

0.93662

127

261

0.29974

8

46

22.5662

48

118

3.73476

88

190

0.90753

128

262

0.29216

9

48

21.8094

49

120

3.58962

89

192

0.8795

129

264

0.28482

10

50

20.7184

50

122

3.45097

90

194

0.85248

130

266

0.2777

11

52

19.6891

51

124

3.31847

91

196

0.82643

131

268

0.27078

12

54

18.7177

52

126

3.19183

92

198

0.80132

132

270

0.26408

13

55

17.8005

53

127

3.07075

93

199

0.77709

133

271

0.25757

14

57

16.9341

54

129

2.95896

94

201

0.75373

134

273

0.25125

15

59

16.1156

55

131

2.84421

95

203

0.73119

135

275

0.24512

16

61

15.3418

56

133

2.73823

96

205

0.70944

136

277

0.23916

17

63

14.6181

57

135

2.63682

97

207

0.68844

137

279

0.23338

18

64

13.918

58

136

2.53973

98

208

0.66818

138

280

0.22776

19

66

13.2631

59

138

2.44677

99

210

0.64862

139

282

0.22231

Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4 (°C--K)

50

°C

°F

K Ohm

°C

°F

K Ohm

°C

°F

K Ohm

°C

°F

K Ohm

-20

-4

542.7

20

68

68.66

60

140

13.59

100

212

3.702

-19

-2

511.9

21

70

65.62

61

142

13.11

101

214

3.595

-18

0

483

22

72

62.73

62

144

12.65

102

216

3.492

-17

1

455.9

23

73

59.98

63

145

12.21

103

217

3.392

-16

3

430.5

24

75

57.37

64

147

11.79

104

219

3.296

-15

5

406.7

25

77

54.89

65

149

11.38

105

221

3.203

-14

7

384.3

26

79

52.53

66

151

10.99

106

223

3.113

-13

9

363.3

27

81

50.28

67

153

10.61

107

225

3.025

-12

10

343.6

28

82

48.14

68

154

10.25

108

226

2.941

-11

12

325.1

29

84

46.11

69

156

9.902

109

228

2.86

-10

14

307.7

30

86

44.17

70

158

9.569

110

230

2.781

-9

16

291.3

31

88

42.33

71

160

9.248

111

232

2.704

-8

18

275.9

32

90

40.57

72

162

8.94

112

234

2.63

-7

19

261.4

33

91

38.89

73

163

8.643

113

235

2.559

-6

21

247.8

34

93

37.3

74

165

8.358

114

237

2.489

-5

23

234.9

35

95

35.78

75

167

8.084

115

239

2.422

-4

25

222.8

36

97

34.32

76

169

7.82

116

241

2.357

-3

27

211.4

37

99

32.94

77

171

7.566

117

243

2.294

-2

28

200.7

38

100

31.62

78

172

7.321

118

244

2.233

-1

30

190.5

39

102

30.36

79

174

7.086

119

246

2.174

0

32

180.9

40

104

29.15

80

176

6.859

120

248

2.117

1

34

171.9

41

106

28

81

178

6.641

121

250

2.061

2

36

163.3

42

108

26.9

82

180

6.43

122

252

2.007

3

37

155.2

43

109

25.86

83

181

6.228

123

253

1.955

4

39

147.6

44

111

24.85

84

183

6.033

124

255

1.905

5

41

140.4

45

113

23.89

85

185

5.844

125

257

1.856

6

43

133.5

46

115

22.89

86

187

5.663

126

259

1.808

7

45

127.1

47

117

22.1

87

189

5.488

127

261

1.762

8

46

121

48

118

21.26

88

190

5.32

128

262

1.717

9

48

115.2

49

120

20.46

89

192

5.157

129

264

1.674

10

50

109.8

50

122

19.69

90

194

5

130

266

1.632

11

52

104.6

51

124

18.96

91

196

4.849

12

54

99.69

52

126

18.26

92

198

4.703

13

55

95.05

53

127

17.58

93

199

4.562

14

57

90.66

54

129

16.94

94

201

4.426

15

59

86.49

55

131

16.32

95

203

4.294

16

61

82.54

56

133

15.73

96

205

4.167

17

63

78.79

57

135

15.16

97

207

4.045

18

64

75.24

58

136

14.62

98

208

3.927

19

66

71.86

59

138

14.09

99

210

3.812

Appendix 2 Temperature Sensor Resistance Value Table for TP (°C --K)

51

°C

°F

°C

°F

°C

°F

°C

°F

°C

°F

-5

23

21

69.8

51

123.8

82

179.6

113

235.4

-4

24.8

22

71.6

52

125.6

83

181.4

114

237.2

-3

26.6

23

73.4

53

127.4

84

183.2

115

239

-2

28.4

24

75.2

54

129.2

85

185

116

240.8

-1

30.2

25

77

55

131

86

186.8

117

242.6 0 32

25.5

77.9

56

132.8

87

188.6

118

244.4

0.5

32.9

26

78.8

57

134.6

88

190.4

119

246.2 1 33.8

27

80.6

58

136.4

89

192.2

120

248

1.5

34.7

28

82.4

59

138.2

90

194

121

249.8 2 35.6

29

84.2

60

140

91

195.8

122

251.6

2.5

36.5

30

86

61

141.8

92

197.6

123

253.4

3

37.4

31

87.8

62

143.6

93

199.4

124

255.2

3.5

38.3

32

89.6

63

145.4

94

201.2

125

257

4

39.2

33

91.4

64

147.2

95

203

126

258.8

4.5

40.1

34

93.2

65

149

96

204.8

127

260.6

5

41

35

95

66

150.8

97

206.6

128

262.4

6

42.8

36

96.8

67

152.6

98

208.4

129

264.2 7 44.6

37

98.6

68

154.4

99

210.2

130

266 8 46.4

38

100.4

69

156.2

100

212

131

267.8 9 48.2

39

102.2

70

158

101

213.8

132

269.6

10

50

40

104

71

159.8

102

215.6

133

271.4

11

51.8

41

105.8

72

161.6

103

217.4

134

273.2

12

53.6

42

107.6

73

163.4

104

219.2

135

275

13

55.4

43

109.4

74

165.2

105

221

136

276.8

14

57.2

44

111.2

75

167

106

222.8

137

278.6

15

59

45

113

76

168.8

107

224.6

138

280.4

16

60.8

46

114.8

77

170.6

108

226.4

139

282.2

17

62.6

47

116.6

78

172.4

109

228.2

140

284

18

64.4

48

118.4

79

174.2

110

230

141

285.8

19

66.2

49

120.2

80

176

111

231.8

142

287.6

20

68

50

122

81

177.8

112

233.6

143

289.4

Appendix 3:

52

Normal voltage of P and N

208-240V (1-phase, 3-phase)

380-420V (3-phase)

In standby

around 310VDC

around 530VDC

In operation

With passive

PFC module

With partial

active PFC

module

With fully

active PFC

module

/

>200VDC

>310VDC

>370VDC

>450VDC

Appendix 4

53

Position

Resistance Value

ASM98D32UFZ

ATM115D43UFZ2

ATM150D23UFZ

ATF235D22UMT

ATF250D22UMT

Blue –

Red

2.25Ω

(20°C

/68°F)

1.87Ω

(20°C

/68°F)

1.72Ω
(20°C
/68°F)

0.75Ω

(20°C

/68°F)

0.75Ω

(20°C

/68°F)

Blue -

Black

Red –

Blue

2.Compressor checking

Measure the resistance value of each winding by using the tester.

54

Digital tester

Normal resistance value

Digital tester

Normal resistance value

(+) Red

(-) Black

∞

(Several MΩ)

(+) Red

(-) Black

∞

(Several MΩ)

P

N

U N U V V W W

(+) Red

Position

Resistance Value

RPG13B

RPG50B(YKFG-50-4-1)

Black - Red

100.5Ω±8%
(20°C /68°F)
(Brand: Weiling)

100Ω±8%

(20°C /68°F)

(Brand: Dayang)

82.2Ω±8%

(20°C /68°F)

(Brand: Weiling)

85Ω±8%

(20°C /68°F)

(Brand: Dayang)

White - Black

64.5Ω±8%

(20°C /68°F)

(Brand: Weiling)

68.5Ω±8%

(20°C /68°F)

(Brand: Dayang)

72.3Ω±8%

(20°C /68°F)

(Brand: Weiling)

57.8Ω±8%

(20°C /68°F)

(Brand: Dayang)

3. IPM continuity check

Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the
IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N.

4: Indoor AC Fan Motor

Measure the resistance value of each winding by using the tester.

55

°F(°
C)

ODT

IDT

75

(23.89)

85

(29.44)

95

(35)

105

(40.56)

115

(46.11)

BAR

70/59

8.2

7.8

8.1

8.6

10.1

BAR

75/63

8.6

8.3

8.7

9.1

10.7

BAR

80/67

9.3

8.9

9.1

9.6

11.2

°F(°
C)

ODT

IDT

75

(23.89)

85

(29.44)

95

(35)

105

(40.56)

115

(46.11)

PSI

70/59

119

113

117

125

147

PSI

75/63

124

120

126

132

155

PSI

80/67

135

129

132

140

162

°F(°
C)

ODT

IDT

75

(23.89)

85

(29.44)

95

(35)

105

(40.56)

115

(46.11)

MPA

70/59

0.82

0.78

0.81

0.86

1.01

MPA

75/63

0.86

0.83

0.87

0.91

1.07

MPA

80/67

0.93

0.89

0.91

0.96

1.12

5: Pressure on Service Port

Cooling chart:

56

Heating Chart:

°F

(°C)

ODT

IDT

57/53

(13.89/11.67)

47/43

(8.33/6.11)

37/33

(2.78/0.56)

27/23

(-2.78/-5)

17/13

(-8.33/-10.56)

BAR

55

30.3

28.5

25.3

22.8

20.8

BAR

65

32.5

30.0

26.6

25.4

23.3

BAR

75

33.8

31.5

27.8

26.3

24.9

°F

(°C)

ODT

IDT

57/53

(13.89/11.67)

47/43

(8.33/6.11)

37/33

(2.78/0.56)

27/23 (-

2.78/-5)

17/13

(-8.33/-10.56)

PSI

55

439

413

367

330

302

PSI

65

471

435

386

368

339

PSI

75

489

457

403

381

362

°F

(°C)

ODT

IDT

57/53

(13.89/11.67)

47/43

(8.33/6.11)

37/33

(2.78/0.56)

27/23 (-

2.78/-5)

17/13

(-8.33/-10.56)

MPA

55

3.03

2.85

2.53

2.28

2.08

MPA

65

3.25

3.00

2.66

2.54

2.33

MPA

75

3.38

3.15

2.78

2.63

2.49

57

10 Disassembly Instructions

No.

Parts name

Procedures

Remarks

1

Front panel

How to remove the front
panel.

1) Pull the below side of
the panel and release the
clips. Then remove the
front panel.

2) Remove the filter

and

horizontal louver.

3) Remove the four
fixing screws.

4) Remove the cover
(one screw).

5) Lift the panel frame
and release the
connector of display
assembly connectors.
Then remove the panel
frame assembly.

Overview:

Connector for
display ass’y

Clip

One screw
fixing the cover

Clip

Panel

Filter

Four screws

Note: This part is for reference, the photos may have slight difference with your machine.

10.1 Indoor unit

58

2

Electrical
parts

How to remove the
electrical parts.

1) After remove the
front panel from
procedure 1, pull out the
room temp. sensor and
evaporator coil sensor.
Remove the grounding
screws.

2) Pull out the clip
toward the left side and
open the cover.

3) Remove the fixing
screw and open the
electrical box cover.
.

4) Pull out the
connectors of the swing
motor and fan motor.

5) Remove the fixing
screw and then remove
the electronic control box
and air outlet assembly.

Fixing screw

Swing motor

Fan motor connector

and swing motor

Clip for electronic
control box cover

Grounding screws

Evaporator coil
temp. sensor

Room temp.
sensor

59

3

Evaporator

How to remove the
evaporator.

1) After remove the front
panel assembly and
electrical parts following
procedure 1 and
procedure 2, remove the
pipe holder at the rear
side of the unit.

2) Remove the two
screws on the evaporator
at the base bearing side.

3) Remove two screws
on the evaporator at the
fixed plates and then lift
the evaporator assembly.

Two screws at the base bearing side

Two

screws at

the fixed
plates

60

4

Fan and
motor

How to remove the fan
and motor.

1) After remove the
evaporator assembly
following procedure 1,
procedure 2 and
procedure 3, remove the
three screws fixing the
cover

2) Remove the screw
fixing the motor and then
pull out the motor.

Three screws

One screw

61

10.2 Outdoor unit

No.

Part name

Procedures

Remarks

Panel plate

How to remove the panel
plate.

1) Stop operation of
the air conditioner and
turn “OFF” the power
breaker.

3) Remove the big

handle first, and then

remove the top panel (3
screws).

3) Remove the screws of
front panel (6 screws)

(4) Remove the screws of
the right-side panel (8
screws)

Screws of top panel (3 screws, 1 screw is under the big handler)

3 screws

of the big

handler

6 screws of front panel

KSIH009-H225-O, KSIH012-H222-O

○

2

○

4

○

3

62

2

Fan assembly

How to remove the fan
assembly.

1) After remove the

panel plate following

procedure 1, remove

the hex nut fixing the

fan and then remove

the fan.

2) Unfix the hooks and

then open the electronic
control box cover.

compressor

T3,T4,T5 sensor

Motor

Electronic expansion valve

4 way valve

○

1

○

2

63

3) Disconnect the

connector for fan motor

from the electronic control
board.

4) Remove the four fixing

screws of the fan motor.

Then remove the fan

motor.

3

Electrical
parts

How to remove the
electrical parts.

1) After finish work of

item 1 and item 2, remove

the connectors for the
compressor.

2) Pull out the two blue

wires connected with the
four-way valve.

4

○

○

3

○

1

2

○

64

3) Pull out connectors of

the condenser coil temp.

sensor(T3), outdoor

ambient temp. sensor

(T4) and discharge temp.
sensor (TP).

4) disconnect the

electronic expansion
valve wire

5) Remove the
grounding screw.

6) Remove the wires

(1,2,3) then remove the
electronic control box.

○

3

○

4

5

○ ○

6

65

4

Four-way
valve

How to remove the four­way valve.

1) Perform work of

Item 1,3.

2) Recover refrigerant

from the refrigerant
circuit.

3) Remove the screw of
the coil and then remove
the coil.

4) Detach the welded
parts of four-way valve
and pipe.

1) Then the four-way
valve assembly can be
removed

The picture of four-way valve may be different from
the one on your side.

○

5

Compressor

How to remove the
compressor.

1) After perform work of

Item 1,3. Recover

refrigerant from the
refrigerant circuit.

2) Remove the
discharge pipe and
suction pipe with a
burner.

3) Remove the hex nuts
and washers fixing the
compressor on bottom
plate.

4) Lift the compressor
from the base pan
assembly.

3

2

○

○

4

○

3

66

KSIH018-H220-O

No.

Part name

Procedures

Remarks

Panel plate

How to remove the panel
plate.

1) Stop operation of
the air conditioner and
turn “OFF” the power
breaker.

2) Remove the top panel
(3 screws).

3) Remove the screws of
front panel (9 screws)

4) Remove the screws of
the right-side panel (8
screws)

3 screws of top panel

9 screws of front panel

3 screws of

big handle

○

2

○

4

○

3

67

2

Fan assembly

How to remove the fan
assembly.

1) After remove the panel

plate following procedure

1, remove the hex nut

fixing the fan and then
remove the fan.

2) After remove the top
cover. Unfix the hooks and

then open the electronic
control box cover.

T3,T4,T5 sensor wire

Motor wire

Electronic expansion valve

Compressor wire
4 -way valve wire

Electric pipe heater and Crankcase electric heater

○

1

○

2

68

3) Disconnect the

connector for fan motor

from the electronic control

board.

4) Remove the four fixing
screws of the fan motor.

Then remove the fan
motor.

3

Electrical
parts

How to remove the
electrical parts.

1) After finish work of

item 1 and item 2, remove

the connectors for the
compressor and reactor.

4

○

○

3

○

1

69

2) Pull out the two blue

wires connected with the
four-way valve.

3) Pull out connectors of

the condenser coil temp.

sensor(T3), outdoor

ambient temp. sensor(T4)

and discharge temp.
sensor (TP).

4) disconnect the
electronic expansion valve
wire

○,

3

2

○

3

○

○

4

70

5) remove the electric
heaters.

6) Remove the
grounding screw.

7) Remove the

Wires (1,2,3 or L1, L2, S).
Then remove the
electronic control box.

⑥

○

5

○

7

71

4

Four-way
valve

How to remove the four­way valve.

1) Perform work of

Item 1, 3.

2) Recover refrigerant
from the refrigerant circuit.

3) Remove the screw of
the coil and then remove
the coil.

4) Detach the welded
parts of four-way valve
and pipe.

2) Then the four-way
valve assembly can be
removed

The picture of four-way valve may be different from
the one on your side.

5

Compressor

How to remove the
compressor.

1) After perform work of

Item 1, 3 recover

refrigerant from the
refrigerant circuit

2) Remove the
discharge pipe and
suction pipe with a burner.

3) Remove the hex nuts
and washers fixing the
compressor on bottom
plate.

4) Lift the compressor
from the base pan
assembly.

○

④

3

2

○

○

3

72

KSIH024-H220-O

No.

Part name

Procedures

Remarks

1

Panel plate

How to remove the panel
plate.

1) Stop operation of the

air conditioner and turn
“OFF” the power breaker.

2) Remove the big handle
first, then remove the top
cover (7 screws)

3) Remove the screws

of front panel (11

screws)

(4) Remove the screws of

the right-side panel (13
screws)

Screws of front panel(11 screws)

Screws of top panel(3screws,1screws is under the big handle)

4 screws of big handle

○

2

○

4

○

3

73

2

Fan assembly

How to remove the fan
assembly.

1) After remove the panel

plate following procedure
1

2) Remove the nut fixing

the fan and remove the
fan.

3) Unfix the hooks and

remove the screws, then

open the electronic control
box cover.

fan

Electronic control box

compressor

○

2

○

3

74

4) Disconnect the

connector for fan motor

from the electronic control
board.

5) Remove the four fixing
screws of the fan motor,

then remove the motor.

○,

5

T3,T4,T5,sensor

Pressure switch

Compressor
wire

Electronic expansion

4 way valve

Motor wire

4

○

○

5

75

3

Electrical
parts

How to remove the
electrical parts.

1) After finish work of

item 1 and item 2, remove

the connector for the
compressor

2) Pull out the two blue

wires connected with the
four-way valve.

3) Pull out connectors of

the, condenser coil temp.

sensor (T3), outdoor

ambient temp. sensor (T4)

and discharge temp.
sensor (TP).

○

1

○

2

○

3

76

4)Disconnect the pressure

switch connector.

5) Disconnect the
electronic expansion valve

wire from the control

board

6) Remove the ground
wires.

7) Remove the wires (1, 2,

3 or L1, L2, S). Then

remove the electronic
control box.

or!

○

5

○

6

○

7

77

4

Four-way
valve

How to remove the four­way valve.

1) Perform work of item
1,3.

2) Recover refrigerant
from the refrigerant circuit.

3) Remove the screw of
the coil and then remove
the coil.

4) Detach the welded
parts of four-way valve
and pipe.

5) Then the four-way valve
assembly can be removed

The picture of four-way valve may be different from
the one on your side.

5

Compressor

How to remove the
compressor.

1) After perform work of
item1, 3 recover
refrigerant from the
refrigerant circuit.

2) Remove the
discharge pipe and
suction pipe with a burner.

3) Remove the hex nuts
and washers fixing the
compressor on bottom
plate.

4) Lift the compressor
from the base pan
assembly.

③

○

3

2

○

○

4

The Klimaire logo is a registered Trademark of Klimaire Products inc.

Copyright 2018

Klimaire Products inc.

2190 NW 89 Place, Doral, FL 33172 - USA

Tel: [phone] Fax [phone]

www.klimaire.com [e-mail]

The design and specifications are subject to change without prior notice for product
improvement.Consult with the sales agency or manufacturer for details