Klimatair KFH28PV2, KRH28PV2 Service Manual

SERVICE

Manual

PACKAGED AIR CONDITIONER

INDOOR UNIT
KFH28PV2

OUTDOOR UNIT
KRH28PV2

CONTENTSAIR CONDITIONER

1 . P re c a u t i o n s

2 . P roduct Specifications

3 . Operating Instructions and

I n s t a l l a t i o n

4 . Disassembly and Reassembly

5 . Tro u b l e s h o o t i n g

6 . Exploded Views and Parts List

7 . Block Diagrams

8 . PCB Diagrams

9 . Wiring Diagrams

1 0 . Schematic Diagrams

1) Turn off the the power.
Be sure to turn off the power before attempting to repair the
unit such as the disassembly of the unit.

2) Be careful of electric shock
When checking the circuit with the power connected in
unavoidable circumstances, take special care not to touch the
live parts. There is a danger of electric shock.

3) Use of appropriate parts
Be sure to use the genuine parts of the relevant model when
it is necessary to replace parts. (Replace parts instead of
repairing with regard to the malfunctioning of electric contact
areas. Never attempt to modify the unit. It is extremely dan­gerous for the consumer to attempt to repair the unit on
his(her) own.)

4) Use of proper tools
Use appropriate tools for repair, and use measuring equip­ment after accurate calibration. Using worn tools may result
in problems, including poor contact and poor connection.

5) Avoid damage to electric wire or electric cord.
Check the electric cord or electric wire for any damage during
repair.
Be sure to replace it if damaged.

6) Avoid intermediate connection of the electric cord.
Never attempt to make an intermediate connection by cutting
the middle area of the electric cord or make a connection to
the power receptacle as it is very dangerous, causing prob­lems or fire.

7) Checking of insulation
Be sure to check the insulation resistance after completion of
the assembly work.
(Check whether the insulation resistance of the electric wire
and grounding terminal is over 30MΩ by using the insulation
resistance tester, and then connect the power source.)

8) Checking of grounding
Check the grounding condition, and perform repair if poorly
grounded.

9) Checking of installation condition
Check the installation condition of the unit, and perform
repair if there is any defective area.
If the unit remains in an unstable installing condition, install
it at a new site.

10) Be careful of children
As the repair of the unit involves a lot of dangerous elements,
do not allow children to approach nearby during repair work.

1-1

1. Precautions

Turn off the sub power switch separately installed.

No connection with the power receptacle

Upon completion of the repair, clean the air
conditioner and surrounding area, and
inform the customer of completion of the repair.

Cleaning

2-1

2. Product Specifications

2-1 Table

M o d e l

I t e m

U n i t Width x Height x Depth m m
P a c k e d Width x Height x Depth m m
U n i t Width x Height x Depth m m
P a c k e d Width x Height x Depth m m
P a c k e d Width x Height x Depth m m
U n i t k g
P a c k e d k g
U n i t k g
P a c k e d k g
P a c k e d k g

1. Cooling capacity/Heating Capacity B T U / h

2. Power consumption(Cooling/Heating) W

3. Current consuption(Cooling/Heating) A

5. Noise Indoor unit Tu r b o d B
( C o o l i n g / H i g h d B

H e a t i n g ) M e d i u m d B

L o w d B

Outdoor unit d B

1. Evaporator C o n s t ru c t i o n Row x Step

F i n
C a p i l l a ry tube

2. Blower motor No. of polarities

C a p a c i t o r
R P M Tu r b o

H i g h

M e d i u m

L o w

3. Blower Ty p e

4. Motor swing

5. Fuse V / A

1. Condenser C o n s t ru c t i o n Row x Step

F i n

2. Refrigerant volume R - 2 2 g

3. Compre s s o r M a k e r

M o d e l
Ty p e
C a p a c i t o r
O L P

4. Fan motor No. of polarities

C a p a c i t o r
R P M

5. Fan Ty p e

6. Service v/v High pre s s u re side

Low pre s s u re side

KFH28PV2

500 x 1835 x 330
574 x 1945 x 409

880 x 790 x 310

1023 x 851 x 413

640 x 130 x 640

42
49
67
75
12

25,800 / 29,800

2,700 / 2.900

12.5 / 13.5
50 / 48

48
45
43
59

3 x 26

WAVE 1.4

ø1.3 x L x 4

6P

450VAC 4.5µF

750
650
600

550
SIROCCO
220V/3W

250V 3.15A

2 x 30

WAVE 1.7

2,500

COPELAND

ZR34K3-PFJ

SCROLL

450VAC 50µF

-

6P

450VAC 4.0µF

840

PROPELLER

3/8 inch
5/8 inch

S i z e

We i g h t

Indoor unit

Outdoor unit

Outdoor unit

Indoor unit

P i p i n g

P i p i n g

E l e c t r i c

c h a r a c t e r i s t i c s

Indoor unit

Outdoor unit

2-2

2-2 Dimensions

Indoor Unit

Outdoor Unit

unit : mm

330

3-1

3-1-1 Control System Char t

3. Operating Instructions and Installation

3-1 Operating Instructions

Operation

Operation selector mode

Fan speed selector mode

A i rflow selector mode

Timer operation mode

Convenience function

Self-diagnosis function

Main switch operation

Remote control operation

Auto mode

Cool mode

Dry mode
Fan mode

Heat mode

Manual 3-step

Natural

Auto

Right and left turn
UP and Down Turn

ON time

OFF time

Turbo opertion

“E6”

“E5”

“E2”

“E1”

Q.timer

Mild operation

Auto, Cool, Dry, Fan, Heat operation
Turbo, Mild, Auto, Cool, Dry, Fan, Heat, Timer operation

Chaos output step fan motor control (Cooling:NATURAL, Heating:AUTO)
Indoor temperature control according to the set temperature.
Decide the dry cycle by the difference in room temperature and set temperature.
Operation of the indoor fan motor only.
Indoor temperature control according to the set temperature

High, Medium, Low
Automatic decision of High, Medium, and Low step by chaos operation.
Automatic decision of High, Medium, and Low step by chaos operation.

Only use by remote control.

Set off after opertion for one hour in medium mode, and two hours in low mode.
Reserve function which is off after on time of 30 minutes, 1,2,3, and 5 hours.

Displayed at the time of indoor temperature sensor open or short.
Displayed when the panel shutter opening/closing is not sensed.
Displayed at the time of EVAP. Sensor open or short. (Heating mode)
Displayed at the time of COND. Sensor open or short. (Heating mode)

Continuously operating compressor & powerful operating fan motor(30 minutes).
In case of heating operation, prevention against cold wind function is given
priority before turbo operation. (Cooling:TURBO, Heating:HIGH)

In this mode, operation mode(COOL, HEAT) is selected automatically by room
temperature of initial operation

Operating Instructions and Installation

3-2

VFD display function

Selection of operation mode

Selection of fan speed

Current temperature

Fan speed diagram

Timer function

Convenience function

Airflow function

Others

Auto, Cool, Dry, Fan Heat Display

Auto, natural, high, medium, and low fan speed Display

Temperature display

Turbo, high, medium, and low airflow Display

Timer Display

Timer, turbo lamp, mild Dispaly

Up/Down, Left/Right Display

CHECK Display, Operation Display, Defrost Display

Operating Instructions and Installation

3-3

3-1-2(a) Auto Operation

1. In this mode, operation mode(COOL, HEAT) is selected automatically by the room temperature of
initial operation.

∆T=-1˚C, -2˚C, 0˚C, +1˚C, +2˚C
∆T is controlled by setting temperature TEMP. SET Key of remote contro l l e r.

2 . In Auto mode, the optimum fan speed is selected automatically and cannot be changed.

· Set the "Auto" for heating.

· Set the "NATURAL" for cooling.

3-1-2(b) Cool Operation

1. The compressor is automatically turned on/off by the diff e rence between the current temperature
and desired temperature .

2. By selecting the fan speed , the operation of "low", "medium", "high", "natural", "auto" mode is
s e l e c t e d .

3. The compressor is turned on/off by the change of the current temperature .

• The compressor is turned off when the current temperature is equal to the desired temperature .

• The compressor is turned on when the current temperature is +1˚C of the desired temperature .

4. D e s i red temperature setting range : 18˚C ~ 30˚C it can be changed by the unit of 1˚C.

5. T h ree minutes delay operation of the compre s s o r.

3-1-2(c) Heat Operation

1. The compressor is automatically turned on/off by the diff e rence between the current temperature
and desired temperature .

2. By selecting the fan speed , the operation of "low", "medium", "high", "auto" mode is selected.

3. The compressor is turned on/off by the change of the current temperature .

• The compressor is turned off when the current temperature is +1˚C of the desired temperature .

• The compressor is turned on when the current temperature is -1˚C of the desired temperature .

4. D e s i red temperature setting range : 16˚C ~ 30˚C it can be changed by the unit of 1˚C.

5. Delay operation of the compre s s o r.

3-1-2 Main Controller Function

Room Temp. Operation Type
Tr ≥ 21˚C + ∆T Cool operation (Set Temp.:24˚C + ∆T)
Tr < 21˚C + ∆T Heat operation (Set Temp.:22˚C + ∆T)

T h ree minutes

d e l a y

O N
O F F

4 0 s e c - 3 m i n u t e s .

O N
O F F

• Three minutes delay setting condition

1

After power re s e t

2

On again after compressor off

• Delay setting condition

1

After power reset or shut down

c o m p ressor by control the desire d
t e m p e r a t u re : 3 m i n u t e s .

2

After deice:40sec.

3

After shut down compressor or 4-way

v a l v e : 1 / 2 m i n u t e s

Operating Instructions and Installation

3-4

3-1-2(d) Turbo Operation

Operating condition

1. The turbo operation is available only in auto, cool, mild and heat mode.

2. The turbo operation is performed for 30 minutes when the turbo button is pre s s e d .
(including three minutes delay time)

3. C o n t rol of the indoor fan motor and compressor during turbo operation

•Indoor fan motor = Heating High

Cooling Turbo(fan speed one step higher than “high”)

• C o m p ressor : continued on re g a rdless of room temperature .

4. After an elapse of 30 minutes from the start of turbo operaiton, the turbo operation is ended,
and the unit returns to the previous mode.

5. When you press the turbo key again during the turbo operation, the turbo operation mode is
canceled, and the unit returns to the previous mode.

3-1-2(e) Fan Speed Auto

1. Cooling operation

2. Heating operation

Desired temperature +5

Desired temperature +4˚C

Desired temperature +2˚C

•

The indoor fan motor speed is
automatically contro l l e d
a c c o rding to the diff e re n c e
between the indoor temperature
and the desired temperature .

Desired temperature +4

Desired temperature +3
Desired temperature +2
Desired temperature +1

Desired temperature +0

Desired temperature +1˚C

Low speed area

Medium speed area

High speed area

Desired temperature +0˚C

Desired temperature -1˚C
Desired temperature -2˚C

Desired temperature -3˚C

Desired temperature -1˚C

Low speed area

Low speed area

Medium speed area

Medium speed area

High speed area

(note)

opertion mode of (note)area

set fan speed

turbo fan speed(high speed)

set fan speed

Time,(t)

end of turbo

operation

start of turbo

operation

Indoor fan speed

Compressor control

Operating Instructions and Installation

3-5

3-1-2(f) Dry Operation

Ts = d e s i red temperature

1. O n / o ff time by dry operation mode

• The indoor fan motor operation is fixed at a Low Speed

2. The dry operation mode is determined depending upon the diff e rence between the indoor
t e m p e r a t u re (Ta) and desired temperature (Ts ) .

3. The unit is operated with the compressor on, and an indoor fan motor at a Low Speed for an
initial six minutes (including a three-minute delay) after setting up the dry operation mode.

Room temperature[˚C]

Ts+4
Ts+3
Ts+2
Ts+1

A - MODE

A - MODE

B - MODE

C - MODE

Temperature up Temperature down

B - MODE

C - MODE

Compressor Operating mode

A - MODE B - MODE C - MODE

ON time 6 min. 5 min 3 min.

OFF time 4 min 5 min. 6 min.

Operating Instructions and Installation

3-6

3-1-3 Key Types and Functions

3-1-3(a) Panel Key Types and Functions

KEY OPERATING FUNCTION

Start and end of operation

- ON one time = operation start, ON again = operation end

- No continued operation
Change of the operation mode

-Each time the button is pressed (ON), the mode is changed in the following order ;
"COOL → DRY → FAN → HEAT → AUTO → COOL" (standard = AUTO)

-No continued operation
Setting of the indoor fan motor speed.

-Eacn time the button is pressed (ON), the mode is changed in the following order;
COOL:"LOW → MEDIUM → HIGH → NATURAL → AUTO → LOW" (standard = AUTO)
HEAT:"LOW →MEDIUM → HIGH → AUTO → LOW" (standard = AUTO)

Increase the desired temperature display.

-When turning the jog dial clock-wise, it displays the desired temperature and
holding the jog dial continuously, the desired temperature is increased by the unit of 1˚C
(COOL:18˚C → 30˚C, HEAT:16˚C → 30˚C)

-One short, and continued operation.

Decrease the desired temperature display.

-When turning the jog dial counter clock-wise, it displays the desired temperature and
holding the jog dial continuously, the desired temperature is decreased by the unit of 1˚C
(COOL:30°C → 18°C, HEAT:30°C → 16°C)

-One short, and continued operation.

KEY NAME

ON/OFF

Mode selection

Fan speed

selection

Temperature

setting (up)

Temperature

setting

(down)

KEY TYPE

TACT

TACT

TACT

JOG SHUTTLE

DIAL

JOG SHUTTLE

DIAL

Operating Instructions and Installation

3-7

3-1-3(b) V.F. Display Operating Spec

OPERATING SPEC

• When the compressor is activated (outdoor power relay on) : ON

• When the compressor is stopped (outdoor power relay off) :OFF

• During the defrost operation : ON

• The defrost operation ended : OFF

• Display the selected "operation selection mode"
AUTO, COOL, DRY, FAN, HEAT

• When the ON/OFF is ON, the indoor temperature is displayed.

• When changing the desired temperature, the indoor room temperature is displayed
after displaying the desired for 5 senconds

• The trouble is occured by self - diagnosis funtion :ON

• The troubleshooting is completed : OFF

• During reservation : ON

• Reservation ended or canceled : OFF

• Display the selected "fan speed selection mode"
LOW, MEDIUM, HIGH, NATURAL, AUTO

• Display operation of the indoor fan motor
LOW, MEDIUM, HIGH, TURBO

• During turbo operation : ON

• Turbo operation ended or canceled : OFF

• During mild operation : ON

• Mild operation ended or canceled : OFF

• When [the right and left turn] is on by the remote control, it displays

• When [the up and down turn] is on by the remote control, it displays

DISPLA Y

OPERATING

DEFROST

TEMP.

˚C

SET TEMP.

CHECK

TIMER

AIR
SWING

L

U
D

R

AIR
SWING

TURBO

HEAT

COOL

AUTO FAN

DRY

MILD

AUTO

NATURAL

3-8

3-2-1(b) Outdoor Unit

• place free from the risk of combustible gas leakage.

• place which can bear the weight of the unit.

• place which can bear the fixing strength of the outdoor unit.

• Avoid a place subject to oil(including machine oil).

• Avoid a saline place

• Avoid a place subject to sulfide gas(hot spring zone).
(When installing the unit at such special environmental condi­tions, it may cause machine trouble. When it is unavoidable to
use such places. It re q u i res special maintenance.)

• A place where the discharge air and noise of the outdoor unit
do not disturb the neighborh o o d .
( Take special care not to cause any inconvenience to your
neighbors when installing the unit on the borderline with your
n e i g h b o rh o o d . )

• A place where strong wind does not head against the air outlet
of the outdoor unit.
(If a strong wind heads directly against the air outlet at the
time of cool operation, a safety device can be operated.)

• Do not install the outdoor unit at an unstable place such as
outer wall of an apartment or building.
The outdoor unit may fall down, causing severe personal or
p roperty damage or loss.

• If there is any unavoidable reason to install the unit at such a
place, take the following measures against the wind;

1. When installing the unit at a roadside concentrated with

buildings, install it parallel with the ro a d .

2. Install the unit so that the air outlet faces toward the wall at

a place such as rooftop, which may be subjected to stro n g
w i n d .

* Be sure to install the outdoor unit with consideration of service space.

3-2-1(a) Indoor Unit

• Install the unit at a place close to the wall facing the outside as it is
necessary to perform piping connection with the outdoor unit.

- It is effective to install the unit at a window side to ensure uniform

distribution of indoor temperature .

• Install the unit at a place where there is no obstacle against the wind
a round the air inlet and air outlet.

• Install the unit horizontally at a stable, rigid place.
(When installing the unit at a place subjected to vibration, noise may
o c c u r. )

• Avoid a place near the door which is frequented by people.

• Avoid a place subject to direct sunlight.

3-2-1 Selection of Installation Place

3-2 Installationn

Above 100cm

Above 50cm

•Good method for using
space more efficiency.

Top view

Side view

Wall

Strong wind

Roof top

Above 10cm

Above 10cm

Above 50cm

Above 10cm

Above 50cm

Above 30cm

The air inlet faces toward the wall. The air outlet faces toward the wall.

Space for piping

and wiring

Space for pip­ing and wiring

Operating Instructions and Installation

3-9

3-2-2 Electrical Work

Indoor and Outdoor Connection Wiring

Electrical Wiring

The electrical work should be performed by a specialist qualified for the work.

• Use the single phase power supply, and be sure to install the sub power distributing board for
exclusive use with the unit(separately purchased by the user).

• Avoid octopus-type wiring as it can cause a drop in voltage, thus resulting in poor performance of
the automatic control circ u i t .

• Be sure to install the earth leakage circuit breaker (separately purchased by the user).

• Be sure to connect the grounding wire .

• When connecting the connecting wire between the indoor and outdoor unit, be sure to align the
terminal block number with the connecting wire number.

• When the connecting wire is not properly connected, it may cause tro u b l e .
Be careful not to allow connecting wires and power lines to get in contact with service valve or the
pipe without an insulator.

1 . Connect it to the terminal board N and L for power supply to the outdoor unit.

In so doing, peel off the end of the power cord by about 5mm, and press the cord to the ring ter­minal for hooking.

2 . Perform the power grounding using the screw for exclusive use with the outdoor unit.

Electric power spec Connecting wire & PCB fuse spec

Power
Sub switch
Fuse
Electric wire Below 20m
Allowable voltage

SPEC

Single phase 220V-240V~, 50Hz

30 A
30A

3.5 mm

2

198V ~ 264V

Power cable
Connecting wire

Sensor cable
PCB fuse

TYPE
H07RN-F
H07RN-F
H05RN-F
H05RN-F

50T

F2L

SPEC
3G 2.5mm2450-750V~
5G 1.0mm2450-750V~

2G 0.75mm2300-500V~
2G 0.75mm2300-500V~

250V~, 3.5A

250V~, 2A

1. Connect the connecting wire to the terminal block and
connect the earth wire to the bracket earth.

2. Close the cover control.

3. As following the figure, firmly fix connecting wire with the holder cable.

Color of connecting wire

Model name
KRH28PV2

BRN

1 2 3 4 5

SKY

Thin BRN

BLK

Thin SKY

No.

Electric
panel board

Earth

Cover control

Cable clamp

Cable cover

Holder cable

Terminal block

Base control

Outdoor side

Terminal plate

A

B
C

Wire of sensor

Earth

Power cable

Operating Instructions and Installation

3-10

3-2-3 Installation Method

3-2-3(a) Indoor Unit

This unit is greater in height compared to its width, and thus it may fall down.
T h e re f o re, be sure to fix the unit to the wall and floor surfaces securely to prevent the unit fro m
falling down.

• Fix the unit using the fixing holders separately sup­p l i e d .

• Select a direction (right or left) according to a place of
being installed.

• The fixing holder “B” was decided on a dire c t i o n
( f ront or rear) according to a condition of being
i n s t a l l e d .

1. Fix the fixing holder “B” using the screw at a re a r

side gro o v e .

2. Put the fixing holder “A” on the fixing holder “B”,

then fix holders using the nut, washer and bolt to
d i rection you want.

3. Fix the fixing holder “A” to the wall.

1 . Fix the unit on a flat, rigid floor using the

anchor bolt.
(Anchor bolt : M10 x 4 points - separately
p u rc h a s e d )

1 . Insert the foot holder (4EA, optional).
2 . Remove the nut fastened to the leg holder,

and then insert the leg holder into the hole
of the outdoor unit leg.

3 . Fix the unit securely with the nut.

Fixing to the wall

When using the anchor bolt

When using the leg holder of the outdoor unit

3-2-3(b) Outdoor Unit

Nut

Outdoor unit leg

Leg holder

Foot holder

Anchor bolt fixing dimensions

B

335

A

660

Unit:mm

Operating Instructions and Installation

3-11

3-2-3(c) Installation Procedures

1 Open the inlet grille, and remove the flare nut.
2 . Bend the connection pipe to an appropriate length using the spring bender depending upon the

installation place.

- Allowable pipe length : Maximum 25m

- Allowable pipe drop distance : Maximum 15m

- Make no more than ten bending points on the pipe

• When the pipe length is in excess of the standard pipe length of 5m, add the refrigerant
(R-22) of 50g for each additional 1m.

3 . Install the high pr e s s u re pipe to the heat exchanger liquid pipe, and the low pre s s u re pipe to the

heat exchanger gas pipe respectively using the flare nut, taking care not to cause any leakage of

re f r i g e r a n t .
4 . Be sure to insulate the pipe with appropriate insulation material.
5 . Insert the drain hose into the drain pipe, and connect them by tying them to the cable tie to pre-

vent any water leakage.
6 . After completion of the installation, check the connecting area for any gas leakage.
7 . Wind a finish tape when the wiring of the refrigerant pipe, the unit, and the drain piping are com-

p l e t e d .

• If the pipe is lengthened, the performance of the unit is degraded, and the service life is shortened.
Therefore, the pipe length should be as short as possible (less then 15m).

Caution

Outdoor unit

checking area

Indoor unit
checking area

Operating Instructions and Installation

3-12

3-2-3(d) Connection of refrigerant pipe

1 . Cut the pipe using the pipe cutter.

2. Insert the flare nut into the pipe, and then perform the flare pro c e s s i n g .

• Align the center of the connection piping, and tighten
the flare nut by turning it with hand. Then tighten it
again using the spanner in the direction as shown in
the figure .

1 . Perform bending of the pipe using the bender which has

a specified bending radius.

2 . Be sure to take full care to perform bending of the pipe

successfully at one time. Bending and unbending the pipe
m o re than twice makes the bending work incre a s i n g l y
d i ff i c u l t .

3 . You may use the spring inserted into the gas pipe instead

of the bender to bend the pipe.

4 . When you bend the pipe using the spring, hold the pipe

with both hands to prevent any distortion, and secure a
minimum bending radius of more than 100mm.

Flare Processing

Pipe Bending

Tightening of Connection Parts

Spring

Oblique Roughness Burr

Outer Diameter

ø 6.35 mm
ø 9.52 mm

ø 15.8 mm

A

1.3

1.8

2.0

Final Torque

200kg •cm
450 kg •cm
750 kg •cm

RemarksOuter Diameter

ø 6.35mm
ø 9.52mm
ø 15.8mm

Tightening Torque

160 kg •cm
400 kg •cm
700 kg •cm

1. As the draining is of natural drain type, make the drain hose direct
downward.

2. If there is any foreign substance in the drain plate, it may clog the
drain pipe.
Therefore, be sure to remove the foreign substance inside after
installation.

3. After completion of installation, be sure to pour water into the drain
pan, and then check the draining condition.
(There is no problem in draining when the draining is completed with­in 20 seconds.)

Operating Instructions and Installation

3-13

Piping
Material
Insulator

Vinyl Chloride(Inner diameter ø18mm,

Outer diameter ø 23mm)

Foamed Polyethylene

Caution

3-2-3(e) Drilling a Hole in the Wall

• Drill a hole of 60mm in diameter to the outside.

• The drilling should be done at a distance of less than
150mm from the floor facing the indoor unit.

3-2-3(f) Drain Hosel

• Extend the drain hose to the drain hose connected to the
drain pan, and fix it with the tape or a cable tie to pre v e n t
separation. Then make a covering of it so that water can
not flow outward l y.

• In heating and deice operation, condensed water may
be generated.
Install drain line as gollowing pro c e d u re .

1. Insert the drain plug into drain hole.

2. And then connect drain hose to drain plug.

3 - 2 - 3 ( g )

• The piping of this unit can be connected to the right,
left, and rear side. When you hit the area for piping
connection slightly with a hammer, a hole is made.

• After connecting the piping and drain hose, insert the
rubber cap as shown in the figure below.

Less than

150mm

Hole

Base

Drain plug

Drain hose

Holes for piping connection (3 points)

ø60mm