SAMSUNG KFH28PV20K_KLM.GR017.1.16 Service Manual
PACKAGED AIR CONDITIONER
INDOOR UNIT
KFH28PV2
SERVICE
OUTDOOR UNIT
KRH28PV2
Manual
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
© Samsung Electronics Co., Ltd. MAR. 1999.
Printed in Korea.
Code No. DB81-00071A(1)
1. Precautions
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.
Turn off the sub power switch separately installed.
No connection with the power receptacle
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.
Cleaning
Upon completion of the repair, clean the air
conditioner and surrounding area, and
inform the customer of completion of the repair.
1-1
M E M O
1-2
2. Product Specifications
2-1 Table
I t e m
S i z e
We i g h t
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
M o d e l
Indoor unit
Outdoor unit
P i p i n g
Indoor unit
Outdoor unit
P i p i n 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
1. Evaporator C o n s t ru c t i o n Row x Step
2. Blower motor No. of polarities
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
2. Refrigerant volume R - 2 2 g
3. Compre s s o r M a k e r
4. Fan motor No. of polarities
5. Fan Ty p e
6. Service v/v High pre s s u re side
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
L o w d B
Outdoor unit d B
F i n
C a p i l l a ry tube
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
F i n
M o d e l
Ty p e
C a p a c i t o r
O L P
C a p a c i t o r
R P M
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
2-1
2-2 Dimensions
Indoor Unit
unit : mm
Outdoor Unit
2-2
330
3. Operating Instructions and Installation
3-1 Operating Instructions
3-1-1 Control System Chart
Operation
Operation selector mode
Fan speed selector mode
Main switch operation
Remote control operation
Auto mode
Cool mode
Dry mode
Fan mode
Heat mode
Manual 3-step
Natural
Auto
Auto, Cool, Dry, Fan, Heat operation
Turbo, Mild, Auto, Cool, Dry, Fan, Heat, Timer operation
In this mode, operation mode(COOL, HEAT) is selected automatically by room
temperature of initial 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.
A i rflow selector mode
Timer operation mode
Convenience function
Self-diagnosis function
Right and left turn
UP and Down Turn
ON time
OFF time
Turbo opertion
Mild operation
Q.timer
“E1”
“E2”
“E5”
“E6”
Only use by remote control.
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)
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)
3-1
Operating Instructions and Installation
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
3-2
Operating Instructions and Installation
3-1-2 Main Controller Function
3-1-2(a) Auto Operation
1. In this mode, operation mode(COOL, HEAT) is selected automatically by the room temperature of
initial operation.
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=-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.
O N
O F F
T h ree minutes
d e l a y
• Three minutes delay setting condition
1
After power re s e t
2
On again after compressor off
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.
• Delay setting condition
1
O N
O F F
4 0 s e c - 3 m i n u t e s .
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
3-3
Operating Instructions and Installation
3-1-2(d) Turbo Operation
turbo fan speed(high speed)
Indoor fan speed
set fan speed
Compressor control
(note)
start of turbo
operation
end of 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.
set fan speed
opertion mode of (note)area
Time,(t)
3-1-2(e) Fan Speed Auto
1. Cooling operation
Desired temperature +5
Desired temperature +4
Desired temperature +3
Desired temperature +2
Desired temperature +1
Desired temperature +0
2. Heating operation
Desired temperature +1˚C
Desired temperature +0˚C
Desired temperature -1˚C
Desired temperature -2˚C
High speed area
Medium speed area
Medium speed area
Low speed area
Low speed area
Low speed area
Medium speed area
High speed area
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 -1˚C
Desired temperature -3˚C
3-4
3-1-2(f) Dry Operation
Room temperature[˚C]
Operating Instructions and Installation
Ts+4
Ts+3
Ts+2
Ts+1
Ts = d e s i red temperature
1. O n / o ff time by dry operation mode
Compressor Operating 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 ) .
A - MODE
B - MODE
C - MODE
A - MODE B - MODE C - MODE
ON time 6 min. 5 min 3 min.
OFF time 4 min 5 min. 6 min.
A - MODE
B - MODE
C - MODE
Temperature up Temperature down
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.
3-5
Operating Instructions and Installation
3-1-3 Key Types and Functions
3-1-3(a) Panel Key Types and Functions
KEY NAME
ON/OFF
Mode selection
Fan speed
selection
Temperature
setting (up)
Temperature
setting
(down)
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 TYPE
TACT
TACT
TACT
JOG SHUTTLE
DIAL
JOG SHUTTLE
DIAL
3-6
3-1-3(b) V.F. Display Operating Spec
Operating Instructions and Installation
HEAT
DRY
TEMP.
SET TEMP.
CHECK
DISPLAY
OPERATING
DEFROST
COOL
AUTO FAN
TIMER
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.
˚C
• 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
AUTO
AIR
SWING
AIR
SWING
TURBO
MILD
L
NATURAL
U
D
• 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
R
• 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
3-7
3-2 Installationn
3-2-1 Selection of Installation Place
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(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.
Top view
•Good method for using
space more efficiency.
Side view
Above 50cm
Above 100cm
• 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.
Above 10cm
Above 50cm
Above 10cm
Space for piping
and wiring
Above 10cm
The air inlet faces toward the wall. The air outlet faces toward the wall.
3-8
Wall
Above 50cm
Space for piping and wiring
Above 30cm
Strong wind
Roof top
Operating Instructions and Installation
3-2-2 Electrical Work
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 .
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
2
3.5 mm
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
Indoor and Outdoor Connection Wiring
• 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.
Color of connecting wire
Model name
KRH28PV2
No.
1 2 3 4 5
BRN
SKY
Thin BRN
BLK
Thin SKY
Outdoor side
Terminal plate
Cable clamp
Cover control
Electric
Cable cover
Holder cable
Base control
Terminal block
Earth
1. Connect the connecting wire to the terminal block and
panel board
A
Wire of sensor
B
C
Power cable
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.
Electrical Wiring
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.
Earth
3-9
Operating Instructions and Installation
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.
Fixing to the wall
• 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.
3-2-3(b) Outdoor Unit
When using the anchor bolt
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 )
When using the leg holder of the outdoor unit
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.
Anchor bolt fixing dimensions
Unit:mm
A
660
Nut
Outdoor unit leg
Leg holder
Foot holder
B
335
3-10
Operating Instructions and Installation
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.
Caution
• 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).
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 .
Outdoor unit
Indoor unit
checking area
checking area
3-11
Operating Instructions and Installation
3-2-3(d) Connection of refrigerant pipe
Flare Processing
1 . Cut the pipe using the pipe cutter.
Oblique Roughness Burr
2. Insert the flare nut into the pipe, and then perform the flare pro c e s s i n g .
Outer Diameter
ø 6.35 mm
ø 9.52 mm
ø 15.8 mm
A
1.3
1.8
2.0
Pipe Bending
1 . Perform bending of the pipe using the bender which has
Spring
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.
Tightening of Connection Parts
• 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 .
3-12
ø 6.35mm
ø 9.52mm
ø 15.8mm
Tightening Torque
160 kg •cm
400 kg •cm
700 kg •cm
Final Torque
200kg •cm
450 kg •cm
750 kg •cm
RemarksOuter Diameter
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