Sirge KFR-25GW User manual

I
Split Wall-Mounted Type
Air-Conditioners
Service Manual
KFR-25GW/VWa

CONTENTS
I. Photo of the Production ··············································································· 2
II. Operating Principle ······················································································ 3
III. Exploded Views of the Production ······························································ 5
IV. List of common wearable parts···································································· 8
V. Main Technical Data and Cooling and Heating Characteristic
Curver ·············· 8
VI. Dismantling Procedure ················································································· 11
VII. Fault Analysis of the Product Available and Typical
Examples ························································ 14
1

I Photo of the production
Feature:
1. Stylish and deluxe design
2. Compact size, easy to install and operate
3. Sends out air in gentle stream for physical comfort
4. Use multi-fold evaporator to create the area of heat exchange
5. Intelligent blur defrost
6. Remote control
2

II Operating P rinciple
A. Cooling
After the power supply i s switched on, the m achine is set to COO L mode. With the
compressor being operated, the low-temperature and low-pressure refrigerant vapor is
sucked into the compressor where it is turned into high-temperature and high-pressure
gas. Then it is cooled down in the outdoor heat ex changer b y the air a nd becomes
liquid. Af ter be ing thr ottled b y th e capillary, th e r efrigerant liquid c omes into the
indoor unit and then it e vaporates in th e indoor heat, exchanger, absorbing heat an d
reducing t he room t emperature. The evapo rated refri gerant vapor ret urns t o t he
outdoor unit and is a gain sucked into the compressor, completing the c ycle. With the
refrigerant cycling being kept on, the obj ective of lowering th e room tem perature is
fulfilled.
B. Heating
After the power supply is switched on, the machine is set to HEAT mode and the coil
of the e lectromagnetic four -way v alve is e nergized. Af ter the c ompressor sta rts to
operate, t he hi gh-temperature and hi gh-pressure refri gerant gas fi rst com es i nto t he
heat exchanger of th e indoor unit, wher e it is cooled, releases heat and increases the
room te mperature. The c ooled hi gh-pressure re frigerant is the n thr ottle1d in the
outdoor unit and returns to the compressor af ter evaporation. With such c ycles being
maintained, the objective of increasing the room temperature is fulfilled.
C. System Schematic Diagram
Please see the following Diagram
3

4

III Exploded Views of the Production
Detailed part list of KFR-25GW/VWa indoor unit
S/N Part Name Drawing No. Part No.
1 Front panel assy KFR-25G/V.010.00 KFR-25G/VWa 01
2 Air strainer KFR-25G/V.050.00WX KFR-25G/VWa 02
3 Upper frame assy KFR-25G/V.020.00 KFR-25G/VWa 03
4 Right locating cover KFR-23G/T.000.06 KFR-25G/VWa 04
5 Electric box cover KFR-23G/T.000.09 KFR-25G/VWa 05
6 Indoor control board KFR-23W/T101.041.00 KFR-25G/VWa 06
7 Electric box KFR-23W/T.100.01 KFR-25G/VWa 07
8 Step motor KFR-23G/T.061.00WX KFR-25G/VWa 08
9 Transformer KFR-23G/T.100.03WX KFR-25G/VWa 09
10 Indoor motor KFR-25G/V.070.00WX KFR-25G/VWa 10
11 Lower frame assy KFR-25G/V.040.00 KFR-25G/VWa 11
12 Impeller fan KFR-25G/V.080.00WX KFR-25G/VWa 12
13 Water-collecting plate assy KFR-25G/V.030.00 KFR-25G/VWa 13
14 Left locating cover KFR-23G/T.041.04 KFR-25G/VWa 14
15 Fixing clip KFR-23G/T.000.05 KFR-25G/VWa 15
16 Screw ST4*12FT SJ 2823-87 KFR-25G/VWa 16
17 Eavaporator assy KFR-25G/V.060.00 KFR-25G/VWa 17
5

Detailed part list of KFR-25GW/VWa outdoor unit
S/N Part Name Drawing No. Part No.
1 Top plate KFR-25W/V.000.04 KFR-25W/VWa 01
2 Condenser assy KFR-25W/V.060.00 KFR-25W/VWa 02
3 Electric plate assy KFR-23W/T101.011.00 KFR-25W/VWa 03
4 Fan motor Capacitor CBB61A 1.5uF /450VAC, KFR-25W/VWa 04
5 Compressor Capacitor CBB65A-1K35 uF /450VAC KFR-25W/VWa 05
6 Right rear plate KFR-25W/V.030.01 KFR-25W/VWa 06
7 Handle KFR-32W/T1.050.01 KFR-25W/VWa 07
8 Front plate assy KFR-25W/V.020.00 KFR-25W/VWa 08
9 Nut M6 GB/T 6170-2000 KFR-25W/VWa 09
10 Washer 6 GB/T 93-1987 KFR-25W/VWa 10
11 Washer 6 GB/T 97.1-2002 KFR-25W/VWa 11
12 Propeller fan KFR-35W/B.000.02WX KFR-25W/VWa 12
13 Outdoor motor KFR-23W/T101.070.00WXAK KFR-25W/VWa 13
14 Motor bracket ass KFR-25W/V.040.00 KFR-25W/VWa 14
15
Compressor
ASG108CV-B7AT KFR-25W/VWa.060.00WX KFR-25W/VWa 15
16 Shock absorber KFR-25W/T.090.01WX KFR-25W/VWa 16
17 Base plate assy KFR-25W/V.050.00 KFR-25W/VWa 17
18 Gas valve KFR-32W/VWa.040.00WX KFR-25W/VWa 18
19 Liquid valve KFR-25W/VWa.050.00WX KFR-25W/VWa 19
20 Left rear plate KFR-25W/V.000.02 KFR-25W/VWa 20
21 Screw ST4*10C SJ2823-87 KFR-25W/VWa 21
22 Four-way valve assy KFR-25W/VWa.010.00 KFR-25W/VWa 22
23 Handle assy KFR-35W/V.120.00 KFR-25W/VWa 23
24 Capillary pipe assy KFR-25W/VWa.020.00 KFR-25W/VWa 24
6

KFR-25GW/VWa I NDOOR OF EXP LODE VI EW
7

IV Lists of Common Wearable Parts
List of Wearable Parts of KFR-25G W/VW
No. Description Model Specification
1 Remote controller KFR-23GW/T.010.00WX(A)
2 Indoor temp sensor KFR-22GA.000.00JL-04WX
3 Indoor pipe temp sensor KFR-22GA.000.00JL-05WX
5 Indoor main control board KFR-23G/T101.041.01
6 Display & receive board KFR-23G/T.100.12WX
7 Transformer KFR-23G/T.100.03WX
8 Step moter KFR-23G/T.061.00WX
9 Impeller fan KFR-25G/V.080.00WX
10 Idoor motor KFR-25G/V.070.00WX
11 Propeller fan KFR-35W/B.000.02WX
12 Outdoor motor KFR-23W/t101.070.00WXAK
13 Compressor capacitor KFR-32W/V.030.01WX 32uF/450VAC
14 Outdoor motor capacitor KFR-23W/T101.010.08WX 1.5uF/450VAC
V Main T echnical Data a nd C ooling and H eating C haracteristic
Curves
1. Main technical data:
Model KFR-25GW/VW
Cooling capacity W 2580
Heating capacity W 2860
Air flow m3/h 435
Power supply V, Hz 1PH 230, 50
Rated input current for cooling A 3.7
Rated input current for heating A 3.6
Rated input power for cooling W 800
Rated input power for heating W 790
Max. input power for cooling W 998
Max. input power for heating W 940
Indoor unit 37
Noise
dB(A) Outdoor unit 55
Indoor unit 18.8 67.7 25.0 Dimensions
(D B H) cm Outdoor unit 25.0 65.0 50.6
Net weight Indoor unit 7Kg
8

kg Outdoor unit 25.5Kg
Material R410A
Refrigerant Charge kg 0.63
Power plug cord diameter mm 7.4
Gas pipe 3/8
Pipe size
mm Liquid pipe 1/4
Temperature control range 15 30
Environmental temperature range -7 43
Notes: 1. Rated conditions:
(1) Cooling: Inside Dry-bulb temp. 27 Outside: Dry-bulb temp. 35
Wet-bulb temp. 19 Wet-bulb temp. 24
Heating: Inside Dry-bulb temp. 20 Out side: Dry-bulb temp. 7
Wet-bulb temp. 15 max. Wet-bulb temp. 6
(2) Standard length of pipe connection m: 3.6
(3) Horizontal grille is set in initial position, and the indoor fan speed is high.
2. Maximum conditions:
Cooling: Inside: Dry-bulb temp. 32 Outside: Dry-bulb temp. 43
Wet-bulb temp. 23 Wet-bulb temp. 26
Heating: Inside: Dry-bulb temp. 27 Outside: Dry-bulb temp. 24
Wet-bulb temp. 18
3. The data are only for reference, for details please see label of the unit.
9

2. Data for cooling capacity curve:
Indoor conditions
Dry bulb21
Wet bulb15
Dry bulb27
Wet bulb19
Dry bulb32
Wet bulb23
Dry bulb32
Wet bulb23
Outdoor conditions
O perating
conditions
Index Dry bulb15 Dry bulb35
Wet bulb24
Dry bulb43
Wet bulb26
Dry bulb52
Wet bulb32
Cooling Capacity Curve
2300
2350
2400
2450
2500
2550
2600
    
Dry-bulb temp representing outdoor conditions
Cooling Capacity (W)
3. Data for heating capacity curve:
Indoor conditions
Dry bulb20
Wet bulb15
Dry bulb20
Wet bulb15
Dry bulb20
Wet bulb15 Dry bulb27
Outdoor conditions
O perating
conditions
Index Dry bulb-7 Dry bulb2
Wet bulb1
Dry bulb7
Wet bulb6
Dry bulb24
Wet bulb18
Heating Capacity Curve
1600
1800
2000
2200
2400
2600
2800
        
Dry-bulb temp representing outdoor conditions
Heating Capacity (W)
10

D ismantling Procedure
Indoor Unit
Operating step Photo
1. Remove the panel.
3FNPWFVQQFSGSBNFBTTZ
Remove the air strainers.
Remove two scre w cov ers and tak e
off three screws of upper frame.
Remove the upper frame.
3. Remove the electric box
(1) Remove one sc rew of el ectric cover,
remove the electric cover.
(2) Remove the scr ew of earthing wire,
and take off the sensors.
(3) Remove the wires and one screw ,
remove board and electric box.
4. Take o ff one s crews of water-collecting
plate and remove water-collecting plate.
5. T ake of f two s crews of left locatin g
cover and two scr ews of motor f astener.
Remove evaporator.
11

6.Remove impeller fan and indoor motor
a) Remove the four screws of motor
fastener
b) Remove the screw of impeller fan.
c) Remove the motor and impeller.
Outdoor Unit
Operating step Photo
1. Take off 6 screws of upper cover
2.
(1) Take off one screw of handle and
remove handle;
(2) Take o ff 8 s crews of f ront plate and
remove front plate;
12

3
(1) Take off screws of electric board and 5
screws o f l eft pl ate an d rem ove l eft
plate;
(2) Take of f 4 scr ews of r ight plate and
remove right plate.
4.
(1) remove el ectric assy;
(2) Take of f nut and wash ers, and remove
propeller fan
5. T ake off four screws of motor and
remove motor.
6.remove compressor
(1) remove compress cover
(2) remove compressor protector
(3) welding compress suction pipe and
discharge pipe
(4) remove compressor
13

Fault Analysis of the Product Available and Typical Examples
1 Procedure of deciding the faults
Before maintaining the air conditioner, firstl y you should know the phen omena
of the faults, decide the l ocation of the faults, analyze the reason the faults occur, and
then sear ch fo r ways to solve the faults . Th e det ailed procedures ar e: Look, Listen,
Touch, Measure, Analyze
Look: Obse rve air c onditioner’s runnin g. I.e., vibration; condensati on on
evaporator; leakage; electrical and mechanical connection, etc.
Listen: Listen to kind s of sounds o f the runni ng air conditioner. Identify the
abnormal noise from the sounds.
Touch: Touch the key position and position faulty. Touch the temp of air flow
to decide th e he ating o r coolin g e ffect; as fa r to abnormal sound, be sides adopt
“listen”, you should to uch the f rame, the pipe of the air conditioner to feel the
vibration. Touch the easily heated parts, i.e. compressor, motor, touch them to feel the
temp.(Warning: High temp).
Measure: Measure the parameters of t he air conditioner and relev ant parts by
some instruments. Usually used instruments: amperemeter, voltmeter multimeter
thermometer, etc, i.e ., Use multime ter to te st whe ther the capacitor i s ope n, the
insulation of the wire and the parameters of other electrical parts; use the thermometer
to measure temp of airflow.
Analyze: An alyze the above results, de cide the reason and loc ation of f aults,
and seek the solutions.
2 Types of Normal Faults
The t ype of faults is various. The norma l faults can come down to si x types:
leaks, block, open circuit, burnt, lock, scrape.
Leak Mainly is le akage of R410A from cooling pipe s ystem and parts;
leakage of condens ation wate r f rom indoor units; electric al le akage f rom electri cal
system and wires.
Block Mainly is block of the pipe system, block of capillary, block of strainer
or valve.
Open Cir cuit Mainly is op en circuit of e lectrical c ircuit, inc lude: f use
blowing out, connectors broke.
Burnt Mainly is bu rnout of fan motor , of compressor , of capa citor, of
transformer.
Lock Mainly is lock of compressor, four-way valve.
Scrape Mainly is sc rape of indoo r/outdoor fan and ne arby parts, and sound
abnormally.
3 Examples
3.1 Leakage and seepage of indoor unit
Reason Check to be made Proposed remedy
Improper installation. Indoor
drain position is lower than
outdoor or slantin g installation
of indoor unit
Observe if the condensation
water d rain out, if the indoor
unit is declining
Level the indoor unit and
adjust the height
Water collecting plate is blocked Check if the plate is blocked Remove the matters block the
plate
14

Water col lecting pl ate o r drai n
pipe is cracked
Check the location, ensure if it
is cracked Replace the plate or pipe
Loosen wrap belt,
heat-preservation layer is bad or
layer behind indoor units is bad
Connecting pipe bleed the
water, condensation water
exists behind the indoo r unit,
the wall is wet and turn colors
Rewrap the connecting pipe,
add new heat-preservation
layer
High ambient relative humidity,
low temp/speed of air flow
Water is blow out from air
outlet, or wa ter dr ips from the
outlet. Lower speed of air flow
Suggest set the units to
dehumidifying mode at hig h
speed of air flow , to lower
relative humidit y; if th e hig h
speed is still f elt lowe r, the
fan motor must be checked
3.2 Poor cooling or heating effect
Reason Check to be made Proposed remedy
The c ooling/heating load of the
room is heavy or the room is not
closed perfectly
Calculate the area of t he room,
check the close of the room
Enlarge t he cap acity o f t he
units, improve the
leakproofness of the room
Insufficient refrigerant R410A Measure the operating current Add R410A welding the
leaked point
Too much R410A
Air inta ke te mp is too low ,
condensation water on air
intake pipe is too much, te mp
of discharge is too high
Discharge a little R410A
Effect of he at ex change i s t oo
poor
Dust on outdoor condens er and
indoor filter is too much Cleanup filter and condenser
Some of the winding s o f motor
fan is short-circuit, so cause
speed decline
Speed of indoor/outdoor fan is
too low, air circulation is small Repair or replace motor
Running condition is too bad
Check if the installation is
proper; outdoor temp is too
high when heating
Improve the condition, use
auxiliary heating
Convexity ex ists in compressor
or valve or lock of compressor
No high-low pressure
difference, no clear temp
difference in a ir intake inlet or
discharge outlet of compressor
Replace compressor or valve
Openness of che ck valv e is too
small or the s ystem p artly or
completely blocked
Check the openness; partly
frost on outdoor pipe system
Open the valve; use high
pressure N 2 to c lean o ut the
block
3.3 Big noise or abnormal sound
Reason Check to be made Proposed remedy
Foreign ma tters in win d g uide
or impeller fan Check if they are Clear away
Fan is distorted or in bad
balance Check them Replace indoor/outdoor fan
Improper location of fan , so fan
touches the housing
Open the unit or move t he fan
manually, find the location Adjust the position
Bearing of the f an is slu ggish or
destroyed Check the bearing Replace the bearing
15

Connecting pipe vibr ates due to
improper installation, or touch
the lower frame
Check the connecting pipe Tidy up the pipe s, e liminate
the noise source
Outdoor pipes touches Check the vibration of the
pipes, check if them touch Tidy up the pipes
Abrasion of the parts of
compressor
Check if the sound of
compressor is normal Replace the compressor
3.4 Frequently switch on/off of the compressor
Reason Check to be made Proposed remedy
Running voltage is too low Measure the voltage Add measures of voltage
stabilization
Discharge temp is too high
caused by insufficient of
R410A, compressor is pr otected
by overheat
Check condensation of air
intake pipe or measure if
operating current is lowe r tha n
rated current
Check leakage point, welding
or add R410A
Temp sensor is too close to
evaporator or moved Check the position of sensor Adjust the position or repl ace the sensor
Air inlet/outlet of heat exchange
is blocked o r low sp eed of fan
motor; indoor air filter is too
dirty or blocked
Check indoor/outdoor heat
exchange, speed of m otor, ai r
inlet/outlet
Cleanup the filter, remove the
obstacle
Too much R410A
Too much condensation water
on air intake pipe, high
operating current
Discharge a little R410A
Bad insulation of com pressor,
high operating current,
overcurrent proof
Check start or operating
current Replace compressor
Improper temp set Check actual ambient temp Reset
3.5 Promptly protected by halt after compressor starts
Reason Check to be made Proposed Remedy
Insufficient R410A
Little or no condensation water
on air intak e pipe, op erating
current is lower than rated
current
Add R410A
Mixed wi th a ir in the system,
vacuum is not good Power varies when running Vacuumize the system,
recharge R410A
Blocked caused by water or
impurity
Operating current is lower than
rated current, pa rt of th e unit
frosts heavily
use high pressur e N 2 t o cl ean
out the block, revacuumize
and recharge R410A
Damaged compressor, high start
current
Check the windings and
insulation of compressor and if
it is locked
Replace the compressor
3.6 The units blow out cool air when in heating mode
Reason Check to be made Proposed Remedy
Four-way valve doesn’t work
Listen to the units if t here is
sounds of valve’s working
when heating or cooling
Replace the valve
16

Faults of control inte rrupter or
other relevant circuits of the
valve
Check the circuit Repair or replac e the c ontrol
board
Insufficient R410A cau ses the
insufficient heating capacity
Little condensation water on
outdoor air intake pip e, low
operating current
Add R410A
Connexity of compressor
Same te mp of a ir inta ke inle t
and discharge outlet of the
compressor, no condensation in
air intake inlet
Replace the compressor
3.7 The units doesn’t work
Reason Check to be made Proposed Remedy
Bad conn ection of the power
plugs, or no power plug Check the socket Repair or replace
Outdoor fuse or indoor fuse is
burnt Check if the fuse is good Replace the fuse
Low voltage Measure the voltage Heighten the voltag e o f the
power supply system
Wrong indoor temp set
Measure actual indoor temp,
compare to the s et te mp ( in
cooling set temp should be
lower than the actual, in
heating, is higher)
Reset the temp
Wrong running mode of indoor
units set
Check if running mode of two
indoor units is the s ame (it is
not available if on e is h eating
and another is cooling)
Reset
3.8 Cannot receive the remote control signal
Reason Check to be made Proposed Remedy
Damaged remote control or low
battery
Check if the indication is
normal
Replace the remote control or
battery
Short-circuit of conne ctions of
main control boa rd to switc h
board
Check the board Replace the components
Running mode o f two indoor
units is not the same
Check if one is he ating a nd
another is cooling Reset
Indoor units are in test mode Open the air intake grill to se e
the running mode
Adjust te st mode to r emote
control mode
Remarks The above- mentioned ‘faults’ are the faults possibl y oc cur, we will
continue to collect the faults and analysis.
17