R407C - mitsubishi-les.info · -Using a charging cylinder may cause the refrigerator to...
Transcript of R407C - mitsubishi-les.info · -Using a charging cylinder may cause the refrigerator to...
TECHNICAL & SERVICE MANUAL
SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
CONTENTS
1. FEATURES ·········································22. SAFETY PRECAUTION ·····················33. PART NAMES AND FUNCTIONS······44. SPECIFICATION·································65. OUTLINES AND DIMENSIONS ·········86. WIRING DIAGRAM·····························97. REFRIGERANT SYSTEM DIAGRAM···108. TROUBLESHOOTING······················119. DISASSEMBLY PROCEDURE·········16
10. PARTS LIST ·····································19
<Indoor unit>
PKFY-P20VAMPKFY-P25VAM
No. OC163
1998
Models
Wall MountedSeries PKFY
INDOOR UNIT
MODEL NAME
R407C
2
FEATURES1
1. Compact 29.5cm high body fits snugly in even limited spaces.
2. Lightweight 8.5kg unit easy to transport and install.
3. Auto-flap shutter enhances good looks.
4. Front power supply box for easier wiring even after installation.The front power supply box allows electrical wiring work to be done after the indoor unit has been installed. For easierinstallation, all the screws required for securing the indoor unit to the wall are accessible from the front of the unit.
5. 5-way piping provides more flexibility in selecting installation sites.All piping including drainage can be conned from the rear, right, base, left and left rear of the unit, providing muchgreater flexibility in laying out piping and selecting installation sites.
Indoor unit
Wall MountedSeries PKFY
Models
P K F Y- P 2 0 VA MP K F Y- P 2 5 VA M
Cooling capacity/Heating capacity
W
2,300 / 2,6002,900 / 3,300
kcal/h
2,000 / 2,2502,500 / 2,800
3
2 SAFETY PRECAUTION
Precautions for devices that use R407C refriqerant.
Cautions for connecting with R407C outdoor unit..Caution:· Do not use R407C piping after use it for R22.· Do not use the existing refrigerant piping.
-The old refrigerant and refrigerator oil in the existing piping contains a large amount of chlorine which may cause therefrigerator oil of the new unit to deteriorate.
· Use refrigerant piping made of C1220(CU-DHP) phosphorus deoxidized copper as specified in the JIS H3300“Copper and copper alloy seamless pipes and tubes”. In addition, be sure that the inner and outer surfaces of thepipes are clean and free of hazardous sulphur, oxides, dust/dirt, shaving particles, oils, moisture, or any othercontaminant.
-Contaminants on the inside of the refrigerant piping may cause the refrigerant residual oil to deteriorate.· Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before
brazing. (Store elbows and other joints in a plastic bag.) -If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result.
· Use ester oil, ether oil or alkylbenzene (small amount) as the refrigerator oil to coat flares and flange connections.-The refrigerator oil with degrade if it is mixed with a large amount of mineral oil.
· Use liquid refrigerant to fill the system.-If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performancemay drop.
· Do not use a refrigerant other than R407C.-If another refrigerant (R22, etc.) is used, the chlorine in the refrigerant may cause the refrigerator oil to deteriorate.
· Use a vacuum pump with a reverse flow check valve. Evacuate sufficiently for one hour, leave it put for another onehour and be sure not to down the vacuum degree.
· Do not use the following tools that are used with conventional refrigerants.
No. Tool name Specifications1 Gauge manifold ·Only for R407C.
·Use the existing fitting SPECIFICATIONS. (UNF7/16)·Use high-tension side pressure of 35kgf/cm2 or over.
2 Charge hose ·Only for R407C.·Use pressure performance of 52kgf/cm2 or over.
3 Electronic scale4 Gas leak detector ·Use the detector for R134a or R407C.5 Adapter for reverse flow check. ·Attach on vacuum pump.6 Refrigerant charge base.7 Refrigerant cylinder. ·For R407C ·Top of cylinder (Brown)
·Cylinder with syphon8 Refrigerant recovery equipment.
· Do not use a charging cylinder.-Using a charging cylinder may cause the refrigerator to deteriorate.
· Be especially careful when managing the tools.-If dust, dirt, or water gets in the refrigerant cycle, the refrigerant may deteriorate.
· For gas leak detecter, be sure to use it only for HFC refrigerant. (same as for R134a)· If moving, put the cap on the flare at indoor unit side to prevent to mix dust or water.· If measures on refrigerant leackage or repair servicing, be sure to refer the manual for outdoor unit.
4
PART NAMES AND FUNCTIONS3
● Indoor UnitPKFY-P20VAMPKFY-P25VAM
● Remote controller [PAR-F25MA]● Once the operation of the unit is set, subsequent operations can only be performed by pressing the ON/OFF button
repeatedly.
TIMER button
This switches between continuousoperation and the timer operation
AIR SPEED button
The sets the ventilation fan speed.
● Operation buttons
TIMER SETTING button
This sets or switches the currenttime, start time and stop time.
OPERATION SWITCH button
Press this button to switch the coolerelectronic dry (denumidity),automatic and heater modes.
TEMP ADJUSTMENT button
This sets the room temperature. Thetemperature setting can beperformed in 1°C units.
Setting range : Cooler 19°C to 30°CHeater 17°C to 28°C
CHECK-TEST RUN button
Only press this button to perform aninspection check or test operation.Do not use it for nomal operation
FILTER button
This resets the filter serviceindication display
AIR DIRECTION button
This adjusts the vertical angle of theventilation.
ON/OFF button
This switches between the operationand stop modes each time it ispressed. The lamp on this buttonlights during operation.
The model name of the remotecontroller is indicated. LOUVER button
This switches the horizontal fanmotion ON and OFF.
(This button does not operate in thismodel.)
Air intake grille Air intake
Guide vane Air Outlet
Aute Vane
Filter
5
Caution● Only the / display lights when the unit is stopped and power supplied to the unit.● “NOT AVAILABLE” is displayed when the AIR DIRECTION button are pressed.This indicates that this room unit is not
equipped with the fan dieection adjustment function and the louver function.● When the power is turned on, “‘HO” is indicated on the room temperature indication area for a while (maximum for 2
minute). It does not indicate a malfunction. Operation the unit after “‘HO” indication disappear.● When power is turned ON for the first time, it is normal that “HO” is displayed on the room temperature indication(For max.
2minutes.) Please wait until this “HO” indication disappear then start the operation.
CENTRALLYCONTROLLED display
This indicates when the unit iscontrolled by optional features suchas central control type remotecontroller.
TIMER display
This indicates when the continousoperation and time operation modesare set.It also display the time for the timeroperation at the same time as whenit is set.
OPERATION MODE display
This indicates the operation mode.
STANDBY display
This indicates when the standbymode is set from the time the sleepoperation starts until the heating airis discharged.
DEFROST display
This indicates when the defrostoperation is performed.
CHECK display
This indicates when a malfunctionhas occurred in the unit which shouldbe checked.
CLOCK display
The current time , start time and stoptime can be displayed in tensecondintervals by pressing the time switchbutton. The start time or stop time isalways displayed during the timeroperation.
● Display
In this display example on thebottom left, a condition where alldisplay lamps light is shown forexplanation purposes although thisdiffers from actual operation.
Operation lamp
This lamp lights during operation,goes off when the unit stops andflashes when a malfunction occurs.
POWER display
This lamp lights when electricity issupplied to the unit.
SET TEMPERATURE display
This displays the selected settingtemperature.
AIR DIRECTION display
This displays the air direction.
ROOM TEMPERATURE display
The temperature of the suction air isdisplayed during operation. Thedisplay range is 8° to 39°C. Thedisplay flashes 8°C when the actualtemperature is less than 8° andflashes 39°C when the actualtemperature is greater than 39°C.
display
This display lights in the check modeor when a test operation isperformed.
CHECK MODE
TEST RUN
This lamp lights when the filter needto be cleaned.
AIR SPEED display
The selected fan speed is displayed.
FILTER display
6
4 SPECIFICATION
2-1 Specification
Power Supply
Starting Current
Fan ✕ No.
Air flow (Note 2)
External stafic pressure
Fan motor output
Item
Power
Cooling capacity
Heating capacity
Exterior <munsell symbol>
Out dimensions
Heat exchanger
Fan
Insulator
Air filter
Pipe dimensions
Drain pipe size
Noise level
Product weight
Unit
[,V,Hz
Z/h
Z/h
kW
kW
A
A
—
mm
mm
mm
—
—
K/min
Pa
kW
—
—
[mm
[mm
[mm
dB (A)
kg
Cooling
Heating
Cooling
Heating
Height
Width
Depth
Gas side
Liquid side
PKFY-P20VAM
2,000
2,250
PKFY-P25VAM
2,500
2,800
Single phase ,220V-240V,50Hz
0.04
0.04
0.20
0.20
Plastic munsell : <2.60Y 8.66/0.69>
295
815
158
Cross fin
Lineflow fan ✕ 1
5.9-5.6-5.2-4.9
0
0.017
Polyethylene sheet
PP honey comb
12.7 <1 / 2F>
6.35 <1 / 4F>
Outer dimeter [28 Outer diameter of the connection
36-35-33-32
8.5
Ele
ctric
char
acte
ristic
Note 1. Rating conditions (JIS B8615)Cooling : Indoor 27°C DB. 19.5°C WB
Outdoor 35°C DB. 24°C WBHeating : Indoor 21°C DB.
Outdoor 7°C DB. 6°C WB
Note 2. Air flow and the noise level are indicated as High-Middium 1-Middium2-Low.
7
2-2 Electrical parts specifications
Model
Transformer
Room temperature thermistor
Liquid pipe thermistor
Gas pipe thermistor
Fuse
(Indoor controller board)
Fan motor
(with thermal fuse)
Fan motor capacitor
Vane motor
(with limit switch)
Liner expansion valve
Power supply terminal block
Transmission terminal block
Symbol
T
TH21
TH22
TH23
FUSE
MF
C1
MV
LEV
TB2
TB5
(Primary) 50/60Hz 220-240V (Secondry) (18.4V 1.2A)
Resistance:
0�C / 15k�, 10�C / 9.6k�, 20�C / 6.3k�, 25�C / 5.4k�, 30�C / 4.3k�, 40�C / 3.0k�
Resistance:
0�C/15k�, 10�C/9.6k�, 20�C/6.3k�, 25�C/5.4k�, 30�C/4.3k�, 40�C/3.0k�
250V 6.3A
4-Pole Output 17W / RC4V17
1.5�F ✕ 440V
MSFBC20A76 DC12V
DC12V Stepping motor drive
Port [3.2 (0~2000pulse) EDM-402ME
(L, N, ;) 264V 20A
(M1, M2,S ) 250V 10A
PKFY-P20VAM/PKFY-P25VAM
8
5 OUTLINES AND DIMENSIONS
Unit : mm
783
C
D
A
B
CB
AD
25.5
159
407.5
328 328
298
235
235
205
205
175
175
170
170
10
100
298
407.5
168
135
125
110
35 10 27.5
40 53 65 87 113
128
0
295
260
260
225
225
190
190180
159155
155
120
120
85
85
30
3045 4450
0
133
122.
597
.5 85 6047
.522
.5 15 9010
2.5
124 4-
4.5✕
35
4-4
.5✕
40 4
-4.5
✕37 4
-11✕
20
8-
4.3
0
72.5
13
Air intake dimension
Air
inta
keIn
stal
latio
n pl
ate
Kno
ck o
ut h
ole
Inst
alla
tion
spac
e
100
or m
ore
20 or more
20 or more
130
or m
ore
Add
ress
boa
rd
Dra
in p
ipe
Liqu
id p
ipe
Fla
re c
onne
ctio
n 1/
4F
Fla
re c
onne
ctio
n 1/
2F
Insu
latio
n ou
t dim
entio
n
28
Insu
latio
nO
ut d
imen
tion
35
Gas
pip
e
Refri
gran
tpi
pe
Add
ress
boa
rd is
pro
tect
ed b
yth
e pl
astic
cov
er.
For
the
setti
ng, r
emar
k 1-
scre
wus
ing
the
scre
w d
river
.
Inst
alla
tion
plat
e
Air
inta
ke d
imen
sion
Air
inta
ke d
imen
sion
Air
outle
t dim
ensi
on
Dra
in p
ipe
leng
th
Gas
pip
e
Det
ail o
f Ter
min
al b
lock
Term
inal
blo
ck fo
r re
mot
e co
ntro
ller
Term
inal
blo
ck fo
r re
mot
e co
ntro
ller
Term
inal
blo
ck fo
r po
wer
sup
ply
addr
ess
boar
d
Air
outle
tan
gle
Air
outle
t di
men
tion
Air
outle
t dire
ctio
n
Det
ail o
fad
dres
s bo
ard
Dip
sw
ich
Term
inal
blo
ck
Term
inal
blo
ck fo
r po
wer
sup
ply
Kno
ck o
ut h
ole
for
right
- h
and
side
pip
ing
Kno
ck o
ut h
ole
for
left
- ha
ndsi
de p
ipin
g
Kno
ck o
ut h
ole
for
unde
r pi
ping
Liqu
id p
ipe
815
630
695
660
450
520
54
50
16 4591
.510
34
2.5
2.516
450
10
455
45
3
R15
R15
R15
R12
R8
R8
R8
10
24.4
116
11060
146
295
21.5
247.
515
0
158
70.3
37.4
52.
560
13
80
4-
9
12-
2.8
87-
5.1
65
17
3
1
1
Not
e1.F
or th
e in
stal
atio
n, b
e su
re to
leav
e so
me
spac
e in
cas
e th
ere
i
s fin
ge a
t edg
e of
the
celin
g.N
ote2
. Use
the
M10
or
W3/
8 bo
lt fo
r th
e is
talla
tion
plat
e.N
ote3
. Ref
er fo
r th
e sp
ecifi
catio
n ta
ble
it be
low
.
Det
ail o
f kno
ck o
ut h
ole
(A B
C)
Conn
ectio
n ou
t dim
entio
n
28
Lota
ry s
witc
h(pa
rt N
o.)
Lota
ry s
witc
h(se
lf ad
dres
s)
Seco
ndry
Prim
ary
Kno
ck o
ut h
ole
for
the
rem
ote
cont
rolle
r w
iring
Kno
ck o
ut h
ole
for
the
rem
ote
cont
rolle
r w
iring
Con
trol
wire
(30
v)
: Fol
low
the
inst
ruct
ion
stat
ed a
t Not
e3 fo
r t
he c
onne
ctio
n w
ith th
e co
ntro
l wire
.
: The
re is
no
term
inal
boa
rd fo
r co
ntlro
ller.
54 or more for left or left back piping
Uni
t tra
nspl
ant p
arts
pipe
hol
e
Pos
ition
det
ail o
f the
tapp
ing
scre
w a
nd b
ats
at p
ipe
inta
ke
Cen
ter
of g
ravi
ty h
ole
for
inst
alla
tion
Air intake dimention
PKFY-P20VAM,PKFY-P25VAM
9
WIRING DIAGRAM6
PKFY-P20VAM, PKFY-P25VAM
Legend
Symbol Name
TH23Gas pipe thermistor(0°C / 15k�, 25°C / 5.4k�)
P.B Indoor power board
ZNR Varistor
FUSE Fuse (6.3A)
F.C Fan phase control
T Transformer
MF Fan motor
C1 Fan motor capacitor
MV Vane motor
LEV Linear expansion valve
Symbol Name
M.B
CN32
Indoor controller board
Remote switch connector
CN41 HA terminal — A connector
CN51 Centrally control connector
CN52 Remote indication connector
SW2 Capacity cord switch
SW3 Function selector
TH21Room temperature thermistor(0°C / 15k�, 25°C / 5.4k�)
TH22Liquid pipe thermistor.(0°C / 15k�, 25°C / 5.4k�)
Symbol Name
TB2
TB5
Power supply terminal block
Transmission terminal block
A.B Address board
SW1 <A.B> Mode selector
SW5 <A.B> Voltage selector
SW11 <A.B> 1st digit address setting
SW12 <A.B> 2nd digit address setting
SW14 <A.B> Connection No. setting
T O NEXTINDOOR UNIT
PULLBOX
FUSE(15A)
BREAKER (15A)
AC220-240V
SW5220V 240V
BLU
WHT
BLU
BLU
RED
BLK
RED
BLU
0 0
M2M1 REMOTE CONTROLLER
DC24-30V
{
BC CONTROLLERT O OUTDOOR UNIT
S(SHIELD)
GRN/YEL
~/N 220-240VAC 50HzPOWER SUPPLY
N
TB2L
MICONBOARD
(WHT)
POWER BOARD
ADDRESS(RED)
(WHT)
REMOTEINDICATION
CONNECTIONNO.
1STDIGIT
2NDDIGIT
3RDDIGIT
ADDRESS(RED)
F.CZNR
31
P.B
See fig:❈1
BLU
YELORN
PNK
WHTYEL
MF
5
TH21TH23 TH22
LEV ORNBLURED
RED
BRN
MV
LED5
0
A.B
SW14SW11SW12
SW1
10987654321OFF
ON 1
1
8
(RED)ADDRESS
CN43
CN82
44
8
6.3A250VFUSE
AC18.4V
T
C1
CND(RED)(GRN)
F AN1 1 21 4 61 2
(BLU)M-NETCN2M
1 2
LIQUIDCN21
CN53-P
MICONBOARD
CN35-P
1
5
M.B
POWER BOARDCN53-M 1 5
3CN35-M 1
LED4 LED3 LED2 LED1
SW24
32
1
0N0FF
SW3
109
87
65
43
21
51
CENTRALLYCONTROL
CN51
54
11
(WHT)
CN52CN42
(RED)ADDRESS
1 8
CN81
(RED)INTAKE
CN20
21
(WHT)
CN60LEV
(BLK)GAS
CN29
(GRN)REVOLUTION
CN33
26 11
6
1 2 3
CN32REMOTESWITCH(WHT)
1 2 31 2 3 4
HACN41(WHT)
(BLU)CN5V
51
TB5
Note1. At servicing for outdoor unit, always follow the wiring diagram of outdoor unit.2. Symbol [S] of TB5 is the shield wire connection.3. Symbols used in wiring diagram above are, / : terminal block, [ : connector, ● : direct wire connection.4. The setting of the SW2 dip switches differs in the capacity for the detail, see the table below.5. Please set the switch SW5 accordng to the power supply voltage.
SW5 to 240V side when the power supply is 230 and 240 volts.When the power supply is 220 volts, set SW5 to 220V side.
[
ONOFF
1 2 3 4
MODELS SW2
PKFY-P20VAMONOFF
1 2 3 4
MODELS SW2
PKFY-P25VAM
<❈ 1>
BG79N652H01
10
7 REFRIGERANT SYSTEM DIAGRAM
Strainer (#100mesh)
Strainer (#50mesh)
Heat exchanger
Room temperature thermistorTH21
Gas pipe thermistorTH23
Liquid pipe thermistorTH22
Gas pipe
Flare
Linear expansion
valve
Gas pipe
PKFY-P20VAM, PKFY-P25VAM
{12.7 <1/2F>
Liquid pipe {6.35 <1/4F>
ModelsItem
Refrigeration pipe size (Flare connection size)
PKFY-P20VAM,PKFY-P25VAM
11
8 TROUBLESHOOTING
6-1. How to check PKFY-P20VAM,PKFY-P25VAM
Room temperaturethermistor(TH21)Liquid pipethermistor(TH22)Gas pipethermistor(TH23)
Vane motor
Fan motor
Linear expansionvalve
Disconnect the connector, then measure the resistance using a tester.(Sorrounding temperature 10°C~30°C)
Part Name Check points
1Measure the resistance between the terminals using a tester.(Surrounding tempreture 20:.)
Disconnect the connector then measure the resistance valve using a tester.(Coil temperature 20°C)
(Refer to the thermistor)
Normal AbnormalWhite-Black 195'
Open or shortRed-Black
Normal
Abnormal
!At first, check if the electrical pressure is 12V between the brown wire(GND) and yellow wire(VCC).
@Slowly start running the fan. It is normal if while the fan rotate once,the electrical pressure change from 0V to12V then go back to 0V.
If the electrical pressure stay at around 0V or 10V, it means the fanmotor has the defects.
200'
Normal
(1)-(5)White-Red
150' ±10%
Abnormal
Open or short(2)-(6)
Yellow-Brown(3)-(5)
Orange-Red(4)-(6)
Blue-Brown
Normal
1-2Red-Pink
400' ± 7%
Abnormal
Open or short1-3
Red-Blue1-4
Red-Orange1-5
Red-Yellow
WhiteRed
Black
Brown Gray Yellow
CN33
1
4
6
3 2 1
FAN1
123456
LEV
White
Yellow
Orange
Blue
Red
Brown
CN60
2Without disassembling the parts, measure the electrical pressure of the gray wire(Signal line) andbrown wire (GND) while the power is on.
1Measure the resistance between the terminals using a tester.(Surrounding tempreture 25:.)
Normal4.3k'~9.6k'
AbnormalOpen or short
Blue
YellowRed
Orange Pink
3
5
1
4 2Connect pin No.
12
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
< Thermistor for lower temperature >
Temperature (:)
Res
ista
nce
(K"
)
4 [4
3
6
5
[3
2 [2
1 [1
[4
[3
[2
[1
Controller board
Drive circuit
Connector(CN60)
DC12V
Brown
Red
Blue
Orange
Yellow
White
M
4
6
2
3
51
Blue
Brown
Yellow
OrangeRedWhite
Linear expansion valve
<Thermistor Characteristic graph>
Room temperature thermistor(TH21)Liquid pipe thermistor(TH22)Gas pipe thermistor(TH23)Drain sensor(THD)
Thermistor R0=15k' ± 3%Fixed number of B=3480k' ± 2%
Rt=15exp { 3480( ) }
0: 15k'10: 9.6k'20: 6.3k'25: 5.2k'30: 4.3k'40: 3.0k'
Thermistor for lower temperature
Linear expansion valve
① Operation summary of the linear expansion valve.• Linear expansion valve open/close through stepping motor after receiving the pulse signal from the indoor controller board.• Valve position can be changed in proportion to the number of pulse signal.<Connection between the indoor controller board and the linear expasion valve>
1273+t
1273
Note : Since the number of the connector at the controller board side and the relay connector are different, follow the color ofthe lead wire.
13
Output(Phase)
Output
{1
1
ON
{2 ON
{3 OFF
{4 OFF
2
OFF
ON
ON
OFF
3
OFF
OFF
ON
ON
4
ON
OFF
OFF
ON
<Output pulse signal and the valve operation>
➁ Linear expansion valve operation
➂ Trouble shooting
D
A
E
B
C
Open
Extra tightning (80~100pulse)
Pulse number
2000 pulseOpening a valveall the way
Close
Val
ve p
ositi
on (
capa
city
)
654321
LED1k'
Symptom Check points
Operation circuitfailure of the microprocessor.
Disconnect the connector on the controller board, thenconnect LED for checking.
Pulse signal will be sent out for 10 seconds as soon as themain switch is turn on. If there is LED with lights on or lightsoff, it means the operation circuit is abnormal.
Countermeasures
Exchange the indoorcontroller board at drivecircuit failure.
Linear expansionvalve mechanism islocked.
Valve doesn't closecompletely(thermistor leaking).
Wrong connection ofthe connector orcontact failure.
To check the linear expansion valve, operate the indoor unitin fan mode and at the same time operate other indoor unitsin cooling mode, then check the pipe temperature <liquid
pipe temperature> of the indoor unit by theoutdoor multi controller board operationmonitor. During fan operation, linearexpansion valve is closed completely and ifthere are some leaking, detectingtemperature of the thermistor will go lower.If the detected temperature is much lowerthan the temperature indicated in the
remote controller, it means the valve is not closed all the way.It is not necessary to exchange the linear expansion valve, ifthe leakage is small and not making any trouble.
Thermistor
Linearexpansionvalve
Motor will idle and make ticking noise when motor is operatedwhile the linear expansion valve is locked. This ticking soundis the sign of the abnormality.
Check the color of lead wire and missing terminal of theconnector.
Exchange the linearexpansion valve.
Exchange the linearexpansion valve.
If large amount ofthermistor is leaked,exchange the linearexpansion valve.
Disconnect the connectorat the controller board,then check the continuity.
Measure the resistance between the each coil (red-white,red-orange, brown-yellow, brown-blue) using a tester. It isnormal if the resistance is in the range of 150'+10%.
Short or breakage ofthe motor coil of thelinear expansionvalve.
Closing a valve : 1 → 2 → 3 → 4 → 1Opening a valve : 4 → 3 → 2 → 1 → 4
The output pulse shift in above order.❈ 1. When linear expasion valve operation stops, all output phase
become OFF.2. At phase interruption or when phase does not shift in order,
motor does not rotate smoothly and motor lock, and vibrates.
❈ When the switch is turned on, 2200 pulse closeing valve signalwill be send till it goes to A point in order to define the valveposition.
When the valve move smoothly, there is no noise or vibrationoccurring from the linear expansion valve ; however, when thepulse number moves from E to A or when the valve is locked,more noise can be heard than normal situation.
❈ Noise can be detected by placing the ear against the screwdriver handle while putting the screw driver to the linearexpansion valve.
14
6-2. FUNCTION OF DIPSWITCH
PKFY-P20VAM, PKFY-P25VAM
1
2
3
4
5
6
7
8
9
10
1~4
1
2
3
4
5
6
7
8
9
10
Thermistor<Intake temperature>position
ON OFF
Filter crogging Provide Not provide
Filter sign indication 2,500hr 100hr
Air intake Not effective Not effective
Remote indication switching Thermostat ON signal indication Fan output indication
Humidifier control Fan operation at Heating mode Heat thermostat ON is operating
Low (Note 1) Extra low (Note 1)
Setting air flow (Note 1) Reset to SW1-7
Auto reset function Effective Not effective
Power ON/OFF Effective Not effective
Heat pump/Cool only Cooling only Heat pump
Capacity save Available Not available
Vane Available Not available
Not available Available
Vane holizontal angle First setting First setting
Vane cooling limit angle setting (Note 1) Down A,B,C Down A,B,C
Effective Not effective
Heater 4deg up Not effective Effective
Target Superheat setting temperature 9deg 6deg
Target Sybcool setting temperature 15deg 10deg
ONOFF
1 2 3 4 5 6 7 8 9 10
ONOFF
1 2 3 4 5 6 7 8 9 10
ONOFF
1 2 3 4
ONOFF
1 2 3 4
PKFY-P20VAM
MODEL SW2
PKFY-P25VAM
Address board<At delivery>
Indoor controller board
Indoor controller board
<At delivery>
SW3Functionselection
SW2Capacity
codeswitch
SW1Mode
selection
Switch Pole FunctionOperation by switch
Remarks
Built-in remote controller Indoor unit
Indoor linear expansionvalve opening
(Note 1) SW1-7=OFF, SW1-8=ON→Setting air flow.SW1-7=OFF, SW1-8=ON→Indoor fan stop.
Set while the unit is off.
<At delivery>
Set for each capacity.
Set while the unit is off.
(Note 1) At cooling mode, eachangle can be used only 1hour.
Reading change of LEV openingon reversion of after defrosting
Air flow at heatthermostat OFF
15
0
5
9
4
8 37
2
6
1
SW12
10
0
5
9
4
8 37
2
6
1
SW11
1
0
8
F
7
E
6
D 5C
4
B
3
A
2
9
1
SW14
0
5
9
4
8 37
2
6
1
SW120
5
9
4
8 37
2
6
1
SW11
0
8
F
7
E
6
D 5C
4
B
3
A
2
9
1
SW14
Address board
Address board
Operation by switchSwitch Remarks
<At delivery>
<At delivery>
SW111st digitaddresssettingSW12
2st digitaddresssetting
Rot
ary
switc
h
SW14Connector
No.Setting
SW5 Voltageselection
Rot
ary
switc
h
Address setting should be done when networkremote controller (PAR-F25MA) is being used.
This is the switch to be used when the indoorunit is operated with R2, R3 series outdoorunit as a set.
If the unit is used at the 230V or 240V area,set the voltage to 240V.If the unit is used at the 220V, set the voltageto 220V.
Address can be set while theunit is stopped.
Address board
2
220V 240V<At delivery>
220V 240V
16
9 DISASSEMBLY PROCEDURE
OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS
1. REMOVING THE LOWER SIDE OF THE INDOOR UNIT FROMTHE INSTALLATION PLATE
When there is removing plate(1) Remove the corner box at right lower side of the indoor
unit.(2) Insert the removing plate at the back side of the corner box
to remove the indoor unit.(3) Remove the hook by pulling the lower side of the indoor unit
down as shown in the figure 1.
When there is no removing plate or it can not be used for somereason.(1) Remove the front panel.(2) Insert the screw driver to the corner hole at both left and
right side as shown in the figure 2.(3) Push it up then, pull down the lower side of indoor unit and
remove the hook.
Indoor unitremoving plate
Insertthe edge Pull
PushCorner hole
1 2
Push Down
Be carefulnot to damage the airflow adjustmentplate with thescrew driver.
PKFY-P25VAM Be careful on removing heavy parts.
Figure 1 Figure 2
2. REMOVING THE FRONT PANEL
❈ Before removing the front panel, leave the open space atupper side of air flow adjustment plate approximately 2 to 3cm.
(1) Remove the screw caps then remove the set screws.(Refer to the photo 1)
(2) Remove the left side of the front panel, then right side.(3) After removing the lower side of the front panel a little,
remove it as pulling the upper side toward you.❈ Please pay attention to the nozzle assemble.
INSTALLING THE FRONT PANEL(1) Insert the lower side of the front panel under the air
adjusment plate.(2) Set the upper side of the front panel.(3) Set the lower side of the front panel then fix it with the
screws.(4) Press the area indicated as arrow sign and set it to the air
conditioner unit.
Push4
13
2
Photo 1
Figure 3
Front panel
Set screws
Airflow adjustment plate
17
OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS
3. REMOVING THE INDOOR MICRO CONTROLLER BOARDAND INDOOR POWER BOARD
(1) Remove the front panel (Refer to 2).(2) Remove the electrical box cover (screw 4 ✕ 10)
(Refer to the photo 2).
INDOOR MICRO CONTROLLER BOARD(1) Disconnect the following connectors on the indoor micro
controller board.(connector in front of)
● CN60, CN51, CN3, CN29, CN21● CN42, CN41, CN20
(2) Pull out the indoor micro controller board toward you, then disconnect the rest of connectors.
● CN-53-M, CN35-M (See the photo 3)
INDOOR POWER BOARD(1) Disconnect the following connectors on the indoor power
board.● FAN1, CN-53-P, CN35-P
(2) Remove the screws of the indoor power board, then pull outthe indoor power board toward you. (See the photo 3)
Photo 2Electrical parts box cover
Screw caps
Electrical parts box
Photo 3 Indoor micro controller board
Indoor powerboard
Indoor powerboard
4. REMOVING THE ELECTRICAL PARTS BOX
(1) Remove the front panel (Refer to 2)(2) Remove the electrical parts box cover.(3) Pull the nozzle assemble toward you as opening the catch
of the nozzle assemble.(4) Disconnect the indoor/outdoor connector.(5) Disconnect the following connector on the indoor micro con
troller board. (See the photo 4)● CN60, CN5V, CN33, CN29, CN21, CN20
(6) Remove the connector FAN1 on the indoor power board.(7) Disconnect the ground wire.(8) Pull the disconnected lead wire out from the electrical parts
box.(9) Push up the upper fixture catch to remove the box, then pull
the lower fixture and remove it from the box fixture.
Photo 4Indoor microcontroller board
fixture (upper)
Indoor powerboard
fixture (lower)
Ground wire set screw Electrical parts box
Electrical parts box
18
OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS
5. REMOVING THE NOZZLE ASSEMBLE
(1) Remove the front panel (Refer to 2).(2) Remove the electrical parts box cover.(3) Disconnect the connector (CN5V) on the indoor micro con
troller board.(4) After unhook the right side of the corner box, press the
upper left side and remove the corner box.(5) Remove the nozzle assemble from the fixture.
(See the photo 5)(6) Remove the drain hose.
Photo 5
Heat exchanger Electrical parts box
fixture
Drain hose
6. REMOVING THE LINEFLOW FAN AND THE FAN MOTOR
(1) Remove the front panel (Refer to 2).(2) Remove the nozzle assembling (Refer to 5).(3) Remove the electrical parts box.(4) Remove the fixture while pressing the right side of motor fix
ture catch (See the photo 6).(5) Remove the left side of the motor fixture.(6) Loosen the screw that fixes the line flow fan to the fan
motor, then remove the fan motor by sliding it to the right side.(See the photo 6)
(7) Pull the left-hand side of the heat exchanger toward you.(See the photo 7)
(8) Remove the lineflow fan.
Photo 6Heat exchanger Fan motor
Photo 7 Heat exchanger
7. REMOVING THE VANE MOTOR
(1) Remove the front panel.(2) Remove the screw of the electrical parts box cover, and
remove the cover.(3) Remove the screw of the vane motor, and remove the motor
from the shaft.(4) Disconnect the vane motor connector (CN5V) on the indoor
controller board.
Photo 8Heat exchanger
Vane motor
Nozzle assemble
8. REMOVING THE LIQUID PIPE THERMISTOR AND GASPIPE THERMISTOR
(1) Remove the front panel (Refer to 2).(2) Remove the electrical box cover.(3) Remove the pipe cover.(4) Cut the wiring fixed band.(5) Remove the liquid pipe thermistor and gas pipe thermistor.
(See the photo 9)(6) Disconnect the connector (N29) (CN21) on the indoor micro
controller board.
Photo 9Heat exchanger
Drain hose
fixture set screwset screws
Drain hoseNozzle assemble
fixture (left)
Nozzle assemble
fixture
Line flow fan
Heat exchangerfixture (left)
Vane motor connect screw
Liquid pipethermistor
Gas pipe thermistor
Electrical parts box
fixture (right)
19
PARTS LIST10
PANEL PARTSPKFY-P20VAMPKFY-P25VAM
1
2
3
4
5
6
7
8
9
10
FRONT PANEL
INTAKE GRILLE
RECEVING COVER
AIR FILTER
BOX
CORNER BOX
BACK PLATE
SCREW CAP
GRILLE CATCH
BRAND LABEL
No. Parts No. Parts Name Specifications PKFY-P20VAMPKFY-P25VAM
Remarks(Drawing No.)
WiringDiagramSymbol
Recom-mended
Q'tyUnit Amount
Q'ty / set Price
1
1
1
1
1
1
1
1
1
1
(DT25C174H03)
3PCS/SET
(BC79R798H02)
R01 22A 651
R01 22A 691
—
R01 22A 500
R01 22A 635
T7W A00 658
R01 22A 808
R01 22A 096
R01 22A 054
—
20
ELECTRICAL PARTSPKFY-P20VAM,PKFY-P25VAM
1
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
21
22
23
24
NOZZLE
AUTO VANE
DRAIN HOSE
FAN MOTOR
RUBBER MOUNT
BEARING MOUNT
SLEEVE BEARING
INDOOR CONTROLLER BOARD
POWER BOARD
ELECTRICAL BOX
ELECTRICAL BOX
TERMINAL BLOCK
TERMINAL BLOCK
ROOM TEMPERATURE THERMISTOR
LIQUID PIPE THERMISTOR
VANE MOTOR
LINEFLOW FAN
FUSE
ADDRESS BOARD
MOTOR BAND
GAS PIPE THERMISTOR
REMOTE CONTROLLER
COARD REMOCON
CONTROLLER COVER
FAN GUARD
RC4V17-AA
2P (M1, M2)
3P (L, N, ;)
250V 6.3A
PAR-F25MA
10m
No. Parts No. Parts Name Specifications PKFY-P25VAM
PKFY-P20VAM
Remarks(Drawing No.)
WiringDiagramSymbol
Recom-mended
Q'tyUnit Amount
Q'ty / set Price
MF
M.B
P.B
TB2
TB5
TH21
TH22
MV
FUSE
A.B
TH23
R.B
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
(BG00N801B33)
(BG00N801B34)
(BG00G828G04)
R01 22A 530
R01 22A 002
R01 22A 527
T7W A00 762
R01 22A 105
R01 22A 102
R01 005 103
R01 99W 310
T7W B02 313
—
—
T7W A10 716
T7W A11 716
R01 93W 202
R01 22A 202
R01 22A 223
R01 22A 114
T7W 520 239
T7W B01 294
R01 22A 126
R01 99W 202
T7W B00 713
T7W A00 305
—
T7W B00 675
10
FILTER
CHECK MODE
TEST RUN
22
21
20
1
24
21
HEAT EXCHANGER PARTSPKFY-P20VAMPKFY-P25VAM
1
1
1
1
1
1
1
2
3
HEAT EXCHANGER
HEAT EXCHANGER
CONNECT PIPE
LINEAR EXPANSION VALVE
No. Parts No. Parts Name Specifications PKFY-P20VAM
PKFY-P25VAM
Remarks(Drawing No.)
WiringDiagramSymbol
Recom-mended
Q'tyUnit Amount
Q'ty / set Price
LEV
R01 99W 480
R01 00Y 480
R01 99W 470
R01 22A 401
cCopyright 1998 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.Issued in Jun. 1998. No. OC163 564 Printed in Japan
HEAD OFFICE MISTUBISHI DENKI BLDG.MARUNOUCHI TOKYO100 TELEX J24532 CABLE MELCO TOKYO
New publication, effective Jun. 1998Specifications subject to change without notice