Mitsubishi Electric PKFY-20VAM Operating manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
CONTENTS
1. PART NAMES AND FUNCTIONS········2
2. SPECIFICATION···································4
3. OUTLINES AND DIMENSIONS············6
4. WIRING DIAGRAM·······························7
5. REFRIGERANT SYSTEM DIAGRAM ··8
6. TROUBLESHOOTING··························9
7. DISASSEMBLY PROCEDURE···········14
8. PARTS LIST········································17
<Indoor unit>
PKFY-20VAM
PKFY-25VAM
No. OC112
1997
Models
Wall Mounted
Series PKFY
INDOOR UNIT
MODEL NAME
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2
PART NAMES AND FUNCTIONS
1
● Indoor Unit
● 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 continuous
operation and the timer operation
AIR SPEED button
The sets the ventilation fan speed.
● Operation buttons
TIMER SETTING button
This sets or switches the current
time, start time and stop time.
OPERATION SWITCH button
Press this button to switch the cooler
electronic dry (denumidity), automat-
ic and heater modes.
TEMP ADJUSTMENT button
This sets the room temperature. The
temperature setting can be per-
formed in 1°C units.
Setting range :
Cooler 19°C to 30°C
Heater 17°C to 28°C
CHECK-TEST RUN button
Only press this button to perform an
inspection check or test operation.
Do not use it for nomal operation
FILTER button
This resets the filter service indica-
tion display
AIR DIRECTION button
This adjusts the vertical angle of the
ventilation.
ON/OFF button
This switches between the operation
and stop modes each time it is
pressed. The lamp on this button
lights during operation.
The model name of the remote con-
troller is indicated.
LOUVER button
This switches the horizontal fan
motion ON and OFF.
(This button does not operate in this
model.)
Air intake grille Air intake
Guide vane Air Outlet
Aute Vane
Filter
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3
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.
CENTRALLY
CONTROLLED display
This indicates when the unit is con-
trolled by optional features such as
central control type remote controller.
TIMER display
This indicates when the continous
operation and time operation modes
are set.
It also display the time for the timer
operation at the same time as when
it is set.
OPERATION MODE display
This indicates the operation mode.
STANDBY display
This indicates when the standby
mode is set from the time the sleep
operation starts until the heating air
is discharged.
DEFROST display
This indicates when the defrost oper-
ation is performed.
CHECK display
This indicates when a malfunction
has occurred in the unit which should
be checked.
CLOCK display
The current time , start time and stop
time can be displayed in tensecond
intervals by pressing the time switch
button. The start time or stop time is
always displayed during the timer
operation.
●Display
In this display example on the bot-
tom left, a condition where all dis-
play lamps light is shown for expla-
nation purposes although this differs
from actual operation.
Operation lamp
This lamp lights during operation,
goes off when the unit stops and
flashes when amalfunction occurs.
POWER display
This lamp lights when electricity is
supplied to the unit.
SET TEMPERATURE display
This displays the selected setting
temperature.
AIR DIRECTION display
This displays the air direction.
ROOM TEMPERATURE display
The temperature of the suction air is
displayed during operation. The dis-
play range is 8° to 39°C. The display
flashes 8°C when the actual temper-
ature is less than 8° and flashes
39°C when the actual temperature is
greater than 39°C.
display
This display lights in the check mode
or when a test operation is per-
formed.
CHECK MODE
TEST RUN
This lamp lights when the filter need
to be cleaned.
AIR SPEED display
The selected fan speed is displayed.
FILTER display
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4
2SPECIFICATION
2-1 Specification
Power Supply
Starting Current
Fanx No.
Air flow Note2
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-20VAM
2000
2250
PKFY-25VAM
2500
2800
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
Electric
characteristic
Note 1. Rating conditions (JIS B8616)
Cooling :Indoor 27°C DB. 19.5°C WB
Outdoor 35°C DB. 24°C WB
Heating : Indoor 20°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.
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5
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
MF1,2
C1
MV
LEV
TB2
TB5
(Primary) 50/60Hz 220-240V (Secondry) (18.4V 1.2A)
Resistance:
0¡C / 15k½, 10¡C / 9.6k½, 20¡C / 6.3k½, 25¡C / 5.4k½, 30¡C / 4.3k½, 40¡C / 3.0k½
Resistance:
0¡C/15k½, 10¡C/9.6k½, 20¡C/6.3k½, 25¡C/5.4k½, 30¡C/4.3k½, 40¡C/3.0k½
250V 6.3A
4-Pole Output 17W / RC4V17
1.5µF ✕440V
MSFBC20A76 DC12V
DC12V Stepping motor drive
Port [3.2 (0~2000pulse) EDM-402ME
(L, N, ;) 264V 20A
(M1, M2,S ) 250V 10A
PKFY-20VAM/PKFY-25VAM
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6
3OUTLINES AND DIMENSIONS
Unit : mm
783
C
D
A
B
C B A D
25.5
159
407.5
328328
298
235
235
205
205
175
175
170
170
10
10
0
298
407.5
168 135 125 110 35 10 27.5 40 53 65 87 113 128 0
295
260
260
225
225
190
190
180
159
155
155
120
120
85
85
30
30
45
44 50
0
133
122.5
97.5
85 60
47.5 22.5
15 90
102.5
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 intake Installation plate
Knock out hole
Installation space
100 or more
20 or more
20 or more
130 or more
Address board
Drain pipe
Liquid pipe Flare connection 1/4F
Flare connection 1/2F
Insulation out dimention 28
Insulation Out dimention 35 Gas pipe
Refrigrant pipe
Address board is protected by the plastic cover. For the setting, remark 1-screw using the screw driver.
Installation plate
Air intake dimension
Air intake dimension
Air outlet dimension
Drain pipe length
Gas pipe
Detail of Terminal block
Terminal block for remote controller
Terminal block for remote controller Terminal block for power supply address board
Air outlet angle
Air outlet dimention
Air outlet direction
Detail of address board
Dip swich
Terminal block
Terminal block for power supply
Knock out hole for right - hand side piping
Knock out hole for left - hand side piping
Knock out hole for under piping
Liquid pipe
815
630 695
660
450
520
54
50
16
45 91.5 10 34
2.5
2.5 16
4 50
10
45
5
45
3
R15
R15
R15
R12
R8
R8
R8
10
24.4
116
110
60
146
295
21.5
247.5
150 158
70.3
37.4
5
2.5 60
13
80
4- 9
12- 2.8 87- 5.1 65
17
3
1
1
Note1.For the instalation, be sure to leave some space in case there is finge at edge of the celing. Note2. Use the M10 or W3/8 bolt for the istallation plate. Note3. Refer for the specification table it below .
Detail of knock out hole (A B C)
Connection out dimention 28
Lotary switch(part No.)
Lotary switch(self address)
Secondry
Primary
Knock out hole for the remote controller wiring
Knock out hole for the remote controller wiring
Control wire (30v)
: Follow the instruction stated at Note3 for the connection with the control wire. : There is no terminal board for contlroller.
54 or more for left
or left back piping
Unit transplant parts
pipe hole
Position detail of the tapping screw and bats at pipe intake
Center of gravity hole for installation
Air intake dimention
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7
WIRING DIAGRAM4
MODELS : PKFY-20VAM, PKFY-25VAM
Legend
Symbol Name
TH23 Gas pipe thermistor
(0°C / 15kΩ, 25°C / 5.4kΩ)
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
TH21 Room temperature thermistor
(0°C / 15kΩ, 25°C / 5.4kΩ)
TH22 Liquid pipe thermistor.
(0°C / 15kΩ, 25°C / 5.4kΩ)
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 NEXT
INDOOR UNIT
PULL
BOX
FUSE
(15A)
BREAKER
(15A)
AC220-240V
SW5
220V 240V
BLU
RED
BLU BLU
WHT
BLK RED BLU
00
M2
M1 REMOTE CONTROLLER
DC24-30V
{
BC CONTROLLER
T O OUTDOOR UNIT
S(SHIELD)
GRN/YEL
~/N 220-240VA@50Hz
POWER SUPPLY
N
TB2
L
MICON
BOARD
(WHT)
POWER BOARD
ADDRESS
(RED)
(WHT)
REMOTE
INDICATION
CONNECTION
NO.
1ST
DIGIT
2ND
DIGIT
3RD
DIGIT
ADDRESS
(RED)
F.C ZNR
3
1
P.B
See fig:❈1
BLU
YEL
ORN
PNK
WHT
YEL
MF
5
TH21TH23 TH22
LEV ORN
BLU
RED
RED
BRN
MV
LED5
0
A.B
SW14
SW11SW12
SW1
10987654321
OFF
ON 1
1
8
(RED)
ADDRESS
CN43
CN82
44
8
6.3A
250V
FUSE
AC18.4V
T
C1
CND
(RED)
(GRN)
FAN1 12
1 3 5
1 2
(BLU)
M-NET
CN2M
1 2
LIQUID
CN21
CN53-P
MICON
BOARD
CN35-P
1
5
M.B
POWER BOARD
CN53-M 1 5
3
CN35-M 1
LED4 LED3 LED2 LED1
SW2
4321
0N
0FF
SW3
10987654321
5
1
CENTRALLY
CONTROL
CN51
54
11
(WHT)
CN52 CN42
(RED)
ADDRESS
18
CN81
(RED)
INTAKE
CN20
21
(WHT)
CN60
LEV (BLK)
GAS
CN29
(GRN)
REVOLUTION
CN33
2
61 1
6
123
CN32
REMOTE
SWITCH
(WHT)
123
1 2 3 4
HA
CN41
(WHT)
(BLU)
CN5V
51
TB5
Note
1. 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.
[
ON
OFF 1234
MODELS SW2
PKFY-20VAM ON
OFF 1234
MODELS SW2
PKFY-25VAM
<❈1>
BG79N652H01
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8
5REFRIGERANT SYSTEM DIAGRAM
Strainer
(#100mesh)
Strainer
(#50mesh)
Heat exchanger
Room temperature thermistor
TH21
Gas pipe thermistor
TH23
Liquid pipe thermistor
TH22
Gas pipe
Flare
Linear expansion
valve
Gas pipe
PKFY-20VAM, PKFY-25VAM
{12.7 <1/2F>
Liquid pipe {6.35 <1/4F>
Models
Item
Refrigeration pipe size (Flare connection size)
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9
6TROUBLESHOOTING
6-1. How to check
Room temperature
thermistor(TH21)
Liquid pipe
thermistor(TH22)
Gas pipe
thermistor(TH23)
Vane motor
Fan motor
Linear expansion
valve
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 Abnormal
White-Black 195'Open or short
Red-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 fan
motor has the defects.
200'
Normal
(1)-(5)
White-Red 150'±10%
Abnormal
Open or short
(2)-(6)
Yellow- Blown (3)-(5) Orange-Red (4)-(6) Blue-Brown
Normal
(1)-(2)
Red-Pink 400'±7%
Abnormal
Open or short
(1)-(3)
Red-Blue
(1)-(4)
red-Orange (1)-(5) Red-Yellow
White
Red
Black
Brown Blown Yellow
CN33
1
4
6
3 2 1
FAN1
1
2
3
4
5
6
LEV
White
Yellow
Orange
Blue
Red
Brown
CN60
2Without disassembling the parts, measure the electrical pressure of the gray wire(Signel line) and
brown wire (GND) While the power is on.
1Measure the resistance between the terminals using a tester.(Surrounding tempreture 25:.)
Normal
4.3k'~9.6k'
Abnormal
Open or short
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10
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
< Thermistor for lower temperature >
Temperature (:)
Resistance (K")
4[4
3
62
5
[3
2[2
1[1
[4
[3
[2
[1
Controller board
Drive circuit
Relay connector
Connector(CN60)
DC12V
Brown
Red
Blue
Orange
Yellow
White
5
1
3
4
6
M
4
6
2
3
5
1
Blue
Brown
Yellow
Orange
Red
White
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
①Operation 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>
1
273+t 1
273
Note : Since the number of the connector at the controller board side and the relay connector are different, follow the color of
the lead wire.
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