Mitsubishi Electric PKFY Series Operating manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. SAFETY PRECAUTION ·····················3
2. PART NAMES AND FUNCTIONS······5
3. SPECIFICATION·································7
4. OUTLINES AND DIMENSIONS ·········9
5. WIRING DIAGRAM···························10
6. REFRIGERANT SYSTEM DIAGRAM···11
7. TROUBLESHOOTING······················12
8. DISASSEMBLY PROCEDURE·········17
9. PARTS LIST ·····································20
Indoor unit
[Model names] [Service Ref.]
PKFY-P20VAM-A PKFY-P20VAM-A
PKFY-P25VAM-A PKFY-P25VAM-A
No. OC254
2001
Wall Mounted
Series PKFY
INDOOR UNIT
R407C R22
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3
SAFETY PRECAUTION
1
Cautions for using with the outdoor unit which adopts R407C refrigerant.
· Do not use the existing refrigerant piping.
-The old refrigerant and lubricant in the existing piping contains a large amount of chlorine which may cause the lubricant
deterioration of the new unit.
· Use “low residual oil piping”.
-If there is a large amount of residual oil (hydraulic oil, etc.) inside the piping and joints, deterioration of the lubricant will result.
· Store the piping to be used during installation indoors with keep both ends 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 ESTR , ETHER or HAB as the lubricant to coat flares and flange connection parts.
Use liquid refrigerant to seal the system.
-If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance
may drop.
· Do not use a refrigerant other than R407C.
-If another refrigerant (R22, etc.) is used, the chlorine in the refrigerant may cause the lubricant deterioration.
· Use a vacuum pump with a reverse flow check valve.
-The vacuum pump oil may flow back into the refrigerant cycle and cause the lubricant deterioration.
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4
[3] Refrigerant recharging
(1) Refrigerant recharging process
1Direct charging from the cylinder.
·R407C cylinder are available on the market has a syphon pipe.
·Leave the syphon pipe cylinder standing and recharge it.
(By liquid refrigerant)
(2) Recharge in refrigerant leakage case
·After recovering the all refrigerant in the unit, proceed to working.
·Do not release the refrigerant in the air.
·After completing the repair service, recharge the cycle with the specified amount of
liquid refrigerant.
Gravimeter
Unit
[1] Service tools
Use the below service tools as exclusive tools for R407C refrigerant.
No. Tool name Specifications
1Gauge manifold ·Only for R407C.
·Use the existing fitting SPECIFICATIONS. (UNF7/16)
·Use high-tension side pressure of 3.43MPa·G or over.
2Charge hose ·Only for R407C.
·Use pressure performance of 5.10MPa·G or over.
3Electronic scale
4Gas leak detector ·Use the detector for R134a or R407C.
5Adapter for reverse flow check. ·Attach on vacuum pump.
6Refrigerant charge base.
7Refrigerant cylinder. ·For R407C ·Top of cylinder (Brown)
·Cylinder with syphon
8Refrigerant recovery equipment.
[2] Notice on repair service
·After recovering the all refrigerant in the unit, proceed to working.
·Do not release refrigerant in the air.
·After completing the repair service, recharge the cycle with the specified amount of
liquid refrigerant.
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5
PART NAMES AND FUNCTIONS
2
● Indoor Unit
PKFY-P20VAM-A
PKFY-P25VAM-A
● MA remote controller [PAR-20MAA]
● Once the operation of the unit is set, subsequent operations can only be performed by pressing the ON/OFF button
repeatedly.
● Operation buttons
Air intake grille Air intake
Guide vane Air Outlet
Auto Vane
Filter
PAR-20MAA
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCK
ON OFF
˚C
CHECK
CHECK MODE
FILTER
TEST RUN
FUNCTION
˚C
1Hr.
NOT AVAILABLE
STAND BY
DEFROST
FILTER
CHECK TEST
TEMP.
TIMER SET
Press this button to switch the cooler,
electronic dry (dehumidify), automatic
and heater modes.
OPERATION SWITCH button
This sets the room temperature. The
temperature setting can be performed
in 1:units
Setting range
Cooler 19:to 30:
Heater 17:to 28:
TEMP. ADJUSTMENT button
This switches between continuous
operation and the timer operation.
TIMER button
This switches between the operation
and stop modes each time it is pressed.
The lamp on this button lights during
operation.
ON/OFF button
Only press this button to perform an
inspection check or test operation.
Do not use it for normal operation.
CHECK-TEST RUN button
This switch the horizontal fan motion
ON and OFF.
(Not available for this model.)
LOUVER button
This adjusts the vertical angle of the
ventilation.
AIR DIRECTION button
This resets the filter service indication
display
FILTER button
This sets the current time, start time
and stop time.
TIME SETTING button
This sets the ventilation fan speed.
AIR SPEED button
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6
PAR-20MAA
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCK
ON OFF
˚C
CHECK
CHECK MODE
FILTER
TEST RUN
FUNCTION
˚C
1Hr.
NOT AVAILABLE
STAND BY
DEFROST
FILTER
CHECK TEST
TEMP.
TIMER SET
Caution
●Only the Power display lights when the unit is stopped and power supplied to the unit.
●When the central control remote control unit, which is sold separately, is used the ON-OFF button, operation switch button
and TEMP. adjustment button do not operate.
●“NOT AVAILABLE” is displayed when the Air speed button are pressed.This indicates that this room unit is not equipped
with the fan direction adjustment function and the louver function.
●When power is turned ON for the first time, it is normal that “H0” is displayed on the room temperature indication (For max.
2minutes). Please wait until this “H0” 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 continuous
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
The [STANDBY] symbol is only dis-
played from the time the heating
operation starts unit the heated air
begins to blow.
DEFROST display
This indicates when the defrost
operation 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 ten second
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 a malfunction 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
display range is 8°C to 39°C. The
display flashes 8°C when the actual
temperature is less than 8°C and
flashes 39°C when the actual tem-
perature is greater than 39°C.
display
This display lights in the check
mode or when a test operation is
performed.
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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7
SPECIFICATION
3
3-1. Specification
Power Supply
Starting Current
Fan ✕No.
Air flow w2
External static pressure
Fan motor output
Item
Power
Cooling capacity
Heating capacity
Exterior <munsell symbol>
Out dimensions
Heat exchanger
Fan
Insulator
Air filter
Pipe dimensions
Unit drain pipe size
Noise level w2
Product weight
Unit
[,V,Hz
kW
kW
kW
kW
A
A
—
mm
mm
mm
—
—
K/min
Pa
kW
—
—
[mm(in.)
[mm(in.)
[mm
dB
kg
Cooling
Heating
Cooling
Heating
Height
Width
Depth
Gas side
Liquid side
PKFY-P20VAM-A
2.2
2.5
PKFY-P25VAM-A
2.8
3.2
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 (1/2")
6.35 (1/4")
PVC pipe VP-16 connectable (I.D. 16)
36-35-33-32
8.5
Electric
characteristic
Single phase, 220-230-240V, 50Hz
Single phase, 220V, 60Hz
Note 1. Rating conditions
Cooling :Indoor D.B. 27°C W.B. 19.0°C
Outdoor D.B. 35°C W.B. 24°C
Heating : Indoor D.B. 20°C
Outdoor D.B. 7°C W.B. 6°C
ww2. Air flow and the noise level are indicated as High-Middium 1-Middium2-Low.
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8
3-2. Electrical parts specifications
Parts name
Model Symbol
TH21
TH22
TH23
FUSE
MF
C1
MV
LEV
TB2
TB5
Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.2k", 30:/4.3k", 40:/3.0k"
Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.2k", 30:/4.3k", 40:/3.0k"
Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.2k", 30:/4.3k", 40:/3.0k"
250V 6.3A
4-Pole Output 17W / RC4V17
1.5µF ✕440V
MSFBC20A76 DC12V
(L, N, ;) 250V 20A
(M1, M2) 250V 10A
Liquid pipe thermistor
Gas pipe thermistor
Fan motor capacitor
Linear expansion valve
PKFY-P20VAM-A PKFY-P25VAM-A
Room temperature
thermistor
Fuse
(Indoor controller board)
Fan motor
(with thermal fuse)
Vane motor
(with limit switch)
Power supply terminal
block
Transmission terminal
block
DC12V Stepping motor drive
Port [3.2 (0~2000pulse) EDM-402ME
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9
OUTLINES AND DIMENSIONS
4
Unit : mm
783
C
D
B
CBA
D
25.513
Air intake dimension
Air intake dimension
Air outlet dimension
Drain pipe length
Gas pipe
Detail of Terminal block
Terminal block for transmission
Terminal block for transmission Terminal block for power supply Address board
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
450
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
2.5 60
13
Detail of knock out hole (A B C)
Secondary
Primary
Knock out hole for the remote controller wiring
Knock out hole for the remote controller wiring
: In case of connecting MA remote controller, use the cable with the connector attached to the indoor unit. Please connect the cable with the connector with the lead wire and connector (Relay connector) for the MAremote controller of indoor controller board. : There is no terminal board for MAremote controller.
Air intake dimension
PKFY-P20VAM-A
PKFY-P25VAM-A
A
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
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
Gas pipe
Refrigerant pipe
Address board is protected by the plastic cover. For the setting, remark 1-screw using the screw driver.
Installation plate
Air outlet angle
Air outlet dimension
Air outlet direction
Detail of address board
Dip switch
Terminal block
158
70.3
37.4
5
80
4- 9
12- 2.8 87- 5.1 65
17
3
1
1
Note1. For the installation, be sure to leave some space in case there is fringe at edge of the ceiling. Note2. Use the M10 or W3/8 bolt for the installation plate. Note3. Refer for the specification table it below .
Connection inner dimension [16
Lotary switch(part No.)
Lotary switch(self address)
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
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10
5 WIRING DIAGRAM
12
to the connector . (Remote controller wire is non-polar.)
TB5
TB2
N
L
TO NEXT
INDOOR UNIT
PULL
BOX
FUSE
(15A)
~/N 220V 60Hz
~/N 220-230-240V 50Hz
BREAKER
(15A)
POWER SUPPLY
GRN/YLW
ORN
ORN
PKFY-P20VAM
Models
OFF
ON Models SW2
<w1>
SW2
PKFY-P25VAM
4321 4321
OFF
ON
Mark
LED1
LED2
Meaning
Main power supply
Function
Power supply for
MA-Remote controller
LED on indoor board for service
Main power supply(Indoor unit:220-230-240V)
power on lamp is lit
Power supply for MA-Remote controller
on lamp is lit
3.In case of using M-NET, please connect to TB5.(Transmission line is non-polar.)
In case of connecting MA-remote controller, please connect MA remote controller cable in an accessorie2.
CN35P
MICON
BOARD
(BLU)
CN53P
MICON
BOARD
(RED)
(BLU)
(RED)
POWER BOARD
POWER BOARD
CN53M
CN35M
CN43
ADDRESS
(RED)
(RED)
ADDRESS
CN82
SW5
220V 240V
3RD
DIGIT 2ND DIGIT 1ST DIGIT CONNECTION
NO.
See fig: w1
(WHT)
CENTRALLY
CONTROL (GRN)
REMOTE
INDICATION (RED)
ADDRESS (RED)
ADDRESS (BLU) CN20
INTAKE
(RED)
(BLU)
(GRN)
(RED)
BLU RED
BLK
RED WHT BLU
BLU
M-NET REMOTE CONTROLLER
TO OUTDOOR UNIT
BC CONTROLLER
CONTROLLER
TO MA-REMOTE
LIQUID
(WHT)
(BLK)
GAS
(GRN)
PNK
YLW
ORN
BLU
RED
SWITCH
(WHT)
(WHT)
(WHT)
RED
WHT
YLW
ORN
BLU
BRN
6.
5.
4.
1. Note
The setting of the SW2 dip switches differs in the capacity. For the detail,refer to the fig: w1.
Symbols used in wiring diagram above are, : terminal block, : connecter.
At servicing for outdoor unit, always follow the wiring diagram of outdoor unit.
Please set the switch SW5 according to the power supply voltage.
Set 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.
block
Terminal
Switch
Circuit board
Power supply
Transmission
Address board
Mode selection
Address setting 1st digit
Connection No.
Address setting 2nd digit
Name
Voltage selection
Vane motorMV
Fan motor
(0:/15T,25:/5.4T)TB5
TB2
SW14<A.B>
SW12<A.B>
SW11<A.B>
SW1<A.B>
A.B
Pipe temperature,detection/Gas
Capacitor(fan motor)C1
MF
TH23 Thermistor
SW3
SW2 Switch
CN52
CN51
CN41
CN32 Indoor controller board
NameSymbol
M.B
Legend
Connector Remote switch
HA terminal-A
Centrally control
Remote indication
Mode selection
Capacity code
P.B Indoor power board
Symbol Name Symbol
ZNR Varistor
Fuse (6.3A)FUSE Fan phase controlF.C
(0:/15T,25:/5.4T)
Pipe temperature,detection/liquid
(0:/15T,25:/5.4T)
Room temperature,detection Thermistor
TH21
TH22 Linear expansion valveLEV
SW5<A.B>
CN5V
(BLU) CN41
HA REMOTE
CN32 CN34 CN29
LEV
CN60
CN3A
CN81CN42
CN52CN51
12345678910
SW3
0FF
0N
1234
SW2
LED2
M.B
CN21
CN2M
M-NET
FAN
CND
C1
FUSE
250V
6.3A
8
4
ON
OFF 12345678910
SW1
SW12 SW11 SW14
A.B
00 0
LED1
TH22TH23 TH21
5
MF
M1M2
DC24-30V
DC8.7-13V
{
P.B
ZNR
F.C
MV
{
21
LEV 6
654321 12345 4321 123 123 1 2 21
32145 32145 4123 612345 78 31 12
13245
123
1
2
3
4
5
6
7
8
1
2
3
4
5
4
2
3
1
321
12 146 13
1
2
3
4
5
6
1
2
3
4
5
PKFY-P20VAM-A
PKFY-P25VAM-A
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