Mitsubishi Electric PKFY-P20VAM-E Operating manual

TECHNICAL & SERVICE MANUAL
CONTENTS
1. SAFETY PRECAUTION ·····················2
2. PART NAMES AND FUNCTIONS······6
3. SPECIFICATION·································8
4. OUTLINES AND DIMENSIONS ·······10
5. WIRING DIAGRAM···························11
6. REFRIGERANT SYSTEM DIAGRAM···12
7. TROUBLESHOOTING······················12
8. DISASSEMBLY PROCEDURE·········19
9. PARTS LIST ·····································22
Indoor unit
[Model names] [Service Ref.]
PKFY-P20VAM-E PKFY-P20VAM-E
PKFY-P25VAM-E PKFY-P25VAM-E
No. OC309
Wall Mounted
Series PKFY
INDOOR UNIT
2004
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R407C R22
R410A
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1SAFETY PRECAUTION
[2] 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.
[1] Cautions for 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.
Cautions for units utilizing refrigerant R407C
CAUTIONS RELATED TO NEW 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.
Use ESTR , ETHER or HAB as the lubricant to
coat flares and flange connection parts.
If large amount of mineral oil enter, that can cause
deterioration of refrigerant oil etc.
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.
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. Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Gravimeter
Unit
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[3] 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.
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Cautions for units utilizing refrigerant R410A
Store the piping to be used during installation
indoors and keep both ends of the piping sealed
until just before brazing. (Leave elbow joints, etc.
in their packaging.)
Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.
Charge refrigerant from liquid phase of gas
cylinder.
If the refrigerant is charged from gas phase, composition
change may occur in refrigerant and the efficiency will be
lowered.
Do not use refrigerant other than R410A.
If other refrigerant (R22 etc.) is used, chlorine in refrige-
rant can cause deterioration of refrigerant oil etc.
Use a vacuum pump with a reverse flow check
valve.
Vacuum pump oil may flow back into refrigerant cycle and
that can cause deterioration of refrigerant oil etc.
Use the following tools specifically designed for
use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Keep the tools with care.
If dirt, dust or moisture enter into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigera-
nt will change and the efficiency will be lowered.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
If dirt, dust or moisture enter into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enter, that can cause deterio-
ration of refrigerant oil etc.
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.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
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[1] Cautions for service
(1) Perform service after collecting the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.
[2] Additional refrigerant charge
When charging directly from cylinder
· Check that cylinder for R410A on the market is syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Specifications
1Gauge manifold ·Only for R410A
·Use the existing fitting specifications. (UNF1/2)
·Use high-tension side pressure of 5.3MPa·G or over.
2Charge hose ·Only for R410A
·Use pressure performance of 5.09MPa·G or over.
3Electronic scale
4Gas leak detector ·Use the detector for R134a, R407C or R410A.
5Adaptor for reverse flow check ·Attach on vacuum pump.
6Refrigerant charge base
7Refrigerant cylinder ·Only for R410A Top of cylinder (Pink)
Cylinder with syphon
8Refrigerant recovery equipment
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2PART NAMES AND FUNCTIONS
● Indoor Unit
PKFY-P20VAM-E
PKFY-P25VAM-E
● 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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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 but power is 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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3SPECIFICATION
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-E
2.2
2.5
PKFY-P25VAM-E
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 (JIS B 8615-1)
Cooling :Indoor D.B. 27°C W.B. 19°C
Outdoor D.B. 35°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 – Middium1 – Middium2 – Low.
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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:/5.4k", 30:/4.3k", 40:/3.0k"
Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.4k", 30:/4.3k", 40:/3.0k"
Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.4k", 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-E PKFY-P25VAM-E
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)
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4OUTLINES AND DIMENSIONS
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 MA remote controller of indoor controller board. : There is no terminal board for MAremote controller.
Air intake dimension
PKFY-P20VAM-E
PKFY-P25VAM-E
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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