Mitsubishi Electric PLFY-P20VCM-E Operating manual

TECHNICAL & SERVICE MANUAL
Indoor unit
[Model names] [Service Ref.]
PLFY-P20VCM-E PLFY-P20VCM-E.TH
PLFY-P25VCM-E PLFY-P25VCM-E.TH
PLFY-P32VCM-E PLFY-P32VCM-E.TH
PLFY-P40VCM-E PLFY-P40VCM-E.TH
No. OC314
INDOOR UNIT
Ceiling Cassettes
CONTENTS
1. SAFETY PRECAUTION··························2
2. PART NAMES AND FUNCTIONS··········6
3. SPECIFICATIONS···································8
4. 4-WAY AIR FLOW SYSTEM·················10
5. OUTLINES AND DIMENSIONS············12
6. WIRING DIAGRAM·······························13
7. REFRIGERANT SYSTEM DIAGRAM ·····14
8. DISASSEMBLY PROCEDURE·············15
9. TROUBLE SHOOTING·························18
10. PARTS LIST··········································25
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R407C R22
R410A
Model name
indication
Series PLFY
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1SAFETY PRECAUTION
[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 charge 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.
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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.
[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.
Gravimeter
Unit
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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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Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.
Grille
Filter
Remove dust and pollutants
from inhaled air
Horizontal Air Outlet
Sets airflow horizontal automatically
during cooling or dehumidifying.
Air Intake
Inhales air from room.
2PART NAMES AND FUNCTIONS
● Indoor Unit
[PAR-20MAA]
● Once the controls are set, the same operation mode can
be repeated by simply pressing the ON/OFF button.
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 between
cool,
dry, automatic and heat 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
● Remote controller
● Operation buttons
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Caution
●Only the Power display lights when the unit is stopped and power supplied to the unit.
●“NOT AVAILABLE” is displayed when the Air speed button is 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 until 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
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
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SPECIFICATION
3-1. Specifications
3SPECIFICATIONS
Item
kW
kW
kW
kW
A
A
—
mm
mm
mm
—
—
k/min
Pa
kW
—
—
[mm(in.)
[mm(in.)
[mm
dB
kg
Cooling capacity
Power
Heat exchanger
Insulator
Air filter
Fan ✕No
Air flow W3
Pipe
dimensions
Unit drain pipe size
Noise level W3
Product weight
Exterior
(munsell symbol)
Fan motor
output
External
static pressure
Liquid
side
Gas
side
Heating capacity
F
a
n
Dimensions
Height
Width
Depth
Electric characteristic
Input
Cooling
Heating
Cooling
Heating
Current
PLFY-P25VCM-E.TH PLFY-P32VCM-E.TH
PLFY-P20VCM-E.TH PLFY-P40VCM-E.TH
2.2
2.5
0.011
35-31-28 37-31-29 38-33-29 39-34-30
0.015 0.020
10-9-8
Unit : Galvanized sheets with gray heat insulation Grills : ABS resin Munsell<0.70Y 8.59/0.97>
208 <20>
570<650>
570<650>
Cross fin
Turbo fan ✕1
0
Polyethylene sheet
PP honey comb fabric
O.D.32 (PVC pipe VP-25 connectable)
Single phase 220-230-240V 50Hz
V·Hz
2.8
3.2
3.6
4.0
4.5
5.0
0.06
0.06
0.28
0.28
0.05
0.05
0.23
0.23
11-10-9
[12.7(1/2")
[6.35(1/4")
17<3>15.5<3>
Note 1. Rating conditions(JIS B 8616)
Cooling : Indoor : D.B. 27°C W.B. 19.0°C
outdoor : D.B. 35°C
Heating : Indoor : D.B. 20°C
outdoor : D.B. 7°C W.B. 6°C
Note 2. The number indicated in < > is just for the grille.
W3. Air flow and the noise level are indicated as High-Medium-Low.
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3-2. Electrical parts specifications
Parts name
Model Symbol
TH21
TH22
TH23
FUSE
MF
C
MV
DP
DS
LEV
H2
TB2
TB5
TB15
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
240V 15W
(L, N, ;) Rated to 330V 30A w
(M1, M2, S) Rated to 250V 20A w
(1, 2) Rated to 250V 10A w
PLFY-P25VCM-E.THPLFY-P20VCM-E.TH PLFY-P32VCM-E.TH PLFY-P40VCM-E.TH
Thermistor
(Room temperature
detection)
Thermistor
(Pipe temperature
detection/ Liquid)
Thermistor
(Pipe temperature
detection/ Gas)
Fuse
(Indoor controller board)
Fan motor
(with Thermal fuse) Thermal fuse
Electric heater
(Condensation proof)
Power supply terminal
block
Transmission terminal
block
MA remote controller
terminal block
6-pole OUTPUT 15W
PK6V15-LC
6-pole OUTPUT 11W
PK6V11-LE 6-pole OUTPUT 20W PK6V20-LK
6-pole OUTPUT 20W
PK6V20-LJ
MSBPC20M13
DC12V 300
" /phase
PLD-12230ME-1
INPUT 12/10.8W 24R/Hr
Thermistor resistance 0:/6k", 10:/3.9k", 20:/2.6k", 25:/2.2k", 30:/1.8k", 40:/1.3k"
DC12V Stepping motor drive port dimension 5.2 " (0~2000pulse)
EDM-40YGME
OFF 145:i2:
1.5+✕440V1.0+✕440V
Fan motor capacitor
Vane motor
Drain pump
Drain sensor
Linear expansion valve
[coil]
w Note: Refer to WIRING DIAGRAM for the supplied voltage.
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4 4-WAY AIR FLOW SYSTEM
4-1. Fresh air intake (Location for installation)
At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when required.
Detail drawing of fresh air intake
Ceiling surface
Refrigerant pipe Drain pipe
Electrical Box
Cut out hole
[73.4
Burring hole
3-[2.8 hole
[100
118
25
120°
120°
Fresh air intake
Static pressure : P [Pa] Air flow : Q [m3/min]
50
-50
-100
-150
-200
-250
-300
00.5 1.0 1.5 2.0 2.5 3.0 3.5
PLFY-P20VCM-E.TH
PLFY-P25VCM-E.TH
PLFY-P32VCM-E.TH
PLFY-P40VCM-E.TH
Taking air into the unit
4-2. Fresh air intake amount & static pressure characteristics
Q
0
BA
C
1Curve in the
left praphs.
Duct characteristics
at site
Q
A
E C
2
Q
Qa
A D
3
Q…Planned amount of fresh air intake
A…Static pressure loss of fresh air
intake duct system with air flow
amount Q
B…Forced static pressure at air condi-
tioner inlet with air flow amount Q
C…Static pressure of booster fan with
air flow amount Q
D…Static pressure loss increase
amount of fresh air intake dust sys-
tem for air flow amount Q <Pa>
E…Static pressure of indoor unit with air
flow amount Q
Qa…Estimated amount of fresh air
intake with out D <m3/min>
<m3/min>
<Pa>
<Pa>
<Pa>
<Pa>
How to read curves
NOTE: Fresh air intake amount should be 20% or less of
whole air amount to prevent dew dripping.
4-3. Interlocking operation method with
duct fan (Booster fan)
• Whenever the indoor unit is operating, the duct fun also
operates.
(1)Connect the optional multiple remote controller
adapter(PAC-SA88HA-E)to the connector CN51 on the
indoor controller board.
(2)Drive the relay after connecting the 12V DC relay
between the Yellow and Orange connector lines.
MB: Electromagnetic switch power relay for duct fan.
X:Auxiliary relay (For DC 12V, coil rating : 1.0W or below)
CN51
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
Distance between indoo
controller board and rela
must be within 10m.
Be sure to secure insulation
material by tape and such
5Green
Yellow
Orange
Connector (5P)
Package side Multiple remote
controller adapter
PAC-SA88HA-E Be sure to secure insulat
material by tape and such
Installation at site
CN51
on indoor
controller board
Red
Brown
1
~
CN51
M
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