Mitsubishi Electric PLFY Series Operating manual

PARTS CATALOG (OCB723)
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
No. OCH723
October 2019
TECHNICAL & SERVICE MANUAL
CONTENTS
1. SAFETY PRECAUTION..........................2
2. PARTS NAMES AND FUNCTIONS........2
3. SPECIFICATIONS.................................10
4. 4-WAY AIR FLOW SYSTEM................. 13
5. OUTLINES AND DIMENSIONS............ 16
6. WIRING DIAGRAM...............................17
7. REFRIGERANT SYSTEM DIAGRAM...... 18
8. TROUBLESHOOTING.......................... 19
9. SPECIAL FUNCTION........................... 26
10. DISASSEMBLY PROCEDURE............. 29
INDOOR UNIT
Model name
indication for
MAIN UNIT
Model name
indication for GRILLE
Indoor unit
[Model names] [Service Ref.]
PLFY-WL32VEM-E
PLFY-WL32VEM-ET
PLFY-WL32VEM-E.UK
PLFY-WL32VEM-ET.UK
PLFY-WL40VEM-E
PLFY-WL40VEM-ET
PLFY-WL40VEM-E.UK
PLFY-WL40VEM-ET.UK
PLFY-WL50VEM-E
PLFY-WL50VEM-ET
PLFY-WL50VEM-E.UK
PLFY-WL50VEM-ET.UK
Grille model
[Model names]
PLP-6EA
PLP-6EAE
PLP-6EAL
PLP-6EALE
PLP-6EAJ
PLP-6EAJE
PLP-6EALM
PLP-6EALME

32 3
OCH723
Cautions for units utilizing refrigerant R410A
Only use water.
Only use clean water as a refrigerant. The use of water
outside the specification may damage the refrigerant circuit.
Do not use the existing water piping.
Store the piping materials indoors, and keep both ends of
the pipes sealed until immediately before installation. Keep
the joints wrapped in plastic bags. If dust or dirt enters the
water circuit, it may damage the heat exchanger and cause
water leakage.
.CAUTION
2PARTS NAMES AND FUNCTIONS
Drain pipe
Filter
Vane
Inlet pipe
Outlet pipe
Air outlet
Air intake
(Intake grille)
i-see Sensor
(Option)
Signal receiver
(Option)
2-1. Indoor unit
Model name
indication for
MAIN UNIT
Model name
indication for GRILLE
2-2. WIRED REMOTE CONTROLLER <PAR-40MAA>
: Supported : Unsupported
Function PAR-40MAA
Slim CITY MULTI
Body Product size H × W × D (mm) 120 × 120 × 14.5
LCD Full Dot LCD
Backlight
Energy saving Energy saving operation schedule
Automatic return to the preset temperature
Restriction Setting the temperature range restriction
Function* Operation lock function
Weekly timer
ON/OFF timer
High Power
Manual vane angle
*Some functions may not be available depending on model types.
Wired remote controller function
The functions which can be used are restricted according to each model.
1SAFETY PRECAUTION

3
OCH723 3
Function buttons
操作部 _new
4 3 2 1
5
6
7890
The functions of the function buttons change depending on the
screen.
Refer to the button function guide that appears at the bottom of
the LCD for the functions they serve on a given screen.
When the system is centrally controlled, the button function
guide that corresponds to the locked button will not appear.
Fri
Room
Set temp.
Mode Temp. Fan
Cool Auto
A005_new
Main display Main menu
Function guide
▌1[ON/OFF] button
Press to turn ON/OFF the indoor unit.
▌2[SELECT] button
Press to save the setting.
▌3[RETURN] button
Press to return to the previous screen.
▌4[MENU] button
Press to bring up the Main menu.
▌5Backlit LCD
Operation settings will appear.
When the backlight is off, pressing any button turns the backlight
on and it will stay lit for a certain period of time depending on the
screen.
When the backlight is off, pressing any button turns the backlight
on and does not perform its function. (except for the [ON/OFF]
button)
▌6ON/OFF lamp
This lamp lights up in green while the unit is in operation. It blinks
while the remote controller is starting up or when there is an error.
▌7Function button [F1]
Main display: Press to change the operation mode.
Menu screen: The button function varies with the screen.
▌8Function button [F2]
Main display: Press to decrease temperature.
Main menu: Press to move the cursor left.
Menu screen: The button function varies with the screen.
▌9Function button [F3]
Main display: Press to increase temperature.
Main menu: Press to move the cursor right.
Menu screen: The button function varies with the screen.
▌0Function button [F4]
Main display: Press to change the fan speed.
Menu screen: The button function varies with the screen.
Controller interface
7 8 9 07 8 9 0
Main Main menu
Energy saving
A006_new
Main display:
Cursor
Operation
Vane·Louver·Vent. (Lossnay)
High power
Comfort
A007_new
Menu screen
7 8 9 0

4 5
OCH723
The main display can be displayed in two different modes: “Full” and “Basic”. The factory setting is “Full”. To switch to the “Basic” mode, change the
setting on the Main display setting. (Refer to operation manual included with remote controller.)
▌1Operation mode
▌2Preset temperature
▌3Clock
Current time appears here.
▌4Fan speed
▌5Button function guide
Functions of the corresponding buttons appear here.
▌6
Appears when the ON/OFF operation is centrally controlled.
▌7
Appears when the operation mode is centrally controlled.
▌8
Appears when the preset temperature is centrally controlled.
▌9
Appears when the filter reset function is centrally controlled.
▌0
Indicates when filter needs maintenance.
▌1Room temperature
Current room temperature appears here.
▌2
Appears when the buttons are locked.
▌3
Appears when the On/Off timer, Night setback, or Auto-off timer
function is enabled.
appears when the timer is disabled by the centralized control
system.
<Full mode>
* All icons are displayed for explanation.
Fri
Mode Temp. Fan
Room
Cool Set temp. Auto
<Basic mode>
Fri
Cool
Mode Temp. Fan
Set temp. Auto
2
1
5
6
7
8
90
1
3
9
4
)
!
2 3 4 5 6 7 @ 2
1
5
▌4
Appears when the Weekly timer is enabled.
▌5
Appears while the units are operated in the energy-save mode. (Will
not appear on some models of indoor units)
▌6
Appears while the outdoor units are operated in the silent mode.
(This indication is not available for CITY MULTI models.)
▌7
Appears when the built-in thermistor on the remote controller is
activated to monitor the room temperature (1).
appears when the thermistor on the indoor unit is activated to
monitor the room temperature.
▌8
Indicates the vane setting.
▌9
Indicates the louver setting.
▌)
Indicates the ventilation setting.
▌!
Appears when the preset temperature range is restricted.
▌@
Appears when an energy-saving operation is performed using a “3D i-
See sensor” function. (not available)
▌#Centrally controlled
Appears for a certain period of time when a centrally-controlled item is
operated.
▌$Preliminary error display
An error code appears during the preliminary error.
Most settings (except ON/OFF, mode, fan speed, temperature) can be
made from the Main menu. (Refer to Page 10.)
Display
4
3
$
#
8

5
OCH723
Menu structure
Not all functions are available on all models of indoor units.
Energy saving
Main menu Press the MENU button.
Move the cursor to the desired item with the F1 and F2 buttons, and press the SELECT button.
Operation
Initial setting menu
Manual vane angle
ON/OFF timer
Auto return
Clock
Main/Sub
Temp. range
Auto-OFF timer
Schedule
Daylight saving time
Clock
Administrator password
Operation locked
3D i-see Sensor
High power
Vane · Louver · Vent. (Lossnay)
Comfort
Timer
Energy saving
Basic setting
Display setting
Operation setting
Restriction
Weekly timer
OU silent mode
Timer menu
Main display
Display details
Contrast • Brightness
Language selection
Auto mode
Continue to the next page.
Night setback

6 7
OCH723
Maintenance menu
Service menu
Drain pump test run
Serial No. input
Lossnay
Diagnosis
Initialize remote controller
Remote controller information
Initialize maintenance info.
Test run
Model name input
Function setting
Error history
Maintenance password
Dealer information input
Error information
Test run menu
Maintenance information
Filter information
Cleaning
Settings menu
Check menu
Other menu
Auto descending panel
Descending operation
Self check
Descending adjustment
Remote controller check
Continue from the previous page.
Not all functions are available on all models of indoor units.

7
OCH723
Main menu list
Main
menu Setting and display items Setting details
Operation Vane · Louver · Vent.
(Lossnay)
Use to set the vane angle.
• Select a desired vane setting from 5 different settings.
Use to turn ON/OFF the louver.
• Select a desired setting from "ON" and "OFF."
Use to set the amount of ventilation.
• Select a desired setting from "Off," "Low," and "High."
High power Use to reach the comfortable room temperature quickly.
• Units can be operated in the High-power mode for up to 30 minutes.
Comfort Manual
vane angle
Use to x each vane angle.
3D i-see Sensor Use to set the following functions for 3D i-see Sensor.
• Air distribution • Energy saving option • Seasonal airow
Timer Timer ON/OFF timer *1Use to set the operation ON/OFF times.
• Time can be set in 5-minute increments.
Auto-Off
timer
Use to set the Auto-Off time.
• Time can be set to a value from 30 to 240 in 10-minute increments.
Weekly timer *1, *2Use to set the weekly operation ON/OFF times.
• Up to 8 operation patterns can be set for each day.
(Not valid when the ON/OFF timer is enabled.)
OU silent mode *1Use to set the time periods in which priority is given to quiet operation of
outdoor units over temperature control. Set the Start/Stop times for each day
of the week.
•Select the desired silent level from "Normal," "Middle," and "Quiet."
Night setback *1Use to make Night setback settings.
• Select "Yes" to enable the setting, and "No" to disable the setting. The temperature
range and the start/stop times can be set.
Energy
saving
Restriction Temp. range *2Use to restrict the preset temperature range.
• Different temperature ranges can be set for different operation modes.
Operation lock Use to lock selected functions.
• The locked functions cannot be operated.
Energy
saving
Auto return *2Use to get the units to operate at the preset temperature after performing
energy saving operation for a specied time period.
• Time can be set to a value from 30 and 120 in 10-minute increments.
(This function will not be valid when the preset temperature ranges are restricted.)
Schedule *1Set the start/stop times to operate the units in the energy saving mode for
each day of the week, and set the energy saving rate.
• Up to 4 energy saving operation patterns can be set for each day.
• Time can be set in 5-minute increments.
• Energy saving rate can be set to a value from 0% or 50 to 90% in 10% increments.
*1Clock setting is required.
*21°C increments.

8
OCH723
Main
menu Setting and display items Setting details
Initial
setting
Basic
setting
Main/Sub When connecting 2 remote controllers, one of them needs to be designated as
a sub controller.
Clock Use to set the current time.
Daylight
saving time
Set the daylight saving time.
Administrator
password
The administrator password is required to make the settings for the following
items.
• Timer setting • Energy saving setting • Weekly timer setting
• Restriction setting • Outdoor unit silent mode setting • Night set back
Display
setting
Main display Use to switch between "Full" and "Basic" modes for the Main display.
• The initial setting is "Full."
Black and white
inversion setting
Use to invert the colors of the display, turning white background to black and
black characters to white.
Display details Make the settings for the remote controller related items as necessary.
Clock: The initial settings are "Yes" and "24h" format.
Temperature: Set either Celsius (°C) or Fahrenheit (°F).
Room temp. : Set Show or Hide.
Auto mode: Set the Auto mode display or Only Auto display.
Contrast •
Brightness
Use to adjust screen contrast and brightness.
Language
selection
Use to select the desired language.
Operation
setting
Auto mode Whether or not to use the Auto mode can be selected by using the button.
This setting is valid only when indoor units with the Auto mode function are
connected.
Mainte-
nance
Error information Use to check error information when an error occurs.
• Check code, error source, refrigerant address, unit model, manufacturing number,
contact information (dealer's phone number) can be displayed.
(The unit model, manufacturing number, and contact information need to be
registered in advance to be displayed.)
Filter information Use to check the lter status.
• The lter sign can be reset.
Cleaning Auto
descending
panel
Use to lift and lower the auto descending panel (Optional parts).
Service Test run Select "Test run" from the Service menu to bring up the Test run menu.
• Test run • Drain pump test run
Input maintenance Select "Input maintenance Info." from the Service menu to bring up the
Maintenance information screen.
The following settings can be made from the Maintenance Information screen.
• Model name input • Serial No. input • Dealer information input • Initialize
maintenance info.
Settings Function setting Make the settings for the indoor unit functions via the remote controller as
necessary.
LOSSNAY setting This setting is required only when the operation of CITY MULTI units is
interlocked with LOSSNAY units.
Check
Error history
Display the error history and execute "delete error history".
Diagnosis Self check: Error history of each unit can be checked via the remote controller.
Remote controller check: When the remote controller does not work properly, use
the remote controller checking function to troubleshoot the problem.
Other Maintenance
password
Use to change the maintenance password.
Initialize remote
controller
Use to initialize the remote controller to the factory shipment status.
remote controller
information
Use to display the remote controller model name, software version, and serial
number.

OCH723 9
2-3. Wireless remote controller
Operation mode
Cool Dry
Fan Auto
(single set point)
Heat 2Auto
(dual set point*)
Temperature setting
The units of temperature can be changed. For
details, refer to the Installation Manual.
Not available
Appears when a non-supported func-
tion is selected.
Battery replacement indicator
Appears when the remaining battery
power is low.
Vane setting
Step 1 Step 2 Step 3 Step 4 Step 5 Swing Auto
Fan speed setting
Set Temperature buttons
Set Time button (Sets the time)
Airow button (Changes up/down airow direction)
Mode button (Changes operation mode)
Timer ON button
Timer OFF button
OFF/ON button
Fan Speed button (Changes fan speed)
SET/SEND button
CANCEL button
Up/Down buttons
Menu button
i-see button
Reset button
Remote controller display
Battery replacement indicator
Transmission area
Not available
Weekly timer ON/OFF button
(not available)
3D i-see Sensor (Air distribution)
Default Direct Indirect When Direct or Indirect
is selected, the vane
setting is set to “Auto”.
* The initial setting is necessary.
Refer to Installation manual.

1110 11
OCH723
3-1. SPECIFICATIONS
3SPECIFICATIONS
Model PLFY-WL32VEM-E
PLFY-WL32VEM-ET
PLFY-WL40VEM-E
PLFY-WL40VEM-ET
PLFY-WL50VEM-E
PLFY-WL50VEM-ET
Power source 1-phase 220–240 V 50 Hz, 1-phase 220 V 60 Hz
Cooling capacity *1
(Nominal) *1
*1
*2
kW 3.6 4.5 5.6
kcal/h 3,100 3,900 4,800
BTU/h 12,300 15,400 19,100
kcal/h 3,150 4,000 5,000
Power input kW 0.03 0.03 0.04
Current input A 0.33 0.35 0.40
Heating capacity *3
(Nominal) *3
*3
kW 4.0 5.0 6.3
kcal/h 3,400 4,300 5,400
BTU/h 13,600 17,100 21,500
Power input kW 0.03 0.03 0.04
Current input A 0.27 0.29 0.34
External nish Galvanized steel sheet
External dimension
H × W × D
mm 258 × 840 × 840
10-3/16 × 33-3/32 × 33-3/32
inch
Net weight kg (lb) 20 (44)
Grille model PLP-6EA
External nish MUNSELL (1.0Y 9.2/0.2)
Dimension
H × W × D
mm 40 × 950 × 950
inch 1-9/16 × 37-13/32 × 37-13/32
Net weight kg (lb) 5 (11)
Heat exchanger Cross n (Aluminum n and copper tube)
FAN Turbo fan × 1 Turbo fan × 1 Turbo fan × 1
External static
press.
Pa 0 0 0
mmH2O 0 0 0
Motor type DC motor
Motor output kW 0.050 0.050 0.050
Driving mechanism Direct-drive
Airow rate
(Low-Mid2-
Mid1-High)
K/min 14 - 15 - 16 - 17 14 - 15 - 16 - 17 14 - 16 - 18 - 20
L/s 233 - 250 - 267 - 283 233 - 250 - 267 - 283 233 - 267 - 300 - 333
cfm 494 - 530 - 565 - 600 494 - 530 - 565 - 600 494 - 565 - 636 - 706
Sound pressure level
(Low-Mid2-Mid1-High)
(measured in anechoic room)
dB <A> 26 - 27 - 29 - 30 26 - 28 - 29 - 31 27 - 29 - 31 - 33
Insulation material PS
Air lter PP honeycomb
Protection device Fuse
Connectable outdoor unit HYBRID CITY MULTI/CMB-WM-V-AA, CMB-WM-V-AB/CMH-WM-V-A
Water pipe
dimensions
Water inlet mm I.D. 20
Water outlet
mm I.D. 20
Field drain pipe size mm (inch) O.D. 32 mm (1-1/4") (PVC pipe VP-25 connectable)
Standard
attachment
Document
Accessory
Installation Manual, Instruction Book
Remark Optional parts
Grille **1 PLP-6EA
Air outlet shutter plate PAC-SJ37SP-E
High efciency lter
element **2 PAC-SH59KF-E
Multi-function
casement PAC-SJ41TM-E
VALVE KIT PAC-SK04VK-E
**1. PLFY-VEM series should be used together with PLP-6EA.
**2. PAC-SJ41TM-E is necessary to use with lter PAC-SH59KF-E.
Installation Details on foundation work, duct work, insulation work, electrical wiring, power source switch, and other
items shall be referred to the Installation Manual.
*1 Nominal cooling condition
Indoor :
Outdoor :
Pipe length :
Level difference :
27˚CDB/19˚CWB (81˚FDB/66˚FWB)
35˚CDB (95˚FDB)
7.5 m (24-9/16 ft)
0m (0 ft)
*2 Nominal cooling condition
27˚CDB/19.5˚CWB (81˚FDB/67˚FWB)
35˚CDB (95˚FDB)
5m (16-3/8 ft)
0m (0 ft)
*3 Nominal heating condition
20˚CDB (68˚FDB)
7˚CDB/6˚CWB (45˚FDB/43˚FWB)
7.5 m (24-9/16 ft)
0 m (0 ft)
*1 and *3 are subject to JIS B8615-1.
2. Due to continuing improvement, above specification may be subject to change without notice.
1. Nominal conditions
Notes:
Unit converter
kcal/h = kW × 860
Btu/h = kW × 3,412
cfm = K/min × 35.31
lb = kg/0.4536
*Above specication data
is subject to rounding
variation.

11
OCH723 11
3-2. ELECTRICAL PARTS SPECIFICATIONS
Service Ref.
Parts name Symbol PLFY-WL32VEM-E.UK
PLFY-WL32VEM-ET.UK
PLFY-WL40VEM-E.UK
PLFY-WL40VEM-ET.UK
PLFY-WL50VEM-E.UK
PLFY-WL50VEM-ET.UK
Room temperature
thermistor TH21 Resistance 0:/15 k", 10:/9.6 k", 20:/6.3 k", 25:/5.4 k", 30:/4.3 k", 40:/3.0 k"
Liquid pipe thermistor TH22 Resistance 0:/15 k", 10:/9.6 k", 20:/6.3 k", 25:/5.4 k", 30:/4.3 k", 40:/3.0 k"
Gas pipe thermistor TH23 Resistance 0:/15 k", 10:/9.6 k", 20:/6.3 k", 25:/5.4 k", 30:/4.3 k", 40:/3.0 k"
Fuse
(Indoor controller board)
FUSE 250 V 6.3 A
Fan motor MF 8-pole OUTPUT 50 W
Vane motor MV MSBPC20M13
DC12 V 300 "/phase
Drain pump DP PMD-12D13ME
INPUT 3 W 24R/Hr
Drain oat switch FS Open / Short detection
Linear expansion valve LEV DC12V Stepping motor drive port dimension ø 3.2 (0–2000pulse)
EDM-40YGME
Power supply terminal
block TB2 (L, N) Rated to 330 V 30 A *
Transmission terminal
block TB5 (M1, M2, S) Rated to 250 V 20 A *
MA remote controller
terminal block TB15 (1, 2) Rated to 250 V 10 A *
*Refer to WIRING DIAGRAM for the supplied voltage.
3-3. SOUND PRESSURE LEVEL
Note: Measured in anechoic room.
PLFY-WL ·VEM-E
PLFY-WL32VEM-E.UK
PLFY-WL32VEM-ET.UK
Service Ref.
PLFY-WL40VEM-E.UK
PLFY-WL40VEM-ET.UK 26-28-29-31
Sound pressure level dB (A)
Sound pressure level at anechoic room : Low-Mid2-Mid1-High
1.5 m
Measurement location
PLFY-WL50VEM-E.UK
PLFY-WL50VEM-ET.UK 27-29-31-33
26-27-29-30

1312 13
OCH723
3-4. NC CURVES
10
20
30
40
50
60
70
80
90
63 125 250 500 1000 2000 4000 8000
Approximate minimum
audible limit on
continuous noise
PLFY-WL32VEM-E.UK
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB（0dB=0.0002μbar)
BAND CENTER FREQUENCIES, Hz
High
FAN
Medium1
30
SPL(dB)
29
27
26
LINE
Medium2
Low
PLFY-WL32VEM-ET.UK
10
20
30
40
50
60
70
80
90
63 125 250 500 1000 2000 4000 8000
Approximate minimum
audible limit on
continuous noise
PLFY-WL50VEM-E.UK
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB（0dB=0.0002μbar)
BAND CENTER FREQUENCIES, Hz
High
FAN
Medium1
33
SPL(dB)
31
29
27
LINE
Medium2
Low
PLFY-WL50VEM-E.UK
10
20
30
40
50
60
70
80
90
63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB（0dB=0.0002μbar)
BAND CENTER FREQUENCIES, Hz
High
FAN
Medium1
31
SPL(dB)
29
28
26
LINE
Medium2
Low
Approximate minimum
audible limit on
continuous noise
PLFY-WL40VEM-E.UK
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70
PLFY-WL40VEM-ET.UK

13
OCH723 13
44-WAY AIRFLOW SYSTEM
4-1. PLACEMENT OF THE AIR OUTLETS
• For this grille, the blowout direction comes in 11 patterns.
Also, by setting switch on the controller board to the appropriate settings, you can adjust the airflow and speed. Select the
settings from Table1 according to the location in which you want to install the unit.
1) Decide on the pattern of the airflow direction.
Blowout direction
pattern
4-direction<Table 1> 3-direction 2-direction
Note1.
For 3- and 2-direction settings, please use the air outlet shutter plate (option).
Pattern 1 Initial setting Pattern 4 1 air outlet
fully closed
Pattern 6 2 air outlet
fully closed
2) According to the number of air outlets and height of the ceiling to install the unit, be sure to set up the switch (SW21)
on the circuit board to the appropriate setting.
• Correspondence of ceiling heights to the number of air outlets
PLFY-WL32/40/50VEM-E
PLFY-WL32/40/50VEM-ET
Silent Standard High ceiling
SW21-1 SW21-2 SW21-1 SW21-2 SW21-1 SW21-2
OFF ON OFF OFF ON OFF
4 direction SW21-3 OFF
SW21-4 ON
3 direction SW21-3 OFF
SW21-4 OFF
2 direction SW21-3 ON
SW21-4 OFF
2.5 m
2.7 m
3.0 m
2.7 m
3.0 m
3.3 m
3.5 m
3.5 m
3.5 m
SW12 SW11
SW14

14 15
OCH723
CN51
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
Distance between indoor
controller board and relay
must be within 10m.
Be sure to secure insulation
material by tape, etc.
5Green
Yellow −
Orange +
Connector (5P)
Indoor unit side
Multiple remote
controller adapter
PAC-SA88HA-E
Be sure to secure insulation
material by tape, etc.
Field installation
CN51
on
indoor
controller
board Red
Brown
1
~
CN51
MB
4-3. OPERATION IN CONJUNCTION WITH DUCT FAN (Booster fan)
• Whenever the indoor unit is operating, the duct fan 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 12 V DC relay between the Yellow and Orange connector lines.
MB: Electromagnetic switch power relay for duct fan.
X:
Auxiliary relay (For 12 V DC, coil rating: 1.0W or smaller)
Unit : mm
Branch duct hole
A
A
A
Drain pipe
Fresh air intake hole diagram
Inlet pipe
Branch duct hole diagram
(view from either side)
350×100 cutout hole
[150 cutout hole
[175 burring hole pitch
[125 burring hole pitch[100 cutout hole
Ceiling
Fresh air intake hole
A
A
Outlet pipe
4-2. BRANCH DUCT HOLE AND FRESH AIR INTAKE HOLE
At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when
required.
• A fresh air intake hole for the optional multi-functional casement can also be made.
Note:
The figures marked with * in the drawing below represent the dimensions of the main unit excluding those of the optional
multi-functional casement.
When installing the optional multi-functional casement, add 135 mm to the dimensions marked on the figure.
When installing the branch ducts, be sure to insulate adequately.
Otherwise, condensation and dripping may occur.

Static pressure[Pa]
Airflow rate [m3/min]
Static pressure[Pa]
Airflow rate [m3/min]
Static pressure[Pa]
Static pressure[Pa]
Airflow rate [m3/min] Airflow rate [m3/min]
Static pressure[Pa]
Airflow rate [m3/min] Airflow rate [m3/min]
Static pressure[Pa]
−150
−125
−100
−75
−25
−50
0
50
25
0 0.2 0.4 0.6 0.8 1 1.2 1.4
−200
−150
−100
−50
0
50
0 1 2 3 4 5 6
−150
−200
−100
−50
0
50
0 1 2 3 4 5 6
−150
−200
−100
−50
0
50
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8
−150
−200
−100
−50
0
50
0 1 2 3 4 5 6 7
−150
−200
−100
−50
0
50
0 1 2 3 4 5 76
2 - inlet
2 - inlet
2 - inlet
1 - inlet
1 - inlet
1 - inlet
2 - inlet
1 - inlet
15
OCH723
PLFY-WL32/40/50VEM-E.UK
PLFY-WL32/40/50VEM-ET.UK
Taking air into the unit Multi-functional casement + Standard filter
Multi-functional casement + High efficiency filter
4-4. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
Q
0
BA
C
1Curve in the
graphs
Duct characteristics
at site
Q
A
E C
2
Q
Qa
A D
3
Q…Designed amount of fresh air intake
<m3/min>
A…Static pressure loss of fresh air
intake air duct system with airflow
amount Q <Pa>
B…Forced static pressure at air condi-
tioner inlet with airflow amount Q
<Pa>
C…Static pressure of booster fan with
airflow amount Q <Pa>
D…Static pressure loss increase amount
of fresh air intake duct system for
airflow amount Q <Pa>
E…Static pressure of indoor unit with
airflow amount Q <Pa>
Qa…Estimated amount of fresh air
intake without D <m3/min>
How to read curves

16 17
OCH723
5OUTLINES AND DIMENSIONS
PLFY-WL32VEM-E.UK PLFY-WL40VEM-E.UK PLFY-WL50VEM-E.UK
PLFY-WL32VEM-ET.UK PLFY-WL40VEM-ET.UK PLFY-WL50VEM-ET.UK
Unit: mm
WALL
CEILING HEIGHT CEILING SPACE
GRILLE
2500 mm OR MORE
FROM FLOOR
INDOOR UNIT
INDOOR UNIT
FLOOR
INTERVAL BETWEEN UNIT
OBSTACLE
CEILING
3000 mm MIN
1500 mm MIN
1000 mm MIN
7 mm MIN
265 mm MIN 3500 mm MAX
BETWEEN TOP OF UNIT
AND CEILING SLAB
EMERGENCY OPERATION
SWITCH <COOLING> AND
EMERGENCY UP/DOWN
SWITCH <UP>
EMERGENCY OPERATION
SWITCH <HEATING> AND
EMERGENCY UP/DOWN
SWITCH <DOWN>
RECEIVER OPERATION
LAMP
DEFROST/STANDBY LAMP
DETAILS OF SIGNAL RECEIVER
NOTE1. CHOOSE THE GRILLE AMONG THE DEDICATED GRILLES.
2. REINFORCE THE SUSPENSION BOLT FOR EARTHQUAKE-RESISTANCE AS NEEDED. 3. FOR THE SUSPENSION BOLT, USE M10 OR W3/8. (PROCURED AT THE LOCAL SITE.) 4. FOR DRAIN PIPE, USE VP-25 (O.D. Ø 32 PCV TUBE) DRAIN PUMP INCLUSION. RAISE IS MAX 850 mm FROM THE CEILING. 5. ELECTRICAL BOX MAY BE REMOVED FOR THE SERVICE PURPOSE. MAKE SURE TO SLACK THE ELECTRICAL WIRE LITTLE BIT FOR CONTROL/POWER WIRES CONNECTION. 6. THE HEIGHT OF THE INDOOR UNIT IS ABLE TO BE ADJUSTED WITH THE GRILLE ATTACHED. 7. WHEN INSTALLING THE BRANCH DUCTS, BE SURE TO INSULATE ADEQUATELY. OTHERWISE CONDENSATION AND DRIPPING MAY OCCUR. (IT BECOMES THE CAUSE OF DEW DROPS/WEAR DEW.) 8. AS FOR NECESSARY INSTALLATION/SERVICE SPACE, PLEASE REFER TO THE RIGHT AT FIGURE. 9. FOR THE INSTALLATION OF THE OPTIONAL HIGH EFFICIENCY FILTER OR MULTI-FUNCTIONAL CASEMENT , REFER TO SPECIAL DRAWING.
DETAILS OF FRESH AIR INTAKE HOLE
Ø 125 BURRING HOLE PITCH
SELF-TAPPING SCREWS: 3 PLACES
Ø
100
CUT-OUT HOLE
CEILING
158
120°
120°
AUTOMATIC FILTER ELEVATION PANEL UP/DOWN DIMENSION
CEILING
FILTER
AIR INTAKE GRILLE
4000 mm MAX
SIGNAL RECEIVER SOME GRILLES DO NOT HAVE THIS PART.
AIR INTAKE GRILLE
(AIR INTAKE HOLE)
(AIR OUTLET HOLE)
(AIR INTAKE HOLE)
(AIR OUTLET HOLE)
VANE MOTOR
CORNER POCKET
I-SEE SENSOR CORNER PANEL
SOME GRILLES DO NOT HAVE THIS PART.
* CAN INSTALL TO THE CORNER
EXCEPT DRAIN PIPE CORNER (NEED TO FUNCTION SETTING BY REMOTE CONTROLLER)
AUTO VANECOMPANY NAME
DRAIN HOLE
508
530 508
37 89 530
950
8937
950
FRESH AIR INTAKE HOLE
BRANCH DUCT HOLE
VALVE KIT
INSTALL SIDE
BRANCH DUCT HOLE
(MOUNTED P.C. BOARD) (MOUNTED P.C. BOARD)
BRANCH DUCT HOLE
BRANCH DUCT HOLE
MA REMOTE
CONTROLLER
TERMINAL BLOCK
POWER SUPPLY
TERMINAL BLOCK
INDOOR UNIT/OUTDOOR UNIT
CONNECTING WIRE,
REMOTE CONTROLLER WIRE ENTRY
(CEILING HOLE)
(SUSPENSION BOLT PITCH)
(CEILING HOLE)
INDOOR/OUTDOOR UNIT CONNECTING
TERMINAL BLOCK
INLET PIPE
(CUT-OFF)
OUTLET PIPE
(CUT-OFF)
(SUSPENSION BOLT PITCH)
145
840
145
133
79.5
71.5
74.5
795
20-45 860-910 20-45
193
222
145
6
660 +40 0 (20)(20)
145
860-910 20-4520-45
840
INDOOR UNIT/OUTDOOR UNIT
CONNECTING WIRE,
REMOTE CONTROLLER WIRE ENTRY
GRILLE
CEILING
SELF-TAPPING SCREWS : 4 PLACES
(CONNECTING TO VALVE KIT)
175
190
420
380
90
SELF-TAPPING SCREWS : 10 PLACES
(CONNECTING TO BRANCH DUCT)
GRILLE
CEILING
Ø 150 CUT-OUT HOLE
(CONNECTING TO BRANCH DUCT)
350 × 100 CUT-OUT HOLE
(CONNECTING TO BRANCH DUCT)
Ø 175 BURRING HOLE PITCH
SELF-TAPPING SCREWS : 4 PLACES
(CONNECTING TO BRANCH DUCT)
167
90 100 100 90
420
350
155
70°
MAIN UNIT
SUSPENSION BOLT
M10 OR W3/5
CEILING
DRAIN PIPE
VP-25 CONNECTION
(CONNECTED THE ATTACHED DRAIN SOCKET)
WATER INLET PIPE
PIPE O.D. Ø 22
WATER OUTLET PIPE
PIPE O.D. Ø 22
SUSPENSION BOLT
LOWER EDGE I-SEE SENSOR BOTTOM POWER SUPPLY WIRE ENTRY
GRILLE
60 628
58
50-70
165
190
190
105
17+5 0
40
241
258

17
OCH723
WIRING DIAGRAM
6
1
19 20
20
2
CNV
(WH)
CN20
(RD)
i-see
Sensor
CN44
(WH)
5555
MV
i-see Sensor
CORNER PANEL
(OPTION PART)
MVMVMV
M M M M
MT
M
LED1
LED2
1
3
74
1
DP
3~
MF
CNP
(WH)
MS
12
3~
MS
CN5Y
(WH)
I.B
3
5
31
14
CND
(BK)
BK
RD
CNMF
(WH)
1
4
4
1
1
9
CN51
(WH)
CN52
(GN)
S
M2
M1
2
1
TB5
TB15
SW1
SW12SW11 SW14
0987654321
SW3
0987654321
SW2
654321
SW21
654321
OFF
ON OFF ON OFF ON OFF ON OFF ON
SW22
4321
31
CN90
(WH)
CN4F
(WH)
CN4Z
(WH)
CN32
(WH)
1
51 5
1
5
SWE
ONOFF
tº
TH21
FS
tº
TH22
tº
TH23
BU
F1
+–
See fig. 1
TO NEXT
INDOOR UNIT
PULL
BOX
FUSE(16A)
BREAKER
(16A)
L
N
TO OUTDOOR UNIT
BC CONTROLLER
ME-REMOTE CONTROLLER
24-30V DC
TO MA-REMOTE CONTROLLER 8.7-13V DC
POWER SUPPLY
~/N 220-240V 50Hz
220V 60Hz
* Be sure to turn off the source power and
then disconnect fan motor connector.
(Failure to do so will cause trouble in
Fan motor)
4 1
4
1
CN4G
AUTOMATIC FILTER
ELEVATION PANEL
(OPTION PART)
CN4G
(BU)
4
54
CN105
(RD)
15
0
1
2
3
4
5
6
7
8
9
BRANCH No.10s DIGIT
0
1
2
3
4
5
6
7
8
9
1s DIGIT
SW11 SW12 SW14
Detail of SW11, SW12 and SW14
Switches in the picture show “0”.
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
~
~
6 33 1
CNSA
(WH)
1
CNSB
(BK)
M
FCV
8
V.K
1
6
3
PS2
PS1
3
3
3
3
When attaching
VALVE KIT(option),
remove the jumper
connector CN8A and
fit the FLOW CONTROL
VALVE (FCV).
3 3
81
6
CN8A (WH)
CN8A
(WH)
1
W.B
RU
LED2 LED1
SW2SW1
CNB
9BZ
9
Mark
LED1
Main power supply
Power supply for
MA-Remote controller
Main Power supply (Indoor unit:220-240V AC)
power on → lamp is lit
Power supply for MA-Remote controller
on → lamp is lit
LED2
Meaning Function
LED on indoor board for service
CN32
CN51
CN52
SW2
SW3
F1
MF
DP
FS
TB2
TB5
TB15
W.B
RU
BZ
LED1
LED2
SW1
SW2
POWER SUPPLY
TRANSMISSION
MA-REMOTE CONTROLLER
FAN MOTOR
MT
i-see Sensor MOTOR
DRAIN PUMP
DRAIN FLOAT SWITCH
TERMINAL
BLOCK
I. B
INDOOR CONTROLLER BOARD
CONNECTOR
REMOTE SWITCH
CENTRALLY CONTROL
REMOTE INDICATION
CAPACITY CODE
SW1
MODE SELECTION
MODE SELECTION
SW11 ADDRESS SETTING 1s DIGIT
SW12 ADDRESS SETTING 10s DIGIT
SW14 BRANCH NO.
SW21
CEILING HEIGHT
DISCHARGE OUTLET NUMBER
OPTION SELECTOR
SW22
SWE
DRAIN PUMP (TEST MODE)
PAIR NO. SETTING
SWITCH
FUSE (T 6.3AL 250V)
SYMBOL
OPTION PART
PCB FOR WIRELESS REMOTE CONTROLLER
RECEIVING UNIT
BUZZER
LED (OPERATION INDICATION : GREEN)
LED (PREPARATION FOR HEATING : ORANGE)
EMERGENCY OPERATION (HEAT / DOWN)
EMERGENCY OPERATION (COOL / UP)
SYMBOLNAME NAME
V.K
PS1
PS2
VALVE KIT
PRESSURE SENSOR 1 (INLET)
PRESSURE SENSOR 2 (OUTLET)
IT TERMINAL
CN105
TH21
TH22
TH23
ROOM TEMP. DETECTION
(0ºC/15kΩ, 25ºC/5.4kΩ)
PIPE TEMP. DETECTION / INLET
(0ºC/15kΩ, 25ºC/5.4kΩ)
PIPE TEMP. DETECTION / OUTLET
(0ºC/15kΩ, 25ºC/5.4kΩ)
THERMISTOR
ON
OFF
123456
MODELS SW2
WL32
ON
OFF
123456
MODELS SW2
WL40
MODELS SW2
ON
OFF
123456
WL50
<fig. 1> SW2 (CAPACITY CODE)
NOTES:
1. At servicing for outdoor unit, always follow the wiring diagram of outdoor unit.
2. In case of using MA-Remote controller, please connect to TB15.
(Remote controller wire is non-polar.)
3. In case of using ME-Remote controller, please connect to TB5.
(Transmission line is non-polar.)
4. Symbol [S]of TB5 is the shield wire connection.
5. Symbols used in wiring diagram are,
: terminal block, : connector.
6. The setting of SW2 differs in the capacity.
For the detail, refer to the fig. 1.
7. Make sure to turn off the indoor and the outdoor units before replacing
indoor controller board.
8. is the switch position.
FCV
FLOW CONTROL VALVE
MV VANE MOTOR
PLFY-WL32VEM-E.UK PLFY-WL40VEM-E.UK PLFY-WL50VEM-E.UK
PLFY-WL32VEM-ET.UK PLFY-WL40VEM-ET.UK PLFY-WL50VEM-ET.UK

18 19
OCH723
7REFRIGERANT SYSTEM DIAGRAM
Unit : mm
Heat exchanger
Room temperature
detection thermistor TH21
Pipe temperature detection
thermistor/ inlet
TH22
Water inlet
connection
Manual air purge valve
Pipe temperature detection
thermistor/ outlet
TH23
Water outlet
connection
Service Ref.
PLFY-WL32/40/50VEM-E.UK
PLFY-WL32/40/50VEM-ET.UK
Item
Water outlet I.D. 20 [mm]
Water inlet I.D. 20 [mm]
PLFY-WL32VEM-E.UK PLFY-WL40VEM-E.UK PLFY-WL50VEM-E.UK
PLFY-WL32VEM-ET.UK PLFY-WL40VEM-ET.UK PLFY-WL50VEM-ET.UK

19
OCH723
TROUBLESHOOTING
8
8-1. HOW TO CHECK THE PARTS
Parts name Check points
Disconnect the connectors, then measure the resistance with a tester.
(At ambient temperatures of 10
to 30:)
Measure the resistance between the terminals with a tester.
Drain pump (DP)
i-see Sensor
Drain float switch (FS)
(Refer to “8-1-1. Thermistor”.)
Room temperature
detection thermistor (TH21)
Pipe temperature detection
thermistor/liquid (TH22)
Pipe temperature detection
thermistor/gas (TH23)
Normal
4.3
– 9.6 k"
Abnormal
Open or short
State of moving part Abnormal
DOWN Other than open
UP
Normal
Open
Short Other than short
Measure the resistance between the terminals with a tester.
(At ambient temperatures of 20
to 30:)
Vane motor (MV)
i-see Sensor motor
(MT) (Option)
Abnormal
Open or short
Red - Yellow (5-3, 0-8, 5-3, )-8)
Red - Blue (5-1, 0-6, 5-1, )-6)
Red - Orange (5-4, 0-9, 5-4, )-9)
Red - White (5-2, 0-7, 5-2, )-7)
Connector Normal
Measure the resistance between the terminals with a tester.
(At ambient temperatures of 20 to 30°C)
Abnormal
Open or short
Red - Yellow
Red - Blue
Red - Orange
Red - White
Connector Normal
250 "± 7%
Red
Purple
Black
1 Check if the drain float switch works properly.
2 Check if the drain pump works and drains water properly in cooling operation.
3 If no water drains, confirm that the check code 2502 will not be displayed 10 minutes after the
operation starts.
Note: The drain pump for this model is driven by the internal DC motor of controller board, so it is not
possible to measure the resistance between the terminals.
Normal
Red–Black: Input 13 V DC → The fan starts to rotate.
P
urple–Black: Abnormal (check code 2502) if it outputs 0–13 V square wave (5 pulses/rotation),
and the number of rotation is not normal.
300 "± 7%
2
1
Moving part
4
3
Switch
Magnet
Moving part
Yellow
Blue
Red
Orange
White
Yellow
Blue
Red
Orange
White
1 2 3 4
1 2 3
4
Black Black Black Black
Turn the power ON while the i-see Sensor connector is connected to the CN4Z on indoor
controller board. A communication between the indoor controller board and i-see Sensor
board is made to detect the connection.
Normal: When the operation starts, the motor for i-see Sensor is driven to rotate the i-see Sensor.
Abnormal: The motor for i-see Sensor is not driven when the operation starts.
Note: The voltage between the terminals cannot be measured accurately since it is pulse output.
1
2
3
PS1
6 5 4 3 2 1
GND(RED)
Vout(Brown)
Vcc(DC5V)(Orange) Connector
CNSA
(White)
PS2
3 2 1
GND(Blue)
Vout(White)
Vcc(DC5V)(Yellow)
Connector
CNSB
(Black)
Pressure sensor
(Optional parts)
▪ Pressure sensor (inner water) PS1
▪ Pressure sensor (outlet water) PS2
1. Check that the pressure sensor is connected.
2. Check the pressure sensor wiring for breakage.
Pressure 0-1.0 MPa [145 psi] Vout 0.5-4.5 V
0.392 V/ 0.098 MPa [14 psi]
Pressure [MPa] = 0.25 × Vout [V] - 0.125
Pressure [psi] = (0.25 × Vout [V] - 0.125) × 145
PLFY-WL32VEM-E.UK PLFY-WL40VEM-E.UK PLFY-WL50VEM-E.UK
PLFY-WL32VEM-ET.UK PLFY-WL40VEM-ET.UK PLFY-WL50VEM-ET.UK

20 21
OCH723
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
< Thermistor for lower temperature >
Temperature (:)
Resistance (k")
<Thermistor characteristic graph>
Room temperature detection thermistor
(TH21)
Pipe temperature detection thermistor/liquid
(TH22)
Pipe temperature detection thermistor/gas
(TH23)
Thermistor R0=15 k" ± 3%
Fixed number of B=3480 ± 2%
Rt=15exp { 3480 ( ) }
0:15 k"
10:9.6 k"
20:6.3 k"
25:5.4 k"
30:4.3 k"
40:3.0 k"
Thermistor for
lower temperature
1
273+t
1
273
8-1-1. Thermistor
8-1-2. Flow control valve
1) Summary of flow control valve (FCV) operation
The FCV is operated by astepping motor, which operates by receiving a pulse signal from the indoor control board.
The FCV position changes in response to the pulse signal.
Indoor control board and FCV connection
2) FCV operation
(a) Close
(b) Open
(c) Fully open valve (85 pulses)
(d) Fully close valve (770 pulses)
(e) No. of pulses
(f) Valve opening degree
(b)
(a)
(d)
(f)
(e)
(c)
M
Flow control valve Control board
Gray
White
Purple
Blue
Green
Red
Orange
Yellow
Connector (CN8A)
Drive circuit
5
3
2
1
4
6
7
8
12V
GND
Ø3
Ø1
Ø4Ø2
Limit signal
(Opening
“0” signal)
Microcomputer
5
8
4
6
7
3
2
1
Ø1
Ø1
Ø3Ø3
Ø2
Ø2
Ø4Ø4
Connector
Pulse signal output and valve operation
The output pulse changes in the following order:
When the valve closes 1 -> 2 -> 3 -> 4 -> 1
When the valve opens 4 -> 3 -> 2 -> 1 -> 4
Output (phase)
number
Output status
123 4
Ø2 ON ON OFF OFF
Ø1 OFF ON ON OFF
Ø4 OFF OFF ON ON
Ø3 ON OFF OFF ON
Parts name Check points
Disconnect the connector then measure the resistance between terminals with a tester.
Refer to "8-1-2. Flow control valve".
Flow control valve
(FCV)
Normal
55 Ω ± 5.6 Ω (at 25℃）
1-5
Purple-Brown
2-5
Orange-Brown
3-5
Blue-Brown
4-5
Green-Brown
1
2
3
4
5
6
FCV
Yellow
Orange
Red
Green
Blue
Purple
CN8A
M
7
8
White
Gray
Abnormal
Open or short
(Optional parts)