Mitsubishi Electric City Multi PKFY Series Operating manual

TECHNICAL & SERVICE MANUAL
CONTENTS
1. SAFETY PRECAUTION.......................... 2
2. PARTS NAMES AND FUNCTIONS........ 3
3. SPECIFICATION ................................... 11
4. NOISE CRITERION CURVES............... 14
5. OUTLINES AND DIMENSIONS............ 16
6. WIRING DIAGRAM............................... 18
7. REFRIGERANT SYSTEM DIAGRAM........19
8. TROUBLESHOOTING .......................... 19
9. DISASSEMBLY PROCEDURE............. 26
Indoor unit
[Model Name] [Service Ref.]
INDOOR UNIT
Model name
indication PARTS CATALOG (OCB711)
No. OCH711
October 2019
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
PKFY-WL10VLM-E PKFY-WL10VLM-E.TH
PKFY-WL15VLM-E PKFY-WL15VLM-E.TH
PKFY-WL20VLM-E PKFY-WL20VLM-E.TH
PKFY-WL25VLM-E PKFY-WL25VLM-E.TH
PKFY-WL32VLM-E PKFY-WL32VLM-E.TH
PKFY-WL40VLM-E PKFY-WL40VLM-E.TH

2 3
OCH711
1SAFETY PRECAUTION
Read before installation and performing electrical work
Symbol explanations
Do not use refrigerant other than the type indicated in the manuals pro-
vided with the unit and on the nameplate.
- Doing so may cause the unit or pipes to burst, or result in explosion or fire
during use, during repair, or at the time of disposal of the unit.
It may also be in violation of applicable laws.
MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for
malfunctions or accidents resulting from the use of the wrong type of refrig-
erant.
Ask your dealer or a qualified technician to install the unit.
- Improper installation by the user may result in water leakage, electric shock,
or fire.
Properly install the unit on a surface that can withstand its weight.
- Unit installed on an unstable surface may fall and cause injury.
Only use specified cables. Securely connect each cable so that the ter-
minals do not carry the weight of the cable.
- Improperly connected cables may produce heat and start a fire.
Take appropriate safety measures against wind gusts and earthquakes
to prevent the unit from toppling over.
- Improper installation may cause the unit to topple over and cause injury or
damage to the unit.
Only use accessories (i.e., air cleaners, humidifiers, electric heaters)
recommended by Mitsubishi Electric.
Do not make any modifications or alterations to the unit.
Consult your dealer for repair.
- Improper repair may result in water leakage, electric shock, or fire.
Do not touch the heat exchanger fins with bare hands.
- The fins are sharp and pose a risk of cuts.
Properly install the unit according to the instructions in the Installation
Manual.
- Improper installation may result in water leakage, electric shock, or fire.
Have all electrical work performed by an authorized electrician
accord-ing to the local regulations and the instructions in this manual.
Use a dedicated circuit.
- Insufficient power supply capacity or improper installation of the unit may
re-sult in malfunctions of the unit, electric shock, or fire.
- Wet electrical parts pose a risk of electric shock, smoke, or fire.
Securely attach the control box cover.
- If the cover is not installed properly, dust or water may infiltrate and pose a
risk of electric shock, smoke, or fire.
Only use the type of refrigerant that is indicated on the unit when install-
ing or relocating the unit.
- Infiltration of any other types of refrigerant or air into the unit may adversely
affect the refrigerant cycle and may cause the pipes to burst or explode.
Consult your dealer or a qualified technician when moving or reinstall-
ing the unit.
- Improper installation may result in water leakage, electric shock, or fire.
After completing the service work, check for a refrigerant leak.
- If leaked refrigerant is exposed to a heat source, such as a fan heater, stove,
or electric grill, toxic gases will be generated.
Do not try to defeat the safety features of the unit.
- Forced operation of the pressure switch or the temperature switch by defeat-
ing the safety features for these devices, or the use of accessories other than
the ones that are recommended by Mitsubishi Electric may result in smoke,
fire, or explosion.
Consult your dealer for proper disposal method.
Do not use a leak detection additive.
Precautions for handling units for use with water
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.
Only use water.
- Only use clean water as a refrigerant. The use of water outside the specifi-
cation may damage the refrigerant circuit.
Install the unit so that external force is not applied to the water pipes.
Thoroughly read the following safety precautions prior to installation.
Observe these safety precautions for your safety.
This equipment may have adverse effects on the equipment on the same power supply system.
Contact the local power authority before connecting to the system.
WARNING
This symbol indicates that failure to follow the instructions exactly as
stated poses the risk of serious injury or death.
CAUTION
This symbol indicates that failure to follow the instructions exactly as
stated poses the risk of serious injury or damage to the unit.
Indicates an action that must be avoided.
Indicates important instructions.
Indicates a parts that requires grounding.
Indicates that caution must be taken with rotating parts. (This
symbol is on the main unit label.) <Color: Yellow>
Indicates that the parts that are marked with this symbol pose
a risk of electric shock. (This symbol is on the main unit label.)
<Color: Yellow>
WARNING
Carefully read the labels affixed to the main unit.
WARNING
CAUTION
Keep electrical parts away from water.

3
OCH711
2PARTS NAMES AND FUNCTIONS
2-1. Indoor unit
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.
Filter Air intake
Vane Air outlet Louver
Front Panel
Remote control
receiving section
Operation
indicator lamp
Emergency operation
switch

4 5
OCH711
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

5
OCH711
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

6 7
OCH711
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

7
OCH711
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.

8 9
OCH711
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 (33.8°F) increments.

9
OCH711
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 control-
ler information
Use to display the remote controller model name, software version, and serial
number.

1110 11
OCH711
2-3. Wireless remote controller
Operation mode
Cool Dry
Fan
Auto
(single set
point)
Heat
Auto*
(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
function is selected.
Battery replacement indicator
Appears when the remaining bat-
tery power is low.
Vane setting
Step 1 Step 2 Step 3 Step 4 Step 5 Swing Auto
Fan speed setting
Auto
Set Temperature buttons
Weekly timer ON/OFF button*
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
Transmission area
3D i-see sensor (Air distribution)
Default Direct Indirect When Direct or In-
direct is selected,
the vane setting is
set to “Auto”.
Display
Controller interface
Note:
* This button is enabled or disabled
depending on the model of the in-
door unit.
* The initial setting is necessary.

11
OCH711 11
3SPECIFICATION
3-1. SPECIFICATIONS
Model PKFY-WL10VLM-E PKFY-WL15VLM-E PKFY-WL20VLM-E PKFY-WL25VLM-E
Power source 1-phase 220-240 V 50 Hz, 1-phase 220 V 60 Hz
Cooling capacity *1
(Nominal) *1
*1
kW 1.2 1.7 2.2 2.8
kcal/h 1000 1500 1900 2400
BTU/h 4100 5800 7500 9600
Power input kW 0.02 0.02 0.03 0.04
Current input A 0.20 0.20 0.25 0.35
Heating capacity *2
(Nominal) *2
*2
kW 1.4 1.9 2.5 3.2
kcal/h 1200 1600 2200 2800
BTU/h 4800 6500 8500 10900
Power input kW 0.01 0.01 0.02 0.03
Current input A 0.15 0.15 0.20 0.30
External nish(Munsell No.) Plastic (0.7PB 9.2/0.4)
External dimension H x W x D mm 299 × 773 × 238
in 11-25/32 x 30-7/16 x 9-3/8
Net weight kg (lb) 11(25)
Heat exchanger Cross n (Aluminum n and copper tube)
Fan Type x Quantity Line ow fan x 1
External
static press
Pa
(mmH2O) 0(0)
Motor type DC motor
Motor output kW 0.03
Driving mechanism Direct driven
Airow rate
(Low-Mid2
-Mid1-High)
m3/min 3.3-3.8-4.1-4.5 3.3-3.8-4.3-4.9 4.0-5.0-6.0-7.0 4.0-5.4-7.0-8.4
L/s 55-63-68-75 55-63-72-82 67-83-100-117 67-90-117-140
cfm 117-134-145-159 117-134-152-173 141-177-212-247 141-191-247-297
Sound pressure level
(Low-Mid2-Mid1-High)
(measured in anechoic room)
dB <A> 22-26-28-30 22-26-29-32 22-28-33-36 22-30-36-41
Insulation material Polyethylene sheet
Connectable outdoor unit HYBRID CITY MULTI/CMB-WM-V-AA, CMB-WM-V-AB/CMH-WM-V-A
Air lter PP Honeycomb
Protection device Fuse
Connection size Water Inlet in Rc3/4 screw
Water outlet in Rc3/4 screw
Field drain pipe size mm
(in) I.D.16 (5/8)
Standard attachment Installation Manual, Instruction Book
Optional parts DRAIN PUMP KIT PAC-SK01DM-E
VALVE KIT PAC-SK04VK-E
Remark Details on foundation work, duct work, insulation work, electrical wiring, power source switch, and other items shall
be referred to the Installation Manual.
Due to continuing improvement, above specications may be subject to change without notice.
Notes:
*1.Nominal cooling conditions (subject to JIS B8615-1)
Indoor: 27°CD.B./19°CW.B. (81°FD.B./66°FW.B.), Outdoor: 35°CD.B. (95°FD.B.)
Pipe length: 7.5 m (24-9/16 ft), Level difference: 0 m (0 ft)
*2.Nominal heating conditions (subject to JIS B8615-1)
Indoor: 20°CD.B. (68°FD.B.), Outdoor: 7°CD.B./6°CW.B. (45°FD.B./43°FW.B.)
Pipe length: 7.5 m (24-9/16 ft), Level difference: 0 m (0 ft)
Unit converter
kcal/h = kW × 860
Btu/h = kW × 3,412
cfm = m3/min × 35.31
lb = kg/0.4536
Note: Above specication
data is subject to
rounding variation.

12 13
OCH711
Model PKFY-WL32VLM-E PKFY-WL40VLM-E
Power source 1-phase 220-240 V 50 Hz, 1-phase 220 V 60 Hz
Cooling capacity *1
(Nominal) *1
*1
kW 3.6 4.5
kcal/h 3100 3900
BTU/h 12300 15400
Power input kW 0.04 0.05
Current input A 0.35 0.45
Heating capacity *2
(Nominal) *2
*2
kW 4.0 5.0
kcal/h 3400 4300
BTU/h 13600 17100
Power input kW 0.03 0.04
Current input A 0.30 0.40
External nish(Munsell No.) Plastic (0.7PB 9.2/0.4)
External dimension H x W x D mm 299 x 898 x 238
in 11-25/32 x 35-3/8 x 9-3/8
Net weight kg (lb) 13(29)
Heat exchanger Cross n (Aluminum n and copper tube)
Fan Type x Quantity Line ow fan x 1
External
static press
Pa
(mmH2O) 0(0)
Motor type DC motor
Motor output kW 0.03
Driving mechanism Direct driven
Airow rate
(Low-Mid2
-Mid1-High)
m3/min 6.3-7.6-9.0-10.4 6.4-8.2-10.0-11.9
L/s 105-127-150-173 107-137-167-198
cfm 222-268-318-367 226-290-353-420
Sound pressure level
(Low-Mid2-Mid1-High)
(measured in anechoic room)
dB <A> 29-34-38-41 30-36-41-45
Insulation material Polyethylene sheet
Connectable outdoor unit HYBRID CITY MULTI/CMB-WM-V-AA, CMB-WM-V-AB/CMH-WM-V-A
Air lter PP Honeycomb
Protection device Fuse
Connection size Water Inlet in Rc3/4 screw
Water outlet in Rc3/4 screw
Field drain pipe size mm
(in) I.D.16 (5/8)
Standard attachment Installation Manual, Instruction Book
Optional parts DRAIN PUMP KIT PAC-SK01DM-E
Remark Details on foundation work, duct work, insulation work, electrical
wiring, power source switch, and other items shall be referred to the
Installation Manual.
Due to continuing improvement, above specications may be subject
to change without notice.
Notes:
*1.Nominal cooling conditions (subject to JIS B8615-1)
Indoor: 27°CD.B./19°CW.B. (81°FD.B./66°FW.B.), Outdoor: 35°CD.B. (95°FD.B.)
Pipe length: 7.5 m (24-9/16 ft), Level difference: 0 m (0 ft)
*2.Nominal heating conditions (subject to JIS B8615-1)
Indoor: 20°CD.B. (68°FD.B.), Outdoor: 7°CD.B./6°CW.B. (45°FD.B./43°FW.B.)
Pipe length: 7.5 m (24-9/16 ft), Level difference: 0 m (0 ft)

13
OCH711
3-2. ELECTRICAL PARTS SPECIFICATIONS
Parts name
Service ref.
Symbol
TH21
TH22
TH23
FUSE
MF
MV1
MV2
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"
T3.15AL250V
8 X 30W / RC0J30-QD
MSFBC20 DC12V
NSEK302 DC12V
(L, N, ;) Rated to 250V 20A *
(M1, M2, S) Rated to 250V 20A *
(1, 2) Rated to 250V 10A *
Pipe temperature
detection thermistor/liquid
Pipe temperature
detection thermistor/gas
Room temperature
detection thermistor
Fuse
(Indoor controller board)
Fan motor
(with thermal fuse)
Vane motor
(Upper)
Power supply terminal
block
Transmission terminal
block
PKFY-WL10VLM-E.TH
PKFY-WL15VLM-E.TH
PKFY-WL20VLM-E.TH
PKFY-WL25VLM-E.TH
PKFY-WL32VLM-E.TH
PKFY-WL40VLM-E.TH
Vane motor
(Lower)
MA-Remote controller
terminal block
* Refer to WIRING DIAGRAM for the supplied voltage.
* Measured in anechoic room.
PKFY-WL10VLM-E.TH
PKFY-WL15VLM-E.TH
Sound pressure level dB (A)
Sound pressure level at anechoic room : Low-Middle2-Middle1-High
Service Ref.
22-26-28-30
PKFY-WL20VLM-E.TH
PKFY-WL25VLM-E.TH
PKFY-WL32VLM-E.TH
PKFY-WL40VLM-E.TH
22-28-33-36
22-30-36-41
29-34-38-41
30-36-41-45
PKFY-WL▪VLM-E
22-26-29-32
1m
Measurement location 1m
3-3. SOUND PRESSURE LEVEL

1514 15
OCH711
4NOISE CRITERION CURVES
NOISE CRITERION CURVES
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
Approximate minimum
audible limit on
continuous noise
PKFY-WL10VLM-E.TH
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70
High
FAN
Medium1
30
SPL(dB)
28
26
22
LINE
Medium2
Low
10
20
30
40
50
60
70
80
90
63 125 250 500 1000 2000 4000 8000
Approximate minimum
audible limit on
continuous noise
PKFY-WL20VLM-E.TH
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
36
SPL(dB)
33
28
22
LINE
Medium2
Low
10
20
30
40
50
60
70
80
90
63 125 250 500 1000 2000 4000 8000
Approximate minimum
audible limit on
continuous noise
PKFY-WL25VLM-E.TH
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
41
SPL(dB)
36
30
22
LINE
Medium2
Low
10
20
30
40
50
60
70
80
90
63 125 250 500 1000 2000 4000 8000
Approximate minimum
audible limit on
continuous noise
PKFY-WL15VLM-E.TH
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
32
SPL(dB)
29
26
22
LINE
Medium2
Low

15
OCH711 15
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
41
SPL(dB)
38
34
29
LINE
Medium2
Low
Approximate minimum
audible limit on
continuous noise
PKFY-WL32VLM-E.TH
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70
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
45
SPL(dB)
41
36
30
LINE
Medium2
Low
Approximate minimum
audible limit on
continuous noise
PKFY-WL40VLM-E.TH
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70

1716 17
OCH711
7.2
0
82.2
144.7 244.7
16
0 57.2
107.2 132.2 157.2 189.7
230 25 274
11
69.7
76
257.2
44.7
119.7
177.2
23.5
15
0
15
135
169.2
222.7
233.7
258.7
301.5
135
169.2
222.7
258.7
287.7
301.5
222.7
0
234.7
329
66.3
79.3
220
386.5
386.5
296
154
20
50
87
67
65
10
47
59
70
5010
65
19 70
49.5
67
5237
19952549
773
451
216.5 216.5
171
29×Ø5.1HOLE
5×Ø9HOLE
299
4×Ø4.3HOLE
383(IN PIPE)
322(OUT PIPE)
186
180
160
WATER
PIPING
OUT PIPE
Ø
12.7
IN PIPE
Ø
12.7
DRAIN HOSE CONNECTION
Ø
16(I.D)
INSULATION
Ø
29(O.D)
SLEEVE THROUGH HOLE
Ø
75
Ø
75 ～
Ø
80
INDOOR UNIT
INSTALLATION PLATE
WALL HOLE
Ø
75
FOR RIGHT BACK PIPING
WALL HOLE
Ø
75
B
C
POWER SUPPLY TERMINAL BLOCK
TRANSMISSION TERMINAL BLOCK
MA-REMOTE CONTROLLER
TERMINAL BLOCK
EMERGENCY OPERATION SWITCH(HEAT)
UNDER PIPING CUT OUT AREA
CUT OUT AREA
DRAIN PIPE
WATER PIPE,DRAIN PIPE
EMERGENCY OPERATION SWITCH(COOL)
RECEIVER
B
DETAILS OF CUT OUT FOR PIPING HOLE
A
D
C
AUTO VANES
LOUVERS(MANUAL)
TOP
FRONT
FRONT(OPEN THE GRILLE)
BOTTOM
RIGHT
OPERATING LAMP(GREEN)
STANDBY LAMP(ORANGE)
A
INSTALLATION PLATE
RIGHT PIPING CUT OUT AREA
WATER PIPE,DRAIN PIPE
1. FOR CEILING CORNICE: CONSIDER THE DIMENSION
FOR INSTALLATION.
2. MOUNTING BOLT FOR INSTALLATION PLATE: M10 OR W3/8
TAPPING SCREW: NOMINAL DIAMETER・・・ 4
LENGTH・・・ 25 MIN
SCREW TIGHT AT INSTALLATION PLATE HOLE (
Ø
4.3)
ON THE UPPER AND LOWER SIDE EVENLY. DO NOT SCREW TIGHT ONLY IN LINE.
3. 4. LEFT PIPE: THE INDOOR UNIT CANNOT BE INSTALLED
WITH LEFT PIPING.
5. DRAIN PIPE EFFECTIVE LENGTH ・・・ 500
CUT OUT AREA
DRAIN PIPE
D
LEFT
TEMPORARILY FIXING HOLE
DRAIN HOSE
AIR PURGE VALVE COVER
250 MIN.
55 MIN.
7 MIN.
260 MIN.
150 MIN.
50 MIN.
REQUIRED SPACE(INDOOR UNIT)
AIR INLET
AIR OUTLET
IN CASE OF OPTIONAL
DRAIN PUMP INSTALLATION,
250 MIN.
IN CASE OF OPTIONAL
DRAIN PUMP INSTALLATION,
75 MIN.
IN CASE OF OPTIONAL DRAIN PUMP INSTALLATION,
350 MIN
OUTLINES AND DIMENSIONS
5
PKFY-WL10VLM-E.TH PKFY-WL15VLM-E.TH
PKFY-WL20VLM-E.TH PKFY-WL25VLM-E.TH
Unit: mm

17
OCH711 17
PKFY-WL32VLM-E.TH PKFY-WL40VLM-E.TH
Unit: mm
15
0
125
165
231.7
274.2
321.2
350.2
364
15
125
165
231.7
285.2
321.2
350.2
364
7.2
0
16
32.2
76
107.2 132.2 157.2 244.7 257.2
44.7
119.7
287.2
0
391.5
449
128.8
141.8
282.5
449
213 0 274 25
69.7
123.5 177.2
57.2 82.2
189.7
23.5
25
212
238
29×Ø5.1HOLE
5×Ø9HOLE
4×Ø4.3HOLE
138
188
322(IN PIPE)
272(OUT PIPE)
460
75
460
75
230
213
213
50
87
67
65
10
47
59
70
5010
65
19 70
49.5
67
5
49 650 199
898
299
576
279 279
237
163
160
SLEEVE THROUGH HOLE
Ø
100
Ø
100 ～
Ø
105
Ø
75
Ø
75 ～
Ø
80
WATER
PIPING
IN PIPE
Ø
15.88
OUT PIPE
Ø
15.88
DRAIN HOSE CONNECTION
Ø
16 (I.D)
INSULATION
Ø
29(O.D)
A
B
C
D
WALL HOLE
Ø
100
FOR RIGHT BACK PIPING
INDOOR UNIT
INSTALLATION PLATE
WALL HOLE
Ø
75
INSTALLATION PLATE
POWER SUPPLY TERMINAL BLOCK
TRANSMISSION TERMINAL BLOCK
MA-REMOTE CONTROLLER TERMINAL BLOCK
UNDER PIPING CUT OUT AREA
CUT OUT AREA
DRAIN PIPE
WATER PIPE,DRAIN PIPE
CUT OUT AREA
DRAIN PIPE
RIGHT PIPING CUT OUT AREA
WATER PIPE,DRAIN PIPE
RECEIVER
OPERATING LAMP(GREEN)
STANDBY LAMP(ORANGE)
AUTO VANES
LOUVERS(MANUAL)
TOP
FRONT
FRONT(OPEN THE GRILLE)
BOTTOM
LEFT RIGHT
EMERGENCY OPERATION SWITCH(HEAT)
EMERGENCY OPERATION SWITCH(COOL)
TEMPORARILY FIXING HOLE
DETAILS OF WATER PIPE
IN PIPE
OUT PIPE
1. FOR CEILING CORNICE: CONSIDER THE DIMENSION
FOR INSTALLATION.
2. MOUNTING BOLT FOR INSTALLATION PLATE: M10 OR W3/8
TAPPING SCREW: NOMINAL DIAMETER・・・ 4 LENGTH・・・ 25 MIN SCREW TIGHT AT INSTALLATION PLATE HOLE (
Ø
4.3)
ON THE UPPER AND LOWER SIDE EVENLY. DO NOT SCREW TIGHT ONLY IN LINE.
3. 4. LEFT PIPE: THE INDOOR UNIT CANNOT BE INSTALLED
WITH LEFT PIPING.
5. DRAIN PIPE EFFECTIVE LENGTH ・・・ 500
DRAIN HOSE
AIR PURGE VALVE COVER
B
DETAILS OF CUT OUT FOR PIPING HOLE
A
DC
250 MIN.
55 MIN.
7 MIN.
260 MIN.
150 MIN.
50 MIN.
REQUIRED SPACE(INDOOR UNIT)
AIR INLET
AIR OUTLET
IN CASE OF OPTIONAL
DRAIN PUMP INSTALLATION,
250 MIN.
IN CASE OF OPTIONAL DRAIN PUMP INSTALLATION,
350 MIN
IN CASE OF OPTIONAL
DRAIN PUMP INSTALLATION,
250 MIN.

18 19
OCH711
WIRING DIAGRAM6
M
MV1
OFF
ON
OFF
ON
1234567890
SW3SW22
1234
M
MV2
1
2
15
16
LED1
OFF
ON
123456
SW2
1
2
11
12
POWER SUPPLY
~/N 220-240V 50Hz
220V 60Hz
TH21 TH22 TH23
t° t° t°
1
5
LED2
4
1
2
TB15
L
N
TB2
TO MA- REMOTE
CONTROLLER
DC8.7-13V
10
5
5
GNYE
TO NEXT
INDOOR
UNIT
PULL
BOX
FUSE(16A)
BREAKER
(16A)
BK BU RD
5 5
21
12
I.B
OFF ON
BZ1
CNMF
(WH)
1 74
CNAD
(WH)
1 4
CN4F
(WH)
CN32
(WH)
CN20
(RD)
CN44
(WH)
121 4
CNSB
(BK)
CNSA
(WH)
CN41 (WH)
5
1
CN51 (WH)
1
5
1
CN52 (GN)
CN8A
(WH)
CN105
(RD)
SWE
1 3
1 6
1
8
CN2M
(WH)
CNP
(WH)
CN2A
(BU)
CND
(BK) CNRU (WH)
MS
3~
MF
110
~
~
CN24
(YE)
CNV
(WH)
F1
1 3 5
M
FCV
3
3
8
V.K
13
See fig: *1
L.B
LED1 LED2
CN302
(WH)
1
4
3
3
9 12
REC1
SWE2 SWE1
CN303
(WH)
3
1
3
1
CN301
(BU)
3
W.B
S.B
When attaching drain
pump(option), remove
the jumper connector
CN4F and fit the drain
float switch (FS).
FLOAT SW
CN4F (WH)
FS
14
When attaching drain pump
(option)
D.P
TO OUTDOOR UNIT
HBC/ HYDRO UNIT
ME REMOTE
CONTROLLER
DC24-30V
1 4
1 8
4
8
OFF ON
1
2
3
4
5
6
7
8
9
10
SW1
A.B
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
SW14
SW11
SW12
10s DIGIT
1s DIGIT
BRANCH No.
CN43
(RD)
SWA
CN82
(RD)
6
When attaching VALVE KIT(option),
remove the jumper connector
CN8A and fit the FLOW CONTROL
VALVE (FCV).
1 2 3
M1
M2
S
TB5
Models
WL10
SW2
654321
OFF
ON
654321
OFF
ON
654321
OFF
ON
WL15
WL20
<fig: *1>
The black square (■) indicates
a switch position.
Models SW2
654321
OFF
ON
654321
OFF
ON
654321
OFF
ON
WL25
WL32
WL40
1
6
3
PS2
PS1
3 3
33
2 13 1
MS
3~
DP
31
D.P
3
3
(SHIELD)
SYMBOL NAME
I.B INDOOR CONTROLLER BOARD
BZ1
CN32
CN51
CN52
CN105
CONNECTOR
BUZZER
REMOTE SWITCH
A.B ADDRESS BOARD
S.B SWITCH BOARD
W.B PCB FOR WIRELESS REMOTE CONTROLLER
SW1
SW11
SW12
MODE SELECTION
ADDRESS SETTING 1s DIGIT
SWE1
SWE2
EMERGENCY OPERATION(HEAT)
EMERGENCY OPERATION(COOL)
RECEIVING UNIT
ADDRESS SETTING 10s DIGIT
SW14 BRANCH No.
CENTRALLY CONTROL
REMOTE INDICATION
IT TERMINAL
SWITCH
F1 FUSE (T3.15AL250V)
LED1 POWER SUPPLY (I.B)
LED2
REC1
POWER SUPPLY (MA-REMOTE CONTROLLER)
SYMBOL NAME
TH21
MF
MV2
THERMISTOR ROOM TEMP. DETECTION
(0°C/15kΩ, 25°C/5.4kΩ)
PIPE TEMP. DETECTION / INLET
WATER (0°C/15kΩ, 25°C/5.4kΩ)
PIPE TEMP. DETECTION / OUTLET
WATER (0°C/15kΩ, 25°C/5.4kΩ)
TH22
TH23
FAN MOTOR
VANE MOTOR (LOWER)
TB2
TB5
TB15
TRANSMISSION
MA-REMOTE CONTROLLER
TERMINAL
BLOCK
POWER SUPPLY
SW2
SW3
SW22
SWE
CAPACITY CODE
MODE SELECTION
PAIR NO. SETTING
FAN•DRAIN PUMP (TEST MODE)
SWITCH
V.K VALVE KIT (OPTION)
FCV
PS1
PS2
FLOW CONTROL VALVE
PRESSURE SENSOR 1 (INLET WATER)
PRESSURE SENSOR 2 (OUTLET WATER)
MV1 VANE MOTOR (UPPER)
L.B LED BOARD
LED1
LED2
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 M-NET, 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 above are, : terminal
block, :connecter.
6.The setting of the SW2 dip switches differs in the capacity.
For the detail, refer to the fig : *1.
Symbol Meaning Function
Power supply for
MA-Remote controller
Main power supply (Indoor unit:220-240V)
Power on → Iamp is lit
LED on indoor controller board for service
LED1 Main power supply
Power supply for MA-Remote controller
on → Iamp is lit
LED2
LED(OPERATING INDICATOR:GREEN)
LED(STANDBY FOR HEATING : ORANGE )
D.P DRAIN PUMP KIT (OPTION)
DRAIN FLOAT SWITCH
FS
DRAIN PUMP
DP
PKFY-WL10VLM-E.TH PKFY-WL15VLM-E.TH
PKFY-WL20VLM-E.TH PKFY-WL25VLM-E.TH
PKFY-WL32VLM-E.TH PKFY-WL40VLM-E.TH

19
OCH711
7REFRIGERANT SYSTEM DIAGRAM
Heat exchanger
Room temperature
detection thermistor TH21
Pipe temperature detection
thermistor/ inlet
TH22
Water inlet
connection
Manual air purge valve
Water inlet
Water outlet
Rc3/4 screw
Rc3/4 screw
Item Model
Pipe temperature detection
thermistor/ outlet
TH23
Water outlet
connection
PKFY-WL10/15/20/25/32/40VLM-E
Unit: in
PKFY-WL10VLM-E.TH PKFY-WL15VLM-E.TH
PKFY-WL20VLM-E.TH PKFY-WL25VLM-E.TH
PKFY-WL32VLM-E.TH PKFY-WL40VLM-E.TH
TROUBLESHOOTING
8
8-1. HOW TO CHECK THE PARTS
PKFY-WL10VLM-E.TH PKFY-WL15VLM-E.TH
PKFY-WL20VLM-E.TH PKFY-WL25VLM-E.TH
PKFY-WL32VLM-E.TH PKFY-WL40VLM-E.TH
Parts name Check points
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10 to 30:)
Disconnect the connector then measure the resistance between terminals with a tester.
Refer to the next page for details.
Vane motor (MV1)
Flow control valve
(FCV)
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 to 9.6 k"
Normal
55 "±5.6 "(at 25℃）
1-5
Yellow-Blue
2-5
Orange-Blue
3-5
Red-Blue
4-5
Green-Blue
Measure the resistance between the terminals with a tester. (At the ambient temperature 25:)
Normal
300 "±7%
-9
Red-Sky Blue
-8
Red-Sky Blue
-7
Red-Sky Blue
-6
Red-Sky Blue
Refer to “8-1-3. DC Fan motor (fan motor/indoor controller board)
Fan motor (MF)
Abnormal
Other than short
Other than open
Other than short
State of moving part
UP
DOWN
–
Normal
Short
Open
Short
Sky Blue
Sky Blue
Red
Sky
Blue
7
9
10
6 8
Connector(CNV)
pin No.
M
1
2
3
4
5
6
FCV
Yellow
Orange
Red
Green
Blue
Purple
CN8A
Sky
Blue
10 10 10 10
Vane motor
(Lower (MV2)) Measure the resistance between the terminals with a tester. (At the ambient temperature 25:)
Normal
300 ±26.3 "
5-4
Red-Sky Blue
5-3
Red-Sky Blue
5-2
Red-Sky Blue
5-1
Red-Sky Blue
Sky Blue
Sky Blue
Red
Sky
Blue
2
4
5
31
M
Connector(CNV)
pin No.
Sky
Blue
Drain pump (DP)
Drain float
switch (FS)
1Check if the drain float switch works properly.
2Check if the drain pump works and drains water properly in cooling operation.
3If 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, so it is not possible to
measure the resistance between the terminals.
Normal
Red–Black: Input 13 V DC → The pump motor starts to rotate.
Measure the resistance between the terminals with a tester.
RD
VT
BK
1
2
3
2
1
Moving part
4
3
Switch
Magnet
Moving
Part
(Optional parts)
(Optional parts)
Drain float switch
connector terminal
1(+) – 2(-)
1(+) – 2(-)
3(+) – 4(-)
M
7
8
White
Gray
Abnormal
Open or short
(Optional parts)

20 21
OCH711
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
1Summary of flow control valve (FCV) operation
• The FCV is operated by a stepping 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
1
273+t
1
273
8-1-1. Thermistor
8-1-2. Flow control valve (FCV)
Parts name Check points
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
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)
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
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