Mitsubishi Electric PKFY Series Operating manual

TECHNICAL & SERVICE MANUAL
CONTENTS
1. SAFETY PRECAUTION.......................... 2
2. PARTS NAMES AND FUNCTIONS........ 4
3. SPECIFICATION ................................... 12
4. NOISE CRITERION CURVES............... 15
5. OUTLINES AND DIMENSIONS............ 17
6. WIRING DIAGRAM............................... 19
7. REFRIGERANT SYSTEM DIAGRAM........20
8. MICROPROCESSOR CONTROL......... 20
9. TROUBLESHOOTING .......................... 27
10. DISASSEMBLY PROCEDURE........... 35
Indoor unit
[Model Name] [Service Ref.]
INDOOR UNIT
R410A
Model name
indication PARTS CATALOG (OCB715)
No. OCH715
March 2020
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
PKFY-P04NLMU-E PKFY-P04NLMU-E.TH
PKFY-P06NLMU-E PKFY-P06NLMU-E.TH
PKFY-P08NLMU-E PKFY-P08NLMU-E.TH
PKFY-P12NLMU-E PKFY-P12NLMU-E.TH
PKFY-P15NLMU-E PKFY-P15NLMU-E.TH
PKFY-P18NLMU-E PKFY-P18NLMU-E.TH
Note:
• This manual describes
service data of the indoor
units only.

32 3
OCH715
1SAFETY PRECAUTION
Cautions for units utilizing refrigerant R410A
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.
Handle tools with care.
If dirt, dust or moisture enters 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 enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enters, 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.
Store the piping indoors, and both ends of the
piping sealed until just before brazing.
(Leave elbow joints, etc. in their packaging.)
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Use the specified refrigerant only.
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the
unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the
spec labels provided with our products.
We will not be held responsible for mechanical failure,
system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.

3
OCH715 3
[1] Cautions for service
(1) Perform service after collecting the refrigerant left in the 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
(1) Check that cylinder for R410A on the market is syphon type.
(2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Electronic weighing scale
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
1Gauge manifold · Only for R410A
· Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 768.7 PSIG [5.3MPa.G] or over.
2Charge hose · Only for R410A
· Use pressure performance of 738.2 PSIG [5.09MPa.G] or over.
3Electronic weighing 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 —

54 5
OCH715
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

5
OCH715 5
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.
▌1[ON/OFF] button
Press to turn ON/OFF the indoor unit.
▌2[SELECT/HOLD] button
Press to save the setting.
When the Main menu is displayed, pressing this button will
enable/disable the HOLD function.
▌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
Function buttons
MENU
ON
OFF
RETURN SELECT
HOLD
83
83
Fri
Room
Set temp.
Mode Temp. Fan
Cool Auto
Main Main menu
Energy saving
Main menu: RETURN
Cursor
Operation
Vane·Louver·Vent. (Lossnay)
High power
Comfort
Main menuMain display
Menu screen
7 8 9 0
7 8 9 0
7 8 9 0
Function guide

6 7
OCH715
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.
<Basic mode>
▌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
Fri
Mode Temp. Fan
Room
Cool Set temp. Auto
83
83
1
2
3
4
5
6
78
90
1
2 34 5 6 7 8
9
)
@
!
#
$
Fri
Cool
Mode Temp. Fan
Set temp. Auto
$
83
5
4
3
2
1
#

7
OCH715
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.
Setback mode

8 9
OCH715
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.

9
OCH715
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."
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.
*233.8°F (1°C) increments.

10 11
OCH715
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 pass-
word
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, and
use to change the background colors of the display to black.
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.
Setback mode Whether or not to use the Setback mode can be selected by using the button.
This setting is valid only when indoor units with the Setback 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 pass-
word
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.

11
OCH715
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.
Refer to 4) in 3.2.

1312 13
OCH715
3SPECIFICATION
3-1. SPECIFICATIONS
Model PKFY-P04NLMU-E PKFY-P06NLMU-E PKFY-P08NLMU-E
Power source 1-phase 208-230 V 60 Hz
Cooling capacity *1
(Nominal) *1
kW 1.1 1.8 2.3
BTU/h 4000 6000 8000
Power input kW 0.02 0.02 0.03
Current input A 0.20 0.20 0.25
Heating capacity *2
(Nominal) *2
kW 1.3 2.0 2.6
BTU/h 4500 6700 9000
Power input kW 0.01 0.01 0.02
Current input A 0.15 0.15 0.20
External nish(Munsell No.) Plastic (0.7PB 9.2/0.4)
External dimension H x W x D inch 11-25/32 x 30-7/16 x 9-11/32
mm 299 × 773 × 237
Net weight lb (kg) 23.6 (10.7) 24.5(11.1)
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 3.3-3.5-3.8-4.2 4.0-4.4-4.9-5.4 4.0-4.6-5.4-6.7
L/s 55-58-63-70 67-73-82-90 67-77-90-112
cfm 117-124-134-148 141-155-173-191 141-162-191-237
Noise level
(Low-Mid2-Mid1-High)
(measured in anechoic room)
dB <A> 22-24-26-28 22-26-29-31 22-27-31-35
Insulation material Polyethylene sheet
Air lter PP Honeycomb
Protection device Fuse
Refrigerant control device LEV
Connectable outdoor unit R410A CITY MULTI
Diameter of
refrigerant pipe
Liquid in
(mm) {1/4 ({6.35)
Gas in
(mm) {1/2 ({12.7)
Field drain pipe size in
(mm) I.D. 5/8 (16)
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: 81°FD.B./66°FW.B. (27°CD.B./19°CW.B.), Outdoor: 95°FD.B. (35°CD.B.)
Pipe length: 24-9/16 ft (7.5 m), Level difference: 0 ft (0 m)
*2.Nominal heating conditions (subject to JIS B8615-1)
Indoor: 68°FD.B. (20°CD.B.), Outdoor: 45°FD.B./43°FW.B. (7°CD.B./6°CW.B.)
Pipe length: 24-9/16 ft (7.5 m), Level difference: 0 ft (0 m)
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.

13
OCH715 13
Model PKFY-P12NLMU-E PKFY-P15NLMU-E PKFY-P18NLMU-E
Power source 1-phase 208-230 V 60 Hz
Cooling capacity *1
(Nominal) *1
kW 3.5 4.4 5.3
BTU/h 12000 15000 18000
Power input kW 0.04 0.04 0.05
Current input A 0.35 0.35 0.45
Heating capacity *2
(Nominal) *2
kW 4.0 5.0 5.9
BTU/h 13500 17000 20000
Power input kW 0.03 0.03 0.04
Current input A 0.30 0.30 0.40
External nish(Munsell No.) Plastic (0.7PB 9.2/0.4)
External dimension H x W x D inch 11-25/32 x 30-7/16 x 9-11/32 11-25/32 x 35-3/8 x 9-11/32
mm 299 × 773 × 237 299 x 898 x 237
Net weight lb (kg) 24.5 (11.1) 28.4 (12.9)
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 4.3-5.4-6.9-8.4 6.3-7.4-8.6-10.0 6.8-8.3-10.2-12.4
L/s 72-90-115-140 105-123-143-167 113-138-170-207
cfm 152-191-244-297 222-261-304-353 240-293-360-438
Noise level
(Low-Mid2-Mid1-High)
(measured in anechoic room)
dB <A> 24-31-37-41 29-34-37-40 31-36-41-46
Insulation material Polyethylene sheet
Air lter PP Honeycomb
Protection device Fuse
Refrigerant control device LEV
Connectable outdoor unit R410A CITY MULTI
Diameter of
refrigerant pipe
Liquid in
(mm) {1/4 ({6.35)
Gas in
(mm) {1/2 ({12.7)
Field drain pipe size in
(mm) I.D. 5/8 (16)
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: 81°FD.B./66°FW.B. (27°CD.B./19°CW.B.), Outdoor: 95°FD.B. (35°CD.B.)
Pipe length: 24-9/16 ft (7.5 m), Level difference: 0 ft (0 m)
*2.Nominal heating conditions (subject to JIS B8615-1)
Indoor: 68°FD.B. (20°CD.B.), Outdoor: 45°FD.B./43°FW.B. (7°CD.B./6°CW.B.)
Pipe length: 24-9/16 ft (7.5 m), Level difference: 0 ft (0 m)

1514 15
OCH715
3-2. ELECTRICAL PARTS SPECIFICATIONS
Parts name
Service ref.
Symbol
TH21
TH22
TH23
FUSE
MF
MV1
MV2
LEV
TB2
TB5
TB15
Resistance 32°F/15 k", 50°F/9.6 k", 68°F/6.3 k", 77°F/5.4 k", 86°F/4.3 k", 104°F/3.0 k"
Resistance 32°F/15 k", 50°F/9.6 k", 68°F/6.3 k", 77°F/5.4 k", 86°F/4.3 k", 104°F/3.0 k"
Resistance 32°F/15 k", 50°F/9.6 k", 68°F/6.3 k", 77°F/5.4 k", 86°F/4.3 k", 104°F/3.0 k"
T3.15AL250V
8 X 30W / RC0J30-QD
NSEK302 DC12V
MSBPC20 DC12V
(L1,L2) 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)
Linear expansion valve
Power supply terminal
block
Transmission terminal
block
DC12V Stepping motor drive
Port [3/32 (P04), [7/64 (P06/08/12/15/18) (0-2000pulse)
PKFY-P04NLMU-E.TH
PKFY-P06NLMU-E.TH
PKFY-P08NLMU-E.TH
Vane motor
(Lower)
MA-Remote controller
terminal block
PKFY-P12NLMU-E.TH
PKFY-P15NLMU-E.TH
PKFY-P18NLMU-E.TH
* Refer to WIRING DIAGRAM for the supplied voltage.

15
OCH715 15
4NOISE CRITERION CURVES
NOISE CRITERION 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
PKFY-P04NLMU-E
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB（0dB=0.0002μbar)
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-P06NLMU-E
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB（0dB=0.0002μbar)
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-P08NLMU-E
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB（0dB=0.0002μbar)
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-P12NLMU-E
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB（0dB=0.0002μbar)

1716 17
OCH715
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-P15NLMU-E
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB（0dB=0.0002μbar)
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-P18NLMU-E
NC-60
NC-50
NC-40
NC-20
NC-30
NC-70
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB（0dB=0.0002μbar)

17
OCH715 17
9/32(7.2)
0
3-15/64(82.2)
5-45/64(144.7)
9-41/64(244.7)
5/8(16) 0 2-1/4(57.2) 4-7/32(107.2) 5-13/64(132.2)
6-3/16(157.2)
7-15/32(189.7) 9-1/16(230)
63/64(25)
10-25/32(274)
7/16(11)
2-3/4(69.7)
2-63/64(76)
10-1/8(257.2)
1-49/64(44.7)
4-23/32(119.7)
6-31/32(177.2)
59/64(23.5)
19/32(15)
0
19/32(15)
5-5/16(135)
6-21/32(169.2)
8-49/64(222.7)
9-13/64(233.7)
10-3/16(258.7)
11-7/8(301.5)
5-5/16(135)
6-21/32(169.2)
8-49/64(222.7)
10-3/16(258.7)
11-21/64(287.7)
11-7/8(301.5)
(222.7)
8-49/64
0
(234.7)
9-15/64
12-61/64(329)
(66.3)
2-39/64
(79.3)
3-1/8
(220)
8-21/32
(386.5)
15-7/32
(386.5)
15-7/32
11-21/32(296)
(154)
6-1/16
25/32(20)
1-21/32(50)
3-27/64(87)
(67)
2-41/64
2-9/16(65)
25/64(10)
1-27/32
(47)
(59)
2-21/64
(70)
2-3/4
(50)
1-31/32
25/64(10)
2-9/16(65)
3/4(19) 2-3/4(70)
1-61/64(49.5)
(67)
2-41/64
13/64(5)9-11/32(237)
7-53/64(199)20-43/64(525)1-59/64(49)
30-7/16(773)
6-19/64(160)
7-1/64(178)
16-21/32(423)(LIQUID PIPE)
14-11/64(360)(GAS PIPE)
7-9/16(192)
(451)
17-3/4
(216.5)
8-17/32
(216.5)
8-17/32
9-27/32(250) MIN.
1-31/32(50) MIN.
9/32(7) MIN.
10-15/64(260) MIN.
5-29/32(150) MIN.
1-31/32(50) MIN.
(171)
6-47/64
29× Ø 13/64 (Ø5.1HOLE)
5×Ø23/64( Ø9HOLE)
11-25/32(299)
4× Ø 11/64(Ø4.3HOLE)
(330)
12-63/64
SLEEVE THROUGH HOLE
Ø2-61/64
(Ø 75)
Ø2-61/64
～
Ø3-5/32
(Ø 75 ～ Ø80)
REFRIGERANT PIPING
LIQUID PIPE
Ø
1/4(
Ø
6.35)
GAS PIPE
Ø
1/2(
Ø
12.7)
DRAIN HOSE CONNECTION
Ø
5/8(
Ø
16)
INSULATION
Ø
1-9/64(
Ø
29)
INDOOR UNIT
INSTALLATION PLATE
WALL HOLE Ø2-61/64(Ø75)
FOR RIGHT BACK PIPING
WALL HOLE Ø2-61/34( Ø75)
FOR LEFT BACK PIPING
B
C
POWER SUPPLY TERMINAL BLOCK
TRANSMISSION TERMINAL BLOCK
MA-REMOTE CONTROLLER
TERMINAL BLOCK
EMERGENCY OPERATION SWITCH(HEAT)
UNDER PIPING CUT OUT AREA
UNDER PIPING CUT OUT AREA
REFRIGERANT PIPE,DRAIN PIPE
REFRIGERANT 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
REFRIGERANT PIPE,DRAIN PIPE
REQUIRED SPACE(INDOOR UNIT)
AIR INLET
AIR OUTLET
IN CASE OF OPTIONAL
DRAIN PUMP INSTALLATION,
9-27/32(250) MIN.
IN CASE OF LEFT PIPING,
LEFT BACK PIPING,2-11/64(55) MIN.
OR OPTIONAL DRAIN PUMP
INSTALLATION,2-61/64(75) MIN.
IN CASE OF OPTIONAL DRAIN PUMP INSTALLATION,
13-25/32(350) MIN.
1. FOR CEILING CORNICE: CONSIDER THE DIMENSION
FOR INSTALLATION.
2. MOUNTING BOLT FOR INSTALLATION PLATE: M10 OR W3/8
TAPPING SCREW: NOMINAL DIAMETER･･･5/32(4) LENGTH･･･63/64(25) MIN SCREW TIGHT AT INSTALLATION PLATE HOLE { 11/64(Ø 4.3) } ON THE UPPER AND LOWER SIDE EVENLY. DO NOT SCREW TIGHT ONLY IN LINE.
3. 4. LEFT PIPE: CONNECT DRAIN HOSE TO CONNECTION PORT
ON THE LEFT SIDE OF DRAIN PAN.
EXCHANGE DRAIN HOSE AND RUBBER CAP
AND BUTT THEM AGAINST DRAIN PORT.
5. DRAIN PIPE EFFECTIVE LENGTH ･･･ 19-11/16(500)
LEFT PIPING CUT OUT AREA
REFRIGERANT PIPE,DRAIN PIPE
D
LEFT
TEMPORARILY FIXING HOLE
DRAIN HOSE
WALL HOLE Ø2-61/64( Ø75)
FOR RIGHT BACK CONDIT CABLE
OUTLINES AND DIMENSIONS
5
PKFY-P04NLMU-E.TH PKFY-P06NLMU-E.TH
PKFY-P08NLMU-E.TH PKFY-P12NLMU-E.TH
Unit: inch(mm)

1918 19
OCH715
19/32(15)
0
4-59/64(125)
6-1/2(165)
9-1/8(231.7)
10-51/64(274.2)
12-41/64(321.2)
13-25/32(350.2)
14-21/64(364)
19/32(15)
4-59/64(125)
6-1/2(165)
(231.7)
10-51/64
11-15/64(285.2)
12-41/64(321.2)
13-25/32(350.2)
14-21/64(364)
9/32(7.2)
0
5/8(16)
1-17/64(32.2)
2-63/64(76)
4-7/32(107.2)
5-13/64(132.2)
6-3/16(157.2)
9-41/64(244.7)
10-1/8(257.2)
1-49/64(44.7)
4-23/32(119.7)
11-1/4(287.2)
0
15-13/32(391.5)
17-43/64(449)
5-5/64(128.8)
5-37/64(141.8)
11-1/8(282.5)
(449)
17-43/64
9-1/16(230) 0
10-25/32(274)
63/64(25)
2-3/4(69.7) 4-55/64(123.5)
6-31/32(177.2)
2-1/4(57.2) 3-15/64(82.2) 7-15/32(189.7)
13/64(5)
20-63/64(533)(LIQUID PIPE)
17-23/32(450)(GAS PIPE)
1-59/64(49) 25-19/32(650) 7-53/64(199)
35-23/64(898)
7-1/64(178)
7-9/16(192)
11-25/32(299)
(250)
9-27/32 MIN.
1-31/32(50) MIN.
59/64(23.5)
63/64(25)
8-11/32(212)
9-3/8(238)
22-43/64(576)
10-63/64(279) 10-63/64(279)
9/32(7) MIN.
9-11/32(237)
6-19/64(160)
(163)
6-27/64
10-15/64(260) MIN.
5-29/32(150) MIN.
1-31/32(50) MIN.
1-21/32(50)
3-27/64(87)
(67)
2-41/64
2-9/16(65)
25/64(10)
(47)
1-27/32
(59)
2-21/64
(70)
2-3/4
(50)
1-31/32
25/64(10)
2-9/16(65)
3/4(19) 2-3/4(70)
1-61/64(49.5)
(67)
2-41/64
29×Ø13/64( Ø5.1HOLE)
5×Ø23/64(Ø9HOLE)
4×Ø11/64( Ø4.3HOLE)
(392.5)
15-29/64
SLEEVE THROUGH HOLE
Ø2-61/64
( Ø75)
Ø2-61/64～ Ø3-5/32
( Ø75 ～ Ø80)
REFRIGERANT PIPING
LIQUID PIPE Ø1/4( Ø6.35)
GAS PIPE Ø1/2( Ø12.7)
DRAIN HOSE CONNECTION Ø5/8( Ø16)
INSULATION Ø1-9/64( Ø29)
A
B
C
D
INDOOR UNIT
INSTALLATION PLATE
REQUIRED SPACE(INDOOR UNIT)
AIR INLET
AIR OUTLET
INSTALLATION PLATE
POWER SUPPLY TERMINAL BLOCK
TRANSMISSION TERMINAL BLOCK
MA-REMOTE CONTROLLER TERMINAL BLOCK
UNDER PIPING CUT OUT AREA
UNDER PIPING CUT OUT AREA
REFRIGERANT PIPE,DRAIN PIPE
REFRIGERANT PIPE,DRAIN PIPE
LEFT PIPING CUT OUT AREA
REFRIGERANT PIPE,DRAIN PIPE
RIGHT PIPING CUT OUT AREA
REFRIGERANT 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
DRAIN HOSE
B
DETAILS OF CUT OUT FOR PIPING HOLE
A
D
C
IN CASE OF OPTIONAL
DRAIN PUMP INSTALLATION,
9-27/32(250) MIN.
IN CASE OF LEFT PIPING,
LEFT BACK PIPING,2-11/64(55) MIN.
OR OPTIONAL DRAIN PUMP
INSTALLATION,2-61/64(75) MIN.
IN CASE OF OPTIONAL DRAIN PUMP INSTALLATION,
13-25/32(350) MIN.
1. FOR CEILING CORNICE: CONSIDER THE DIMENSION
FOR INSTALLATION.
2. MOUNTING BOLT FOR INSTALLATION PLATE: M10 OR W3/8
TAPPING SCREW: NOMINAL DIAMETER・・・ 5/32(4) LENGTH・・・ 63/64(25) MIN SCREW TIGHT AT INSTALLATION PLATE HOLE { 11/64(Ø 4.3) }
ON THE UPPER AND LOWER SIDE EVENLY. DO NOT SCREW TIGHT ONLY IN LINE.
3. 4. LEFT PIPE: CONNECT DRAIN HOSE TO CONNECTION PORT
ON THE LEFT SIDE OF DRAIN PAN.
EXCHANGE DRAIN HOSE AND RUBBER CAP
AND BUTT THEM AGAINST DRAIN PORT.
5. DRAIN PIPE EFFECTIVE LENGTH ・・・ 19-11/16(500)
WALL HOLE Ø2-61/64(Ø75)
FOR RIGHT BACK PIPING
WALL HOLE Ø2-61/64(Ø75)
FOR RIGHT BACK CONDIT CABLE
WALL HOLE Ø2-61/34(Ø75)
FOR LEFT BACK PIPING
PKFY-P15NLMU-E.TH PKFY-P18NLMU-E.TH
Unit: inch(mm)

19
OCH715 19
WIRING DIAGRAM6
SYMBOL NAME
I.B INDOOR CONTROLLER BOARD
BZ1
CN32
CN51
CN52
CN105
BUZZER
REMOTE SWITCH
CN24
CONNECTOR
EXTERNAL HEATER
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
D.P DRAIN PUMP KIT (OPTION)
DRAIN FLOAT SWITCH
FS
REC1
POWER SUPPLY (MA-REMOTE CONTROLLER)
SYMBOL NAME
TH21
MF
MV2
THERMISTOR ROOM TEMP. DETECTION
(0°C/15kΩ, 25°C/5.4kΩ) (32°F/15kΩ, 77°F/5.4kΩ)
PIPE TEMP. DETECTION / LIQUID
(0°C/15kΩ, 25°C/5.4kΩ) (32°F/15kΩ, 77°F/5.4kΩ)
PIPE TEMP. DETECTION / GAS
(0°C/15kΩ, 25°C/5.4kΩ) (32°F/15kΩ, 77°F/5.4kΩ)
LEV LINEAR EXPANSION VALVE
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
DRAIN PUMP
DP
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:208/230V)
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 )
PKFY-P04NLMU-E.TH PKFY-P06NLMU-E.TH PKFY-P08NLMU-E.TH
PKFY-P12NLMU-E.TH PKFY-P15NLMU-E.TH PKFY-P18NLMU-E.TH

2120 21
OCH715
7REFRIGERANT SYSTEM DIAGRAM
Strainer
(#100mesh)
Strainer
(#100mesh)
Strainer
(#50mesh)
Heat exchanger
Room temperature detection thermistor
(TH21)
Pipe temperature detection thermistor/gas
(TH23)
Pipe temperature detection thermistor/liquid
(TH22)
Gas pipe
Liquid pipe
Flare
Linear expansion
valve
Gas distributor
Liquid distributor
C/T
Unit: inch (mm)
Gas pipe {1/2” (12.7)
Liquid pipe {1/4” (6.35)
PKFY-P04NLMU-E.TH PKFY-P06NLMU-E.TH PKFY-P08NLMU-E.TH
PKFY-P12NLMU-E.TH PKFY-P15NLMU-E.TH PKFY-P18NLMU-E.TH
MICROPROCESSOR CONTROL8
<How to operate>
1 Press POWER ON/OFF button.
2 Press the operation MODE button to display COOL.
3 Press the TEMP. button to set the set temperature.
NOTE: The set temperature changes 1°F when the or
button is pressed one time. Cooling 67 to 87°F
<How to operate>
1 Press ON/OFF button.
2 Press [F1] button to display COOL.
3 Press [F2] [F3] button to set the set temperature.
NOTE: The settable temperature range varies with the model of
outdoor units and remote controller.
INDOOR UNIT CONTROL
8-1. COOL OPERATION
MENU ON
OFF
RETURN SELECT
HOLD
.