Mitsubishi Electric PKFY-P15VBM-ER2 Operating manual

TECHNICAL & SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES.........................2
2. SAFETY PRECAUTION..........................3
3. PART NAMES AND FUNCTIONS..........5
4. SPECIFICATION...................................13
5. OUTLINES AND DIMENSIONS............15
6. WIRING DIAGRAM...............................16
7. REFRIGERANT SYSTEM DIAGRAM........19
8. TROUBLESHOOTING..........................19
9. DISASSEMBLY PROCEDURE.............28
Indoor unit
[Model names] [Service Ref.]
No. OCH418
REVISED EDITION-C
INDOOR UNIT
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R410A
Note:
•This manual describes only
service data of the indoor
units.
• RoHS compliant products
have <G> mark on the
spec name plate.
December 2012
Model name
indication PARTS CATALOG (OCB418)
PKFY-P15VBM-E
PKFY-P15VBM-ER2
PKFY-P15VBM-ER3
PKFY-P20VBM-E
PKFY-P20VBM-ER1
PKFY-P20VBM-ER2
PKFY-P20VBM-ER3
PKFY-P25VBM-E
PKFY-P25VBM-ER1
PKFY-P25VBM-ER2
PKFY-P25VBM-ER3
Revision:
•PKFY-P15/20/25VBM-ER3
have been added in
REVISED EDITION-C.
•Some descriptions have
been modified.
•Please void OCH418
REVISED EDITION-B.
PKFY-P15VBM-E
PKFY-P20VBM-E
PKFY-P25VBM-E

2
1TECHNICAL CHANGES
PKFY-P15VBM-ER2 PKFY-P15VBM-ER3
PKFY-P20VBM-ER2 PKFY-P20VBM-ER3
PKFY-P25VBM-ER2 PKFY-P25VBM-ER3
INDOOR CONTROLLER BOARD (I.B.) has been changed. (S/W version up)
PKFY-P15VBM-E PKFY-P15VBM-ER2
PKFY-P20VBM-ER1 PKFY-P20VBM-ER2
PKFY-P25VBM-ER1 PKFY-P25VBM-ER2
HEAT EXCHANGER and WATER CUT have been changed.
PKFY-P20VBM-E PKFY-P20VBM-ER1
PKFY-P25VBM-E PKFY-P25VBM-ER1
INDOOR CONTROLLER BOARD (I.B.) has been changed.
OCH418C

3
2SAFETY 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.
OCH418C

4
[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
· Check that cylinder for R410A on the market is syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
1Gauge manifold · Only for R410A
· Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 5.3 MPa·G or over.
2Charge hose · Only for R410A
· Use pressure performance of 5.09 MPa·G or over.
3Electronic scale —
4Gas leak detector · Use the detector for R134a, R407C or R410A.
5Adaptor for reverse flow check · Attach on vacuum pump.
6Refrigerant charge base —
7Refrigerant cylinder · Only for R410A Top of cylinder (Pink)
Cylinder with syphon
8Refrigerant recovery equipment —
OCH418C

55
3PART NAMES AND FUNCTIONS
3-1. Indoor unit
Filter
Grille
Louver
Air outlet
Air intake
Vane
OCH418C

6
Function buttons
F1 F2 F3 F4
Press to turn ON/OFF the indoor unit.
ON / OFF button
When the backlight is off, pressing any button turns
the backlight on and does not perform its function.
(except for the (ON / OFF) button)
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.
Press to save the setting.
SELECT button
Press to return to the previous screen.
RETURN button
Press to bring up the Main menu.
MENU button
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.
Backlit LCD
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.
ON / OFF lamp
Main display : Press to change the operation mode.
Main menu : Press to move the cursor down.
Function button F1
Main display : Press to decrease temperature.
Main menu : Press to move the cursor up.
Function button F2
Main display : Press to increase temperature.
Main menu : Press to go to the previous page.
Function button F3
Main display : Press to change the fan speed.
Main menu : Press to go to the next page.
Function button F4
Fri
Room
Set temp.
Mode Temp. Fan
Cool Auto
Main
Main display:
Cursor Page
Main menu
Vane·Louver·Vent. (Lossnay)
High power
Timer
Weekly timer
OU silent mode
<Main display> <Main menu>
Function guide
3-2. WIRED REMOTE CONTROLLER <PAR-30MAA/PAR-31MAA>
* The functions which can be used are restricted according to the model. : Supported : Unsupported
Function PAR-30MAA/PAR-31MAA PAR-21MAA
Slim City multi
Body Product size H × W × D (mm) 120 × 120 × 19 120 × 130 × 19
LCD Full Dot LCD Partial 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
Wired remote controller function
OCH418C

7
Fri
Mode Temp. Fan
Room
Cool Auto
Set temp.
Fri
Cool
Mode Temp. Fan
AutoSet temp.
The main display can be displayed in two different modes: "Full" and "Basic".
T
he factory setting is "Full". To switch to the "Basic" mode, change the setting on the Main display setting.
<Full mode> <Basic mode>
* All icons are displayed for explanation.
Most settings (except ON / OFF, mode, fan speed, temperature) can be made from the Menu screen.
Indoor unit operation mode appears here.
Operation mode
Preset temperature appears here.
Preset temperature
Current time appears here.
Clock (See the Installation Manual.)
Fan speed
Fan speed setting appears here.
Functions of the corresponding buttons appear here.
Button function guide
Appears when the ON/OFF operation is centrally controlled.
Appears when the operation mode is centrally controlled.
Appears when the preset temperature is centrally controlled.
Appears when the filter reset function is centrally controlled.
Indicates when filter needs maintenance.
Current room temperature appears here.
Room temperature
(See the Installation Manual.)
Appears when the buttons are locked.
Appears when the On/Off timer or Night setback function is
enabled.
Appears when the Weekly timer is enabled.
Appears while the units are operated in the energy-save
mode.
Appears when the built-in thermistor on the remote control-
ler is activated to monitor the room temperature.
appears when the thermistor on the indoor unit is acti-
vated to monitor the room temperature.
Indicates the vane setting.
Indicates the louver setting.
Indicates the ventilation setting.
Appears when the preset temperature range is restricted.
OCH418C

8
Not all functions are available on all models of indoor units.
Filter information
Error information
Energy saving
Auto return
Schedule
Night setback
Main menu Press the MENU button.
Move the cursor to the desired item with the F1 and F2 buttons, and press the SELECT button.
Vane · Louver · Vent. (Lossnay)
High power
Weekly timer
Restriction
Maintenance
Initial setting
On / Off timer
Auto-Off timer
Temp. range
Operation lock
Manual vane angle
Main / Sub
Timer
Main display
Contrast
Display details
Auto mode
Administrator password
Language selection
Service
Service menu
Input maintenance info.
Function setting
Lossnay (City Multi only)
Check
Self check
Maintenance password
Remote controller check
Test run
Clock
Drain pump test run
Auto descending panel
Menu structure
OCH418C

9
Setting and display items Setting details
Vane · Louver · Vent.
(Lossnay) Use to set the vane angle. • Select a desired vane setting from five 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.
Timer On/Off timer Use to set the operation On/Off times.
• Time can be set in 5-minute increments.
* Clock setting is required.
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.
Filter information Use to check the filter status.
• The filter sign can be reset.
Error information Use to check error information when an error occurs.
• Error 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.
Weekly timer Use to set the weekly operation On / Off times.
• Up to eight operation patterns can be set for each day.
* Clock setting is required.
* Not valid when the On/Off timer is enabled.
Energy
saving Auto return Use to get the units to operate at the preset temperature after performing energy-save operation for a specified 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 Set the start/stop times to operate the units in the energy-save mode for each day of the
week, and set the energy-saving rate.
• Up to four energy-save 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.
* Clock setting is required.
Night setback Use 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.
* Clock setting is required.
Restriction Temp. range Use 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.
Maintenance Auto
descending
panel
Auto descending panel (Optional parts) Up / Down you can do.
Manual
vane angle Use to set the vane angle for each vane to a fixed position.
Initial setting Main/Sub When connecting two remote controllers, one of them needs to be designated as a sub
controller.
Clock Use to set the current time.
Main display Use to switch between "Full" and "Basic" modes for the Main display.
• The default setting is "Full."
Contrast Use to adjust screen contrast.
Main menu list
OCH418C

10
Setting and display items Setting details
Initial setting Display
details Make the settings for the remote controller related items as necessary. Clock: The factory 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.
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.
Administrator
password
The administrator password is required to make the settings for the following items.
• Timer setting • Energy-save setting • Weekly timer setting
• Restriction setting • Outdoor unit silent mode setting • Night set back
Language
selection Use to select the desired language.
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
Function
setting Make the settings for the indoor unit functions via the remote controller as necessary.
LOSSNAY
setting
(City Multi only)
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.
Refrigerant leak check: Refrigerant leaks can be judged.
Smooth maintenance: The indoor and outdoor maintenance data can be displayed.
Request cord: Details of the operation data including each thermistor temperature and error
history can be checked.
Self check Error history of each unit can be checked via the remote controller.
Maintenance
password Take the following steps to change the maintenance password.
Remote
controller
check
When the remote controller does not work properly, use the remote controller checking
function to troublushoot the problem.
OCH418C

11
°F°C
°F°C
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
●
●
Display Section
For purposes of this explanation,
all parts of the display are shown.
During actual operation, only
the relevant items will be lit.
Identifies the current operation
Shows the operating mode, etc.
*Multilanguage display is available.
“Centrally Controlled” indicator
Indicates that operation from the
remote controller has been prohib-
ited by a master controller.
“Timer is Off” indicator
Indicates that the timer is off.
Temperature Setting
Shows the target temperature.
Day-of-Week
Shows the current day of the week.
Time/Timer Display
Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, the time to be
switched off is shown.
“Sensor” indication
Displays when the remote controller
sensor is used.
“Locked” indicator
Indicates that remote controller but-
tons have been locked.
“Clean The Filter” indicator
To be displayed on when it is time to
clean the filter.
Timer indicators
The indicator comes on if the corre-
sponding timer is set.
Up/Down Air Direction indica-
tor
The indicator shows the direc-
tion of the outcoming airflow.
“One Hour Only” indicator
Room Temperature display
Shows the room temperature. The room
temperature display range is 8 - 39.
The display blinks if the temperature
is less than 8or 39or more.
Louver display
Indicates the action of the swing louver.
Does not appear if the louver is not
running.
(Power On indicator)
Indicates that the power is on.
Fan Speed indicator
Shows the selected fan speed.
Ventilation indicator
Appears when the unit is running in
Ventilation mode.
Operation Section
Temperature setting buttons
Down
Up
Timer Menu button
(Monitor/Set button)
Mode button (Return button)
Set Time buttons
Back
Ahead
Timer On/Off button
(Set Day button)
Opening the
cover
ON/OFF button
Fan Speed button
Filter button
(<Enter> button)
Test Run button
Check button (Clear button)
Airflow Up/Down button
Louver button
( Operation button)
To return operation
number
Ventilation button
( Operation button)
To go to next operation
number
Note:
“PLEASE WAIT” message
This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure.
“NOTAVAILABLE” message
This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have).
If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as
far as any of the indoor units is equipped with the function.
Built-in temperature sensor
Displays if the airflow is set to
Low or downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off in one hour,
at which time the airflow direction
also changes.
3-3. WIRED REMOTE CONTROLLER <PAR-21MAA>
OCH418C

12
3-4. Wireless remote controller
ON/OFF TEMP
FAN
VANE
TEST RUN
AUTO STOP
AUTO START
h
min
LOUVER
MODE
CHECK
RESETSET CLOCK
MODEL SELECT
NOTAVAILABLE
CHECK TEST RUN
°C
AMPM
AMPM
VANE CONTROL button
Used to change the air flow direction.
CLOCK button
RESET button
SET button
ON/OFF button
The unit is turned ON and OFF alternately
each time the button is pressed.
LOUVER button
Changes left/right airflow direction.
(Not available for this model.)
MODE SELECT button
Used to switch the operation mode between
cooling, drying, fan, heating and auto mode.
CHECK-TEST RUN buttons
Only press this button to perform an
inspection check or test operation.
Do not use it for normal operation.
FAN SPEED SELECT button
Used to change the fan speed.
TIMER display
Displays when in timer operation or when
setting timer.
buttons
SET TEMPERATURE button sets any desired
room temperature.
CLOCK display
Displays the current time.
“ ” “ ” display
Displays the order of timer operation.
“ ” “ ” display
Displays whether timer is on or off.
* If the outdoor unit is cool only type, the
heating and auto mode are not available.
Buttons used to set the “hour and minute” of
the current time and timer settings.
h and min buttons
display
display
FAN SPEED display indicates which fan
speed has been selected.
display
The vertical direction of air flow is indicated.
display
Blinks when model is selected.
display
display
CHECK and TEST RUN display indicate that
the unit is being checked or test-run.
display
OPERATION MODE display
Operation mode display indicates which
operation mode is in effect.
TIMER CONTROL buttons
AUTO STOP (OFF timer): when this switch is
set, the air conditioner will be automatically
stopped at the preset time.
AUTO START (ON timer): when this switch is
set, the air conditioner will be automatically
started at the preset time.
MODEL SELECT
CHECK TEST RUN
SET TEMP. display indicates the set desired
temperature.
Lights up while the signal is transmitted to
the indoor unit when the button is pressed.
OCH418C

1313
*1 Nominal cooling conditions
Note : 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 conditions
27°CDB/19.5°CWB (81°FDB/67°FWB)
35°CDB (95°FDB)
5m (16-3/8 ft)
0m (0 ft)
*3 Nominal heating conditions Unit converter
20°CDB (68°FDB)
7°CDB/6°CWB (45°FDB/43°FWB)
7.5 m (24-9/16 ft)
0 m (0 ft)
* Due to continuing improvement, above specification may be subject to change without notice.
* Nominal conditions *1, *3 are subject to JIS B8615-1.
kcal/h = kW × 860
Btu/h = kW × 3,412
cfm = m3/min × 35.31
lb = kg/0.4536
*Above specification data is
subject to rounding variation.
Service ref.
Power source
Cooling capacity
(Nominal)
Heating capacity
(Nominal )
External finish
External dimension H x W x D
Net weight
Heat exchanger
Fan
Noise level (Low-Mid2-Mid1-High)
(measured in anechoic room)
Insulation material
Air filter
Protection device
Refrigerant control device
Connectable outdoor unit
Diameter of
refrigerant pipe
Field drain pipe size
Standard
attachment
Remark
Power input
Current input
Power input
Current input
Type x Quantity
External
static press.
Motor type
Motor output
Driving mechanism
Airflow rate
(Low-Mid2-Mid1-High)
Liquid
Gas
Document
Accessory
Optional parts
External LEV Box
Installation
kW
kcal/h
Btu/h
kcal/h
kW
A
kW
kcal/h
Btu/h
kW
A
mm
in.
kg (lb)
Pa
mmH2O
kW
m3/min
L/s
cfm
dB <A>
mm (in.)
mm (in.)
mm (in.)
*1
*1
*1
*2
*3
*3
*3
(R410A)
(R410A)
Installation Manual, Instruction Book
1-phase 220-240V 50Hz, 1-phase 220V 60Hz
Cross fin (Aluminum fin and copper tube)
1-phase induction motor
Direct-driven by motor
Polyethylene sheet
PP honeycomb
Fuse
LEV
R410A CITY MULTI
PKFY-P20VBM-E
PKFY-P20VBM-ER1
PKFY-P20VBM-ER2
PKFY-P20VBM-ER3
Plastic, MUNSELL (1.0Y 9.2/0.2)
2.2
1,900
7,500
2,000
0.04
0.20
2.5
2,200
8,500
0.04
0.20
295 × 815 × 225
11-5/8" × 32-1/8" × 8-7/8"
10 (23)
Line flow fan × 1
0
0
0.017
4.9 - 5.2 - 5.6 - 5.9
82 - 87 - 93 - 98
173 - 184 - 198 - 208
29 - 31 - 34 - 36
PKFY-P25VBM-E
PKFY-P25VBM-ER1
PKFY-P25VBM-ER2
PKFY-P25VBM-ER3
2.8
2,400
9,600
2,500
0.04
0.20
3.2
2,800
10,900
0.04
0.20
295 × 815 × 225
11-5/8" × 32-1/8" × 8-7/8"
10 (23)
Line flow fan × 1
0
0
0.017
4.9 - 5.2 - 5.6 - 5.9
82 - 87 - 93 - 98
173 - 184 - 198 - 208
29 - 31 - 34 - 36
I.D. 16mm (5/8")
PAC-SG95LE-E
I.D. 16mm (5/8")
PAC-SG95LE-E
ø6.35 (ø1/4")
ø12.7 (ø1/2") Flare Flare ø6.35 (ø1/4") ø12.7 (ø1/2") Flare Flare
PKFY-P15VBM-E
PKFY-P15VBM-ER2
PKFY-P15VBM-ER3
1.7
1,450
5,800
1,500
0.04
0.20
1.9
1,600
6,500
0.04
0.20
295 × 815 × 225
11-5/8" × 32-1/8" × 8-7/8"
10 (23)
Line flow fan × 1
0
0
0.017
4.9 - 5.0 - 5.2 - 5.3
82 - 83 - 87 - 88
173 - 177 - 184 - 187
29 - 31 - 32 - 33
I.D. 16mm (5/8")
PAC-SG95LE-E
ø6.35 (ø1/4")
ø12.7 (ø1/2") Flare Flare
Details on foundation work, duct work, insulation work, electrical wiring, power source switch, and other items shall be referred to
the Installation Manual.
4SPECIFICATION
4-1. SPECIFICATIONS
OCH418C

14
4-2. ELECTRICAL PARTS SPECIFICATIONS
Parts name
Service ref.
Symbol
TH21
TH22
TH23
FUSE
MF
C1
MV
LEV
TB2
TB5
Resistance 0/15k, 10/9.6k, 20/6.3k, 25/5.4k, 30/4.3k, 40/3.0k
Resistance 0/15k, 10/9.6k, 20/6.3k, 25/5.4k, 30/4.3k, 40/3.0k
Resistance 0/15k, 10/9.6k, 20/6.3k, 25/5.4k, 30/4.3k, 40/3.0k
250V 6.3A
4-Pole Output 17W / PS4V17-KB
1.5× 440V
MSFBC20 DC12V
(L, N, ) 250V 20A
(M1, M2) 250V 10A
Liquid pipe thermistor
Gas pipe thermistor
Fan motor capacitor
Linear expansion valve
PKFY-P20VBM-E
PKFY-P20VBM-ER1
PKFY-P20VBM-ER2
PKFY-P20VBM-ER3
PKFY-P25VBM-E
PKFY-P25VBM-ER1
PKFY-P25VBM-ER2
PKFY-P25VBM-ER3
Room temperature
thermistor
Fuse
(Indoor controller board)
Fan motor
(with thermal fuse)
Vane motor
(with limit switch)
Power supply terminal
block
Transmission terminal
block
DC12V Stepping motor drive
Port :3.2 (0~2000pulse)
PKFY-P15VBM-E
PKFY-P15VBM-ER2
PKFY-P15VBM-ER3
OCH418C

1515
M1 M2
N
L
60mm or more for left and left back piping.
Terminal block
Air intake (Direction)
Terminal block Detailed
Address board
The first side
The second side
Transmission (DC 24-30V)
MA-remote controller cable (DC8.7-13V)
There is not MA-remote controller terminal block. Connection with MA-remote controller refers to Note.3
Note.1 Use M10 or W3/8 screw for installation plate. Note.2 Extension piping side. Note.3 In case of connecting MA-remote controller, please connect
MA-remote controller cable (accessory) to the connector.
Power supply (220-240V)
Transmission
Power supply
Address board Detailed Address setting digit
Mode selection
Connection No.
Address board
Knockout hole of right piping
Knockout hole of
remote controller wiring
(Direction)
Knock of hole
Knockout hole for remocon wiring
4-4.5%35 hole
Installation plate
R
15
Knockout hole for under piping
R
8
10
50
16 2.5
45 91.5
Installation plate balance point hole
4-4.5%40 hole
4-4.5%37 hole
12- 2.8 hole:
4-:9 hole
8-:4.3 hole 87- 5.1 hole:Piping hole :65
Detail of installation plate
R
8
R
12
54
R
15
Detailed figure dwg(A B C) (Knockout hole)
Knockout hole for left piping
R
8
45
R
15
24.4
3
5
4510
10
34
162.5
504
Air intake
Air outlet
Air outlet (Direction)
Installation plate
Installation space
:16mm(I.D)
1/2F(:12.7mm)
1/4F(:6.35mm)
Drain pipe
Liquid pipe
Gas pipe
Refrigerant piping
Min 22mm Min 20mm
Min 100mm
Max 90mm
Min 50mm
Receiver
Operation lamp
DEFROST/STAND BY lamp
Emergency operation switch <Heating>
Emergency operation switch <Cooling>
37.8
7
640
Air intake
Air intake
815
115
106.7
3
295
60
640
Air intake
695
Air outlet
225 5
110
116
450
Gas pipe
520
Liquid pipe
100.614
783
74.6
0
97.5
180
0
159
0
27.5
125
53
45
298
235
205
175
0
170
65
40
128
124
90
159 168
113
87
135
110
35 10
0
328
102.5
15
122.5
133
72.5
85
47.5
60
22.5
407.5
328
295
260
225
190
155
120
85
30
407.5
298
260
225
190
155
120
85
30
10
10
5044
175
235
170
205
Air outlet
*3 Address board is protected
by a plastic cover.
Remove the screw holding
the cover with screw-driver
at the time of address setting.
Drain hose (Effective length: 640)
OUTLINES AND DIMENSIONS
5
PKFY-P15VBM-E PKFY-P20VBM-E PKFY-P25VBM-E
PKFY-P20VBM-ER1 PKFY-P25VBM-ER1
PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2
PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3
Unit: mm
OCH418C

16
Mark Meaning
LED1 Main power supply Main power supply (indoor unit:220-240V)
power on lamp is lit
Function
LED on indoor board for service
ON
OFF 1234
MODELS SW2
P20
ON
OFF 1234
MODELS SW2
P25
LED2 Power supply for
MA-Remote controller Power supply for MA-Remote controller on lamp is lit
Legend
Symbol
I.BCN32
CN51
CN52
SW2
SW2
SW3 TH21
TH22
Remote switch
Centrally control
Remote indication
Capacity code
Mode selection Room temp.detection
(0/15k,25/5.4k)
Pipe temp.detection/liquid
(0/15k,25/5.4k)
Name
Indoor controller board
P.B
W.B
Indoor power board
ZNR Varistor
FUSE
Fuse (6.3A 250V)
F.C Fan phase control
MF Fan motor
C1 Capacitor (fan motor)
MV Vane motor
LEV Linear expansion valve
Connector
Switch
Switch
Thermistor
Symbol
TB2
TB5 Power supply
Transmission
Address board
Mode selection
Name Symbol Name
Terminal
block
TH23
Pipe temp.detection/Gas
(0/15k,25/5.4k)
Note
1. At servicing for outdoor unit, always follow the wiring diagram of outdoor unit.
2. In case of connecting MA-remote controller, please connect MA-remote controller cable in an accessory
to the connector . (Remote controller wire is non-polar.)
3. In case of using M-NET, please connect to TB5 (Transmission line is non-polar.)
4. Symbols used in wiring diagram above are, : terminal block, : connector
5. The setting of the SW2 dip switches differs in the capacity. For the detail, refer to the fig :*1.
6. Please set the switch SW5 according to the power supply voltage.
Set SW5 to 240V side when the power supply is 230 and 240 volts.
When the power supply is 220 volts, set SW5 to 220V side.
12
A.B SW1
SW1
SW5
RU
BZ
LED1 LED (Operation indicator: Green)
LED (Preparation for heating: Orange)
Emergency operation (Heat)
Emergency operation (Cool)
LED2
SW11
SW12
SW14
Voltage selection
Address setting 1s digit
Address setting 10ths digit
Connection No.
Switch
Receving unit
Buzzer
Wireless remote controller board
MV
M
RED
WHT(PNK)
BLU
ORN
YLW
CN5V
VANE
(BLU)
CN52CN51
CN41
CN32
6
5
9
CN60
LEV
(WHT)
BRN
RED
BLU
ORN
YLW
WHT
9
CN3A
MA-
REMOCON
(BLU)
MF
FAN
(GRN) CND
(RED)
CN2M
M-NET
(BLU)
TO OUTDOOR UNIT
BC CONTROLLER
M-NET REMOTE CONTROLLER
DC24-30V
BREAKER
(16A)
FUSE
(16A)
PULL
BOX
TB2
TO NEXT
INDOOR UNIT
POWER SUPPLY
~/N 220-240V 50Hz
~/N 220V 60Hz
RED RED WHT BLK BLU
GRN /YLW
BLU BLU
1
TB5
2
TO MA-REMOTE
CONTROLLER
DC8.7-13V
ORN ORN
ZNR FUSE
250V
6.3A
C1
LED1
CN35P
(BLU)
F.C
CN53P
(RED)
CN53M
(RED)
CN35M
(BLU)
LED2
CN29
GAS
(BLK)
CN21
LIQUID
(WHT)
TH23 TH22
CN20
INTAKE
(RED)
TH21
CN81
ADDRESS
(RED)
(RED)
ADDRESS
CN82
CN42
ADDRESS
(RED)
(RED)
ADDRESS
CN43
SW2SW3
123456789 10
1234
ON
OFF
I.B
See fig :*1
SW5
SW1
220V 240V
A.B
W.B
ON
OFF
0
SW12
10ths
DIGIT
0
SW11 0
SW14
1s
DIGIT BRANDH
No.
P.B
4
8
12345678910
4
1
11 112
12 13
2
13
13
146
13 14
56 CN90
WIRELESS
(WHT)
91
141 8
1
1
5
5
8
1
1
5
6
1
LED2
CNB
RU
SW2SW1
LED1
BZ
t° t° t°
M
M
1~
LEV M1M2
U
L
N
13 12
1515
The black square ( ■ ) indicates a switch position. <* 1>
WIRING DIAGRAM6
PKFY-P20VBM-E PKFY-P25VBM-E
OCH418C

1717
Mark Meaning
LED1 Main power supply Main power supply (indoor unit:220-240V)
power on lamp is lit
Function
LED on indoor board for service
ON
OFF 1234
MODELS SW2
P20 ON
OFF 1234
MODELS SW2
P25
<*1>
LED2 Power supply for
MA-Remote controller Power supply for MA-Remote controller on lamp is lit
Legend
Symbol
I.BCN32
CN51
CN52
SW2
SW2
SW3 TH21
TH22
Remote switch
Centrally control
Remote indication
Capacity code
Mode selection Room temp.detection
(0/15k,25/5.4k)
Pipe temp.detection/Liquid
(0/15k,25/5.4k)
Name
Indoor controller board
P.B
W.B
Indoor power board
ZNR Varistor
FUSE
Fuse (T6.3AL 250V)
F.C Fan phase control
MF Fan motor
C1 Capacitor (Fan motor)
MV Vane motor
LEV Linear expansion valve
Connector
Switch
Switch
Thermistor
Symbol
TB2
TB5 Power supply
Transmission
Address board
Mode selection
Name Symbol Name
Terminal
block
TH23
Pipe temp.detection/Gas
(0/15k,25/5.4k)
Note
1. At servicing for outdoor unit, always follow the wiring diagram of outdoor unit.
2. In case of using MA-remote controller, please connect MA-remote controller cable in an accessory
to the connector . (Remote controller wire is non-polar.)
3. In case of using M-NET, please connect to TB5 (Transmission line is non-polar.)
4. Symbols used in wiring diagram above are, : terminal block, : connector
5. The setting of the SW2 dip switches differs in the capacity. For the detail, refer to the fig :*1.
6. Please set the switch SW5 according to the power supply voltage.
Set SW5 to 240V side when the power supply is 230 and 240 volts.
When the power supply is 220 volts, set SW5 to 220V side.
12
A.B SW1
SW1
SW5
RU
BZ
LED1 LED (Operation indicator: Green)
LED (Preparation for heating: Orange)
Emergency operation (Heat)
Emergency operation (Cool)
LED2
SW11
SW12
SW14
Voltage selection
Address setting 1s digit
Address setting 10ths digit
Connection No.
Switch
Receving unit
Buzzer
Wireless remote controller board
M
CN5V
VANE
(BLU)
CN52CN51
CN41
CN32
6
5
9
CN60
LEV
(WHT)
BRN RED
BLU
ORN
YLW WHT
9
CN3A
MA-
REMOCON
(BLU)
MF
FAN
(GRN) CND
(RED)
CN2M
M-NET
(BLU)
TO OUTDOOR UNIT
BC CONTROLLER
M-NET REMOTE CONTROLLER
DC24-30V
BREAKER
(16A)
FUSE
(16A)
PULL
BOX
TB2
TO NEXT
INDOOR UNIT
POWER SUPPLY
~/N 220-240V 50Hz
~/N 220V 60Hz
RED RED WHT BLK BLU
GRN /YLW
BLU BLU
1TB5 2
TO MA-REMOTE
CONTROLLER
DC8.7-13V
ORN ORN
ZNR FUSE
250V
6.3A
C1
LED1
CN35P
(BLU)
F.C
CN53P
(RED)
CN53M
(RED)
CN35M
(BLU)
LED2
CN29
GAS
(BLK)
CN21
LIQUID
(WHT)
TH23 TH22
CN20
INTAKE
(RED)
TH21
CN81
ADDRESS
(RED)
(RED)
ADDRESS
CN82
CN42
ADDRESS
(RED)
(RED)
ADDRESS
CN43
SW2SW3
123456789 10
1234
ON
OFF
I.B
See fig :*1
SW5
SW1
220V 240V
A.B
W.B
ON
OFF
0
SW12
10ths
DIGIT
0
SW11 0
SW14
1s
DIGIT BRANCH
No.
P.B
4
8
12345678910
4
1
11 112
12 13
2
13
13
146
13 14
56 CN90
WIRELESS
(WHT)
91
141 8
1
1
5
5
8
1
LED2
CNB
RU
SW2SW1
LED1 BZ t° t° t° M
1~
LEV
M1M2
U
L
N
13 12
1515
ON
OFF 1234
MODELS SW2
P15
MV
RED
WHT
BLU
ORN
YLW
1
5
M
The black square ( ■ ) indicates a switch position.
PKFY-P15VBM-E
PKFY-P20VBM-ER1 PKFY-P25VBM-ER1
PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2
OCH418C

18
PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3
Note
1. At servicing for outdoor unit, always follow the wiring diagram of outdoor unit.
2. In case of using MA-remote controller,please connect MA remote controller cable in an accessory
to the connector . (Remote controller wire is non-polar.)
3. In case of using M-NET,please connect to TB5 (Transmission line is non-polar.)
4. Symbols used in wiring diagram above are, : terminal block, : connector
5. The setting of the SW2 dip switches differs in the capacity. For the detail, refer to the fig : *1.
6. Please set the switch SW5 according to the power supply voltage.
Set SW5 to 240V side when the power supply is 230 and 240 volts.
When the power supply is 220 volts, set SW5 to 220V side.
Legend
Symbol
I.BCN32
CN51
CN52
CN105
SW2
SW2
SW3
TH21
TH22
Remote switch
Centrally control
Remote indication
IT Terminal
Capacity code
Mode selection
Room temp,detection
(0°C/15kΩ,25°C/5.4kΩ)
Pipe temp,detection/Liquid
(0°C/15kΩ,25°C/5.4kΩ)
Name
Indoor controller board
P.B
W.B
Indoor power board
FUSE
Fuse (T6.3AL 250V)
F.C Fan phase control
MF Fan motor
C1 Capacitor (Fan motor)
MV Vane motor
LEV Linear expansion valve
Connector
Switch
Switch
Thermistor
Symbol
TB2
TB5 Power supply
Transmission
Address board
Mode selection
Name Symbol Name
Terminal
block
TH23
Pipe temp,detection/Gas
(0°C/15kΩ,25°C/5.4kΩ)
Models
P15 1234
ON
OFF
SW2 Models
P20 1234
ON
OFF
SW2 Models
P25
SW2
1234
ON
OFF
12
A.B SW1
SW1
SW5
RU
BZ
LED1 LED (Operation indicator:Green)
LED (Preparation for heating:Orange)
Emergency operation (Heat)
Emergency operation (Cool)
LED2
SW11
SW12
SW14
Voltage selection
Address setting 1s digit
Address setting 10ths digit
Branch No.
Switch
Receving unit
Buzzer
Wireless remote controller board
Mark
LED1
LED2
Meaning
Main power supply
Power supply for
MA-Remote controller
Function
Power supply for MA-Remote controller
on →lamp is lit
Main power supply(Indoor unit : 220-240V)
power on →lamp is lit
LED on indoor board for service The black square (
■ ) indicates a switch position. <* 1>
MV
MRED
WHT
BLU
ORN
YLW
CN5V
VANE
(BLU)
CN52
(GRN)
CN51
(WHT)
CN41
(WHT)
CN32
(WHT)
65
9
CN60
LEV
(WHT)
BRN RED BLU ORN YLW WHT
9
CN3A
MA-
REMOCON
(BLU)
MF
FAN
(GRN) CND
(RED)
CN2M
M-NET
(BLU)
TO OUTDOOR UNIT
BC CONTROLLER
M-NET REMOTE CONTROLLER
DC24 - 30V
BREAKER
(16A)
FUSE
(16A)
PULL
BOX
TB2
TO NEXT
INDOOR UNIT
POWER SUPPLY
~/N 220 - 240V 50Hz
~/N 220V 60Hz
RED RED WHT BLK BLU
GRN /YLW
BLU BLU
1TB5 2
TO MA-REMOTE
CONTROLLER
DC8.7 - 13V
ORN
ORN
FUSE
250V
6.3A
C1
LED1 TAB1
CN35P
(BLU)
F.C
CN53P
(RED)
CN53M
(RED)
CN35M
(BLU)
LED2
CN29
GAS
(BLK)
CN21
LIQUID
(WHT)
TH23 TH22
CN20
INTAKE
(RED)
TH21
CN81
ADDRESS
(RED)
(RED)
ADDRESS
CN82
CN42
ADDRESS
(RED)
(RED)
ADDRESS
CN43 SW2SW3
J41
Pair No.
J42
123456789 10
1234
ON
OFF
I.B
See fig :*1
SW5
SW1
220V 240V
A.B
W.B
ON
OFF
P.B
4
8
12345678910
4
1
11 112
12 13
2
13
13
146
13 14
56 CN90
WIRELESS
(WHT)
91
141 8
1
1
5
5
8
1
1
5
LED2
CNB
RU
SW1SW2
LED1 BZ
t° t° t°
M
M
1~
LEV
M1M2 L
N
CN105
(RED)
51
13 12
1515
SW14
BRANCH
No.
SW11
1s
DIGIT
SW12
10ths
DIGIT
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
OCH418C

1919
TROUBLESHOOTING
8
7REFRIGERANT SYSTEM DIAGRAM
8-1. HOW TO CHECK THE PARTS
PKFY-P15VBM-E PKFY-P20VBM-E PKFY-P25VBM-E
PKFY-P20VBM-ER1 PKFY-P25VBM-ER1
PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2
PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3
Strainer
(#100mesh)
Strainer
(#100mesh)
Strainer
(#100mesh)
Heat exchanger
Room temperature thermistor
TH21
Gas pipe temperature thermistor
TH23
Liquid pipe temperature thermistor
TH22
Gas pipe
Liquid pipe
Flare
Linear expansion
valve
Parts name Check points
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10~30)
Disconnect the connector then measure the resistance valve with a tester.
(Coil temperature 20)
Vane motor (MV)
Linear expansion
valve (LEV)
Refer to the next page for the details.
Room temperature
thermistor (TH21)
Liquid pipe temperature
thermistor (TH22)
Gas pipe temperature
thermistor (TH23)
Normal
4.3k~9.6k
Abnormal
Open or short
Normal
15010%
Abnormal
(1)-(5)
White-Red
(2)-(6)
Yellow-Brown
(3)-(5)
Orange-Red
(4)-(6)
Blue-Brown Open or short
Measure the resistance between the terminals with a tester. (At the ambient temperature 25)
Normal Normal
4007%
Abnormal
-
Red-Pink or White
-
Red-Blue
-
Red-Orange
-
Red-Yellow Open or short
Measure the resistance between the terminals with a tester. (At the ambient temperature 20)
Fan motor (MF)
Abnormal
Open or short
White-Black
Red-Black
Normal
286
200
Orange
Pink or
White
Red
Ye l l o w
Blue
4
2
1
5 3
Connect pin No.
M
White
Red
Black
1
4
6
FAN
1
2
3
4
5
6
LEV
White
Yellow
Orange
Blue
Red
Brown
CN60
Unit: mm(inch)
Service ref.
Item
PKFY-P15, 20, 25VBM-E
PKFY-P20, 25VBM-ER1
PKFY-P15, 20, 25VBM-ER2
Gas pipe {12.7 (1/2”)
Liquid pipe {6.35 (1/4”)
PKFY-P15VBM-E PKFY-P20VBM-E PKFY-P25VBM-E
PKFY-P20VBM-ER1 PKFY-P25VBM-ER1
PKFY-P15VBM-ER2 PKFY-P20VBM-ER2 PKFY-P25VBM-ER2
PKFY-P15VBM-ER3 PKFY-P20VBM-ER3 PKFY-P25VBM-ER3
OCH418C

20
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
< Thermistor for lower temperature >
Temperature ()
Resistance (K)
4:4
3
6
5
:3
2:2
1:1
:4
:3
:2
:1
Controller board
Drive circuit
Connector(CN60)
DC12V
Brown
Red
Blue
Orange
Yellow
White
M
4
6
2
3
5
1
Blue
Brown
Yellow
Orange
Red
White
Linear expansion valve
<Thermistor Characteristic graph>
Room temperature thermistor (TH21)
Liquid pipe temperature thermistor (TH22)
Gas pipe temperature thermistor (TH23)
Thermistor R0=15k' ± 3%
Fixed number of B=3480 ± 2%
Rt=15exp { 3480( ) }
0:15k'
10:9.6k'
20:6.3k'
25:5.4k'
30:4.3k'
40:3.0k'
Thermistor for
lower temperature
Linear expansion valve
1Operation summary of the linear expansion valve
• Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the indoor controller board.
• Valve position can be changed in proportion to the number of pulse signal.
<Connection between the indoor controller board and the linear expansion valve>
1
273+t 1
273
Note : Since the number of the connector at the controller board side and the relay connector are different, follow the color of
the lead wire.
OCH418C