Mitsubishi Electric PFFY Series Operating manual

TECHNICAL & SERVICE MANUAL
Indoor unit
[Model names] [Service Ref.]
PFFY-P20VKM-E2
PFFY-P25VKM-E2
PFFY-P32VKM-E2
PFFY-P40VKM-E2
No. OCH537
INDOOR UNIT
Floor Standing
Series PFFY
CONTENTS
1. SAFETY PRECAUTION .........................2
2. PART NAMES AND FUNCTIONS..........4
3. SPECIFICATION...................................12
4. NOISE CRITERIA CURVES.................14
5. AIR OUTLET SELECTION...................15
6. OUTLINES AND DIMENSIONS ...........16
7. WIRING DIAGRAM...............................17
8.
REFRIGERANT SYSTEM DIAGRAM...... 18
9. TROUBLE SHOOTING ........................19
10. DISASSEMBLY PROCEDURE ............27
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R410A
December 2012
Model name
indication
Note:
• This service manual
describes technical data of
the indoor units.
• As for outdoor units refer
to outdoor unit’s service
manual.
PFFY-P20VKM-E2
PFFY-P25VKM-E2
PFFY-P32VKM-E2
PFFY-P40VKM-E2
PARTS CATALOG (OCB537)

2
SAFETY PRECAUTION
1
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 enter into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigera-
nt will change and the efficiency will be lowered.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
If dirt, dust or moisture enter into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
If large amount of mineral oil enter, that can cause deterio-
ration of refrigerant oil etc.
Do not use the existing refrigerant piping.
The old refrigerant and lubricant in the existing piping
contains a large amount of chlorine which may cause the
lubricant deterioration of the new unit.
Use “low residual oil piping”
If there is a large amount of residual oil (hydraulic oil, etc.)
inside the piping and joints, deterioration of the lubricant
will result.
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.
Use the specified refrigerant only.
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.
OCH537

33
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
[1] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.
[2] Additional refrigerant charge
When charging directly from cylinder
· Check that cylinder for R410A on the market is syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
No. Tool name Specifications
1Gauge manifold · Only for R410A
· Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 5.3MPa·G or over.
2Charge hose · Only for R410A
· Use pressure performance of 5.09MPa·G or over.
3Electronic scale —
4Gas leak detector · Use the detector for R134a, R407C or R410A.
5Adaptor for reverse flow check · Attach on vacuum pump.
6Refrigerant charge base —
7Refrigerant cylinder · Only for R410A · Top of cylinder (Pink)
· Cylinder with syphon
8Refrigerant recovery equipment —
OCH537

4
PART NAMES AND FUNCTIONS
2
2-1. Indoor Unit
Louver
Louver
Air outlet
Vane
Filter
Vane
Air outlet Air inlet
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55
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
2-2. 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
OCH537

6
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.
OCH537

7
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
OCH537

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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
OCH537

9
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 OnlyAuto 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.
OCH537

10
°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
L
L
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
Displayed 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
Displayed if the airflow is set to
low or downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off in 1 hour,
when the airflow direction
also changes.
2-3. WIRED REMOTE CONTROLLER <PAR-21MAA>
OCH537

11
Caution
Only the Power on indicator lights when the unit is stopped and power supplied to the unit.
If you press a button for a feature that is not installed at the indoor unit, the remote controller will display the “Not Available”
message.
If you are using the remote controller to drive multiple indoor units, this message will appear only if he feature is not present
at every unit connected.
When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indication
(For max. 2 minutes). Please wait until this “PLEASE WAIT” indication disappear then start the operation.
For the PFFY-P·VKM series, the airflow direction displayed on the remote controller is different from the actual airflow direc-
tion. Refer to the following table.
Display
Actual
1234
(Horiz.) Swing
1234
(Horiz.) Swing
The airflow direction for the lower air outlet vane cannot be set. The airflow direction is automatically controlled by a compu-
ter.
OCH537

12
3SPECIFICATION
3-1. Specification
Item PFFY-P20VKM-E2
Power source 1-phase 220-240V 50Hz
Cooling capacity kW 2.2 2.8 3.6 4.5
Heating capacity kW 2.5 3.2 4.0 5.0
Power Cooling kW 0.025 0.025 0.025 0.028
consumption Heating kW 0.025 0.025 0.025 0.028
Current Cooling A 0.20 0.20 0.20 0.24
Heating A 0.20 0.20 0.20 0.24
Height mm 600 600 600 600
Dimension Width mm 700 700 700 700
Depth mm 200 200 200 200
Weight kg 15 15 15 15
Heat exchanger Cross fin (Aluminum plate fin and copper tube)
Type Line flow fan %2
Airflow rate *2 m
3
/min 5.9 - 6.8 - 7.6 - 8.7 6.1 - 7.0 - 8.0 - 9.1 6.1 - 7.0 - 8.0 - 9.1 8.0 - 9.0 - 9.5 - 10.7
Fan External static Pa 0
pressure
Motor Type DC motor
Output kW 0.03 %2
Air filter PP honeycomb fabric (Catechin air filter)
Refrigerant Gas (Flare) :mm :12.7
pipe dimension Liquid (Flare) :mm :6.35
Field drain pipe size :mm I.D.16 (PVC pipe VP-16 connectable)
Noise level *2 dB(A)27 - 31 - 34 - 37 28 - 32 - 35 - 38 28 - 32 - 35 - 38 35 - 38 - 42 - 44
PFFY-P25VKM-E2 PFFY-P32VKM-E2 PFFY-P40VKM-E2
Note 1. Rating conditions (JIS B 8616)
Cooling :Indoor : D.B. 27°C W.B. 19.0°C
outdoor :D.B. 35°C
Heating : Indoor : D.B. 20°C
outdoor :D.B. 7°C W.B. 6°C
*2. Air flow and the noise level are indicated as Low - Medium2 - Medium1 - High.
OCH537

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Parts name
Model Symbol
TH21
TH22
TH23
FUSE
MF1
MF2
MV1
MV2
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
(L, N, ) 330V 30A
(M1, M2, S) 250V 20A
Vane motor
Vane motor
Linear expansion valve
[coil]
PFFY-P20VKM-E2
Fuse
(Indoor controller board)
Fan motor (Upper)
Fan motor (Lower)
Power supply terminal
block
Transmission terminal
block
OUTPUT 30W
ARW40Z8P30MS
MP20Z
DC12V
MP35EA
DC12V
DC12V Stepping motor drive Port dimension
: 5.2 (0~2000 pulse)
EFM-40YGME
OUTPUT 30W
ARW40Y8P30MS
Thermistor
(Room temperature
detection)
Thermistor
(Pipe temperature
detection/Liquid)
Thermistor
(Pipe temperature
detection/Gas)
PFFY-P25VKM-E2 PFFY-P32VKM-E2 PFFY-P40VKM-E2
3-2. Electrical parts specifications
OCH537

14
4NOISE CRITERIA CURVES
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 27Wet-bulb temperature 19
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION
44
44
SPL(dB(A)) LINE
High
FAN SPEED
HEATING
Heating : Dry-bulb temperature 20Wet-bulb temperature 15
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 27Wet-bulb temperature 19
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION
37
37
SPL(dB(A)) LINE
High
FAN SPEED
HEATING
Heating : Dry-bulb temperature 20Wet-bulb temperature 1590
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : Dry-bulb temperature 27Wet-bulb temperature 19
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION
38
38
SPL(dB(A)) LINE
High
FAN SPEED
HEATING
Heating : Dry-bulb temperature 20Wet-bulb temperature 15
PFFY-P20VKM-E2
INDOOR UNIT
WALL
1m 1m
MICROPHONE
PFFY-P25VKM-E2
PFFY-P32VKM-E2
PFFY-P40VKM-E2
OCH537

15
AIR OUTLET SELECTION5
With this function, air comes out simultaneously from the upper and
lower air outlets so that the room can be cooled or heated effectively.
This function is set using the switch SWC on the address board.
12345678910
ON
OFF
SW1
SWC
CN82
CN43
SWC
Fig. 4-1
SWC How to set to blow out air from the upper and lower air outlets:
Set the SWC to lower side (" "). (Initial setting)
Air blows out automatically from the upper and lower air outlet as
shown in the table below.
How to set to blow out air from the upper air outlet only:
Set the SWC to upper side (" ").
Note:
Be sure to operate with the main power turned off.
Description of operation
Operation
Upper and lower air flow
Room temperature and
set temperature are dif-
ferent. *1
Upper air flow
Room temperature is
closetoset temperature
or thermo-off. *1
Upper air flow only
—
Upper and lower air flow
(Normal condition (in
heating))
Upper air flow
During defrosting op-
eration, start of opera-
tion, thermo-off
Upper and lower air flow
—
COOL DRY HEAT FAN
Air flow
Conditions
• Be sure to keep the area around the vane of the lower air outlet free of any objects.
SWC
SW14
SW11
SW12
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
(10ths DIGIT) (1s DIGIT)
./ .
(BRANCH No.)
*1
Upper and lower air flow
Upper air flow
(Room temp. – Set temp.)
*2
DIP SW3-2 (on indoor controller board) : OFF (Initial Setting)
If the air conditioner has operated for 2hours with upper and lower air flow,
it changes to 8deg for next 30minutes. After 30minutes it changes back to 4deg.
DIP SW3-2 (on indoor controller board) : ON
Remains to be 4deg.
2deg 4deg *2
OCH537

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6OUTLINES AND DIMENSIONS
Unit : mm
INDOOR UNIT
60
12
19 60
125
147
454155
60
35
45
110
80
60
72
337 337
363
333210 593 7
131131
4-:6 Hole
Indoor unit
Installation plate
96
123
125
6019
12
60
128
118
165
205
20012
12
11
Gas pipe
:12.7(flared)1/2
Liquid pipe
:6.35(flared)1/4
drain
Air in
Air out
Air out
46.5 46.5
600
700
54.5 508 137.5
607
More than 100mm
More than
100mm More than
100mm
PFFY-P20VKM-E2
PFFY-P25VKM-E2
PFFY-P32VKM-E2
PFFY-P40VKM-E2
OCH537

17
WIRING DIAGRAM7
MODELS
P20VBM
SW2
123456
ON
OFF
P25VBM 123456
ON
OFF
P32VBM 123456
ON
OFF
P40VBM 123456
ON
OFF
The black square ( ■ )
indicates a switch
position. <
*1 >
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 table below.
7. 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.
LS
CN36
( BLK )
SYMBOL
I. B CONNECTOR REMOTE SWITCH
CENTRALLY CONTROL
REMOTE INDICATION
IT TERMINAL
SWITCH CAPACITY CODE
MODE SELECTION
MODEL SELECTOR
FUSE (T6.3AL250V)
POWER SUPPLY (I.B)
POWER SUPPLY (I.B)
FAN MOTOR (UPPER)
FAN MOTOR (LOWER)
VANE MOTOR 1
VANE MOTOR 2
LIMIT SWITCH (CLOSE)
LINEAR EXPANSION VALVE
POWER SUPPLY
TRANSMISSION
ROOM TEMP, DETECTION
(0°C/15kΩ, 25°C/5.4kΩ)
PIPE TEMP, DETECTION/LIQUID
(0°C/15kΩ, 25°C/5.4kΩ)
[LEGEND]
NAME SYMBOL NAME
MF1
MF2
MV1
MV2
LS
LEV
TB2
TB5
TH21
TH22
INDOOR CONTROLLER BOARD SYMBOL
A. B SWITCH MODE SELECTION
ADDRESS SETTING 1s DIGIT
ADDRESS SETTING 10ths DIGIT
BRANCH NO.
OPTION SELECTOR
NAME
SW1
SW11
SW12
SW14
SWC
LED on indoor board for service
MEANING
MARK
Main power supply
Power supply for
MA-Remote controller
Main power supply (Indoor unit: 220-240V)
power on→Iamp is Iit
Power supply for MA-remote controller
on→Iamp is lit
FUNCTION
LED1
LED2
TERMINAL
BLOCK
THERMISTOR
ADDRESS BOARD
PIPE TEMP, DETECTION/GAS
(0°C/15kΩ, 25°C/5.4kΩ)
TH23
CN32
CN51
CN52
CN105
SW2
SW3
SW4
FUSE
LED1
LED2
CN2M
(BLU)
M-NET
CN3A
(BLU)
REMOCON
TB5
(SHIELD)
M1
M2
TB2
TB15
1
S
TH23 TH22
CN20
(RED)
INTAKE
CN105
(RED)
CN60
(WHT)
LEV CN52
(GRN)
REMOTE
INDICATION
CN6V1
(GRN)
VANE
TH21
CNMF2
(WHT)
CNMF1
(WHT)
CN31
(WHT)
DRAIN
CN44
(WHT)
LIQUID
/ GAS
ADDRESS
CN81 (RED)
CN42
(RED)
ADDRESS
CN32
(WHT)
REMOTE
SWITCH
CND
(BLK)
FUSE
CN51
(WHT)
CENTRALLY
CONTROL
4
8
6
5
LEV
M
DS
t° t° t°t°
2
L
N
12345678910
SW3
123456
SW2
12345
SW4
8
1
5
1
5
1
36
1
61
5
5
1
1
41 31
21
31
3
1
3
1
2
1
2
1
1
4
1
3
5
7
8
6
4
2
I.B
M
MS
3~
PULL BOX
FUSE
( 15A )
BREAKER
( 15A )
POWER SUPPLY
~ / N
220-240V 50Hz
220V 60Hz
TO NEXT
INDOOR
UNIT
BLU BRN ORN YLW RED WHT
SW14
SWC
BRANCH
No.
SW11
1s
DIGIT
SW12
10ths
DIGIT
12345678910
SW1
SW5
240V
220V
(RED)
ADDRESS
CN82
(RED)
ADDRESS
CN43
A.B
81
41
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
TO MA- REMOTE
CONTROLLER
DC8.7-13V
TO OUTDOOR UNIT
BC CONTROLLER
REMOTE CONTROLLER
DC24-30V
RED
BLU
GRN / YLW
MF1
5
MS
3~
MF2
MV1
ORN
*See fig : *1
ORN
BLU BLU
LED2
LED1
BLK
PNK
BLU
YLW
ORN
RED BRN
CN6V2
(BLU)
VANE
6
6
1
M
MV2
PNK
BLU
YLW
ORN
RED BRN
SWE OFF
ON
1 2
PFFY-P20VKM-E2 PFFY-P25VKM-E2 PFFY-P32VKM-E2 PFFY-P40VKM-E2
OCH537

18
8 REFRIGERANT SYSTEM DIAGRAM
Strainer (#50mesh)
Strainer (#100mesh)
Strainer1 (#50mesh)
Strainer2 (#50mesh)
Heat exchanger
Thermistor (Room temperature detection) TH21
Thermistor (Pipe temperature detection/Gas) TH23
Thermistor (Pipe temperature
detection/Liquid) TH22
Linear expansion valve
Gas pipe
Liquid pipe
Flare connection
Gas pipe
Liquid pipe
PFFY-P20,P25,P32,P40VKM-E2
:12.7(1/2'')
:6.35(1/4'')
Item Capacity Unit: mm
PFFY-P20VKM-E2
PFFY-P25VKM-E2
PFFY-P32VKM-E2
PFFY-P40VKM-E2
OCH537

19
9TROUBLE SHOOTING
9-1. HOW TO CHECK THE PARTS
Parts name Check points
Disconnect the connector then measure the resistance with a tester.
(Surrounding temperature 10- 30)
Disconnect the connector then measure the resistance valve with a tester.
(Surrounding temperature 20)
Linear expansion
valve (LEV)
(Refer to the next page for a detail.)
Room temperature
thermistor (TH21)
Liquid pipe temperature
thermistor (TH22)
Gas pipe temperature
thermistor (TH23)
Normal
4.3k~9.6k
Abnormal
Open or short
Abnormal
Open or short
Normal
200$10%
(1)-(5)
White-Red (2)-(6) Yellow-Brown (3)-(5) Orange-Red (4)-(6) Blue-Brown
Orange
Red
White
Blue
Brown
Yellow





M
Refer to 9-2.
Fan motor (MF1,2)
Measure the resistance between the terminals with a tester.
(Surrounding temperature 20- 30)
Vane motor (MV2)
NormalConnector Abnormal
186~214Open or short
Brown — Yellow
Brown — Blue
Red — Orange
Red — Pink
(Refer to the next
page for a detail.)
BlueYellow Brown
Orange
Red
Pink 




M
Measure the resistance between the terminals with a tester.
(Surrounding temperature 20- 30)
Vane motor (MV1)
NormalConnector Abnormal
282~306Open or short
Yellow
Brown
Red
Brown — Red
Brown — Orange
Brown — Yellow
Brown — Blue
Orange Green
M
PFFY-P20VKM-E2 PFFY-P25VKM-E2 PFFY-P32VKM-E2 PFFY-P40VKM-E2
OCH537

20
0
10
20
30
40
50
-20-100 1020304050
< 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'
25:5.2k'
30:4.3k'
40:3.0k'
Thermistor for
lower temperature
Linear expansion valve
1Operation summary of the linear expansion valve
• Linear expansion valve open/close 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.
1
273+t 1
273
<Connection between the indoor controller board and the linear expansion valve>
OCH537