Mitsubishi Electronics OCH461 User Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

R22R410A

April 2009

No. OCH461

Indoor unit
[Model names] [Service Ref.]

PKFY-P06NBMU-E

PKFY-P06NBMU-E

PKFY-P08NBMU-E

PKFY-P08NBMU-E

INDOOR UNIT

Note:

• This manual describes

only service data of the
indoor units.

• RoHS compliant products

have <G> mark on the
spec name plate.

CONTENTS

1. PART NAMES AND FUNCTIONS

2. SPECIFICATION

3. OUTLINES AND DIMENSIONS

4. WIRING DIAGRAM

5. REFRIGERANT SYSTEM DIAGRAM

6. MICROPROCESSOR CONTROL

7. TROUBLESHOOTING

8. DISASSEMBLY PROCEDURE

.....................................

.................................

..........................

.............

..........

..............

..........

...........

2
4
6
7
8

9
14
21

Model name
indication

PARTS CATALOG (OCB461)

1

PART NAMES AND FUNCTIONS

Indoor unit

Air intake

Filter

Grille

Wireless remote controller

display

OPERATION MODE display
Operation mode display indicates which
operation mode is in effect.

display

The vertical direction of air flow is indicated.

display

FAN SPEED display indicates which fan
speed has been s elected.

ON/OFF button

The unit is turned ON and OFF alternately
each time the button is pressed.

FAN SPEED SELECT button

Used to change the fan speed.

MODE SELECT button

Used to switch the operation mode between
cooling, drying, fan, heating and auto mode.

+ In case the outdoor unit is cool only type,

the heating and auto mode are not
available.

CHECK-TEST RUN button

Only press this button to perform an
inspection check or test operation.
Do not use it for normal operation.

VANE CONTROL button

Used to change the air flow

Louver

Vane

Air outlet

CHECK

TEST RUN

display

CHECK and TEST RUN display indicate that
the unit is being checked or test-run.

MODEL SELECT

Blinks when model is selected.

display

CHECK

TEST RUN

MODEL SELECT

NOT AVAILABLE

ON/OFF TEMP

FAN

MODE

CHECK

VAN E

LOUVER

TEST RUN

RESETSET CLOCK

°F
°C

AMPM

AMPM

AUTO STOP

AUTO START

h

min

display

Lights up while the signal is transmitted to
the indoor unit when the button is pressed.

display

SET TEMP. display indicates the set desired
temperature.

CLOCK display

Displays the current time.

TIMER display

Displays when in timer operation or when
setting timer.

“ ” “ ” display

Displays the order of timer operation.

“ ” “ ” display

Displays whether timer is on or off.

button

SET TEMPERATURE button sets any desired
room temperature.

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.

h and min buttons

Buttons used to set the “hour and minute” of
the current time and timer settings.

LOUVER button

Changes left/right airflow direction.

(Not available for this model.)

CLOCK button

RESET button

SET button

2

Wired remote controller

Display Section

For purposes of this explanation,
all parts of the display are shown
as lit. 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 prohib­ited by a master controller.

“Timer is Off” indicator

Indicates that the timer is off.

Temperature Setting

Shows the target temperature.

Operation Section

Temperature setting buttons

Down

Up

Timer Menu button
(Monitor/Set button)

Mode button (Return button)

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.

TIME SUN MON TUE WED THU FRI SAT
TIMER

AFTER

ERROR CODE

°F°C

Hr

AFTER

°F°C

ONLY1Hr.

Up/Down Air Direction indica­tor

The indicator shows the direc­tion of the outcoming airflow.

“One Hour Only” indicator

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 one hour,
at which time the airflow direction
also changes.

Room Temperature display

Shows the room temperature. The room
temperature display range is 46–102°F.
The display blinks if the temperature
is less than 46°F or 102°F 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.

ON

OFF

FUNCTION

FILTER

WEEKLY

SIMPLE

AUTO OFF

“Sensor” indication

Displayed when the remote controller
sensor is used.

“Locked” indicator

Indicates that remote controller but­tons 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 corre­sponding timer is set.

Fan Speed indicator

Shows the selected fan speed.

Ventilation indicator

Appears when the unit is running in
Ventilation mode.

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

Set Time buttons

Back

Timer On/Off button
(Set Day button)

Opening the
lid

Note:

●

“PLEASE WAIT” message

Ahead

TEMP.

MENU

BACK DAY

MONITOR/SET

PAR-21MAA

CLOCK

ON/OFF

ON/OFF

FILTER

CHECK

OPERATION

Built-in temperature sensor

CLEAR

TEST

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.

●

“NOT AVAILABLE” 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.

33

2

SPECIFICATION

2-1. Specifi cations

Service Ref.

Power source

Cooling capacity
(Nominal)

Power input

Heating capacity
(Nominal )

External finish
External dimension H × W × 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

Optional parts

Remarks

Current input

Power input
Current input

Type × Quantity

External

static press.

Motor type

Motor output

Driving mechanism

Airflow rate

(Low-Mid2-Mid1-High)

Liquid

Gas

Document

Accessory

External heater adapter

Installation

*1

*1

*2

*2

(R410A)

(R22)

(R410A)

(R22)

kW
Btu/h
kW
A
kW
Btu/h
kW
A

mm
in.
kg (lb)

Pa
mmH

2

kW

3

/min

m
L/s
cfm
dB <A>

mm (in.)

mm (in.)

mm (in.)

PKFY-P06NBMU-E

PKFY-P08NBMU-E

1-phase 208/230V 60Hz

1.8

6,000

0.03

0.15

2.0

6,700

0.03

0.15

2.3

8,000

0.03

0.15

2.6

9,000

0.03

0.15

Plastic, MUNSELL (1.0Y 9.2/0.2)

295 × 815 × 225

11-5/8" × 32-1/8" × 8-7/8"

10 (22)

Cross fin (Aluminum fin and copper tube)

Line flow fan × 1

0

O

0

1-phase induction motor

0.008

Direct-driven by motor

4.9 - 5.2 - 5.6 - 5.9
82 - 87 - 93 - 98

170 - 180 - 200 - 210

32 - 33 - 35 -36

4.9 - 5.2 - 5.6 - 5.9
82 - 87 - 93 - 98

170 - 180 - 200 - 210

32 - 33 - 35 -36

Polyethylene sheet

PP honeycomb

Fuse

LEV

R410A, R22 CITY MULTI

ø6.35 (ø1/4")
ø6.35 (ø1/4")
ø12.7 (ø1/2")
ø12.7 (ø1/2")

Flare
Flare
Flare
Flare

ø6.35 (ø1/4")
ø6.35 (ø1/4")
ø12.7 (ø1/2")
ø12.7 (ø1/2")

Flare
Flare
Flare
Flare

I.D. 16mm (5/8")

Installation Manual, Instruction Book

MA remote controller cable

PAC-SA88HA-E

Details on foundation work, insulation work, electrical wiring, power source switch, and other items shall be referred to
the Installation Manual.

Note :

Pipe length :

Level difference :

* Due to continuing improvement, above specification may be subject to change without notice.

*1 Nominal cooling conditions

Indoor :

Outdoor :

80°FDB/67°FWB (26.7°CDB/19.4°CWB)
95°FDB (
25 ft. (7.6 m)
0 ft (

0 m)

35°CDB)

*2 Nominal heating conditions

70°FDB(21°CDB)
47°FDB/43°FWB (8.3°CDB/6.1°CWB)
25 ft. (7.6 m)
0 ft (0 m)

Unit converter

kcal/h = kW × 860
Btu/h = kW × 3,412

3

cfm = m
lb = kg/0.4536

*Above specification data is
subject to rounding variation.

/min × 35.31

4

2-2. Electrical parts specifi cations

Service Ref.

Parts name

Room temperature
thermistor

Liquid pipe thermistor

Gas pipe thermistor

Fuse
(Indoor controller board)

Fan motor
(with thermal fuse)

Fan motor capacitor

Vane motor
(with limit switch)

Linear expansion valve

Power supply terminal
block

Transmission terminal
block

MA remote controller
terminal block

2-3. Sound levels

Symbol

TH21

TH22

TH23

FUSE

MF

C1

MV

LEV

TB2

TB5

TB15

PKFY-P06NBMU-E PKFY-P08NBMU-E

Resistance 30°F/15.8k, 50°F/9.6k, 70°F/6.0k, 80°F/4.8k, 90°F/3.9k, 100°F/3.2k

Resistance 30°F/15.8k, 50°F/9.6k, 70°F/6.0k, 80°F/4.8k, 90°F/3.9k, 100°F/3.2k

Resistance 30°F/15.8k, 50°F/9.6k, 70°F/6.0k, 80°F/4.8k, 90°F/3.9k, 100°F/3.2k

250V 6A

4-Pole Output 8W / PS4N8-KB

1.2 × 440V

MSFBC20 DC12V

DC12V Stepping motor drive

Port :3.2 (0~2000pulse)

(L1, L2, GR) 250V 20A

(M1, M2, S) 250V 20A

(1, 2) 250V 10A

Service Ref.

Sound level at anechoic room : Low-Middle2-Middle1-High

PKFY-P06NBMU-E

PKFY-P08NBMU-E

Sound level dB (A)

32-33-35-36

32-33-35-36

3.3 ft.

Measurement location

* Measured in anechoic room.

2-4. NC curve

(1m)

3.3 ft.
(1m)

PKFY-P06/08NBMU-E

External static pressure : 0Pa
Power source : 208,230V, 60Hz

70.0

MPa

65.0

60.0

55.0

50.0

45.0

40.0

35.0

30.0

25.0

20.0
Approximate minimum

audible limit on

15.0

continuous noise

10.0

OCTAVE BAND PRESSURE LEVEL (dB) 0dB = 20

63 125 250 500 1k 2k 4k 8k

OCTAVE BAND CENTER FREQUENCIES(Hz)

High speed
Low speed

NC60

NC50

NC40

NC30

NC20

55

3

OUTLINES AND DIMENSIONS

PKFY-P06NBMU-E
PKFY-P08NBMU-E

Detailed figure dwg (ABC)
(Knockout hole)

2-1/8(54)

31/32(24.4)

3°

5°

13/32(10) 1-25/32(45)

11-5/8(295)

Knockout hole for

R19/32(R15)

left piping

R19/32(R15)

R5/16(R8)

Knockout hole of

45°

remote control wiring

Required space

30-13/16(783)

25-3/16(640)

25-3/16(640)

26-31/32(660)(Drain pipe total 29-29/32(760))

R19/32(R15)

R5/16(R8)

Knockout holt for
under piping

13/32(10)

3/32(2.5)5/8(16)

2-3/8(60mm) or more for
left and left back piping.

32-1/8(815)

Air intake

27-3/8(695)

17-23/32(450)

20-25/32(520)

1-31/32(50)

3-19/32(91.5)1-25/32(45)

Air intake

Air outlet

R5/16(

13/32(10)

1-11/32(34)

4-3/16(106.7)

1/8(3)

Gas pipe

Liquid pipe

R15/32(R12)

R8)

4-1/2(115)

2-3/8

(60)

4-11/32(110)

4-9/16(116)

Knockout hole of
right piping

Knockout hole for
remote control wiring

5/32(4) 1-31/32(50)

3/32(2.5) 5/8(16)

Air intake

3-15/16(100.6)17/32(14)

Air intake
(Direction)

Power supply

Transmission

Address board

Air outlet
(Direction)

8-7/8(225) 3/16(5)

Air intake
(Direction)

2-7/8

(74.6)

1-7/16(37.8)

Air outlet

Air outlet

Address board
Detailed

Unit : inch (mm)

installaion plate

Terminal block

1/4

(7)

Air intake

Address board

Connection No.

Address setting digit

Mode selection

*3 Address board is protected

by a plastic cover.

Remove the screw holding

the cover with screw-driver

at the time of address setting.

Min55/64(22) Min25/32(20)

Installation plate balance point hole

3/16×1-3/8(4.5×35) 4 holes

Installation plate

6-1/4(159)
5-1/4(133)

4-13/16(122.5)

3-27/32(97.5)

3-11/32(85)

2-27/32(72.5)

2-3/8(60)

1-7/8(47.5)

7/8(22.5)

0

19/32(15)

3-17/32(90)

4-1/32(102.5)

4-7/8(124)

8-:5/32(:4.3) holes

12-29/32(328)

16-1/32(407.5)

12-29/32(328)

11-5/8(295)

10-1/4(260)

9-1/4(235)

Min3-15/16(100)

Min3-35/64(90)

Details of installation plate

0

8-27/32(225)

7-15/32(190)

6-3/32(155)

6-1/4(159)

6-7/8(175)

8-1/16(205)

6-11/16(170)

4-23/32(120)

1-3/16(30)

3-11/32(85)

1-3/16(30)

0

13/32(10)

13/32(10)

Knock of hole

12-:1/8(:2.8)holes

4-:11/ 32( :9)holes

3-11/32(85)

1-3/4(45)

1-23/32(44)

1-31/32(50)

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 use

MA-remote controller cable in an accessories to the connector.

Min1-31/32(50)

7-3/32(180)

7-15/32(190)

6-3/32(155)

4-23/32(120)

6-7/8(175)

8-1/16(205)

6-11/16(170)

Refrigerart
piping

Drain pipe

11-23/32(298)

10-1/4(260)

8-27/32(225)

3/16×1-15/32(4.5×37) 4 holes
3/16×1-9/16(4.5×40) 4 holes

9-1/4(235)

11-23/32(298)

Piping hole:2-9/16(:65)

Liquid pipe

Gas pipe

16-1/32(407.5)

1/4F(:6.35)

1/2F(:12.7)

6-5/8(168)
5-5/16(135)

4-29/32(125)

4-11/32(110)

1-3/8(35)

13/32(10)
0
1-3/32(27.5)
1-9/16(40)
2-3/32(53)
2-9/16(65)

3-7/16(87)

4-7/16(113)
5-1/32(128)

:5/8(:16) I.D

87-:3/16(:5.1)holes

6

WIRING DIAGRAM4

PKFY-P06NBMU-E PKFY-P08NBMU-E

Legend

Symbol

I.B

CN32
CN51
CN52

Indoor controller board

Connector

Name

Remote switch
Centrally control
Remote indication,
External heater

Capacity code

Mode selection

P. B

SW2

Switch

SW3

Indoor power board

ZNR Varistor

Fuse (6A 250V)

FUSE
F. C

Fan phase control
Capacitor (Fan motor)

C1

M

LEV

W.B

SW2SW1

RU

LED2

LED1

9

CNB

BZ

6

YLW

WHT

ORN

11

CN60

LEV

(WHT)

A.B

SW5

208V 230V

SW1

ON

OFF

1234567891

0

1

9

2

8

3

7

4

6

5

10ths
DIGIT1sDIGIT

Note

0

1

9

8

7

4

6

5

0

2

3

(RED)

ADDRESS

CN43

(RED)

ADDRESS

CN82

SW14SW11SW12

E

D

C

B

BRANCH

No.

4

1

0

1

F

2

3

4

5

6

7

A

8

9

8

1

See Fig.1

4

8

ON

OFF

123456789

I.B

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.)

12

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 230V side when the power supply is 230 volts.

When the power supply is 208 volts, set SW5 to 208V side.

Symbol
MF Fan motor
MV
LEV

TB2
TB5
TH21

TH22

TH23

5

9

BLU

BRN

RED

CN5V
VANE
(BLU)

1515

CN52CN51

SW2SW3

1234

10

Vane motor
Linear expansion valve
Terminal

block
Thermistor

RED

1

WHT
BLU

M

ORN
YLW

5

MV

56

141 8

CN42

ADDRESS

(RED)

CN90

WIRELESS

(WHT)

CN32

91

CN81

ADDRESS

(RED)

13

Name

Power supply

Transmission

Room temp.detection
(32°F/15k

,77°F/5.4k)

Pipe temp.detection/Liquid

(32°F/15k,77°F/5.4k)

Pipe temp.detection/Gas

(32°F/15k,77°F/5.4k)

TH23 TH22

t° t° t°

CN29

GAS

(BLK)

14

CN41

13

CN35M

(BLU)

2

112
CN21

LIQUID

(WHT)

ORN

ORN

13

CN3A
MA­REMOCON

(BLU)

5

CN53M

(RED)

CN20

INTAKE

(RED)

1

LED2

TH21

12

Symbol

A.B

W.B

Address board
SW1
SW5
SW11
SW12
SW14

Switch

Mode selection
Voltage selection
Address setting 1s digit
Address setting 10ths digit
Branch No.

Wireless remote controller board
Receving unit

RU

Buzzer

BZ
LED1 LED(Operation indicator:Green)

(Preparation for heating:Orange)

LED

LED2
SW1

Emergency operation (Heat)
Emergency operation (Cool)

SW2

TO MA-REMOTE
CONTROLLER
DC8.7-13V

M
1~

MF

13

CN35P

(BLU)

LED1

P.B

TO OUTDOOR UNIT
BC CONTROLLER
M-NET REMOTE CONTROLLER
DC24-30V

M1 M2

1

2

12

CN2M

M-NET

(BLU)

5

CN53P
(RED)

1

BLU

FAN

(GRN)

F.C

BLU

TB5

RED

WHT

BLK

146

C1

ZNR

U

CND

(RED)

FUSE

250V

6A

Name

BLU

13

RED

<+>

TB2

L1
L2

GR

GRN /YLW

BREAKER
(16A)

TO NEXT
INDOOR UNIT

POWER SUPPLY
208/230V 60Hz

PULL
BOX

FUSE
(16A)

LED on indoor board for service

Mark Meaning

Main power supply

LED1

Power supply for

LED2

MA-Remote controller

MODELS SW2

P06

ON

OFF

1234

<+ >Use copper supply wires.

Function

Main power supply (indoor unit: 208-230V)
power on lamp is lit

Power supply for MA-Remote controller
on lamp is lit

<Fig. 1>

MODELS SW2

P08

ON

OFF

1234

7

5

REFRIGERANT SYSTEM DIAGRAM

PKFY-P06NBMU-E PKFY-P08NBMU-E

Gas pipe temperature thermistor
TH23

Gas pipe

Item

Gas pipe

Liquid pipe

Heat exchanger

Room temperature thermistor
TH21

Models

Liquid pipe temperature thermistor
TH22

Strainer
(#100mesh)

PKFY-P06/08NBMU-E

{12.7 (1/2”)

{6.35 (1/4”)

Strainer
(#100mesh)

Linear expansion

valve

Strainer
(#100mesh)

Unit: mm(inch)

Flare

Liquid pipe

8