Mitsubishi Electric City Multi PKFY Series Operating manual

TECHNICAL & SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES.........................2
2. PART NAMES AND FUNCTIONS..........2
3. SPECIFICATION.....................................5
4. OUTLINES AND DIMENSIONS..............7
5. WIRING DIAGRAM.................................8
6. REFRIGERANT SYSTEM DIAGRAM..........9
7. MICROPROCESSOR CONTROL.........10
8. TROUBLESHOOTING..........................15
9. DISASSEMBLY PROCEDURE.............23
Indoor unit
[Model names] [Service Ref.]
PKFY-P06NBMU-E
PKFY-P06NBMU-ER1
PKFY-P08NBMU-E
PKFY-P08NBMU-ER1
No. OCH461
REVISED EDITION-B
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R22R410A
Note:
•This manual describes only
service data of the indoor
units.
•RoHS compliant products
have <G> mark on the
spec name plate.
September 2012
PARTS CATALOG (OCB461)
INDOOR UNIT
Model name
indication
PKFY-P06NBMU-E
PKFY-P08NBMU-E
Revision:
•"8-2. Function of Dip
switch" has been modified.
•Some descriptions have
been modified.
•Please void OCH461
REVISED EDITION-A.

Indoor unit
Filter
Grille
Louver
Air outlet
Air intake
Vane
1TECHNICAL CHANGES
PKFY-P06NBMU-E PKFY-P06NBMU-ER1
PKFY-P06NBMU-E PKFY-P06NBMU-ER1
HEAT EXCHANGER and WATER CUT have been changed.
2PART NAMES AND FUNCTIONS
2
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.
OCH461B

33
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
°F
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 button
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.
button
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.
+In case 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.
Wireless remote controller
OCH461B

4
Wired remote controller
°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 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.
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.
OCH461B

55
2.3
8,000
0.03
0.15
2.6
9,000
0.03
0.15
Note : Unit converter
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 × 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
Power input
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
kW
Btu/h
kW
A
kW
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
*2
*2
(R410A)
(R22)
(R410A)
(R22)
Installation Manual, Instruction Book
PAC-SA88HA-E
1-phase 208/230V 60Hz
Cross fin (Aluminum fin and copper tube)
1-phase induction motor
Direct-driven by motor
Polyethylene sheet
PP honeycomb
Fuse
LEV
R410A, R22 CITY MULTI
PKFY-P06NBMU-E
PKFY-P06NBMU-ER1
Plastic, MUNSELL (1.0Y 9.2/0.2)
1.8
6,000
0.03
0.15
2.0
6,700
0.03
0.15
295 × 815 × 225
11-5/8" × 32-1/8" × 8-7/8"
10 (22)
Line flow fan × 1
0
0
0.008
I.D. 16mm (5/8")
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
PKFY-P08NBMU-E
PKFY-P08NBMU-ER1
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
*1 Nominal cooling conditions
Indoor :
Outdoor :
Pipe length :
Level difference :
80°FDB/67°FWB (26.7°CDB/19.4°CWB)
95°FDB (35°CDB)
25 ft. (7.6 m)
0 ft (0 m)
*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)
* Due to continuing improvement, above specification may be subject to change without notice.
MA remote controller cable
Details on foundation work, insulation work, electrical wiring, power source switch, and other items shall be referred to
the Installation Manual.
3SPECIFICATION
3-1. Specifications
OCH461B

6
Parts name
Service Ref. Symbol
TH21
TH22
TH23
FUSE
MF
C1
MV
LEV
TB2
TB5
TB15
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
(L1, L2, GR) 250V 20A
(M1, M2, S) 250V 20A
(1, 2) 250V 10A
Liquid pipe thermistor
Gas pipe thermistor
PKFY-P06NBMU-E
PKFY-P06NBMU-ER1 PKFY-P08NBMU-E PKFY-P08NBMU-ER1
Room temperature
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
DC12V Stepping motor drive
Port :3.2 (0~2000pulse)
MA remote controller
terminal block
* Measured in anechoic room.
3.3 ft. (1m)
Measurement location
PKFY-P06NBMU-E
PKFY-P06NBMU-ER1
PKFY-P08NBMU-E
PKFY-P08NBMU-ER1
32-33-35-36
Sound level dB (A)
Sound level at anechoic room : Low-Middle2-Middle1-High
Service Ref.
32-33-35-36
3.3 ft.
(1m)
3-2. Electrical parts specifications
3-3. Sound levels
3-4. NC curve
PKFY-P06/08NBMU-E(R1)
External static pressure : 0Pa
Power source : 208,230V, 60Hz
OCTAVE BAND PRESSURE LEVEL (dB) 0dB = 20MPa
OCTAVE BAND CENTER FREQUENCIES(Hz)
Approximate minimum
audible limit on
continuous noise
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
63 125 250 500 1k 2k 4k 8k
NC60
NC50
NC40
NC30
NC20
High speed
Low speed
OCH461B

77
OUTLINES AND DIMENSIONS
4
Detailed figure dwg (ABC)
(Knockout hole)
5/32(4) 1-31/32(50)
3/32(2.5) 5/8(16)
1-11/32(34)
13/32(10)
13/32(10) 1-25/32(45)
5°
3°
31/32(24.4)
45°
Knockout hole for
left piping
2-1/8(54)
3-19/32(91.5)1-25/32(45)
3/32(2.5)
5/8(16)
1-31/32(50)
13/32(10)
Knockout holt for
under piping
Knockout hole for
remote control wiring
Knockout hole of
remote control wiring
Knockout hole of
right piping
R5/16(R8)
R15/32(R12)
R5/16(R8)
R19/32(R15)
R19/32(R15)
R19/32(R15)
R5/16(R8)
3/16×1-3/8(4.5×35) 4 holes
8-:5/32(:4.3) holes
Installation plate
Piping hole:2-9/16(:65)
87-:3/16(:5.1)holes
4-:11/32(:9)holes
12-:1/8(:2.8)holes
3/16×1-15/32(4.5×37) 4 holes
3/16×1-9/16(4.5×40) 4 holes
Installation plate balance point hole
Knock of hole
2-3/8(60mm) or more for
left and left back piping.
Terminal block
Air intake
(Direction)
Address board
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.
Transmission
Power supply
Address board
Detailed
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.
Connection No.
Address board
(Direction)
installaion plate
Air intake
Air outlet
(Direction)
Required space
:5/8(:16) I.D
1/2F(:12.7)
1/4F(:6.35)
Drain pipe
Liquid pipe
Gas pipe
Refrigerart
piping
Liquid pipe
Gas pipe
Air outlet
Air intake
Air intake
13/32(10)
13/32(10)
16-1/32(407.5)
11-23/32(298) 10-1/4(260) 8-27/32(225)
7-15/32(190)
6-3/32(155) 4-23/32(120) 3-11/32(85) 1-3/16(30)
16-1/32(407.5)
12-29/32(328) 11-5/8(295) 10-1/4(260) 8-27/32(225) 7-15/32(190)
6-3/32(155)
4-23/32(120) 3-11/32(85) 1-3/16(30)
5-1/4(133)
2-27/32(72.5)
3-11/32(85)
1-7/8(47.5)
2-3/8(60)
7/8(22.5)
0
4-13/16(122.5)
4-1/32(102.5)
19/32(15)
12-29/32(328)
6-5/8(168)
4-7/16(113)
3-7/16(87)
5-5/16(135)
4-11/32(110)
1-3/8(35)
13/32(10)
4-7/8(124)
3-17/32(90)
6-1/4(159)
2-9/16(65)
1-9/16(40)
5-1/32(128)
11-23/32(298)
9-1/4(235)
8-1/16(205)
6-7/8(175)
6-11/16(170)
0
1-3/4(45)
4-29/32(125)
2-3/32(53)
1-3/32(27.5)
0
7-3/32(180)
6-1/4(159)
0
3-27/32(97.5)
8-1/16(205)
6-11/16(170)
9-1/4(235)
6-7/8(175)
1-23/32(44)
1-31/32(50)
Details of installation plate
Min55/64(22) Min25/32(20)
Min3-15/16(100)
Min3-35/64(90)
Min1-31/32(50)
1-7/16(37.8)
1/4
(7)
Air intake
25-3/16(640)
Air intake
32-1/8(815)
4-1/2(115)
4-3/16(106.7)
1/8(3)
11-5/8(295)
2-3/8
(60)
25-3/16(640)
27-3/8(695)
8-7/8(225) 3/16(5)
4-11/32(110)
4-9/16(116)
26-31/32(660)(Drain pipe total 29-29/32(760))
17-23/32(450)
20-25/32(520)
3-15/16(100.6)17/32(14)
30-13/16(783)
2-7/8
(74.6)
Air outlet
Air outlet
PKFY-P06NBMU-E
PKFY-P08NBMU-E
PKFY-P06NBMU-ER1
PKFY-P08NBMU-ER1
Unit : inch (mm)
OCH461B

8
WIRING DIAGRAM5
Mark Meaning
LED1 Main power supply Main power supply (indoor unit: 208-230V)
power on lamp is lit
Function
LED on indoor board for service
ON
OFF 1234
MODELS SW2
P06 ON
OFF 1234
MODELS SW2
P08
<Fig. 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,
External heater
Capacity code
Mode selection Room temp.detection
(32°F/15k,77°F/5.4k)
Pipe temp.detection/Liquid
(32°F/15k,77°F/5.4k)
Name
Indoor controller board
P.B W.B Indoor power board
ZNR Varistor
FUSE
Fuse (6A 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
(32°F/15k,77°F/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 230V side when the power supply is 230 volts.
When the power supply is 208 volts, set SW5 to 208V 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
Branch No.
Receving unit
Buzzer
Wireless remote controller board
MV
MRED
WHT
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
208/230V 60Hz
RED RED WHT BLK BLU
GRN /YLW
BLU BLU
1TB5 2
TO MA-REMOTE
CONTROLLER
DC8.7-13V
ORN ORN
ZNR FUSE
250V
6A
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
208V 230V
A.B
W.B
ON
OFF
P.B
4
8
1234567891
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
SW2SW1
LED1 BZ t° t° t°
M
M
1~
LEV
M1M2
U
L1
L2
13 12
1515
< + >
GR
<+>Use copper supply wires.
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
SW14SW11SW12
10ths
DIGIT 1s DIGIT BRANCH No.
0
PKFY-P06NBMU-E PKFY-P08NBMU-E
PKFY-P06NBMU-ER1 PKFY-P08NBMU-ER1
OCH461B

9
6REFRIGERANT SYSTEM DIAGRAM
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
PKFY-P06NBMU-E PKFY-P08NBMU-E
PKFY-P06NBMU-ER1 PKFY-P08NBMU-ER1
Unit: mm(inch)
Service ref.
Item PKFY-P06/08NBMU-E
PKFY-P06/08NBMU-ER1
Gas pipe {12.7 (1/2”)
Liquid pipe {6.35 (1/4”)
OCH461B

10
7MICROPROCESSOR CONTROL
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
ûF ûC
ûF ûC
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
INDOOR UNIT CONTROL
7-1. COOL OPERATION
<How to operate>
Press POWER ON/OFF button.
Press the operation MODE button to display COOL.
Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 2°F when the or button is
pressed one time. Cooling 67 to 87°F
Control modes Control details
1-1. Thermo stat function (Function to prevent restarting for 3 minutes)
• Room temperature desired temperature + 2°F
···Thermo ON
• Room temperature desired temperature ···Thermo OFF
1-2. Anti-freezing control
Detected condition : When the liquid pipe temp. (TH22) is 32°F or less in 16
minutes from compressors start up, anti-freezing control
starts and the thermo OFF.
Released condition : The timer which prevents reactivating is set for 3 minutes,
and anti-freezing control is cancelled when any one of the
following conditions is satisfied.
Liquid pipe temp. (TH22) turns 50°F or above.
The condition of the thermo OFF has become complete
by thermo stat, etc.
The operation modes became mode other than COOL.
The operation stopped.
By the remote controller setting (switch of 4 speeds)
2. Fan
1. Thermo stat
function
Remarks
Type Fan speed notch
[Low], [Mid2], [Mid1], [High]
4 speeds type
→
(1)Initial setting: Start at COOL mode and horizontal vane.
(2)Vane position:
Horizontal →Downward A →Downward B →Downward C
(3)Restriction of the downward vane setting
When setting the downward vane A, B or C in [Mid] or [Low] of the fan speed
notch, the vane changes to horizontal position after 1 hour have passed.
3. Vane
(up/down vane change)
· "ONLY 1 Hr"
appears on the
wired remote
controller.
OCH461B