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

1111
Control modes Control details
1-1. Thermo stat function (Function to prevent restarting for 3 minutes)
Setting the Dry thermo by the thermo stat signal and the room
temperature (TH21).
Dry thermo ON Room temperature desired temperature + 2°F
Dry thermo OFF Room temperature desired temperature
1-2. Freeze prevention control
No control function
Indoor fan operation controlled depending on the compressor conditions.
1. Thermo stat
function
Remarks
Room
temperature 3 min. passed since starting operation
Thermo stat signal
Room temperature (T1)
Dry thermo
ON
time (min)
Dry thermo
OFF
time (min)
Less than 64°F
Over 64°F ON
OFF
T1 83°F
83°F > T1 79°F
79°F > T1 75°F
75°F > T1
Unconditional
93
73
53
33
10
3
Dry thermo OFF
2. Fan
Note: Remote controller setting is not acceptable.
Dry thermo Fan speed notch
Excluding the following
Room temp. < 64°F
ON
OFF
[Low]
[Low]
Stop
3. Vane
(up/down vane change)
Same control as COOL operation
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
7-2. DRY OPERATION
<How to operate>
Press POWER ON/OFF button.
Press the operation MODE button to display DRY.
Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 2°F when the or button is
pressed one time. Dry 67 to 87°F
OCH461B

12
Control modes Control details
Set by remote controller.
Remarks
1. Fan
Type Fan speed notch
4 speeds type [Low], [Mid2], [Mid1], [High]
2. Vane
(up/down vane change)
Same as the control performed during the COOL operation, but with no restriction
on the vane's downward blow setting · Same control
as COOL
operation
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
7-3. FAN OPERATION
<How to operate>
Press POWER ON/OFF button.
Press the operation MODE button to display FAN.
OCH461B

13
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. Thermo stat
function
Remarks
2-1. Hot adjust mode
The fan controller becomes the hot adjuster mode for the following conditions.
When starting the HEAT operation
When the thermo stat function changes from OFF to ON.
When release the HEAT defrosting operation
2. Fan
A: Hot adjust mode starts.
B: 5 minutes have passed since the condition A or the indoor liquid pipe
temperature turned 95°F or more.
C: 2 minutes have passed since the condition B. (Terminating the hot adjust mode)
ACB
[Extra Low]
[Low] Set fan speed by the remote controller
Hot adjust mode *1
2-2. Residual heat exclusion mode
When the condition changes the auxiliary heater ON to OFF (thermo stat or
operation stop, etc), the indoor fan operates in [Low] mode for 1 minute.
· This control is
same for the
model without
auxiliary heater.
*1
"STAND BY"
will be displayed
during the hot
adjust mode.
To be continued on the next page.
By the remote controller setting (switch of 4 speeds)
Give priority to under-mentioned controlled mode
2-1. Hot adjust mode
2-2. Residual heat exclusion mode
2-3. Thermo OFF mode (When the compressor off by the thermo stat)
2-4. Cool air prevention mode (Defrosting mode)
Type Fan speed notch
[Low], [Mid2], [Mid1], [High]
4 speeds type
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
7-4. HEAT OPERATION
<How to operate>
Press POWER ON/OFF button.
Press the operation MODE button to display HEAT.
Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 2°F when the or button is
pressed one time. Heating 63 to 83°F.
<Display in HEAT operation>
[DEFROST]
The [DEFROST] symbol is only displayed during the defrost operation.
[STANDBY]
The [STANDBY] symbol is only displayed during the hot adjust mode.
OCH461B

14
→
Control modes Control details
2. Fan
Remarks
2-3. Thermo OFF mode
When the thermo stat function changes to OFF, the indoor fan operates in
[Extra low].
2-4. Heat defrosting mode
The indoor fan stops.
(1) Initial setting: OFF →HEAT···[last setting]
When changing the mode from exception of HEAT to HEAT operation
···[Downward C]
(2) Vane position:
Horizontal →Downward A →Downward B →Downward C
(3) Restriction of vane position
The vane is horizontally fixed for the following modes.
(The control by the remote controller is temporally invalidated and control by
the unit.)
•Thermo OFF
•Hot adjust [Extra low] mode
•Heat defrost mode
3. Vane control
(Up/down vane
change)
From the preceding page
Control modes Control details
HEAT mode for room temperature < Desired temperature
COOL mode for room temperature Desired temperature
(1) HEAT mode →COOL mode
Room temperature Desired temperature + 3°F. or 3 min. has passed
(2) COOL mode →HEAT mode
Room temperature Desired temperature - 3°F. or 3 min. has passed
1. Initial value of
operation mode
Remarks
2. Mode change
Same control as cool operation
3. COOL mode
Same control as heat operation
4. HEAT mode
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
7-5. AUTO OPERATION [AUTOMATIC COOL/HEAT CHANGE OVER OPERATION]
<How to operate>
Press POWER ON/OFF button.
Press the operation MODE button to display AUTO.
Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 2°F when the or button is
pressed one time. Automatic 67 to 83°F
OCH461B

1515
TROUBLESHOOTING
8
8-1. HOW TO CHECK THE PARTS
PKFY-P06NBMU-E PKFY-P08NBMU-E
PKFY-P06NBMU-ER1 PKFY-P08NBMU-ER1
Parts name Check points
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 50°F~86°F)
Disconnect the connector then measure the resistance value with a tester.
(Coil temperature 68°F)
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
200± 10%
Abnormal
(1)-(5)
White-Red (2)-(6) Yellow-Brown (3)-(5) Orange-Red (4)-(6) Blue-Brown Open or short
1
2
3
4
5
6
LEV
White
Yellow
Orange
Blue
Red
Brown
CN60
Vane motor (MV) Measure the resistance between the terminals with a tester. (At the ambient temperature 77°F)
Normal Normal
400± 7%
Abnormal
-
Red-White - Red-Blue - Red-Orange - Red-Yellow Open or short
Measure the resistance between the terminals with a tester. (At the ambient temperature 68°F)
Fan motor (MF)
Abnormal
Open or short
White-Black
Red-Black
Normal
313± 8%
108± 8%
Orange
White
Red Yellow
Blue
4
2
1
53
Connect pin No.
M
White
Red
Black
1
4
6
FAN
OCH461B

16
8-1-2. Liner expansion valve
8-1-1. Thermistor
4Φ4
3
6
5
Φ3
2Φ2
1Φ1
Φ4
Φ3
Φ2
Φ1
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=15kΩ± 3%
Fixed number of B=3480 ± 2%
Rt=15exp { 3480( ) }
30°F 15.8kΩ
50°F 9.6kΩ
70°F 6.0kΩ
80°F 4.8kΩ
90°F 3.9kΩ
100°F 3.2kΩ
Thermistor for
lower temperature
Operation 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 signals.
<Connection between the indoor controller board and the linear expansion valve>
1
273+(t-32)/1.8 1
273
0
10
20
30
40
50
0-20 20 40 60 80 100 120
< Thermistor for lower temperature >
Temperature (°F)
Resistance (kΩ)
OCH461B

17
6
5
4
3
2
1
LED1kΩ
Symptom Check points
Operation circuit
failure of the micro
processor
Disconnect the connector on the controller board, then con-
nect LED for checking.
When power is turned on, pulse signals will be output for 10
seconds. There must be some defects in the operation circuit
if the LED does not light while the signals are output or keeps
lighting even after the signals stop.
Countermeasures
Exchange the indoor con-
troller board at drive circuit
failure.
Linear expansion
valve mechanism is
locked.
Valve does not close
completely.
Wrong connection
of the connector or
contact failure
To check the linear expansion valve, operate the indoor unit
in fan mode and at the same time operate other indoor units
in cooling mode, then check the pipe temperature <liquid
pipe temperature> of the indoor unit by the
outdoor multi controller board operation
monitor. During fan operation, linear expan-
sion valve is closed completely and if there
is any leaking, detecting temperature of
the thermistor will go lower. If the detected
temperature is much lower than the tem-
perature indicated in the remote controller,
it means the valve is not closed all the way.
It is not necessary to exchange the linear expansion valve, if
the leakage is small and not affecting normal operation.
Thermistor
(Liquid pipe)
Linear
expansion
valve
Motor will idle and make a ticking noise when the motor is
operated while the linear expansion valve is locked.
This ticking sound is the sign of the abnormality.
Check the color of lead wire and missing terminal of the con-
nector.
Exchange the linear expan-
sion valve.
Exchange the linear expan-
sion valve.
If large amount of refriger-
ant is leaked, exchange
the linear expansion valve.
Disconnect the connector
at the controller board,
then check the continuity.
Measure the resistance between each coil (white-red, yellow-
brown, orange-red, blue-brown) using a tester. It is normal if
the resistance is in the range of 200Ω±10%.
Short or breakage
of the motor coil of
the linear expansion
valve
Output
(Phase) Output
[11
ON
[2ON
[3OFF
[4OFF
2
OFF
ON
ON
OFF
3
OFF
OFF
ON
ON
4
ON
OFF
OFF
ON
<Output pulse signal and the valve operation>
Linear expansion valve operation
Trouble shooting
D
A
E
B
C
Open
Open
Extra tightening (200~800 pulse)
Pulse number
Outdoor unit R410A model : 1400 pulse
Outdoor unit R22 model : 2000 pulse
Opening a valve all the way
Close
Close
Valve position (capacity)
Closing a valve : 1 →2 →3 →4 →1
Opening a valve : 4 →3 →2 →1 →4
The output pulse shifts in above order.
Note:
• When linear expansion valve operation stops, all output phase
become OFF.
• At phase interruption or when phase does not shift in order, motor
does not rotate smoothly and motor will lock and vibrate.
• When the switch is turned on, 2200 pulse closing valve signal will
be sent till it goes to point in order to define the valve position.
• When the valve moves smoothly, there is no sound or vibration
occurring from the linear expansion valves, however, when the
pulse number moves from to or when the valve is locked,
more sound can be heard than in a normal situation.
• Sound can be detected by placing the ear against the screw driver
handle while putting the screw driver tip to the linear expansion
valve.
OCH461B

18
8-2. Function of Dip switch
PKFY-P06NBMU-E PKFY-P08NBMU-E
PKFY-P06NBMU-ER1 PKFY-P08NBMU-ER1
1
2
3
4
5
6
7
8
9
10
Thermistor<Room temperature>
position
ON OFF
Filter clogging detection Provide Not provide
Filter cleaning sign 2,500 hr 100 hr
Fresh air intake Not effective Not effective
Thermo ON signal indication
Humidifier control Fan operation at Heating mode
Thermo ON operation at
heating mode
Low +1 Extra low +1
Setting air flow +1 Depends on SW1-7
Auto restart function Effective Not effective
PowerON/OFF by breaker Effective Not effective
ON
OFF 12345678910
Address board
<Initial setting>
SW1
Mode
Effective
timing
Under
suspension
selection
Switch Pole
Function Operation by switch
Remarks
Built-in remote controller
Indoor unit
+
1
SW1-7
OFF
ON
OFF
ON
SW1-8
OFF
OFF
ON
ON
Fan speed
Extra low
Low
Setting air flow
Stop
+2 It is impossible to intake
the fresh air.
Air flow set in case of heat
thermo OFF
NOTE:
+2
1~6
1
2
3
4
5
6
7
8
ON OFF
Heat pump/Cool only Cooling only Heat pump
Louver
Vane
Vane swing
Second setting +3 First setting
Effective Not effective
Heating 4 degree (4 °C) up
Not effective Effective
Target superheat setting
+2
—
——
——
—
Tartget subcool setting
+2
——
ON
OFF 1234567891
Indoor controller board
<Initial setting>
SW3
Function
selection
Under
suspension
SW2
Capacity
code
Before
power
supply
ON
switch
Effective
timing
Switch Pole
Function Operation by switch
Remarks
Changing the opening of linear
expansion valve
+1
Second setting is the same as
first setting.
+2 Please do not use SW3-9,10
as trouble might be caused
by the usage condition.
Models SW2
P06
P08
Indoor controller board
ON
OFF 1234
ON
OFF 1234
Available Not available
Vane horizontal angle
Vane cooling limit angle setting
+1
Horizontal angle Down B, C
+3
At cooling mode, each angle
can be used only 1 hour.
9
10
0
Remote indication
(CN52-2 output signal) External heater signal +3
+3SW1-5 has different function for the listed models.
The standard function of SW1-5 for the listed models are different from that for other models.
When SW1-5 is OFF, even with the free contact function of TG-2000, the external heater signal function of the remote display cannot be changed.
When the free contact function of TG-2000 is used, set SW1-5 to ON together with SW1-9 and SW1-10.
OCH461B

19
J41, J42
Wireless
remote
controller
Pair No.
Jumper
<Initial setting>
Pattern A
Setting pattern J41 J42
Indoor controller
jumper wire Pair No. of wireless
remote controller
Initial setting
A
B
D
C
—
Cut
Cut
—
—
—
Cut
Cut
0
1
3
2—
—
—
Pair No.4-9 of wireless remote controller is setting pattern D.
ON/OFF TEMP
FAN
VANE
MODE
CHECK
LOUVER
TEST RUN
AUTO STOP
AUTO START
h
min
RESET
SET CLOCK
MODEL SELECT
Model No.
Temperature
button
SET button
Pair No.
Minute
button
• To operate each indoor unit by each remote controller when installed 2 indoor
units or more are near, Pair No. setting is necessary.
Pair No.setting is available with the 4 patterns (Setting patterns A to D). .
Make setting for J41, J42 of indoor controller board and the Pair No. of
wireless remote controller.
•You may not set it when operating it by one remote controller.
Setting for indoor unit
Cut jumper wire J41, J42 on the indoor controller board according to the
table below.
Wireless remote controller pair number:
Setting operation
1. Press the SET button (using a pointed implement). Check that the
remote controller's display has stopped before continuing.
MODEL SELECT flashes, and the model No. (3 digits) appears (steadily-lit).
2. Press the MINUTE button twice.The pair number appears flashing.
3. Press the temperature buttons to select the pair number to set.
4. Press the SET button (using a pointed implement).The set pair number is
displayed (steadily-lit) for 3 seconds, then disappears.
Operation by switch
Switch Remarks
Under
operation
or
suspension
Effective
timing
0
5
9
4
8
3
7
2
6
1
SW12
10
0
5
9
4
8
3
7
2
6
1
SW11
1
0
8
F
7
E
6
D
5
C
4
B
3
A
2
9
1
SW14
0
5
9
4
8
3
7
2
6
1
SW12 0
5
9
4
8
3
7
2
6
1
SW11
0
8
F
7
E
6
D
5
C
4
B
3
A
2
9
1
SW14
Address board
Addressboard
<Initial setting>
<Initial setting>
SW11
1s digit
address
setting
SW12
10ths digit
address
setting
Rotary switch
SW14
Branch
No.
Setting
Rotary Switch
How to set addresses
Example : If address is "3", remain SW12
(for over 10) at "0", and match SW11 (for 1 to 9)
with "3".
How to set branch numbers SW14 (Series R2 only)
Match the indoor unit’s refrigerant pipe with
the BC controller’s end connection number.
Remain other than series R2 at "0".
Before
power
supply
ON
OCH461B

20
8-3. TEST POINT DIAGRAM
8-3-1. Indoor controller board
PKFY-P06NBMU-E PKFY-P08NBMU-E
PKFY-P06NBMU-ER1 PKFY-P08NBMU-ER1
CN52
Remote indication
1-2
: Status lamp 12VDC (1: +)
External heater 12VDC
(1: +)
(SW1-5 OFF)
Thermostat ON (SW1-5 ON)
1-3: Cooling/Dry status lamp
12VDC (1: +)
1-4: Heating status lamp
12VDC (1: +)
CN3A
Connected to the
MA-Remote controller
Between 1 to 38.7-13V DC
(Pin1(+))
CN29
Pipe temperature
thermistor/Gas (TH23)
CN21
Pipe temperature
thermistor/Liquid (TH22)
CN90
Connected to the wireless
remote controller board (W.B)
CN60
Linear expansion
valve output (LEV)
12VDC pulse output
SW3
Mode selection
CN51
Centrally control
1-2: Control signal
12VDC pulse input (1: +)
3-4: Operation indicator
12VDC (3: +)
3-5: Malfunction indicator
12VDC (3: +)
SW2
Capacity setting
CN5V
Vane motor output
(MV)
12VDC pulse output
CN20
Room temperature
thermistor (TH21)
CN53M
Connected to the indoor power board (CN53P)
Between 1 to 224-30V DC (non-polat)
Between 3 to 512.5-13.7V DC (Pin3(+))
Between 4 to 511.5-12.7V DC (Pin4(+))
CN35M
Connected to the indoor
power board (CN35P)
LED2
Power supply for
MA-Remote controller
CN41
Connector
(HA terminal-A)
CN32
Connector
(Remote switch)
J41, J42
Wireless remote
controller Pair No.
setting
CN81
Connected to the
address board (CN82)
CN42
Connected to the
address board (CN43)
OCH461B