Mitsubishi Electric City Multi PLFY-P08NCMU-E Operating manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
INDOOR UNIT
CONTENTS
1. TECHNICAL CHANGES........................................... 2
2. FEATURES................................................................3
3. PART NAMES AND FUNCTIONS............................. 4
4. SPECIFICATIONS.....................................................6
5. 4-WAY AIR FLOW SYSTEM......................................9
6. OUTLINES AND DIMENSIONS...............................11
7. WIRING DIAGRAM..................................................12
8. REFRIGERANT SYSTEM DIAGRAM
........................14
9. MICROPROCESSOR CONTROL...........................15
10. TROUBLESHOOTING............................................. 22
11. DISASSEMBLY PROCEDURE................................29
R410A / R22
No. OCH410
REVISED EDITION-B
June 2009
NOTE:
• This manual describes
only service data of the
indoor units.
Indoor unit
[model names] [Service Ref.]
PLFY-P08NCMU-E PLFY-P08NCMU-E.TH
PLFY-P08NCMU-E1.TH
PLFY-P08NCMU-ER2.TH
PLFY-P12NCMU-E PLFY-P12NCMU-E.TH
PLFY-P12NCMU-E1.TH
PLFY-P12NCMU-ER2.TH
PLFY-P15NCMU-E PLFY-P15NCMU-E.TH
PLFY-P15NCMU-E1.TH
PLFY-P15NCMU-ER2.TH
PARTS CATALOG (OCB410)
Revision:
• PLFY-P08/12/15NCMU-
ER2.TH are added in
REVISED EDITION-B.
• Some descriptions have
been modified.
• Please void OCH410
REVISED EDITION-A.
Model name
indication

2
1TECHNICAL CHANGES
PLFY-P08NCMU-E1.TH PLFY-P08NCMU-ER2.TH
PLFY-P12NCMU-E1.TH PLFY-P12NCMU-ER2.TH
PLFY-P15NCMU-E1.TH PLFY-P15NCMU-ER2.TH
• The following functions of CONTROLLER BOARD (C.B) have been changed.
* Initial setting of auto restart function Not effective →effective (SW1-9 OFF →ON)
* External heating control change
PLFY-P08NCMU-E.TH PLFY-P08NCMU-E1.TH
PLFY-P12NCMU-E.TH PLFY-P12NCMU-E1.TH
PLFY-P15NCMU-E.TH PLFY-P15NCMU-E1.TH
• PANEL has been changed.
SLP-15AAU (White : 0.70Y 8.59/0.97) →SLP-15AAUW (Pure white : 6.4Y 8.9/0.4)

3
2FEATURES
1. PERFECT PANEL SIZE
The brand new 22-7/16 inch PLFY-P08/12/15NCMU-E models are slim, attractive, yet poweful units.
PLFY-P08/12/15NCMU-E’s size and shape, which perfectly match 2-by-2 ceilings, and its lighter weight of 34 lbs
(PLFY-P08NCMU-E) make installation even easier and more convenient.
2. 29 dB WHISPER-QUIET OPERATION (PLFY-P08NCMU-E)
Ideal for cafés, bars, restaurants, and shops. Give all your customers the comfortable environment they deserve.
3. 2,500 HOUR LONG LIFE FILTER
Greatly reduces the frequency the filter needs to be replaced, making maintenance all the easier.
4. FRESH AIR INTAKE
Provides indoor air of the highest quality.
5. SMUDGE-FREE AIRFLOW
Reduces annoying drafts and smudging.
6. SLIM UNIT BODY FOR EASY INSTALLATION
The 22-7/16 inch slim body and octagonal shape, which make the distance between bolts only 16-17/32 inch, help installa-
tion easy and maintenance trouble-free.
Models Cooling capacity / Heating capacity
PLFY-P08NCMU-E 8,000 / 9,000 Btu/h
PLFY-P12NCMU-E 12,000 / 13,500 Btu/h
PLFY-P15NCMU-E 15,000 / 17,000 Btu/h
Indoor Unit
Ceiling surface
9-1/4
8-3/16
Unit 22-7/16
T-bar
20-7/8
16-17/32
22-7/16
Suspension bolt pitch
22-11/16
23-5/8
Unit : inch

4
Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.
Grille
Filter
Removes dust and pollutants
from return air.
Horizontal Air Outlet
Sets horizontal airflow automatically
during cooling or dehumidifying.
Air Intake
Returns air from room.
3PART NAMES AND FUNCTIONS
Indoor (Main) Unit
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
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
lid
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
Built-in temperature sensor
Wired remote controller
Once the controllers are set, the same operation mode can be repeated by simply pressing the ON/OFF button.

5
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
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.
“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.
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 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
Shows the direction 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.
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,
when the airflow direction also
changes.

6
4SPECIFICATIONS
4-1. SPECIFICATIONS
Note 1. Rating conditions
Cooling :Indoor : D.B. 80°F W.B. 67°F
outdoor :D.B. 95°F W.B. 75°F
Heating : Indoor : D.B. 70°F
outdoor :D.B. 47°F W.B. 43°F
Note 2. The number indicated in < > is for the grille.
W3. Air flow and the noise level are indicated as Low - Medium - High.
Item
Btu/h
Btu/h
kW
kW
A
A
—
in
in
in
—
—
CFM
CFM
Pa
kW
—
—
in
in
in
dB
lb
Cooling capacity
Power
Heat exchanger
Insulator
Air filter
Fan × No.
Pipe
dimensions
Field drain pipe size
Noise level 3
Product weight
Exterior
(munsell symbol)
Fan motor
output
External
static pressure
Liquid
side
Gas
side
Heating capacity
Dimensions
Height
Width
Depth
Electric characteristic
Input
Cooling
Heating
Cooling
Heating
Current
PLFY-P08NCMU-E.TH
PLFY-P08NCMU-E1.TH
PLFY-P08NCMU-ER2.TH
8,000
9,000
0.05
0.05
0.23
0.23
280-320-350
250-290-320
0.015
29-32-38
34<7>
15,000
17,000
0.06
0.06
0.28
0.28
31-35-40
12,000
13,500
0.06
0.06
0.28
0.28
30-34-39
Single phase 208/230V 60Hz
V·Hz
Air flow
3
DRY
WET
Unit : Galvanized sheets with gray heat insulation
Grilles : ABS resin Munsell<0.7Y 8.59/0.97>(PLFY-P·NCMU-E.TH) / <6.4Y 8.9/0.4>(PLFY-P·NCMU-E1/ER2.TH)
22-7/16<25-19/32>
22-7/16<25-19/32>
Cross fin
Turbo fan × 1
0
Polyethylene sheet
PP honey comb fabric
1/2"
1/4"
O.D1-1/4"
8-3/16<25/32>
320-350-390
290-320-350
0.020
37<7>
F a n
PLFY-P12NCMU-E.TH
PLFY-P12NCMU-E1.TH
PLFY-P12NCMU-ER2.TH
PLFY-P15NCMU-E.TH
PLFY-P15NCMU-E1.TH
PLFY-P15NCMU-ER2.TH

7
UNIT
5ft
MICROPHONE
CEILING
4-2. NOISE CRITERION CURVES
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
High
Medium
39
SPL(dB)
34
LINE
NOTCH
Low 30
PLFY-P12NCMU-E.TH
PLFY-P12NCMU-E1.TH
PLFY-P12NCMU-ER2.TH
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
High
Medium
40
SPL(dB)
35
LINE
NOTCH
Low 31
PLFY-P15NCMU-E.TH
PLFY-P15NCMU-E1.TH
PLFY-P15NCMU-ER2.TH
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
PLFY-P08NCMU-E.TH
PLFY-P08NCMU-E1.TH
PLFY-P08NCMU-ER2.TH
High
Medium
38
SPL(dB)
32
LINE
NOTCH
Low 29
NOTE: The sound level is measured in an anechoic
room where echoes are few, when compres-
sor stops. The sound may be bigger than the
indicated level in actual use due to surround-
ing echoes. The sound level can be higher by
about 2 dB than the indicated level during cool-
ing and heating operation.

8
4-3. ELECTRICAL PARTS SPECIFICATIONS
Parts name
Model
Symbol
TH21
TH22
TH23
FUSE
MF
C1
MV
DP
DS
LEV
H2
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 6.3A
PLFY-P08NCMU-E.TH
PLFY-P08NCMU-E1.TH
PLFY-P08NCMU-ER2.TH
PLFY-P12NCMU-E.TH
PLFY-P12NCMU-E1.TH
PLFY-P12NCMU-ER2.TH
PLFY-P15NCMU-E.TH
PLFY-P15NCMU-E1.TH
PLFY-P15NCMU-ER2.TH
Thermistor
(Room temperature
detection)
Thermistor
(Pipe temperature
detection/ Liquid)
Thermistor
(Pipe temperature
detection/ Gas)
Fuse
(Indoor controller board)
Fan motor
(with Thermal fuse)
Electric heater
(Condensation proof)
Power supply terminal
block
Transmission terminal
block
MA remote controller
terminal block
6-pole OUTPUT 15W
PK6N15-LA
6-pole OUTPUT 20W
PK6N21-LA
6-pole OUTPUT 20W
PK6N20-LA
Fan motor capacitor
Vane motor
Drain pump
Drain sensor
Linear expansion valve
[coil]
+Note: Refer to WIRING DIAGRAM for the supplied voltage.
Thermal fuse OFF 284F$36F
1.5× 440V
MSBPC20M13
DC12V 300
 /phase
PLD-12230ME-1
INPUT 12/10.8W 241/Hr
Thermistor resistance 30F/6.3k, 50F/3.9k, 70F/2.5k, 80F/2.0k, 90F/1.6k, 100F/1.3k
DC12V Stepping motor drive, Port dimension :3.2 (0~2000pulse)
EDM-40YGME
240V 15W
(L1, L2,GR) Rated to 330V 30A +
(M1, M2, S) Rated to 250V 20A +
(1, 2) Rated to 250V 10A +

9
54-WAY AIR FLOW SYSTEM
5-3. OPERATION IN CONJUNCTION
WITH DUCT FAN (BOOSTER FAN)
• Whenever the indoor unit is operating, the duct
fun also operates.
(1) Connect the optional multiple remote control-
ler adapter (PAC-SA88HA-E) to the connector
CN51 on the indoor controller board.
(2) Drive the relay after connecting the 12V DC
relay between the Yellow and Orange con-
nector wires.
(*) Use a relay of 1W or smaller.
MB: Electromagnetic switch power relay for duct
fan.
X: Auxiliary relay (For DC 12V, coil rating : 1.0W
or below)
5-1. FRESH AIR INTAKE (Location for installation)
At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when required.
Refrigerant pipe Drain pipe
Electrical Box
Fresh air intake Fresh air intake hole diagram (Unit : inch)
3 - W1/8
Burring hole W3-15/16
Burring hole pitch
W2-7/8
(Cut out hole)
Ceiling surface
120"
120"
4-21/32
Static pressure : P [in. W.G.%10-2]
Air flow : Q [CFM]
20
-20
-40
-60
-80
-100
-120
020 40 60 80 100 120
PLFY-P08NCMU-E(1).TH PLFY-P12NCMU-E(1).TH PLFY-P15NCMU-E(1).TH
PLFY-P08NCMU-ER2.TH PLFY-P12NCMU-ER2.TH PLFY-P15NCMU-ER2.TH
Taking air into the unit
5-2. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
Q
0
BA
C
1Curve in the
left graphs
Duct characteristics
at site
Q
A
EC
2
Q
Qa
AD
3
NOTE: Fresh air intake amount should be 20% or less of
whole air amount to prevent dew dripping.
CN51
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
Distance between indoor
controller board and relay
must be within 33ft.
Be sure to secure insulation
material by tape, etc.
5Green
Yellow
Orange
Connector (5P)
Indoor unit side Multiple remote
controller adapter
PAC-SA88HA-E
Be sure to secure insulation
material by tape, etc.
Installation at site
CN51
on
indoor unit
board
Red
Brown
1
~
CN51
MB
How to read curves
Q…Designed amount of fresh air intake
<CFM>
A…Static pressure loss of fresh air
intake duct system with air flow
amount Q <in. W.G.o10-2>
B…Forced static pressure at air condi-
tioner inlet with air flow amount Q
<in. W.G.o10-2>
C…Static pressure of booster fan with
air flow amount Q <in. W.G.o10-2>
D…Static pressure loss increase
amount of fresh air intake duct sys-
tem for air flow amount Q
<in. W.G.o10-2>
E…Static pressure of indoor unit with
air flow amount Q <in. W.G.o10-2>
Qa…Estimated amount of fresh air
intake without D <CFM>

10
5-4. FIXING HORIZONTAL VANE
Horizontal vane of each air outlet can be fixed according to the environment where it is installed.
Setting procedure
1) Turn off a main power supply (Turn off a breaker).
2) Disconnect the vane motor connector of the direction of the arrow with pressing the unlocking button as shown in figure
below.
Insulate the disconnected connector with the plastic tape.
Vane motor
Horizontal vane
Connector Unlocking button
Vane motor
3) Set a vertical vane of the air outlet, which is to be fixed by the hand slowly within the range in the table below.
Measured standard posi-
tion of the grille
Horizontal vane
< Specified range >
Up/down airflow
direction Horizontal 30° Downward 45° Downward 55° Downward 70°
A21 mm
13/16 inch
25 mm
31/32 inch
28 mm
1-3/32 inch
30 mm
1-3/16 inch
· The vanes can be set between 21mm, 13/16 inch and 30 mm, 1-3/16 inch.
Caution:
Do not set the up/down vanes passed the specified range. Condensation could form and drop from the ceiling,
or the unit could malfunction.

11
OUTLINES AND DIMENSIONS
6
PLFY-P08NCMU-E.TH PLFY-P12NCMU-E.TH PLFY-P15NCMU-E.TH Unit : inch(mm)
PLFY-P08NCMU-E1.TH PLFY-P12NCMU-E1.TH PLFY-P15NCMU-E1.TH
PLFY-P08NCMU-ER2.TH PLFY-P12NCMU-ER2.TH PLFY-P15NCMU-ER2.TH
Detail drawing of fresh air intake
Ceiling surface
Cut out hole
:2-7/8(:73.4)
Burring hole
3-:1/8(:2.8)
:3-15/16(:100)
4-21/32(118)
1(25)
120
120
+5
0
(27 )
+3/16
0
1-1/16
Unit : inch(mm)
19/32~1-15/32(15~37) 19/32~1-15/32(15~37)
22-11/16~24-13/32(576~620)
22-7/16(570)
20-7/8(530)
1
2
2
Grille
Fresh air
intake
Drain pipe
VP-25 connection
(O.D.:1-1/4(:32))
Vane motor
Drain hole
Models
Air intake grille
2-5/32(55) 1-3/8(35)
1-3/8(35) 2-5/32(55)
Auto vane
Grille
Air intake hole
Air intake hole
Air outlet hole
Air outlet hole
11-27/32(301)
11-27/32(301)
14-27/32(377)
14-27/32(377)
25-19/32(650)
Suspension bolt M10 or W3/8
Suspension bolt lower edge
9-1/16(230)
7-5/32(182)1-7/8(48)
Wiring entry
Terminal block Ceiling surface
9-1/4(235)
8-3/16(208)
7-19/32(193)
25/32(20)
3-21/32(93)
1-1/2~2-9/32(38~58)
2-19/32(66)
4-3/4(121)
21/32(17) 7-15/16(202)
2-7/32(56)
2-1/14(57)
3-7/16(87)
1-7/32(31)
Ceiling hole
Suspension bolt pitch
19/32~1-15/32(15~37) 19/32~1-15/32(15~37)
22-11/16~24-13/32(576~620)
16-17/32(420)
22-7/16(570)
13-3/16(335)
7-27/32(199)
13-27/32(352)
13-3/16(335)
Suspension bolt pitch
Ceiling hole
25-19/32(650)
PLFY-P08NCMU-E(1).TH
PLFY-P08NCMU-ER2.TH
PLFY-P12NCMU-E(1).TH
PLFY-P12NCMU-ER2.TH
PLFY-P15NCMU-E(1).TH
PLFY-P15NCMU-ER2.TH
Brand label
Refrigerant pipe
(1/2 (12.7) dia.)
flared connection
Refrigerant pipe
(1/4 (6.35) dia.)
flared connection
V/M
V/M
V/M
V/M
1

12
WIRING DIAGRAM
7
PLFY-P08NCMU-E.TH PLFY-P12NCMU-E.TH PLFY-P15NCMU-E.TH
PLFY-P08NCMU-E1.TH PLFY-P12NCMU-E1.TH PLFY-P15NCMU-E1.TH
DP
WHT
(DRAIN)
WHT
FAN
(FAN)
See Fig.1
MODELS
P08
P12
P15
<Fig.1>
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
SW2
Power supply for MA-Remote controller on →Lamp is lit.
Main power supply(Indoor unit:208-230V) power on →Lamp is lit.Main power supply
Power supply for
MA-Remote controller
LED2
LED1
Mark Meaning
LED on indoor controller board for service
Function
CN32
(REMOTE SWITCH)
WHT
321
DC24-30V
CONTROLLER
TO NEXT INDOOR UNIT
PULL BOX
FUSE(15A)
BREAKER
(15A)
60Hz
HA
1234
WHT
CN41 CN51
WHT
(CENTRALLY
CONTROL)
54321
CN52
(REMOTE
INDICATION)
GRN
12345
REMOTE SWITCHCN32
X7 FAN MOTOR (Me)
X6 FAN MOTOR (Hi)
X5 FAN MOTOR (Lo)
SW1 SWITCH MODE SELECTION
CONNECTION No.SW14
SW12
SW11 ADDRESS SETTING 1ST DIGIT
ADDRESS SETTING 2ND DIGIT
MODEL SELECTION
MODE SELECTION
CAPACITY CODE
SW4
SW3
SW2
(32F/15kΩ77F/5.4kΩ)
(32F/15kΩ77F/5.4kΩ)
DP DRAIN PUMP
DS DRAIN SENSOR
H2 DEW PREVENTION HEATER
FAN MOTOR (LL)
DRAIN PUMP/DEW PREVENTION HEATERX1 AUX. RELAY
SYMBOL NAME
VARISTOR
INDOOR POWER BOARD
P. B
ZNR
X4
I.B
CN41
CN51
CN52
FUSE FUSE (6.3A/250V)
REMOTE INDICATION
CENTRALLY CONTROL
HA TERMINAL-A
CONNECTOR
INDOOR CONTROLLER BOARD
[LEGEND]
NAMESYMBOL
PIPE TEMPERATURE DETECTION/GAS
TH23
TRANSMISSION
TERMINAL
BLOCK
POWER SUPPLY
TB5
TB15
TB2
(32F/15kΩ77F/5.4kΩ)
THERMISTOR ROOM TEMPERATURE DETECTION
TH22
TH21
LEV LINEAR EXPANSION VALVE
MV
MF
VANE MOTOR
FAN MOTOR (WITH THERMAL FUSE)
CAPACITOR (FAN MOTOR)
C1
PIPE TEMPERATURE DETECTION/LIQUID
MA-REMOTE CONTROLLER
LED2
LED1
3113
CND
(POWER)
YLW
21
YLW
13
BLU
(D•U•M)
CNC
(D•HEATER)
RED
ORN
FUSE
ZNR
CNP
X1
RED
ORN
GRILLE
BLU
5
WHT
BLU
RED
ORN
YLW
RED
RED
1
10
7
2
3
6
4
5
8
9
3
5
5
5
5
C1
15
BLK
YLW
WHT
BRN
79
X6 X5 X4 X7
X4 X7 X5X6
MF
I.B
CN20
CN31
123
BLU
WHT
ORN
RED
YLW
6
654321
(VANE)
CN6V
GRN
RED
ORN
BLU
654321
(LEV)
CN60
WHT
WHT
YLW
BRN
BLK
2211
(LIQUID)
(INTAKE)
CN21
RED WHT
21
(GAS)
CN29
(REMOCON)
WHT
13
RED
P. B
RED
CNDK
(POWER
BORD)
1
2
3
AC208-230V
CNSK(RED)
TB2
L1
L2
GR
RED
BLU
GRN/YLW
~/N 208-230V
POWER SUPPLY
TRANS DC13.1V
CN2S(WHT)
2
1
21
(POWER BORD)
CN2D
WHT
WHT
BLK
M1
1
2
CONTROLLER
DC8.7-13V
TO MA-REMOTE
CN2M
(M-NET)
1231
CN3A
BLU
BLU
M2
TB15
S(SHIELD)
M-NET REMOTE
TO OUTDOOR UNI
T
BC CONTROLLER
TB5
X1
TH23
TH22
TH21DS
LEV
5
3RD
DIGIT
0
O
0
0N
0FF
SW1
12345678910
SW12 SW11
1ST
DIGIT
0
2ND
DIGIT
SW14
CONNECTION
No.
12345
0FF
0N
SW4
SW2
65432110987654321
0FF
0N SW3
MV
H2
MV
MV
MV
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. (Transmisson wire 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 switch differs in the capacity. For the detail, refer to Fig.1.
7. Use copper supply wire.

13
(RED)
(RED)
MODELS
P08
P12
P15
<Fig.1>
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
SW2
Power supply for MA-Remote controller on →Lamp is lit.
Main power supply(Indoor unit:208-230V) power on →Lamp is lit.Main power supply
Power supply for
MA-Remote controller
LED2
(RED)
LED1
(RED)
Mark Meaning
LED on indoor controller board for service
Function
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. (Transmisson wire 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 switch differs in the capacity. For the detail, refer to Fig.1.
7. Use copper supply wire.
Fig.1
PLFY-P08NCMU-ER2.TH PLFY-P12NCMU-ER2.TH PLFY-P15NCMU-ER2.TH

14
REFRIGERANT SYSTEM DIAGRAM8
Strainer (#50mesh)
Strainer (#100 mesh)
Strainer1 (#50 mesh)
Strainer2 (#100 mesh)
Heat exchanger
Room temperature
thermistor TH21
Gas pipe thermistor TH23
Liquid pipe thermistor TH22
Linear expansion valve
Gas pipe
Liquid pipe
Flare connection
Gas pipe
Liquid pipe
1/2
1/4
Refrigerant flow in cooling
Refrigerant flow in heating
Unit : inch
PLFY-P08NCMU-E.TH PLFY-P12NCMU-E.TH PLFY-P15NCMU-E.TH
PLFY-P08NCMU-E1.TH PLFY-P12NCMU-E1.TH PLFY-P15NCMU-E1.TH
PLFY-P08NCMU-ER2.TH PLFY-P12NCMU-ER2.TH PLFY-P15NCMU-ER2.TH

15
MICROPROCESSOR CONTROL9
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
ûF ûC
°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
INDOOR UNIT CONTROL
9-1. COOL OPERATION
Control modes Control details
1-1. Thermoregulating 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 compressor's 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 completed by
thermoregulating, etc.
 The operation modes became mode other than COOL.
The operation stopped.
By the remote controller setting (switch of 3 speeds)
2. Fan
1. Thermoregulating
function
Remarks
Type Fan speed notch
[Low], [Med], [High]
3 speeds type
Continued to the next page
<How to operate>
1 Press POWER ON/OFF button.
2 Press the operation MODE button to display COOL.
3 Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 1°F(2°F) when the or button is
pressed once. Cooling 67 to 87°F
Variable range of the set temprature depends on the remote controller
which is applied.

16
→
3
2
1
→
Control modes Control details
3-1. Drain pump control
• Always drain pump ON during the COOL and DRY mode operation.
(Regardless of the thermo ON/ OFF)
• When the operation mode has changed from the COOL or DRY to the
others (including Stop), OFF the control after the drain pump ON for 3
minutes.
Drain sensor function
• Energize drain sensor at a fixed voltage for a fixed duration. After energizing,
compare the drain sensor’s temperature to the one before energizing, and judge
whether the sensor is in the air or in the water.
Basic control system
• While drain pump is turned on, repeat the following control system and judge
whether the sensor is in the air or in the water.
• Drain sensor temperature rise (∆t)
• Temperature of drain sensor before current is applied (T0)
• Temperature of drain sensor after current is applied (T1)
[ ∆t = T1– T0]
(1)Initial setting : Start at COOL mode and horizontal vane.
(2)Vane position : Horizontal →Downward A →Downward B →Downward C→Swing
(3)Restriction of the downward vane setting
When setting the downward vane A, B or C in [Med] or [Low] of the fan
speed notch, the vane changes to horizontal position after 1 hour.
4. Vane
(up/down vane change)
3. Drain pump
Remarks
Drain sensor
Indoor control
P.C. board
CN31
"Only 1 Hr"
appears on the
wired remote
controller.
Timing of
energizing
drain sensor
ON
OFF
Stand by for
a minute
30
sec.
30
sec.
Detect the
temperature
before
energizing
(T0)
Detect the
temperature
after
energizing
(T1)
Judge whether
the sensor is in
the air or in the
water.
Stand by for
a minute
·······Repeat
From the preceding page

17
Control modes Control details
1-1. Thermo regulating function (Function to prevent restarting for 3 minutes)
Setting the Dry thermo by the thermo regulating 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 controll depends on the compressor conditions.
3. Drain pump
1. Thermo regulating
function
Remarks
Room
temperature
3 min. passed since starting operation
Thermo regulating 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
ON
OFF
[Low]
Stop
4. Vane
(up/down vane change)
Same control as COOL operation
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
°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
9-2. DRY OPERATION
<How to operate>
1 Press POWER ON/OFF button.
2 Press the operation MODE button to display DRY.
3 Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 1°F(2°F) when the or button is
pressed once. Dry 67 to 87°F
Variable range of the set temprature depends on the remote controller
which is applied.

18
Control modes Control details
Set by remote controller.
2. Drain pump
Remarks
1. Fan
Type Fan speed notch
3 speeds type [Low], [Med], [High]
3. Vane
(up/down vane change)
2-1. Drain pump control
The drain pump turns ON for the specified amount of time when any of the following
conditions is met:
ON for 3 minutes after the operation mode is switched from COOL or DRY to
another operation mode (FAN).
ON for 6 minutes after the drain sensor is determined to be submerged using the
liquid level detection method given below.
ON for 6 minutes after indoor piping (liquid piping) temperature – indoor intake
temperature -18°F, AND the drain sensor input is at the short or open level.
(If condition or is still being met after the drain pump has been turned ON for 6
minutes, the drain pump is kept ON for further 6 minutes.)
2-2. Liquid level detection method
The liquid level is detected by determining whether or not the drain sensor is
submerged, based on the amount the temperature rises after self-heating the
sensor. This process is performed if any of the following conditions is met:
Drain pump is ON.
Indoor piping (liquid piping) temperature – indoor intake temperature -18°F
Indoor piping (liquid piping) temperature or indoor intake temperature is at the
short or open level temperature.
Every 1 hour after the drain pump has been switched from ON to OFF and 1
hour have passed.
Same as the control performed during the COOL operation, but no restriction on the
vane's downward blow setting
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
ûF ûC
°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
9-3. FAN OPERATION
<How to operate>
1 Press POWER ON/OFF button.
2 Press the operation MODE button to display FAN.

19
Control modes Control details
1-1. Thermoregulating function (Function to prevent restarting for 3 minutes)
•
Room temperature desired temperature -2°F ···Thermo ON
•
Room temperature  desired temperature ···Thermo OFF
1. Thermoregulating
function
Remarks
Controlled by the remote controller (3-speed)
Give priority to controlled mode mentioned below.
2-1. Hot adjust mode
2-2. Residual heat exclusion mode
2-3. Thermo OFF mode (When the compressor off by the thermoregulating)
2-4. Cool air prevention mode (Defrosting mode)
2-5. Capacity increasing mode
2-1. Hot adjust mode
The fan controller becomes the hot adjust mode for the following conditions.
When starting the HEAT operation

When the thermoregulating function changes from OFF to ON.
When release the HEAT defrosting operation
2. Fan
A: Hot adjust mode start
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 A (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 (thermoregulating 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.
Continued to the next page
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
ûF ûC
°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
9-4. HEAT OPERATION
<How to operate>
1 Press POWER ON/OFF button.
2 Press the operation MODE button to display HEAT.
3 Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 1°F(2°F) when the or button is
pressed once. Heating 63 to 83°F
Variable range of the set temprature depends on the remote controller
which is applied.
<Display in HEAT operation>
[DEFROST]
The [DEFROST] symbol is only displayed during the defrost operation.
[STANDBY]
The [STANDBY] symbol is only displayed during hot adjust mode.

20
→
Control modes Control details
2. Fan
Remarks
2-3. Thermo OFF mode
When the thermoregulating function changes to OFF, the indoor fan operates in
[Extra low].
2-4. Heat defrosting mode
The indoor fan stops.
No drain pump operation
However, when the control changes from COOL or DRY operation, the drain pump
operates for 3 minutes.
(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→Swing
(3) Restriction of vane position
The vane is horizontally fixed for the following modes.
(The setting by the remote controller is temporarily invalidated and vane control is
set by the unit controller.)
• Thermo OFF
• Hot adjust [Extra low] mode
• Heat defrost mode
3. Drain pump
4. Vane control
(Up/down vane
change)
From the preceding page