Mitsubishi City Multi Series PLFY-P12NAMU-E Operating manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
[Models] PLFY-P12NAMU-E
PLFY-P15NAMU-E
PLFY-P18NAMU-E
PLFY-P24NAMU-E
PLFY-P30NAMU-E
PLFY-P36NAMU-E
No. OC340
REVISED EDITION-A
INDOOR UNIT
CONTENTS
1. FEATURES····························································· 2
2. PART NAMES AND FUNCTIONS ························· 3
3. SPECIFICATIONS·················································· 5
4. 4-WAY AIR FLOW SYSTEM·································· 8
5. OUTLINES AND DIMENSIONS····························· 11
6. WIRING DIAGRAM ················································ 12
7. REFRIGERANT SYSTEM DIAGRAM ······················· 13
8. MICROPROCESSOR CONTROL·························· 14
9. TROUBLE SHOOTING ·········································· 21
10. DISASSEMBLY PROCEDURE ······························ 26
11. PARTS LIST ··························································· 29
12. RoHS PARTS LIST ················································ 32
13. OPTIONAL PARTS················································· 35
August 2006
R410A / R22
NOTE:
• This manual describes only
service data of the indoor
units.
• RoHS compliant products have
<G> mark on the spec name
plate.
• For servicing of RoHS compli-
ant products, refer to the RoHS
PARTS LIST.
Revision:
• RoHS PARTS LIST is added.
• Some descriptions have been
modified.
• Please void OC340.
OC340A--1.qxp 06.7.25 0:39 PM Page 1

2
1FEATURES
1. SPACE-SAVING CENTRALLY LOCATED CEILING RECESSED INSTALLATION
2. 4-WAY AIR FLOW SYSTEM
This series allows you to select from 2, 3, and 4 way air flow directions according to your requirement. As a result, you get
superb flexibility in choosing a configuration that gives you maximum cooling/heating efficiency in a neat and unobstructive
installation.
Models Cooling capacity / Heating capacity
PLFY-P12NAMU-E 12,000 / 13,500 Btu/h
PLFY-P15NAMU-E 15,000 / 17,000 Btu/h
PLFY-P18NAMU-E 18,000 / 20,000 Btu/h
PLFY-P24NAMU-E 24,000 / 27,000 Btu/h
PLFY-P30NAMU-E 30,000 / 34,000 Btu/h
PLFY-P36NAMU-E 36,000 / 40,000 Btu/h
Indoor Unit
5. HIGH RELIABILITY AND EASY SERVICING.
3. DRAIN PUMP FOR EASY PIPE CONNECTION (DRAIN LIFT-UP MECHANISM)
This mechanism, with its capacity to raise drain water 33-7/16 inch above the ceiling line, is convenient for removing water
and avoiding piping contact with beams, etc.
4. FRESH AIR INTAKE AND BRANCH DUCTING ARE AVAILABLE (on-site work)
33-7/16
Unit:in.
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3
2PART NAMES AND FUNCTIONS
● Indoor (Main) Unit
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 airflow horizontal automatically
during cooling or dehumidifying.
Air Intake
Returns air from room.
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
Set Temperature 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
door.
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 preceding operation
number.
Ventilation button
(Operation button)
To next operation number.
● Remote controller
● Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.
● Operation buttons
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4
Caution
●Only the Power on indicator lights when the unit is stopped and power supplied to the unit.
●If you press a button for a feature that is not installed at the indoor unit, the remote controller will display the “Not Available”
message.
If you are using the remote controller to drive multiple indoor units, this message will appear only if the feature is not pre-
sent at every unit connected.
●When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indica-
tion (For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappear then start the operation.
●Display
For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.
˚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
Identifies the current operation
Shows the operating mode, etc.
* Multilanguage display is sup-
ported.
“Centrally Controlled” indicator
Indicates that operation of the re-
mote 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, shows the time
remaining.
“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
Comes 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
Displayed if the airflow is set to
Low and downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off after one
hour, at which time the airflow di-
rection also changes.
Room Temperature display
Shows the room temperature.
Louver display
Indicates the action of the swing
louver. Does not appear if the
louver is stationary.
(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.
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5
3SPECIFICATIONS
3-1. 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 just for the grille.
W3. Air flow and the noise level are indicated as Low - Medium2 - Medium1 - 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
Unit drain pipe size
Noise level W3
Product weight
Exterior
(munsell symbol)
Fan motor
output
External
static pressure
Liquid
side
Gas
side
Heating capacity
F
a
n
Dimensions
Height
Width
Depth
Electric characteristic
Input
Cooling
Heating
Cooling
Heating
Current
PLFY-P12NAMU-E PLFY-P18NAMU-E PLFY-P24NAMU-E PLFY-P30NAMU-E PLFY-P36NAMU-E
12,000
13,500
0.14
0.14
0.68
0.68
390-420-460-490
350-380-410-440
24-27-28-30
18,000
20,000
0.14
0.14
0.68
0.68
490-530-570-640
470-500-530-600
27-28-31-33
PLFY-P15NAMU-E
15,000
17,000
0.14
0.14
0.68
0.68
420-460-490-570
380-410-470-530
27-28-30-32
30,000
34,000
0.27
0.27
1.30
1.30
710-810-920-990
670-770-870-930
3/8"
34-36-40-41
36,000
40,000
0.27
0.27
1.30
1.30
780-880-990-1060
730-830-930-1000
5/8" / 3/4"
(Compatible)
37-40-43-44
24,000
27,000
0.14
0.14
0.68
0.68
530-570-640-710
500-530-600-670
PVC with O.D.1-1/4"
28-30-33-34
Single phase 208/230V 60Hz
V·Hz
11-3/4<1-3/16>
0.110
5/8"
53<11> 66<11>
Air flow
W3
DRY
WET
Unit : Galvanized sheets with gray heat insulation Grills : ABS resin Munsell<0.70Y 8.59/0.97>
33-1/16<37-3/8>
33-1/16<37-3/8>
Cross fin
Turbo fan ✕1
0
Polyethylene sheet
PP honey comb fabric
10-3/16<1-3/16>
0.070
1/2"
1/4"
49<11>
1/2" / 5/8"
(Compatible)
1/4" / 3/8" (Compatible)
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6
3-2. 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 re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
PLFY-P12NAMU-E
High
Medium1
Medium2
Low
NOTCH 30
28
27
24
SPL(dB) LINE
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 re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
PLFY-P18NAMU-E
High
Medium1
Medium2
Low
NOTCH 33
31
28
27
SPL(dB) LINE
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 re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
PLFY-P24NAMU-E
High
Medium1
Medium2
Low
NOTCH 34
33
30
28
SPL(dB) LINE
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 re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
PLFY-P15NAMU-E
High
Medium1
Medium2
Low
NOTCH 32
30
28
27
SPL(dB) LINE
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7
UNIT
5ft
MICROPHONE
CEILING
Ambient temperature 80˚F
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 re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
PLFY-P36NAMU-E
High
Medium1
Medium2
Low
NOTCH 44
43
40
37
SPL(dB) LINE
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 re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
PLFY-P30NAMU-E
High
Medium1
Medium2
Low
NOTCH 41
40
36
34
SPL(dB) LINE
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8
3-3. ELECTRICAL PARTS SPECIFICATIONS
Parts name
Model Symbol
TH21
TH22
TH23
FUSE
MF
C
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 6A
240V 21.8W
(L1, L2, GR) 330V 30A
(M1, M2, S) 250V 20A
(1, 2) 250V 10A
Liquid pipe thermistor
Gas pipe thermistor
Fan motor capacitor
Vane motor
Drain-up mechanism
Drain sensor
Linear expansion valve
PLFY-P12NAMU-E PLFY-P18NAMU-EPLFY-P15NAMU-E PLFY-P24NAMU-E PLFY-P30NAMU-E PLFY-P36NAMU-E
Room temperature
thermistor
Fuse
(Indoor controller board)
Fan motor
(with inner-thermostat)
Electric heater
(Condensation proof)
Power supply terminal
block
Transmission terminal
block
MA remote controller
terminal block
6-pole OUTPUT 110W D176P110MS
Inner-thermostat OPEN 266°F i9_F
6-pole OUTPUT 70W D17D6P70MS
MSBPC20M13
DC12V 300
" /phase
PLD-12220ME-2
INPUT 12/10.8W 24R/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
DC12V Stepping motor drive port
dimension [ 5.2 (0~2000pulse)
EDM-80YGME
3.0+✕440V 7.0+✕440V
44-WAY AIR FLOW SYSTEM
4-1. PLACEMENT OF THE AIR OUTLETS
• For this grille, the blowout direction comes in 11 patterns.
Also, by setting the dip switches (SWA and SWB) on the address board to the appropriate settings, you can adjust the air
flow and speed. Select the settings from Table according to the location in which you want to install the unit.
1) Decide on the pattern of the airflow direction.
Blowout direction
pattern
4-direction<Table 1> 3-direction 2-direction Note1.
For 3 and 2-directional,
please use the air outlet
shutter plate (option).
Pattern 1 Factory setting Pattern 4 One air outlet
fully closed Pattern 6 Two air outlet fully closed
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9
4-2. FRESH AIR INTAKE (INSTALLATION OF SITE)
• At the time of installation, use the duct holes (cutout) located at the positions shown in following diagram, as and when required.
Note :
Be sure to add5-5/16inch to the dimensions in the diagram that are marked with a “w” if installing a multi function
casement (Option)
1
Standard
8.9
9.8
10.8
2
High ceiling 1
9.8
10.8
11.5
(Unit : feet)
(Unit : feet)
3
High ceiling 2
11.5
11.5
—
4 direction
3 direction
2 direction
SWA
SWB
PLFY-P12, P15, P18NAMU-E
PLFY-P24, P30, P36NAMU-E
4
3
2
1
Standard
10.5
11.8
13.1
2
High ceiling 1
11.8
13.1
13.8
3
High ceiling 2
13.8
13.8
—
4 direction
3 direction
2 direction
SWA
SWB
4
3
2
2) According to the number of air outlets and height of the ceiling to install the unit, be sure to set up the switches
(SWA, SWB) on the indoor board to the appropriate setting.
• Correspondence of ceiling heights to numbers of air outlets.
Fresh air intake hole
Fresh air intake hole diagram (Unit : inch)
3 - {1/8
Burring hole {4-29/32
Burring hole pitch
{3-15/16
(Cut out hole)
Refrigerant pipe Drain pipe Ceiling surface
120_
120_
w6-7/32
4-3. INTERLOCKING OPERATION
METHOD WITH DUCT FAN
(BOOSTER FAN)
• Whenever the indoor unit is operating, the duct fun also
operates.
(1)Connect the optional multiple remote controller
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 connector lines.
(w)Use a relay under 1W.
MB: Electromagnetic switch power relay for duct fan.
X: Auxiliary relay (12V DC LY-1F)
CN51
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
Distance between indoor
controller board and relay
must be within 10m.
Be sure to secure insulation
material by tape and such
5Green
Yellow
Orange
Connector (5P)
Indoor unit side Multiple remote
controller adapter
PAC-SA88HA-E Be sure to secure insulation
material by tape and such
Installation at site
CN51
on
indoor unit
board Red
Brown
1
~
CN51
MB
(208V) (230V)
11
22
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10
Static pressure [in. W.G.]
Air flow [CFM]
2.0
50 100 150 200
0.2
0.4
0.6
0.8
0
2 intakes
1 intake
2 intakes
1 intake
Static pressure [in. W.G.]
Air flow [CFM]
2.0 50 100 150 200
0.2
0.4
0.6
0.8
0
Static pressure [in. W.G.]
Air flow [CFM]
2.0
50 100 150 200
0.2
0.4
0.6
0.8
0
Air flow
[CFM]
2 intakes
1 intake
Static pressure [in. W.G.]
2.0
50 100 150 200 250 300
0.2
0.4
0.6
0.8
0
Air flow
[CFM]
2 intakes
1 intake
Static pressure [in. W.G.]
2.0 50 100 150 200 250 300
0.2
0.4
0.6
0.8
0
Air flow [CFM]
Static pressure [in. W.G.]
2.0
50 100 150 200 250 300
0.2
0.4
0.6
0.8
0
llPLFY-P12 /P15 /P18 /P24NAMU-E
Multifunction casement + Standard filter
22PLFY-P30 /P36NAMU-E
Multifunction casement + High efficiency filter
Taking air into the unit
Multifunction casement + Standard filter Multifunction casement + High efficiency filter
Taking air into the unit
4-4. 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
Q…Planned amount of fresh air intake
A…Static pressure loss of fresh air
intake duct system with air flow
amount Q
B…Forced static pressure at air condi-
tioner inlet with air flow amount Q
C…Static pressure of booster fan with
air flow amount Q
D…Static pressure loss increase
amount of fresh air intake duct sys-
tem for air flow amount Q
E…Static pressure of indoor unit with air
flow amount Q
Qa…Estimated amount of fresh air
intake with out D <CFM>
<CFM>
<in.W.G.>
<in.W.G.>
<in.W.G.>
<in.W.G.>
How to read curves
<in.W.G.>
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11
2
1
3-5/16
(84)
3-5/32
(80)
3-1/2
(89)
11-1/16
(281) 11-3/4
(298)
5/8F / 3/4F
([15.88/[19.05)
(Compatible)
5/8F
([15.88)
1/2F
([12.7)
3/8F
([9.52)
D
3
(76)
PLFY-P36NAMU-E
(20~45)
(20~45)
(50~70)
PLFY-P24NAMU-E
PLFY-P18NAMU-E
PLFY-P30NAMU-E
PLFY-P12NAMU-E
PLFY-P15NAMU-E
2-[1-1/16(27)
Wiring entrance holes
3-11/32
(85)
10-3/16
(258)
9-1/2
(241)
C
B
A
1/4F
([6.35)
1/2F / 5/8F
([12.7/[15.88)
(Compatible)
1/4F / 3/8F
([6.35/[9.52)
(Compatible)
Models
High efficiency filter
& Fresh air intake casement(option)
(Cut out hole)
Detail drawing of fresh air intake
(Cut out hole)
3-[1/8([2.8)
Burring hole
Ceiling surface
Branch duct hole
Branch
duct
hole
Branch duct hole
Fresh air intake
Suspension bolt pitch
Ceiling hole
Suspension bolt pitch
Ceiling hole
Terminal block
Suspension
bolt
lower edge
Feeding hole
(Drain pump)
Ceiling surface
Drain pipe
O.D.[1-1/4([32) connection
(VP-25)
Suspension bolt
W3/8(M10)
Drain hole
Vane motor
M
M
M
M
Air intake hole
Air outlet hole
Air outlet hole
6-1/4(159)
25/32~1-25/32(20~45) 25/32~1-25/32(20~45)
6-1/4(159)
1(26)
23-13/16(605)
33-27/32~35-13/16(860~910)
33-1/16(840)
D
C
3-27/32(98)
7-9/16(192)
2 Gas Pipe
Unit : inch (mm)
1 Liquid Pipe
6-3/32(155)
6-9/16(167)
3-15/16(100)
5-1/8(130)
70°
3-17/32(90)
3-15/16(100) 3-15/16(100)
3-17/32(90)
13-25/32(350)
[5-29/32([150)
14-[1/8([2.8)
Burring hole
[6-7/8([175)
[4-29/32([125) [3-15/16([100)
6-7/32(158)
120°
120°
Auto vane
31-7/8(810)
33-27/32~35-13/16(860~910)
25/32~1-25/32
25/32~1-25/32
6-1/4(159)
6-1/4(159)
Air intake hole Grille
33-1/16(840)
7-3/4(197)
37-3/8(950)
37-3/8(950)
22-23/32(577)
16-3/16(411)
2(51)
3-1/32(77)
16-3/16(411)
6-11/16(170)
5-1/2(140)
Air intake grille
3-1/32(77)
2(51)
22-23/32(577)
+5
0
+3/16
0
+5
0
+3/16
0
1-1/2(37)
9-3/4(248)1-3/4(45)
14-23/32(374)
5-5/16(135)
11/16 (17 )
2-3/8(60) 11-1/4(286)
1-31/32~2-3/4
4-1/8(105)
11/16 (17 )
1-3/16(30) B
A
7-15/32(190)
OUTLINES AND DIMENSIONS
5
PLFY-P12NAMU-E PLFY-P24NAMU-E
PLFY-P15NAMU-E PLFY-P30NAMU-E
PLFY-P18NAMU-E PLFY-P36NAMU-E
Unit : in(mm)
OC340A--1.qxp 06.7.25 0:39 PM Page 11

12
WIRING DIAGRAM
6
PLFY-P12NAMU-E PLFY-P24NAMU-E
PLFY-P15NAMU-E PLFY-P30NAMU-E
PLFY-P18NAMU-E PLFY-P36NAMU-E
SW2
SW1
SW12 SWC SW14 SW11
SW5
TB5
C
TB15
TB2
5VDC SUPPLY
<fig:w1>
MODELS
PLFY-P12NAMU-E
PLFY-P15NAMU-E
PLFY-P18NAMU-E
PLFY-P24NAMU-E
PLFY-P30NAMU-E
SW2
SW3
SWASWB
SW4
MF
FAN
(WHT)
HUMIDIFIER
CN25(WHT)
HEATER
CN24(YLW)
DAMPER
CN27(RED) VANE
CN6V(GRN) ADDRESS CN81(RED)
Position of TB2, TB5, TB15, C
(For Control Box)
ADDRESS
CN42(RED)
POWER
CND
(RED)
D.U.M
CNP
(BLU)
FUSE
250V
6A
ZNR
MV
MV
MV
MV
X4 X1
DP
LEV DS TH23 TH22 TH21
31
12
21
13
13 13
12
135
123
123
21
13
6
48
5
H2
5
5
5
55151 654321
654321 87654321 4321
4
3
2
1
3
2
1
2
3
48
7
6
5
4
3
2
1
5
9
8
4
7
6
3
2
1
21
12
13
2
1
3
2
1
123456
123456
1234512345678910
12345678910
OFF
ON
OFF
ON
OFF
ON
123456
OFF
ON
PLFY-P36NAMU-E
123456
OFF
ON
SW3
12345678910
12345678910
12345678910
OFF
ON
OFF
ON
123456
OFF
ON
12345678910
OFF
ON
123456
OFF
ON
12345678910
OFF
ON
123456
OFF
ON
12345678910
OFF
ON
OFF
ON
OFF
ON
3ST
DIGIT
208V 230V
2ST
DIGIT 1ST DIGIT
ADDRESS CN43(RED)
ADDRESS CN82(RED)
CONNECTION
No.
PULL BOX
FUSE
(15A)
BREAKER
(15A)
TB2
LED2
LED1
See fig:w1
TO NEXT INDOOR UNIT
POWER SUPPLY
~/N 208-230V 60Hz
TRANS
AC208-230V
CNSK
(RED)
DC13.1V
CN2S
(WHT)
BLU
BLU M1
M2
1
2
ORN
ORN
TB5
CN2D
(WHT)
REMOTE
SWITCH
CN32(WHT)
DRAIN
CN31
(WHT)
GAS
CN29
(BLK)
LIQUID
CN21
(WHT)
INTAKE
CN20
(RED)
LEV
CN60(WHT)
CENTRALLY
CONTROL
CN51(WHT)
REMOTE
INDICATION
CN52(GRN)
M-NET
CN2M
(BLU)
REMOCON
CN3A
(BLU)
TO OUTDOOR UNIT
BC CONTROLLER
REMOTE CONTROLLER
DC24-30V
TO MA-REMOTE
CONTROLLER
DC8.7-13V
TB15
I.B
GRILLE
F.C
A.B
X4
X1
C
RED
RED
RED
WHT
BLK
BRN
ORN
BLU
RED
YLW
WHT
WHT
BLK
WHT
BLK
POWER
CNDK
(RED)
RED
BLU L1 L2
GRGRN/YLW
S(SHIELD)
RED RED
RED RED
RED RED RED
RED
ORN
YLW
WHT
BLU
RED
P.B
21
21
10
00 0
1
2<w2>Use Copper Supply Wire.
<w2>
TERMINAL
BLOCK
SYMBOL
A. B
SW1
SW5
SW11
SW12
SW14
SWA
SWB
SWC
SWITCH
CN24
CN25
CN27
CN32
CN51
CN52
F. C
FUSE
SW2
SW3
SW4
X1
X4
ZNR
MODE SELECTION
VOLTAGE SELECTION
ADDRESS SETTING 1ST DIGIT
ADDRESS SETTING 2ND DIGIT
CONNECTION No.
CEILING HEIGHT SELECTOR
DISCHARGE OUTLET NUMBER SELECTOR
OPTION SELECTOR
CONNECTOR
CIRCUIT BOARD (ADDRESS)
INDOOR CONTROLLER BOARD
[ LEGEND]
I. B
P. B
SWITCH
VARISTOR
INDOOR POWER BOARD
HEATER
HUMIDIFIER
DAMPER
REMOTE SWITCH
CENTRALLY CONTROL
REMOTE INDICATION
CAPACITY CODE
MODE SELECTION
MODEL SELECTION
DRAIN PUMP/DEW PREVENTION HEATER
FAN MOTOR
AUX. RELAY
FAN PHASE CONTROL
FUSE (6A/250V)
NAME SYMBOL
C
DP
DS
H2
LEV
MF
MV
TB2
TB5
TB15
TH21
TH22
TH23
CAPACITOR (FAN MOTOR)
DRAIN WATER LIFTING-UP MACHINE
DRAIN SENSER
DEW PREVENTION HEATER
LINEAR EXPANSION VALVE
FAN MOTOR (WITH INNER THERMOSTAT)
VANE MOTOR
NAME
THERMISTOR
POWER SUPPLY
TRANSMISSION
MA-REMOTE CONTROLLER
ROOM TEMP. DETECTION
( 32 ° F /15kΩ, 77 ° F /5.4kΩ,)
PIPE TEMP. DETECTION/LIQUID
( 32 ° F /15kΩ, 77 ° F /5.4kΩ,)
PIPE TEMP. DETECTION/GAS
( 32 ° F /15kΩ, 77 ° F /5.4kΩ,)
LED1
LED2
Main power supply
Power supply for
MA -Remote controller
Main power supply (Indoor unit:208-230V)
power on ➛lamp is lit
Power supply for MA -Remote controller
on ➛lamp is lit
Notes:
LED on indoor board for service
1. At servicing for outdoor unit, always follow the wiring diagram of outdoor unit.
2. In case of using MA-Remote controller, please connect to TB15.
(Remote controller wire is non-polar.)
3. In case of using M-NET, please connect to TB5. (Transmission line is non-polar.)
4. Symbol [S] of TB5 is the shield wire connection.
5. Symbols used in wiring diagram above are, : terminal block, : connecter.
6. The setting of the SW2 /SW3 dip switches differs in the capacity for the detail,
refer to the fig : W1.
7. 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.
Meaning FunctionMark
OC340A--1.qxp 06.7.25 0:39 PM Page 12

13
REFRIGERANT SYSTEM DIAGRAM7
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
Refrigerant flow in cooling
Refrigerant flow in heating
PLFY-P12NAMU-E PLFY-P24NAMU-E
PLFY-P15NAMU-E PLFY-P30NAMU-E
PLFY-P18NAMU-E PLFY-P36NAMU-E
Gas pipe
Liquid pipe
PLFY-P12/ P15NAMU-E
1/2''
1/4''
PLFY-P18NAMU-E
1/2" / 5/8'' (Compatible)
1/4" / 3/8'' (Compatible)
PLFY-P24/ P30NAMU-E
5/8''
3/8''
PLFY-P36NAMU-E
5/8" / 3/4''(Compatible)
3/8''
Item Service Ref.
OC340A--1.qxp 06.7.25 0:39 PM Page 13

14
MICROPROCESSOR CONTROL8
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
˚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
INDOOR UNIT CONTROL
8-1. COOL OPERATION
<How to operate>
1Press POWER ON/OFF button.
2Press the operation MODE button to display COOL.
3Press 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. 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 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.
1Liquid pipe temp. (TH22) turn 50°F or above.
2The condition of the thermo OFF has become complete
by thermoregulating, etc.
3The operation modes became mode other than COOL.
4The operation stopped.
By the remote controller setting (switch of 4 speeds)
2. Fan
1. Thermoregulating
function
Remarks
Type Fan speed notch
[Low], [Med2], [Med1], [High]
4 speeds type
To be continued on the next page.
OC340A--1.qxp 06.7.25 0:39 PM Page 14

15
→
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 [Med1], [Med2] or [Low] of the fan
speed notch, the vane changes to horizontal position after 1 hour have passed.
4. Vane
(up/ down vane change)
3. Drain pump
Remarks
✻1 Drain sensor
Indoor control
p.c. board
CN31
✻1 "SET FOR 1 HOUR"
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.
OC340A--1.qxp 06.7.25 0:39 PM Page 15

16
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 (TH1).
Dry thermo ON Room temperature ] desired temperature + 2°F
Dry thermo OFF Room temperature [ desired temperature
1-2. Frozen prevention control
No control function
Indoor fan operation controlled 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°FON
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
˚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
8-2. DRY OPERATION
<How to operate>
1Press POWER ON/OFF button.
2Press the operation MODE button to display DRY.
3Press 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.
OC340A--1.qxp 06.7.25 0:39 PM Page 16

17
Control modes Control details
Set by remote controller.
2. Drain pump
Remarks
1. Fan Type Fan speed notch
4 speeds type [Low], [Med2], [Med1], [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:
1ON for 3 minutes after the operation mode is switched from COOL or DRY to
another operation mode (FAN).
2ON for 6 minutes after the drain sensor is determined to be submerged using the
liquid level detection method given below.
3ON 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 2or 3is still being met after the drain pump has been turned ON for 6
minutes, the drain pump is kept ON for a 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:
1Drain pump is ON.
2Indoor piping (liquid piping) temperature – indoor intake temperature [-18°F
3Indoor piping (liquid piping) temperature or indoor intake temperature is at the
short or open level temperature.
4Every hour after the drain pump has been switched from ON to OFF.
Same as the control performed during the COOL operation, but with 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
˚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
8-3. FAN OPERATION
<How to operate>
1Press POWER ON/OFF button.
2Press the operation MODE button to display FAN.
OC340A--1.qxp 06.7.25 0:39 PM Page 17

18
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 (4-speed)
Give priority to under-mentioned controlled mode
2-1. Hot adjuster mode
2-2. Preheating 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 adjuster mode
The fan controller becomes the hot adjuster mode for the
following conditions.
1When starting the HEAT operation
2
When the thermoregulating function changes from OFF to ON.
3When release the HEAT defrosting operation
2. Fan
A: HOT adjuster mode start
B: 5 min have passed since the condition A or the indoor
liquid pipe temperature turned 95°F or more
C: 2 min have passed since the condition A
(Terminating the hot adjuster mode)
ACB
[Extra Low]
[Low]
Set fan speed by the remote controller
Hot adjuster mode ✻1
2-2. Preheating 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.
✻1 This control is same for the model
without auxiliary heater.
✻1 "STAND BY" will be displayed
during the hot adjuster mode.
To be continued on the next page.
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
˚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
8-4. HEAT OPERATION
<How to operate>
1Press POWER ON/OFF button.
2Press the operation MODE button to display HEAT.
3Press 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 from the time the heating operation
starts unit the heated air begins to blow.
OC340A--1.qxp 06.7.25 0:39 PM Page 18

19
→
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
1The 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 adjuster [Extra low] mode
•Heat defrost mode
3. Drain pump
4. Vane control
(Up/ down vane
change)
From the preceding page.
OC340A--1.qxp 06.7.25 0:39 PM Page 19

20
1. Drain pump
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
Control modes Control details
1-1. Drain pump control
The drain pump turns ON for the specified amount of time when any of the following
conditions is met (regardless of whether the compressor is ON or OFF)
1ON for 3 minutes after the operation mode is switched from COOL or DRY to another
operation mode (HEAT mode).
2ON for 6 minutes after the drain sensor is determined to be submerged using the
liquid level detection method given below.
3ON for 6 minutes after indoor piping (liquid piping) temperature – indoor intake
temperature [14°F, AND the drain sensor input is at the short or open level.
(If condition 2or 3is still being met after the drain pump has been turned ON for 6
minutes, the drain pump is kept ON for a further 6 minutes.)
1-2. 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:
1Drain pump is ON.
2Indoor piping (liquid piping) temperature – indoor intake temperature [14°F
(except during defrosting)
3Indoor piping (liquid piping) temperature or indoor intake temperature is at the short
or open level temperature.
4Every hour after the drain pump has been switched from ON to OFF.
Remarks
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
˚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
8-5. AUTO OPERATION [AUTOMATIC COOL/HEAT CHANGE OVER OPERATION]
<How to operate>
1Press POWER ON/OFF button.
2Press the operation MODE button to display AUTO.
3Press 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.
“AUTO” works to change by itself the operation mode either to cooling
or heating to the room temperature.
8-6. WHEN UNIT IS STOPPED CONTROL MODE
OC340A--1.qxp 06.7.25 0:39 PM Page 20