Mitsubishi Electric PLFY-P08NBMU-E2 Operating manual

TECHNICAL & SERVICE MANUAL
Indoor unit
[Model Name] [Service Ref.]
PLFY-P08NBMU-E2
PLFY-P12NBMU-E2
PLFY-P15NBMU-E2
PLFY-P18NBMU-E2
PLFY-P24NBMU-E2
PLFY-P30NBMU-E2
PLFY-P36NBMU-E2
CONTENTS
1. FEATURES............................................. 3
2. PARTS NAMES AND FUNCTIONS........4
3. SPECIFICATIONS................................... 6
4. 4-WAY AIR FLOW SYSTEM.................10
5. OUTLINES AND DIMENSIONS............ 13
6. WIRING DIAGRAM............................... 14
7. REFRIGERANT SYSTEM DIAGRAM
......
15
8. MICROPROCESSOR CONTROL......... 16
9. TROUBLESHOOTING......................... 23
10. DISASSEMBLY PROCEDURE............. 32
PLFY-P08NBMU-E2
PLFY-P12NBMU-E2
PLFY-P15NBMU-E2
PLFY-P18NBMU-E2
PLFY-P24NBMU-E2
PLFY-P30NBMU-E2
PLFY-P36NBMU-E2
Notes:
•Thismanualdescribes
servicedataoftheindoor
unitsonly.
•RoHScompliantproducts
have<G>markonthe
specnameplate.
INDOOR UNIT
Modelname
indication
PARTS CATALOG (OCB579)
R410A
INDOORUNITFORVRFSYSTEM
March 2015
No. OCH579

2
Use the specied refrigerant only
Never use any refrigerant other than that specied.
Doingsomaycauseaburst,anexplosion,orrewhentheunitisbeingused,serviced,ordisposedof.
Correctrefrigerantisspecied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.
OCH579

3
1FEATURES
4. i-see Sensor (OPTIONAL CORNER PANEL)
Thei-seesensorisaradiationtemperaturesensororiginatedfromMitsubishi’snewtechnology.Inordertocreateareally
comfortable space in shops and offices, it is essential to control the temperature near the floor where occupants/visitors
gather.Thei-seesensormeasurestheinfraredraysgeneratedfromthesurroundingwallandfloorsurfaceatanangleof
360°andtheinfraredrayenergyiscomputedtoconvertitintothevalueoftemperature.Inaddition,thefloortemperature
atdistantspots(radiationtemperature)isalsomeasuredtosupplytheoptimumairflowtorealizecomfortwhichwasnever
experiencedinthepast.
Models Cooling capacity / Heating capacity
PLFY-P08NBMU-E2 8,000/9,000BTU/h
PLFY-P12NBMU-E2 12,000/13,500BTU/h
PLFY-P15NBMU-E2 15,000/17,000BTU/h
PLFY-P18NBMU-E2 18,000/20,000BTU/h
PLFY-P24NBMU-E2 24,000/27,000BTU/h
PLFY-P30NBMU-E2 30,000/34,000BTU/h
PLFY-P36NBMU-E2 36,000/40,000BTU/h
Indoor Unit
Operationimageof"WaveAirflow"
HighLow
Automatic air
speed adjustment
Medium 2 Medium 1
1. WIDE AIRFLOW
The new wide shape vane capable of wide angle air supply provides comfort even at the corners of a room regardless
of cooling and heating operation.A reduction in the air speed by 20% compared to the conventional product eliminates
uncomfortabledraftsensationforfriendlyairconditioning.
2. WAVE AIRFLOW SYSTEM (HEATING MODE)
Thewaveairflowsystemhas4vaneswhereeachvanerunsindependently.Repeatingofhorizontalanddownblowswitha
timelagallowstheconditionedwarmairtobedistributedeventoroomcornersthuspreventingunevenroomtemperature
distribution.
3. AUTOMATIC AIR SPEED ADjUSTMENT MODE
Theautomaticairspeedadjustmentmodeisprovidedinadditiontothe4airspeedstagesof"High/Medium1/Medium2/
Low."Airspeedcanbechangedfreelyinaccordancewithadifferencebetweenthesettemperatureandtheroomtempera-
ture.Theautomaticairspeedadjustmentmodepresentsquickcoolingofaroomwiththehighmode,suchasatthestart-
ingupofcoolingoperation,forexample.Aftertheroomtemperatureisstabilized,thelowmodewillbeappliedbyautomatic
switchingtokeepyourcomfort.
OCH579

4
2PARTS NAMES AND FUNCTIONS
Drain pipe
Filter
Vane
Gas pipe
Liquid pipe
Air outlet
i-see sensor
(option)
Air intake
(Intake grille)
Indoor unit
.
Backlit LCD
ON/OFF lamp
ON/OFF button
FAN button
VANE button
Note: To set the functions that are not available on this controller (PAC-YT53CRAU) such as Louver,
use the centralized controller.
The lamp will light up in green when
turned on, and blink during startup
and when an error occurs.
Pressing this button starts and
stops the operation.
TEMP. button
MODE button
Wired remote controller
Note:
The phrase "Wired remote controller" in this manual refers only to the PAC-YT53CRAU.
If you need any information for the other remote controller, please refer to either the installation manual or initial setting manual which are included in
remote controller's box.
OCH579

5
GB
Display section
*2 icon
For City Multi, when an error occurs, power indicator will blink, and unit address (three digits) and error code (four
digits) will blink.
Check the error status, stop the operation, and consult your dealer.
icon appears while the unit is operated in the
energy-save mode
Note: All icons are displayed for explanation
purpose.
icon appears when Operation lock setting is
effective.
icon appears when indoor unit functions are set up.
(Refer to the Installation Manual.)
Fan speed icon
Vane icon
icon appears when the power is on.
Indoortemperature
Operation modes
CENTRAL icon *1
CHECK icon *2
Preset temperature *3
*1 icon
Appears when one of the following local operations is prohibited: ON/OFF; operation mode; preset temperature;
fan speed; vane.
CENTRAL
*3 Preset temperature
* Centigrade or Fahrenheit is selectable. Refer to the Installation Manual for details.
In COOL, DRYING, HEAT, or
AUTO (single set point) modes
In AUTO (dual set point) or
SETBACK modes
Room Setto
AUTO COOL HEATFAN
DRYINGVENTI.SETBACK
Preset
temperature
Room Setto
AUTO COOLHEATFAN
DRYINGVENTI.SETBACK
Heating preset
temperature
Cooling preset
temperature
OCH579

6
3-1. SPECIFICATIONS
3SPECIFICATIONS
ServiceRef. PLFY-P08NBMU-E2 PLFY-P12NBMU-E2 PLFY-P15NBMU-E2 PLFY-P18NBMU-E2
Powersource 1-Phase208–230V,60HZ
Coolingcapacity
( N o m i n a l ) 
*1
*1
BTU/h 8,000
2.3
12,000
3.5
15,000
4.4
18,000
5.3
kW
Powerinput kW 0.03 0.03 0.03 0.04
Currentinput A 0.31 0.31 0.31 0.33
Heatingcapacity
(Nominal)
*2
*2
BTU/h 9,000
2.6
13,500
4.0
17,000
5.0
20,000
5.9
kcal/h
Powerinput kW 0.02 0.02 0.02 0.03
Currentinput A 0.24 0.24 0.24 0.26
Externalnish Galvanizedsteelsheet
ExternaldimensionH×W×D in 10-3/16×33-3/32×33-3/32
258×840×840
10-3/16×33-3/32×33-3/32
258×840×840
10-3/16×33-3/32×33-3/32
258×840×840
10-3/16×33-3/32×33-3/32
258×840×840
mm
Netweight lb[kg] 51[23] 51[23] 51[23] 51[23]
Decorationpanel Model PLP-40BAU PLP-40BAU PLP-40BAU PLP-40BAU
Externalnish MUNSELL(6.4Y8.9/0.4)
Dimension
H×W×D
in 1-3/8×37-13/32×37-13/32
35×950×950
1-3/8×37-13/32×37-13/32
35×950×950
1-3/8×37-13/32×37-13/32
35×950×950
1-3/8×37-13/32×37-13/32
35×950×950
mm
Netweight lb[kg] 13[6] 13[6] 13[6] 13[6]
Heatexchanger Crossn
FAN Type×Quantity Turbofan×1 Turbofan×1 Turbofan×1 Turbofan×1
Externalstatic
press.
in.WG 0.000(208V)
0
0.000(208V)
0
0.000(208V)
0
0.000(208V)
0
Pa
in.WG 0.000(208V)
0
0.000(230V)
0
0.000(230V)
0
0.000(230V)
0
Pa
Motortype DCmotor
Motoroutput kW 0.050 0.050 0.050 0.050
Drivingmechanism Directdrive
Airowrate cfm 494-530-548-565
14.0-15.0-15.5-16.0
233-250-258-267
494-530-548-565
14.0-15.0-15.5-16.0
233-250-258-267
494-530-548-565
14.0-15.0-15.5-16.0
233-250-258-267
494-530-565-636
14.0-15.0-16.0-18.0
233-250-267-300
m³/min
L/s
Noiselevel(Low-Mid2-Mid1-High)
(measureonanechoicroom)
dB<A> 27-29-30-31(208–230V)
―
―
27-29-30-31(208–230V)
―
―
28-29-30-31(208–230V)
―
―
28-30-31-32(208–230V)
―
―
dB<A>
dB<A>
Insulationmaterial PS
Airlter PPhoneycomb(longlifelter,anti-bacterialtype)
Protectiondevice Fuse
Refrigerantcontroldevice LEV
Connectableoutdoorunit R410,CITYMULTI
Diameterofrefrigerant
pipe(O.D.)
Liquid in[mm] 1/4[6.35]Flare 1/4[6.35]Flare 1/4[6.35]Flare 1/4[6.35]Flare
Gas in[mm] 1/2[12.7]Flare 1/2[12.7]Flare 1/2[12.7]Flare 1/2[12.7]Flare
Fielddrainpipesize in[mm] O.D1-1/4[32] O.D1-1/4[32] O.D1-1/4[32] O.D1-1/4[32]
Standardattachment Document,accessory InstallationManual,InstructionBook
Optionalparts Airoutletshutterplate PAC-SH51SP-E PAC-SH51SP-E PAC-SH51SP-E PAC-SH51SP-E
Highefciencylterelement PAC-SH59KF-E PAC-SH59KF-E PAC-SH59KF-E PAC-SH59KF-E
Multi-functioncasement PAC-SH53TM-E PAC-SH53TM-E PAC-SH53TM-E PAC-SH53TM-E
Remarks Installation
Detailsonfoundationwork,ductwork,insulationwork,electricalwiring,powersourceswitch,andotheritems
shallbereferredtotheInstallationManual.
*1Nominalcoolingconditions*2Nominalheatingconditions
Indoor:80°FD.B./67°FW.B70°FD.B.
[26.7°CD.B./19.4°CW.B][21.1°CD.B.]
Outdoor:95°FD.B.47°FD.B./43°FW.B
[35°CD.B.][8.3°CD.B./6.1°CW.B]
Pipelength:25ft[7.6m]25ft[7.6m]
Leveldifference:0ft[0m]0ft[0m]

Note:Duetocontinuingimprovement,abovespecicationmaybesubjecttochangewithoutnotice.
Unitconverter
kcal/h=kW×860
BTU/h=kW×3,412
cfm=m3/minx35.31
lb=kg/0.4536
Abovespecicationdatais
subjecttoroundingvariation
.
OCH579

7
ServiceRef. PLFY-P24NBMU-E2 PLFY-P30NBMU-E2 PLFY-P36NBMU-E2
Powersource 1-Phase208–230V,60HZ
Coolingcapacity
( N o m i n a l ) 
*1
*1
BTU/h 24,000
7.0
30,000
8.8
36,000
10.5
kW
Powerinput kW 0.05 0.05 0.09
Currentinput A 0.47 0.50 0.87
Heatingcapacity
(Nominal)
*2
*2
BTU/h 27,000
7.9
34,000
10.0
40,000
11.7
kcal/h
Powerinput kW 0.04 0.04 0.08
Currentinput A 0.40 0.43 0.80
Externalnish Galvanizedsteelsheet
ExternaldimensionH×W×D in 11-3/4×33-3/32×33-3/32
298×840×840
11-3/4×33-3/32×33-3/32
298×840×840
11-3/4×33-3/32×33-3/32
298×840×840
mm
Netweight lb[kg] 60[27] 60[27] 60[27]
Decorationpanel Model PLP-40BAU PLP-40BAU PLP-40BAU
Externalnish MUNSELL(6.4Y8.9/0.4)
Dimension
H×W×D
in 1-3/8×37-13/32×37-13/32
35×950×950
1-3/8×37-13/32×37-13/32
35×950×950
1-3/8×37-13/32×37-13/32
35×950×950
mm
Netweight lb[kg] 13[6] 13[6] 13[6]
Heatexchanger Crossn
FAN Type×Quantity Turbofan×1 Turbofan×1 Turbofan×1
Externalstatic
press.
in.WG 0.000(208V)
0
0.000(208V)
0
0.000(208V)
0
Pa
in.WG 0.000(230V)
0
0.000(230V)
0
0.000(230V)
0
Pa
Motortype DCmotor
Motoroutput kW 0.050 0.050 0.0120
Drivingmechanism Directdrive
Airowrate cfm 565-636-706-777
16.0-18.0-20.0-22.0
267-300-333-367
565-636-706-777
16.0-18.0-21.0-23.0
267-300-333-367
777-883-989-1,059
22.0-25.0-28.0-30.0
367-417-467-500
m³/min
L/s
Noiselevel(Low-Mid2-Mid1-High)
(measureonanechoicroom)
dB<A> 28-31-34-37(208–230V)
―
―
28-32-35-37(208–230V)
―
―
35-38-41-43(208–230V)
―
―
dB<A>
dB<A>
Insulationmaterial PS
Airlter PPhoneycomb(longlifelter,anti-bacterialtype)
Protectiondevice Fuse
Refrigerantcontroldevice LEV
Connectableoutdoorunit R410,CITYMULTI
Diameterofrefrigerant
pipe(O.D.)
Liquid in[mm] 3/8[9.52]Flare 3/8[9.52]Flare 3/8[9.52]Flare
Gas in[mm] 5/8[15.88]Flare 5/8[15.88]Flare 5/8[15.88]Flare
Fielddrainpipesize in[mm] O.D1-1/4[32] O.D1-1/4[32] O.D1-1/4[32]
Standardattachment Document,accessory InstallationManual,InstructionBook
Optionalparts Airoutletshutterplate PAC-SH51SP-E PAC-SH51SP-E PAC-SH51SP-E
Highefciencylterelement PAC-SH59KF-E PAC-SH59KF-E PAC-SH59KF-E
Multi-functioncasement PAC-SH53TM-E PAC-SH53TM-E PAC-SH53TM-E
Remarks Installation
Detailsonfoundationwork,ductwork,insulationwork,electricalwiring,powersourceswitch,andotheritems
shallbereferredtotheInstallationManual.
*1Nominalcoolingconditions*2Nominalheatingconditions
Indoor:80°FD.B./67°FW.B70°FD.B.
[26.7°CD.B./19.4°CW.B][21.1°CD.B.]
Outdoor:95°FD.B.47°FD.B./43°FW.B
[35°CD.B.][8.3°CD.B./6.1°CW.B]
Pipelength:25ft[7.6m]25ft[7.6m]
Leveldifference:0ft[0m]0ft[0m]

Note:Duetocontinuingimprovement,abovespecicationmaybesubjecttochangewithoutnotice.
Unitconverter
kcal/h=kW×860
BTU/h=kW×3,412
cfm=m3/minx35.31
lb=kg/0.4536
Abovespecicationdatais
subjecttoroundingvariation
.
OCH579

8
3-2. SOUND LEVEL
* Measured in anechoic room.
PLFY-P-NBMU-E
PLFY-P12NBMU-E2
PLFY-P15NBMU-E2
PLFY-P18NBMU-E2
PLFY-P24NBMU-E2
PLFY-P30NBMU-E2
PLFY-P36NBMU-E2
27-28-29-31
27-28-30-31
28-29-30-32
28-30-32-34
30-32-35-37
35-38-41-43
Sound level dB (A)
Sound level at anechoic room : Low-Mid2-Mid1-High
5 ft (1.5m)
Measurement location
PLFY-P08NBMU-E2
PLFY-P08NBMU-E2
PLFY-P12NBMU-E2
External static pressure: 0Pa
Power source: 208/230 V, 60 Hz Power source: 208/230 V, 60 Hz Power source: 208/230 V, 60 Hz
PLFY-P15NBMU-E2
External static pressure: 0Pa
PLFY-P18NBMU-E2
External static pressure: 0Pa
PLFY-P30NBMU-E2
External static pressure: 0Pa
Power source: 208/230 V, 60 Hz
Power source: 208/230 V, 60 Hz Power source: 208/230 V, 60 Hz
PLFY-P24NBMU-E2
External static pressure: 0Pa
PLFY-P36NBMU-E2
External static pressure: 0Pa
Middle2 60Hz
High 60Hz
Low 60Hz
Middle1 60Hz
Middle2 60Hz
High 60Hz
Low 60Hz
Middle1 60Hz
Middle2 60Hz
High 60Hz
Low 60Hz
Middle1 60Hz
Middle2 60Hz
High 60Hz
Low 60Hz
Middle1 60Hz
Middle2 60Hz
High 60Hz
Low 60Hz
Middle1 60Hz
Middle2 60Hz
High 60Hz
Low 60Hz
Middle1 60Hz
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
NC-60
NC-50
NC-40
NC-20
NC-30
Octave band pressure level (dB) 0dB=20Pa
Octave band center frequencies (Hz)
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
NC-60
NC-50
NC-40
NC-20
NC-30
Octave band pressure level (dB) 0dB=20Pa
Octave band center frequencies (Hz)
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
NC-60
NC-50
NC-40
NC-20
NC-30
Octave band pressure level (dB) 0dB=20Pa
Octave band center frequencies (Hz)
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
NC-60
NC-50
NC-40
NC-20
NC-30
Octave band pressure level (dB) 0dB=20Pa
Octave band center frequencies (Hz)
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
NC-60
NC-50
NC-40
NC-20
NC-30
Octave band pressure level (dB) 0dB=20Pa
Octave band center frequencies (Hz)
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
NC-60
NC-50
NC-40
NC-20
NC-30
Octave band pressure level (dB) 0dB=20Pa
Octave band center frequencies (Hz)
Approximate minimum
audible limit on
continuous noise
Approximate minimum
audible limit on
continuous noise
Approximate minimum
audible limit on
continuous noise
Approximate minimum
audible limit on
continuous noise
Approximate minimum
audible limit on
continuous noise
Approximate minimum
audible limit on
continuous noise
3-3. NC CURVES
OCH579

9
3-4. ELECTRICAL PARTS SPECIFICATIONS
Parts name
Service Ref.
Symbol
TH21
TH22
TH23
FUSE
MF
MV
DP
FS
LEV
TB2
TB5
TB15
Resistance 30_F/15.8 k", 50_F/9.6 k", 70_F/6.0 k", 80_F/4.8 k", 90_F/3.9 k", 100_F/3.2 k"
Resistance 30_F/15.8 k", 50_F/9.6 k", 70_F/6.0 k", 80_F/4.8 k", 90_F/3.9 k", 100_F/3.2 k"
Resistance 30_F/15.8 k", 50_F/9.6 k", 70_F/6.0 k", 80_F/4.8 k", 90_F/3.9 k", 100_F/3.2 k"
250 V, 6.3A
(L1, L2, GR) 330 V, 30 A
(M1, M2, S) 250 V, 20 A
(1, 2) 250 V, 10 A
Liquid pipe thermistor
Gas pipe thermistor
Vane motor
Drain pump
Drain float switch
Linear expansion valve
PLFY-P08NBMU-E2
PLFY-P12NBMU-E2 PLFY-P18NBMU-E2PLFY-P15NBMU-E2 PLFY-P24NBMU-E2 PLFY-P30NBMU-E2 PLFY-P36NBMU-E2
Room temperature
thermistor
Fuse
(Indoor controller board)
Fan motor
Power supply terminal
block
Transmission terminal
block
MA remote controller
terminal block
8-pole OUTPUT 50W 8-pole OUTPUT,
120W
MSBPC20M04
12 V DC, 300
" /phase
PLD-12230ME-1
INPUT 12/10.8W 24R/Hr
Open/short detection
12 V DC Stepping motor drive port dimension [3.2 (0–2000pulse)
EDM-40YGME
12 V DC Stepping motor drive port
dimension [
5.2 (0–2000pulse)
EDM-80YGME
OCH579

10
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remotecontrollertotheappropriatesettings,youcanadjusttheairflowandspeed.Selectthesettings
fromTable1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
Note: For 3 and 2-direction settings, please use the air outlet shutter plate (option).
Pattern 1 Initial setting Pattern 4 One air outlet
fully closed
Pattern 6 2 air outlet
fully closed
1
Silent
8.2 ft [2.5 m]
8.9 ft [2.7 m]
9.8 ft [3.0 m]
2
Standard
8.9 ft [2.7 m]
9.8 ft [3.0 m]
10.8 ft [3.3 m]
3
High ceiling
11.5 ft [3.5 m]
11.5 ft [3.5 m]
11.5 ft [3.5 m]
4 direction
3 direction
2 direction
SWA
SWB
PLFY-P08/12/15/18/24/30NBMU-E2
PLFY-P36NBMU-E2
4
3
2
1
Silent
2
Standard
10.5ft [3.2m]
11.8ft [3.6m]
13.1ft [4.0m]
3
High ceiling
14.8ft [4.5m]
14.8ft [4.5m]
14.8ft [4.5m]
4 direction
3 direction
2 direction
SWA
SWB
4
3
2
8.9 ft [2.7 m]
9.8 ft [3.0 m]
10.8 ft [3.3 m]
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addressboardtotheappropriatesetting.
 •Correspondenceofceilingheightstonumbersofairoutlets
SW14
SW11
SW12
12345678910
ON
OFF
SW1
SWC
CN82
CN43
3
2
SWA
1
ADDRESS
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
(10s DIGIT) (1s DIGIT)
. /.
(BRANCH No.)
2
3
SWB
4
OCH579

11
CN51
Multiple remote
controller adapter
PAC-SA88HA-E
Indoor controller board
Distance between indoor
controller board and relay
must be within 33 ft [10 m].
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
controller
board Red
Brown
1
~
CN51
MB
4-3. OPERATION IN CONjUNCTION WITH
DUCT FAN (Booster fan)
•Whenevertheindoorunitisoperating,theductfan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12VDCrelay
betweentheYellowandOrangeconnectorlines.
MB:Electromagneticswitchpowerrelayforductfan.
X:Auxiliaryrelay(For12VDC,coilrating:1.0Wor
smaller)
Branch duct hole
A
A
A
14-[1/8 ([2.8) burring hole
Indoor unit
[5-29/32 ([150) cut out hole
Fresh air intake hole
[6-7/8 ([175) burring hole pitch
Drain pipe
Fresh air intake hole diagram
Unit : in (mm)
Refrigerant pipe
3-[1/8 ([2.8) burring hole
Branch duct hole diagram
(view from either side)
[4-29/32 ([125) burring hole pitch
[3-15/16 ([100) cut out hole
Ceiling
6-7/32
(*158)
120
120
13-25/32 (350)
3-17/32
(90)
3-15/16
(100)
3-15/16
(90)
3-17/32
(90)
70
3-15/16 (100) 5-1/8 (130)
*6-3/32 (155)
*6-9/16 (167)
4-2. BRANCH DUCT HOLE AND FRESH AIR INTAkE HOLE
Atthetimeofinstallation,usetheductholes(cutout)locatedatthepositionsshowninfollowingdiagram,asandwhenrequired.
•Afreshairintakeholefortheoptionalmultifunctioncasementcanalsobemade.
Note:
Thefiguresmarkedwith*inthedrawingbelowrepresentthedimensionsofthemainunitexcludingthoseoftheoptionalmulti
functioncasement.
Wheninstallingtheoptionalmultifunctioncasement,add5-5/16”(135mm)tothedimensionsmarkedonthefigure.
Wheninstallingthebranchducts,besuretoinsulateadequately.
Otherwise,condensationanddrippingmayoccur.
OCH579

12
2 - inlet
1 - inlet
2 - inlet
1 - inlet
2 - inlet
1 - inlet
-200(-80)
-150(-60)
-100(-40)
-50(-20)
0
50(20)
0 1 2
50 100 150 200
[CFM]
3456
[CMM]
2 - inlet
1 - inlet
Air flow rate
Static pressure [Pa(in.W.G.o10-2)]
-200(-80)
-150(-60)
-100(-40)
-50(-20)
0
50(20)
0 1 2
50 100 150 200
[CFM]
3456
[CMM]
Static pressure [Pa(in.W.G.o10-2)]
-200(-80)
-150(-60)
-100(-40)
-50(-20)
0
50(20)
0 1 2
50 100 150 200
[CFM]
3 4 5 6 [CMM]
Air flow rate
Static pressure [Pa(in.W.G.o10-2)]
-200(-80)
-150(-60)
-100(-40)
-50(-20)
0
50(20)
0 2
50 100 150 200 250
[CFM]
4 8 [CMM] 6
Air flow rate
Static pressure [Pa(in.W.G.o10-2)]
-200(-80)
-150(-60)
-100(-40)
-50(-20)
0 0
50(20)
0 2
50 100 150 200 250
[CFM]
4 8 [CMM] 6
Air flow rate
Static pressure [Pa(in.W.G.o10-2)]
-200(-80)
-150(-60)
-100(-40)
-50(-20)
50(20)
0 2
50 100 150 200 250
[CFM]
4 8 [CMM] 6
Air flow rate
Static pressure [Pa(in.W.G.o10-2)]
2PLFY-P24/30/36NBMU-E2
Multifunction casement + Standard filter Multifunction casement + High efficiency filter
Taking air into the unit
Taking air into the unit
4-4. FRESH AIR INTAkE AMOUNT & STATIC PRESSURE CHARACTERISTICS
1PLFY-P08/12/18NBMU-E2
Multifunction casement + High efficiency filter Multifunction casement + Standard filter
Q
0
BA
C
1Curve in the
graphs.
Duct characteristics
at site
Q
A
E C
2
Q
Qa
A D
3
Q…Designedamountoffreshairintake
<CMM(CFM)>
A…Static pressure loss of fresh air
intake duct system with air flow
amountQ<Pa(in.W.G.o10-2)>
B…Forced static pressure at air condi-
tionerinletwithairflowamountQ
<Pa(in.W.G.o10-2)>
C…Staticpressureofboosterfanwithair
flowamountQ<Pa(in.W.G.o10-2)>
D…Staticpressurelossincreaseamount
offreshairintakeductsystemforair
flowamountQ<Pa(in.W.G.o10-2)>
E…Staticpressureofindoorunitwithair
flowamountQ<Pa(in.W.G.o10-2)>
Qa…Estimated amount of fresh air
intakewithoutD<CMM(CFM)>
Howtoreadcurves
OCH579

13
5OUTLINES AND DIMENSIONS
14-27/3211-3/16
2-3/8
+5 0
+35 -5
(187.5) (160)
(160)
(7.5)
(950)
(500)
Keep 25/64(10) to 19/32(15)
between unit ceiling
and ceiling slab.
Note:
1. Please choose the Grille from a standard grille.
2. As for drain pipe, please use VP-25 (O.D. [1-1/4([32) PVC TUBE.)
Drain pump is included.
Max. lifting height is 70-7/18 (850mm) from the ceiling.
3. As for suspension bolt, please use M10 or W3/8. (Procured at local site)
4. Electrical box may be removed for the service purpose.
Make sure to slack the electrical wire little bit for control/power wires connection.
5. The height of the indoor unit is able to be adjusted with the grille attached.
6. For the installation of the optional high efficiency filter or optional multi-functional
casement.
1) Add 5-5/16"(135mm) to the dimensions Wmarked on the figure.
2) The optional high efficiency filter becomes optional multi-functional casement
and concomitant use.
7. When installing the branch ducts, be sure to insulate adequately.
Otherwise condensation and dripping may occur.
(It becomes the cause of dew drops/water dew.)
8. As for necessary installation/service space, please refer to the left figure.
Grille
Indoor unit
Ceiling
Floor
Min.94-1/2(2400)
from floor
Min.19-11/16(500)
Entire
periphery
(36)
(83)
(36) (83)
(500)
(950)
(597)
(597)
(w158)
ø6-7/8(ø175) (350)
(130)
(100)
(90)
(100)
(90)
(100)
(77)
3-1/32
(85)
3-11/32
(298)
11-3/4
11-1/16
(281)
(74)(80)(258)(241)
2-29/32
3-5/32
10-3/16
PLFY-P36NBMU-E2
PLFY-P24NBMU-E2
PLFY-P30NBMU-E2
(35)
(17 )
+3/16 0
(190)
(156)
(50~70)
(140)
(170)
(377)
(284)
(60)
(24)
(840)
(160)
(20~45)
to 1-25/32
(620)
(605 )
-3/16 +1-3/8
(90)
(150)
(160)
(7.5)
(20~45)
1-25/32
Corner pocket
In case of wireless remote controller
In case of standard grille
9-1/2
Drain hole
Drain pump clean hole
and Drain emergency
drainage hole
For MA-Remote controller
terminal block
Emergency operation switch <Cooling>
and Emergency Up/Down switch <Up>
Emergency operation switch <Heating>
and Emergency Up/Down switch <Down>
Ceiling
Cut out hole
Burring hole pitch
3-ø1/8(3-ø2.8)
Burring hole
Detail drawing of fresh air intake hole
Burring hole
14-ø1/8(14-ø2.8)
Cut out hole
Burring hole pitch
Cut out hole
Detail connecting of branch duct (Both aspects)
DCBA
Refrigerant pipe ···ø15.88
Flared connection ···5/8F
Refrigerant pipe ···ø12.7
Flared connection ···1/2F
Refrigerant pipe···ø6.35
Flared connection···1/4F
Refrigerant pipe···ø9.52
Flared connection···3/8F
Service ref.
PLFY-P08NBMU-E2
PLFY-P12NBMU-E2
PLFY-P15NBMU-E2
PLFY-P18NBMU-E2
Suspension bolt
lower edge
Vane motor
Air intake
grille
Air outlet hole
Air outlet hole
Auto vane
(Air outlet)
Air intake hole
Air intake hole
Grille
Ceiling
)(
Connected the attached
flexible pipe or socket.
Drain pipe
connected to VP-25
Suspension bolt
M10 or W3/8
Branch duct hole
Fresh air
intake hole
Branch
duct hole
Ceiling hole
Suspension bolt pitch
Suspension bolt pitch
Ceiling hole
(5/16)(5/16) 23-13/16
24-13/32
DEFROST/STAND BY lamp
Receiver
Operation lamp
6-5/16
6-16/5
1
2
3-15/16
5-1/8
13-25/32
3-17/32
3-15/16 3-15/16
3-17/32
70
w6-9/16(167)
w6-3/32(155)
ø5-29/32(ø150)
19-11/16
19-11/16
23-1/2
M
M
M
M
3-17/64
1-27/64
37-3/8
3-17/64
1-27/64
37-3/8 23-1/2
1-31/32 to 2-3/4
w5-1/2
w6-11/16
1-3/8
11/16
w4-1/8(105)
w6-9/64
w7-15/32
A
wB
6-5/16
33-1/16(840)
5-29/32
3-17/32
C
D
33-1/16
7-3/8
25/32~1-25/32(20~45) 33-27/32 to 35-13/16(860~910) 25/32 to 1-25/32(20~45)
31-7/8(810)
25/32 to
33-27/32 to 35-13/16(860~910)25/32
15/16
6-5/16
Indoor unit/Outdoor unit
connecting terminal block
ø4-29/32(ø125)
ø3-15/16(ø100)
6-7/32
120°
120°
1 2
For wiring replacement kit
terminal block
In case of Auto grille
PLFY-P08NBMU-E2 PLFY-P12NBMU-E2 PLFY-P15NBMU-E2 PLFY-P18NBMU-E2
PLFY-P24NBMU-E2 PLFY-P30NBMU-E2 PLFY-P36NBMU-E2
Unit: in (mm)
OCH579

14
WIRING DIAGRAM
6
CN27
CN32
CN51
CN52
SW2
SW3
SW4
SWE
FUSE
X1
LED1
LED2
MF
MV
DP
FS
TB2
TB5
TB15
TH21
TH22
TH23
LEV
SW1
SW11
SW12
SW14
SWA
SWB
SWC
W.B
RU
BZ
LED1
LED2
SW1
SW2
POWER SUPPLY
TRANSMISSION
MA-REMOTE CONTROLLER
ROOM TEMP. DETECTION
PIPE TEMP. DETECTION / LIQUID
PIPE TEMP. DETECTION / GAS
FAN MOTOR
VANE MOTOR
DRAIN PUMP
DRAIN FLOAT SWITCH
TERMINAL
BLOCK
THERMISTOR
LINEAR EXPANSION VALVE
I. B
Mark
LED1
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
LED2
Meaning Function
INDOOR CONTROLLER BOARD
CONNECTOR
DAMPER
EXTERNAL HEATER
REMOTE SWITCH
CENTRALLY CONTROL
REMOTE INDICATION
CAPACITY CODE
MODE SELECTION
MODEL SELECTION
DRAIN PUMP (TEST MODE)
SWITCH
FUSE (T6.3AL250V)
AUX. RELAY
POWER SUPPLY (I. B)
POWER SUPPLY (I. B)
DRAIN PUMP
SYMBOL
A. B
OPTION PART
ADDRESS BOARD
SWITCH
MODE SELECTION
ADDRESS SETTING 1s DIGIT
ADDRESS SETTING 10ths DIGIT
BRANCH NO.
CEILING HEIGHT SELECTOR
DISCHARGE OUTLET NUMBER
SELECTOR
OPTION SELECTOR
PCB FOR WIRELESS REMOTE CONTROLLER
RECEVING UNIT
BUZZER
LED (OPERATION INDICATION : GREEN)
LED (PREPARATION FOR HEATING : ORANGE)
EMERGENCY OPERATION (HEAT / DOWN)
EMERGENCY OPERATION (COOL / UP)
SYMBOLNAME NAME
LED on indoor board for service
CN24
SYMBOL NAME
MT I-SEE SENSOR MOTOR
CN105
IT TERMINAL
2
1
1 9
A.B
(RED)
ADDRESS
CN43
ADDRESS
CN81
(RED)
LED2
ADDRESS
CN42
(RED)
(RED)
ADDRESS
CN82
VANE
CNV
(WHT)
SWBSWA
SW1
MV MV MV MV
CN32
(WHT) SW3 SW4
SWE
SW2
ON
OFF
ON
OFF ON OFF
ONOFF
9
6
54
8
5 5 5 5
4
3
2
1
12345678910
12345678910 12345612345
GRILLE 2
3
4
M-NET
CN2M
(BLU)
CND
(BLK)
CNAC
(WHT)
D.U.M
CNP
(BLU)
FAN
CNMF
(WHT)
INTAKE
CN20
(RED)
CN25
(WHT)
FLOAT SW
CN4F
(WHT)
WIRELESS
CN90
(WHT)
LEV
CN60
(WHT)
WHT
YLW
ORN
BLU
RED BRN
MA REMOCON
CN3A
(BLU)
I-SEE SENSOR
CN4Y
(WHT)
I-SEE SENSOR MOTOR
CN6Y
(RED)
LIQUID/GAS
CN44
(WHT)
CN41
(WHT)
CN51
(WHT)
CN52
(GRN)
CN3G
(BLK)
TH21TH23TH22 FS
CN27
(RED)
LED1
X1
FUSE
TB5
(SHIELD)
RED
BLU
GRN/YLW
TO OUTDOOR UNIT
BC CONTROLLER
REMOTE CONTROLLER
24-30V DC
TO NEXT
INDOOR UNIT
PULL BOX
FUSE(16A)
BREAKER
(16A)
I.B
BZ
LEV
MT
LED2
SW1
CNB
TO MA-REMOTE
CONTROLLER
8.7-13V DC
I-SEE SENSOR CORNER PANEL
(OPTION PART)
(OPTION PART)
I-SEE
SENSOR
TB15
SW2 LED1
RU
W.B
Pair No.
J42 J41
2
2
1 4
1
2
1
4
1
8
1 51 5
1 6
M
M
1 4
1 6
1 3
1 3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
P12
MODELS MODELS
SW2 SW2
P15
P18
P24
P30
P36
ON
OFF
123456
P08
1 4 1 4
21
CN24
(YLW)
21
31
2121 7 4 11313
MF
MS M
2 1
1 3 5
L1
L2
GR
M1
M2
S
M M M M
1 41 8
CN105
(RED)
1 5
DP
is the switch position.
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
10ths
DIGIT 1s DIGIT BRANCH No.
SWC
SW12 SW11 SW14
PLFY-P08NBMU-E2 PLFY-P12NBMU-E2 PLFY-P15NBMU-E2 PLFY-P18NBMU-E2
PLFY-P24NBMU-E2 PLFY-P30NBMU-E2 PLFY-P36NBMU-E2
OCH579

15
7REFRIGERANT SYSTEM DIAGRAM
Refrigerant flow in cooling
Refrigerant flow in heating
Strainer (#100mesh)
Strainer (#100mesh)
Strainer1 (#50mesh)
Strainer2 (#100mesh)
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
PLFY-P08/12/15NBMU-E2
[1/2 [12.7]
[1/4 [6.35]
PLFY-P18NBMU-E2
[1/2 [12.7]
[
5/8 [15.88]
[1/4 [6.35]
[3/8 [9.52]
PLFY-P24/30NBMU-E2
[
5/8 [15.88]
[3/8 [9.52]
PLFY-P36NBMU-E2
[ 5/8 [15.88]
[3/4 [19.05]
[3/8 [9.52]
Item
Model
Unit: in [mm]
PLFY-P08NBMU-E2 PLFY-P12NBMU-E2 PLFY-P15NBMU-E2 PLFY-P18NBMU-E2
PLFY-P24NBMU-E2 PLFY-P30NBMU-E2 PLFY-P36NBMU-E2
OCH579

16
MICROPROCESSOR CONTROL8
.
INDOOR UNIT CONTROL
8-1. COOL OPERATION
<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2°Fwhentheorbuttonis
pressedonetime.Cooling67to87°F
Control modes Control details
1-1. Determinating thermostatic control function
(Function to prevent restarting for 3 minutes)
• Room temperature ]desired temperature + 2°F
···Thermo-ON
• Room temperature [desired temperature ··· Ther mo-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.
1 Liquid pipe temp. (TH22) turns 50°F or above.
2 The condition of the thermo OFF has become complete
by thermostat, etc.
3 The operation modes became mode other than COOL.
4The operation stopped.
By the remote controller setting (switch of 4 speeds+Auto)
When [Auto] is set, fan speed is changed depending on the value of:
Room temperature - Desired temperature
2. Fan
1. Thermostatic
control function
Remarks
Type Fan speed notch
[Low], [Med2], [Med1], [High], [Auto]
4 speeds + Auto type
Continue to the next page
OCH579

17
→
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.
Float switch control
• Float switch control judges whether the sensor is in the air or in the water by
turning the float switch ON/OFF.
In the water: Detected that the float switch is ON for 15 seconds.
In the air : Detected that the float switch is OFF for 15 seconds.
(1) Initial setting: Start at COOL mode and horizontal vane.
(2) Vane position:
Horizontal →Downward A →Downward B →Downward C→Downward D→Swing→Auto
(3) Restriction of the downward vane setting
When setting the downward vane A, B, C or D in [Med1], [Med2] or [Low] of the
fan speed notch, the vane changes to horizontal position after 1 hour has passed.
4. Vane
(up/down vane change)
3. Drain pump
Remarks
· "ONLY 1 Hr"
appears on the
wired remote
controller.
ON
OFF
15 s 15 s 15 s 1 min 30 s 1 min 30 s
Float SW
In the water In the air In the water Error
postponement
Drain pump
abnormal
OCH579

18
Control modes Control details
1-1. Determinating thermostatic control function
(Function to prevent restarting for 3 minutes)
Setting the Dry thermo by the thermostat signal and the room
temperature (TH21).
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. Thermostatic
control function
Remarks
Room
temperature
3 minutes passed since starting operation
Thermostat 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
9 3
73
53
3 3
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
4. Vane
(up/down vane change)
Same control as COOL operation
Same control as COOL operation
.
8-2. 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2°Fwhentheorbuttonis
pressedonetime.Dry67to87°F
OCH579

19
Control modes Control details
Set by remote controller.
When [Auto] is set, fan speed becomes [Low].
2. Drain pump
Remarks
1. Fan
Type Fan speed notch
4 speeds + Auto type [Low], [Med2], [Med1], [High], [Auto]
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 float switch is submerged in the water when the
float switch control judges the sensor is in the water.
2-2. Float switch control
• Float switch control judges whether the sensor is in the air or in the water by
turning the float switch ON/OFF.
In the water : Detected that the float switch is ON for 15 seconds.
In the air : Detected that the float switch is OFF for 15 seconds.
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
8-3. FAN OPERATION
<How to operate>
1 PressPOWERON/OFFbutton.
2 PresstheoperationMODEbuttontodisplayFAN.
.
OCH579

20
Control modes Control details
1-1. Determinating thermostatic control function
(Function to prevent restarting for 3 minutes)
•
Room temperature [ desired temperature −2°F ···Thermo-ON
•
Room temperature ] desired temperature ···Thermo-OFF
1. Thermostatic
control function
Remarks
2-1. Hot adjust mode
The fan controller becomes the hot adjuster mode for the following conditions.
1When starting the HEAT operation
2
When the thermostat function changes from OFF to ON.
3When 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 A. (Terminating the hot adjust mode)
A CB
[Extra Low]
[Low]
Set fan speed by the remote controller
Hot adjust mode *1
*1 "STAND BY"
will be displayed
during the hot
adjust mode.
Continue to the next page
By the remote controller setting (switch of 4 speeds+Auto)
When [Auto] is set, fan speed is changed depending on the value of:
Desired temperature - Room temperature
Give priority to under-mentioned controlled mode
2-1. Hot adjust mode
2-2. Preheating exclusion mode
2-3. Thermo OFF mode (When the compressor off by the thermostat)
2-4. Cool air prevention mode (Defrosting mode)
Type Fan speed notch
[Low], [Med2], [Med1], [High], [Auto]
4 speeds + Auto type
8-4. 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2°Fwhentheorbuttonis
pressedonetime.Heating63to83°F.
.
OCH579