Mitsubishi Electric City Multi Series PCFY-P15NKMU-E Operating manual

TECHNICAL & SERVICE MANUAL
CONTENTS
1. PART NAMES AND FUNCTIONS..........2
2. SPECIFICATION.....................................4
3. OUTLINES AND DIMENSIONS..............8
4. WIRING DIAGRAM...............................11
5. REFRIGERANT SYSTEM DIAGRAM........12
6. MICROPROCESSOR CONTROL...............13
7. TROUBLESHOOTING..........................20
8. DISASSEMBLY PROCEDURE.............29
Indoor unit
[Model names] [Service Ref.]
PCFY-P15NKMU-E PCFY-P15NKMU-E
PCFY-P24NKMU-E PCFY-P24NKMU-E
PCFY-P30NKMU-E PCFY-P30NKMU-E
PCFY-P36NKMU-E PCFY-P36NKMU-E
No. OCH450
INDOOR UNIT
R22R410A
Note:
•This manual describes only
service data of the indoor
units.
•RoHS compliant products
have <G> mark on the spec
name plate.
February 2009
PARTS CATALOG (OCB450)
Model name
indication
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Indoor unit
1PART NAMES AND FUNCTIONS
Air outlet
Louver
Vane
Air intake
Filter
(Inside of Air intake)
2

3
°F°C
°F°C
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
●
●
Display Section
For purposes of this explanation,
all parts of the display are shown
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
The indicator shows the direc-
tion of the outcoming airflow.
“One Hour Only” indicator
Room Temperature display
Shows the room temperature. The room
temperature display range is 46–102°F.
The display blinks if the temperature
is less than 46°F or 102°F or more.
Louver display
Indicates the action of the swing louver.
Does not appear if the louver is not
running.
(Power On indicator)
Indicates that the power is on.
Fan Speed indicator
Shows the selected fan speed.
Ventilation indicator
Appears when the unit is running in
Ventilation mode.
Operation Section
Temperature setting buttons
Down
Up
Timer Menu button
(Monitor/Set button)
Mode button (Return button)
Set Time buttons
Back
Ahead
Timer On/Off button
(Set Day button)
Opening the
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
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.
Built-in temperature sensor
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,
at which time the airflow direction
also changes.
Wired remote controller

4
2SPECIFICATION
2-1. SPECIFICATIONS
*1 Nominal cooling conditions
Note :
Indoor :
Outdoor :
Pipe length :
Level difference :
80°FDB/67°FWB (26.7°CDB/19.4°CWB)
95°FDB (35°CDB)
25 ft. (7.6 m)
0 ft (0 m)
*2 Nominal heating conditions
70°FDB(21°CDB)
47°FDB/43°FWB (8.3°CDB/6.1°CWB)
25 ft. (7.6 m)
0 ft (0 m)
*3 Connect the joint
(purchased locally) for R22
Unit converter
* Due to continuing improvement, above specification may be subject to change without notice.
kcal/h = kW
×860
Btu/h = kW × 3,412
cfm = m3/min × 35.31
lb = kg/0.4536
*Above specification data is
subject to rounding variation.
Details on foundation work, insulation work, electrical wiring, power source switch, and other items shall be referred to the
Installation Manual.
Model PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-E
Power source 1-phase 208/230V 60Hz
Cooling capacity *1 kW 4.4 7.0 8.8 10.6
(Nominal)*1 Btu/h 15,000 24,000 30,000 36,000
Power input kW 0.03 0.04 0.09 0.11
Current input A 0.35 0.41 0.83 0.97
Heating capacity *2 kW 5.0 7.9 10.0 11.7
(Nominal ) *2 Btu/h 17,000 27,000 34,000 40,000
Power input kW 0.03 0.04 0.09 0.11
Current input A 0.35 0.41 0.83 0.97
External finish MUNSELL (6.4Y 8.9/0.4)
External dimensions H x W x D mm 230×960×680 230×1280×680 230×1600×680
in. 9-1/16×37-13/16×26-3/4 9-1/16×50-3/8×26-3/4 9-1/16×63×26-3/4
Net weight kg (lb) 24 (53)32 (71)36 (79)38 (84)
Heat exchanger Cross fin (Aluminum fin and copper tube)
FAN Type x quantity Sirocco fan × 2 Sirocco fan × 3 Sirocco fan × 4
External Pa 0
static press. mmH2O0
Motor type DC motor
Motor output kW 0.090 0.095 0.160
Driving mechanism Direct-driven by motor
Airflow rate m3/min 10-11-12-13 14-15-16-18 20-22-25-28 21-24-27-31
(Low-Mid2-Mid1-High)L/s 167-183-200-217 233-250-267-300 333-367-417-467 350-400-450-517
cfm 353-388-424-459 494-530-565-636 703-777-883-989 742-847-953-1095
Noise level (Low-Mid2-Mid1-High)
dB <A> 29-32-34-36 31-33-35-37 34-37-40-43 36-39-42-44
(measured in anechoic room)
Insulation material Polyeter sheet
Air filter PP honeycomb
Protection device Fuse
Refrigerant control device LEV
Connectable outdoor unit R410A,R22 CITY MULTI
Diameter of Liquid (R410A)mm(in.)ø6.35 (ø1/4)Flare ø9.52 (ø3/8)Flare ø9.52 (ø3/8)Flare ø9.52 (ø3/8)Flare
refrigerant pipe (R22)ø6.35 (ø1/4)Flare ø9.52 (ø3/8)Flare ø9.52 (ø3/8)Flare ø9.52 (ø3/8)Flare
Gas (R410A)mm(in.)ø12.7 (ø1/2)Flare ø15.88 (ø5/8)Flare ø15.88 (ø5/8)Flare ø15.88 (ø5/8)Flare
(R22)ø12.7 (ø1/2)Flare ø15.88 (ø5/8)Flare ø15.88 (ø5/8)Flare ø19.05(ø3/4)Flare*3
Field drain pipe size mm(in.)O.D. 26mm (1)
Standard
attachment
Document
Accessory
Installation Manual,Instruction Book
Drain joint socket
Optional parts
Remarks
Drain pump kit PAC-SH83DM-E PAC-SH84DM-E
High efficiency filter
External heater adapter
i-see Sensor
Wireless remote controller with i-see Sensor
PAC-SH88KF-E PAC-SH89KF-E PAC-SH90KF-E
Wireless remote controller kit
Installation
PAR-SL93B-E
PAR-SA92MW-E
PAC-SH91MK-E
PAC-YU25HT

5
Parts name
Symbol
TH21
TH22
TH23
FUSE
MF
MV
DP
FS
LEV
TB2
TB5
TB15
Resistance 30°F/15.8kΩ, 50°F/9.6kΩ, 70°F/6.0kΩ, 80°F/4.8kΩ, 90°F/3.9kΩ, 100°F/3.2kΩ
Resistance 30°F/15.8kΩ, 50°F/9.6kΩ, 70°F/6.0kΩ, 80°F/4.8kΩ, 90°F/3.9kΩ, 100°F/3.2kΩ
Resistance 30°F/15.8kΩ, 50°F/9.6kΩ, 70°F/6.0kΩ, 80°F/4.8kΩ, 90°F/3.9kΩ, 100°F/3.2kΩ
250V 6.3A
(L1, L2, GR) Rated to 330V 30A
(M1, M2, S) Rated to 250V 20A
(1, 2) Rated to 250V 10A
Liquid pipe thermistor
Gas pipe thermistor
Vane motor
Drain float switch
Linear expansion valve
PCFY-P24NKMU-EPCFY-P15NKMU-E PCFY-P30NKMU-E
PCFY-P36NKMU-E
Room temperature
thermistor
Fuse
(Indoor controller board)
Drain-pump
(Option)
Fan motor
Power supply terminal
block
Transmission terminal
block
MA remote controller
terminal block
8-pole OUTPUT 90W 8-pole OUTPUT 95W 8-pole OUTPUT 160W
MSBPC20
DC12V 300Ω/phase
INPUT 10.8W 24 /Hr
Open / Short detection DC 5V
DC12V Stepping motor drive
Port dimension ø5.2 (0~2000pulse)
EFM-80YGME
DC12V Stepping motor drive
Port dimension ø3.2 (0~2000pulse)
EFM-40YGME
Note : Refer to WIRING DIAGRAM for the supplied voltage.
Service Ref.
2-3. SOUND LEVEL
* Measured in anechoic room.
PCFY-P•NKMU-E
PCFY-P15NKMU-E
Service Ref.
29-32-34-36
PCFY-P24NKMU-E 31-33-35-37
PCFY-P30NKMU-E 34-37-40-43
PCFY-P36NKMU-E 36-39-42-44
Sound level dB (A)
Sound level at anechoic room : Low-Mid2-Mid1-High
Measurement
3.3ft
(1m)
3.3ft
(1m)
location
2-2. ELECTRICAL PARTS SPECIFICATIONS

6
PCFY-P15NKMU-E
External static pressure : 0Pa
Power source :
208V, 230V, 60Hz
PCFY-P24NKMU-E
External static pressure : 0Pa
Power source :
208V, 230V, 60Hz
PCFY-P30NKMU-E
External static pressure : 0Pa
Power source :
208V, 230V, 60Hz
PCFY-P36NKMU-E
External static pressure : 0Pa
Power source :
208V, 230V, 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 center frequencies (Hz)
Approximate minimum
audible limit on
continuous noise
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
63 125 250 500 1k 2k 4k 8k
NC-60
NC-50
Approximate minimum
audible limit on
continuous noise
NC-40
NC-20
NC-30
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
A
pproximate minimum
audible limit on
continuous noise
NC-40
NC-20
NC-30
Octave band pressure level (dB) 0dB=20μPa Octave band pressure level (dB) 0dB=20μPa
Octave band center frequencies (Hz)
Octave band pressure level (dB) 0dB=20μPa
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
A
pproximate minimum
audible limit on
continuous noise
NC-40
NC-20
NC-30
Octave band pressure level (dB) 0dB=20μPa
High
Low
Middle1
Middle2 High
Low
Middle1
Middle2
High
Low
Middle1
Middle2
High
Low
Middle1
Middle2
2-4. NC CURVES

7
2-5. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
Q
0
BA
C
1Curve in the
graphs
Duct characteristics
at site
Q
A
EC
2
Q
Qa
AD
3
Q…Designed amount of fresh air intake
<CMM(CFM)>
A…Static pressure loss of fresh air
intake duct system with airflow
amount Q <Pa(in.W.G.x10-2)>
B… Forced static pressure at air con-
ditioner inlet with airflow amount Q
<Pa(in.W.G.x10-2)>
C…Static pressure of booster fan with
airflow amount Q <Pa(in.W.G.x10-2)>
D…Static pressure loss increase amount
of fresh air intake duct system for
airflow amount Q <Pa(in.W.G.x10-2)>
E…Static pressure of indoor unit with
airflow amount Q <Pa(in.W.G.x10-2)>
Qa…Estimated amount of fresh air
intake without D <CMM(CFM)>
How to read curves
PCFY-P15NKMU-E
PCFY-P24NKMU-E
■
■
PCFY-P30, 36NKMU-E
■
50(20)
0
-50(-20)
-100(-40)
-150(-60)
-200(-80)
-250(-100)
-300(-120)
Static pressure[Pa(in.W.G.×10ˉ²]
Airflow rate
0 1 2 3 4
[CMM]
[CFM]
50 100
50(20)
0
-50(-20)
-100(-40)
-150(-60)
-200(-80)
-250(-100)
-300(-120)
Static pressure[Pa(in.W.G.×10ˉ²]
Airflow rate
0 1 2 3 4
[CMM]
[CFM]
50 100
50(20)
0
-50(-20)
-100(-40)
-150(-60)
-200(-80)
-250(-100)
-300(-120)
Static pressure[Pa(in.W.G.×10ˉ²]
Airflow rate
0 1 2 3 4
[CMM]
[CFM]
50 100

8
3OUTLINES AND DIMENSIONS
PCFY-P15NKMU-E Unit : inch(mm)
Drainage
When drain socket is installed
When drain socket is installed
Drainage
9-3/16(233)
9-11/16(246)
14
i-see sensor
9-5/16(236)
[FRONT VIEW]
2
5-7/16(138)
1-7/16(37)
6
Φ4-15/16(Φ125)
8(203)
7-1/4(184)
3
18-1/8(461) 15-1/4(387)
2-15/16(75)
7-1/2(190)1-13/16(46)
3(76)4-7/8(124)
33-9/16(853)
1/16(2) 1/16(2)
37-13/16(960)
1-1/2(38)
7-1/2(190)
4-3/4(121)
4-15/16(126)
1/16(2)
3-3/8(86)
3-3/8(85)
10-1/4(260)
34-9/16(878)
3-3/8(85)7-3/16(182)
26-3/4(680)
10(254)
2-1/4(57)
9-1/16(230)
7-11/16(195)
3-5/16(84)
3-1/8(80)
26-3/4(680)
12-5/8(320)
36-1/16(917)(Suspension bolt pitch)
11/16(18)
5-1/2(140) 2-7/16(62)
5-7/8(150)
liquid Φ1/4(Φ6.35)
gas Φ1/2(Φ12.7)
9-11/16(246)
2(51)
3/8(10)
3/16(5)
In case of the rear pipe arrangement, make sure to remove the shaded portions from the independent piece. Then put the independent piece back in initial position.(The heat exchanger might be clogged because of dust)
1/16(1)
87
4
1
5
In case of wireless remote controller and i-see sensor(Optional Parts)
Emergency operation switch <Cooling>
Emergency operation switch <Heating>
DEFROST/STAND BY lamp
Receiver
Operation lamp
When electrical box is pulled down
Electrical box
9-3/16(233)
2
Electrical box
Drainage pipe connection(1(26mm)I.D.) Drainage pipe connection(for the left arrangement) Knock out hole for left drain-piping arrangement Refrigerant-pipe connection(gas pipe side/flared connection) Refrigerant-pipe connection(liquid pipe side/flared connection)
Knock out hole for upper drain pipe arrangement Knock out hole for fresh air intake Φ3-15/16(Φ100) Knock out hole for wiring arrangement Φ7/8(Φ22) Accessory...Drain socket (1(26mm) I.D.)
4 3 2 1 5
8 7 6
Air outlet
Air intake
NOTES. 1.Use M10 or W3/8 screw for anchor bolt. 2.Please be sure when installing the drain lift up mechanism(option parts), refrigerant pipe will be only upward.
Ceiling
18-3/4(476)
In case of wireless remote controller and i-see sensor (Optional Parts)
9/16
6
120°
11/16(18)
1-7/8(48)5/16(8)
3-7/16(88)
4 3 2 1 5
8 7 6

9
PCFY-P24NKMU-E Unit : inch(mm)
When drain socket is installed
9-3/16(233)
Drainage
When drain socket is installed
9-11/16(246)
i-see sensor
14
liquid Φ3/8(Φ9.52) gas Φ5/8(Φ15.88)
Drainage
46-3/16(1173)
1/16(2) 1/16(2)50-3/8(1280)
1-7/8(48)5/16(8)
47-3/16(1198)
3-3/8(85)
7-3/16(182)
26-3/4(680)
18-3/4(476) 2-1/4(57)
9-1/16(230)
7-11/16(195)
3-7/16(88)
3-5/16(84)
3-1/8(80)
26-3/4(680)
12-5/8(320)
48-11/16(1237) (Suspension bolt pitch)
11/16(18)
5-1/2(140) 2-7/16(62)
5-7/8(150)
9-5/16(236)
7-7/8(200)
9-11/16(246)
2(51)
3/8(10)
3/16(5)
15-1/4(387)
3-3/8(86)
3-3/8(85)
4
1
7
1-1/2(38)
2
2-15/16(75)
When electrical box is pulled down
1/16(2)
10-1/4(260)
1/16(1)
7-1/12(190)
1-7/16(37)
5-7/16(138)
4-15/16(126)
In case of the rear pipe arrangement, make sure to remove the shaded portions from the independent piece. Then put the independent piece back in initial position.(The heat exchanger might be clogged because of dust)
8
Ceiling
Electrical box
3
5
[FRONT VIEW]
11/16(18)
4-3/4(121)
Φ4-15/16(Φ125)
7-1/2(190)
3(76)
4-7/8(124)
18-1/8(461)
1-13/16(46)
6
9-3/16(233)
2
NOTES. 1.Use M10 or W3/8 screw for anchor bolt. 2.Please be sure when installing the drain lift up mechanism(option parts),refrigerant pipe will be only upward.
DEFROST/STAND BY lamp
Emergency operation switch <Cooling>
Receiver
Operation lamp
Emergency operation switch <Heating>
In case of wireless remote controller and i-see sensor(Optional Parts)
Knock out hole for upper drain pipe arrangement Knock out hole for fresh air intake Φ3-15/16(Φ100) Knock out hole for wiring arrangement Φ7/8(Φ22) Accessory...Drain socket (1(26mm) I.D.)
8 7 6
3 2 1 4 5
Drainage pipe connection(1(26mm)I.D.) Drainage pipe connection(for the left arrangement) Knock out hole for left drain-piping arrangement Refrigerant-pipe connection(gas pipe side/flared connection) Refrigerant-pipe connection(liquid pipe side/flared connection)
Electrical box
Air outlet
In case of wireless remote controller and i-see sensor (Optional Parts)
9/16
10(254)
7-1/16(180)
7
120°
8
Air intake

10
When drain socket is installed
9-3/16(233)
When drain socket is installed
Drainage
9-11/16(246)
14
NOTES. 1.Use M10 or W3/8 screw for anchor bolt. 2.Please be sure when installing the drain lift up mechanism (option parts),refrigerant pipe will be only upward.
6
80
26-3/4(680)
12-5/8(320)
61-5/16(1557) (Suspension bolt pitch)
11/16(18)
140
62
5-7/8(150)
2-7/165-1/2
3-1/8
Air outlet
58-3/4(1493)
1/16(2) 63(1600)
9-1/16(230)
7-11/16(195)
3-7/16(88)
3-5/16(84)
[FRONT VIEW]
5
1
1-7/8(48)5/16(8)
9-3/16(233)
1-13/16(46)
18-1/8(461)
4-7/8(124) 3(76)
7-1/2(190)
Φ4-15/16(Φ125)
4-3/4(121)
11/16(18)
3
Electrical box
Ceiling
8
In case of the rear pipe arrangement, make sure to remove the shaded portions from the independent piece. Then put the independent piece back in initial position.(The heat exchanger might be clogged because of dust)
4-15/16(126)
5-7/16(138)
1-7/16(37)
7-1/2(190)
1/16(1)
10-1/4(260)
1/16(2)
When electrical box is pulled down
2-15/16(75)
2
1-1/2(38)
7
4
3-3/8(85)
3-3/8(86)
15-1/4(387)
2
Electrical box
Air intake
59-3/4(1518)
26-3/4(680)
18-3/4(476)
57
182 85
7-3/16 3-3/8
2-1/4
In case of wireless remote controller and i-see sensor(Optional Parts)
Emergency operation switch <Heating>
Operation lamp
Receiver
Emergency operation switch <Cooling>
DEFROST/STAND BY lamp
9-5/16(236)
liquid Φ3/8(Φ9.52)
gas Φ5/8(Φ15.88)
Drainage
7-7/8(200)
9-11/16(246)
2(51)
3/8(10)
3/16(5)
9/16
In case of wireless remote controller and i-see sensor (Optional Parts)
1/16(2)
1
120°
2-15/16(75)
10(254)
7-1/16(180)
Knock out hole for upper drain pipe arrangement Knock out hole for fresh air intake Φ3-15/16(Φ100) Knock out hole for wiring arrangement Φ7/8(Φ22) Accessory...Drain socket (1(26mm)I.D.) Drainage pipe connection(1(26mm)I.D.) Drainage pipe connection(for the left arrangement) Knock out hole for left drain-piping arrangement Refrigerant-pipe connection (gas pipe side/flared connection) Refrigerant-pipe connection (liquid pipe side/flared connection)
8 7 6 5 4 3 2 11
PCFY-P30, 36NKMU-E Unit : inch(mm)

11
4WIRING DIAGRAM
CN27
CN32
CN51
CN52
SW2
SW3
SW4
SWE
ZNR01,02
DSA
FUSE
X1
MF
MV
DP
FS
TB2
TB5
TB15
TH22
TH23
LEV
SW1
SW11
SW12
SW14
SWA
SWC
W.B
RU
BZ
LED1
LED2
SW1
SW2
POWER SUPPLY
TRANSMISSION
MA-REMOTE CONTROLLER
PIPE TEMP. DETECTION / LIQUID
(32°F/15ΚΩ, 77°F/5.4ΚΩ Detect)
PIPE TEMP. DETECTION / GAS
(32°F/15ΚΩ, 77°F/5.4ΚΩ Detect)
FAN MOTOR
I-SEE SENSOR MOTOR(OPTIONAL PARTS)MT
VANE MOTOR
DRAIN LIFT UP MECHANISM
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
CN24 EXTERNAL HEATER
REMOTE SWITCH
CENTRALLY CONTROL
REMOTE INDICATION
CAPACITY CODE
MODE SELECTION
MODEL SELECTION
DRAIN LIFT UP MECHANISM (TEST MODE)
DRAIN LIFT UP MECHANISM (OPTIONAL PARTS)
SWITCH
VARISTOR
SURGE ABSORBER
FUSE (T6.3AL250V)
AUX. RELAY
SYMBOL
A. B
OPTIONAL PARTS
ADDRESS BOARD
SWITCH
MODE SELECTION
CEILING HEIGHT 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
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. (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 dip switches differs in the capacity. For the detail, refer to fig.w1.
[LEGEND] LED on indoor board for service
TH21 ROOM TEMP. DETECTION
(32°F/15ΚΩ, 77°F/5.4ΚΩ Detect)
THERMISTOR
ADDRESS SETTING 1s DIGIT
ADDRESS SETTING 10ths DIGIT
BRANCH No.
<w2>Use copper supply wires.
PCFY-P15, 24, 30, 36NKMU-E
19
w Be sure to turn off the source power
and then disconnect fan motor connector.
(Failure to do so will cause trouble in Fan motor)
A.B
(RED)
ADDRESS
CN43
ADDRESS
CN81
(RED)
LED2
ADDRESS
CN42
(RED)
(RED)
ADDRESS
CN82
VANE CNV
(WHT)
SWA
SWC
SW1
MV
SW12 SW11
CN32
(WHT) SW3 SW4
SWE
SW2
SW14
1
2
ON
OFF
ON
OFF ON OFF
ONOFF
9
6
8
5
4
3
2
1
12345678910
12345678910 12345612345
See fig. w 1
M-NET
CN2M
(BLU)
CND
(BLK)
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)
LIQUID/PIPE
CN44
(WHT)
CN41
(WHT)
CN51
(WHT)
CN52
(GRN)
TH21TH23TH22
CN27
(RED)
LED1
X1
DSA
ZNR02
FUSE
ZNR01
TB5
(SHIELD)
TB2
BLU
BLU
RED
BLU
GRN/YLW
TO OUTDOOR UNIT
BC CONTROLLER
REMOTE CONTROLLER
DC24-30V
TO NEXT
INDOOR UNIT
PULL BOX
FUSE(16A)
BREAKER
(16A)
POWER SUPPLY
~208-230V 60Hz
I.B
DC294~325V
RECTIFICATION
BZ
LEV
LED2
SW1
CNB
TO MA-REMOTE
CONTROLLER
DC8.7-13V
TB15
BLU
BLU
SW2 LED1
RU
W.B
Pair No.
J42 J41
45
14
CN4Y
(WHT)
14
1
2
1
4
1
8
1515
16
I-SEE SENSOR MOTOR
CN6Y
(RED)
16
M
13
13
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
ON
OFF
12345678910
ON
OFF 123456
ON
OFF
123456
P15
MODELS
<Fig. w1>
<w2>
SW2 SW3
P24
P30
P36
ON
OFF 123456
ON
OFF 123456
t° t°
14
14
t°
21
CN24
(YLW)
21
2121 74
113
3~
MF
MS M
1~
U
21
U
135
L1
L2
GR
M1
M2
S
M
M
1418
DP
ON
OFF
12345678910
(OPTIONAL PARTS)
(OPTIONAL PARTS)
I-SEE
SENSOR
I-SEE SENSOR
(OPTIONAL PARTS)
I-SEE SENSOR
MT
FLOAT SW
CN4F
(WHT)
When attaching
drain lift up
mechanism
(optional parts),
remove the jumper
connector CN4F
and fit the drain
float switch (FS).
When attaching
drain lift up
mechanism
(optional parts)
FS
14
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.

12
5 REFRIGERANT SYSTEM DIAGRAM
Refrigerant flow in cooling
Refrigerant flow in heating
Strainer (#100 mesh)
Strainer (#100 mesh)
Strainer1 (#50 mesh)
Strainer2 (#100 mesh)
Heat exchanger
Room temparature thermistor TH21
Gas pipe thermistor TH23
Liquid pipe thermistor TH22
Linear expansion valve
Gas pipe
Liquid pipe
Flare connection
Gas pipe
Liquid pipe
PCFY-P15NKMU-E
ø12.7 (1/2)
ø6.35 (1/4)
PCFY-P24NKMU-E
PCFY-P30NKMU-E
PCFY-P36NKMU-E
ø15.88 (5/8)
ø9.52 (3/8)
Item
Service Ref.
Unit : mm (inch)
PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-E

13
MICROPROCESSOR CONTROL6
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
ûF ûC
ûF ûC
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
INDOOR UNIT CONTROL
6-1. COOL OPERATION
<How to operate>
Press POWER ON/OFF button.
Press the operation MODE button to display COOL.
Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 2°F when the or button is
pressed one time. Cooling 67 to 87°F
Control modes Control details
1-1. 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.
Liquid pipe temp. (TH22) turns 50°F or above.
The condition of the thermo OFF has become complete
by thermoregulating, etc.
The operation modes became mode other than COOL.
The 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. Thermoregulating
function
Remarks
Type Fan speed notch
[Low], [Med2], [Med1], [High], [Auto]
4 speeds + Auto type

14
→
Control modes Control details
3-1. Drain pump control
•Drain pump is always 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), the drain pump will be kept on for 3 minutes, then turns OFF.
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], [Low] or [Auto] 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
· "ONLY 1 Hr"
appears on the
wired remote
controller.
ON
OFF
15sec. 15sec. 15sec. 1min.30sec. 1min.30sec.
gg
Float SW
In the water In the air In the water Error
postponement
Drain pump
abnormal

15
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 controlled depending 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
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
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
ûF ûC
ûF ûC
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
6-2. DRY OPERATION
<How to operate>
Press POWER ON/OFF button.
Press the operation MODE button to display DRY.
Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 2°F when the or button is
pressed one time. Dry 67 to 87°F

16
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:
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 float switch is submerged in the water when the
float swich 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
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
ûF ûC
ûF ûC
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
6-3. FAN OPERATION
<How to operate>
Press POWER ON/OFF button.
Press the operation MODE button to display FAN.

17
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
2-1. Hot adjust mode
The fan controller becomes the hot adjuster 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 starts.
B: 5 minutes have passed since the condition A or the indoor liquid pipe
temperature turned 95°F or more.
C: 2 minutes have passed since the condition B. (Terminating the hot adjust mode)
ACB
[Extra Low]
[Low]
Set fan speed by the remote controller
Hot adjust mode *1
2-2. Residual heat exclusion mode
When the condition changes the auxiliary heater ON to OFF (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.
To be continued on 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. Residual heat exclusion mode
2-3. Thermo OFF mode (When the compressor off by the thermoregulating)
2-4. Cool air prevention mode (Defrosting mode)
Type Fan speed notch
[Low], [Med2], [Med1], [High], [Auto]
4 speeds + Auto type
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
ûF ûC
ûF ûC
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
6-4. HEAT OPERATION
<How to operate>
Press POWER ON/OFF button.
Press the operation MODE button to display HEAT.
Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 2°F when the or button is
pressed one time. Heating 63 to 83°F.
<Display in HEAT operation>
[DEFROST]
The [DEFROST] symbol is only displayed during the defrost operation.
[STANDBY]
The [STANDBY] symbol is only displayed during the hot adjust mode.

18
→
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.
(1) Initial setting: OFF →HEAT···[last setting]
When the last setting is [Swing] ··· [Downward D]
When changing the mode from exception of HEAT to HEAT operation
···[Downward D]
(2) Vane position:
Horizontal →Downward A →Downward B →Downward C→Downward D→Swing→Auto
(3) Restriction of vane position
The vane is horizontally fixed for the following modes.
(The control by the remote controller is temporally invalidated and control by
the unit.)
•Thermo OFF
•Hot adjust [Extra low] mode
•Heat defrost mode
3. Drain pump
4. Vane control
(Up/down vane
change)
From the preceding page
3-1. 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 float switch is submerged in the water when the
float swich control judges the sensor is in the water.
3-2. 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 control as
COOL operation

19
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 Remarks
1-1. 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 float switch is submerged in the water when the
float swich control judges the sensor is in the water.
1-2. 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 control
as COOL
operation
PAR-21MAA
ON/OFF
FILTER
CHECK
OPERATION
CLEAR
TEST
TEMP.
MENU
BACK DAY
MONITOR/SET
CLOCK
ON/OFF
ûF ûC
ûF ûC
ERROR CODE
AFTER
TIMER
TIME SUN MON TUE WED THU FRI SAT
ON
OFF
Hr
AFTER
FILTER
FUNCTION
ONLY1Hr.
WEEKLY
SIMPLE
AUTO OFF
6-5. AUTO OPERATION [AUTOMATIC COOL/HEAT CHANGE OVER OPERATION]
<How to operate>
Press POWER ON/OFF button.
Press the operation MODE button to display AUTO.
Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 2°F when the or button is
pressed one time. Automatic 67 to 83°F
6-6. WHEN UNIT IS STOPPED

20
7TROUBLESHOOTING
7-1. HOW TO CHECK THE PARTS
PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-E
Parts name Check points
Disconnect the connector then measure the resistance using a tester.
(At the ambient temperature 50"F~86"F)
(Refer to the next page for a detail.)
Room temperature
thermistor (TH21)
Liquid pipe thermistor
(TH22)
Gas pipe thermistor
(TH23)
Normal
4.3k~9.6k
Abnormal
Open or short
Measure the resistance between the terminals using a tester.
(Winding temperature 68°F)
Measure the resistance between the terminals using a tester.
Drain pump (DP) (Option)
i-see sensor
(Option)
Drain float switch (FS)
(Option)
1
3
YLW
YLW
Normal Abnormal
290Open or short
State of moving part Abnormal
DOWN Other than open
UP
Normal
Open
Short Other than short
Measure the resistance between the terminals using a tester.
(At the ambient temperature of 68°F~86°F)
Vane motor (MV)
Vane motor for
i-see sensor (Option)
Abnormal
Open or short
Red - Yellow
Red - Blue
Red - Orange
Red - White
Connector Normal
300
Measure the resistance between the terminals using a tester.
(At the ambient temperature of 68°F~86°F)
Abnormal
Open or short
Red - Yellow
Red - Blue
Red - Orange
Red - White
Connector Normal
250
Disconnect the connector then measure the resistance valve using a tester.
Linear expansion
valve (LEV)
Abnormal
Open or short
Normal
200$10%
White-Red Yellow-Brown Orange-Red Blue-Brown
Orange
Red
White
Blue
Brown
Yellow
M
Refer to 7-1-2.
Normal
Turn on the indoor unit with the black plastic tape on the outside of i-see sensor controller board.
i-see sensor rotates then pull out the connector of motor for i-see sensor.
With electricity being turned on, measure the power voltage between connectors with tester.
Abnormal
DC 1.857V~ 3.132V Other than the normal
DC 0.939V~ 1.506V
(–)—(+)
i-see sensor connector
i-see sensor (At the ambient temperature of 50°F~104°F)
NOTE : Be careful of handing such a static electricity.
(+)—(–) Other than the normal
4321
43 1
Blue
Black
Pink Brown
2
Black plastic tape
2
1
Moving part
4
3
Switch
Magnet
Moving
Part
Yellow
Blue
Red
Orange
White
Yellow
Blue
Red
Orange
White