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)