Mitsubishi Electric PKFY-P30NKMU-E Service manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
February 2009
No. OCH450
TECHNICAL & SERVICE MANUAL
R410A R22
Indoor unit
[Model names]
PCFY-P15NKMU-E
PCFY-P24NKMU-E
PCFY-P30NKMU-E
PCFY-P36NKMU-E
[Service Ref.]
PCFY-P15NKMU-E
PCFY-P24NKMU-E
PCFY-P30NKMU-E
PCFY-P36NKMU-E
Note:
• This manual describes only
service data of the indoor
units.
• RoHS compliant products
have <G> mark on the spec
name plate.
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
PARTS CATALOG (OCB450)
INDOOR UNIT
Model name
indication
1
PART NAMES AND FUNCTIONS
Indoor unit
Louver
Air outlet
Vane
Filter
(Inside of Air intake)
Air intake
2
Wired remote controller
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.
Day-of-Week
“Sensor” indication
Shows the current day of the week.
Displayed when the remote controller
sensor is used.
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.
“Locked” indicator
Indicates that remote controller buttons have been locked.
Identifies the current operation
“Clean The Filter” indicator
Shows the operating mode, etc.
*Multilanguage display is available.
To be displayed on when it is time to
clean the filter.
TIME SUN MON TUE WED THU FRI SAT
TIMER
Hr
ON
AFTER
Indicates that operation from the
remote controller has been prohibited by a master controller.
FUNCTION
FILTER
°F°C
°F°C
“Centrally Controlled” indicator
Timer indicators
AFTER OFF
ERROR CODE
The indicator comes on if the corresponding timer is set.
WEEKLY
SIMPLE
AUTO OFF
ONLY1Hr.
Fan Speed indicator
Shows the selected fan speed.
“Timer is Off” indicator
Indicates that the timer is off.
Up/Down Air Direction indicator
The indicator shows the direction of the outcoming airflow.
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.
Ventilation indicator
Appears when the unit is running in
Ventilation mode.
“One Hour Only” indicator
Temperature Setting
Shows the target temperature.
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.
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.
Operation Section
ON/OFF button
Temperature setting buttons
Down
Fan Speed button
Up
Timer Menu button
(Monitor/Set button)
Filter
button
(<Enter> button)
Mode button (Return button)
TEMP.
ON/OFF
Set Time buttons
Check button (Clear button)
Back
Ahead
Timer On/Off button
(Set Day button)
Test Run button
MENU
BACK
PAR-21MAA
MONITOR/SET
ON/OFF
FILTER
DAY
CLOCK
CHECK TEST
OPERATION
Airflow Up/Down button
CLEAR
Louver button
(
Operation button)
To return operation
number
Opening the
lid
Built-in temperature sensor
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.
3
2
SPECIFICATION
2-1. SPECIFICATIONS
Model
Power source
Cooling capacity
(Nominal)
PCFY-P15NKMU-E
Power input
Current input
Heating capacity
(Nominal )
Power input
Current input
*1 kW
*1 Btu/h
kW
A
*2 kW
*2 Btu/h
kW
A
4.4
15,000
0.03
0.35
5.0
17,000
0.03
0.35
External finish
External dimensions H x W x D
Net weight
Heat exchanger
FAN
mm
in.
kg (lb)
Type x quantity
External
static press.
Motor type
Motor output
Driving mechanism
Airflow rate
(Low-Mid2-Mid1-High)
Sirocco fan × 2
m /min
L/s
cfm
dB <A>
(R22)
Drain pump kit
High efficiency filter
External heater adapter
i-see Sensor
Wireless remote controller with i-see Sensor
Wireless remote controller kit
Remarks
Installation
Note :
Indoor :
Outdoor :
Pipe length :
Level difference :
0.090
0.095
Direct-driven by motor
14-15-16-18
20-22-25-28
233-250-267-300
333-367-417-467
494-530-565-636
703-777-883-989
31-33-35-37
34-37-40-43
10-11-12-13
167-183-200-217
353-388-424-459
29-32-34-36
ø6.35 (ø1/4) Flare
ø6.35 (ø1/4) Flare
ø12.7 (ø1/2) Flare
ø12.7 (ø1/2) Flare
ø9.52
ø9.52
ø15.88
ø15.88
mm(in.)
Optional parts
*1 Nominal cooling conditions
10.6
36,000
0.11
0.97
11.7
40,000
0.11
0.97
0
0
DC motor
kW
3
PCFY-P36NKMU-E
230×1280×680
230×1600×680
9-1/16×50-3/8×26-3/4
9-1/16×63×26-3/4
32 (71)
36 (79)
38 (84)
Cross fin (Aluminum fin and copper tube)
Sirocco fan × 3
Sirocco fan × 4
Pa
mmH 2O
Noise level (Low-Mid2-Mid1-High)
(measured in anechoic room)
Insulation material
Air filter
Protection device
Refrigerant control device
Connectable outdoor unit
(R410A) mm(in.)
Diameter of
Liquid
(R22)
refrigerant pipe
(R410A) mm(in.)
Gas
Field drain pipe size
Standard
Document
attachment
Accessory
230×960×680
9-1/16×37-13/16×26-3/4
24 (53)
PCFY-P24NKMU-E
PCFY-P30NKMU-E
1-phase 208/230V 60Hz
7.0
8.8
24,000
30,000
0.04
0.09
0.41
0.83
7.9
10.0
27,000
34,000
0.04
0.09
0.41
0.83
MUNSELL (6.4Y 8.9/0.4)
Polyeter sheet
PP honeycomb
Fuse
LEV
R410A, R22 CITY MULTI
(ø3/8) Flare
ø9.52 (ø3/8) Flare
(ø3/8) Flare
ø9.52 (ø3/8) Flare
(ø5/8) Flare
ø15.88 (ø5/8) Flare
(ø5/8) Flare
ø15.88 (ø5/8) Flare
O.D. 26mm (1)
0.160
21-24-27-31
350-400-450-517
742-847-953-1095
36-39-42-44
ø9.52 (ø3/8) Flare
ø9.52 (ø3/8) Flare
ø15.88 (ø5/8) Flare
ø19.05(ø3/4) Flare*3
Installation Manual, Instruction Book
Drain joint socket
PAC-SH83DM-E
PAC-SH88KF-E
PAC-SH84DM-E
PAC-SH89KF-E
PAC-SH90KF-E
PAC-YU25HT
PAC-SH91MK-E
PAR-SA92MW-E
PAR-SL93B-E
Details on foundation work, insulation work, electrical wiring, power source switch, and other items shall be referred to the
Installation Manual.
*2 Nominal heating conditions
80°FDB/67°FWB (26.7°CDB/19.4°CWB)
95°FDB (35°CDB)
25 ft. (7.6 m)
0 ft (0 m)
70°FDB(21°CDB)
47°FDB/43°FWB (8.3°CDB/6.1°CWB)
25 ft. (7.6 m)
0 ft (0 m)
* Due to continuing improvement, above specification may be subject to change without notice.
4
*3 Connect the joint
(purchased locally) for R22
Unit converter
kcal/h
Btu/h
cfm
lb
= kW × 860
= kW × 3,412
= m3/min × 35.31
= kg/0.4536
*Above specification data is
subject to rounding variation.
2-2. ELECTRICAL PARTS SPECIFICATIONS
Service Ref.
Symbol
PCFY-P15NKMU-E
PCFY-P24NKMU-E
Parts name
PCFY-P30NKMU-E
PCFY-P36NKMU-E
Room temperature
thermistor
TH21
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
Liquid pipe thermistor
TH22
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
Gas pipe thermistor
TH23
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
Fuse
(Indoor controller board)
FUSE
250V 6.3A
8-pole OUTPUT 90W
8-pole OUTPUT 95W
Fan motor
MF
Vane motor
MV
MSBPC20
DC12V 300Ω/phase
Drain-pump
(Option)
DP
INPUT 10.8W 24 /Hr
Drain float switch
FS
Open / Short detection DC 5V
DC12V Stepping motor drive
Port dimension ø3.2 (0~2000pulse)
EFM-40YGME
8-pole OUTPUT 160W
DC12V Stepping motor drive
Port dimension ø5.2 (0~2000pulse)
EFM-80YGME
Linear expansion valve
LEV
Power supply terminal
block
TB2
(L1, L2, GR) Rated to 330V 30A
Transmission terminal
block
TB5
(M1, M2, S) Rated to 250V 20A
MA remote controller
terminal block
TB15
(1, 2) Rated to 250V 10A
Note : Refer to WIRING DIAGRAM for the supplied voltage.
2-3. SOUND LEVEL
PCFY-P•NKMU-E
Service Ref.
3.3ft
(1m)
Measurement
location
3.3ft
(1m)
* Measured in anechoic room.
5
Sound level at anechoic room : Low-Mid2-Mid1-High
Sound level dB (A)
PCFY-P15NKMU-E
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
2-4. NC CURVES
PCFY-P24NKMU-E
External static pressure : 0Pa
Power source : 208V, 230V, 60Hz
External static pressure : 0Pa
Power source : 208V, 230V, 60Hz
Middle2
Low
High
Middle1
70.0
65.0
60.0
NC-60
55.0
50.0
NC-50
45.0
40.0
NC-40
35.0
30.0
NC-30
25.0
20.0
15.0
10.0
63
Approximate minimum
audible limit on
continuous noise
125
NC-20
250
500
1k
2k
4k
Octave band pressure level (dB) 0dB=20μPa
Octave band pressure level (dB) 0dB=20μPa
PCFY-P15NKMU-E
65.0
60.0
NC-60
55.0
50.0
NC-50
45.0
40.0
NC-40
35.0
30.0
NC-30
25.0
20.0
15.0
10.0
63
8k
Octave band center frequencies (Hz)
Middle2
Low
High
Middle1
70.0
Approximate minimum
audible limit on
continuous noise
125
250
NC-20
500
1k
2k
Octave band center frequencies (Hz)
External static pressure : 0Pa
Power source : 208V, 230V, 60Hz
External static pressure : 0Pa
Power source : 208V, 230V, 60Hz
Middle2
Low
High
Middle1
70.0
65.0
60.0
NC-60
55.0
50.0
NC-50
45.0
40.0
NC-40
35.0
30.0
NC-30
25.0
20.0
15.0
10.0
63
Approximate minimum
audible limit on
continuous noise
125
250
NC-20
500
1k
2k
4k
Octave band center frequencies (Hz)
8k
Octave band pressure level (dB) 0dB=20μPa
PCFY-P36NKMU-E
Octave band pressure level (dB) 0dB=20μPa
PCFY-P30NKMU-E
4k
Middle2
Low
High
Middle1
70.0
8k
65.0
60.0
NC-60
55.0
50.0
NC-50
45.0
40.0
NC-40
35.0
30.0
NC-30
25.0
20.0
15.0
10.0
63
6
Approximate minimum
audible limit on
continuous noise
125
250
NC-20
500
1k
2k
4k
Octave band center frequencies (Hz)
8k
2-5. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
PCFY-P15NKMU-E
How to read curves
-50(-20)
Curve in the
graphs
A
0
-100(-40)
Q
-150(-60)
-200(-80)
2
C
A
-250(-100)
-300(-120)
0
Duct characteristics
at site
B
1
0
1
2
50
3
4 [CMM]
Q
[CFM]
100
Airflow rate
A
D
3
Q
Qa
Static pressure[Pa(in.W.G.×10ˉ²]
■ PCFY-P24NKMU-E
50(20)
0
-50(-20)
-100(-40)
-150(-60)
-200(-80)
-250(-100)
-300(-120)
0
1
2
50
3
4 [CMM]
[CFM]
100
Airflow rate
Static pressure[Pa(in.W.G.×10ˉ²]
■ PCFY-P30, 36NKMU-E
50(20)
0
-50(-20)
-100(-40)
-150(-60)
-200(-80)
-250(-100)
-300(-120)
0
1
2
50
3
100
4 [CMM]
[CFM]
Airflow rate
7
C
50(20)
E
Static pressure[Pa(in.W.G.×10ˉ²]
■
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 conditioner 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)>
7-1/2(190)
4-3/4(121)
2-15/16(75)
1
2
3
4
5
6
7
8
2
18-1/8(461)
Φ4
-1
12
5)
8
120°
7
15-1/4(387)
1-1/2(38)
11/16(18)
Electrical box
2
5/16(8)
1-7/8(48)
4
5-7/16(138)
1/16(2)
3-3/8(86)
9-11/16(246)
9-3/16(233)
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)
Ceiling
3(76)
4-7/8(124)
7-1/2(190)
Air outlet
1/16(2)
Air intake
Drainage
When drain socket
is installed
3-3/8(85)
1/16(1)
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.)
When electrical box
is pulled down
1-13/16(46)
3
5/1
6(Φ
4-15/16(126)
1-7/16(37)
10-1/4(260)
34-9/16(878)
7-3/16(182)
33-9/16(853)
37-13/16(960)
5-1/2(140)
36-1/16(917)(Suspension bolt pitch)
11/16(18)
1
5-7/8(150)
Electrical box
5
2-7/16(62)
1/16(2)
3-3/8(85)
3-5/16(84)
10(254)
6
9-1/16(230)
[FRONT VIEW]
26-3/4(680)
7-11/16(195)
3-1/8(80)
12-5/8(320)
3-7/16(88)
18-3/4(476)
8
2-1/4(57)
2(51)
9/16
14
i-see sensor
When drain socket
is installed
Drainage
9-11/16(246)
liquid Φ1/4(Φ6.35)
gas Φ1/2(Φ12.7)
9-3/16(233)
8(203)
7-1/4(184)
9-5/16(236)
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.
Emergency operation
switch <Heating>
DEFROST/STAND BY lamp
Receiver
Operation lamp
Emergency operation
switch <Cooling>
In case of wireless remote controller
and i-see sensor(Optional Parts)
In case of wireless
remote controller
and i-see sensor
(Optional Parts)
3/16(5)
3/8(10)
PCFY-P15NKMU-E
26-3/4(680)
3
OUTLINES AND DIMENSIONS
Unit : inch(mm)
7-1/2(190)
1-13/16(46)
1
2
3
4
5
6
7
8
3(76)
4-7/8(124)
8
120°
7
15-1/4(387)
1-1/2(38)
11/16(18)
10-1/4(260)
1-7/8(48)
9-11/16(246)
9-3/16(233)
Drainage
When drain socket
is installed
1/16(1)
Air intake
5-7/16(138)
1/16(2)
3-3/8(86)
3-3/8(85)
4
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.)
2
18-1/8(461)
Ceiling
4-3/4(121)
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)
5/16(8)
When electrical box
is pulled down
2
Electrical box
2-15/16(75)
3
Φ4
5)
6(Φ
12
-15
/1
4-15/16(126)
1-7/16(37)
1
7-1/12(190)
1/16(2)
Air outlet
47-3/16(1198)
46-3/16(1173)
50-3/8(1280)
48-11/16(1237) (Suspension bolt pitch)
5-7/8(150)
Electrical box
5
7-3/16(182)
5-1/2(140)
2-7/16(62)
1/16(2)
12-5/8(320)
3-3/8(85)
3-5/16(84)
10(254)
[FRONT VIEW]
3-1/8(80)
3-7/16(88)
2-1/4(57)
26-3/4(680)
7-11/16(195)
26-3/4(680)
9
18-3/4(476)
6
2(51)
9/16
14
Drainage
9-3/16(233)
9-11/16(246)
DEFROST/STAND BY lamp
Receiver
Operation lamp
Emergency operation
switch <Heating>
liquid Φ3/8(Φ9.52)
gas Φ5/8(Φ15.88)
When drain socket
is installed
7-7/8(200)
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.
i-see sensor
Emergency operation
switch <Cooling>
9-5/16(236)
7-1/16(180)
In case of wireless remote controller
and i-see sensor(Optional Parts)
In case of wireless
remote controller
and i-see sensor
(Optional Parts)
3/16(5)
3/8(10)
PCFY-P24NKMU-E
Unit : inch(mm)
9-1/16(230)
11/16(18)
2
3
18-1/8(461)
4-3/4(121)
7-1/2(190)
1-13/16(46)
3(76)
4-7/8(124)
8
120°
7
15-1/4(387)
1-1/2(38)
11/16(18)
10-1/4(260)
3-3/8(85)
5-7/16(138)
1/16(2)
3-3/8(86)
6
7
8
5
1
2
3
4
1-7/8(48)
9-11/16(246)
9-3/16(233)
1/16(1)
Drainage
When drain socket
is installed
Electrical box
1/16(2)
7-1/2(190)
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.)
2
5/16(8)
Air outlet
59-3/4(1518)
58-3/4(1493)
63(1600)
61-5/16(1557) (Suspension bolt pitch)
5-7/8(150)
4
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)
When electrical box
is pulled down
2-15/16(75)
Ceiling
)
12
5
5/1
6(Φ
Φ4
-1
4-15/16(126)
1-7/16(37)
Electrical box
5
11/16(18)
[FRONT VIEW]
7-3/16
182
5-1/2
140
62
2-7/16
6
1/16(2)
3-3/8
85
3-5/16(84)
Air intake
10(254)
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.
12-5/8(320)
3-7/16(88)
18-3/4(476)
1
2(51)
9/16
14
liquid Φ3/8(Φ9.52)
gas Φ5/8(Φ15.88)
When drain socket
is installed
Drainage
9-3/16(233)
9-11/16(246)
7-7/8(200)
7-1/16(180)
9-5/16(236)
Emergency operation
switch <Heating>
DEFROST/STAND BY lamp
Receiver
Operation lamp
Emergency operation
switch <Cooling>
In case of wireless remote controller
and i-see sensor(Optional Parts)
In case of wireless
remote controller
and i-see sensor
(Optional Parts)
3/16(5)
3/8(10)
9-1/16(230)
3-1/8
80
26-3/4(680)
7-11/16(195)
2-1/4
57
10
26-3/4(680)
PCFY-P30, 36NKMU-E
Unit : inch(mm)
4
WIRING DIAGRAM
PCFY-P15, 24, 30, 36NKMU-E
LED on indoor board for service
[LEGEND]
NAME
INDOOR CONTROLLER BOARD
CONNECTOR EXTERNAL HEATER
DAMPER
REMOTE SWITCH
CENTRALLY CONTROL
REMOTE INDICATION
SURGE ABSORBER
FUSE (T6.3AL250V)
CAPACITY CODE
SWITCH
MODE SELECTION
MODEL SELECTION
DRAIN LIFT UP MECHANISM (TEST MODE)
AUX. RELAY DRAIN LIFT UP MECHANISM (OPTIONAL PARTS)
VARISTOR
LINEAR EXPANSION VALVE
FAN MOTOR
VANE MOTOR
I-SEE SENSOR MOTOR(OPTIONAL PARTS)
TERMINAL
POWER SUPPLY
BLOCK
TRANSMISSION
MA-REMOTE CONTROLLER
THERMISTOR ROOM TEMP. DETECTION
(32°F/15ΚΩ, 77°F/5.4ΚΩ Detect)
SYMBOL
TH22
TH23
A. B
SWA
SWC
SW1
SW11
SW12
SW14
OPTIONAL PARTS
W.B
BZ
LED1
LED2
RU
SW1
SW2
DP
FS
A.B
3
2
1
1 2 3 4 5 6 7 8 910
SW12 SW11
9 0 1
7 8
7 8
4
5 6
1s
DIGIT
MODELS
ON
OFF
P24
ON
OFF
P30
ON
OFF
1
3
BRANCH
No.
5 6
I-SEE SENSOR MOTOR
CN6Y
1 (RED) 6
Pair No.
P36
1
LEV
CN60
(WHT)
CN52
1 (GRN) 5
1 2 3 4 5 6 7 8 9 10
See fig.w1
8
1
2 1
M-NET
CN2M
(BLU)
12345 123456
SWE
DSA
ZNR02
DC294~325V
RECTIFICATION
CN24
(YLW)
9
1 2
FUSE
CN25
(WHT)
1 2
LIQUID/PIPE
CN44
1 (WHT) 4
CN41
1 (WHT) 4
INTAKE
CN20
(RED)
FLOAT SW
CN4F
1 (WHT) 4
1 2
FAN
CNMF
(WHT)
CN27
(RED)
1 2
7
4
9
I-SEE
SENSOR
5
M
6
WHT
YLW
ORN
BLU
RED
BRN
4
TB15
BLU 1
BLU 2
TO MA-REMOTE
CONTROLLER
DC8.7-13V
CNB
BZ
LED2
SW1
MT
I-SEE SENSOR
(OPTIONAL PARTS)
U
LED1
6
CN51
1 (WHT) 5
CND
(BLK)
ZNR01 U
WIRELESS
CN90
(WHT)
1
PULL BOX
TO NEXT
INDOOR UNIT
I.B
ON
OFF
1 2 3 4 5 6 7 8 910
FUSE(16A)
1 3 5
SW2
ON
OFF
4
ADDRESS
CN42
(RED)
ADDRESS
CN81
(RED)
SW4
OFF ON
3
TB2
RED
BLU L1
L2
GRN/YLW
GR
1 2 3 4 5 6
1
BREAKER
(16A)
<w2>
ON
OFF
ON
OFF
4
LED2
1
POWER SUPPLY
~208-230V 60Hz
TO OUTDOOR UNIT
BC CONTROLLER
REMOTE CONTROLLER
DC24-30V
(SHIELD)
1 2 3 4 5 6
1
MA REMOCON
CN3A
(BLU)
I-SEE SENSOR
CN4Y
1 (WHT) 4
Main Power supply (Indoor unit:208-230V)
power on → lamp is lit
Power supply for MA-Remote controller
on → lamp is lit
BLU TB5
M1
BLU
M2
S
1 2 3 4 5 6 7 8 9 10
SW3
VANE CNV
(WHT)
Power supply for
MA-Remote controller
SW3
1 2 3 4 5 6
CN32
(WHT) J42 J41
20 18 16 14 12 10 8 6 4 2
Function
LED2
ON
OFF
1 2 3 4 5 6
8
(RED)
SW14 ADDRESS
CN82
SWC E F 0 1
8
19 17 15 13 11 9 7 5 3 1
SW2
P15
456
2 3
2 3
10ths
DIGIT
5
2
1
Meaning
Main power supply
PCB FOR WIRELESS REMOTE CONTROLLER
BUZZER
LED (OPERATION INDICATION : GREEN)
LED (PREPARATION FOR HEATING : ORANGE)
RECEVING UNIT
EMERGENCY OPERATION (HEAT / DOWN)
EMERGENCY OPERATION (COOL / UP)
DRAIN LIFT UP MECHANISM
DRAIN FLOAT SWITCH
23
9 0 1
Mark
LED1
<Fig. w1>
1
BCD
M
SWA
SW1
4
ON
OFF
MV
NAME
THERMISTOR PIPE TEMP. DETECTION / LIQUID
(32°F/15ΚΩ, 77°F/5.4ΚΩ Detect)
PIPE TEMP. DETECTION / GAS
(32°F/15ΚΩ, 77°F/5.4ΚΩ Detect)
ADDRESS BOARD
CEILING HEIGHT SELECTOR
SWITCH
OPTION SELECTOR
MODE SELECTION
ADDRESS SETTING 1s DIGIT
ADDRESS SETTING 10ths DIGIT
BRANCH No.
(RED) 4
ADDRESS
CN43
789A
SYMBOL
I. B
CN24
CN27
CN32
CN51
CN52
DSA
FUSE
SW2
SW3
SW4
SWE
X1
ZNR01,02
LEV
MF
MV
MT
TB2
TB5
TB15
TH21
W.B
t°
LED1
SW2
M
LEV
t°
RU
TH22 TH23
(OPTIONAL PARTS)
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)
FLOAT SW
CN4F
(WHT)
1
t°
MF
11
M
DP
(OPTIONAL PARTS)
wBe sure to turn off the source power
TH21
1
1~
3~
and then disconnect fan motor connector.
(Failure to do so will cause trouble in Fan motor)
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.
<w2>Use copper supply wires.
1
MS
4
FS
X1
D.U.M 3
CNP
(BLU)
5
REFRIGERANT SYSTEM DIAGRAM
PCFY-P15NKMU-E
PCFY-P24NKMU-E
PCFY-P30NKMU-E
PCFY-P36NKMU-E
Refrigerant flow in cooling
Refrigerant flow in heating
Gas pipe thermistor TH23
Strainer (#100 mesh)
Gas pipe
Flare connection
Liquid pipe thermistor TH22
Liquid pipe
Linear expansion valve
Strainer1 (#50 mesh)
Strainer2 (#100 mesh)
Strainer (#100 mesh)
Room temparature thermistor TH21
Heat exchanger
Service Ref.
PCFY-P15NKMU-E
Item
Unit : mm (inch)
PCFY-P24NKMU-E
PCFY-P30NKMU-E
PCFY-P36NKMU-E
Gas pipe
ø12.7 (1/2)
ø15.88 (5/8)
Liquid pipe
ø6.35 (1/4)
ø9.52 (3/8)
12
6
MICROPROCESSOR CONTROL
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
pressed one time. Cooling 67 to 87°F
TIME SUN MON TUE WED THU FRI SAT
TIMER
Hr
ON
AFTER
AFTER OFF
ERROR CODE
FUNCTION
FILTER
ûFûC
ûFûC
WEEKLY
SIMPLE
AUTO OFF
ONLY1Hr.
TEMP.
MENU
BACK
PAR-21MAA
MONITOR/SET
ON/OFF
ON/OFF
FILTER
DAY
CLOCK
Control modes
1. Thermoregulating
function
CHECK TEST
OPERATION
CLEAR
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.
2. Fan
button is
By the remote controller setting (switch of 4 speeds+Auto)
Type
Fan speed notch
4 speeds + Auto type
[Low], [Med2], [Med1], [High], [Auto]
When [Auto] is set, fan speed is changed depending on the value of:
Room temperature - Desired temperature
13
Remarks
g
g
Control modes
3. Drain pump
Remarks
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.
Float SW
ON
OFF
15sec.
In the water
(up/down vane change)
15sec. 1min.30sec.
In the air
In the water
1min.30sec.
Error
postponement
Drain pump
abnormal
(1) Initial setting: Start at COOL mode and horizontal vane.
(2) Vane position:
Horizontal →Downward A →Downward B →Downward C→Downward D→Swing→Auto
→
4. Vane
15sec.
(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.
14
· "ONLY 1 Hr"
appears on the
wired remote
controller.
6-2. DRY OPERATION
TIME SUN MON TUE WED THU FRI SAT
TIMER
Hr
ON
AFTER
AFTER OFF
ERROR CODE
FUNCTION
FILTER
ûFûC
ûFûC
WEEKLY
SIMPLE
AUTO OFF
ONLY1Hr.
TEMP.
MENU
BACK
PAR-21MAA
MONITOR/SET
ON/OFF
ON/OFF
CHECK TEST
OPERATION
CLEAR
Control modes
Remarks
Control details
1. Thermo regulating 1-1. Thermo regulating function (Function to prevent restarting for 3 minutes)
Setting the Dry thermo by the thermo regulating signal and the room
function
temperature (TH21).
Dry thermo ON Room temperature desired temperature + 2°F
Dry thermo OFF Room temperature desired temperature
Dry thermo Dry thermo
3 min. passed since starting operation
Room
ON
OFF
temperature Thermo regulating signal
Room temperature (T1) time (min) time (min)
ON
Over 64°F
T1
83°F
9
3
83°F > T1
79°F
7
3
79°F > T1
75°F
5
3
3
3
3
10
75°F > T1
OFF
Unconditional
Dry thermo OFF
Less than 64°F
1-2. Freeze prevention control
No control function
2. Fan
Indoor fan operation controlled depending on the compressor conditions.
Dry thermo
Fan speed notch
ON
[Low]
OFF
Excluding the following
Stop
Room temp. < 64°F
[Low]
Note: Remote controller setting is not acceptable.
3. Drain pump
button is
FILTER
DAY
CLOCK
<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
pressed one time. Dry 67 to 87°F
Same control as COOL operation
Same control as COOL operation
4. Vane
(up/down vane change)
15
6-3. FAN OPERATION
<How to operate>
Press POWER ON/OFF button.
Press the operation MODE button to display FAN.
TIME SUN MON TUE WED THU FRI SAT
TIMER
Hr
ON
AFTER
AFTER OFF
ERROR CODE
ûFûC
ûFûC
WEEKLY
SIMPLE
AUTO OFF
ONLY1Hr.
TEMP.
MENU
BACK
PAR-21MAA
MONITOR/SET
FUNCTION
FILTER
ON/OFF
ON/OFF
FILTER
DAY
CLOCK
CHECK TEST
OPERATION
CLEAR
Control modes
1. Fan
Control details
Remarks
Set by remote controller.
Type
Fan speed notch
4 speeds + Auto type
[Low], [Med2], [Med1], [High], [Auto]
When [Auto] is set, fan speed becomes [Low].
2. Drain pump
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.
3. Vane
Same as the control performed during the COOL operation, but with no restriction
(up/down vane change) on the vane's downward blow setting
16
· Same control
as COOL
operation
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
pressed one time. Heating 63 to 83°F.
TIME SUN MON TUE WED THU FRI SAT
TIMER
Hr
ON
AFTER
AFTER OFF
ERROR CODE
ûFûC
ûFûC
WEEKLY
SIMPLE
AUTO OFF
ONLY1Hr.
TEMP.
MENU
BACK
PAR-21MAA
MONITOR/SET
FUNCTION
FILTER
ON/OFF
ON/OFF
<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.
FILTER
DAY
CLOCK
CHECK TEST
OPERATION
CLEAR
Control modes
1. Thermoregulating
function
2. Fan
button is
Remarks
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
By the remote controller setting (switch of 4 speeds+Auto)
Type
Fan speed notch
4 speeds + Auto type
[Low], [Med2], [Med1], [High], [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)
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
Hot adjust mode *1
*1 "STAND BY"
will be displayed
during the hot
adjust mode.
Set fan speed by the remote controller
[Low]
[Extra Low]
A
B
C
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)
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.
To be continued on the next page.
17
From the preceding page
Control details
Control modes
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.
3. Drain pump
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.
(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
→
4. Vane control
(Up/down vane
change)
(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
18
· Same control as
COOL operation
6-5. AUTO OPERATION [AUTOMATIC COOL/HEAT CHANGE OVER OPERATION]
TIME SUN MON TUE WED THU FRI SAT
TIMER
Hr
ON
AFTER
AFTER OFF
ERROR CODE
ûFûC
ûFûC
TEMP.
MENU
BACK
PAR-21MAA
MONITOR/SET
FUNCTION
FILTER
WEEKLY
SIMPLE
AUTO OFF
ONLY1Hr.
ON/OFF
ON/OFF
button is
FILTER
DAY
CLOCK
<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
pressed one time. Automatic 67 to 83°F
CHECK TEST
OPERATION
CLEAR
Control details
Control modes
Remarks
1. Initial value of HEAT mode for room temperature < Desired temperature
operation mode COOL mode for room temperature Desired temperature
2. Mode change (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
3. COOL mode
Same control as cool operation
4. HEAT mode
Same control as heat operation
6-6. WHEN UNIT IS STOPPED
Control modes
1. Drain pump
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.
19
· Same control
as COOL
operation
7
TROUBLESHOOTING
7-1. HOW TO CHECK THE PARTS
PCFY-P15NKMU-E
PCFY-P24NKMU-E
PCFY-P30NKMU-E
Parts name
Room temperature
thermistor
(TH21)
Liquid pipe thermistor
(TH22)
Gas pipe thermistor
(TH23)
Disconnect the connector then measure the resistance using a tester.
(At the ambient temperature 50"F~86"F)
Vane motor (MV)
Measure the resistance between the terminals using a tester.
(At the ambient temperature of 68°F~86°F)
White
Orange
Red
Yellow
Blue
Drain pump (DP) (Option)
YLW
1
3
YLW
PCFY-P36NKMU-E
Check points
Drain float switch (FS)
(Option)
Normal
Abnormal
4.3k~9.6k
Open or short
Connector
Red - Yellow
Red - Blue
Red - Orange
Red - White
(Refer to the next page for a detail.)
Normal
Abnormal
300
Open or short
Measure the resistance between the terminals using a tester.
(Winding temperature 68°F)
Normal
290
Abnormal
Open or short
Measure the resistance between the terminals using a tester.
State of moving part
Normal
Abnormal
1
UP
Short
Other than short
2
DOWN
Open
Other than open
Moving part
Switch
Magnet
3
Moving
Part
4
i-see sensor
(Option)
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.
Black plastic tape
4
3
2 1
i-see sensor (At the ambient temperature of 50°F~104°F)
4 3
2
i-see sensor connector
1
Blue BlackPink Brown
(–)—(+)
Normal
DC 1.857V~ 3.132V
Abnormal
Other than the normal
(+)—(–)
DC 0.939V~ 1.506V
Other than the normal
NOTE : Be careful of handing such a static electricity.
Vane motor for
i-see sensor (Option)
White
Orange
Red
Blue
Linear expansion
valve (LEV)
Yellow
Blue
Yellow
White
Red
Connector
Red - Yellow
Red - Blue
Red - Orange
Red - White
Normal
Abnormal
250
Open or short
Disconnect the connector then measure the resistance valve using a tester.
Normal
Brown
M
Measure the resistance between the terminals using a tester.
(At the ambient temperature of 68°F~86°F)
White-Red
Yellow-Brown
Abnormal
Orange-Red
200 $10%
Orange
20
Blue-Brown
Open or short
Refer to 7-1-2.
7-1-1. Thermistor
<Thermistor characteristic graph>
< Thermistor for lower temperature >
50
Room temperature thermistor (TH21)
Liquid pipe temperature thermistor (TH22)
Gas pipe temperature thermistor (TH23)
Thermistor R0=15kΩ ± 3%
Fixed number of B=3480 ± 2%
Rt=15exp { 3480(
30°F
50°F
70°F
80°F
90°F
100°F
7-1-2.
1
273+(t-32)/1.8
40
Resistance (kΩ)
Thermistor for
lower temperature
1 )}
273
15.8kΩ
9.6kΩ
6.0kΩ
4.8kΩ
3.9kΩ
3.2kΩ
30
20
10
0
-20
0
20
40
60
80
Temperature (°F)
100
120
Linear expansion valve
Operation summary of the linear expansion valve
• Linear expansion valve open/close through stepping motor after receiving the pulse signal from the indoor controller board.
• Valve position can be changed in proportion to the number of pulse signals.
<Connection between the indoor controller board and the linear expansion valve>
Controller board
DC12V
Brown
6
Red
5
Φ4
Blue
4
Φ4
Φ3
Orange
3
Φ3
Φ2
Yellow
2
Φ2
Φ1
White
1
Φ1
Linear expansion valve
4
M
6
5
2
1
White Red
3
Orange
Blue
Brown
Yellow
Connector(CN60)
21
Drive circuit
<Output pulse signal and the valve operation>
Output
Output
(Phase)
1
ON
ON
OFF
OFF
Φ1
Φ2
Φ3
Φ4
2
OFF
ON
ON
OFF
3
OFF
OFF
ON
ON
4
ON
OFF
OFF
ON
Linear expansion valve operation
Note:
• When linear expansion valve operation stops, all output phase
become OFF.
• At phase interruption or when phase does not shift in order, motor
does not rotate smoothly and motor will lock and vibrate.
• When the switch is turned on, 2200 pulse closing valve signal will
be sent till it goes to point in order to define the valve position.
Open
C
D
Valve position (capacity)
Closing a valve : 1 → 2 → 3 → 4 → 1
Opening a valve : 4 → 3 → 2 → 1 → 4
The output pulse shifts in above order.
• When the valve moves smoothly, there is no sound or vibration
occurring from the linear expansion valves, however, when the
pulse number moves from to or when the valve is locked,
more sound can be heard than in a normal situation.
• Sound can be detected by placing the ear against the screw driver
handle while putting the screw driver tip to the linear expansion
valve.
Close
Open
Outdoor unit R410A model : 1400 pulse
Outdoor unit R22 model
: 2000 pulse
Opening a valve all the way
A
E
Close
B
Pulse number
Extra tightening (200~800 pulse)
Trouble shooting
Symptom
Check points
Countermeasures
Operation circuit
failure of the micro
processor
Disconnect the connector on the controller board, then con- Exchange the indoor connect LED for checking.
troller board at drive circuit
6
5
failure.
4
3
2
1
1kΩ LED
When power is turned on, pulse signals will be output for 10
seconds. There must be some defects in the operation circuit
if the LED does not light while the signals are output or keeps
lighting even after the signals stop.
Linear expansion
valve mechanism is
locked.
Motor will idle and make a ticking noise when the motor is
operated while the linear expansion valve is locked.
This ticking sound is the sign of the abnormality.
Exchange the linear expansion valve.
Short or breakage
Measure the resistance between each coil (white-red, yellow- Exchange the linear expanof the motor coil of
brown, orange-red, blue-brown) using a tester. It is normal if sion valve.
the linear expansion the resistance is in the range of 200Ω ±10%.
valve
Valve does not close To check the linear expansion valve, operate the indoor unit If large amount of refrigercompletely.
in fan mode and at the same time operate other indoor units ant is leaked, exchange
the linear expansion valve.
in cooling mode, then check the pipe temperature <liquid
pipe temperature> of the indoor unit by the
outdoor multi controller board operation
monitor. During fan operation, linear expansion valve is closed completely and if there
Thermistor
(Liquid pipe) is any leaking, detecting temperature of
the thermistor will go lower. If the detected
Linear
temperature is much lower than the temexpansion
valve
perature indicated in the remote controller,
it means the valve is not closed all the way.
It is not necessary to exchange the linear expansion valve, if
the leakage is small and not affecting normal operation.
Wrong connection
of the connector or
contact failure
Check the color of lead wire and missing terminal of the con- Disconnect the connector
nector.
at the controller board,
then check the continuity.
22
7-1-3. DC Fan motor (fan motor/indoor controller circuit board)
Check method of DC fan motor (fan motor/indoor controller circuit board)
Notes
· High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service.
· Do not pull out the connector (CNMF) for the motor with the power supply on.
(It causes trouble of the indoor controller circuit board and fan motor.)
Self check
Symptom : The indoor fan cannot turn around.
Wiring contact check
Contact of fan motor connector (CNMF)
Is there contact failure?
Wiring recovery
Yes
No
Power supply check (Remove the connector (CNMF))
Measure the voltage in the indoor controller circuit board.
TEST POINT : VDC (between 1 (+) and 4 (-) of the fan connector): VDC DC294~325V
TEST POINT : VCC (between 5 (+) and 4 (-) of the fan connector): VCC DC15V
Is the voltage normal?
Indoor controller board fuse check
No
No
Is the fuse normal?
Replace the fuse
Yes
OK
Check the operation
Yes
Sensor signal check
Measure the voltage between CNMF and DC 0V
and DC 15V in the indoor controller circuit board.
Replace indoor controller board.
OK
Check the operation
END
NG
No
Does the voltage repeat
DC 0V and DC 15V?
NG
Replace the fan motor
Yes
Replace indoor
controller board
Replace the fan motor
OK
OK
Check the operation
Check the operation
END
NG
NG
Replace the fan motor.
Replace indoor controller board.
23
END
END
7-2. FUNCTION OF DIP SWITCH
Switch Pole
SW1
Function
setting
Operation by switch
Function
ON
OFF
1
Thermistor <Room temperature
detection> position
Built-in remote controller
Indoor unit
2
Filter clogging detection
Provided
Not provided
3
Filter cleaning
2,500 hr
100 hr
4
Fresh air intake
Effective
Not effective
5
Switching remote
display
Indicating fan operation
Thermo ON signal display ON/OFF
6
Humidifier control
7
Low 3
8
Airflow set in case of
Heat thermo OFF at
heating mode
9
Auto restart function
Effective
Not effective
Power ON/OFF by breaker
Effective
Not effective
10
Capacity
P15
SW2
Capacity
code 1~6
setting
P30
ON
OFF
Extra low
Setting air flow
Capacity
P24
1 2 3 4 5 6
P36
1 2 3 4 5 6
3
ON
OFF
ON
OFF
1 2 3 4 5 6 7 8 9 10
Note :
1 Fan operation at heating
mode
2 Thermo ON operation at
heating mode
3
3
SW1-7
OFF
ON
OFF
ON
Depends on SW1-7
SW1-8
OFF
OFF
ON
ON
Extra low
Low
Setting airflow
Stop
Indoor controller board
SW 2
ON
OFF
Remarks
Address board
<Initial setting>
Under
Always operated while the heat in ON 1 Operated depends on the condition 2 suspension
SW 2
ON
OFF
Effective
timing
Set while the unit is off.
Before
power
supply
ON
1 2 3 4 5 6
1 2 3 4 5 6
1
Heat pump/Cooling only
Cooling only
Heat pump
2
Louver
Available
Not available
<Initial setting>
Set for each capacity.
Indoor controller board
Set while the unit is off.
SW3
Function
setting
3
Vane
Available
Not available
4
Vane swing function in heating
Available
(wave-flow)
Not available
5
Vane horizontal angle
Second setting 4
First setting 4
6
Vane cooling limit
angle setting
Horizontal
Setting A,B,C,D
7
Changing the opening of
linear expansion valve
4-deg up
(Heating mode)
Effective
Not effective
Not effective
Effective
8
9
Superheat setting temperature 5
10
Sub cool setting temperature 5
SW4
Model 1~5
Selection
—
—
—
—
In case of replacing the indoor controller board, make sure to set the switch to the
initial setting, which is shown below.
ON
OFF
1 2 3 4 5
<Initial setting>
ON
OFF
Note :
4 SW3-5
Under
suspension
Vane setting
Set up
Set up
Initial setting Setting
Standard
Less draft
●
Vane position
Standard
Upward position than the standard
24
5 Please do not use
SW-3-9,10.
SW9 setting
P15: ON
P24,P30,P36: OFF
6 Each angle can be used
only 1 hour when fan speed
setting Low and Middle 1,2
Indoor controller board
Before
power
supply
ON
Note : 4 SW3-5
SW3-5
OFF
ON
1 2 3 4 5 6 7 8 9 10
Switch Pole
Operation by switch
(High ceiling)
SWA
Ceiling
1~3 (Standard)
height
selector
(Silent)
* Ceiling height can be changed depending
on SWA setting.
3
2
1
SWA
P15, P24
P30, P36
Effective
timing
Remarks
Address board
Under
operation
or
suspension
<Initial setting>
3
2
1
Silent
Standard High ceiling
8.2ft.(2.5m) 8.9ft.(2.7m) 11.5ft.(3.5m)
8.5ft.(2.6m) 9.8ft.(3.0m) 13.8ft.(4.2m)
Address board
90 1
BCDE
<Initial setting>
SW14
F01
45 6
25
Address board
23
How to set branch number SW14 (Series R2 only)
Match the indoor unit’s refrigerant pipe with the BC
contoller’s end connection number
Remain other than series R2 at "0".
45 6
F01
23
SW14
Before
power
supply
ON
78
SW11
90 1
78
SW12
BCDE
78
78
1
How to set address
Example : If address is "3", remain SW12
(for over 10) at "0", and match SW11 (for 1 to 9)
with "3".
23
789A
Rotary switch
45 6
10
45 6
Rotary switch
90 1
789A
SW11
90 1
Address can be set while the
unit is stopped.
<Initial setting>
45 6
SW12
23
SW14
Branch
No.
setting
<Initial setting>
* In this model it is not necessary to
change SWC to the option side.
Address board
23
SW12
10ths digit
address
setting
(Standard)
23
SW11
1s digit
address
setting
(Option)
2
45 6
SWC
Option
selector
J41, J42
Wireless
remote
controller
Pair No.
Jumper
Switch Pole
Effective
timing
Operation by switch
• To operate each indoor unit by each remote controller when installed 2 indoor
units or more are near, Pair No. setting is necessary.
Pair No. setting is available with the 4 patterns (Setting patters A to D).
Make setting for J41, J42 of indoor controller board and the Pair No. of
wireless remote controller.
• You may not set it when operating it by 1 remote controller.
Setting for indoor unit
Jumper wire J41, J42 on the indoor controller board are cut according to
the table below.
Wireless remote controller pair number:
Setting operation
1. Press the SET button (using a pointed implement). Check that the
remote controller's display has stopped before continuing.
MODEL SELECT flashes, and the model No. (3 digits) appears (steadily-lit).
2. Press the MINUTE button twice. The pair number appears flashing.
3. Press the temperature
buttons to select the pair number to set.
4. Press the SET button (using a pointed implement). The set pair number is
displayed (steadily-lit) for 3 seconds, then disappears.
Setting pattern
Indoor controller
Jumper wire
Remarks
<Initial setting>
Pattern A
Pair No.
MODEL SELECT
MODE
FAN
AUTO STOP
VANE
AUTO START
h
CHECK LOUVER
min
TEST RUN
SET
Temperature
button
TEMP
ON/OFF
Under
operation
or
suspension
Model No.
RESET
Minute
button
CLOCK
SET button
Pair No. of wireless
remote controller
J41
J42
A
—
—
0
Factory setting
B
Cut
—
1
—
C
—
Cut
2
—
D
Cut
Cut
3
—
Pair No.4-9 of wireless remote controller is setting pattern D.
SWE
Test run
for
Drain
pump
(Option)
Connector
Drain pump and fan are activated simultaneously after the connector
SWE is set to ON and turn on the power.
SWE
OFF
<Initial setting>
SWE
ON
OFF
SWE
Under
operation
ON
The connector SWE is set to OFF after test run.
26
OFF
ON
7-3. TEST POINT DIAGRAM
7-3-1. Indoor controller board
PCFY-P15NKMU-E
PCFY-P24NKMU-E
PCFY-P30NKMU-E
PCFY-P36NKMU-E
CN60
CN6Y
Linear expansion valve (LEV)
output
12VDC pulse output
i-see sensor motor output
12VDC pulse output
CN3A
CN4Y
Connect to the terminal block (TB15)
(MA-Remote controller connecting wire)
- : 8.7-13V DC (Pin (+))
i-See sensor
CN52
Remote indicator
CNV
CN51
Vane motor output
12VDC pulse
Centrally controlled
CN32
Remote switch
CN44
Pipe temperature thermistor
: Liquid (TH22)
: Gas (TH23)
Jumper wire J41, J42
Pair No.setting for wireless
remote controller
CN4F
LED2
Drain float switch (FS)
Power supply for
MA-Remote controller
CN20
Room temperature
thermistor (TH21)
SW3
Function setting
CN27
SW4
Damper signal output
12VDC( : +)
Model selection
SWE
Test run(Drain pump)
CN90
Connect to the wireless
remote controller board
(W.B)
SW2
Capacity setting
LED1
Main power supply
(Indoor unit : 208-230V)
CN2M
Connect to the terminal block (TB5)
(M-NET transmission connecting wire)
24-30VDC (non-polar)
CNMF
Connect to the
fan motor (MF)
:
:
:
:
DC294~325V
DC15V
DC0~6V
DC0 or DC15V (Stop)
DC7.5V (Operation)
(12VDC pulse)
CND
CNP
Drain pump output (DP)
Power supply for indoor controller board
: 208-230VAC
: 208-230VAC
FUSE
6.3A 250V
27
7-3-2. Address board
PCFY-P15NKMU-E
PCFY-P24NKMU-E
PCFY-P30NKMU-E
PCFY-P36NKMU-E
SWA
SW1
Ceiling height
selector
Function setting
SW12
Address setting
10ths DIGIT
SW11
Address setting
1st DIGIT
SWC
SW14
Option selector
Branch No.
28
8
DISASSEMBLY PROCEDURE
PCFY-P15NKMU-E PCFY-P24NKUM-E
PCFY-P30NKMU-E PCFY-P36NKMU-E
Be careful when removing heavy parts.
(Photo: PCFY-P36NKMU-E)
OPERATING PROCEDURE
PHOTOS & ILLUSTRATIONS
1. Removing the air intake grille
(1) Slide the air intake grille holding knobs (at 2 or 3 locations) to the rear to open the air intake grille. (See Figure 1)
(2) While the air intake grille left open, push the stoppers
on the rear hinges (at 2 or 3 locations) to pull out the air
intake grille. (See Figure 2)
Figure 1
Figure 2
slide
Air intake grille
Air intake grille
holding knobs
hinges
Pull out the air intake grille
2. Removing the indoor controller board and the electrical box
(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the screw from the beam and remove the
beam. (See Photo 1)
(3) Remove 2 screws from the electrical cover, and remove
the electrical cover.
(4) Remove 2 screws from the electrical box and pull the
electrical box downward.
Temporarily secure the electrical box using 2 hooks in
the back of electrical box.
(5) Disconnect the connectors on the indoor controller
board.
Photo 1
[Removing the electrical box]
(6) Disconnect the wires from the terminal blocks and pull
out the electrical box. (See Photo 2)
Photo 2
Electrical cover
Beam
Electrical cover
fixing screws
[Removing the indoor controller board]
(6) Remove the 6 supports from the indoor controller board
and remove the indoor controller board. (See Photo 3)
Electrical box
Electrical box
fixing screw
Photo 3
Room temperature
thermistor (TH21)
Indoor controller
board (I.B.)
Terminal blocks
(TB2),(TB5),(TB15)
29
OPERATING PROCEDURE
3. Removing the room temperature thermistor (TH21)
(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the screw from the beam and remove the beam.
(See Photo 1)
(3) Remove 2 screws from the electrical cover, and remove
the electrical cover.
(4) Remove 2 screws from the electrical box and pull the
electrical box downward.
Temporarily secure the electrical box using 2 hooks in
the back of electrical box.
(5) Disconnect the connector CN20 (red) from the indoor
controller board.
(6) Remove the sensor holder from the electrical box and
remove the thermistor form the holder.
PHOTOS & ILLUSTRATIONS
Photo 4
Casing
Room temperature
thermistor (TH21)
Electrical box
Photo 5
4. Removing the fan motor and right side fan
(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the screw from the beam and remove the beam.
(See Photo 1)
(3) Remove 2 screws from the electrical cover, and remove
the electrical cover.
(4) Remove 2 screws from the electrical box and pull the
electrical box downward.
(5) Temporarily secure the electrical box using 2 hooks in
the back of electrical box.
(6) Remove the lower casing while pressing the 4 catches of
the casing (right side of the fan motor). (See Photo 6)
(7) Loosen the 2 set screws (2 hexagon set screws) of connecting joint and slide the fan motor to the left. (See
Photo 5)
(8) Remove the screw for motor earth wire. (See Photo 5)
(9) Remove the motor piece (left and right, each 1 screw).
(See Photo 5)
(10) Remove the fan motor and right side fan together.
(11) Loosen the set screw (hexagon set screw) of fan and
remove the fan from the shaft. (See Photo 7,8)
Motor piece
fixing screws
Connecting
joint
Casing
Set screws
Motor earth wire
fixing screw
Fan motor
Electrical box
Casing
Photo 6
Casing
Catch
Catch
Photo 8
Catch
Photo 7
Hexagon set screw
30
Hole for driver
OPERATING PROCEDURE
PHOTOS & ILLUSTRATIONS
5. Removing the fan (3 connection)
(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the screw from the beam and remove the beam.
(See Photo 1)
(3) Remove 2 screws from the electrical cover, and remove
the electrical cover.
(4) Remove 2 screws from the electrical box and pull the
electrical box downward.
Temporarily secure the electrical box using 2 hooks in
the back of electrical box.
(5) Remove 2 screws from the left side beam and remove
the beam. (See Photo 9)
(6) Loosen 2 set screws (2 hexagon set screws) of connecting joint. (See Photo 5)
(7) Remove 3 lower casings while pressing each 4 catches
of the casing. (See Photo 6)
(8) Remove the 4 screws from the bearing support. (See
Photo 10)
(9) Slide the connecting joint to the left and remove the fans
and shaft together. (See Photo 11)
(10) Remove the fan from the shaft. (See Photo 7,8 )
Beam
Photo 10
Bearing support
Shaft
Bearing support fixing
screws
Photo 11
Fan (3 connection)
Bearing support
Photo 9
Shaft
6. Removing the side panel
(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the screw from the side panel, and remove the
side panel by sliding the panel to the front.
Figure 3
Side panel
(Right)
Sliding the panel
to the front
Side panel
(Left)
Screw
31
OPERATING PROCEDURE
PHOTOS & ILLUSTRATIONS
Photo 12
7. Removing the vane motor
(1) Remove the air intake. (See Figure 1,2)
(2) Remove the right side panel. (See Figure 3)
(3) Remove the connector of vane motor.
(4) Remove 2 screws of vane motor cover , then remove
vane motor.
Vane motor and cover
Connector
Screws
8. Removing the under panel
(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the left and right side panels. (See Figure 3)
(3) Remove the beam. (See Photo 1)
(4) Remove the electrical cover. (See Photo 1)
(5) Pull the electrical box downward. (See Photo 2)
(6) (Wireless remote controller receiver type only)
Disconnect the connector CNB from the PCB for wireless remote controller and remove the clamp and strap
for wires.
(7) Remove 8 screws from the under panel.
(8) Move the under panel forward by about 7/16in. (10mm)
and remove the under panel.
Photo 13
9. Removing the drain pan
(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the side panel (right and left). (See Figure 3)
(3) Remove the under panel. (See Photo 13)
Remove the screws of the right and left side drain pan.
(See Photo 14)
(4) Remove 2 insulation in centre of the drain pan, and after
removing 2 screws with washer, remove the drain pan.
(See Photo 15,16)
Photo 14
Under panel fixing
screws
Pipe cover fixing screws
Drain pan fixing screws
(left and right
each 1 screw)
(Note)
Please be aware that there might be some drainage left in
the drain pan when you remove the drain pan.
Drain pan
Photo 15
Vane
Photo 16
Screw with
washer
(2 locations)
32
Insulations
OPERATING PROCEDURE
PHOTOS & ILLUSTRATIONS
10. Removing the pipe thermistors/Liquid (TH22) and Gas
(TH23)
(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the left and right side panels. (See Figure 3)
(3) Remove the under panel. (See Photo 13)
(4) Remove the drain pan. (See Photo 14, 15, 16)
(5) Disconnect the connector CN44 (white) from the indoor
controller board.
(6) Remove 6 screws from the pipe cover and remove the
pipe cover. (See Photo 14, 17)
(7) Remove the fastener for wires and remove the thermistors
(liquid and gas) from each holder. (See Photo 18)
Photo 17
Pipe cover fixing
screws
Pipe cover fixing screws
(See Photo 15)
Pipe cover
Photo 18
Gas pipe
thermistor
Liquid pipe
thermistor
Fastener
11. Removing the guide vane
(1) Remove the intake grille. (See Figure 1,2)
(2) Remove the side panel (right and left). (See Figure 3)
(3) Remove the under panel. (See Photo 13)
(4) Remove the drain pan. (See Photo 14, 15,16)
(5) Remove the screw from the guide vane, then remove
the guide vane.
Photo 19
Screw
Drain pan
Guide vane
12. Removing the Auto vane
(1) Remove the intake grille. (See Figure 1,2)
(2) Remove the right side panel. (See Figure 3)
(3) Remove the vane motor and cover. (See Photo 12)
(4) Slide the auto vane to the vane motor side.
(5) Remove 2 axes from each vane support pushing the
vane support to the vane sleeve side.
33
Photo 20
Vane sleeve
Vane support
Vane
Vane motor side
OPERATING PROCEDURE
PHOTOS & ILLUSTRATIONS
Photo 21
13. Removing the heat exchanger and LEV
(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the beam. (See Photo 1)
(3) Remove the electrical cover. (See Photo 1)
(4) Pull the electrical box downward. (See Photo 2)
(5) Disconnect the connector CN60 (white) from the indoor
controller board.
(6) Remove the left and right side panels. (See Figure 3)
(7) Remove the under panel. (See Photo 13)
(8) Remove the drain pan. (See Photo 14,15,16)
(9) Remove the pipe cover. (See Photo 17)
(10) Remove the pipe thermistors (TH22 and TH23) from
each holder. (See Photo 18)
(11) Remove the pipe band fixing screw and remove the
pipe band. (See Photo 21)
(12) Remove 2 screws from the heat exchanger and
remove the heat exchanger with LEV.
Heat exchanger
Pipe band
Pipe band fixing
screw
Photo 22
Heat exchanger
fixing screws
Heat exchanger
34
Vane
35
TM
HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN
Copyright 2009 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Feb. 2009 No. OCH450 PDF 7
Made in Japan
New publication, effective Feb. 2009
Specifications subject to change without notice