Mitsubishi Electronics PU12EK, PU18EK, PU18EK1, PU24EK, PU24EK1 User Manual
...
SPLIT-TYPE, AIR CONDITIONERS
TM
L
I
S
T
E
D
CUS
TECHNICAL & SERVICE MANUAL
<Outdoor unit>
Models
PU12EK
No. OC247
REVISED EDITION-E
PU18EK PU18EK
PU24EK PU24EK1 PU24EK2 PU24EK3
PU30EK PU30EK1 PU30EK2 PU30EK3
PU36EK PU36EK1 PU36EK2 PU36EK3
PU42EK2 PU42EK21
PU42EK7 PU42EK71 PU42EK72
Model name
Outdoor unit
Revision:
•Wiring diagram for PU12EK has been modified in
”8. WIRING DIAGRAM”.
•Transformer and outdoor controller board for
PU12EK has been modified in ”13. PARTS LIST”.
indication
1
CONTENTS
1. FEATURES························································2
2. TECHNICAL CHANGE······································3
3.
COMBINATION OF INDOOR AND OUTDOOR UNITS
4. PART NAMES AND FUNCTIONS·····················4
5. SPECIFICATIONS ·············································5
6. DATA ··································································6
7. OUTLINES AND DIMENSIONS ························9
8. WIRING DIAGRAM··········································13
9.
REFRIGERANT SYSTEM DIAGRAM
10. MICROPROCESSOR CONTROL····················19
11. TROUBLESHOOTING·····································21
12. DISASSEMBLY INSTRUCTIONS····················25
13. PARTS LIST·····················································29
···················18
··············4
Note:
•Refer to other manual as for Indoor Units.
•Please void OC247 REVISED EDITION-D.
Rear
Right
Base
Front
Correction:
Model
Page
33
IncorrectRevise point Correct
PU12EK
FUNCTIONAL PARTS
No.12 CAPILLARY
TUBE
FUNCTIONAL PARTS
No.17 TRANSFORMER
FUNCTIONAL PARTS
No.20 OUTDOOR
CONTROLLER BOARD
T7W 588 425 T7W E07 425
T7W 850 799 T7W A30 799
T7W 850 315 T7W E08 315
43
PU42EK7
PU42EK7
1
PU42EK72
FUNCTIONAL PARTS
No.1 FAN MOTOR
T7W A05 763 T7W 853 763
“ 13. PARTS LIST ” has been modified on page 33 and 43.
1
FEATURES
1. REDI-CHARGED REFRIGERANT SYSTEM
The industry’s first redi-charged refrigerant system.
There is no need to adjust the amount of refrigerant to match the piping length
on- site unless lines exceed 100ft.
You will see a major reduction in installation time and labor costs.
2. HIGH RELIABILITY AND EASY SERVICING
In addition to the self-diagnostic function, units are also equipped with a 3-minute time delay mechanism (cooling), an auto
restart function, an emergency operation function, a test run switch, etc., to assure high reliability and easy servicing.
3. FOUR-WAY PIPING ACCESS MAKES
INSTALLATION LAYOUT EASY
Piping on the outdoor unit may be connected from either of
four directions: front, rear, side or beneath the base.
This easy-access design makes it possible to install a
number of units in a compact arrangement at a single site.
The outdoor unit allows for unheard-of flexibility in
determining a piping layout, thus greatly simplifying
installation.
4. FRONT-ACCESS FACILITATES
MAINTENANCE
The outdoor unit has been designed with a front-access
service panel that allows easy access to all maintenance
point, regardless of the installation layout. What’s more, this
front panel may be removed by loosening only two screws.
It all adds up to greatly simplified maintenance work.
2
TECHNICAL CHANGE2
(OC247 REVISED EDITION-A)
Change of the service parts.
Refer to “13. PARTS LIST” for the details.
PU18EK ➔ PU18EK1
PU24EK ➔ PU24EK1
PU30EK ➔ PU30EK1
PU36EK ➔ PU36EK1
PU42EK2 ➔ PU42EK21
1. OUTDOOR CONTROLLER BOARD has been changed.
2. TRANSFORMER has been changed.
PU18EK ➔ PU18EK1
• CONTACTOR has been changed.
(OC247 REVISED EDITION-B)
PU24EK1 ➔ PU24EK2
PU30EK1 ➔ PU30EK2
PU36EK1 ➔ PU36EK2
• COMPRESSOR has been changed.
(PU24EK model) NH33NBD ➔ NH33NBDT
(PU30EK model) NH41NAD ➔ NH41NAHT
(PU36EK model) NH47NAD ➔ NH47NAHT
Refer to “5. SPECIFICATIONS”, “6. DATA” and “13. PARTS LIST” for details.
PU42EK7 ➔ PU42EK71
1. COMPRESSOR CONTACTOR has been changed to the one equipped THERMAL RELAY.
Refer to 8.WIRING DIAGRAM and 13.PARTS LIST for details.
2. OUTDOOR CONTROLLER BOARD has been changed.
Refer to “13. PARTS LIST” for details.
(OC247 REVISED EDITION-D)
PU24EK2 ➔ PU24EK3
PU30EK2 ➔ PU30EK3
PU36EK2 ➔ PU36EK3
PU42EK71 ➔ PU42EK72
• DRAIN PAN has been added.
<‘‘13. PARTS LIST’’ has been changed.>
PU36EK2 ➔ PU36EK3
• COMPRESSOR CAPACITOR for PU36EK, PU36EK1, PU36EK2 and PU36EK3 are unified.
3
3 COMBINATION OF INDOOR AND OUTDOOR UNITS
Indoor unit
Models
Service
manual No.
PL • AK
PL • FK(2)
PC • EK
PK • FL(3)
PC • GK
PK • FK(3)
OC246
OC001
SECOND EDITION
OC003
SECOND EDITION
OC194
OC185A, OC275
OC278
OC121, OC196A
OC274
18 24 30 36 42
PU
Outdoor unit
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
OC001
SECOND EDITION
OC003
SECOND EDITION
OC192
12
EK EK EK
1 EK
EK
1
EK2
EK3
EK
EK
1
EK2
EK3
EK
EK
1
EK2
EK3
EK2
EK7
EK7
1
EK72
EK21
PK • EK
OC001
SECOND EDITION
OC003
SECOND EDITION
PU18EK
PU18EK
1
Outdoor unit
Air intake
Air outlet
Air intake
Air outlet
PU24EK PU30EK
PU24EK
1 PU30EK1
PU24EK2 PU30EK2
PU24EK
3 PU30EK3
Outdoor unit
Air intake
Air outlet
PU36EK PU42EK2 PU42EK7
PU36EK
1 PU42EK21 PU42EK71
PU36EK
2 PU42EK72
PU36EK3
Outdoor unit
PU12EK
Outdoor unit
Air intake
Air outlet
4
PART NAMES AND FUNCTIONS
4
SPECIFICATIONS5
OUTDOOR UNIT MODELS
External finish
Power supply
Max.fuse size (time delay)
Min.ampacity
Fan motor
Compressor
Crankcase heater
Refrigerant control
Sound level
Dimensions
Weight
Control voltage (by built-in transformer)
REFRIGERANT
REFRIGERANT PIPING
Pipe size
Connection
method
Between the indoor
& outdoor units
Model (type)
W
D
H
Name
Charge
Oil<Model>
Liquid
Gas
Indoors
Outdoors
Height difference
Piping length
V, phase, Hz
A
A
F.L.A.
R.L.A.
L.R.A.
A(W
)
dB
in.
in.
in.
lb
OZ
in.
in.
ft
ft
PU12EK
Model
PU12EK
15
11
0.65
RH167NAB
8.9
29
50
25-9/16
105
4 lbs 14 oz
PU18EK
PU18EK
PU18EK
1
0.75
RH247NAB
12.0
37
53
33-1/2
154
5 lbs 8 oz
3/8
5/8
PU24EK
207
9 lbs 15 oz
37<MS32(N-1)>
PU30EK
20
10 lbs 2 oz
Munsell 5Y 7/1
208/230, 1, 60
Capillary tube
55
Indoor unit-outdoor unit:DC12V
R22
Not supplied(optional parts)
Flared
Flared
PU36EK
22
0.75+0.75
0.16/0.17(33/39)
49-9/16
10 lbs 9 oz
Max, 164
Max. 164
Item
Operating range
Indoor intake air temperature
D.B. 95˚F, W.B. 71˚F
D.B. 67˚F, W.B. 57˚F
Outdoor intake air temperature
D.B. 115˚F
D.B. 0˚F w
Cooling
Maximum
Minimum
PU42EK2 PU42EK7
PU42EK2
PU42EK2
1
27
NH569NXA
20.0
105
38-3/16
13-9/16
260
12 lbs 9 oz
49<MS32(N-1)>
PU42EK7
PU42EK71
PU42EK72
28
ZR42K3PFV
20.4
109
220
11 lbs 0 oz
42<SONTEX 200LT>
w In case of the wind baffle installed.
(In case of the wind baffle is not installed, the minimum temperature is D.B. 23˚F)
PU24EK
PU24EK1
NH33NBD
11.5
52
PU24EK2
PU24EK3
NH33NBDT
10.8
57
PU30EK
PU30EK1
NH41NAD
14.0
73
208
PU30EK2
PU30EK3
NH41NAHT
12.9
75
210
PU36EK
PU36EK1
NH47NAD
17.5
87
220
PU36EK2
PU36EK3
NH47NAHT
15.1
81
222
20
16
34-1/4
11-5/8
0.65+0.65
30
40<MS32(N-1)>
40
0.8+0.8
56
0.11/0.12(23/28)
16<MS-56>
Max. 130
Max. 130
1/2
3/4
MODELS : PU12EK PU18EK PU24EK PU30EK PU36EK PU42EK2 PU42EK7
PU18EK1 PU24EK1 PU30EK1 PU36EK1 PU42EK21 PU42EK71
PU24EK2 PU30EK2 PU36EK2 PU42EK72
PU24EK3 PU30EK3 PU36EK3
5
6
PU12EK
PU42EK7
PU42EK7
1
PU42EK72
Piping length (one way)
100 ft 115 ft 130 ft 145 ft 160 ft 164 ft
Factory
charged
Service Ref.
PU24EK
PU24EK
1
PU24EK2
PU24EK3
PU30EK
PU30EK
1
PU30EK2
PU30EK3
PU18EK
PU18EK
1
PU36EK
PU36EK
1
PU36EK2
PU36EK3
PU42EK2
PU42EK2
1
0
0
0
0
0
0
0
2
2
2
5
5
5
5
4
4
4
10
10
10
10
—
—
6
14
14
14
14
—
—
8
19
19
19
19
—
—
9
20
20
20
20
4 lbs 14 oz
5 lbs 8 oz
9 lbs 15 oz
10 lbs 2 oz
10 lbs 9 oz
12 lbs 9 oz
11 lbs 0 oz
Compressor model
Winding
Resistance
( " )
R-C
S-C
RH167NAB NH33NBD
Unit
PU12EK
PU30EK
PU30EK
1
PU24EK
PU24EK1
PU18EK
PU18EK1
NH41NAD
2.47
4.62
RH247NAB
1.59
3.22
0.92
1.93
NH33NBDT
PU24EK
2
PU24EK3
0.92
1.93
NH41NAHT
PU30EK
2
PU30EK3
0.62
1.51
0.63
1.37
at 68°F (Only PU42EK7 PU42EK7
1 : at 77°F)
Compressor model
Winding
Resistance
( " )
R-C
S-C
Unit
ZR42K3PFV
PU36EK
2
PU36EK3
0.54
1.28
0.55
1.24
NH47NAD
PU36EK
PU36EK
1
0.52
1.28
NH47NAHT
PU42EK2
PU42EK2
1
PU42EK7
PU42EK71
PU42EK72
NH569NXA
0.55
1.24
at 68°F(Only PU42EK7 PU42EK7
1 : at 77°F)
DATA
1. ADDITIONAL REFRIGERANT CHARGE (R22 : oz)
2. COMPRESSOR TECHNICAL DATA
6
3. NOISE CRITERION CURVES
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
PU12EK
50
SPL(dB) LINE
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
SPL(dB) LINE
PU24EK PU30EK
PU24EK1 PU30EK1
PU24EK2 PU30EK2
PU24EK3 PU30EK3
55
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
PU18EK
PU18EK1
53
SPL(dB) LINE
90
80
70
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
SPL(dB) LINE
PU36EK
PU36EK1
PU36EK2
PU36EK3
55
7
90
80
70
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
SPL(dB) LINE
56
PU42EK2 PU42EK7
PU42EK21 PU42EK71
PU42EK72
3.3ft
3.3ft
MICROPHONE UNIT
GROUND
8
OUTLINES AND DIMENSIONS7
5-7/16
29/32
9/32 11-5/8
1-5/16
13-11/32
3-1/32 20-5/8
1-9/16 20-5/8
11-3/32
11-11/16
17-15/32
25-9/16
34-1/4
11-7/8
2-3/8
2-3/8
4-3/4
2-1/16 1-3/4
4-1/8
15/32
2-9/16
21/32
3-5/32
31/32 max.
R 1/4
R25/32
R25/32
Bottom
piping hole
Front right piping holes - detail Figures
Standard bolt length
2-U-shaped
notched
holes
1-5/16
1-21/32
1-25/32
3-3/4
Handle for moving
Rear fresh
air intake
Outlet guide
installation hole
Terminal bed for indoor and outdoor unit connection
Terminal bed for power line
Refrigerant-pipe flared
connection
5/8
Knock out hole
for front piping
Knock out hole
for front piping
Knock out holes
for power line 1-1/16
15/32 29/32 Oval holes
Drain hole
Drain hole
(standard bolt M10)
(refrigerant, drainage
and wiring)
(refrigerant, drainage
and wiring)
Ground terminal
Handle for moving
Service panel
Handle for
moving
Side air intake
Rear piping hole
Air in
Air in
Air out
7-9/32 7-9/32
14-1/4
1-9/16 1-3/32
11/169/16 13
19-11/16
Refrigerant-pipe flared
connection
3/8
1
Front opening
Service space
(for N.E.C)
1/2
36
36
4
Note:Allow adequate
upper clearance.
1/2
8
1/2
Outdoor Unit - necessary surrounding clearance
40
1/2
Outdoor Unit-Necessary surrounding clearance
(Concentrated installation)
The upper side must be open.
4
8
For 10 units or less
Outdoor Unit PU12EK
Unit : inch
9
Outdoor Unit PU18EK
Terminal block for indoor and outdoor unit connection
Terminal block for power line
Ground
terminal
Handle for moving
Service panel
Refrigerant pipe
(Flared) 5/8
Knock out hole
for front piping
4-3/4
(refrigerant. drainage
and wiring)
4-1/8
Drain hole
Drain hole
2-U-shaped
notched
holes
1-5/8
1-3/4
1-5/16
Bottom piping hole
2-9/16
3-1/8
R13/16
Front right piping holes-
detail figures
Standard bolt length
1 max.
1/2
1/2x7/8 Oval holes
(standard bolt W3/8(M10)
Knock out hole for
right piping
(refrigerant. drainage
and wiring)
15-7/8
7-1/18 20-5/18
17-3/18
1
2
13-7/4
13-7/8
21-3/4
2-3/820-5/81-9/16
33-1/2
34-1/4
11-7/8
7-9/32 7-9/32
Front opening
Service space
(for N.E.C)
1/2
36
36
4
Note:Allow adequate
upper clearance.
1/2
8
1/2
1-9/161-1/16
13
14-1/4
11/169/16
19-11/16
Refrigerant pipe
(Flared) 3/8
Outlet guide
installation hole
1
40
1/2
Outdoor Unit-Necessary surrounding clearance
(Concentrated installation)
The upper side must be open.
4
8
For 10 units or less
11-5/8
Side air intake
Handle for
moving
Rear fresh
air intake
Rear piping hole
Handle for moving
3-3/4
5-7/16
2-3/8
Knock out holes for
power line 1-1/16
1-3/4
2-1/16
Air intake
Air intake
Air outlet
11/16
R1/4
R13/16
1/4
Outdoor Unit - necessary surrounding clearance
PU18EK1
Unit : inch
10
Outdoor Unit PU24EK PU30EK
Terminal block for
indoor and outdoor
unit connection
Terminal block for power line
Ground
terminal
Handle
for moving
Service panel
Refrigerant pipe (Flared)
PU24EK [5/8
PU30EK [3/4
Knock out hole
for front piping
4-3/4
(refrigerant. drainage
and wiring)
4-1/8
Drain hole
Drain hole
2-U-shaped
notched
holes
2-1/16
2-1/4
1-9/16
Bottom
piping hole
2-9/16
3-1/8
R13/16
Front right piping holes-
detail figures
Standard bolt length
1 max.
1/2
2-1/2x7/8 Oval holes
(standard bolt M10)W3/8(M10)
Knock out hole
for right piping
(refrigerant.
drainage and wiring)
3-1/4
20-5/8 20-5/82-3/8
13-9/16 23-1/16
1
2
15-1/16
37-34
2-3/820-5/81-9/16
49-9/16
34-1/4
11-7/8
7-9/32 7-9/32
Front opening
Service space
(for N.E.C)
3/8
36
36
4
Note:Allow adequate
upper clearance.
Outdoor Unit - necessary surrounding clearance
1/2
12
1/2
1-9/161-1/16
13
14-1/4
11/169/16
19-11/16
Refrigerant pipe (Flared)
PU24EK [3/8
PU30EK [1/2
Outlet guide
installation hole
1
40
1/2
Outdoor Unit-Necessary surrounding clearance
(Concentrated installation)
The upper side must be open.
6
12
For 10 units or less
11-5/81/4
Side air intake
Handle
for moving
Rear fresh
air intake
Rear piping hole
Handle for moving
3-3/4
5-7/16
2-3/8
Knock out holes for
power line 1-1/16
1-3/4
2-1/16
Air intake
Air intake
Air outlet
11/16
R1/4
R13/16
15-7/8
PU24EK1 PU30EK1
PU24EK2 PU30EK2
PU24EK3 PU30EK3
Unit : inch
11
Terminal block for
indoor and outdoor
unit connection
Terminal block for power line
Ground
terminal
Handle
for moving
Service panel
Refrigerant pipe (Flared)
[3/4
Knock out hole
for front piping
4-3/4
(refrigerant. drainage
and wiring)
4-1/8
Drain hole
Drain hole
2-U-shaped
notched
holes
2-1/16
2-1/4
1-9/16
Bottom
piping hole
2-9/16
3-1/8
R13/16
Front right piping holes-
detail figures
Standard bolt length
1 max.
1/2
2-1/2x7/8 Oval holes
(standard bolt W3/8(M10)
Knock out hole
for right piping
(refrigerant.
drainage and wiring)
3-1/4
20-5/8 20-5/82-3/8
13-9/16 23-1/16
7/8
1-5/16
15-1/16
37-3/4
2-3/820-5/81-9/16
49-9/16
38-3/16
13-7/8
7-9/32 7-9/32
Front opening
Service space
(for N.E.C)
1/2
36
36
6
Note:Allow adequate
upper clearance.
Outdoor Unit - necessary surrounding clearance
1/2
12
1/2
1-9/16 1-1/16
14-31/32
16-1/4
11/169/16
23-5/8
Refrigerant pipe Flared)
[1/2
Outlet guide
installation hole
1
40
1/2
Outdoor Unit-Necessary surrounding clearance
(Concentrated installation)
The upper side must be open.
6
12
For 10 units or less
13-9/161/4
Side air intake
Handle
for moving
Rear fresh
air intake
Rear piping hole
Handle for moving
3-3/4
5-7/16
2-3/8
Knock out holes for
power line 1-1/16
1-3/4
2-1/16
Air intake
Air intake
Air outlet
11/16
R1/4
R13/16
15-7/8
Outdoor UnitPU36EK PU42EK2 PU42EK7
PU36EK1 PU42EK21 PU42EK71
PU36EK2 PU42EK72
PU36EK3
Unit : inch
12
WIRING DIAGRAM8
White connector
When power Supply is 208V
RED WHITE208V
ORANGE 230V
MODEL : PU12EK PU18EK 1
SYMBOL
C
COMPRESSOR CAPACITOR
NAME
C3 FAN CAPACITOR
CH CRANKCASE HEATER
CN3<O. B>
CONNECTING WIRES INDOOR/OUTDOOR
CONNECTOR
CN4T<O. B> TRANSFORMER CONNECTOR
FROM INDOOR UNIT
CONNECTING WIRES
12V DC (polar)
POWER SUPPLY
208/230V
1phase 60Hz
1
2
TB3
TB1
L1
L2
GR
YLW
ORN
BRN AC12.3V
RED
AC12.3V
GRN
SYMBOL
LD1 ~ LD8
LED <CHECK, SERVICE>
NAME
MC COMPRESSOR
MF
OUTDOOR FAN MOTOR (INNER THERMOSTAT)
O. B OUTDOOR CONTROLLER BOARD
SW1, 2, 3<O. B>
SELECT SWITCH <CHECK, SERVICE>
T TRANSFORMER
FC <O. B> FAN CONTROLLER
F <O. B> FUSE <6A>
LED
TH3
O.B
SW1
SW2
LD1
LD2
LD3
LD4
LD5
1
CN3
OFF
ON
CN4T
RED
WHT
208V
230V
LD6
1
234
4
SW3
2
2
1
RED
ORN
T
LD7
WHT
WHT
LD8
CN2
TRF 52C
X12
X11
GRY
GRY
S
A
52C
B
CN4
X12 X11
CH
WHT
WHT
CH
1234
ZNR
52C
R
RED
WHT
U
T
W
63HI
R/1FS/2 T/3
BLU
BLU
BLU
51C
WHT
BLU
C
SYMBOL
TH3
OUTDOOR COIL THERMISTOR
NAME
X11 <O. B> CRANKCASE HEATER RELAY
X12 <O. B> COMPRESSOR RELAY
ZNR <O. B> VARISTOR
52C CONTACTOR
63H2 HIGH PRESSURE SWITCH <PROTECT>
TB1 POWER SUPPLYTERMINAL BLOCK
TB3
CONNECTING WIRES INDOOR/OUTDOOR
TERMINAL BLOCK
51C OVERCURRENT RELAY
FC
5
YLM
YLM
YLM
12
C
WHT
RED
26C
63H2
MF1
51CM
YLM
RED
RED
BLU
BLU
WHT
63H2
R
MC
S
RED
C3MF
ORN
Main functions of LED (when both No. 1 and 2 of
SW3
€
are ¨OFF¨)
LED NO. Output display (light) Check display (flush)
LD1 Compressor indoor command —
LD2 — —
LD3 — TH3 short / open
LD4 Compressor ON 63H2 functions
LD5 Outdoor fan ON —
LD6 — —
LD7 — TH3 overheat protection
LD8 Crankcase heater ON Defective input
NOTES :If the operation stops to function of the protection device, the check display flashes.
How to use SW1 and 2
● Pressing
computer.
● The output display (light) remains during operation but pressing
SW1
€
erases the past check contents loaded on the micro-
SW2
€
displays the past check contents in flashing mode. Pressing the
switch again returns to output display (light).
CAUTION FOR SERVICING
● The connector marked s— ⁄
The compressor stops by disconnecting the white connector as shown at the right.
— is to turn the compressor ON-OFF during servicing.
ı
CAUTION FOR POWER SUPPLYWIRING
● Since LD8 lights when normal power is turned "ON", check the power supply with
the "ON" or "OFF" LD8.
❈ Since the indoor transformer (T) is connected with 230V power, if 208V power is
used, change the wiring connection in the following Procedure.
CAUTION FOR INDOOR AND OUTDOOR CONNECTING WIRES
● Since the indoor and outdoor connecting wires has polarity, make sure to connect the same terminal numbers (1, 2) for indoor and outdoor units.
13
MODELS : PU18EK
White connector
When power Supply is 208V
RED WHITE208V
ORANGE 230V
SYMBOL
C
COMPRESSOR CAPACITOR
C3 FAN CAPACITOR
CH CRANKCASE HEATER
CN3<O. B>
CONNECTING WIRES INDOOR/OUTDOOR
CONNECTOR
CN6T<O. B> TRANSFORMER CONNECTOR
NAME
SYMBOL
LD1 ~ LD8
LED <CHECK, SERVICE>
NAME
MC COMPRESSOR
MF3
OUTDOOR FAN MOTOR (INNER THERMOSTAT)
O. B OUTDOOR CONTROLLER BOARD
SW1, 2, 3<O. B>
SELECT SWITCH <CHECK, SERVICE>
T TRANSFORMER
FC <O. B> FAN CONTROLLER
F3 <O. B> FUSE <6A>
SYMBOL
TH3
OUTDOOR COIL THERMISTOR
NAME
X11 <O. B> CRANKCASE HEATER RELAY
X12 <O. B> COMPRESSOR RELAY
ZNR <O. B> VARISTOR
52C CONTACTOR
63H2 HIGH PRESSURE SWITCH <PROTECT>
TB1 POWER SUPPLYTERMINAL BLOCK
TB3
CONNECTING WIRES INDOOR/OUTDOOR
TERMINAL BLOCK
51C OVERCURRENT RELAY
OFF
ON
234
1
208V
230V
LED
LD8
LD7
LD6
LD5
LD4
LD3
LD2
LD1
4
WHT
WHT
are ¨OFF¨)
X12
X11
TRF 52C
GRY
GRY
52C
TH3
X12 X11
WHT
S
A
B
R
T
WHT
52C
CN2
5
ZNR
CH
CH
U
W
R/1F3S/2 T/3
BLU
BLU
BLU
51C
WHT
BLU
C
YLM
YLM
12
WHT
RED
FC
26C
63H2
51CM
YLM
YLM
RED
RED
BLU
BLU
63H2
R
C
MC
S
1
FROM INDOOR UNIT
CONNECTING WIRES
12V DC (polar)
POWER SUPPLY
208/230V
1phase 60Hz
YLW
2
ORN
TB3
BRN 11.5V AC
RED
ORN 36.0V AC
TB1
L1
L2
GR
O.B
15.5V AC
T
GRN
Main functions of LED (when both No. 1 and 2 of
SW1
SW2
SW3
2
2
1
RED
ORN
1
CN3
CN6T
56
€
RED
WHT
RED
WHT
SW3
LED NO. Output display (light) Check display (flush)
LD1 Compressor indoor command —
LD2 — —
LD3 —
Pipe temperature sensor
short / open
LD4 Compressor ON 63H2 functions
LD5 Outdoor fan ON —
LD6 — —
LD7 — TH3 overheat protection
LD8 Crankcase heater ON Defective input
NOTES :If the operation stops to function of the protection device, the check display flashes.
How to use SW1 and 2
● Pressing
computer.
● The output display (light) remains during operation but pressing
SW1
€
erases the past check contents loaded on the micro-
SW2
€
displays the past check contents in flashing mode. Pressing the
switch again returns to output display (light).
CAUTION FOR SERVICING
● The connector marked s— ⁄
The compressor stops by disconnecting the white connector as shown at the right.
— is to turn the compressor ON-OFF during servicing.
ı
CAUTION FOR POWER SUPPLYWIRING
● Since LD8 lights when normal power is turned "ON", check the power supply with
the "ON" or "OFF" LD8.
❈ Since the indoor transformer (T) is connected with 230V power, if 208V power is
used, change the wiring connection in the following Procedure.
CAUTION FOR INDOOR AND OUTDOOR CONNECTING WIRES
● Since the indoor and outdoor connecting wires has polarity, make sure to connect the same terminal numbers (1, 2) for indoor and outdoor units.
14
WHT
MF3
MF3
RED
ORN
C3
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