TECHNICAL DATA
&
SERVICE MANUAL
FILE NO.
XS1852 / C1852, CL1852
SPLIT SYSTEM AIR CONDITIONER
INDOOR MODEL No.
PRODUCT CODE No.
OUTDOOR MODEL No.
PRODUCT CODE No.
852 068 35
C1852
XS1852
854 016 13
CL1852
852 068 36
Indoor Unit
Outdoor Unit
XS1852
C1852
CL1852
85464849179000
REFERENCE NO. SM830079
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Table of Contents
1. OPERATING RANGE ....................................................................................... 5
2. SPECIFICATIONS ............................................................................................ 6
(1) Unit Specifications ...................................................................................... 6
(2) Major Component Specifications ................................................................ 8
(A) Indoor Unit ............................................................................................ 8
(B) Outdoor Unit.......................................................................................... 9
(3) Other Component Specifications .............................................................. 10
(A) Indoor Unit .......................................................................................... 10
(B) Outdoor Unit........................................................................................ 11
3. DIMENSIONAL DATA..................................................................................... 12
(1) Indoor Unit ................................................................................................ 12
(2) Outdoor Unit.............................................................................................. 13
4. PERFORMANCE CHARTS ............................................................................ 14
(1) Operating Current ..................................................................................... 14
5. AIR THROW DISTANCE CHART ................................................................... 15
6. REFRIGERANT FLOW DIAGRAM ................................................................. 16
7. INSTALLATION INSTRUCTIONS .................................................................. 17
8. ELECTRICAL DATA ....................................................................................... 22
9. ELECTRICAL WIRING DIAGRAMS ............................................................... 23
(1) Indoor Unit ................................................................................................ 23
(2) Outdoor Unit.............................................................................................. 25
10. PROCESSES AND FUNCTIONS.................................................................. 27
(1) Room Temperature Control ...................................................................... 27
(2) Freeze Prevention..................................................................................... 28
(3) Drain Pump Control .................................................................................. 28
(4) Outdoor Fan Speed Control ...................................................................... 29
11. SERVICE PROCEDURES .............................................................................. 30
(1) Troubleshooting ........................................................................................ 30
(2) A Sensor is Defective................................................................................ 40
(3) Operation of Major Electrical Parts ........................................................... 40
(4) Checking the Electrical Components ........................................................ 41
SM830079
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Introduction: Read Me First!
This manual will help you understand and service the air conditioner. To help you find the information you need,
we have divided it into 5 main sections. Each section is divided into chapters with charts, tables and explana-
tions to help you find and repair problems.
❑
❑
Section 1: Specifications, tells you about the physical and electrical make up of the unit, as well
as its heating and cooling capacities. Look in this section to find the correct values for
components and functions.
Section 2: Processes and Functions, explains each different part of the cooling and heating
cycle, and how each control function reacts to changing conditions to keep the room at the set
temperature range.
❑
❑
Section 3: Electrical Data, which has fold-out schematic and wiring diagrams so you can find
the parts you need to check when something is wrong, and see how they should be connected.
Section 4: Service Procedures, has two main parts, a diagnostic chapter to help you find the
specific component to replace or adjust, and a chapter with specific procedures and values to
guide you in checking the electrical components in the unit.
HOW TO USE THIS MANUAL
You can use this manual both as a reference to find specific information about the capacity, functions and
construction of this unit, and as a source of information to help you set up and maintain the unit.
When this unit is not working properly, and the cause is not known, you can use the procedures in
Section 3: Servicing Procedures to find the problem, fix it, and restore the unit to its proper functioning.
This air conditioner has many helpful self diagnostic features to help you identify problem areas quickly.
So you will be ready when a problem happens, we suggest you look this manual over and become familiar with it
by following these steps:
1.
2.
Look at the TABLE OF CONTENTS to get an idea of what is in this manual and where to find it.
Look at the chapter about TROUBLE SHOOTING, so you are familiar with the way the flow
charts work. They are designed to guide you quickly through the possible causes for each kind of
problem that is likely to happen to the Unit. Particularly read the introduction to this section, and
the parts about the self-diagnosis and error codes which show on the display.
3.
4.
Look at the chapter about CHECKING ELECTRICAL COMPONENTS. You already know
about most of these procedures. This chapter gives you the specific values and methods for
these components. If you don’t know some of these procedures, you can easily learn them here.
Read the Instruction Manual! The Instruction Manual is included here because it helps you help
the user to set the temperature controls properly and know how to take care of any simple
problems that may happen, as well as know when to call for service. The Instruction Manual also
has illustrations, care, and installation information not found in the rest of the service manual. It is
short, and if you read it carefully, you will be able to answer the customers questions easily, and
also know the most efficient ways for setting times and temperatures.
Please use this manual to make your work easier, keep the air conditioner functioning well, and keep your
customers satisfied.
SM830079
– 4 –
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1. OPERATING RANGE
XS1852 / C1852
Temperature
Indoor Air Intake Temp. Outdoor Air Intake Temp.
Maximum
Minimum
95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
115 °F DB
67 °F DB
XS1852 / CL1852
Temperature
Indoor Air Intake Temp. Outdoor Air Intake Temp.
Maximum
Minimum
95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
115 °F DB
0 °F DB
SM830079
– 5 –
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2. SPECIFICATIONS
(1) Unit Specifications
MODEL No.
Indoor Unit
XS1852
C1852 , CL1852
Outdoor Unit
POWER SOURCE
PERFORMANCE
Capacity
230 - 208 V / 1 Phase / 60 Hz
Cooling
BTU / h
kW
18,000
17,500
5.13
510
5.27
540
5.5
Air circulation (Hi)
Moisture removal (High)
ELECTRICAL RATINGS
Voltage rating
cu.ft. / min.
Pints / h
5.4
VAC
230
208
Available voltage range
Running amperes*
Max. running amperes**
Power input
VAC
187 - 253
A
8.2
9.7
8.77
10.6
1,740
98
A
W
1,780
97
Power factor
%
S.E.E.R
BTU / Wh
10.6
44.7
10.6
44.6
Max. starting amperes
Maximum fuse size
FEATURES
A
A
20
Controls
Microprocessor
Low ambient control
Timer
Built-in 0 °F (Only for CL1852)
ON / OFF 24-hours & Program
3 and Automatic control / 1 (3 : CL1852)
– / Automatic
Fan speed Indoor / Outdoor
Air deflection
Horizontal / Vertical
Air filter
Washable, easy access
RCS - 5PS4U
Remote controller (Accessory)
Refrigerant control
Refrigerant tubing connections
Drain pump (drain connection)
Compressor
Capillary tube
Flare type
Max. head 9-27/32 in. above drain connection
Rotary
Operation sound
Indoor - Hi / Me / Lo
Outdoor - Hi
dB - A
dB - A
37 / 35 / 31
52
REFRIGERANT TUBING
Limit of tubing length
ft. (m)
ft. (m)
ft. (m)
65 (20)
33 (10)
Limit of tubing length at shipment
Limit of elevation difference
between the two units
Outdoor unit is higher than indoor unit: 23 (7)
Outdoor unit is lower than indoor unit: 23 (7)
Refrigerant tube
outer diameter
Narrow tube
Wide tube
in. (mm)
in. (mm)
1 / 4 (6.35)
5 / 8 (15.88)
Refrigerant amount at shipment
lbs. (kg)
R22 : 4.45 (2.02)
SM830079
– 6 –
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2. SPECIFICATIONS
(1) Unit Specifications
DIMENSIONS & WEIGHT
Indoor unit
9-27/32
Outdoor unit
24-19/32
Unit dimensions
Height
Width
Depth
in. (mm)
in. (mm)
in. (mm)
lbs. (kg)
in. (mm)
in. (mm)
in. (mm)
lbs. (kg)
in. (mm)
in. (mm)
in. (mm)
lbs. (kg)
cu. ft. (m3)
in. (mm)
in. (mm)
in. (mm)
lbs. (kg)
cu. ft. (m3)
(250)
(760)
(760)
(22)
(625)
(880)
(320)
(47)
29-29/32
29-29/32
49
32-21/32
12-19/32
104
Net weight
Indoor grille dimensions
Height
Width
Depth
3-1/16
33-27/32
33-27/32
11
(78)
(860)
(860)
(5)
Net weight
Indoor Unit
Height
Width
Depth
11-6/32
32-14/32
32-25/32
57
(284)
(824)
(833)
(26)
27-30/32
40-18/32
16-6/32
112
(710)
(1,030)
(411)
Package dimensions
Shipping weight
Shipping volume
Indoor grille
(51)
6.9
(0.195)
(104)
(967)
(999)
(8)
10.3
(0.301)
Height
Width
Depth
4-3/32
38-2/32
39-11/32
18
Package dimensions
Shipping weight
Shipping volume
3.5
(0.100)
DATA SUBJECT TO CHANGE WITHOUT NOTICE
Cooling :
Rating conditions (*)
: Indoor air temperature 80 °F DB / 67 °F WB, Outdoor air temperature 95 °F DB / 75 °F WB
Full load conditions (**) : Indoor air temperature 80 °F DB / 67 °F WB, Outdoor air temperature 115 °F DB
SM830079
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2. SPECIFICATIONS
(2) Major Component Specifications
(A) Indoor Unit
MODEL No.
XS1852
230 - 208 V / 1 phase / 60 Hz
RCS - 5PS4U
Source
Remote controller (Accessory)
Controller P. C. B Ass'y
Control circuit fuse
Switch Ass'y
CR - TS2432
250 V, 3 A
SW - X363GS
Fan (Number … diameter)
Fan motor
in.
(mm)
Turbo (1…19-9/32 (490))
Model
SFG6X - 41A5P
Source
230 - 208 V / 1 phase / 60 Hz
No. of pole … r.p.m. (230 V, High)
Nominal output
rpm
W
6 … 451
40
Coil resistance
Ω
BRW - WHT
WHT - VLT
VLT - ORG
:
:
:
114.0
23.9
12.4
,
,
,
ORG - YEL
WHT - PNK
YEL - BLK
:
:
:
66.4
77.4
82.1
(Ambient temperature 68 °F)
Safety device
Operating temperature
Open
Close
VAC,
°F
°F
µF
266 ± 14.4
174.2 ± 27
440 V , 3.5 µF
Run capacitor
Heat exchanger
Coil
Aluminum plate fin / Copper tube
2 … 14.9
Rows … Fins per inch
Face area
ft.2
(m2)
3.2 (0.297)
Panel
Model No.
PNR - XS2432
IND - XS2432
Indicator Lamp Ass'y
Auto louver motor
Auto louver motor … Rated
Coil resistance (Ambient temperature 77 °F)
MT8 - 3C
V, W, rpm
240 VAC , 3 W , 3 rpm
16,430 Ω ± 8 %
Ω
DATA SUBJECT TO CHANGE WITHOUT NOTICE
SM830079
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2. SPECIFICATIONS
(2) Major Component Specifications
(B) Outdoor Unit
MODEL No.
C1852
CL1852
Source
230 - 208 V / 1 phase / 60 Hz
Controller P.C.B. Ass'y
Control circuit fuse
Compressor
—
POW - CL125
250 VAC, 5 A
Rotary (Hermetic)
C - R132H6D
Model
Source
230 - 208 V / 1 phase / 60 Hz
Nominal output
W
cc
Ω
1,300
Compressor oil
500
C – R : 1.442 , C – S : 2.567
Internal type
Coil resistance (Ambient temperature 77 °F)
Safety device
Overload relay models
—
Operating temperature
Open
Close
°F
°F
311 ±
9
188 ± 20
—
Operating ampere (at 77 °F)
A
Run capacitor
VAC,
VAC,
lbs.
µF
W
400 V, 35 µF
Crank case heater
—
230 V, 20 W
Refrigerant amount charged at shipment
(kg)
R22 : 3.59 (1.63)
Propeller
Fan
Number...diameter
Fan motor
in.
(mm)
1 ... 16 - 17/32 (ø420)
Model
KFG6 - 51E6P ... 1
KFG6T - 51B6P ... 1
Source
230 - 208 V / 1 phase / 60 Hz
No. of pole ..... rpm (230 V, High)
Nominal output
C type : 6 ... 830 , CL type : 6 ... 813
50
W
Coil resistance
(Ambient temperature 68 °F)
Ω
BRN – WHT
:
102 , WHT – PNK :
199
Safety device
Internal type
266 ± 14
174 ± 27
440 V, 2 µF
Operating temperature
Open
Close
VAC,
°F
°F
µF
Run capacitor
Heat exchange
Coil
Aluminum plate fin / Copper tube
2 ... 1/16 (1.6)
Rows ..... Fins per inch
Face area
ft.2
(m2)
4.0 (0.372)
DATA SUBJECT TO CHANGE WITHOUT NOTICE
SM830079
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2. SPECIFICATIONS
(3) Other Component Specifications
(A) Indoor Unit
MODEL No.
XS1852
ATR – I104A
AC 220 V, 60 Hz
10.6 V, 0.93 A
9.85 VAC
Power Transformer
Rated
Primary
Secondary
Capacity
Coil resistance
(Ambient temprature 77 °F)
Ω
WHT - WHT
:
101
,
BRN - BRN
:
0.42
Thermistor cut off temperature
Thermistor (Coil sensor)
Coil resistance
°F
266
PBC - 41E - S26
kΩ
14 °F : 23.7
23 °F : 18.8
32 °F : 15.0
,
,
,
41 °F : 12.1
50 °F : 9.7
59 °F : 8.0
Thermistor (Room or coil sensor)
KTEC - 35 - S6
Coil resistance
kΩ
32 °F : 16.5
41 °F : 12.8
50 °F : 10.0
68 °F : 6.3
86 °F : 4.0
,
,
,
,
,
104 °F : 2.7
113 °F : 2.2
122 °F : 1.8
131 °F : 1.5
Reray
G7L - 2A - TUB
AC 220 - 240 V
277 VAC, 25A
WP20SL - 21
AC 200 V, 14.7 W
FS - 0218 - 102
AC 200 V, 50 W
SW - X363GS
IND - XS2432
MT8 - 3C
Coil rated
V
Contact rating
Drain pump
V, A
Rated
Float switch
MAX Rated (Contact rated)
Switch Ass'y
Indicator Lamp Ass'y
Synchronized Motor
DATA SUBJECT TO CHANGE WITHOUT NOTICE
SM830079
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2. SPECIFICATIONS
(3) Other Component Specifications
(B) Outdoor Unit
MODEL No.
CL1852
Compressor Motor Magnetic Contactor
–
Coil rated
–
Coil resistance (at 77 °F)
Contact rated (Main)
Contact rated (Auxiliary)
Power Transformer
Rated
kΩ
–
–
–
ATR - T5
Primary
VAC
220 VAC, 60 Hz
19 V, 15 A
Secondary
Capacity
10 VA
Coil resistance (at 77 °F)
Ω
Primary (WHT - WHT) : 385 ± 10 %
Secondary (BRN - BRN) : 3.3 ± 10 %
276 ˚F, 1A 250 VAC
DTNTKS132B
Thermal cut off temperature
°F
Thermistor (Outdoor Temp. sensor)
Coil resistance
kΩ
14 °F : 23.7
,
,
,
,
50 °F : 9.7
23 °F : 18.8
32 °F : 15.0
41 °F : 12.1
68 °F : 6.5
86 °F : 4.4
104 °F : 3.1
113 °F : 2.6
Reray (1X)
HH62S
DC 12 V
Coil rated
Coil resistance (at 77 °F)
Contact rated
Ω
650 ± 15 %
AC 240 V, 5A
V, A
DATA SUBJECT TO CHANGE WITHOUT NOTICE
SM830079
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3. DIMENSIONAL DATA
(1) Indoor Unit: XS1852
4-29/32
8-21/32
8-1/16
• Remote controller (Accessory)
2-13/32
23/32
4-29/32
5-29/32
7-7/8
10-1/32
32-9/32 (Ceiling opening)
11-23/32
8-1/16
6-1/2
1-3/16
33-27/32
19-11/16
23-7/32 (Suspention bolt pitch)
14
1-7/8
4-29/32
Min. 2-3/8
3-1/32
Dimension : inch
Air intake
Air outlet
Narrow tube (1/4")
Wide tube (5/8")
Drain connection
Power line (conduit size : 1/2")
For discharge duct
Suspention bolt mounting
1331_X_S
SM830079
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3. DIMENSIONAL DATA
(2) Outdoor Unit: C1852, CL1852
Air intake
4-ø15/32"
23-15/16"
5-11/32"
15/32"
Air discharge
34-21/32"
12-19/32"
Narrow tube service valve
ø1/4 (6.35)
Wide tube service valve
ø5/8 (15.88)
Unit: inch (mm)
1880_C_I
SM830079
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4. PERFORMANCE CHARTS
(1) Operating Current
1 Indoor Unit: XS1852
Outdoor Unit: C1852, CL1852
Operating current characteristics versus outdoor ambient temperature and indoor temperature.
(Indoor relative humidity: 50%, Indoor fan speed: High)
230V
Indoor inlet air
D.B. temp. °F (°C)
12
11
10
9
95 (35.0)
80 (26.7)
67 (19.4)
8
7
6
5
70 80 90 100 110 120
(21.1) (26.7) (32.2) (37.8) (43.3) (48.9)
60
(15.6)
Outdoor inlet air D.B. temp. °F (°C)
1881_M_I
230V / 208V
Indoor inlet air
D.B. temp. °F (°C)
(10.5)
(9.8)
150
140
130
(9.1)
(8.4)
(7.7)
120
110
(7.0)
100
(6.3)
(5.6)
90
80
95 (35.0)
80 (26.7)
67 (19.4)
(4.9)
70
(4.2)
(3.5)
60
50
70
80
90 100 110 120
60
(15.6)
(21.1) (26.7) (32.2) (37.8) (43.3) (48.9)
Outdoor inlet air D.B. temp. °F (°C)
1882_M_I
SM830079
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5. AIR THROW DISTANCE CHART
MODEL: XS1852
HORIZONTAL DISTANCE (ft.)
0
3
7
10
13
17
20
0
3
AXIS AIR VELOCITY
7
10
13
COOLING
HIGH
80˚F
FAN SPEED
ROOM AIR TEMP.
LOUVER ANGLE
30˚
1052_X_S
SM830079
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6. REFRIGERANT FLOW DIAGRAM
Indoor Unit: XS1852
Outdoor Unit: C1852, CL1852
Indoor Unit
Outdoor Unit
Wide tube
Wide tube
service valve
Accumulator
O. D.
5/8"
(15.88 mm)
Narrow tube
Narrow tube service valve
Capillary
tube
O. D.
1/4"
(6.35 mm)
1898_C_I
Insulation of Refrigerant Tubing
IMPORTANT
Insulation
To prevent heat loss and wet floors due to dripping
of condensation, both the wide and narrow tubes
must be well insulated with a proper insulation
material. The thickness of the insulation should be
a min. 5/16 in.
Thickness:
Min. 5/16 in.
Thickness:
Min. 5/16 in.
Narrow tube
Wide tube
0999_C_I
After a tube has been
insulated, never try to bend it
CAUTION
into a narrow curve because it
can casue the tube to break or
crack.
SM830079
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7. INSTALLATION INSTRUCTIONS
1) Tubing Length
• Refrigerant tubing between the indoor and
outdoor units should be kept as short as
possible.
Tubing length (L)
INDOOR
UNIT
• Select and decide the installation location
so that the length of the refrigerant tubing
will be within the limits given in Table 1.
Elevation difference (H)
OUTDOOR
UNIT
0711_M_I
Fig. 1
Table 1
Models
C1852
Tubing Data
CL1852
Narrow tube in. (mm)
1/4 (6.35): Thickness 0.0314" (0.8 mm)
5/8 (15.88): Thickness 0.0394" (1.0 mm)
65
Tubing size
outer dia.
Wide tube
in. (mm)
(ft.)
Limit of tubing length
Limit of elevation
Outdoor unit is higher
(ft.)
Outdoor unit is lower
(ft.)
23
23
difference between than indoor unit
the 2 units
than indoor unit
Max. allowable tubing length at shipment (ft.)
Required additional refrigerant *1
(oz./ft.)
33
0.27
No additional charge of compressor oil is necessary.
1
*
If total tubing length becomes 33 to 65 ft., charge additional refrigerant (R22) by 0.27 oz./ft..
SM830079
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7. INSTALLATION INSTRUCTIONS
2) Selecting the Installation Site
Indoor Unit
AVOID:
ã areas where leakage of flammable gas may
be expected.
ã places where large amount of oil mist exist.
ã direct sunlight.
ã locations near heat sources which may
affect performance of the unit.
ã locations where external air may enter the
room directly. This may cause “sweating”
on the air discharge ports, causing them to
spray or drip.
ã locations where the remote control unit will
be splashed with water or affected by
dampness or humidity.
ã installing the remote control unit behind
curtains or furniture.
ã locations where the receiver in the indoor
unit is exposed to the inverter lamp light.
Faulty operation of the unit occurs.
DO:
ã select an appropriate position from which
every corner of the room can be uniformly
cooled.
3 ft.
3 ft.
ã select a location where the ceiling is strong
enough to support the weight of the unit.
3 ft.
3 ft.
ã
select a location where tubing and drain pipe
have the shortest run to the outdoor unit.
3 ft.
ã allow room for operation and maintenance
as well as unrestricted air flow around the
unit. (Fig. 2)
1330_X_S
Fig. 2
ã
install the unit within the maximum elevation
difference above or below the outdoor unit
and within a total tubing length from the
outdoor unit as detailed in Table 1.
ã allow room for mounting the remote control
unit about 3 ft. off the floor, in an area that is
not in direct sunlight nor in the flow of cool
air from the indoor unit.
NOTE
Air delivery will be degraded if the distance from
the floor to the ceiling is greater than 10 ft..
SM830079
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7. INSTALLATION INSTRUCTIONS
Exhaust fan
NO
Outdoor Unit
AVOID:
Hot air
Heat source
ã heat sources, exhaust fans, etc. (Fig. 3)
Out-
door
unit
ã damp, humid or uneven locations.
DO:
1817_C_I
ã choose a place as cool as possible.
Fig. 3
ã choose a place that is well ventilated.
Obstacle above
ã
allow enough room around the unit for air intake/
exhaust and possible maintenance. (Fig. 4)
Min.
Min.
7 ft.
(2 m)
ãInstalltheoutdoorunit
7 ft.
Air intake
Min. 6" (15 cm)
CAUTION
(2 m)
above snowfall line.
Valve side
Min. 10"
(25 cm)
ãDo not place objects
on or sit on the out-
door unit. Also, never
blocktheairintake/out-
let or exhaust. Distor-
tion of the outdoor unit
orincompletecombus-
tion may result.
ãDo not introduce for-
eign matter into the
airintake/outletorex-
haust. Do not poke
them with such ob-
jects as a stick.
Min. 6"
Air discharge
Min. 12"
(30 cm)
(15 cm)
1818_M_I
Ground
Min. 6 in.
(15 cm)
Air intake
1819_M_I
Fig. 4
Anchor bolts
(4 pcs)
Min. 4"
(10 cm)
ã
provide a solid base (level concrete pad,
concrete block, 4 in. × 16 in. (10 × 40 cm)
beams or equal), a minimum of 4 in. (10 cm)
above ground level to reduce humidity and
protect the unit against possible water
damage and decreased service life (Fig. 5).
Air intake
Concrete
or equal
ã use lug bolts or equal to bolt down unit,
reducing vibration and noise.
3) Baffle Plates for the Outdoor Unit
1820_M_I
Fig. 5
(CL×× models only)
6" min
Baffle
plate
Baffle
plate
NOTE
It is recommended to use baffle plates for model
CL1852. The baffle plates are not normally
required for the other models.
When the outdoor unit is installed in a position
exposed to strong wind (like seasonal winds
with low air temperature in winter), baffle plates
must be installed on the outdoor unit. (Fig. 6)
Air discharge
This unit is designed so that the fan of the outdoor
unit runs at low speed when the air conditioner is
operated at low outdoor air temperatures. When the
outdoor unit is exposed to strong wind, the system
pressure drops because of the freeze protector.
1821_M_I
Fig. 6
SM830079
– 19 –
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7. INSTALLATION INSTRUCTIONS
4) Electrical Wiring
(7) Regulations on wire diameters differ from
locality to locality. For field wiring rules,
please refer to your LOCAL ELECTRI-
CAL CODES (ex. National Electric Code:
ANSI/NFPA70) before beginning. You
must ensure that installation complies
with all relevant rules and regulations.
General Precautions on Wiring
(1) Before wiring, confirm the rated voltage
of the unit as shown on its nameplate,
then carry out the wiring closely following
the wiring diagram.
(2) Provide a power outlet to be used exclu-
sively for each unit, and a power supply
disconnect and circuit breaker for
overcurrent protection should be pro-
vided in the exclusive line.
(8) To prevent malfunction of the air condi-
tioner caused by electrical noise, care
must be taken when wiring as follows:
(3) To prevent possible hazards from insula-
tion failure, the unit must be grounded.
ã The inter-unit control wiring and the remote
control wiring (option) should be wired
apart from the inter-unit power wiring.
(4) Each wiring connection must be done in
accordance with the wiring system dia-
gram. Wrong wiring may cause the unit
to misoperate or become damaged.
(5) Do not allow wiring to touch the refriger-
ant tubing, compressor, or any moving
parts of the fan.
(6) Unauthorized changes in the internal
wiring can be very dangerous. The
manufacturer will accept no responsibility
for any damage or misoperation that
occurs as a result of such unauthorized
changes.
SM830079
– 20 –
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7. INSTALLATION INSTRUCTIONS
Recommended Wire Length and Wire Diameter for Power Supply System
Power Supply Terminal Base
(Outdoor Unit)
(B)*1 Inter-unit
Wiring
Time Delay
Fuse or
Circuit
(A)*1 Power Supply
Models
Max. Wire
Diameter
Capacity
Capacity
AWG #12
75 ft.
AWG #12
65 ft.
C1852, CL1852
15 A
20 A
AWG #12
*1 Refer to the Wiring System Diagrams (See below diagram) for the meaning of “A”, “B”.
AWG = American Wire Gauge
NOTE
To access the electrical component box,
open the air intake grille and remove the
electrical component box cover.
Wiring System Diagram
Single-phase
60 Hz, 230 / 208 V
ã Conduit's trade size for this unit is 1/2".
The conduit can be purchased at a hard-
ware store.
INDOOR UNIT
(Inter-unit)
INDOOR
OUTDOOR UNIT
ã The fuse located in the outdoor unit pro-
Power lines
B
vides power supply protection and may
blow when power is applied if the system
has been incorrectly wired.
230/208 V
230/208 V
230/208 V
1
2
3
1
2
3
4
5
6
Fuse
(1) Ground the unit in accordance with local
codes.
A
Disconnect
switch
(Field supply)
L1
L2
(2) Be sure to size each wire allowing sev-
eral inches longer than the required
length for wiring.
G
G
Grounding
line
1823_M_I
Fig. 7
(3) Use lock nuts to secure the conduit
tubes.
ãBe sure to comply with
local codes while run-
ning the wire from the
indoor unit to the out-
door unit (size of wire
and wiring method,
etc.).
ãEvery wire must be
connected firmly.
ãNo wire should be
allowed to touch refrig-
erant tubing, the com-
pressor or any moving
part.
ãTo avoid the risk of
electric shock, each air
conditioner unit must
be grounded.
ãBe sure to connect the
power supply line to
the outdoor unit as
shown in the wiring
diagram. The indoor
unit draws its power
from the outdoor unit.
CAUTION
SM830079
– 21 –
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8. ELECTRICAL DATA
● Electrical characteristics
Indoor model: XS1852 / Outdoor model: C1852, CL1852
Indoor Unit
Outdoor Unit
Fan Motor Compressor
230 - 208 V / 1 phase / 60 Hz 230 - 208 V / 1 phase / 60 Hz
Complete Unit
Fan Motor
Performance at
A
kW
A
0.60 - 0.60
0.12 - 0.11
0.60 - 0.60
0.12 - 0.11
1 - 1
0.5 - 0.5
0.11 - 0.10
0.5 - 0.5
7.1 - 7.7
1.56 - 1.53
8.4 - 9.5
8.2 - 8.77
1.79 - 1.74
9.7 - 10.57
2.16 - 2.17
44.7 - 44.6
Rating conditions
Full load conditions
Starting amperes
kW
A
0.11 - 0.10
0.7 - 0.6
1.93 - 1.96
43 - 43
Rating Conditions
: Indoor Air Temperature
80 °F DB / 67 °F WB
Outdoor Air Temperature 95 °F DB
Full Load Conditions : Indoor Air Temperature
Outdoor Air Temperature 115 °F DB
80 °F DB / 67 °F WB
SM830079
– 22 –
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9. ELECTRICAL WIRING DIAGRAMS
(1) Indoor Unit
1 XS1852
• Electric Wiring Diagram
LM
IND Lamp
Assy
1
7
Switch
Assy
1
2 3
S
P
1
1
2
3
3
2
Connector
3P(WHT)
GRN/YEL
Earth
Terminal
1
2
1
2
1
2
3
1
7
1
3
2P(RED)
TH1
2P(YEL)
TH2
3P(WHT)
SW ASSY
7P(WHT)
W/LESS
3P(GRN)
LM
Controller (CR-TS2432)
SUP
5P(WHT)
PRY
2P(WHT)
SEC
2P(WHT)
DP
3P(BLU)
FS
3P(RED)
FM 7P(WHT) 3P(WHT)
COM M H L 49FMI
E
1
3
5
1
2
1
2
1
3
1
3
1
3
5
7
1
3
S
2
P
2
1 6
PR
0 8
4
2
1
1
RC1
P
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
S
DP
P
S
FS
Earth
Terminal
2
3
G
1
TR1
Terminal Plate(4P)
To Outdoor Unit
FMI
GRN/YEL
Earth
Earth
Terminal
Terminal
W 854-2-5268-872-00-0 (XS1852)
SM830079
– 23 –
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9. ELECTRICAL WIRING DIAGRAMS
(1) Indoor Unit
1 XS1852
• Schematic Diagram
CR-TS2432
Controller
4P-1
2
1
3
PRY
F1
(3A)
SEC
2
2
1
1
7
1
7
W/
LESS
IND
SW
1
TR1
4P-3
1
2
3
1
2
3
SW
ASSY
5
H
M
L
1
1
1
5
3
7
4
6
5
RY1
RY2
RY3
RY4
RY5
FS
1
3
FS
1
3
PR
LM
DP
FMI
LM
DP
2
1
49FMI
TH1
Coil
1
2
RC1
TH1
2
3
8
49FI
TH2
1
2
9
1
TH2
Room
3
4P-2
1
Symbols
Description
Symbols
Description
FMI
Indoor Fan Motor
FS
Float Switch
49FI
RC1
F1
Indoor Motor Thermal Protector
Running Capacitor
Fuse
TH1
TH2
Thermistor (Indoor Coil)
Room Thermistor
CR-TS2432 Indoor Controller
DP
Drain Pump
IND
SW
Indicator Lamp Assy
Switch Assy
Terminal Plate
Connector
LM
Auto Louver Motor
Power Transformer
Power Relay
TR1
PR
RY1-RY5
Auxiliary Relay
Terminal
S 854-2-5268-872-00-0 (XS1852)
SM830079
– 24 –
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9. ELECTRICAL WIRING DIAGRAMS
(2) Outdoor Unit
1 C1852
• Electric Wiring Diagram
Terminal
Plate (6P)
1
2
3
BLK
Overload Relay
RED
WHT
BLK
G
4
5
WHT
6
L1
L2
G
Power
Supply
R
S
C
FM
CM
Fan Motor
Compressor
Motor
SM830079
– 25 –
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9. ELECTRICAL WIRING DIAGRAMS
(2) Outdoor Unit
1 CL1852
• Electric Wiring Diagram
Fuse
BLK (01)
Terminal
Plate (6P)
BLK (02)
1
2
3
WHT (03)
Controller
(Outdoor Air)
Thermistor
S
P
1
S
1
1
3
1
3
BLK (04)
RED (05)
TH2
TH1
BLK
BLU
BLK
BLK
2
2
Connector
R1
R2
G
4
5
FM
1
1
3
3
5
5
7
7
6
(
18
)
L1
L2
G
1
2
2
3
3
4
P
Power
Supply
1
4
S
( 22 )
(
21
)
(
17
)
Heater
Relay
6
5
7
8
FM
P
S
Fan Motor
4
2
3
1
Power Transformer
R
S
C
WHT (09)
CM
WHT (10)
Crankcase Heater
Compressor
Motor
BLK (12)
BLK (11)
SM830079
– 26 –
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10. PROCESSES AND FUNCTIONS
(1) Room Temperature Control
The Unit adjusts room temperature by turning the outdoor unit’s compressor ON and OFF.
This process is controlled by the thermostat located in the remote control unit.
The figures on this and the next pages show how each part of the system performs when the
room temperature changes and the thermostat activates the compressor to start (thermo ON)
or stop (thermo OFF). Fig. 8 shows about the cooling cycle.
ROOM TEMPERATURE
WITHIN 3 MINUTE
MORE THAN 3 MINUTES
S. T.+ 1°F
SET TEMP. T°F
(S.T.)
THERMO ON
THERMO OFF
THERMO ON
THERMO OFF
OFF
MORE THAN
3 MINUTES
5 MINUTES
OFF
ON
ON
ON
COMPRESSOR
INDOOR FAN
SET SPEED (MANUAL)
ON
OFF
ON
OFF
ON
OUTDOOR FAN
1028_X_S
Fig. 8
Chart Summary and Explanations
❑
❑
❑
Once the compressor starts, it keeps running for 5 minutes.
Once the compressor stops, it will not start running again for 3 minutes.
If you change the operation mode during the cooling cycle, the control circuit stops the
compressor for 3 minutes.
❑
❑
For 5 minutes after the compressor is first turned on, and for 3 minutes after it is turned off,
the compressor is not controlled by the room sensor.
Thermo ON: When room temperature rises 1 °F above the set temperature T˚, (T ˚+1 °F):
Compressor ➞ ON
❑
Thermo OFF: When the room temperature is equal to or below the set temperature T˚:
Compressor ➞ OFF
SM830079
– 27 –
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10. PROCESSES AND FUNCTIONS
(2) Freeze Prevention
Freeze Prevention keeps the indoor heat exchange coil from freezing. Freezing reduces the
efficiency of the unit, and frost buildup on the coil blocks cool air circulation from the indoor
unit’s fan.
FREEZE
PREVENTION
FREEZE
PREVENTION
MORE THAN 10 MINUTES 6 MINUTES
10 MINUTES
6 MINUTES
INDOOR COIL
TEMPERATURE
(THERMO ON)
30°F
(THERMO OFF)
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
COMPRESSOR
OUTDOOR FAN
INDOOR FAN
SET SPEED
1029_X_S
Fig. 9
(3) Drain Pump Control
Drain pump operates when compressor starts to operate or when Float Switch turns off.
FLOAT SWITCH
ON
ON
OFF
ON: low water level
OFF: high water level
20 MINUTES
OFF
COMPRESSOR
DRAIN PUMP
OUTDOOR FAN
INDOOR FAN
ON
ON
ON
ON
OFF
OFF
OFF
ON
ON
ON
ON
OFF
SET SPEED
0609_X_S
Fig. 10
SM830079
– 28 –
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10. PROCESSES AND FUNCTIONS
(4) Outdoor Fan Speed Control (CL1852)
Low ambient fan speed control
• This function protects the compressor from being damaged due to flowback of the
liquid refrigerant to the compressor when the outdoor temperature is very low.
• When the air temp. thermistor (TH) on the outdoor units detects a change in tem-
perature, the controller on the electrical component box activates to control the
fanspeed automatically.
• If the outdoor temperature falls below 57°F, the fan speed switches to MED.
• If the outdoor temperature falls below 30°F, the fan speed switches to LOW.
1
2
*
*
Fan motor output
Fan speed
HIGH
3 – 1 (BLU–GRY) or (WHT–GRY)
5 – 1 (VLT–GRY)
57°F
Outdoor
temperature
MEDIUM
LOW
30°F
7 – 1 (YEL–GRY)
(Line voltage 115V or 230V)
1893_M_I
Fig. 11
*1 Regardless of outdoor temperature, outdoor fan motor operates at first at HIGH
speed for 23 ± 5 seconds to give the motor an initial boost.
*2 When the fan speed switches, the controller terminal’s location where line voltage
comes out (ࠗ–ࠗ) shifts accordingly.
SM830079
– 29 –
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11. SERVICE PROCEDURES
(1) Troubleshooting
1) Check before and after Troubleshooting
Many problems may happen because of wiring or power supply problems, so you
should check these areas first. Problems here can cause false results in some of the
other tests, and so should be corrected first.
1 Check power supply wiring
(a) Single-phase
❑ Check that power supply wires are correctly connected to terminal No. 1
through No. 4 on the 4P terminal plate in the indoor unit and No. 5 and No.
6 on the 6P terminal in the outdoor unit.
2 Check inter-unit wiring
❑ Check that inter-unit control wiring (AC 230 - 208 V Line voltage) is cor-
rectly connected between the indoor unit and outdoor unit.
Single-phase outdoor unit
INDOOR
OUTDOOR UNIT
14 AWG
(Inter-unit)
Power lines
INDOOR UNIT
B
230/208 V
230/208 V
230/208 V
1
2
3
1
Fuse
2
3
4
A
Disconnect
switch
L1
5
(Field supply)
L2
6
G
G
Grounding
line
1306_M_I
Fig. 12
3 Check power supply
❑ Check that voltage is within the specified range (±10 % of the rating).
❑ Check that power is being supplied.
If the following troubleshooting must be done with power being supplied, be
careful not to touch any uninsulated live part that can cause ELECTRIC
SHOCK.
4 Check the lead wires and connectors in indoor and outdoor units.
❑ Check that the sheath of lead wires is not damaged.
❑ Check that the lead wires are firmly connected at the terminal plate.
❑ Check that the wiring is correct.
5 Reference
•
Condition of general cooling operation (Thermo. ON)
SWEEP .................. ON
Indoor fan speed .... HIGH
SM830079
– 30 –
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11. SERVICE PROCEDURES
2) Air Conditioner does not Operate
1 Circuit breaker trips (or fuse blows).
(a) When the circuit breaker is set to ON, it is tripped soon.
• There is a possibility of ground fault.
• Check insulation resistance.
If resistance value is 1 MΩ or less, it is a defect of insulation.
(Example)
1
2
3
Outdoor
unit
Indoor
unit
4
6
5
1
2
3
1
2
3
Circuit
breaker
Power
supply
cords
G
G
Inter-unit
power line
Ground
*Set the circuit breaker to OFF.
1
Remove power supply cords
from the terminal plate in
the outdoor unit.
NO
Execute
rewiring.
• Check insulation resistance
of power supply cords.
OK
Remove inter-unit power line
from the terminal plate in
the outdoor unit.
• Check insulation resistance
of outdoor unit.
2
• Check insulation
resistance of
electrical parts
in the outdoor unit.
NO
Insulation of
outdoor unit
is defective.
OK
3
Remove inter-unit power line
from the terminal plate in
the indoor unit.
NO
• Check insulation
resistance of
electrical parts
in the indoor unit.
Insulation of
indoor unit
is defective.
• Check insulation resistance
of indoor unit.
OK
Inter-unit power lines are
defective.
Execute
rewiring.
1334_X_S
SM830079
– 31 –
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11. SERVICE PROCEDURES
(b) Circuit breaker trips in several minutes after turning the air conditioner on.
• There is a possibility of short circuit.
• Check capacity of circuit
breaker.
Replace it with a
suitable one.
(= larger capacity)
NO
Is capacity of circuit
breaker sufficient ?
• Check resistance of
outdoor fan motor winding.
• Check resistance of
compressor motor winding.
0614_X_S
2 Neither indoor unit nor outdoor unit runs.
A. Power is not supplied
Circuit breaker
is tripped.
Reset the breaker.
• Check power supply.
Is power being supplied
to outdoor unit ?
NO
Wait for recovery
or consult power
supply company.
Power failure.
0615_X_S
B. Check remote control unit.
• Try to run both indoor and
outdoor units with another
remote control unit.
NO
Refer to item C.
OK
The other remote control
unit is defective.
0616_X_S
SM830079
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11. SERVICE PROCEDURES
C. Check “Operation selector” switch in the indoor unit.
• Has “Operation selector”
switch been set to ON
position ?
IND. LAMP Ass’y or P.C.B.
Ass’y in the indoor unit
is defective.
YES
NO
Set “Operation selector”
switch to ON.
But neither unit runs.
Switch Ass’y or P.C.B.
Ass’y in the indoor unit
is defective.
0617_X_S
D. Transformer in indoor unit.
• Check resistance of
transformer winding. (TR1)
1033_X_S
E. Check. auxiliary relay.
• Check coil resistance of
auxiliary relay.
(RY1-RY5)
1894_X_I
SM830079
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11. SERVICE PROCEDURES
F. Check indoor fan motor thermal protector (49FMI)
• Disconnect the socket from 9P (WHT) connector.
• Check the continuity
between No. 8 and No.9
poles of the 9P socket.
No continuity.
The thermal protector (49FMI)
is operated.
Check fan casing
Remove foreign
matter or repair.
Fan cannot
be rotated.
for foreign matter
on the inside.
• Check fan rotation.
Rotate the fan gently once
or twice by hand.
Fan motor burnout
or foreign matter
in bearing.
OK
Repair or replace.
0621_X_S
• Check fan motor capacitor.
G. Check fuse on the P.C.B. Ass’y in the indoor unit.
• Check fuse on the P.C.B.
Ass'y in the indoor unit
for continuity.
• Check resistance of drain
pump winding. (DP)
OK
When the fuse blows.
• Check coil of compressor
motor magnetic contactor.
(PR)
• Check transformer. (TR1)
OK
OK
• Check resistance of indoor
fan motor winding.
(FMI)
• P.C.B. Ass'y is defective.
OK
• Check resistance of louver
motor winding.
(LM)
OK
1895_X_S
SM830079
– 34 –
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11. SERVICE PROCEDURES
3) Outdoor Unit does not Run.
A. Check COOL / FAN selector switch in the remote control unit.
• Is COOL/FAN selector switch
set to COOL ?
NO
Set to COOL.
0623_X_S
B. Check set temperature.
Try to lower set
temperature by Temperature
setting button “COOLER”.
YES
• Set “Operation selector”
switch to TEST in the
indoor unit.
Outdoor unit runs.
Is room temperature too
low ?
NO
• Try to run both indoor and
outdoor units with another
remote control unit.
OK
The other remote control
unit is defective.
(Room sensor in the remote
control unit is defective.)
0624_X_S
SM830079
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11. SERVICE PROCEDURES
C. Check compressor motor magnetic contactor.
• Check coil resistance of
compressor motor magnetic
contactor.
(PR)
1896_X_S
E. Check outdoor unit P.C.B.
(CL1822 Type)
D .Check indoor unit P.C.B.
• Check P.C.B. Ass’y.
• Check P.C.B. Ass’y.
• Check voltage between
terminals No.1 and No.2 at
terminal plate.
• Check voltage between
terminals No.5 and No.6 at
terminal plate.
No voltage appears.
No voltage appears.
P.C.B. Ass’y is defective.
P.C.B. Ass’y is defective.
1897_X_S
1335_X_S
F. Check float switch.
• Refer to “11. (3) Drain Pump Control”
NO (Wait for 20 minutes.)
Is drainage prevented from
flowing ?
YES
• Check drain hose.
• Check float switch (FS).
0629_X_S
SM830079
– 36 –
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11. SERVICE PROCEDURES
4) Indoor Unit does not Run.
(Indoor fan and louver motor do not run.)
P.C.B. Ass’y is defective.
0630_X_S
5) Some Part does not Operate.
A. Indoor fan does not run.
Check fan casing
for foreign matter
on the inside.
Remove foreign
matter or repair.
Fan cannot
be rotated.
• Check fan rotation.
Rotate the fan gently once
or twice by hand.
Fan motor burnout
or foreign matter
in bearing.
Repair or replace.
• Check resistance of fan
motor winding.
OK
• Check fan motor capacitor.
OK
Relay RY1 or RY2 on the
P.C.B. Ass’y is defective.
0631_X_S
B. Louver motor does not run.
• Check resistance of
louver motor winding.
OK
P.C.B. Ass’y or remote
control unit is defective.
0632_X_S
SM830079
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11. SERVICE PROCEDURES
6) Outdoor Fan does not Run.
• Check fan casing
for foreign matter
on the inside.
Remove foreign
matter or repair.
Fan cannot
be rotated.
• Check fan rotation.
Rotate the fan gently once
or twice by hand.
• Fan motor burnout
or foreign matter
in bearing.
Repair or replace.
• Check resistance of fan
motor winding.
OK
• Check fan motor capacitor
• Check continuity between
terminals on the compressor
motor magnetic contactor.
0633_X_S
7) Outdoor Fan does not Run for CL1852.
• Check fuse on PCB Ass’y in
outdoor unit for continuity.
If fuse blows,
• Check resistance of primary
winding of transformer.
(TR)
1038_X_S
8) Compressor does not Run.
• Check compressor motor capacitor
(RC1).
Wait for 30 minutes until com-
pressor has cooled.
OK
Compressor runs.
• Check resistance of compressor
motor winding.
Compressor internal thermal
protector is operated.
• Check power supply voltage.
Is voltage abnormally low?
NO
• Is outdoor heat exchanger coil dirty
or are there obstacles near air
suction inlet?
1336_X_S
SM830079
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11. SERVICE PROCEDURES
9) Poor Cooling
Check installation position
of remote control unit.
• Does cool air from air condi-
tioner reach remote control
unit directly ?
Change installation
position of remote
control unit.
YES
NO
Insulate wide tube and
then execute taping with
narrow tube.
• Is wide tube between indoor unit
and outdoor unit insulated ?
YES
Temperature
difference
is small.
Possibility of
refrigerant
shortage.
Charge
refrigerant
(R22).
• Measure temperatures of suction
and discharge air of indoor unit.
Temperature difference between
suction and discharge air is
large enough (Approx. 10 deg. or more).
• Check clogging of air
filter.
Clean filter.
Air filter is clogged.
YES
Set fan speed to either
HIGH or MEDIUM.
• Is fan speed set to LOW ?
• Review cooling load estimate,
if performance of air conditioner
is normal.
Reduce cooling load or
replace the unit with
higher cooling capacity.
1040_X_S
10) Excessive Cooling.
Set the temperature to
higher value using
temperature setting
button of the remote
control unit.
YES
NO
• The set temperature is too low.
• Is the remote control unit installed
at a place where it can
detect the room temperature
properly ?
Change installation
position of the remote
control unit.
0637_X_S
SM830079
– 39 –
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11. SERVICE PROCEDURES
(2) A Sensor is Defective
1 Indoor (heat exchanger) coil temp. Sensor is defective.
(a) Open (=No continuity in sensor)
Compressor and outdoor fan repeat ON for 10 minutes and OFF for 6 minutes
when sensor opens.
(b) Short
“Freeze Prevention” does not operate when dehumidified water is frozen on the
indoor coil.
2 Room temp. Sensor (in the remote control unit) is defective.
(a) Open (=No continuity in sensor)
Neither outdoor fan nor compressor runs.
(b) Short
Outdoor fan and compressor do not stop. — Excessive cooling.
(3) Operation of Major Electrical Parts
Operation
Oudoor unit
Operation Mode
(Function)
Indoor unit and Remote Control unit
Indicator lamps
Fan Compressor
Fan
Room
Temp.
Night setback
Cool Timer
Sweep
Energy saver
Thermo.ON
Thermo.OFF
Thermo.ON
Thermo.OFF
ON Timer
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
Manual
Night
⅜
⅜
Cool
-ing
setback
Timaer
(set)
OFF Timer
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
⅜
Freeze prevention
Fan
Cool
⅜*
⅜*
⅜*
⅜*
Sweep
Fan
Flap
Cool
Stop
⅜*
⅜*
⅜*
⅜*
Fan
NOTE ⅜* Refer to Cooling Mode.
SM830079
– 40 –
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11. SERVICE PROCEDURES
Earthed wire
(4) Checking the Electrical Components
Clip
1) Measurement of Insulation
Resistance
•
The electrical insulation is acceptable
Probe
when the resistance exceeds 1 MΩ.
Insulation
tester
Fig. 13
0638_X_S
1 Power Supply Wires
Terminal plate
Clamp the earthed wire of the Power
Supply wires with a lead clip of the
insulation resistance tester and mea-
sure the resistance by placing a probe
on either of the power wires. (Fig. 13)
Probe
Then measure the resistance between
the earthed wire and the other power
wires. (Fig. 13)
2 Indoor Unit
Clip
Clamp an aluminum plate fin or copper
tube with the lead clip of the insulation
resistance tester and measure the
resistance by placing a probe on the
terminal plate (Fig. 14)
Copper
tube or
metallic part
Insulation
tester
Fig. 14
0639_X_S
3 Outdoor Unit
Probe
Measure the resistance by placing a
probe on the terminal plate in the same
manner as explained above 2. (Fig. 14)
Clip
4 Measurement of Insulation Re-
Copper
tube or
metallic part
sistance for Electrical parts
• Disconnect the connector of the
desired electric part from terminal
plate, P.C.B. Ass’y, etc. (Fig. 15)
Insulation
tester
Fig. 15
0640_X_S
•
Similarly, disconnect the lead wires from
compressor, capacitor, etc. (Fig. 16)
From fan motor,
compressor and other
parts.
• Measure the resistance in the same
manner as illustrated on the right.
Probe
Metallic
part
Refer to Electrical Wiring Diagram.
Clip
NOTE
If the probe does not enter the hole
because the hole is too narrow, use a
probe with a thinner pin.
Insulation
tester
Fig. 16
0641_X_S
SM830079
– 41 –
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11. SERVICE PROCEDURES
2) Checking the Protective Devices
• Disconnect the connector, which consists of P (plug) and S (socket) when you want to check the
protective device.
• Then check continuity among plug’s (and/or socket’s) terminal as in Fig. 17.
• Normality of the protective device can be judged by the following table.
The Protective Device is proved normal if there is a continuity between terminals.
socket
Multimeter
Ω
Fig. 17
0642_X_S
1 Indoor fan motor thermal protector (49FI) . . . . . . Indoor unit
• Disconnect the connector which leads to the indoor fan motor (FMI).
• Check the socket’s terminals.
2 Compressor motor thermal protector . . . . . . Outdoor unit
• Disconnect the wires from terminals of compressor.
• Check the terminals of compressor.
3 Outdoor fan motor thermal protector (49FO) . . . . . . Outdoor unit
• Disconnect both the connector which leads to the outdoor fan motor (FMO).
• Check socket’s terminal.
SM830079
– 42 –
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11. SERVICE PROCEDURES
3) Checking the Electrical Parts
1 Power transformer (TR1) ................. Indoor unit
*Measure the coil resistance.
• Primary 230-208 V ; Measure the resistance between two WHT lead wire terminals
of socket connected to power transformer.
• Secondary 10.6 V ; Measure the resistance between two BRN lead wires.
Refer to “2. (3) (A) Other component specifications”.
2 Power transformer (TR) ................. Outdoor unit *Measure the coil resistance.
• Primary 230-208 V ; Measure the resistance between two WHT lead wire terminals
of socket jointed to power transformer.
• Secondary 19 V
; Measure the resistance between two BRN lead wires.
Refer to “2. (3) (B) Other component specifications”.
3 Indoor fan motor (FMI) ............... Indoor unit
*Measure the coil resistance.
• Measure the resistance between each terminal of the socket connected to the
indoor fan motor.
Refer to “2. (2) (A) Major component specifications”.
4 Outdoor fan motor (FMO) ........... Outdoor unit
• Measure the resistance in the same manner as explained above 2.
Refer to “2. (2) (B) Major component specifications”.
*Measure the coil resistance.
5 Motor capacitor ............ Both in indoor and outdoor unit
• Remove the lead wires from the
capacitor terminals, and then place a
probe on the capacitor terminals as
shown in Fig. 18. Observe the deflec-
tion of the pointer, setting the resis-
tance measuring range of the multim-
eter to the maximum value.
Multimeter
• The capacitor is “good” if the pointer
bounces to a great extent and then
gradually returns to its original posi-
tion.
Ω
NOTE
The range of deflection and the deflection
time differ according to the capacity of the
capacitor.
Compressor motor
capacitor
Fan motor
capacitor
1041_X_S
Fig. 18
SM830079
– 43 –
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11. SERVICE PROCEDURES
6 Continuity of fuse on P.C.B.
Ass’y
• Check for continuity using a multim-
eter as shown in Fig. 19.
Fuse
NOTE
Method Used to Replace Fuse on
PCB Ass’y
1042_X_S
1. Remove the PCB Ass’y from the
electrical component box.
Fig. 19
Soldering iron
2. Remove the fuse from PCB Ass’y
using pliers while heating the sol-
dered leads on the back side of the
PCB Ass’y with a soldering iron (30W
or 60W). (Fig. 20)
PCB Ass’y
Fuse
Varistor
3. For replacement, insert a fuse of the
same rating to the intended position
and solder it.
(Allow time to radiate heat during sol-
dering so that the fuse does not melt.)
Pliers
1043_X_S
When replacing the
fuse, be sure not to
break down the
Fig. 20
CAUTION
varistor.
4) Thermistor Characteristic Curve
1 Coil sensor
1 Room temp. sensor
(PBC-41E)
(KTEC-35)
40
35
10
9
8
7
6
5
4
3
2
1
30
25
20
15
10
5
0
–4
5
14
23
32
41
50
59
68
Temperature (°F)
1045_M_I
50
59
68
77
86
95 104
Temperature (°F)
1044_M_I
SM830079
– 44 –
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• The specifications, designs, and information in this brochure are subject to change without notice.
SANYO FISHER Service Company
CENTRAL REGION
1739 Sands Place, Suite G
Marietta, GA 30067
Phone: (770) 951-8284
Fax: (770) 951-2077
Sep. / ’2000
Printed in U.S.A.
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