These air conditioners employ new
refrigerant R410A.
Pay special attention when
servicing the unit.
CH0971
CH1271
REFERENCE NO. SM700647-06
Important!
Please Read Before Starting
This air conditioning system meets strict safety and operating
standards. As the installer or service person, it is an
important part of your job to install or service the system so it
operates safely and efficiently.
For safe installation and trouble-free operation, you must:
Carefully read this instruction booklet before beginning.
Follow each installation or repair step exactly as shown.
Observe all local, state, and national electrical codes.
Pay close attention to all warning and caution notices given
in this manual.
This symbol refers to a hazard or
WARNING
CAUTION
If Necessary, Get Help
These instructions are all you need for most installation
sites and maintenance conditions. If you require help for
a special problem, contact our sales/service outlet or
your certified dealer for additional instructions.
In Case of Improper Installation
The manufacturer shall in no way be responsible for
improper installation or maintenance service, including
failure to follow the instructions in this document.
SPECIAL PRECAUTIONS
unsafe practice which can result
in severe personal injury or death.
This symbol refers to a hazard
or unsafe practice which can
result in personal injury or
product or property damage.
When Transporting
Be careful when picking up and moving the indoor and
outdoor units. Get a partner to help, and bend your knees
when lifting to reduce strain on your back. Sharp edges or thin
aluminum fins on the air conditioner can cut your fingers.
When Installing
In a Ceiling or Wall
Make sure the ceiling/wall is strong enough to hold the unit’s
weight. It may be necessary to construct a strong wood or
metal frame to provide added support.
In a Room
Properly insulate any tubing run inside a room to prevent
"sweating" that can cause dripping and water damage to walls
and floors.
In Moist or Uneven Locations
Use a raised concrete pad or concrete blocks to provide a
solid, level foundation for the outdoor unit. This prevents
water damage and abnormal vibration.
In an Area with High Winds
Securely anchor the outdoor unit down with bolts and a metal
frame. Provide a suitable air baffle.
In a Snowy Area (for Heat Pump-type Systems)
Install the outdoor unit on a raised platform that is higher than
drifting snow. Provide snow vents.
When Connecting Refrigerant Tubing
•
Use the flare method for connecting tubing.
•
Apply refrigerant lubricant to the matching surfaces of the
flare and union tubes before connecting them, then tighten
the nut with a torque wrench for a leak-free connection.
•
Check carefully for leaks before starting the test run.
When Servicing
WARNING
•
Do not supply power to the unit until all wiring and tubing
are completed or reconnected and checked.
•
Highly dangerous electrical voltages are used in this
system. Carefully refer to the wiring diagram and these
instructions when wiring. Improper connections and
inadequate grounding can cause accidental injury or death.
•
Ground the unit following local electrical codes.
•
Connect all wiring tightly. Loose wiring may cause
overheating at connection points and a possible fire
hazard.
When Wiring
ELECTRICAL SHOCK CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH.
ONLY A QUALIFIED, EXPERIENCED
ELECTRICIAN SHOULD ATTEMPT TO
WIRE THIS SYSTEM.
•
Turn the power off at the main power box (mains) before
opening the unit to check or repair electrical parts and
wiring.
•
Keep your fingers and clothing away from any moving parts.
•
Clean up the site after you finish, remembering to check
that no metal scraps or bits of wiring have been left inside
the unit being serviced.
Others
CAUTION
Ventilate any enclosed areas when installing or testing the
•
refrigeration system. Escaped refrigerant gas, on contact
with fire or heat, can produce dangerously toxic gas.
Confirm upon completing installation that no refrigerant gas
•
is leaking. If escaped gas comes in contact with a stove,
gas water heater, electric room heater or other heat source,
it can produce dangerously toxic gas.
9-1.Precautions before Performing Inspection or Repair
9-2.Method of Self-Diagnostics
9-3.Checking the Indoor and Outdoor Units
9-4.Trouble Diagnosis of Fan Motor
9-5.Noise Malfunction and Electromagnetic Interference
10-1. Measurement of Insulation Resistance
10-2. Checking Continuity of Fuse on PCB Ass'y
11. REFRIGERANT R410A:
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
11-1. Characteristics of New Refrigerant R410A
11-2. Checklist before Servicing
11-3. Tools Specifically for R410A
11-4. Tubing Installation Procedures
11-5. In Case of Compressor Malfunction
11-6. In Case Refrigerant is Leaking
11-7. Charging Additional Refrigerant
11-8. Retro-Fitting Existing Systems
Because capillary tubing is used in the outdoor unit, both the
wide and narrow tubes of this air conditioner become cold. To
prevent heat loss and wet floors due to dripping of
condensation, both tubes must be well insulated with a
proper insulation material. The thickness of the insulation
should be a min. 5/16"(8 mm).
After a tube has been insulated,
CAUTION
never try to bend it into a narrow
curve because it can cause the tube
to break or crack.
15
Thickness:
Min. 5/16"(8 mm)
Wide tube
Insulation
Thickness:
Min. 5/16"(8 mm)
Narrow tube
5. PERFORMANCE DATA
5-1. Temperature Charts
Indoor UnitKHS0971Outdoor UnitCH0971
Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 115V)
(1) Low pressure performance chart
173
(1.2)
159
(1.1)
psig(MPaG)
145
(1.0)
Indoor Air Temp.86
Indoor Air Temp.86°F (30°C)
131
(0.9)
117
Low pressure at wide tube service valve
(0.8)
-4
(-20)
5
(-15)
14
(-10)
23
(-5)
(2) Operating current performance chart
9
32
(0)
41
(5)
50
(10)
Outdoor inlet air D.B. temp.°F(°C)
59
(15)
68
(20)
F (
°
°F (
80
80
F (
°F (
°
75
75
Hi FanLo fan
C)
°
30
F (
°
C)
°
°C)
27
27
C)
°C)
°
24
24
77
(25)
86
(30)
95
(35)
104
(40)
8
7
6
Operating current (A)
5
4
-4
(-20)
5
(-15)
14
(-10)
23
(-5)
(3) Indoor discharge air performance chart
64.4 (18)
°C)
60.8 (16)
57.2 (14)
53.6 (12)
50.0 (10)
32
(0)
41
(5)
50
(10)
Outdoor inlet air D.B. temp.°F(°C)
Indoor Air Temp.86
Indoor Air Temp.86°F (30°C
59
(15)
68
(20)
Indoor Air Temp.86
Indoor Air Temp.86°F (30°C)
80
80
75
75
Hi FanLo fan
)
C)
°
30
F (
°
C)
°
°C)
27
27
F (
°
°F (
C)
80
80
°
°C)
24
24
F (
°
°F (
75
75
F (
°
°F (
F (
°F (
°
77
(25)
F (
°
C)
°
°C)
27
27
C)
°C)
°
24
24
86
(30)
C)
°
30
95
(35)
Hi FanLo fan
104
(40)
Indoor discharge air temperature °F(
46.4 (8)
-4
(-20)
5
(-15)
14
(-10)
23
(-5)
32
(0)
41
(5)
50
(10)
59
(15)
68
(20)
77
(25)
86
(30)
95
(35)
Outdoor inlet air D.B. temp.°F(°C)
NOTE
Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
16
104
(40)
Indoor UnitKHS0971Outdoor UnitCH0971
Heating Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 115V)
(1) High pressure performance chart
493
(3.4)
°C)
23
°F(
421
psig(MPaG)
(2.9)
348
(2.4)
276
(1.9)
High pressure at wide tube service valve
(2) Operating current performance chart
Indoor Air Temp.73
23
(
-
5)32(0)41(5)50(10)59(15)68(20)77(25)
Outdoor inlet air D.B. temp.°F(°C)
14
70°F(21
17
°F(
63
°C)
°C)
13
12
11
10
9
Operating current (A)Indoor discharge air temperature °F(°C)
8
7
23
(
-
(3) Indoor discharge air performance chart
140(60)
131(55)
122(50)
113(45)
104(40)
95(35)
86(30)
23°C)
Indoor Air Temp.73
5)32(0)41(5)50(10)59(15)68(20)77(25)
°F(
70°F(21
°F(
63
°C)
°C)
17
Outdoor inlet air D.B. temp.°F(°C)
°C)
23
°F(
Indoor Air Temp.73
70°F(21
°F(
63
°C)
°C)
17
77(25)
23
(
-
5)32(0)41(5)50(10)59(15)68(20)77(25)
Outdoor inlet air D.B. temp.°F(°C)
NOTE
Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in
heating mode. (Refer to "8-2. Overload prevention during heating.")
17
Indoor UnitKHS1271Outdoor UnitCH1271
Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 115V)
(1) Low pressure performance chart
173
(1.2)
159
(1.1)
psig(MPaG)
145
(1.0)
131
(0.9)
117
Low pressure at wide tube service valve
(0.8)
-4
(-20)
5
(-15)
14
(-10)
23
(-5)
(2) Operating current performance chart
13
12
11
10
9
8
7
Operating current (A)
6
5
4
-4
(-20)
5
(-15)
14
(-10)
23
(-5)
32
(0)
41
(5)
50
(10)
Outdoor inlet air D.B. temp.°F(°C)
32
(0)
41
(5)
50
(10)
Outdoor inlet air D.B. temp.°F(°C)
Indoor Air Temp.86°F (30°C)
80
75
59
(15)
59
(15)
68
(20)
Indoor Air Temp.86°F (30°C)
80
75
68
(20)
°F (
°F (
°F (
°F (
Hi FanLo fan
°C)
27
°C)
24
77
(25)
°C)
27
°C)
24
77
(25)
86
(30)
86
(30)
95
(35)
Hi FanLo fan
95
(35)
104
(40)
104
(40)
(3) Indoor discharge air performance chart
64.4 (18)
°C)
86
(30)
Hi FanLo fan
95
(35)
60.8 (16)
57.2 (14)
53.6 (12)
50.0 (10)
Indoor discharge air temperature °F(
46.4 (8)
-4
(-20)
5
(-15)
14
(-10)
23
(-5)
32
(0)
41
(5)
50
(10)
Indoor Air Temp.86°F (30°C)
80
75
59
(15)
68
(20)
°F (
°F (
°C)
27
°C)
24
77
(25)
Outdoor inlet air D.B. temp.°F(°C)
NOTE
Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
18
104
(40)
Indoor UnitKHS1271Outdoor UnitCH1271
Heating Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 115V)
(1) High pressure performance chart
493
(3.4)
psig(MPaG)
421
(2.9)
348
(2.4)
276
High pressure at wide tube service valve
(1.9)
(2) Operating current performance chart
Operating current (A)
°F(
21
°F(
Indoor Air Temp.73
23
(
-
5)32(0)41(5)50(10)59(15)68(20)77(25)
70
17
°F(
63
Outdoor inlet air D.B. temp. °F(°C)
15
14
13
Indoor Air Temp.73
12
°F(
21
°F(
70
17
°F(
63
11
10
9
°C)
23
°C)
°C)
°C)
23
°C)
°C)
8
23
(
-
5)32(0)41(5)50(10)59(15)68(20)77(25)
Outdoor inlet air D.B. temp. °F(°C)
(3) Indoor discharge air performance chart
140(60)
131(55)
122(50)
113(45)
104(40)
95(35)
86(30)
Indoor discharge air temperature °F(°C)
77(25)
23
(
-
5)32(0)41(5)50(10)59(15)68(20)77(25)
Indoor Air Temp.73
Outdoor inlet air D.B. temp. °F(°C)
NOTE
Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in
heating mode. (Refer to "8-2. Overload prevention during heating.")
°C)
23
°F(
°C)
21
°F(
70
°C
17
°F
63
19
5-2. Cooling Capacity
Indoor Unit: KHS0971
Outdoor Unit : CH0971
Power Supply : 115V Single Phase 60Hz
< Cooling Capacity >
RATING CAPACITY: 9,000 BTU/h AIR FLOW RATE:282 CFM
Above data does not take Freeze Prevention Protection during cooling operation into account.
For this reason, the value may vary from the actual cooling characteristics.
3. Above data represents the value when the operation frequency of a compressor is fixed.
20
Indoor Unit: KHS1271
Outdoor Unit : CH1271
Power Supply : 115V Single Phase 60Hz
< Cooling Capacity >
RATING CAPACITY: 11,900 BTU/h AIR FLOW RATE:294 CFM
Above data does not take Freeze Prevention Protection during cooling operation into account.
For this reason, the value may vary from the actual cooling characteristics.
3. Above data represents the value when the operation frequency of a compressor is fixed.
21
5-3. Cooling Capacity (Low Ambient)
Indoor Unit: KHS0971
Outdoor Unit : CH0971
Power Supply : 115V Single Phase 60Hz
< Cooling Capacity (Low Ambient) >
RATING CAPACITY: 9,000 BTU/h AIR FLOW RATE:282 CFM
Above data does not take Freeze Prevention Protection during cooling operation into account.
For this reason, the value may vary from the actual cooling characteristics.
2. Above data represents the value when the operation frequency of a compressor is fixed.
22
Indoor Unit: KHS1271
Outdoor Unit : CH1271
Power Supply : 115V Single Phase 60Hz
< Cooling Capacity (Low Ambient) >
RATING CAPACITY: 11,900 BTU/h AIR FLOW RATE:294 CFM
Above data does not take Freeze Prevention Protection during cooling operation into account.
For this reason, the value may vary from the actual cooling characteristics.
2. Above data represents the value when the operation frequency of a compressor is fixed.
Above data does not take Defrost Operation, Overload Prevention Protection, and/or Cold Air
Prevention Protection during heating operation into account. For this reason, the value may vary
from the actual heating characteristics.
3. Above data represents the value when the operation frequency of a compressor is fixed.
Above data does not take Defrost Operation, Overload Prevention Protection, and/or Cold Air
Prevention Protection during heating operation into account. For this reason, the value may vary
from the actual heating characteristics.
3. Above data represents the value when the operation frequency of a compressor is fixed.