Carrier 42HNR010-713 User manual

FILE NO. SVM-05003-4
42HNR010-713 / 38HNR010-713
42HNR012-713 / 38HNR012-713
SERVICE MANUAL
AIR-CONDITIONER
SPLIT WALL TYPE
Revised on Nov, 2005
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FILE NO. SVM-05003
CONTENTS
1. SPECIFICATIONS
2. CONSTRUCTION VIEWS
2-1 Indoor Unit
2-2 Outdoor Unit
3. WIRING DIAGRAM
4. SPECIFICATION OF ELECTRICAL PARTS
4-1 Indoor Unit
4-2 Outdoor Unit (38HNR012-713)
4-3 Outdoor Unit (38HNR010-713)
5. REFRIGERATION CYCLE DIAGRAM
5-1 42HNR012-713 / 38HNR012-713
5-2 42HNR010-713 / 38HNR010-713
6. CONTROL BLOCK DIAGRAM
7. OPERATION DESCRIPTION
7-1 Outline of Air Conditioner Control
7-2 Description of Operation Circuit
7-3 High-Temperature Limit Control
7-4 Low-Temperature Limit Control
7-5 Defrost Operation
8. INSTALLATION PROCEDURE
8-1 Safety Cautions
8-2 Installation Diagram of Indoor and Outdoor Units
8-3 Installation
8-4 Indoor Unit
8-5 Outdoor Unit
8-6 How to Set Remote Control Selector Switch
8-7 Others
9. TROUBLESHOOTING CHART
9-1 Troubleshooting Procedure
9-2 Basic Check Items
9-3 Primary Judgement
9-4 Self-Diagnosis by Remote Control (Check Code)
9-5 Troubleshooting Flowcharts
9-6 Troubleshooting for Remote Control (Including The Indoor P.C. Board)
3-1 42HNR012-713 / 38HNR012-713
3-2 42HNR010-713 / 38HNR010-713
7-6Current Limit Control
7-7Auto Restart Function
7-8Filter Check Lamp
7-9QUIET Mode
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FILE NO. SVM-05003
11. EXPLODED VIEWS AND PARTS LIST
11-1 Indoor Unit (E-Parts Assy)
11-2 Indoor Unit
11-3 Outdoor Unit (38HNR012-713)
11-4 Outdoor Unit (38HNR010-713)
10. PART REPLACEMENT
10-1 Indoor Unit
10-2 Outdoor Unit
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FILE NO. SVM-05003
42HNR010-713 / 38HNR010-713
42HNR012-713 / 38HNR012-713
ITEM Cooling Heating Cooling Heating
Capacity 220V 240V 220V 240V 220V 240V 220V 240V
kW 3.38 3.42 4.10 4.15 2.65 2.702.95 3.00
Phase 1∅
Power source V 220 – 240
Hz 50
Power consumption kW 1.23 1.27 1.18 1.22 0.93 0.98 0.84 0.86
Power factor %99 97 9896 95929491
Running Indoor A0.15
current Outdoor A5.50 5.30 5.35 5.15 4.30 4.27 3.90 3.77
Starting current A25
Moisture removal lit/h 2.0 1.2
Noise Indoor (H/M/L) dB 41/35/31
Outdoor (220-240V) dB
Refrigerant Name of refrigerant R-22
Rated amount kg 1.00
Refrigerant control Capillary tube
Gas side sizemm ∅12.7
Connection type Flare connection
Liquid side size mm ∅6.35
Interconnection Connection type Flare connection
pipe Maximum length m15*1
(One way)
Maximum height
difference
INDOOR UNIT 42HNR012-71342HNR010-713
Height mm 275
Dimensions Width mm 790
Depth mm 208
Net weight kg 10
Evaporator type Finned tube
Indoor fan type Cross flow fan
High fan m3/h 630 650 570 610
Air volume Medium fan m3/h 520 550 460 520
Low fan m3/h 430 490340 400
Fan motor output W20
Air filter Honeycomb woven filter with PP frame
OUTDOOR UNIT 38HNR012-71338HNR010-713
Height mm 550
Dimensions Width mm 780
Depth mm 270
Net weight kg 3732
Condenser type Finned tube
Outdoor fan type Propeller fan
Airflow volume m3/h 2120 2200 2120 2200 1740 1850 1740 1850
Fan motor output W42 20
Compressor Model PH225X2C-4FT PH180X1C-4D2DN3
Output W1100 750
Safety device Fuse, Overload relay
Louver type Automatic louver
Usable outdoor temperature range °C 21 ~ 43 −10 ~ 24 21 ~ 43 −10 ~ 24
MODEL
19
39/33/26
49 51 49 51 47 49 47 49
0.76
∅9.52
10*1
m65
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-4-
Note : 1
Capacity is based on the following temperature conditions.
Note : 2
Temperature
Condition JIS B8615-1
Cooling Heating
Indoor unit inlet air temperature (DB) 27°C20°C
(WB) 19°C15°C
Outdoor unit inlet air temperature (DB) 35°C7°C
(WB) 24°C6°C
·
FILE NO. SVM-05003
*1 No need to charge extra refrigerant.
*
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FILE NO. SVM-05003
2. CONSTRUCTIONVIEWS
2-1. Indoor Unit
Front panel
Back body
Knock out system
660
275
48 Air outlet
Air inlet Air Filter 790 Heat exchanger
Knock out system
660
48
48
208
64
80590
320
620
235
215 215
9090 150150 160160
26
32 4540 190
275 45
235
120
53
Hanger
Hanger
Hanger
Hanger Hanger
Drain hose (0.54m) Connecting pipe (0.43m)
(Flare ∅6.35)
Connecting pipe (0.33m)
For stud bolt
(∅8~∅10)
For stud bolt (∅6)
Installation plate outline
Center line
Minimum
distance
to ceiling
170or more
Minimum
distance
to ceiling
170or more
65or more
Minimum
distance
to ceiling
Wireless remote control
54 16
135
(For 13 series ; Flare ∅12.7
For 10 series ; Flare ∅9.52)
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FILE NO. SVM-05003
2-2.Outdoor Unit
310
310 302
102
310
302
302
530
265
600
ADetail Drawing (Back Leg)
A
BDetail Drawing (Front Leg)
52
R15
32.5 115 125
R5.5
∅30 Drain outlet
FAN GUARD
36
∅6 Hole
2-∅11x14 Hole
(For ∅8-∅10 anchor bolt)
∅436
4x∅11 Long holes (For ∅8-∅10 anchor bolt)
∅11x14 Hole
∅6 Hole
36
52
310
330
R15
270 600 90
780 62
COVER PV
Electrical
part cover
Liquid side
(Flare ∅6.35)
Gas side
(Flare ∅9.52)
38HNR010-713
Gas side
(Flare ∅12.7)
38HNR012-713
Service port
600 or more 38HNR012-713
A 600 mm 400 mm
B 100 mm 45 mm
38HNR010-713
B or more
A or more
100 or more
325
600
Air inlet
Air outlet
Installation dimension
120
75
54
B
Z
ZView
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FILE NO. SVM-05003
3-1.42HNR012-713 / 38HNR012-713
YEL
CN13
CN07
BLK
GRN&YEL
POWER SUPPLY
SINGLE PHASE
220-240V~,50 Hz
BRW
BLU
GRN&YEL
BLK
RY03 RY04
YEL
BLK WHI RED BLU GRN&YEL
150
GRY BRW
BLK
WHI RED
CR01
CR02
INDOOR
TERMINAL
BLOCK
WHI
T02
C.T
VARISTOR
RY01
4
3
F01
C15
L01
IC03
C58
R48
CN01CN03
THERMO
SENSOR
(TA)
HEAT
EXCHANGER
SENSOR
(TC)
CN10
R46
CR03
D38
C01 R01 DB01
POWER
SUPPLY
CIRCUIT
C02
DC 12V
DC 5V
R21
VARISTOR
MAIN P.C. BOARD
MCC-862
T6.3A
250V
P04
CN04
R22
YEL YEL YEL WHI
CN11
AC FAN MOTOR
INDOOR
OUTDOOR
BLK BLK
135
135
24
24
6
6
3
2
1 4
2 1
3
54
2 1
3
54
PNK
PNK
12
12
1
3
5
1
3
5
12
12
3
3
1
1
2
2
BLK BLK
1
1
2
2
CN27
3
3
1
1
DSA
SG01
R47
Louver motor
CHASSIS
BLK
RED
CAPACITOR
WHI BLK
SOLENOID COIL
BLU
CAPACITOR
FAN
MOTOR
WHI
OUTDOOR
TERMINAL
BLOCK
3
14
(L)
2
(N)
BLU
RED RED
PNK
COMPRESSOR
BLK
73°C
THERMAL FUSE
Power Cord
3. WIRING DIAGRAM
4
BLU
5
BLU
6
BLU
7
BLU
8
BLU
9
BLU
10
BLU
11
BLU
3
1
BLU
2
BLU
4
WHI
5
CN25
6 7 8 9 10 11
3
12
INFRARED RAYS RECEIVE
AND INDICATION PARTS
4 5 6 7 8 9 10 11
3
12
4 5 6 7 8 9 10 11
3
12
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FILE NO. SVM-05003
3-2.42HNR010-713 / 38HNR010-713
BLU BLU BLU BLU BLU BLU BLU BLU BLU BLU WHI
YEL
CN25
CN13
CN07
BLK
GRN&YEL
BRW
RY04
YEL
BLK WHI RED BLU GRN&YEL
150
GRY BRW
BLK
WHI RED
CR01
CR02
INDOOR
TERMINAL
BLOCK
DSA VARISTOR
RY01
4
3
F01
C15
L01
IC03
C58
R48
CN01CN03
THERMO
SENSOR
(TA)
HEAT
EXCHANGER
SENSOR
(TC)
CN10
R46
CR03
D38
C01 R01 DB01
POWER
SUPPLY
CIRCUIT
C02
DC 12V
DC 5V
R21
VARISTOR
MAIN P.C. BOARD
MCC-862
T6.3A
250V
P04 SG01
CN04
R22
YEL YEL YEL WHI
INFRARED RAYS RECEIVE
AND INDICATION PARTS
CN11
AC FAN MOTOR
INDOOR
OUTDOOR
BLK BLK
135
135
24
24
6
6
3
2
1 4
4 5 6 7 8 9 10 11
3
12
4 5 6 7 8 9 10 11
3
12
2 1
3
54
2 1
3
54
PNK
PNK
12
12
1
3
5
1
3
5
12
12
3
3
1
1
2
2
BLK BLK
1
1
2
2
Power Cord
POWER SUPPLY
SINGLE PHASE
220-240V~ , 50 Hz
BLU
GRN&YEL
BLK
RY03
CN27
WHI
T02
C.T
1
3
1
3
R47
Louver motor
CHASSIS
BLK
RED
CAPACITOR
WHI BLK
SOLENOID COIL
BLU
CAPACITOR
FAN
MOTOR
WHI
OUTDOOR
TERMINAL
BLOCK
3
14
(L)
2
(N)
BLU
RED RED
PNK
COMPRESSOR
OVER LOAD RELAY
BLK
73°C
THERMAL FUSE
4 5 6 7 8 9 10 11
3
12
4 5 6 7 8 9 10 11
3
12
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FILE NO. SVM-05003
4. SPECIFICATION OF ELECTRICAL PARTS
4-1. Indoor Unit
No. Parts name Type Specifications
1Fan motor (for indoor) SKF-220-20-4A-1 AC Motor with 150°C thermo fuse
2 Thermo sensor (TA-sensor) ——— 10kΩat 25°C
3Micro Power Module (M01) µRM1260V
4Microcontroller unit (IC30) TMP87CM40AN-5CK9
5 Heat exchanger sensor ——— 10kΩat 25°C
(TC-sensor)
6 Line filter (L01) LC*SS11V-06270 27mH, 600mA
7 Bridge rectifier (DB01) D3SBA60 4A, 600V
8Capacitor (C63)KMH400VSSN47M22S 47µF, 400V
9 Fuse (F01) TSCR6.3A T6.3A, 250VAC
10 Varistor (R21, R22) 15G561K 560V
11 Resistor (R01) RF-2TK5R6 5.6Ω,2W
12 Louver motor MP24Z 12VDC
13 Relay (Comp., RY01) DI1D Rating 25A/AC250V, 3-48VDC
14
15
Relay (Fan, RY03)
Relay (Solenoide, RY04)
G5NB-1A
G5NB-1A
Rating 3A/AC250V, 12VDC
Rating 3A/AC250V, 12VDC
4-2. Outdoor Unit (38HNR012-713)
No. Parts name Type Specifications
Output (Rated) 1100W, 2 poles, 1 phase, 220 – 240V, 50Hz
1Compressor PH225X2C-4FT Winding resistance (Ω)C-R C-S
(at 20°C) 2.35 3.22
Output (Rated) 30W, 6 poles, 1 phase, 220 – 240V, 50Hz
2Fan motor (for outdoor) HF-240-42A Winding resistance (Ω)Red-BlackWhite-Black
(at 20C) 176.2 290.5
Running capacitor
3 DS451155BPQC AC 450V, 1.5µF
(for fan motor)
4Running capacitor DS371356CPNB AC 370V, 35µF
(for compressor)
5Solenoid coil VHV-01A J503C1 AC 220 −240V, 50Hz
(for 4Way valve)
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FILE NO. SVM-05003
No. Parts name Type Specifications
Output (Rated) 750W, 2 poles, 1 phase, 220 −240V, 50Hz
1Compressor PH180X1C-4DZDNB Winding resistance (Ω)C-R C-S
(at 20°C3.33 3.78
Output (Rated) 20W, 6 poles, 1 phase, 220 −240V, 50Hz
2Fan motor (for outdoor) SKF-240-20B or Winding resistance (Ω)Red-BlackWhite-Black
(at 20°C) 387.3 or 235.2 466.2 or 260.1
3Running capacitor DS451155BPQC AC 450V, 1.5µF
(for fan motor)
4-3. Outdoor Unit (38HNR010-713)
4Running capacitor DS371306CPNB AC 370V, 30µF
(for compressor)
5 Overload relay
HF-240-20B
JMRA99269-9200 U/T : 6.8A (90°C), OPEN : 135 ± 5°C, CLOSE : 69 ± 1°C
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FILE NO. SVM-05003
5. REFRIGERATION CYCLE DIAGRAM
5-1.42HNR012-713 / 38HNR012-713
Heat exchanger
Indoor unit
Cross flow fan
Cooling Heating
4-way valve
Heating Cooling Compressor
Accumulator
Heat exchanger
Propeller fan
Outdoor unit
Capillary tube
∅1.0 x 800s
Capillary tube
∅1.5 x 900s
PH225X2C-4FT
Cooling
Heating Mark ( ) means check points of Gas Leak.
O.D.:12.7 mm O.D.:6.35 mm
Cooling
Heating
Packed valve
(∅12.7) Packed valve
(∅6.35)
0.39 m
(Connecting pipe) 0.49 m
(Connecting pipe)
T1
P
Refrigerant
R22 : 1.00 kg.
∅12.7 ∅6.35
Ambient temp.
conditions DB/WB
(°C)
Indoor Outdoor
Standard 1.81 46.0 High 20/15 7/6
Heating Overload*1 2.00 ~ 2.42 52.0 ~ 59.0 Low 27/–24/18
Low temperature 1.50 38.0 High 20/––10/–10
Standard 0.49 10.0 High 27/19 35/24
Cooling Overload 0.60 15.0 High 32/23 43/26
Low temperature 0.45 2.0 Low 21/15 21/15
Standard
pressure
P
(MPaG)
Surface temp. of heat
exchanger interchanging
pipe
T1
(°C)
Fan speed
(indoor)
50Hz
Note
•Measure the heat exchanger temperature at the center of U-bend.(By means ofTC sensor)
*1 •During heating overload operation, a value for the high temperature limit control operation is included.
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–12 –
FILE NO. SVM-05003
5-2.42HNR010-713 / 38HNR010-713
Indoor unit
Cross flow fan
Cooling Heating
4-way valve
Heating Cooling Compressor
Heat exchanger
Propeller fan
Outdoor unit
PH180X1C-4DZDN3
Cooling
Heating Mark ( ) means check points of Gas Leak.
O.D.:9.52 mm O.D.:6.35 mm
Cooling
Heating
Packed valve
(∅9.52) Packed valve (∅6.35)
0.39 m
(Connecting pipe)
∅9.52
0.49 m
(Connecting pipe)
∅6.35
T1
P
Refrigerant
R22 : 0.76 kg.
Capillary tube
∅1.5 x 1000s
Accumulator
Heat exchanger
Ambient temp.
conditions DB/WB
(°C)
Indoor Outdoor
Standard 1.65 40.0 High 20/15 7/6
Heating Overload*1 2.00 ~ 2.40 52.0 ~ 59.0 Low 27/–24/18
Low temperature 1.40 35.0 High 20/––10/–10
Standard 0.50 12.0 High 27/19 35/24
Cooling Overload 0.60 15.0 High 32/23 43/26
Low temperature 0.45 5.0 Low21/15 21/15
Standard
pressure
P
(MPaG)
Surface temp. of heat
exchanger interchanging
pipe
T1
(°C)
Fan speed
(indoor)
50Hz
Note
•Measure the heat exchanger temperature at the center of U-bend. (By means of TC sensor)
*1 •During heating overload operation, a value for the high temperature limit control operation is included.
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FILE NO. SVM-05003
REMOTE CONTROL
6. CONTROL BLOCK DIAGRAM
Heat Exchange sensor
Main Unit Control Panel M.C.U.
Functions Operation
Display
Timer
Display
Filter Sign
Display
PRE DEF
Sign Display
Indoor Fan
Motor
Louver
Motor
Louver
ON/OFF
Signal
Compressor
ON/OFF
Signal
Power Supply
Circuit
Noise Filter Relay Driver, Louver Driver
Relay
RY01
220-240V~, 50Hz Compressor, Outdoor Fan Motor
Initiallizing Circuit
Clock Frequency
Oscillator Circuit
•Louver Control
•3-minutes Delay at Restart
for Compressor
•Processing
(Temperature Processing)
•Motor Revolution Control
•Timer
Thermo. Sensor
Infrared Rays Signal Reciver
Remote Control
Operation (START/STOP)
Operation Mode Selection
AUTO, COOL, DRY, HEAT
Temperature Setting
Fan Speed Selection
ON TIMER Setting
OFF TIMER Setting
Louver Auto Swing
Louver Direction Setting
ECO
Infrared Rays
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7. OPERATION DESCRIPTION
7-1-1. Louver control
(1) Vertical air flow louver
Position of veritcal air flow louver is automatically
controlled according to the operation mode.
Besides, position of vertical air flow louver can be
arbitrarily set by pressing [FIX] button.
The louver position which is set by [FIX] button is
stored in the microcontroller, and the louver is
automatically set at the stored position for the next
operation.
(2) Swing
If [SWING] button is pressed when the indoor unit
is in operation, the vertical air flow louver starts
swinging. When [SWING] button is pressed again,
it stops swinging.
7-1. Outline of Air Conditioner Control
This is a fixed capacity type air conditioner, which uses
AC motor for an indoor fan. The AC motor drive
circuit is mounted in the indoor unit. And electrical
parts which driving the compressor and the outdoor
fan motor, are mounted in the outdoor unit.
−14 −
The air conditioner is controlled by the controller
mounted in the indoor unit. The controller operates all
components based on the commands transmitted from
the remote control and the feedback data of the sensor
is as follow:
•The temperature measurement at the air inlet of
the indoor heat exchanger by the indoor
temperature sensor
•The temperature measurement at the indoor
heat exchanger by the indoor heat exchanger
temperature sensor
•Indoor fan motor operation control
•Louver motor control
•LED display control
•Outdoor fan motor operation control
•Compressor operation control
•Receiving the information of the operation
status and judging the information or the
indication of errors
FILE NO. SVM-05003
•4-WAYS-VALVE operation control
(Heat pump model only)
Cooling UH H M L L- UL SL
OPERATION Dry M L L- UL SL
MODE
Heat UH H M L L- UL SL
rpm13001250120011001000 900800 750 700 650
Air flow volume (m3/h)
630610570520460 400340 310 280 250
42HNR010 Series
Model
42HNR012 Series rpm
Air flow volume (m3/h)
1350 1300
1150
1100 1050 1020950 900 850 750
650 630 550 520 490 470430 400 370 310
800
340
700
280
FAN TAP
Note : Under some function of setting. The fan motor is controlled automatically.
Then LOW+= LOW + MED and MED+ = MED + HIGH
2
Table 7-1-1
2
7-1-2. Indoor fan control (AC Fan motor)
(1) The indoor fan is operated by the stepless speed
change AC motor.
(2) For air flow level, speed of the indoor fan motor is
controlled in three steps (LOW, MED,and HIGH).
If AUTO mode is selected, the fan motor speed is
automatically controlled by the difference between
the preset temperature and the room temperature.
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7-2. Description of Operation Circuit
(1) When turning on the breaker, the operation lamp
blinks.This means that the power supply is on.
(2) When pressing [ ] button on the remote control,
receiving beep sounds from the indoor unit, and
the next operation is performed together with
opening the vertical air flow louver.
(3) Once the operation mode is set, it is memorized in
the microcontroller so that the previous operation
can be effected thereafter simply by pressing
[ ] button.
7-2-1.Cooling operation
([MODE] button on the remote control is set
to the cooling operation.)
(1) The compressor, 4-way valve, outdoor fan and
operation display on the remote control are
controlled as shown in Fig. 7-2-1.
Fig. 7-2-1
(2) When [FAN] button is set to AUTO, the indoor fan
motor operates as shown in Fig. 7-2-2.When
[FAN] button is set to LOW
, MEDor HIGH,
the motor operates with a constant air flow.
NOTE :
*1: The values marked with *1 are calculated and
controlled by the difference in motor speed
between M+ and L-.
Fig. 7-2-2Setting of air flow [FAN:AUTO]
*1
*1
*1
L
+3
°C
+2.5
+2
+1.5
+1
+0.5
-0.5
0
M+
(Room temp.)
−
(Preset temp.)
Preset
temp.
0.5
°C
0
Preset
temp.
ON ON
OFF OFF OFF ON
Compressor
4-way valve
Outdoor fan
OPERATION
display
(Room temp.) (Presettemp.)
-
-
FILE NO. SVM-05003
7-2-2.Dry operation
([MODE] button on the remote control is set
to the dry operation.)
(1) The compressor, 4-way valve, outdoor fan and
operation display on the remote control are
controlled as shown in Fig. 7-2-3.
Fig. 7-2-3
(2) The microcontroller turns the compressor on and
off at the regular intervals (4 to 6 minutes).While
the compressor is turning off, the indoor fan motor
operates in the SUPER LOW position.
The pattern of operation depending on the relation
between room temperature and preset
temperatures is shown in Fig. 7-2-4.
Fig. 7-2-4
Room temp.
Preset temp.+1
Preset temp.
Compressor
Outdoor fan
Indoor fan L
* SL SL
LLSL L
ON ON ON ON
OFF OFF OFF
* Super Low
Preset
temp.
OFF ON
+3
°C
+2
+1
0OFF
4-way valve
Outdoor fan
OPERATION
display
Compressor
ON:6min. OFF:4min.
ON:5min. OFF:5min.
OFF
ON:6min. OFF:4min.
ON:5min. OFF:5min.
(Room temp.) (Preset temp.)
-
(3) [FAN] button on the remote control is set to AUTO
only.
(4) The ECO operations cannot be set.
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- 16 -
7-2-3.Heating operation *Heat pump model only
([MODE] button on the remote control is set
to the heating operation.)
(1) The compressor, 4-way valve, outdoor fan and
operation display on the remote control are
controlled as shown in Fig.7-2-5.
Fig. 7-2-5
(2) When [FAN] button is set to AUTO, the indoor fan
motor operates as shown in Fig. 7-2-6.When
[FAN] button is set to LOW,MED,orHIGH,the motor
operates with a constant air flow.
*1, *2 : The values marked with *1 and *2 are
calculated and controlled by the difference in
motor speed between M+ and L.
Fig. 7-2-6 Setting of air flow [FAN:AUTO]
[FAN AUTO]
-0.5
-1
-1.5
-2
-5.0
-5.5
0
°C
Preset
temp.
M
+
H
L
*1
*2
(Room temp.) (Preset temp.)
0
°C
ON
OFF
ON
OFF
ON ON
4-way valve
Outdoor fan
Compressor
Preset
temp.
OPERATION
display
(Room temp.) (Preset temp.)
-0.5
-
-
FILE NO. SVM-05003
(3) The indoor heat exchanger restricts revolving
speed of the fan motor to prevent a cold draft.The
upper limit of the revolving speed is shown in
Fig. 7-2-7 andTable 7-2-1.
42HNR012 Series
42HNR010 Series
Fig. 7-2-7 Cold draft preventing control
NOTES :
*1: The fan stops for 2 minutes after thermostat-OFF
*2: A is 24°C when the preset temperature is 24°C or
more and A is the preset temperature when it is
under 24°C.
*3: SL means Super Low.
*4: Calculated from difference in motor speed
between SL and H.
A+4
A − 8A+4 A − 8
42
41 34 33
29
28 21 20
*2
*6 *5
Manual
(One of 3 steps)
LH (Up to
seting speed)
AUTO
*4
SL
*3
SL*1
Stop
Indoor heat exchanger temperature
°C
A+4
A − 8A+4 A − 8
46
45 34 33
32
31 21 20
*2
*6 *5
Manual
(One of 3 steps)
L - H (Up to
seting speed)
AUTO
*4
SL
*3
SL*1
Stop
Indoor heat exchanger temperature
°C
-
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17
*5 and *6: Table 7-2-1
Fan *5 *6
speed Starting period Stabilized period
AUTO Up until 12 minutes
passed after starting
the unit
From 12 to 25 minutes
passed after starting
the unit and room
temperature is 3°C
lower than preset
temperature
Manual Room temperature
(L H) < Preset temperature
4°C
7-2-4.Automatic operation
([MODE] button on the remote control is set
to the automatic operation.)
(1) One of 3 operations (Cooling, Fan only or Heating)
is selected according to difference between the
preset temperature and the room temperature at
which the automatic operation has started, as
shown in Fig. 7-2-8.The Fan only operation
continues until the room temperature reaches a
level at which another mode is selected.
(2) Temporary Auto
When the [TEMPORARY] button on the indoor unit
is pushed, the preset temperature is fixed at 24°C
and the indoor unit is controlled as shown in
Fig. 7-2-8.
 From 12 to 25 minutes
passed after starting
the unit and room
temperature is
between preset
temperature and 3°C
lower than preset
temperature
 25 minutes or more
passed after starting
the unit
Room temperature
Preset temperature
3.5°C
Fig. 7-2-8
(Room temp.) (Preset temp.)
°C
+4
0
1
The louver moves to the position same
as Hi POWER operation.
Cooling operation
Heating operation
Cooling operation
Fan only operation
-
-
---
·
·
·
·
··
·
-
-
FILE NO. SVM-05003
7-3.High-Temperature Limit Control
*Heat pump model only
The microcontroller detects the indoor heat exchanger
temperature to prevent pressure of a refrigerating cycle
from increasing excessively.
The compressor and outdoor fan motor are controlled
as shown in Fig. 7-3-1.
Fig. 7-3-1
7-4.Low-Temperature Limit Control
The microcontroller detects the indoor heat exchanger
temperature to prevent the indoor heat exchanger from
freezing.
The compressor and outdoor fan motor are controlled
as shown in Fig. 7-4-1 and 7-4-2.
42HNR012 Series
Fig. 7-4-1
42HNR010 Series
Fig. 7-4-2
7
(°C)
5
Compressor
Heat exchanger
temperature Outdoor fan
ON
Less than 5°C continues
for 5 minutes
OFF
60
(°C)
53
52
Compressor Outdoor fan
OFF
OFF
ON
ON
OFF
ON
Heat exchanger
temp.
6
(°C)
2
Compressor Outdoor fan
ON
Less than 2°C continues
for 5 minutes
OFF
Heat exchanger
temperature
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-18 -
7-5.Defrost Operation *Heat pump model only
During the heating operation, the outdoor heat
exchanger temperature goes down and sometimes it is
frozen.
In this case, the air conditioner stops the heating
operation and starts the defrost operation to melt ice.
7-5-1. Condition to start the defrost operation
The defrost operation starts whichever below
conditions are satisfied.
(1) When the cumulative compressor operating time is
longer than 40 or 90 minutes and difference
between the indoor heat exchanger temperature
and the room temperature is less than the
specified value. (This value is decided by the
microprocessor.) (Control example is shown in
Fig. 7-5-1.In case of B or C, the defrost operation
starts.)
(2) When the current limit control or the high
temperature limit control is performed for total of
90 minutes.
Fig. 7-5-1 (Indoor fan speed : M)
7-5-2. Defrost operation time control
<In case of B>
(1) The heating operation is performed for at least
40 minutes.
(2) The maximum defrost operating time is 6 minutes.
The defrost operating time for the 4th cycle is
10 minutes. (When the outdoor temperature is
very low, however, the defrost operating time is
10 minutes.)
Fig. 7-5-2
DEFROST LAMP :
During defrost operation, the PRE-DEF.lamp is
on and the indoor and outdoor fans are off.
The compressor start protection timer is inter-
looked with the PRE-DEF.lamp.So the PRE-DEF.
Lamp is off (the fans stop) for about 3 minutes
after the [ ] button is turned on.When
the compressor is turned on, the PRE-DEF. lamp
comes on. After the heat ex-changer is preheated
to about 24
°C or higher, the PRE-DEF. Lamp
goes off, and the indoor fan starts.
minutes
40
Heating Heating Heating Heating
Defrost Defrost Defrost Defrost
minutes
40
Max 6 minutes
minutes
40
10 minutes
1 cycle
minutes
40
<In case of C>
(1) The heating operation is performed for at least 90
minutes.
(2) The defrost operating time is 10 minutes.
7-5-3. Ending condition at defrost operation
(1) When the compressor current becomes 7.5A or
more during defrost operation, the defrost
operation stops and the heating operation restarts.
(The current sensor detects the compressor
current.)
(2) The defrost operation continues for at most
6 minutes or 10 minutes.
Indoor heat exchanger temp - Room temp
Cumulative
compressor
operating time
D
BC
A
·
·
FILE NO. SVM-05003
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7-6.Current Limit Control *Heat pump model
only
The microcontroller detects the input current so as to
prevent it exceeds a specified value by means of
controlling the outdoor fan control as described in (1)
and (2).
(1) Current limit control (Cooling operation)
Control is performed as shown below by detecting
the compressor operating current with a current
sensor (C.T).
42HNR012Series/42HNR010Series
Fig. 7-6-1
(2) Current limit control (Heating operation)
Control is performed as shown in Fig. 7-6-2
Fig. 7-6-2
Remark :
1. This function is available only for heat pump model (Cooling models have no a current sensor (C.T.)).
Input current
13.5A / 19.2A
12.5A / 17.8A
10A / 15.6A
9A / 15.0A
Compressor Outdoor fan
More than I4 continues for 3 seconds
OFF
More than I3 continues for 5 seconds
OFF
ON
ON OFF
Input current
13.5A / 19.2A
12.5A / 17.8A
Compressor Outdoor fan
More than I4 continues for 3 seconds
OFF
More than I3 continues for 5 seconds
OFF
ON
FILE NO. SVM-05003
2. For 42HNR010 Series, the value of currents shown on the diagram above are two times the actual
operating value. This is because the lead wire operated two times through the C.T.
I4
I3
I4
I3
I2
I1
42HNR012Series/42HNR010Series
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