Toshiba RAV-SM560XT-E, RAV-SM800XT-E User Manual

FILE NO. SVM-03021
SERVICE MANUAL
AIR-CONDITIONER
UNDER CEILING / CONSOLE TYPE
RAV-SM560XT-E / RAV-SM560AT-E RAV-SM800XT-E / RAV-SM800AT-E
R410A
Sep., 2003
CONTENTS
2. CONSTRUCTION VIEWS ................................................................................................. 4
3. SYSTEMATIC REFRIGERATING CYCLE DIAGRAM ...................................................... 7
4. WIRING DIAGRAM...........................................................................................................9
5. SPECIFICATION OF ELECTRICAL PARTS .................................................................. 12
6. REFRIGERANT R410A ..................................................................................................13
7. CONTROL BLOCK DIAGRAM.......................................................................................21
8. OPERATION DESCRIPTION..........................................................................................22
9. INSTALLATION PROCEDURE....................................................................................... 27
10. TROUBLESHOOTING CHART ...................................................................................... 46
11. DETACHMENTS ............................................................................................................. 60
12. EXPLODED VIEWS AND PARTS LIST.......................................................................... 80
1. SPECIFICATIONS
1-1. Indoor Unit
Model name RAV-SM560XT-E RAV-SM800XT-E
Cooling Heating Average Cooling Heating Average
Standard capacity (Note 1) kW 5.0 5.6 6.7 8.0
(1.5 – 5.6) (1.5 – 6.3) (2.2 – 8.0) (2.2 – 9.0) Heating low temp. capacity (Note 1) (kW) 4.9 5.8 Energy consumption effect ratio (Cooling) 2.67 [D] 3.29 [C] 2.98 2.46 [E] 3.00 [D] 2.73
Power supply 1 phase 220 – 240V 50Hz
Electrical characteristics
Appearance
Outer dimension
Total weight
Heat exchanger Finned tube
Fan unit Standard air flow High (Mid./Low) (m3/h) 800 (680/580) 900(750/550)
Air filter Washable filter Controller (Sold separately) Wireless remote control
Dimensions pipe Liquid side (mm) ∅6.4 (1/4”) ∅9.5 (3/8”)
Sound level High (Mid./Low) (Note 2) (dB•A) 43 39 36 46 42 37
Running current (A) 8.95 – 8.20 8.13 – 7.46 Power consumption (kW) 1.87 1.7 2.72 2.67 (Low temp.) (kW) 2.18 2.29 Power factor (%) 95 95 94 94 Main unit Pure white
Ceiling panel (Sold separately)
Main unit Width (mm) 1093
Ceiling panel (Sold separately)
Main unit (kg) 23 Ceiling panel –––
Fan Multi blade fan
Motor (W) 50
Gas side (mm) ∅12.7 (1/2”) ∅15.9 (5/8”)
Drain port (Nominal dia.) 25 (Polyvinyl chloride tube)
Model ––– Panel color ––– Height (mm) 633
Depth (mm) 208 Height (mm) ––– Width (mm) ––– Depth (mm) –––
13.15 – 12.06 12.91 – 11.84
Note 1 : The cooling capacities and electrical characteristics are measured under the conditions specified by JIS B 8616
based on the reference piping length 7.5 m with 0 meter height.
Note 2 : The sound level is measured in an anechoic chamber in accordance with JIS B8616. Normally, the values
measured in the actual operating environment become larger than the indicated values due to the effects of external sound.
Note : Rated conditions Cooling : Indoor air temperature 27°C DB/19°C WB, Outdoor air temperature 35°C DB
Heating : Indoor air temperature 20°C DB, Outdoor air temperature 7°C DB/6°C WB
– 1 –
• Operation characteristic curve <Cooling> <Heating>
14
12
RAV-SM800XT-E
10
8
6
Current (A)
4
2
0
15
020
RAV-SM560XT-E
• Conditions Indoor : DB27˚C/WB19˚C Outdoor : DB35˚C Air flow : High Pipe length : 7.5m 230V
40 60 70 80 100
Compressor speed (rps)
14
12
10
8
Current (A)
6
4
2
0
15
020
RAV-SM800XT-E
RAV-SM560XT-E
• Conditions Indoor : DB20˚C Outdoor : DB7˚C/WB6˚C Air flow : High Pipe length : 7.5m 230V
40 60 80 90 100
Compressor speed (rps)
• Capacity variation ratio according to temperature <Cooling> <Heating>
105 100
95 90
120 110 100
90 80
85
70
80
60
75 70
Capacity ratio (%)
65 60 55
• Conditions Indoor : DB27˚C/WB19˚C Indoor air flow : High Pipe length : 7.5m
50
32 33 34 35 36 37 38 39 40 41 42 43
50 40
Capacity ratio (%)
30 20 10
0
-14-12-10-8-6-4-20246810
Outsoor temp. (˚C)
• Conditions Indoor : DB20˚C Indoor air flow : High Pipe length : 7.5m
Outsoor temp. (˚C)
–2 –
1-2.Outdoor Unit
Model name Appearance
Power supply
Type
Compressor Motor (kW)
Pole Refrigerant charged (kg) Refrigerant control
Standard length
Max. total length (m) Pipe Over 20m
Outdoor lower (m) Outdoor higher (m)
Outer dimension
Height difference
Height (mm)
Width (mm)
Depth (mm)
RAV-SM560AT-E RAV-SM800AT-E
Silky shade (Muncel 1Y8.5/0.5)
1 phase 230V (220 – 240V) 50Hz
(Power exclusive to outdoor is required.)
Hermetic compressor
1.1 1.6 4 poles
R410A 0.9 R410A 1.5
Pulse motor valve
20 (without additional charge)
30 50
Add 20g/m (Max. 200g) Add 40g/m (Max. 1200g)
15
30 595 795 780 780 270 270
Total weight (kg) Heat exchanger
Fan
Fan unit Standard air flow High (m³/h)
Motor (W)
Connecting pipe
Protection device
Sound level High (Mid./Low) (Note 2) (Cooling/Heating)
Gas side (mm) Liquid side (mm)
(dB•A)
35 55
Finned tube
Propeller fan
2400 3400
43 63
Ø12.7 (1/2”) Ø15.9 (5/8”)
Ø6.4 (1/4”) Ø9.5 (3/8”)
Discharge temp. sensor
Over-current sensor
Compressor thermo.
46/48 48/50
Note 1 : The sound level is measured in an anechoic chamber in accordance with JIS B8616.Nor mally, the values measured in
the actual operating environment become larger than the indicated values due to the effects of external sound.
Note 2 : Rated conditions Cooling :Indoor air temperature 27°C DB/19°C WB, Outdoor air temperature 35°C DB
Heating : Indoor air temperature 20°C DB, Outdoor air temperature 7°C DB/6°C WB
– 3 –
2-1. Indoor Unit
2. CONSTRUCTIONVIEWS
Front panel
1093
208
633
Knock out system
Grille air inlet
Back body
For stud bolt (Ø8 – Ø10)
For stud bolt (Ø6)
200 Min
330165
1093 1015
742 450
20 20
Ø74
UNDER CEILING & CONSOLE INSTALLATION
– 4 –
Installation plate
Mount plate
M10 Suspention bolt
633
460
70 Min
Wireless remote control
Knock out system
160
57 18
2-2.Outdoor Unit (RAV-SM560AT-E)
49.5
521 21
25 220
308
302
Ø6 hole pitch
For anchor bolt)
(Long hole pitch
147
Drain hole (Ø25)
83
A legs
150
11
30
76
153
B legs
Discharge guard
(49.3)
598
593
500 (Fan center dividing)
500 (Fan center dividing)
Protective net mounting hole (2-Ø4 embossing)
Drain hole (2-Ø20 x 88 long hole)
600
115.3 125
30
21
780
115.3
Discharge guide mounting hole (4-Ø4 embossing)
97
2927031
330
21
31
23
132
90.6
Charge port
216
31 134
Valve cover
Earth terminal
43 707 30
Protective net mounting hole (4-Ø4 embossing)
Refrigerant pipe connecting port (Ø12.7 flare at gas side)
600
52 36
R15
302
308 11
Ø11 x 14 U-shape hole
Details of A legs Details of B legs
2-Ø6 hole
Product external line
Ø11 x 14 U­shape holes
308
302
11
Refrigerant pipe connecting port (Ø6.4 flare at liquid side)
Space required for service
2-Ø11 x 14 U-shape holes (For Ø8–Ø10 anchor bolt)
36 52
2-Ø6 hole
Product external line
R15
600
– 5 –
150 or more
365
500 or more
60
475
Suction port
150
or more
Discharge port
600
300 or more
Discharge port
(Minimum distance up to wall)
2-Ø11 x 14 long hole (For Ø8–Ø10 anchor bolt)
2-3.Outdoor Unit (RAV-SM800AT-E)
Knockout (For draining)
21
Suction port
365 17.517.5
40 70
(Long hole pitch
for anchor bolt)
21
565 101
Drain hole (Ø20 x 88 burring hole)
29 90 191 20
Suction port
43
Knockout (For draining)
6026
Discharge port
300150
900
314
Drain hole (Ø25 burring hole)
Part B
40
39
Part A
43
95
Handles (Both sides)
Refrigerant pipe connecting port (Ø9.5 flare at liquid side)
Refrigerant pipe connecting port (Ø15.9 flare at gas side)
2
47
Installation bolt hole (Ø12 x 17 U-shape holes)
17.5 4040
Details of B part
Details of A part
17.5
Installation bolt hole (Ø12 x 17 U-shape holes)
Discharge guide mounting hole (4-Ø4 embossing)
1
60 90
58
27
161
32028
400
264
6760
154
2760
300
Z
307
96
1
Knockout for lower piping
86 7
7 58
Z views
Space required for service
795
2
46
25
85
2
165
60 80
30 45
1
2-Ø12 x 17 U-shape holes (For Ø8–Ø10 anchor bolt)
150 or more
365
500 or more
Suction port
150
or more
Discharge port
600
150 or more
Discharge port
(Minimum distance up to wall)
2-Ø12 x 17 long hole (For Ø8–Ø10 anchor bolt)
– 6 –
3. SYSTEMATIC REFRIGERATING CYCLE DIAGRAM
3-1.RAV-SM560XT-E / RAV-SM560AT-E
Outer diameter of refrigerant pipe
Gas side A Liquid side ∅B
6.4 mm 12.7 mm
Indoor unit
TCJ
sensor
Air heat exchanger
TC sensor
TS sensor
TD sensor
Rotary compressor
(DA130A1F-23F)
4-way valve
(VT7101D)
Muffler
19 x L160
Refrigerant pipe at liquid side Outer dia. ∅B
Packed valve Outer dia. ∅B
TO sensor
Heat exchanger 8 multiple thread ripple 1 row 22 stages FP1.3 flat fin
Outdoor unit
TE sensor
Distributor
Refrigerant pipe at gas side Outer dia. ∅A
Max 30m
Packed valve Outer dia. ∅A
PMV (SKV-18D26)
Strainer
R410A 0.9 kg
Cooling Heating
Pressure Pipe surface temperature (°C)
(MPa) Discharge Suction
Pd Ps (TD) (TS) (TC) (TE) Indoor Outdoor
Standard 3.1 0.9 85 13 10 47 74 HIGH 27/19 35/–
Cooling Overload 3.8 1.0 96 13 12 60 71 HIGH 32/24 43/–
Low load 0.9 0.5 25 7 10 5 28 LOW 18/15.5 –5/– Standard 2.8 0.6 87 3 46 1 87 HIGH 20/– 7/6
Heating Overload 3.3 1.1 78 22 55 16 55 LOW 30.– 24/18
Low load 1.7 0.2 110 –20 26 –22 110 HIGH 0 –20/(70%)
Indoor heat Outdoor heat Indoor
exchanger exchanger fan
Compressor
revolutions per second
(rps)
*
Indoor/Outdoor
temp. conditions
(DB/WB) (°C)
* 4 poles are provided to this compressor.
The compressor frequency (Hz) measured with a clamp meter is 2 times of revolutions (rps) of the compressor.
– 7 –
3-2.RAV-SM800XT-E / RAV-SM800AT-E
Outer diameter of refrigerant pipe
Gas side A Liquid side ∅B
9.5 mm 15.9 mm
TS sensor
Refrigerant pipe at liquid side Outer dia. ∅B
Packed valve Outer dia. ∅B
Strainer
TC sensor
TO sensor
Indoor unit
Air heat exchanger
Outdoor unit
TCJ
sensor
Refrigerant pipe at gas side Outer dia. ∅A
Packed valve Outer dia. ∅A
Modulating (PMV) (SKV-18D26)
Max 50m
PsPd
TD sensor
Strainer
TE sensor
Capillary 3 x 2 x L530
Accumulator (1500cc)
Muffler
4-way valve
(STF-0213Z)
25 x L210
25 x L160
Heat exchanger∅8 1 row 30 stages FP1.3 flat fin
Rotary compressor
(DA220A2F-20L)
R410A 1.5 kg
Cooling Heating
Pressure Pipe surface temperature (°C)
(MPa) Discharge Suction
Pd Ps (TD) (TS) (TC) (TE) Indoor Outdoor
Standard 3.3 0.9 89 8 8 40 64 HIGH 27/19 35/–
Cooling Overload 3.7 1.1 87 17 14 46 45 HIGH 32/24 43/–
Low load 1.0 0.8 22 2 1 1 24 LOW 18/15.5 –5/– Standard 3.3 0.6 93 0 54 0 70 HIGH 20/– 7/6
Heating Overload 3.1 1.1 75 20 52 15 24 LOW 30.– 24/18
Low load 2.0 0.2 90 –26 25 –25 90 HIGH 0 –20/(70%)
Indoor heat Outdoor heat Indoor
exchanger exchanger fan
Compressor
revolutions per second
(rps)
*
Indoor/Outdoor
temp. conditions
(DB/WB) (°C)
* 4 poles are provided to this compressor.
The compressor frequency (Hz) measured with a clamp meter is 2 times of revolutions (rps) of the compressor.
– 8 –
4-1. Indoor Unit
10
10
9
9
8
8
7
7
6
1
LOUVER
MOTOR
6
5
5
4
4
3
3
2
2
1
1
AND INDICATION PARTS
CN25
INFRARED RAYS RECEIVE
WHI BLU BLU BLU BLU BLU BLU BLU BLU BLU
BRW RED ORN YEL PNK BLU
10
9 8 7 6 5 4 3 2 1
CN13
1 2 3 4 5
CN07
10
9 8 7 6 5 4 3 2 1
1 2 3 4 5 66
SWITCH PCB
MCC-1428B
CN101
WHI
CN100
4
5
IC04
R507
R09
R22
SG01
21 3
GRY
GRY
21 3 21
3
DB01
R01
FUSE
250VAC
F01
T6.3A
4. WIRING DIAGRAM
HEAT
EXCHANGER
SENSOR
(TCJ)
FOR FLOAT SWITCH
(OPTION)
When you use float
switch you should cut J401
C02
C15
CN402
POWER SUPPLY
CIRCUIT
C01
R21
3
21
J401
DC12V DC5V
CR502
RY501
MCC-1428A
R405
RY401
CN05
IC03
CR501
C501
CR401
21 21
CN03
21
2
121
2
121
CN01
R506
1
1
2
2
3
3
4
4
5
5
CN10
3
3
2
2
1
1
CN11
3
FOR DRAIN PUMP
2 1
CN401
BLK BLK
BLK BLK
WHI
RED
BLK
BRW GRY YEL
(OPTION)
1
1
2
2
3
3
4
4
5
5
66
3
3
2
2
1
1
THERMO SENSOR (TA)
HEAT EXCHANGER SENSOR (TC)
WHI
RED BLK
BLU PUR GRY
FAN-MOTOR
100”C
Check items
OPERATION
1
indicator Terminal
2
block Fuse
3
6.3A
DC 5V
4
DC 12V
5
BLK
P04
CN30
2
BLK
CN31
WHI
21 3
RED
INDOOR
TERMINAL
BLOCK
CN23
GRN&YEL
SIMPLE CHECK POINTS FOR DIAGNOSING FAULTS
Diagnosis result
Check to see if OPERATION indicator goes on and off when the main switch or breaker is turned on.
Check the power supply voltage between 1 - 2 (Refer to the name plate.) Chack the fluctuate voltage between 2 - 3 (DC15 to 60V)
Check to see if the fuse blows out. (Check the varistor. : R22, R21)
Check the voltage at the No.8 pin on CN13 connector of the infrared receiver. (Check the transformer and the power supply circuit of the rated voltage.)
Check the voltage at the brown lead of the louver motor. (Check the transformer and the power supply circuit of the rated voltage.)
– 9 –
INDOOR
UNIT
OUTDOOR
UNIT
Identification
BRW
RED
GRY
PNK
ORN
GRN&YEL
GRN
PUR
Color
WHI YEL BLU BLK
BROWN
:
RED
:
WHITE
:
YELLOW
:
BLUE
:
BLACK
:
GRAY
:
PINK
:
ORANGE
:
GREEN&
:
YELLOW GREEN
:
PURPLE
:
4-2. Outdoor Unit (RAV-SM560AT-E)
Q200
BLU
P17 P18
P21
P22
P23
RED
WHI
BLK
4
2 1 233 1
CM
COMPRESSOR
CN301
IGBT MODULE
BZBYBXEWBWEVBVEUBU
P.C. BOARD
(MCC-813)
5 5
GRY
4 3
PNK
2 1
YEL
3 3
BLK
2 1 2 1
WHI
RED
2 1
4 3
FM
FAN MOTOR
Q300
CN300
BRW
P19P20
P14
PUR
REACTOR
DB01
CONVERTER MODULE
~
~
+
ELECTRONIC STARTER
– – –
F04 FUSE T3. 15A 250V~
P13
P12
2 1 2 1
+ + +
P11
2
GEA
P10
POWER
RELAY
C12
3
C13 C14
P02
1
TO INDOOR UNIT
REACTOR
ORN
P09
P08 P07
CT
FUSE T25A 250V~
P03
ORN
WHI
2
3
L
POWER SUPPLY 220 to 240 50Hz
2 1 2 1
RELAY
VARISTOR
F01
P01
BLK
N
2 1 2 1
CN600
CN601
CN602
CN603
CN701
P06
SURGE ABSORBER
2
1
THERMOSTAT FOR COMPRESSOR
CN500
TE
11 22
TD
11
22
33
TO
11 22
TS
11
22
33 11
22
33
COIL FOR
11 22 33 44 55 66
BLK YEL RED ORN
RED
GRY
4-WAY VALVE
PMV
PULSE MODULATING VALVE
BLACK (C)
BLK
CN703
TERMINAL OF COMPRESSOR
WHITE (S)
The sign in ( ) is displayed in the terminalcover
RED (R)
Check
items
1
2
3
4
SIMPLE CHECK POINTS FOR DIAGNOSING FAULTS
Diagnosis result
TERMINAL BLOCK There is no supply voltage
(AC220 to 240V) between L - N , 1 - 2 There is no voltage (DC15 to 25V) 2 - 3
FUSE T25A 250V to fuse (F01) blown
T3.15A 250V to fuse (F04) blown
ELECTROLYTIC CAPACITOR VOLTAGE (C12, C13, C14) DC320V not available between
+ – terminal of electrolytic capacitor
INVERTER OUTPUT (Inverter and compressor connector out of position) (Please confirm within six minutes after instructing in the drive.) Voltage between each line of in v erter side conector pins are not equal.
Power supply and connecting cable check
Converter module (DB01) and electrolytic capacitor (C12 to C14) check IGBT module (Q200) check Fan motor check
T25A fuse (F01) check P.C. board and converter module (DB01) check
IGBT module and P.C. board check
– 10 –
Color Identification
BLK BLU RED GRY PNK GRN
BLACK
:
BLUE
:
RED
:
GRAY
:
PINK
:
GREEN
:
WHI BRW ORN YEL PUR
NOTE
CM
: Compressor
PMV
: Pulse modulating valve
FM
: Fan motor
TE
: Heat exchanger Temp. Sensor
TD
: Discharge Temp. Sensor
TO
: Outdoor Temp. Sensor
TS
: Suction Temp. Sensor
IGBT
: Insulated Gate Bipolar Transistor : Converter module
DB01
: Curreut Transformer
CT
: Fan motor driver module
Q300
WHITE
:
BROWN
:
ORANGE
:
YELLOW
:
PURPLE
:
4-3. Outdoor Unit (RAV-SM800AT-E)
THERMOST AT FOR COMPRESSOR
ORN
212
ORN
4-WAY VAL VE COIL
313
3
1
1
FAN MOTOR
5 4
FM
1 3
2 1
6 5
PMV
SUB P.C. BOARD (MCC-1398)
4 3 2 1
SIMPLE CHECK POINTS FOR DIAGNOSING FAULTS
CN500
1
CN700
5 4
CN300
3 232 1
3 2 1
6 5 4 3 2 1
2
CN301
CN702
PHOTO COUPLER
2
CN02
Fan
circuit
CN302
F300 FUSE T5A
CN800
2 31 2 31
Compressor
212
CN604
CN605
CN600
CN601
CN04
CN01
F01 FUSE T3.15A
1
212
GRN
1
3
2
131 212
1
313
1
5 5 5 5 4 4 4 4 3 3 3 3 212
1
212
1
5 5 5 5
4 4 4 4
3 3 3 3
212
1
GRY WHI
BLU YEL
BLK WHI BLU RED PNK
ORN BLK WHI RED
RED
1
CM
TE
TS
TD
TO
REACTOR
TO
INDOOR
UNIT
313
212
212
212
L N2 31
POWER SUPPL Y
220-240V
~50Hz
RED WHI BLK
POWER SUPPLY CIRCUIT (FOR P.C. BOARD)
F04 FUSE
3.15A
CN04
1
CN06
P.C. BOARD
1
(MCC-1359)
CN05
1
1
CN13
F01 FUSE
2
25A
WHITE(S)
+
BU EU BV EV BW EW BX BY BZ
CN09 CN10 CN11
T03 CT
T04 CT
4
2
P20
P10 P11
P13 P12
P09 P08
P15 P14
CN03
BLKWHIRED
P19 P18 P17
G
E A
~ ~
+
REACTOR
212
REACTOR
212
RED(R)
C13
3
C12 C11 C10
POWER RELAY
RY01
R05 R06
T02 CT
VARISTOR
CN02CN01
TERMINAL OF COMPRESSOR
F02
2
FUSE 15A
SURGE ABSORBER
BLACK(C)
IGBT
module
Q200
YEL BLU
Converter
module
DB01
ORN
1
1
BRN
The sign in ( ) is displayed in the terminal cover
Check
items
1
2
3
4
Diagnosis result
TERMINAL BLOCK There is no supply voltage
(AC220 to 240V) between L - N , 1 - 2 There is no voltage (DC15 to 25V) 2 - 3
FUSE 25A fuse (F01) blown, 15A fuse (F02) blown
3.15A fuse (F04) blown, T5A fuse (F300) blown (SUB P.C. board) T3.15A fuse (F01) blown (SUB P.C. board)
ELECTROLYTIC CAPACITOR VOLTAGE (C10, C11, C12, C13) DC320V not available between
+ terminal of electrolytic capacitor
INVERTER OUTPUT (CN09, CN10, CN11) (Please confirm within six minutes after instructing in the drive.) Voltage between each line of inverterside conector pins are not equal.
Connecting cable check
Converter module (DB01) and electrolytic capacitor (C10 to C13) check IGBT module (Q200) check, Fan motor check SUB P.C. board check
25A fuse (F01) check P.C. board and coverter module (DB01) check
IGBT module and P.C. board check
– 11 –
Color Identification
:
BLK BLU RED GRY PNK GRN
BLACK
:
BLUE
:
RED
:
GRAY
:
PINK GREEN
:
WHI BRN ORN YEL PUR
:
WHITE
:
BROWN
:
ORANGE
:
YELLOW
:
PURPLE
5. SPECIFICATION OF ELECTRICAL PARTS
5-1. Indoor Unit
No. Parts name Type Specifications
1 Fan motor (for indoor) AFP-220-50-4A Output (Rated) 50 W, 220 – 240 V 2 Grille motor MP35EA12 DC 12 V 3 Thermo. sensor (TA-sensor) 550 mm 10 k at 25°C 4 Heat exchanger sensor (TC-sensor) 6 mm, 500 mm 10 k at 25°C 5 Heat exchanger sensor (TCJ-sensor) 6 mm, 500 mm 10 k at 25°C
5-2. Outdoor Unit (RAV-SM560AT-E)
No. Parts name Type Specifications
1 Fan motor ICF-140-43-1 Output (Rated) 40 W 2 Compressor DA130A1F-23F 3 phase, 4P, 1100 W 3 Reactor CH-57 1=10 mH, 16A 4 Outdoor temp. sensor (To-sensor) 10 k at 25°C 5 Heat exchanger sensor (Te-sensor) 10 k at 25°C 6 Suction temp. sensor (Ts-sensor) 10 k at 25°C 7 Discharge temp. sensor (Td-sensor) 50 k at 25°C 8 Fuse (Switching power (Protect)) T3.15 A, AC 250 V
9 Fuse (Inverter, input (Current protect) 25 A, AC 250 V 10 4-way valve solenoid coil STF-0108G 11 Compressor thermo. (Protection) US-622 ON : 90 ± 5°C, OFF : 125 ± 4°C
5-3. Outdoor Unit (RAV-SM800AT-E)
No. Parts name Type Specifications
1 Fan motor ICF-140-63-1 Output (Rated) 63 W, 220 – 240 V
2 Compressor DA220A2F-20L 3 phase, 4P, 1600 W
3 Reactor CH-47
4 Outdoor temp. sensor (To-sensor) 10 k at 25°C
5 Heat exchanger sensor (Te-sensor) 10 k at 25°C
6 Suction temp. sensor (Ts-sensor) 10 k at 25°C
7 Discharge temp. sensor (Td-sensor) 50 k at 25°C
8 Fuse (Switching power (Protect)) T3.15 A, AC 250 V
9 Fuse (Inverter, input (Current protect) 25 A, AC 250 V 10 4-way valve solenoid coil DKV-M0ZS743B0 11 Compressor thermo. (Protection) US-622 ON : 90 ± 5°C, OFF : 125 ± 4°C
– 12 –
6. REFRIGERANT R410A
This air conditioner adopts the new refrigerant HFC (R410A) which does not damage the ozone layer.
The working pressure of the new refrigerant R410A is
1.6 times higher than conventional refrigerant (R22). The refrigerating oil is also changed in accordance with change of refrigerant, so be careful that water, dust, and existing refrigerant or refrigerating oil are not entered in the refrigerant cycle of the air conditioner using the new refrigerant during installation work or servicing time.
The next section describes the precautions for air conditioner using the new refrigerant. Conforming to contents of the next section together with the general cautions included in this manual, perform the correct and safe work.
6-1. Safety During Installation/Servicing
As R410A’s pressure is about 1.6 times higher than that of R22, improper installation/servicing may cause a serious trouble. By using tools and materials exclu­sive for R410A, it is necessary to carry out installation/ servicing safely while taking the following precautions into consideration.
(1) Never use refrigerant other than R410A in an air
conditioner which is designed to operate with R410A. If other refrigerant than R410A is mixed, pressure in the refrigeration cycle becomes abnormally high, and it may cause personal injury, etc. by a rupture.
(2) Confirm the used refrigerant name, and use tools
and materials exclusive for the refrigerant R410A. The refrigerant name R410A is indicated on the visible place of the outdoor unit of the air condi­tioner using R410A as refrigerant. To prevent mischarging, the diameter of the service port differs from that of R22
(3) If a refrigeration gas leakage occurs during
installation/servicing, be sure to ventilate fully. If the refrigerant gas comes into contact with fire, a poisonous gas may occur.
(4) When installing or removing an air conditioner,
do not allow air or moisture to remain in the refrigeration cycle. Otherwise, pressure in the refrigeration cycle may become abnormally high so that a rupture of personal injury may be caused.
(5) After completion of installation work, check to
make sure that there is no refrigeration gas leakage. If the refrigerant gas leaks into the room, coming into contact with fire in the fan-driven heater, space heater, etc., a poisonous gas may occur.
(6) When an air conditioning system charged with a
large volume of refrigerant is installed in a small room, it is necessary to exercise care so that, even when refrigerant leaks, its concentration does not exceed the marginal level. If the refrigerant gas leakage occurs and its concentration exceeds the marginal level, an oxygen starvation accident may result.
(7) Be sure to carry out installation or removal
according to the installation manual. Improper installation may cause refrigeration trouble, water leakage, electric shock, fire, etc.
(8) Unauthorized modifications to the air conditioner
may be dangerous. If a breakdown occurs please call a qualified air conditioner technician or electrician. Improper repair’s may result in water leakage, electric shock and fire, etc.
6-2. Refrigerant Piping Installation
6-2-1. Piping materials and joints used
For the refrigerant piping installation, copper pipes and joints are mainly used. Copper pipes and joints suit­able for the refrigerant must be chosen and installed. Furthermore, it is necessary to use clean copper pipes and joints whose interior surfaces are less affected by contaminants.
(1) Copper pipes
It is necessary to use seamless copper pipes which are made of either copper or copper alloy and it is desirable that the amount of residual oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed, deformed or discolored portion (especially on the interior surface). Otherwise, the expansion valve or capillary tube may become blocked with contaminants. As an air conditioner using R410A incurs pressure higher than when using R22, it is necessary to choose adequate materials. Thicknesses of copper pipes used with R410A are as shown in Table 6-2-1. Never use copper pipes thinner than 0.8 mm even when it is available on the market.
– 13 –
Table 6-2-1 Thicknesses of annealed copper pipes
Thickness (mm)
Nominal diameter Outer diameter (mm) R410A R22
1/4 6.35 0.80 0.80 3/8 9.52 0.80 0.80 1/2 12.70 0.80 0.80 5/8 15.88 1.00 1.00
(2) Joints
For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants.
a) Flare joints
Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm. In such a case, socket joints can be used. Sizes of flare pipe ends, flare joint ends and flare nuts are as shown in Tables 6-2-3 to 6-2-6 below.
Table 6-2-2 Minimum thicknesses of socket joints
Nominal diameter
Reference outer diameter of Minimum joint thickness
1/4 6.35 0.50 3/8 9.52 0.60 1/2 12.70 0.70 5/8 15.88 0.80
b) Socket joints
Socket joints are such that they are brazed for connections, and used mainly for thick pipings whose diameter is larger than 20 mm. Thicknesses of socket joints are as shown in Table 6-2-2.
copper pipe jointed (mm) (mm)
6-2-1. Processing of piping materials
When performing the refrigerant piping installation, care should be taken to ensure that water or dust does not enter the pipe interior, that no other oil other than lubricating oils used in the installed air conditioner is used, and that refrigerant does not leak. When using lubricating oils in the piping processing, use such lubricating oils whose water content has been removed. When stored, be sure to seal the container with an airtight cap or any other cover.
(1) Flare Processing procedures and precautions
a) Cutting the pipe
By means of a pipe cutter, slowly cut the pipe so that it is not deformed.
b) Removing burrs and chips
If the flared section has chips or burrs, refrigerant leakage may occur. Carefully remove all burrs and clean the cut surface before installation.
c) Insertion of flare nut
– 14 –
d) Flare processing
Make certain that a clamp bar and copper pipe have been cleaned. By means of the clamp bar, perform the flare processing correctly. Use either a flare tool for R410A or conven­tional flare tool. Flare processing dimensions differ according to the type of flare tool. When using a conven­tional flare tool, be sure to secure “dimension A” by using a gauge for size adjustment.
D
A
Fig. 6-2-1 Flare processing dimensions
Table 6-2-3 Dimensions related to flare processing for R410A
A (mm)
Conventional flare tool
Clutch type Wing nut type
Nominal diameter
Outer
diameter
(mm)
Thickness
(mm)
Flare tool for R410A
clutch type
1/4 6.35 0.8 0 to 0.5 1.0 to 1.5 1.5 to 2.0 3/8 9.52 0.8 0 to 0.5 1.0 to 1.5 1.5 to 2.0 1/2 12.70 0.8 0 to 0.5 1.0 to 1.5 2.0 to 2.5 5/8 15.88 1.0 0 to 0.5 1.0 to 1.5 2.0 to 2.5
Table 6-2-4 Dimensions related to flare processing for R22
A (mm)
Conventional flare tool
Clutch type Wing nut type
Nominal diameter
Outer
diameter
(mm)
Thickness
(mm)
Flare tool for R22
clutch type
1/4 6.35 0.8 0 to 0.5 0.5 to 1.0 1.0 to 1.5 3/8 9.52 0.8 0 to 0.5 0.5 to 1.0 1.0 to 1.5 1/2 12.70 0.8 0 to 0.5 0.5 to 1.0 1.5 to 2.0 5/8 15.88 1.0 0 to 0.5 0.5 to 1.0 1.5 to 2.0
Table 6-2-5 Flare and flare nut dimensions for R410A
Nominal diameter
Outer
diameter
(mm)
Thickness
(mm)
Dimension (mm)
ABCD
Flare nut
width
(mm)
1/4 6.35 0.8 9.1 9.2 6.5 13 17 3/8 9.52 0.8 13.2 13.5 9.7 20 22 1/2 12.70 0.8 16.6 16.0 12.9 23 26 5/8 15.88 1.0 19.7 19.0 16.0 25 29
Table 6-2-6 Flare and flare nut dimensions for R22
Nominal diameter
Outer
diameter
(mm)
Thickness
(mm)
Dimension (mm)
ABCD
Flare nut
width
(mm)
1/4 6.35 0.8 9.0 9.2 6.5 13 17 3/8 9.52 0.8 13.0 13.5 9.7 20 22 1/2 12.70 0.8 16.2 16.0 12.9 20 24 5/8 15.88 1.0 19.4 19.0 16.0 23 27 3/4 19.05 1.0 23.3 24.0 19.2 34 36
– 15 –
°
° to 46
45
43° to 45°
Fig. 6-2-2 Relations between flare nut and flare seal surface
(2) Flare connecting procedures and precautions
a) Make sure that the flare and union portions do
not have any scar or dust, etc.
b) Correctly align the processed flare surface with
the union axis.
c) Tighten the flare with designated torque by
means of a torque wrench. The tightening torque for R410A is the same as that for conventional R22. Incidentally, when the torque is weak, the gas leakage may occur.
Table 6-2-7 Tightening torque of flare for R410A [Reference values]
Nominal Outer diameter Tightening torque
diameter (mm) N·m (kgf·cm)
1/4 6.35 14 to 18 (140 to 180) 16 (160), 18 (180) 3/8 9.52 33 to 42 (330 to 420) 42 (420) 1/2 12.70 50 to 62 (500 to 620) 55 (550) 5/8 15.88 63 to 77 (630 to 770) 65 (650)
When it is strong, the flare nut may crack and may be made non-removable. When choosing the tightening torque, comply with values designated by manuf acturers. Table 6-2-7 shows reference values.
Note:
When applying oil to the flare surface, be sure to use oil designated by the manufacturer. If any other oil is used, the lubricating oils may deteriorate and cause the compressor to burn out.
Tightening torque of torque
wrenches available on the market
N·m (kgf·m)
– 16 –
6-3. T ools
6-3-1. Required tools
The service port diameter of packed valve of the outdoor unit in the air conditioner using R410A is changed to prevent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing dimensions and opposite side dimension of flare nut (For 12.70 copper pipe) of the refrigerant piping are lengthened.
The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge, clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types.
(1) Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22)) (2) Tools exclusive for R410A, but can be also used for conventional refrigerant (R22) (3) Tools commonly used for R410A and for conventional refrigerant (R22) The table below shows the tools exclusive for R410A and their interchangeability.
Tools exclusive for R410A (The following tools for R410A are required.)
Tools whose specifications are changed for R410A and their interchangeability
R410A air conditioner Conventional air
installation conditioner installation
No. Used tool Usage Existence of Whether Whether new equipment
new equipment conventional can be used with for R410A equipment can conventional refrigerant
be used
1 Flare tool Pipe flaring Yes *(Note 1) 2 Copper pipe gauge Flaring by
for adjusting projection conventional flare Yes *(Note 1) *(Note 1) margin tool
3 Torque wrench
4 Gauge manifold 5 Charge hose
6 Vacuum pump adapter Vacuum evacuating Yes
Electronic balance for
7
refrigerant charging
8 Refrigerant cylinder Refrigerant charge Yes 9 Leakage detector Gas leakage check Yes ! Charging cylinder Refrigerant charge (Note 2)
Connection of flare nut
Evacuating, refrigerant charge, Yes run check, etc.
Refrigerant charge Yes
Yes
(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection
margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.
(Note 2) Charging cylinder for R410A is being currently developed.
General tools (Conventional tools can be used.)
In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary as the general tools. (1) Vacuum pump (4) Reamer (9) Hole core drill (∅65)
Use vacuum pump by (5) Pipe bender (10) Hexagon wrench
attaching vacuum pump adapter. (6) Level vial (Opposite side 4 mm) (2) Torque wrench (7) Screwdriver (+, –) (11) Tape measure (3) Pipe cutter (8) Spanner of Monkey wrench (12) Metal saw
Also prepare the following equipments for other installation method and run check. (1) Clamp meter (3) Insulation resistance tester (2) Thermometer (4) Electroscope
– 17 –
6-4. Recharging of Refrigerant
When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps.
Recover the refrigerant, and check no refrigerant remains in the equipment.
When the compound gauge’s pointer has indi­cated -0.1 Mpa (-76 cmHg), place the handle Low
Connect the charge hose to packed valve service port at the outdoor unit’s gas side.
in the fully closed position, and turn off the vacuum pump’s power switch.
Connect the charge hose of the vacuum pump adapter.
Open fully both packed valves at liquid and gas sides.
Keep the status as it is for 1 to 2 minutes, and ensure that the compound gauge’s pointer does not return.
Set the refrigerant cylinder to the electronic balance, connect the connecting hose to the cylinder and the connecting port of the electronic balance, and charge liquid refrigerant.
Place the handle of the gauge manifold Low in
(For refrigerant charging, see the figure below.)
the fully opened position, and turn on the vacuum pump’s power switch. Then, evacuating the refrigerant in the cycle.
1 Never charge refrigerant exceeding the specified amount. 2 If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode. 3 Do not carry out additional charging.
When additional charging is carried out if refrigerant leaks, the refrigerant composition changes in the refrigeration cycle, that is characteristics of the air conditioner changes, refrigerant exceeding the specified amount is charged, and working pressure in the refrigeration cycle becomes abnormally high pressure, and may cause a rupture or personal injury.
(INDOOR unit)
Refrigerant cylinder
(With siphon pipe)
Check valve
Open/Close valve
for charging
Electronic balance for refrigerant charging
Fig. 6-4-1 Configuration of refrigerant charging
(Liquid side)
(Gas side)
– 18 –
(OUTDOOR unit)
Opened
Closed
Service port
1 Be sure to make setting so that liquid can be charged. 2 When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.
It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant. Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the cylinder upside down if cylinder is not equipped with siphon.
[Cylinder with siphon][Cylinder with siphon] [Cylinder without siphon]
Gauge manifold
OUTDOOR unit
Refrigerant
cylinder
Gauge manifold
OUTDOOR unit
cylinder
Refrigerant
Electronic
balance
R410A refrigerant is HFC mixed refrigerant. Therefore, if it is charged with gas, the composition of the charged refrigerant changes and the characteristics of the equipment varies.
6-5. Brazing of Pipes
6-5-1. Materials for brazing (1) Silver brazing filler
Silver brazing filler is an alloy mainly composed of silver and copper. It is used to join iron, copper or copper alloy, and is relatively expensive though it excels in solderability.
(2) Phosphor bronze brazing filler
Phosphor bronze brazing filler is generally used to join copper or copper alloy.
(3) Low temperature brazing filler
Low temperature brazing filler is generally called solder, and is an alloy of tin and lead. Since it is weak in adhesive strength, do not use it for refrigerant pipes.
Electronic
balance
Siphon
Fig. 6-4-2
1 Phosphor bronze brazing filler tends to react
with sulfur and produce a fragile compound water solution, which may cause a gas leakage . Therefore, use any other type of brazing filler at a hot spring resort, etc., and coat the surface with a paint.
2 When performing brazing again at time of
servicing, use the same type of brazing filler.
6-5-2. Flux (1) Reason why flux is necessary
By removing the oxide film and any foreign matter on the metal surface, it assists the flow of brazing filler.
In the brazing process, it prevents the metal surface from being oxidized.
By reducing the brazing filler’s surface tension, the brazing filler adheres better to the treated metal.
– 19 –
(2) Characteristics required for flux
Activated temperature of flux coincides with the brazing temperature.
Due to a wide effective temperature range , flux is hard to carbonize.
It is easy to remove slag after brazing.
The corrosive action to the treated metal and
brazing filler is minimum.
It excels in coating performance and is harmless to the human body.
As the flux works in a complicated manner as described above, it is necessary to select an adequate type of flux according to the type and shape of treated metal, type of brazing filler and brazing method, etc.
(3) Types of flux
Noncorrosive flux
Generally, it is a compound of borax and boric
acid.
It is effective in case where the brazing
temperature is higher than 800°C.
Activated flux
Most of fluxes generally used for silver brazing
are this type.
It features an increased oxide film removing
capability due to the addition of compounds such as potassium fluoride, potassium chloride and sodium fluoride to the borax-boric acid compound.
(4) Piping materials for brazing and used brazing
filler/flux
6-5-3. Brazing
As brazing work requires sophisticated techniques, experiences based upon a theoretical knowledge, it must be performed by a person qualified. In order to prevent the oxide film from occurring in the pipe interior during brazing, it is effective to proceed with brazing while letting dry Nitrogen gas (N
) flow.
2
Never use gas other than Nitrogen gas.
(1) Brazing method to prevent oxidation
1 Attach a reducing valve and a flow-meter to the
Nitrogen gas cylinder.
2 Use a copper pipe to direct the piping material,
and attach a flow-meter to the cylinder.
3 Apply a seal into the clearance between the
piping material and inserted copper pipe for Nitrogen in order to prevent backflow of the Nitrogen gas.
4 When the Nitrogen gas is flowing, be sure to
keep the piping end open.
5 Adjust the flow rate of Nitrogen gas so that it is
3
lower than 0.05 m
2
) by means of the reducing valve.
cm
/Hr or 0.02 Mpa (0.2 kgf/
6 After performing the steps above, keep the
Nitrogen gas flowing until the pipe cools down to a certain extent (temperature at which pipes are touchable with hands).
7 Remove the flux completely after brazing.
M
Flow meter
Piping Used brazing Used
material filler flux
Copper - Copper Phosphor copper Do not use
Copper - Iron Silver Paste flux
Iron - Iron Silver Vapor flux
1 Do not enter flux into the refrigeration cycle. 2 When chlorine contained in the flux remains
within the pipe, the lubricating oil deteriorates. Therefore, use a flux which does not contain chloring.
3 When adding water to the flux, use water which
does not contain chlorine (e.g. distilled water or ion-exchange water).
4 Remove the flux after brazing.
Stop valve
Nitrogen gas
cylinder
From Nitrogen cylinder
Pipe
Nitrogen gas
Rubber plug
Fig. 6-5-1 Prevention of oxidation during brazing
– 20 –
Heat Exchanger Sensor (TCJ)
Heat Exchanger Sensor (TC)
Temperature Sensor
7. CONTROL BLOCK DIAGRAM
Indoor Unit Control Panel
8 MHzM.C.U.
Functions
Louver Control
3-minute Delay at Restart for Compressor
Hi POWER
Display
FILTER Sign
Display
Infrared Rays Signal Receiver
Initiallizing Circuit
Infrared
Rays
36.7 kHz
Clock Frequence
Oscillator Circuit
Power Supply
Remote
Circuit
Control
Noise Filter
From Outdoor Unit
Motor Revolution Control
Processing
(Temperature Processing)
Timer
Drain Pump ON/OFF
Serial Signal Communication
Serial Signal
Transmitter/
Receiver
Serial Signal Communication
Relay
RY401
Louver ON/OFF Signal
Louver Driver
PRE DEF.
Sign Display
TIMER
Display
OPERATION
Display
Indoor Fan
Motor
Louver Motor
Float
Switch
Drain
Pump
REMOTE CONTROL
Infrared Rays
Remote Control
Operation (START/STOP) Operation Mode Selection
AUTO, COOL, DRY, HEAT, FAN ONLY
Temperature Setting Fan Speed Selection
ON TIMER Setting
OFF TIMER Setting
Louver Auto Swing
Louver Direction Setting
ECO
Hi power
Filter Reset
– 21 –
8. OPERATION DESCRIPTION
8-1.When power supply is reset
(1) Distinction of outdoor units
When the power supply is reset, the outdoors are distinguished, and control is exchanged according to the distinguished result.
(2) Setting of the indoor fan speed
Based on EEPROM data, rspeed of the indoor fan is selected.
Remarks: Air speed
8-2.Operation mode selection
(1) Based on the operation mode selecting command
from the remote control, the operation mode is selected.
Table 8-2-1
Remote control
command
STOP Air conditioner stops.
FAN Fan operation
COOL Cooling operation
DRY Dry operation
HEAT Heating operation
AUTO Automatic operation
(2) Automatic Operation
The air conditioner selects and operates in one
of the operating modes of cooling, heating or fan only, depending on the room temperature.
If the AUTO mode is uncomfortable, you can
select the desired conditions manually.
Outline of control
8-3.Air volume control
(1) Operation with [HIGH (H)], [MED (M)], [LOW (L)],
or [AUTO] mode is performed by the command from the remote control.
(2) When [FAN] button is set to AUTO, the indoor fan
motor operates as shown in Fig. 8-3-1, Fig. 8-3-2 and Table 8-3-1.
<COOL>
°C
+3 +2.5 +2 +1.5 +1 +0.5
(Room temp.) (Preset temp.)
Preset temp.
0
0.5
NOTE :
*1: The values marked with *1 are calculated and
controlled by the difference in motor speed between M+ and L–.
Fig. 8-3-1
M+
*1 *1 *1
Table 8-2-2
Room temperature in operation Operating condition
The set temperature +1°C or higher (in case that the room is hot)
The set temperature –1°C to +1°C
Cooling operation
Fan only operation
Performs the cooling operation at a temperature 1°C higher than the setting.
Performs the fan only operation (low speed) while monitoring the room temperature. When the room temperature changes, the air conditioner will select the cooling or heating mode.
The set temperature –1°C or lower (in case that the room is cold)
Heating operation
Performs the heating operation at a temperature 1°C lower than the setting.
– 22 –
<HEAT>
8-4.Cool air discharge preventive control
Preset temp.
°C
0
0.5
1
1.5
2
5.0
5.5
[FAN AUTO]
(Room temp.) (Preset temp.)
L
*1 *2
+
M
H
NOTE :
*1, *2 : The values marked with *1 and *2 are
calculated and controlled by the difference in motor speed between M+ and L.
Fig. 8-3-2
Table 8-3-1
RAV-SM560XT-E RAV-SM800XT-E
MODEL
Cooling HIGH 1060 800 1190 900
and MED 950 690 1010 750
Fan only LOW 800 580 850 650
Heating MED 970 730 1070 800
Motor speed Air flow level Motor speed Air flow level
(rpm) (m3/h) (rpm) (m3/h)
HIGH 1120 830 1300 980
LOW 820 600 860 650
In heating operation, 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. 8-4-1 and Table 8-4-1.
Manual (One of
AUTO
*4
SUL* SUL*1
Stop
5 steps)
LH (Up to setting
3
speed)
*2
A+4 A+4 A8A−8
464534
33
33 21 32 20
*6 *5
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: SUL means Super Ultra Low. *4: Calculated from difference in motor speed
between SUL and HIGH.
Fig. 8-4-1 Cold draft preventing control
LOW
MED
LOW+MED
+
=
MED+HIGH
+
=
*5 and *6:
2
2
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
Table 8-4-1
–4°C
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
– 23 –
8-5.Freeze preventive control (Low
temperature release)
The cooling operation (including Dry operation) is performed as follows based on the detected temperature of Tc sensor or Tcj sensor.
When [J] zone is detected for T1 minutes (Following figure), the commanded frequency is decreased from the real operation frequency. After then the commanded frequency changes every 2 minutes while operation is performed in [J] zone.
T1
Normal 1 minute
In [K] zone, time counting is interrupted and the operation is held.
When [I] zone is detected, the timer is cleared and the operation returns to the normal operation.
(°C)
7 6 5
In heating operation, the freeze-preventive control works if 4-way valve is not exchanged and the condition is satisfied.
I
J
Fig. 8-5-1
A
K
8-7.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 microcomputer, 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, it stops swinging.
8-8.Filter sign display
(1) The operation time of the indoor fan is calculated,
the filter lamp (Orange) on the display part of the main unit goes on when the specified time (240H) has passed. When a wired remote controller is connected, the filter reset signal is sent to the remote controller, and also it is displayed on LCD of the wired remote control.
(2) When the filter reset signal has been received
from the wired remote control after [FILTER] lamp has gone on or when the filter check button (Temporary button) is pushed, time of the calculation timer is cleared. In this case, the measurement time is reset if the specified time has passed, and display on LCD and the display on the main unit disappear.
Remarks:
Tcj : Indoor heat exchanger sensor temperature
8-6.High-temp release control
The heating operation is performed as follows based on the detected temperature of Tc sensor.
When [M] zone is detected, the commanded frequency is decreased from the real operation frequency. After then the commanded frequency changes every 30 seconds while operation is performed in [M] zone.
In [N] zone, the commanded frequency is held.
When [L] zone is detected, the commanded
frequency is returned to the original value by approx. 6Hz every 60 seconds.
Tc (°C)
55 A 52 48 B
L
M N
Remarks:
[FILTER] goes on
Fig. 8-6-1
– 24 –
8-9.Auto Restart Function
PRE.DFILTERHi POWER
PRE.DFILTERHi POWER
The indoor unit is equipped with an automatic restarting function which allows the unit to restart operating with the set operating conditions in the event of power supply being accidentally shut down. The operation will resume without warning three minutes after power is restored. This function is not set to work when shipped from the factory. Therefore it is necessary to set it to work.
8-9-1. How to set auto restart function
To set the auto restart function, proceed as follows: The power supply to the unit must be on; the function will not set if the power is off. Push the [TEMPORARY] button located in the center of the front panel continuously for three seconds. The unit receives the signal and beeps three times. The unit then restarts operating automatically in the event of power supply being accidentally shut down.
When the unit is on standby (Not operating)
Operation Motions
Push [TEMPORARY] button for more The unit is on standby. than three seconds.
The unit starts to operate. The green lamp is on.
After approx. three seconds,
0
3S
The unit beeps three times The lamp changes from and continues to operate. green to orange.
TEMPORARY
button
If the unit is not required to operate at this time, push [TEMPORARY] button once more or use the remote control to turn it off.
When the unit is in operation
Operation Motions
Push [TEMPORARY] button for more The unit is in operation. The green lamp is on. than three seconds.
The unit stops operating. The green lamp is turned off.
After approx. three seconds,
0
3S
TEMPORARY
button
While this function is being set, if the unit is in operation, the orange lamp is on.
This function can not be set if the timer operation
The unit beeps three times. If the unit is required to operate at this time, push [TEMPORARY]
button once more or use the remote control to turn it on.
While the filter check lamp is on, the TEMPORARY button has the function of filter reset button.
has been selected.
When the unit is turned on by this function, the louver will not swing even though it was swinging automatically before shutting down.
– 25 –
Loading...
+ 61 hidden pages