akira AC-S7CG User manual

Air Conditioner
Service Manual
   
http://splitoff.ru/tehn-doc.html
, ,  , .

2
Model No.: AC-S7CG
Version: 1.0
MODEL:
AC-S7CG
    : http://splitoff.ru/tehn-doc.html

3
Model No.: AC-S7CG
Version: 1.0
CONTENTS
TECHNICAL SPECIFICATION.............................................................................................................. 4
PERFORMANCE CURVE ...................................................................................................................... 5
EXPLODED VIEW & PARTLIST........................................................................................................... 8
CIRCUIT DIAGRAM ............................................................................................................................ 12
PCB FUNCTION MANUAL................................................................................................................. 13
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4
Model No.: AC-S7CG
Version: 1.0
TECHNICAL SPECIFICATION
Capacity (Btu/Hr) actual data 7000BTU
Volts 220-240V /50Hz
EER /COP (heat pump) btu /w 8.54
Amperes 3.9
LRA 19
Receptacle type
Fan speeds 3 speeds
Moisture Removal (L/Hr) 0.65
CFM. Hi (M3/H) 400
Air Flow control Remarks
Ventilation No
Exhaust No
Energy saver switch No
Dimension W x H x D (mm) indoor 740 x 250 x 180
Dimension W x H x D (mm) outdoor 660 x 428 x 255
Packing Dimension W x H x D (mm) indoor 870 x 336 x 280
Packing Dimensions W x H x D (mm) outdoor 765 x 500 x 350
Indoor Weight (net /Gross) kg 8/11
Outdoor Weight (Net /Gross) kg 25/29
    : http://splitoff.ru/tehn-doc.html

5
Model No.: AC-S7CG
Version: 1.0
PERFORMANCE CURVE
The change relation between low pressure, operation current and temp.
Cooling operation condition: In testing, indoor and outdoor have same work condition.
Heating operation
Indoor work condition: dry bulb temp.21, wet bulb temp. 15.5 oC.
    : http://splitoff.ru/tehn-doc.html

6
Model No.: AC-S7CG
Version: 1.0
    : http://splitoff.ru/tehn-doc.html

7
Model No.: AC-S7CG
Version: 1.0
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8
Model No.: AC-S7CG
Version: 1.0
EXPLODED VIEW & PART LIST
INDOOR UNIT
    : http://splitoff.ru/tehn-doc.html

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Model No.: AC-S7CG
Version: 1.0
No Description Qty
1 Wall mounting frame 1
2 Rear case 1
3 Evaporator pipe cover 1
4 Drainage pipe 1
5 Pipe clamp 1
6 Cross flow fan 1
7 Fan bearing 1
8 Ring of bearing 1
9 Water tray 1
10 Swing louver 12
11 Swing link 1
12 Manual lever 2
13 Evaporator assy 1
14 Evaporator support 1
15 Front case 1
16 Screw cover 2
17 Front panel 1
18 Filter 2
19 Air cleaner holder 2
20 Guide louver 1
21 Remote controller Y512F 1
22 Guide louver bearing 3
23 Main PCB 1
24 Fuse 3.15A250VAC 1
25 Room sensor 1
26 Tube sensor 1
27 Sensor insert 1
28 Sensor motor MP28EA 1
29 Motor FN7C 1
30 Motor clamp 1
31 Wire clip 1
32 Wire clamp 1
33 LED holder 1
34 Receiver board JD 1
35 Receiver board K 1
36 Terminal board T240A 1
37 Electric box cover 1
38 Electric box 1
39 Transformer SC23B 1
40 Connecting cable 1
41 Power cord 1
42 Signal control wire 1
    : http://splitoff.ru/tehn-doc.html

10
Model No.: AC-S7CG
Version: 1.0
OUTDOOR UNIT
    : http://splitoff.ru/tehn-doc.html

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Model No.: AC-S7CG
Version: 1.0
No Description Qty
1 Front grill 1
2 Axial flow fan 1
3 Front plate 1
4 Metal base 1
5 4-way rever sing valve component 1
6 4-way valve 1
7 4-way valve coil 1
8 Capillary assy 1
9 Compressor KH145VFRA 1
10 Overload protector 1
11 Handle 1
12 Gas valve 1
13 Liquid valve 1
14 Valve support 1
15 Right side plate 1
16 Wiring clamp plate 1
17 Wiring clamp cover 1
18 Terminal board T386A 1
19 Electric plate 1
20 Comp capacitor 1
21 Capacitor clamp 1
22 Fan capacitor 1
23 Isolation sheet assy 1
24 Condenser assy 1
25 Rear grill 1
    : http://splitoff.ru/tehn-doc.html

12
Model No.: AC-S7CG
Version: 1.0
CIRCUIT DIAGRAM
These circuit diagrams are subject to change without notice. Please refer to the ones stuck on the
machines.
    : http://splitoff.ru/tehn-doc.html

13
Model No.: AC-S7CG
Version: 1.0
PCB FUNCTION MANUAL
3 In 1 PCB Function manual
A. Running mode
1. Cooling
2. Dehumidifying
3. Heating
4. Auto
B. Input parameters
1. Indoor ambient temp. T in
2. Evaporator tube temp. T eva
3. Setting temp. T set
4. Condenser tube temp. T con
C. Targets
1. Indoor motor (motor)
2. Swing motor
3. Outdoor motor (single speed motor)
4. Compressor
5. Four-way reversing valve
6. Cooling, dehumidifying indicator; running indicator
7. Digital tube setting temp. indicator or timer indicator
D. Fundamental functions
Cooling mode
1 The running conditions and control measures
a. If T in > or = T set + 1oC, the machine runs at the cooling mode. Compressor runs, outdoor
motor runs at low speed, indoor fan runs at the set fan speed.
b. If T in < or = T set –1oC, the machine stops. Compressor stops first, outdoor motor stops after 15
seconds, indoor motor runs at the set fan speed.
c. If T set –1oC < T in < T set +1oC, keep the previous state.
2 In this mode, the reversing valve is inactive, the temp. setting range is from 16~30oC.
3 Protect function
a. Anti-freezing function.
i. If compressor have run 6 minutes , and detect T eva < 0oC for continuous 3 minutes, then
the compressor, outdoor fan stopped , indoor fan run at the set fan speed. After 3 minutes
later, it will run at the original state if T eva > or = 10oC.
b. Compressor protection
i. Compressor’s starting interval should be more than 3 minutes no matter in whatever modes
and conditions. If it’s plugged in first time, the compressor does not have 3 minutes delay.
When compressor is started, it will not stop within 5 minutes unless it is plugged out.
c. Overload protection
i. If it detect the system current surpass the designed 13 A for continuous 3 minutes, the
machine go into fan mode, when 3 minutes passed and it detect the current no more than 13
A, it will back to original state. If it detects overloading states for 6 consecutive times, the
machine stops, and must be restarted by remote controller.
    : http://splitoff.ru/tehn-doc.html

14
Model No.: AC-S7CG
Version: 1.0
Dehumidifying mode
1 The working conditions and control measures
a. If T in > T set + 2oC, it is in cooling running, the indoor motor speed can be selected, and
outdoor motor run at low speed.
b. If T set – 2oC < or = T in < or = T set + 2oC, it goes into dehumidifying running, the indoor motor
run at the low speed, 6 minutes later the compressor stops, another 15 seconds later the outdoor
fan stops and another 30 seconds later, the indoor motor stops, 3 and a half minutes later,
compressor and outdoor fan run again, indoor motor runs at the low speed, then the machine
cycle the above procedures repeatedly. Outdoor motor runs at the low speed.
c. If T in > T set – 2oC, compressor, outdoor motor and indoor motor stop.
2 In this mode, the reversing valve is inactive, the temp. setting range is 16~30oC.
3 Anti-freezing protection.
a. If T indoor > T set + 2oC, it goes into cooling running, anti-freezing function is same with
cooling mode, but the compressor must stops for 4 minutes when it goes into dehumidifying
mode, compressor runs 6 minutes, if it detects T eva < 0oC, compressor and outdoor motor stop,
indoor motor runs at low speed, after 3 minutes delay, and T eva > or = 10oC, it will be back to
its original state.
Heating mode
1 The working conditions and control measures
a. If T in < or = T set + 2oC, it goes into heating mode, reversing valve, compressor and outdoor
motor all work in the same time, indoor fan will run at the same procedures with anti cool air
function.
b. If T in > or = T set + 4oC, compressor stops first, 15 seconds late, outdoor motor stops, but
reversing valve keeps working, indoor motor run at the procedures of blowing surplus heat.
c. If T set + 2oC < T indoor < T set + 4oC, keep the previous running state.
2 In this mode, the temperature setting range is 16~30oC.
3 The working conditions of auxiliary electric heater.
a. In heating mode, when compressor is working, indoor motor runs at high speed and middle
speed. If it detect T eva < 50oC for continuous 8 seconds and T indoor < or = 25oC , electric
heater will work, if compressor stop or indoor motor runs at low speed or T eva 54oC or T indoor
28oC or 10 seconds before defrosting, the electric heater will stop.
4 Protections
a. Anti cool air
i. When the machine starts heating and T eva > or = 22oC , indoor motor runs at low speed,
and swing motor makes the louver at the horizontal position, if T eva > or = 40oC or
compressor have run 2 minutes ,indoor motor and swing motor will run at the set speed.
b. Anti high temp.
i. In heating mode, if it detect T eva 56oC (58 can be selected), outdoor motor will stop (in this
period it will not detect the defrosting temp.). If T eva 52oC, outdoor motor will be back
running (it will not detect defrosting temp. in the first 5 seconds).
c. Blowing surplus heat
i. In heating mode, when set temp is reached, comp. stops first, 15 seconds later outdoor fan
stops, Indoor motor blows 90 seconds (60 seconds can be selected) at low speed ,swing
motor makes the louver at the horizontal position.
d. Compressor’s protection is same with the one in cooling mode.
e. Overload protection
i. If it detects that the system current surpassed the designed 13 A for continuous 3 seconds,
compressor, electric heater and outdoor motor stop , indoor motor runs the same procedures
as the blowing surplus heat condition. After 3 minutes and current no more than 13 A, the
machine will be back to its original state, indoor motor runs as the anti cool air condition. If
it detects overloading state for 3 consecutive times within 30 minutes, the machine stops,
and it must be restarted by remote controller.
    : http://splitoff.ru/tehn-doc.html

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Model No.: AC-S7CG
Version: 1.0
f. Defrosting conditions and procedures
i. In heating mode, if compressor has run 44 minutes ( in its first 6 minutes it will not detect
defrosting temp.) , and it has detected T con < or = -4oC for continuous 1 minutes, it begins
to defrost, electric heater will stop for 10 seconds ( even if electric heater is not working),
then indoor motor stops, reversing valve becomes inactive in another 2 seconds, another 2
seconds later, outdoor motor stops, when T con > or = 10oC or defrosting lasts for 10
minutes, outdoor motor and reversing valve becomes active, indoor motor will run as the
anti cool air condition, then it cycles again, recalculates the compressor’s running time
again. (In this period, if any protection works, and after the machine is back to work, it will
re-start defrosting state. it will not detect outdoor tube temp when compressor’s in its first 6
minutes running)
g. Noise eliminated protection
i. When you use RUN/STOP button to switch off the machine, reversing valve will become
inactive in 2 minutes.
AUTO mode
1 In AUTO mode, standard cooling T set = 25oC, standard heating T set = 20oC.
2 Working procedures
a. If T indoor > or = T set + 1oC , select cooling mode, from this time, the set temp. is 25oC. If T
indoor < or = T set – 1oC, compressor and outdoor motor stop, indoor motor runs at the set
speed, if T set -1 < T indoor < T set + 1oC, keep the original state.
b. If T indoor < or = T set + 2oC, select heating mode, from this time, the set temp. is 20oC, if T
indoor > or = T set + 4oC, compressor stops first, outdoor motor stops 15 seconds later,
reversing valve is always active, indoor motor runs as the blowing surplus heat condition. If T
set +2oC < T indoor < T set +4oC, keeps the original state. Cooling only AUTO mode: there is
no heating function in this mode.
3 Protections
a. It is same as the one in cooling or heating mode.
4 Other controls
1 SWING mode
a. When it is active, the louver returns to position O, close the air outlet.
b. When machine works, it turns to the max. Air output position D, then returns back to position L
to stand by (position L is the horizontal place mentioned before).
c. In swing state, the louver swings between position L and position D.
d. When the machine is switched off, it is back to position O.
e. When the machine is running and the swing is off, the louver stops at position E.
O
L
E
D
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Model No.: AC-S7CG
Version: 1.0
2 Beeper
a. When PCB becomes active or receives the signal from the remote controller, the beeper will
beep.
3 Indication lamps
a. It flashes when defrosting begin.
4 Press the AUTO button a time, the machine runs in AUTO mode, indoor motor runs in low speed,
fresh air function is not active, press again the machine stops.
5 Fresh air function.
a. There are two fresh air modes.
Fresh air 2
i. Fresh air motor will work 1 hour, then rest 1 hour, then cycle again.
Fresh air 1
ii. Press the button AIR on the remote controller to select fresh air 1 function, the swing motor
keeps running till you give a signal to change it.
6 Automatic fan speed.
a. In cooling mode, if T indoor > T set + 5oC high speed
T indoor > or = T set +3oC middle speed
T indoor > or = T set + 1oC low speed
b. In dehumidify mode, if T indoor > or = T set + 5oC high speed
Tindoor >or =Tset+2
oC low speed
SLEEP mode
1 In cooling or dehumidifying mode, 1 hour after you set the sleep timer, T set will add 1oC
automatically, another 1 hour, another 1 will be added.
2 In heating mode, 1 hour after you preset the sleep timer, T set will lower 1oC automatically, another
1 hour, another 1oC will be lowered.
    : http://splitoff.ru/tehn-doc.html

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, ,  , .