3. Drive circuit of the indoor fan motor
䊶
The indoor fan motor receives VDC (motor drive power supply), VCC (power supply for the control circuit inside the motor),
and VS (speed command voltage) from CN2. The indoor fan motor returns an FG signal of a frequency that matches the
rotation speed.
䊶
VCC stabilizes the primary 18.5 V power supply into 15 V by using Q201 and supplies it.
䊶
While on standby for a remote control signal, the Q201 shuts down the VCC and reduces the standby power.
䊶
The VS receives a command voltage from the microcomputer. The VS terminal undergoes an analog voltage that
matches the Lo level time ratio of the pulse signal from pin
$5
of the microcomputer. (See Fig. 3-2.)
䊶
The FG terminal undergoes a signal of 12 pulses per revolution of the motor shaft. By counting the pulse rate, the
microcomputer recognizes the motor speed, thereby performing feedback control.
< Typical circuit waveform >
FG voltage of fan motor (between pins and of CN2)
When slow
(700min-
1
)
1.7ms.
When fast
(1200min-
1
)
1.7ms.
5V
5V
When slow
(700min-
1
)
7.1ms.
When fast
(1200min-
1
)
15V
15V
4.2ms.
1300min-
1
2.1V
5.4V
Fig. 3-1
Fig. 3-2
< The circuit check (For test) >
Name
Test point
Test voltage
CN2 1 pin- 3 pin
Motor drive power
Motor contorl power
Motor speed signal
Motor rotation speed debug
CN2 4 pin- 3 pin
CN2 5 pin- 3 pin
CN2 6 pin- 3 pin
About 325V
About 15V
About 2-6V
About 7.5V
* The voltage above is all motor operation vol. when yon start the test, take care
of your connector, do not touch the different pin together.
* The voltage of pin 5 - pin 3 , pin 6 - 3 maybe diffierent from above.
< Pin 5 - Pin 3 voltage one example >
Vsp voltage
「
V
」
* The different mode maybe have
different FAN rotation speed.
69
69
11
6
3
4
5
6
1
3
6
44
Содержание RAK-15QEF
Страница 2: ... DANGER 2 ...
Страница 21: ...WIRING DIAGRAM MODEL RAK 15QEF RAK 18 25 35 50REF RAK 18 25 35 50REFC 21 ...
Страница 22: ...WIRING DIAGRAM OF THE PRINTED WIRING BOARD Remote controller RAR 7PE1 22 ...
Страница 23: ...CIRCUIT DIAGRAM MODEL RAK 15QPE RAK 18 25 35 50REF RAK 25 35 50REFC AX 17H725 ...
Страница 24: ...BLOCK DIAGRAM MODEL RAK 15QEF RAK 18 25 35 50REF RAK 25 35 50REFC Humidity Sensor AX17H725V13 Frost wash 24 ...
Страница 25: ...31 33 29 MODEL RAK 15QPE RAK 18 25 35 50REF RAK 25 35 50REFC 25 ...
Страница 38: ...MODEL RAK 15QEF RAK 18 25 35REF RAK 25 35REFC 38 ...
Страница 39: ...MODEL RAK 50REF RAK 50REFC 39 ...
Страница 42: ...DESCRIPTION OF MAIN CIRCUIT OPERATION MODEL RAK 15QEF RAK 18 25 35 50REF RAK 25 35 50REFC 42 ...
Страница 48: ...10 10 10 10 10 DSW1 48 ...
Страница 52: ...RL1 RL1 RL2 52 ...
Страница 64: ...ON OFF ON OFF ON OFF 3 and page 3 8 9 64 ...
Страница 65: ...DISPLAY OPERATION MODE SETTING ON OFF 65 ...
Страница 66: ... FAN SPEED POWERFUL FAN SPEED POWERFUL HOW TO CHANGE THE INTERMITTENT FAN CONTROL SETTING 66 ...
Страница 82: ...JCH WH NO 0131E RAK 15QEF RAK 18REF RAK 25REF RAK 50REF RAK 25REFC RAK 35REFC RAK 35REF RAK 50REFC 82 ...