Ｒ００２
Ｃ００９
Ｌ
Ｎ
２５ＡＦＵＳＥ
Ｒ００１
Ｃ００３
Ｃ００２
Ｃ００１
Ｃ０１２
ＣＴ−Ａ
ＣＴ−Ｂ
Ｃ０１０Ｃ０１１
Ｃ０１３
Ｃ０１４
Ｌ００４
Ｌ００６
５Ａ
-
ＦＵＳＥ
Ｌ００１
Ｌ００２
Ｌ００５
ＢＬＫ
ＷＨＴ
ＶＡＲＩＳＴＯＲ１
ＶＡＲＩＳＴＯＲ２
ＧＲＮ３
ＮＯＩＳＥ
ＦＩＬＴＥＲＣＯＩＬ１
Ｒ００３
ＶＡＲＩＳＴＯＲ３
ＰＯＷＥＲＲＥＬＡＹ Ａ
ＰＯＷＥＲＲＥＬＡＹ Ｂ
ＩＮＲＵＳＨ
ＰＲＥＶＥＮＴＩＯＮ
ＲＥＬＡＹ Ａ
Ｒ００４
ＩＮＲＵＳＨ
ＰＲＥＶＥＮＴＩＯＮ
ＲＥＬＡＹ Ｂ
ＹＥＬ
（ＳＰＩＲＡＬ）
ＢＬＵ
（ＳＰＩＲＡＬ）
ＢＬＵ
ＹＥＬ
ＲＥＡＣＴＯＲＣ
３Ａ
-
ＦＵＳＥ
−
Diode bridge
１
Ｃ０１５
＋
Ｃ２０１
−
＋
ＳＷ−Ｄ
P.W.B.
Ｃ１
Ｄ１
Ｃ２
Ｄ２
Ｃ３
Ｄ３
Ｃ４
Ｄ４
ＴＥＲＭＩＮＡＬ
ＢＯＡＲＤ
ＳＵＲＧＥＡＢＳＯＲＢＥＲ
Indoor unit 1
Cautions!
If it miss connections,
protection will work and
35V will not be outputted.
Indoor unit 2
Terminal board
Indoor unit 3
Indoor unit 4
SW power supply for outdoor
control P.W.B.
12V-A, 12V-B, 5V-A, 5V-B
17V-A, 17V-B, -5V
The I/F circuit for unit 1
The I/F circuit for unit 2
The I/F circuit for unit 3
The I/F circuit for unit 4
SW power supply
for unit 3 & unit 4.
(35V-B BEN5V-B)
(BEN12V-B)
SW power supply
for unit 1 & unit 2.
(35V-A BEN5V-A)
(BEN12V-A)
4. P.W.B. Power Supply Circuit (Switching Power Circuit)
Fig. 4-1 Function of P.W.B. Power Supply Circuit
RAM-80QH5 has [SWITCHING POWER SUPPLY CIRCUIT FOR OUTDOOR CONTROL P.W.B.] (the circuit is in charge of outdoor
control power supply entirely) on their control P.W.B. RAM-80QH5 has [SWITCHING POWER SUPPLY CIRCUIT FOR INDOOR
UNIT] (the circuit generates 35V power supply for the indoor units of 4 rooms (3 rooms in case of 3 rooms multi) and 12V, 5V, for
electric expansion valve control on their SW-D- P.W.B. with 2-circuit.)
The functions of switching power circuit, input DC approx. 325V, which was rectificated by the diode bridge DB1, into the primary.
Switch the control IC on and off at high speed to generate the voltage in the switching transformer primary winding. Transmit the
voltage to the secondary winding through the transformer core. The voltage is generated at each secondary output corresponding to
each winding.
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