Hitachi RAM-68NP3B, Service Manual, Page: 48 / 79

ＨＩＣ
TAB terminal TAB terminal
Ｃ６０３
Inverter PWB
Ｃ６２１
Ｑ６２３
Ｒ６２７
０Ｖ
Ｒ６２６
Ｃ６０
４
Ｃ０２
２
＋
Ｃ０２
１
Ｃ０２０ ＋
ＤＢ６０２
ＤＢ６０１
Ｄ６０１
Ｃ６０１
＋
Ｒ６０１
５．３ｍＨ
Ｑ６０２
Ｑ６
０
1
D612 D611 R613
R616
C622
C623
R615
R612
C612 C611
R614
Ｒ６１ 0
Ｒ６１ 1
Ｒ６２５
J23
Ｒ６２ 4
5V
2
5
6
8
3
16V
0V
Ｒ６５２
Ｃ６５２
HIC-0V
Ｄ２０１
Ｒ６２８
２６
２８
Ｄ２０２
１９
ACT chopper output
ACT Ip cut
Input
voltage
Vd
＋
(4) IGBT for improving power factor (Q601, Q602)
When load on the compressor increases, the power factor is improved by applying current to the chopper interval
between Q601 and Q602 shown in Fig. 2-3.
Fig. 2-3
DC260 - 360V
Vd (DC)
Q601, Q602
Chopper interval
Current flowing
through reactor
(during high load)
Q601, Q602
Chopper interval
Current flowing
through reactor
(during low load)
Effective voltage
AC220-240V
Input voltage (AC)
Fig. 2-2
(3) Smoothing Capacitor (C019~022, 500µF, 450V)
Boosts and smoothes (averages) voltage rectified by the diode.
Reactor
Ｃ０１９ ＋
Microcomputer