Hitachi RAC-EH24WHLAE - Page 79

１２Ｖ
Ｒ８０１
Ｃ８０７
０Ｖ
Ｌ８０１
１２Ｖ
Ｃ８０４
Ｃ８０３
Ｒ８０４
Ｒ００４
Ｃ８０２
Ｑ９０３
Ｑ９０６
Ｑ９０１
Ｑ９０４
Ｑ９０２
Ｑ９０５
ＲＬ４
ＴＨ００１
Ｃ００６Ｃ００７
N
RED
Ｒ０３０
Ｃ００３
ＮＦ１
Ｆ４
TERMINAL
BLOCK
GRN1
GRN2
MAIN BOARD
リアクタ
５．３ｍＨ
Ｃ００１
Ｌ００１
Ｃ０１２
Ｃ００２
Ｃ０１４ Ｃ０１３
ＶＳ１
ＶＳ２
０Ｖ
ＣＴ１
Ｃ００９
０Ｖ
ＳＡ
Ｌ００２
Ｃ０１１
Ｃ００４Ｃ００５
ＶＳ５
Ｆ１
Ｑ６０２
Ｑ６０１
Ｄ６０１
Ｄ６０２
ＪＷ６０１
Ｄ６０３
Ｄ６０４
Ｃ０２１
Ｃ０２２
Ｃ０３２
Ｒ６０１
Ｃ６０４
Ｒ６０２
Ｒ６０３
Ｒ６０４
Ｒ６０５
Ｒ６０６
Ｗ Ｈ １ ５
ＷＨ１２
WＨ３
Ｗ Ｈ６
WＨ７
WＨ１２−２WＨ１２−１
WＨ４
WＨ５
Ｗ Ｈ １ ６
1
３
５
WＨ８
WＨ９
ＷＨ−Ｅ−８
ＷＨ−Ｅ−７
ＷＨ−Ｅ−６
ＷＨ−Ｅ−５
ＷＨ１０１
ＷＨ１０２
Ｃ９４０
Ｒ０１０
Ｒ０１１
Ｒ０１２
Ｒ０１３
Ｒ０１４
Ｒ０１５
ＤＢ６０２
Ｕ
Ｖ
Ｗ
WHT
RED
YEL
COMPRESSOR MOTOR
ＷＨ−Ｅ−１
ＷＨ−Ｅ−２
ＷＨ−Ｅ−３
ＷＨ−Ｅ−４
Ｆ５
Ｆ６
ＷＨ２
ＷＨ１
ＷＨ１１
ＷＨ−Ｅ−9
ＪＷ６０２
ＪＷ６０３
L
3
2
1
WHT
BLK
BRN
BLU
WＨ10
This circuit rectifies the AC voltage 230V applied between terminal L and N and
creates a DC voltage.
1. Power Circuit.
The voltage become 320-360V when the compressor is operated.
Importance components.
(1) Inverter circuit for compressor (Q901 to Q906).
The elements constitute the inverter part.
<Reference>
When the inverter circuits for compressor (Q901 to
Q906) have a failure or improper connection, the
compressor may stop immediately after its starts,
due to “Abnormal low speed”, “Switch failure”,
“IP Stop”, etc.
(2) Diode stack (DB602).
The diode stack rectify AC Voltage 230V applied
between the Terminal board L and N to DC Voltage.
<Reference>
When the diode stack (DB602) has failure, DC voltage
can not be generated, completely disabling the
operation of the compressor. Also note that 2A fuse
may have blown.
(3) Smoothing capacitor (C021 to C022, 610uF,450V).
<Reference>
The smoothing capacitor smoothes (average)
voltage rectifier by the diode bridge.
(4) IGBT for the power factor improvement (Q601).
<Reference>
It will improve efficiency during compressor load
become heavy when current flow thru the chopper
period of Q601.
(5) Surge absorber, varistor 1 and 2.
The surge absorber and varistor absorb exogenous
surge, including inductive lightning.
<Reference>
Be sure to ground the surge absorber and varistor.
without grounding, the surge absorber and varistor
do not operate normally.
(6) Noise filter (C001,C002,C006,C007,C013,C014,
NF Coil).The noise filter absord electrical
noise generated when the compressor operates
and when exogenous noiseis mixed through the
power line.In order to protect electronic parts.
<Reference>
Without grounding, the noise filter on the left
do not operated normally.
Fig.1-1
MODEL: RAC-EH18WHLAE,RAC-EH24WHLAE
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