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<Reference>
This circuit full-wave rectifies 220-230V AC applied between terminals L and N, and boosts it to a required voltage with the
active module, to create a DC voltage.
The voltage becomes 320-360V when the compressor is operated
(1) Active module
The active filter, consisting of a reactor and switching
element, eliminates higher harmonic components
contained in the current generated when the
compressor is operated, and improves the
power-factor.
In case of malfunction or defective connection:
Immediately after the compressor starts, it may stop due
to "abnomally low speed" active error, etc.
The compressor may continue to operate normally, but
the power-factor will decrease, the operation current
will increase, and the overcurrent breaker of the
household power board will probably activate.
In case of active module faulty or defective contact:
Although the compressor continues to operate normally,
the power-factor will decrease, the operation current
will increase, and the overcurrent breaker of the
household power board will probably activate.
<Reference>
If diode stack 1 is faulty, the compressor may stop due
to "Ip", "anbormally low speed", etc. immediately after it
starts, or it may not operate at all because no DC voltage
is generated between the positive + and negative -
terminals.
If diode stack 1 is faulty, be aware that the 25A fuse
might also have blown.
If diode stack 2 is faulty, DC voltage may not be
generated and the compressor may not operate at all.
Also, be aware that the 3A fuse might have blown.
(2) Diode stacks
These rectify the 220-230V AC from terminals L and N
to a DC power supply.
1. Power Circuit
MODEL RAC-50WX8, RAC-D18EX3
MAIN P.W.B.
TERMINAL
BOARD
L
N
25A FUSE
3A FUSE
PO
WER CIRCUIT
NF COIL1
COIL
POWER RELAY
R509
R007
ICP RELAY
TB8
REACTOR
TB2
TB7
TB6
TB5
TB10
TB11
TB12
TB4
C101
+
R008
R002
C007
C007
C012
C013
C014
+
+
C015
L001
L002
0V
0V
CT1
C002
R001
C001
C006
C518
C519
C011
R011
C010
R010
VARIST
OR1
VARIST
OR2
VA
RIST
OR3
SURAGE-
ABSORBER
DIODE
STACK2
DIODE
STACK1
(D25VB60) +
-
SPM2
Fig. 1-1