– 44 –
IPM
POWER P.W.B.
N.F. FILTER
ICP CIRCUI
T
SWITCHING
POWER SUPPLY.
REVERSING VALVE
CONTROL CIRCUIT
ELECTRIC EXPANSION VALVE
CONTROL CIRCUIT
INTERFACE
CIRCUIT
A
B
C
D
MAIN P.W.B.
RECTIFIER
INVERTER
CONTROLCIRCUIT
COMPRESSOR
INVERTER CIRCUIT
SMOOTHING
CAPACITOR
HARMONICS
IMPROVEMENT
CIRCUIT
RESET
CIRCUIT
POSSITON
DETECTIVE
CIRCUIT
MICRO
COMPUTER
FAN MOTOR
CONTROL
CIRCUIT
THERMISTOR
DETECTION
CIRCUIT
MODEL RAC-
18YH4
1. The electrical parts for the outdoor unit is composed of two P.W.B (a power P.W.B. and main P.W.B.)
and a harmonics improvement circuit as shown in Fig. 1-1.
•
This P.W.B. is equipped with the rectification diode, DC fan motor control circuit and the circuits
around the micro computer which take various controls.
•
POWER P.W.B.
This P.W.B. is equipped with the noise filter, ICP power circuit, interface circuit, smoothing capacitor,
expansion valve control circuit and four-way valve control circuit.
•
HARMONICS IMPROVEMENT CIRCUIT
This circuit is composed of the capacitor at the bottom of the electrical parts box and two reactors
attached to the BULKHEAD.
Fig. 1-1
MAIN P.W.B.
Summary of Contents for RAC-18YH4
Page 21: ... 19 GRAM 18YH4 RAC 18YH4 CAUTION The marked parts are very important ones for safety ...
Page 23: ... 21 RAS 18YH4 MODEL ...
Page 24: ... 23 RAC 18YH4 MODEL Ｈ８ ３ ０ ３ ９ ＡＸ ８ Ｔ １ ０ ...
Page 27: ... 26 MAIN P W B MARKING ON P W B COMPONENT SIDE SOLDERING SIDE MODEL RAC 18YH4 ...
Page 29: ... 29 button MODEL RAS 18YH4 BASIC MODE 31 33 33 33 37 35 ...
Page 35: ... 38 REFRIGERATING CYCLE DIAGRAM MODEL RAS 18YH4 RAC 18YH4 SUCTION TANK SUCTION TANK ...
Page 99: ...Printed in Japan TSK AW NO 0004E RAS 18YH4 RAC 18YH4 ...
