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Verfügbare Sprachen
Verfügbare Sprachen
MODEL
RAM-80QH1
Configuration of Circuits
@ The RAM-80QH1
includes circuits for indoor units 1 and 2 (circuit A) and circuits for indoor units 3 and 4
(circuit B). Circuits
A and B have the same
internal configuration.
@ Only circuit A supplies power voltage and control signals to the outdoor DC fan motor control circuit.
®@ Since circuits A and B are independent of each other, their OV levels are different.
® The information on outdoor DC fan control, etc. is communicated
between circuit A (main) and circuit B
(sub) via the interface circuit (PQ201) between outdoor microcomputers.
@ Both circuits A and B have self-diagnosis indicators.
1. Power Supply Circuit
Reactor
5
Power relay
R716 R717
'In-rush
prevention | 2.5yF
' 400V
relay
3.15A fuse
Vd DC voltage
1
ACT P.W.B.
®@ This circuit full-wave
rectifies 220-240V AC applied between
the L and N terminals to create 300-380V
DC
(active filter operation).
@ The active filter consists of a 0.35mH
reactor and circuits on the ACT P.W.B. Its operation is controlled
by the semiconductor switching devices so the input current is proportional to the sine-wave voltage, and
reduces harmonic current.
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