Mitsubishi PUZ-A18NHA6 - Noise

74
CN2
Connecttotheoutdoorcontrollercircuitboard(CN2)
1–5:Outdoorpowercircuitboard→Transmittingsignal
totheoutdoorcontrollercircuitboard(0–5VDC))
2–5:Zerocrosssignal(0–5VDC)
3–4:Notused
6–5:16VDC
7–5:16VDC
Outdoor power circuit board
PUZ-A18NHA6
PUZ-A18NHA6-BS
PUY-A12/18NHA6
PUY-A12/18NHA6-BS
1,2,6,7:+
 5:–
]
[
LD1-LD2
280–380VDC
Connectto
theoutdoor
controller
circuitboard
(CNDC)
R,S
ConnecttotheACL
208/230VAC
U,V,W
Connecttothecompressor(MC)
Voltageamongphases:5to180VAC
LD9
Connectto
theearth
OnlyA24
CN5
Primarycurrentdetection
(Connecttotheoutdoor
noisefiltercircuitboard
(CN5))
CN4
Connectfromthe
outdoorcontroller
circuitboard
(CN4)
CN3
Thermistor
<Heatsink>
(TH8)
DIP-IPM
DIP-PFC
Brief check of DIP-IPM and DIP-PFC
Usually,theyareinastateofbeingshort-circuitediftheyarebroken.
Measuretheresistanceinthefollowingpoints(connectors,etc.).Ifthey
areshort-circuited,itmeansthattheyarebroken.
1.CheckofDIP-IPM
P-U,P-V,P-W,N-U,N-V,N-W
2.CheckofDIP-PFC
P-R,P-S,R-N,S-N
OCH577A