Mitsubishi PUZ-A18NHA6 - Noise

75
TABP
Connecttothe
smoothingcapacitor
CB+
(A42Nonly)
Outdoor power circuit board
PUZ-A30/36/42NHA6
PUZ-A30/36/42NHA6-BS
PUY-A30/36/42NHA6
PUY-A30/36/42NHA6-BS
TABP1
Connectto52C
TABP2/SC-P2
Connectto
ACTM
CN4
Connecttothe
outdoorcontroller
circuitboard(CN4)
CN2
Connecttotheoutdoorcontrollercircuitboard
(CN2)
1–5:Transmittingsignaltotheoutdoor
 controllercircuitboard(0–5VDC)
2–5:Zerocrosssignal(0–5VDC)
3–4:18VDC
6–5:16VDC
7–5:16VDC
CN3
Thermistor(TH8)
<Heatsink>
CN5
Detectionofprimary
current
Connecttothe
outdoornoisefilter
circuitboard(CN5)
CNDC
280–380VDC(1+,3−)
Connecttotheoutdoor
controllercircuitboard
TABS/TABT
Connecttothe
outdoornoisefil-
tercircuitboard
Voltageamong
phases:208/230
VAC
Brief check of POWER MODULE
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diodebridge
TABP1-TABS,TABN1-TABS,TABP1-TABT,TABN1-TABT
2.CheckofDIP-IPM
 P-U,P-V,P-W,N-U,N-V,N-W
TABN2
ConnecttoACTM
TABN
Connecttothe
smoothingcapacitor
CB–
(A42Nonly)
TABU/V/W
Connecttothecompressor(MC)
Voltageamongphases:10–180VAC
TABN1
Connectto
ACTM
DIP-IPM
CNAF
ConnecttoACTM
OCH577A