Mitsubishi PUZ-A18NHA6 - Test Point Diagrams

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10-9. TEST POINT DIAGRAM
Outdoor controller circuit board
PUZ-A18/24/30/36/42NHA6 PUZ-A18/24/30/36/42NHA6-BS
PUY-A12/18/24/30/36/42NHA6 PUY-A12/18/24/30/36/42NHA6-BS
<CAUTION>TESTPOINT1ishighvoltage.
Communicationpowersupply
D71Voltage
24VDC
CNS
S1–S2:A208/230VAC
CNAC
2–4:
Powersupplyforout-
doorcontrollercircuit
board(208–230VAC)
1–3:
Powersupplyforindoor
andoutdoorunitcon-
nectionwire
(208/230VAC)
CNF1,CNF2
Connecttothefanmotor
1–4:280VDC
5–4:15VDC
6–4:0–6.5VDC
7–4:15VDC(Whenstopped)
7.5VDC(Whenoperated)
(0–15Vpulse)(CNF2isonlyforA42)
21S4
4-wayvalve
(PUZonly)
63H
Highpressureswitch
SV2
Bypassvalve
(A24/30/36only)
CN4
Transmissiontoout-
doorpowercircuit
board(CN4)
SW4
Testoperation
SW6
Modelselect
SW5
Functionswitch
SW1
Manualdefrost,detecthistoryrecordreset,refrigerantaddress
CNDM
1–2:
Inputoflow-level
soundprioritymode
1–3:
Inputofexternalcon-
tactpoint
TH3
Thermistor
<Liquid>
TH7/6
Thermistor
<Ambient/2-phasepipe>
CNDC
280VDC(1+,3−)
(Outdoorpowercircuit
board)
+−
VFG
(TESTPOINT4)
(Voltagebetween
rightpinsofPC5C
andPC5D,pin3
andpin4)
(Sameas
(CNF1
7(+)–4(−))
VSP
(TESTPOINT3)
(Voltagebetweenpins
ofC5A,C5B):
0VDC (whenstopped),
1–6.5VDC
(whenoperated)
SW7
Demandcontrolsetting
CN51
Externalsignaloutput
•Compressoroperating
signal
•Abnormalsignal
LEV-A
Linearexpansion
valve
SWP
Pumpdown
SW8
Wiringreplace
CNM
ConnecttoAcontrol
servicetool
CNMNT
Connectto
M-NETadapter(CN5)
CNVMNT
Connectto
M-NETadapter(CND)
CN2
Connecttotheoutdoor
powercircuitboard(CN2)
1–5:Receptionfrom

powercircuitboard
2–5:Zerocrosssignal
 (0–5VDC)
3–4:
18VDC
6–5:16VDC
7–5:16VDC
CN52C
(Connecttothenoise
filtercircuitboard
(CN52C))
63L
Lowpressureswitch
TH32
Thermistor<Comp.surface>
TH33
Thermistor<Suction>
OCH577A