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56
OCH751
Brief Check of POWER MODULE
If they are short-circuited, it means that they are broken.
Measure the resistance in the following points (connectors, etc.).
1. Check of Diode (DB1, DB2)
P - R , P - S , N - R , N - S
2. Check of Q1
P - N
3. Check of IPM
P - N , P - U , P - V , P - W , N - U , N - V , N - W
P-N keeps being shirt-circuited until the smoothing condenser is
charged by a tester.
10-8. TEST POINT DIAGRAM
Outdoor controller circuit board
Note: PUZ-ZM35/50 checks solder side.
AC in (L, N)
L
Communication power supply
Voltage
28 VDC
− +
CN51
External signal output
• Compressor operating signal
• Abnormal signal
LEV-A,B
Linear expansion valve
CNF1
Connect to the fan motor
1
–
4
: 250–330 VDC
5
–
4
: 15 VDC
6
–
4
: 0–6.5 VDC
7
–
4
: 15 VDC (When stopped)
7.5 VDC (When operated)
(0–15 V pulse)
TH4
Thermistor
<Discharge>
TH3
Thermistor
<Liquid>
TH7/6
Thermistor <Ambient/2-phase pipe>
TH33
Thermistor <Comp. surface>
7
6
5
4
1
63H
High pressure switch
V
SP
(Voltage between pins of C5A, C5B):
0 VDC (when stopped),
1–6.5 VDC (when operated)
Connect to compressor
(U, V, W)
Voltage among phases 5–180 V
CN3
Thermistor <Heat sink> (TH8)
IPM
P U V W N
P N
Q1
Connect to AC Reactor
21S4
4-way valve
CNMNT
Connect to
M-NET adapter (CN5)
CNVMNT
Connect to
M-NET adapter (CND)
<CAUTION> TEST POINT CNF1
1
is high voltage.
Note: The marks, P , N , R , S , U , V and W shown in the diagram
are not actually printed on the board.
N R S P
P
R
S
N
N
Diode (DB1)
Diode (DB2)
Содержание WSH-ZM35I BEDRAAD SET
Страница 16: ...16 OCH751 6 OUTLINES AND DIMENSIONS Unit mm ...
Страница 17: ...17 OCH751 7 WIRING DIAGRAM ...