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11-9-5. Checking Method for Each Part
MCC-1438
Soldered
surface
Heat sink IGBT side
C10
C11
C12
C13
Tester rod
U
V
W
U
V
W
W
V
U
W
V
U
1M or more 100k to 300k
200k to 300k
Case that product is good
BZ BY BX
BW
BW
BZ
BV
BU
+
+
+
–
+
+
–
–
–
–
W
V
U
W
BV
BY
V
BU
BX
U
No.
1
2
Part name
Electrolytic capacitor
(For raising pressure,
smoothing)
IGBT module
Checking procedure
1. Turn OFF the power supply breaker.
2. Discharge all three capacitors completely.
3. Check that safety valve at the bottom of capacitor is not broken.
4. Check that vessel is not swollen or exploded.
5. Check that electrolytic liquid does not blow off.
6. Check that the normal charging characteristics are shown in continuity test by
the tester.
Case that product is good
Pointer swings once, and returns
slowly. When performing test
once again under another polarity,
the pointer should return.
C10, C11, C12, C13
→
500µF/400V
1. Turn OFF the power supply switch.
2. Discharge all four electrolytic capacitors completely.
3. Execute continuity test with a tester.
Summary of Contents for RAS-3M18SACV-E
Page 21: ... 21 4 2 Outdoor Unit RAS 3M18SAV E RAS 3M18SACV E ...
Page 110: ... 110 MCC 1438 ...
Page 111: ... 111 MCC 818 ...
