Carrier 38NYV025M, Руководство по обслуживанию, Страница: 75 / 91

FILE NO. SVM-07009
– 75 –
1
Electrolytic capacitor (For
raising pressure, smoothing)
2
Rectifier
11-8-6. Checking method for each part
No. Part name Checking procedure
1. Turn OFF the power supply breaker.
2. Discharge all four 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 tester shows the normal charging characteristics in
continuity test.
C12, C13, C14
→
500
µ
F/400V
1. Turn OFF the power supply breaker.
2. Discharge all three capacitors completely.
3. Check that the normal rectification characteristics are show 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.
Diode check
Tester rod
e d
d
e
\
1
~
Resistance value
in good product
50k
Ω
or more
(0
Ω
in trouble)
\
2
~
\
1
~
\
2
~
Mark
1 2
1 2
C12
C13
MCC-
5009
Soldered
surface
Heat sink IGBT side
C1
4