Samsung AM160FNBFEB/EU, Руководство по обслуживанию

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T ro u b l eshootin g
4-1 2 6 S a m s u n g El e c troni c s
4-4-8 3 Inv erter O v er h eat error
Ou tdoor u nit
disp l a y
(I N VE R TE R 1 P CB )
(I N VE R TE R 2 P CB )
Ju d g m ent
Method
∙ IGBT m od ul e interna l te m perat u re :
10 5 °C m ore than (E 5 00, E400 )
C a u se o f
pro b l e m
∙ C oo l in g Pin and the IGBT ju n c tion part asse mb ly
de f e c ti v e .
∙ R e f ri g erant c oo l in g heat sin k and re f ri g erant pipin g
asse mb ly de f e c ti v e .
∙ A sse mb l ed b o l t de f e c ti v e .
B oth end resistan c e v a lu es o f IGBT m od ul e pin (8, 9 pin )
1 . C a u se o f pro b l e m
T e m perat u re [°C] N TC [ oh m ] A D [V]
10 9000 2 . 5 8
2 0 6000 2 . 33
3 0 4000 2 . 0 3
40 3 000 1 . 80
5 0 2 000 1 . 47
60 1600 1 . 2 9
70 1 2 00 1 . 07
80 7 5 0 0 . 76
90 6 5 0 0 . 68
C o m p l ete
Y es
Y es
Y es
A pp ly the heat sin k g rease and then reasse mb ly .
No Did proper ly app ly the heat sin k g rease ?
(B et w een the heat sin k and the I PM )
Y es
T i g hten B o l t (S c re w)
R e m o v e f orei g n o b j e c ts and app ly the heat sin k
g rease . A nd then reasse mb ly
No
No
I s the b o l t o f the heat sin k f ully ti g htened ?
Did c he ck the f orei g n o b j e c ts b et w een the heat sin k
and I PM ?
R ep l a c e I n v erter P CB .
: E 5 00(B otto m ) , E400 (T op )
No
I PM (IGBT ) m od ul e pin 8, 9 :
I s it nor m a lly b oth end resistan c e v a lu e ?
Po w er O ff
T e m perat u re [°C] N TC [ oh m ] A D [V]
100 5 00 0 . 55
10 5 4 5 0 0 . 5 1
110 3 80 0 . 44
1 2 0 3 00 0 . 3 5
1 3 0 25 0 0 . 3 0
140 2 00 0 . 25
* E n f or c e the dis c har g e m ode b e f ore Po w er O ff.
(K 2 : press the 6 ti m es )
G ood No G ood
IGBT m od ul e pin 8, 9