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55
CHECKING AND REPAIRING OF ELECTRIC PARTS
9
Operating Procedure
Photos
Fig.
1
Fig.
2
1) Measuring insulation resistance of indoor fan
motor
a
Remove the fan motor connector from PCB.
b
C o n n e c t c l i p t o t h e g r o u n d t e r m i n a l
c o n n e c t i n g G r e e n / Ye l l o w l i n e .
c
M e a s u r e i n s u l a t i o n r e s i s t a n c e b y c o n n e c t i n g
terminal of insulation ohmmeter to the arbitrary
fan motor connector. (Refer to fig. 1)
d
It is normal that insualtion resistance is over
1 M
Ω
.
2) Checking the winding of compressor motor
a . A f t e r r e m o v i n g t e r m i n a l c o v e r o f c o m p r e s s o r
m o t o r, s e t t h e r a n g e o f r e s i s t a n c e m e a s u r e m e n t
o f m u l t i m e t e r t o " x 1
Ω
" .
b . A m o n g t h e t e r m i n a l s , c h e c k t h e d i s c o n n e c t i o n
between two terminals (C R, C S)as shown
in fig. 2.
c . C h e c k t h e d i s c o n n e c t i o n b e t w e e n t w o t e r m i n a l s
(1 3) of Overload-protector of compressor motor.
d. It is normal if there is no disconnections.
3) Checking PCB for control by operating voltage
of fan motor
a . R e m o v e t h e c o n n e c t o r b e t w e e n P C B a n d f a n
m o t o r .
b. Assure that other parts are not short before
s u p p l y i n g p o w e r t o t h e u n i t .
c . O p e r a t e t h e u n i t a n d c h a n g e f a n s p e e d b y r e m o t e
c o n t r o l l e r.
d. It is normal that the voltage between the
connector pin (CN3, ) is measured as
over (line voltage - 50VAC). But, this test has to be
d o n e w i t h i n 1 m i n u t e .
Green/Yellow
Ground terminal
Compressor terminal
OLP
3
1
S
C
R
Multimeter
Summary of Contents for HWG195C
Page 36: ...35 CONTROL BLOCK DIAGRAM 6 1 42HWG007 009 012 018 024 HWG195C 225C 305C 455C 605C...
Page 37: ...2 42HQG007 009 012 018 024 HWG195 225 305 455 605H SERIES 36...
Page 43: ...b MAIN CONTROL PART 42HWG018 024 42HQG018 024 HWG455 605C HWG455 605H 42...
Page 45: ...c REMOTE CONTROL PART 44...
Page 48: ...47 c CONTROL PCB SOLDERING SIDE 42HWG018 024 42HQG018 024 HWG455 605C HWG455 605H...
Page 49: ...48 d CONTROL PCB COMPONENTS SIDE 42HWG018 024 42HQG018 024 HWG455 605C HWG455 605H...
Page 60: ...59 TROUBLE SHOOTING 10...
Page 64: ...EXPLODED DIAGRAM AND PARTS LIST 12 63...
Page 89: ...Carrier Corporation P N 42KG8K54600 Version 1 0...