Compressor Electrical; Compressor; Ptc-Starter/ Combo - Kenmore 795.75312.900 Service Manual

4.

COMPRESSOR ELECTRICAL

4-1 COMPRESSOR

4-1-1 Role
The compressor intakes low temperature and low pressure gas
from the evaporator of the refrigerator and compresses this gas
to high temperature and high pressure gas. It then delivers the
gas to the condenser.
4-1-2 Composition
The compressor includes overload protection. The PTC starter
and OLP (overload protector) are attached to the outside of the
compressor. Since the compressor is manufactured to
tolerances of 1 micron and is hermetically sealed in a dust and
moisture-free environment, use extreme caution when
repairing it.
4-1-3 Note for Usage
(1) Be careful not to allow over-current.
(2) If compressor is dropped or handled carelessly, poor
operation and noise may result.
(3) Use proper electric components appropriate to the particular
compressor in your product.
(4) Keep compressor dry.
If the compressor gets wet (in the rain or a damp environment)
and rust forms in the pin of the Hermetic Terminal, poor
operation and contact may result. If the hermetic connector
rusts out or fails, refrigerant and oil will be expelled into the
contact area, probably resulting in smoke and fire.
(5) When replacing the compressor, be careful that dust,
humidity, and soldering flux don´t contaminate the inside of the
compressor. Contamination in the cylinder may cause noise,
improper operation or even cause it to lock up.

4-2 PTC-STARTER/ COMBO

4-2-1 Composition of PTC- Starter
(1) PTC (Positive Temperature Coefficient) is a no-contact
semiconductor starting device which uses ceramic material
consisting of BaTiO .
3
(2) The higher the temperature is, the higher the resistance
value. These features are used as a starting device for the
motor.
4-2-2 Role of PTC-Starter
(1) The PTC is attached to the Sealed Compressor and is used
for starting the motor.
(2) The compressor is a single-phase induction motor. During
the starting operation, the PTC allows current flow to both the
start winding and main winding.
4-2-3 Combo TSD
TSD (Time Starting Device) is a new electronic starting system
for high efficiency compressors due to the following
characteristics:
(1) Combo concept-overload protector, electronic board and
cover in a single casing.
(2) Fully electronic concept.
(3) Full integration of starting and protection devices.
(4) Free from mechanical and electromagnetic noises.
4-2-4 Role of Combo TSD
(1) The combo is attached to the sealed compressor and is used
for the operation and protect the motor.
(2) The compressor is a single phase induction motor. During
the starting and operation, the combo allows current flow to both
the start and main winding.
4-2-5 PTC/Combo - Applied Circuit Diagram
Starting Method for the Motor
COMPRESSOR
ACCESORIES
CAPACITOR PART CAPACITOR PART
PK PK
Cr Cr
2 2
RD RD
4 4
3 3
BL BL
P.T.C P.T.C
PTC
DIAGRAM
* P.T.C OPTION * P.T.C OPTION
LD,LQ COMP' LD,LQ COMP'
2 2
4 4
5 5
6 6
3 3
COMBO KIT
DIAGRAM
* ALTERNATIVE COMP' * ALTERNATIVE COMP'
ACCESSORIES ACCESSORIES
CR CR
BL BL
N N
PTC PTC
- 14 -
S S BK BK
5 5
M M
GN GN
/YL /YL
6 6
(GN) (GN)
BL BL
COMP' EARTH COMP' EARTH
PART PART
EG COMP' EG COMP'
3 3
4 4
6 6
5 5
2 2
BK BK
L L
COMBO KIT COMBO KIT
(PTC+OLP) (PTC+OLP)