ADJUSTMENT
1. COMPRESSOR3) PTC-Applied Circuit Diagram
According to Starting Method for the Motor
1) Role
The compressor intakes low temperature and low pressure
OVERLOAD
gas evaporated from Evaporator of the Refrigerator, andPROTECTOR(O.L.P)
condenses this gas to high temperature and high pressure
gas, and then plays delivering role to Condenser.C
2) Composition
COMPRESSOR
PTC
S
The Compressor is Composed of Compressor ApparatusMOTOR
compressing gas, Compressor Motor moving CompressorSM
M
Apparatus and Case protecting Compressor ApparatusS
3M
and Motor. There is Relay Assembly (one set of PTC-
Starter and Over Load Protector (OLP)) in Compressor. On
PTC STARTERHERMETIC
the other hand, because the Compressor consists ofTERMINAL
RSIR
1/1000mm processing precision components and is sealed
after production in absence of dust or humidity, deal andRELAY ASSEMBLYFigure 19
repair with care.
3) Note for Usage4) Motor Restarting and PTC Cooling
(1) Be careful not to allow over-voltage and over-current.
(1) For restarting after power off during normal
(2) No Strike Compressor Motor operation, plug the power cord after
If applying forcible power or strike (dropping or careless5 min. for pressure balance of Refrigerating Cycle and
dealing), poor operation and noise may occur.PTC cooling.
(3) Use proper electric components appropriate to the(2) During normal operation of the Compressor Motor, PTC
Compressor.elements generate heat continuously. Therefore,
if PTC isn't cooled for a while after the power has been
(4) Note to Keep Compressor.
shut off, Motor can't operate again.
If Compressor gets wet in the rain and rust in the pin of
Hermetic Terminal, the result may be poor operation5) Relation of PTC-Starter and OLP
and poor contact may cause.
(1) If the power is off during operation of Compressor and
(5) Be careful that dust, humidity, and flux welding don'tthe power is on before the PTC is cooled, (instant shut-
inflow in the Compressor inside in replacing theoff within 2 min. or reconnect a power plug due to
Compressor. Dust, humidity, and flux due to weldingmisconnecting), the PTC isn't cooled and a resistance
which inflows to Cylinder may cause lockage and noise.value grows. As a result, current can't flow to the sub-
coil and the Motor can't operate and the OLP operates
by flowing over current in only in the main-coil.
2. PTC-STARTER(2) While the OLP repeats on and off operation about 3-5
times, PTC is cooled and Compressor Motor performs
1) Composition of PTC-Starternormal operation.
(1) PTC (Positive Temperature Coefficient) is a no-contactIf OLP doesn't operate when PTC is not cooled,
semiconductor starting device which uses ceramicCompressor Motor is worn away and causes circuit-
material and this material consists of BaT3.iOshort and fire. Therefore, use a properly fixed OLP
without fail.
(2) The higher the temperature is, the higher becomes the
resistance value. These features are used as starting6) Note to Use PTC-Starter
device for the Motor.(1) Be careful not to allow over-voltage and over-current.
2) Role of PTC-Starter(2) No Strike
(1) PTC is attached to Hermetic Compressor used forDon't apply a forcible power or strike.
Refrigerator, Show Case and starts Motor.(3) Keep apart from any liquid.
(2) Compressor for household refrigerator applies toIf liquid such as oil or water away enter the PTC,
single-phase induction Motor. PTC materials it may break due to insulation
For normal operation of the single-phase inductionbreakdown of the material itself.
motor, in the starting operation flows in both main coil(4) Don't change PTC at your convenience.
and sub-coil. After the starting is over, the current inDon't disassemble PTC and mold. If the exterior to the
subcoil is cut off. The proper features of PTC play allPTC-starter is damaged, resistance value is altered and
the above roles. So, PTC is used as a motor startingit may cause poor starting of the compressor motor
device.may cause.
(5) Use a properly fixed PTC.
- 12 - |
ACEC
