GE PTV15SAMR, Technician Service Manual

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Page 19
V. FUNCTIONS
5.1.3 The following circuit diagrams in the table show automatic defrosting function of the refrigerator
with timer and defrost thermostat.
Operation Electric diagram Description
1. Cooling (Normal)
· Defrost thermostat ON
· Compressor running
· Timer motor running
Figure F-1
The integration timer
integrates running time of
the compressor. When it
reaches 8 hours 50 min. at
50Hz (10 hours 50 min at
60Hz), the timer contact is
changed to start
defrosting.
2. Defrosting
(Time 20 to 30 min)
· Defrost thermostat ON
· Compressor stops
· Timer motor stops
Figure F-2
· The timer contact is
changed to start
defrosting, the timer
motor stops, and power
is supplied to the defrost
heater.
· It takes about 20 to 30
min. to defrost. When
little frosted the
defrosting takes little
time. When much
frosted, the defrosting
takes much time.