GE PTV15SAMR, Technician Service Manual

Page: 32 / 85

Page 32
IX. FAILURE DIAGNOSIS
3. Fail to defrost
Confirm the frosting of the cooler
Clearance of door knob and forget
to close the freezing chamber door
Lesser frost
more frost
Is the coil circuit of D meter
working?
Replace D meter (broken coil)
No
Green & black circuit of D
meter
Turn the pin of D meter to defrost
side. Is the circuit of defrost heater
working ?
Replace D meter (poor operation of
D meter)
Yes
Defrost agent
Yes
Is the circuit at the defrost side of D
meter working?
Replace D meter, (poor contacting
point)
No
Green & black circuit of D
meter
No
Short circuit at the temperature
switch, is the circuit of defrost
heater working?
Is the circuit of water dripping tray
working?
Is the circuit of temperature fuse
working?
Is the circuit of defrost heater
working?
Clean the water and impurities in
the water dripping tray.
Yes
Yes
Yes
Yes
No
Replace the temperature switch
Replace the defrost heater
Replace the temperature fuse
Inspect the heater of water dripping
tray
No
No
No
Yes