Defrost Control - Samsung AS09HPBN Training Manual

6-2-11 Defrost control

Defrost operation is controlled by sensing the temperature of indoor heat exchanger.
N How to sense defrost conditions
A condition
The temperature of indoor heat exchanger is checked in intervals of 1 minute. In case the temperature of indoor heat exchanger drops below
0.5°C for 6 minutes, it is considered as one cycle. If it happens 3 times continuously, It is said that "A condition" is satisfied.
B condition
If the temperature of indoor heat exchanger is below about 40±3°C when the compressor is on, it is considered as defrost "B condition"
C condition
When the accumulating time of compressor ON is over 20 minutes.
D condition
When the accumulating time of compressor ON is over 3Hr.
E condition
When operating time of compressor without stopping is over 6 minutes.
F condition
If the compressor is off(thermo off) when the temperature of indoor heat exchanger is below about 46°C, it is considered as one cycle.
If it happens 2 times continuously, It is said that "F condition" is satisfied.
G condition
When the accumulating time of compressor ON is over 90 minutes.
N Defrost operation conditions
A✕B✕C condition or
B✕D✕E condition
F✕G condition
Defrost time : 5~8 minutes
N Operation pattern
Defrost
Compressor
Outdoor Fan
4Way Valve
Indoor Fan
Samsung Electronics
Defrost Time
1min
ON
OFF
ON
OFF
ON
55sec
ON
ON
OFF
more than 58sec
2sec
55sec
OFF
1min
OFF
Feature & Operation
ON
Thermo ON
ON
Setting Speed
Low Speed
41