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Control
NO.
Function
6
Fuzzy
7
Determination
defrost
Control
Objects
COMP.
1. When press the fuzzy button, predictable cooling of freezer
R-fan
and fridge room is started.
F-fan
LED
FUZZY
2. How to predict freezer and fridge room temperature.
1) Checking accumulated door open time every 2 hours.
2) Decision of open door frequency is as follow
• Above 30 sec. : Door is opened frequently. (1)
• Below 30 sec. : Door is not opened frequently. (0)
3) Decision of data is for 8 days.
• If the accumulated open door time of 30 sec. is more
than 6 times for 8 days, then data decision will be high.
• If RT-sensor<14˚C, it is operated mid instead of high.
4) Example
Hour
Date
1
2
3
4
5
6
7
8
Frequency
Data decision M
1. Necessary condition of determination defrost
1) COMP. operation accumulation time (6, 9, 12, 15 hours)
2) COMP. operation ratio (COMP. accumulation time is divided
by 3 hours)
3) Door open accumulation time.
4) Total time (COMP. on time+COMP. off time) is 60 hours.
5) Outside temperature is above 35˚C.
6) Various error
• D-sensor error
• F-sensor error
• RT-sensor error
• Door switch error
Contents
TEMP
FRZ.
E.F
TIME SET
1
2
3
Q.F
FUZZY
SURROUND
CLEAN
2
4
6
8
10 12 14 16 18 20 22 24
1
0
1
1
1
0
0
0
1
1
1
0
0
0
1
1
1
0
0
1
1
1
0
1
0
0
0
0
1
0
1
0
1
1
0
0
0
1
1
1
0
0
1
0
1
1
1
0
3
2
7
7
5
1
M
H
H
M
M
36
QUICK
QUICK
REF.
E.R
1
FREEZING
REFRIGERATION
2
3
Q.R
0
0
1
1
0
0
0
0
1
0
0
1
1
0
1
1
1
1
1
0
0
1
1
1
1
0
1
0
1
0
1
1
1
0
1
0
1
1
1
1
2
6
6
6
4
M
H
H
H
M
M
Remark
1
1
0
0
0
1
0
1
4
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