25
NO.
Control Control
Contents Remark
Function Objects
8 Determination
of
defrost
9 Defrost COMP.
function F-fan
C-fan
R-fan
Heater
1. Defrost function is started by the following 4 conditions.
Condition 1 : Accumulated COMP. on time (MAX. and MIN.
time)
Condition 2 : Accumulated door open time (different from the
accumulated door open time in fuzzy function)
Condition 3 : COMP. operation ratio (calculated by the time
divided by 150 min. after defrost)
Condition 4 : The door open data every 2 hours interval same
as fuzzy function
2. Method of determination defrost
¢…
Order of judgement
1) In , it goes directly to defrost mode if the COMP.
operation ratio from to is over 80%.
2) In , it goes directly to defrost mode if the COMP.
operation ratio from to is over 80%.
3) In , it enters to defrost mode unconditionally.
1. Defrost step
E
D
B
D
C
B
C
Pre-cool
R-fan D-heater
Pause Fan delay
defrost defrost
COMP.
on off off off on
F-fan
on off off off off
R-fan
on on off off off
D-heater
off off on off off
End of
defrosting
A
For
150 min.
B
MIN. time
(5 hours)
C
Accumulated door
open time (10 min.)
D
MAX. time
(8 hours)
E
➧
Time : 30 min.
➧
Quick mode
is prior
➧
Time : 10 min.
➧
Regardless of
door open
➧
If D-sensor
temperature
is over 10˚C,
R-fan goes off
and it skips to
pause step.
➧
Defrost is prior
➧
Time : 90 min.
➧
If D-sensor
temperature
is over 10˚C,
D-heater goes
off.
➧
If D-sensor is
in error, it is
on for 45 min.
unconditionally
➧
Defrost is prior
➧
Time : 7 min.
➧
Defrost is prior
➧
Time : 5 min.
➧
Defrost is prior
