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5.2.

FC Defrost Control

Cumulating the compressor running time of certain period
or time after defrosting according to room temperature and
ATC temperature, defrosting cycle starts.

Maximum defrosting time is 60 minutes.

5.3.

3-Way Valve Control

Cooling Mode Change Control is controlled by detected
temperature of PEC, FCC, PCC, SCC.

5.3.1.

Operation condition of 3-Way Valve

1. In case PEC sensor temperature is 4

C or above

• PEC sensor temperature is Turning on temperature

(ON temperature) or above------------ PC cooling mode

• PEC sensor temperature is Turning off temperature

(OFF temperature) or below----------- FC cooling mode

2. In case PEC sensor temperature is less than 4

FC Cooling Mode is set.
However, PC Cooling Mode is set, until PCC sensor
temperature is become OFF temperature during PC
Cooling Mode.

3. During FC Cooling Mode

FCC sensor temperature is OFF temperature or below
------------------------- Compressor off mode

4. However, during FC Cooling Mode, though FCC sen-

sor temperature is OFF temper below, there is a case
not to become Compressor OFF Mode, according to
VC setting.

5. However, PC Cooling Mode is forcibly ended when

reaching at time PC Cooling Mode below. (Forcible
OFF Cycle Defrost)
When condition of PC Cooling Mode is satisfied as
above mentioned, it is shifted to PC Cooling Mode.

When power is turned on: Forcible OFF Cycle Defrost is
started from Defrost stopping.
    Normal Time:
             PC Cooling Mode is continuously for 10 hours.
                 PC Cooling Mode is reset at the same time with
                  Time Rest

5.3.2.

3-Way Valve Control when power is
turned on

It is FC Cooling Mode from power turning on to 15 minutes,

PC Cooling Mode from 15 minutes to 40 minutes, to be nor-

mal 3-Way Valve Control after 40 minutes.

5.3.3.

Setting operation: Refrigerant
Cycle pattern is changed by 3-Way
Valve position

Basically 3-Way Valve operation of each Mode as shown
below.

5.3.4.

Initial Control of 3-Way Valve

When power is turned on, Initial Control of 3-Way Valve is
done.
Initial Control: 3-Way Valve is opened towards PC side
(Positive pulse 5 times), then 1 second after that, it is
opened toward FC side (Negative pulse 5 times).

5.3.5.

Evacuation Mode

When power is turned on, Initial Control of 3-Way Valve is
done.
Starting: The valve is opened toward PC side of 3-Way
Valve when “Freezer set button” is pressed on Self-Diag-
nosis Mode*.
And “P” “FU” characters are displayed on the control
panel.

•

Self-Diagnosis Mode can be started when “Super Freeze
button” on the control panel is pressed more than 5 sec-
onds.

Ending: Press “Freezer set button” again, then Evacuation
Mode is ended and Self-Diagnosis Mode appear again.
During Evacuation Mode, to press “Super Freeze button”
the Mode is ended.
Or 7 minutes after starting the Self-Diagnosis Display Con-
trol, at the same time Self-Diagnosis Mode is ended too.

Cumulating time for defrosting

4 hours Initially started

Cumulating com-
pressor running
time

8 hours When room and ATC temp. is 25

or above

12 hours When room temp. is 19

C or above

Cumulating time
after defrosting

28 hours When room temp. is 18

C or below

Basic Mode

3-Way Valve