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MICOM FUNCTION
2-9. Frost
removal
function
1. Frost removal is performed whenever total operation time of compressor becomes 7 ~ 7.5 hour.
2. In providing initial power (or returning power failure), frost removal starts whenever total operation time of compressor
becomes 4 - 4,5 hour.
3. Frost removal is completed if temperature of a frost removal sensor becomes more than 5°C after starting frost removal.
Poor frost removal is not displaced if it does not arrive at SoC even if two hours have passed after starting frost removal
4. No removal is done if frost removal sensor becomes poor (snapping or short-circuit).
2-10. Sequential
operation of built-in product
Built-in products such as compressor, frost removal heater, freezing room fan, Cooling Fan and step motor damper are
sequentially operated as follows for preventing noise and part damage occurred due to simultaneous operation of a lot of
parts in applying initial power and completing test.
Function
When temperature
ofa frost removal
sensorbecome3
more than 25°C
(In p urchase,
movement)
When
_
temperature of a
5
frost removal
sensor becomes
-=-
less than 25°C
_--
(In power failure,
"_
service)
Testmode 1
(Compulsory
funotion)
-.d
m
b9
-H
O
Test mode 2
m
(Compulsory frost
removal)
Load Operation Sequence
0.5
0.3
F-FAN
0.3
STEP
0.3
HOME
POWER
sec.
COMP
sec.
sec.
sec.
i
_
_
&
_
MOTOR
_
BAR
C-FAN
DAMPER
HEATER
i
;
ON
ON
ON
ON
ON
0.5
FROST
8
FROST
0.3
HOME
5
HOME
POWER
sec. REMOVAL sec. REMOVAL sec.
BAR
sec.
BAR
ON
HEATER
HEATER
HEATER
HEATER
ON
OFF
ON
OFF
i
WATER
0.._ WATER
5
WATER
= O.3 SUPPLY
5
O.3
F-FAN
sec.
sec.
sec,
COMP
sec.
_ec TANK
_
TANK
&
&
--
HEATER
HEATER _
DISPENSE -_
"-->
C-FAN
ON
OFF
HEATER
ON
ON
ON
0,3
0.3
F-FAN
0.3
STEP
TEST
OTHER
sec.
COMP
set:,
sec.
S/W
_
LOAD
_
_
&
___
MOTOR
(Press
OFF
ON
C-FAN
DAMPER
Once)
ON
OPEN
TEST
COMP
o.3
F-FAN
o.3
FROST
0,3
STEP
S_C.
S/W
_
_
&
_;
REMOVAL _
MOTOR
(Press
OFF
C-FAN
HEATER
DAMPER
2 times)
OFF
ON
CLOSE
Remark
If errorescors
during operation,
initial o perationis
not done.
If pressingswitch
once more in the
test mode 2 or
temperature of a
frostremoval
ser_or is mona
than 5°C, it
immediately
returns to the test
mode for inilial
operation
(COMP operates
aifer 7 minutes).
-28-
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