1-16. 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 Load Operation Sequence Remark
INITIAL POWER ON
TEST MODE
Def sensor
Above 45°C
If error occurs
during operation,
initial operation is
not done.
•
If pressing sw
once more in the
test mode 2 or
temperature of
defrost sensor is
more than 5°c
it returns to the
test mode for
initial operation
(comp operates
after 7 minutes).
Def sensor
TEST MODE 1
TEST MODE 2
POWER
ON
COMP
ON
F-FAN
&
C-FAN
ON
STEPPING
MOTOR
ON
DEF HTR
OFF
DEF HTR
ON
DISP
HTR ON
DISP
HTR OFF
0.3
sec.
0.3
0.3
sec.
sec.
10
sec.
5
sec.
POWER
ON
5
sec.
PIPE
ON
0.3
sec.
COMP
ON
0.3
sec.
F-FAN
&
C-FAN
ON
0.3
sec.
STEPPING
MOTOR
ON
DUCT
HTR ON
TEST SW
(PRESS
Once)
OTHER
LOADS
OFF
COMP
ON
F-FAN
&
C-FAN
ON
STEPPING
MOTOR
OPEN
TEST SW
(PRESS
2 Times)
COMP
OFF
F-FAN
&
C-FAN
OFF
DEF
HEATER
ON
STEPPING
MOTOR
CLOSE
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
lower than
45°C (in
service)
PIPE HTR
ON
DUCT
HEATER
ON
0.3
sec.
: In case of the defrost sensor
Temperature: +5°C↓
It is a load
movement
sequence in
case of the F/R
room closed
- 17 -
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