P a g e
19
PRINTED : JAN’2015
REF NO. SM7715010-01-11
3. Original value of compressor frequency and freezer fan voltage
4. Inverter control
Item Explanation
Outline
To keep required cooling capacity, change the compressor frequency.
Compressor driving
frequency
under startup
Step1) Drive 25Hz for 1min
Step2) Drive 46Hz for 2min (When control to 50Hz or more)
When control to less than 50Hz, control to each target value after
Step1.
Compressor driving
frequency
before stopping
Step1) Decrease compressor frequency to 35Hz
Step2) Drive 35Hz for 3sec
Note: This function is controlled by Inverter-PCB
When TEST pin
is shorted
The compressor is operating continuously while TEST pin is shorted.
Ignore R sensor temperature. DEF can't startup.
Compressor frequency
：
50Hz
Under pulldown control
Starting up as normally startup driving.
Compressor frequency
：
50Hz
Step-up mode
When the compressor is driven 120min or more (In case of first time
compressor ON before defrosting, 180min or more), increase frequency
by every 30min.
Step-up mode shall be finished when the compressor OFF.
Step-up frequency
25Hz => 30Hz => 36Hz => 40Hz => 50Hz
After defrosting
Change the method of frequency control at first time compressor ON
after defrosting finish.
Step1) Drive 25Hz for 1min
Step2) Drive 46Hz for 2min
Step2) Drive 50Hz for 2min
Control to each target value after Step3.
Relationship between
Step-up mode and
defrosting
If Step-up mode is running at just before defrosting, store the frequency
value
and restore it when aftre defrosting control step3.
Priority
1.Start up 2.Pulldown 3.TEST pin 4.Step-up mode 5.Normal
High Ambient
Temperature Mode2
( AT>37
o
C )
High Ambient
Temperature Mode1
( 37
o
C>AT>=34
o
C )
Normal Mode
( 34
o
C>AT>=23
o
C )
Low Ambient
Temperature Mode
( AT<23
o
C )
Compressor Freq
：
40Hz
Freezer Fan Voltage
：
8V
Compressor Freq
：
40Hz
Freezer Fan Voltage
：
8V
Compressor Freq
：
40Hz
Freezer Fan Voltage
：
8V
Fridge Setting: Min
Fridge Setting: Mid
Fridge Setting: Max
Compressor Freq
：
50Hz
Freezer Fan Voltage
：
10V
Compressor Freq
：
36Hz
Freezer Fan Voltage
：
9V
Compressor Freq
：
25Hz
Freezer Fan Voltage
：
8V
Compressor Freq
：
50Hz
Freezer Fan Voltage
：
10V
Compressor Freq
：
40Hz
Freezer Fan Voltage
：
10V
Compressor Freq
：
30Hz
Freezer Fan Voltage
：
9V
Compressor Freq
：
36Hz
Freezer Fan Voltage
：
9V
Compressor Freq
：
50Hz
Freezer Fan Voltage
：
10V
Compressor Freq
：
50Hz
Freezer Fan Voltage
：
10V
