LF-318
Freezer controller
1030062 REV:2 C,S:758CH 070307
Panel
SET
LF- 3 1 8
LAW- C H AI N
O N
O F F
Defog
Defrost
L i gh t
De
fD
ura
tio
n
Ru
nin
g
Cy
c
Te
mp
Dif
f
Te
mp
sett
ing
Specifications
Supply voltage
12V/AC/50~60Hz
Operating Temperature
-15
°
C ~ +70
°
C
Temperature range
-50
°
C ~ +80.0
°
C
Display
Seven segment LED
Resolution
0.1
Accuracy
1
Dimension
137*28*32mm
3
(Panel)
Dimension
171*141*39mm
3
(Box)
Mounting
Embedded
Maximum output rating (Resistive load)
Compressor 30 A/250V
Defroster 16A/250V
Defogger 8A/250V
Light 8A/250V
Fan 8A/250V
General parameters
No.
Parameter
Description
Range
Default
1.
Temperature Setting
The temperature to stop compressor
-50
°
C ~ +80.0
°
C
-20
°
C
2.
Temperature Differential
The temperature differential to restart compressor
+0.1
°
C ~ +15.0
°
C
+4.0
°
C
3.
Running Cycle
Defrosting when system running hours is over this
setting
0 ~ 24 hours
4 hours
4.
Defrost duration
Setting the duration of defrosting
0 ~ 60 min.
20 min.
5.
Defroster stopping temperature
The temperature to stop defroster
°
°
+25.0
°
C
6.
Fan running temperature
Fan running when temperature is higher than this
setting
°
°
0.0
°
C
7.
Compressor start-up delay
Compressor start-up delay time
0 ~ 15 min.
2 min.
8.
Sensor calibration
Sensor calibration adjustment
-10
°
C ~ +10.0
°
C
0.0
°
C
Protective parameters
No. Symbol
Description
Range
Default
1.
LO
Parameter protection
y
n
y
2.
tH
The upper temperature limit
tS ~ +80.0
°
C
+50.0
°
C
3.
tL
The lower temperature limit
-50
°
C ~ tS
-50
°
C
4.
AH
High temperature alarm
tS ~ +80.0
°
C
+50.0
°
C
5.
Ht
Alarm when the temperature is higher than AH setting
continuously over this duration
0~180 min.
90 min.
6.
AL
Low temperature alarm
-50
°
C ~ tS
-30
°
C
7.
Lt
Alarm when the temperature is lower than AL setting
continuously over this duration
0~180 min.
60 min
8.
FL
Fan stops when compressor stops
y / n
y
9.
CL
Condenser fin cleaning interval
0~250 days
0
10.
rt
Display refresh latency for fraction part of temperature
0~15 seconds
0
Setting general parameters
Press and hold
SET
key for 5 seconds until “Temperature
Setting” LED is on. Three options can be chosen at the moment
which are
CC
(to unlock the control panel)
OO
(to lock the
control panel) and
55
(to restore all parameters to the default
value). Use
or
keys to select one of the options and
press
SET
key. When
CC
is selected, no parameters can be
modified further except parameter “Temperature Setting”. If
you want to modify other parameters, please select
OO
.
To modify general parameters, Press
SET
key. The display will
show symbol “888” for about 2 seconds and then “Temperature
Setting” LED will be on. The first parameter “Temperature
Setting” is ready to be modified. To change the parameter value,
use
or
keys. To select next parameter, use
SET
key (each parameter and it’s related LED is listed on the right. ).
Parameters and LEDs
Parameters
Temp
setting
LED
(Yellow)
Temp Diff
LED
(Yellow)
Running
Cyc
LED
(Green)
Def
Duration
LED
(Red)
Temperature Setting
On
Temperature Differential
On
Running Cycle
On
Defrost Duration
On
Defroster stopping
temperature
Flash
Fan running temperature
Flash
Compressor start-up delay
Flash
Sensor calibration
Flash
When the last parameter (Defrost Duration) is selected, press
SET
key again can leave parameter setting procedure and save all settings. If
no any key is pressed within 30 seconds during parameter setting procedure, system will leave the parameter setting procedure and save all
settings automatically.
