EWELLY EW-285L Operation Manual

Microcomputer Thermostat Serial
EW-285L Dual Compressor Operation Manual
Welcome to choose our instruments. This micro-
computer temperature
designed for refrigerator and freezer, easy-to-use,
accurate control, and strong anti-interference. Our
sensor is precisely made and sealed. It is moisture
proof, therefore its performances are more stable and
reliable.
Technical Specifications：
1 . Operating voltage : AC220V
2 . Output Load : 5A/220V/AC
： ≤3W
3 . Power Consumption
: －10℃ ～50℃ R H≤90%
4 . Working environment
： —100℃ ～100℃
5 . Control Range
: ＞-20℃ to 0.1℃; Accuracy: ±0.5℃
6 . Resolving
≤-20℃ t o 0 . 1℃; Accuracy:±1℃
8. Input: 2-OFF Pt100 sensors
：
9. Overall Dimension 160mm(length) 45mm(width)
81mm(high)
10. Mounting Size: 138mm(length) 32mm(width)

Panel Appearance

Temperature
！
EW-285L

Demand of installation

1. It is necessary to ensure the power supply voltage meets
the requirements of the controller, the deviation betwe-
en power supply and rated voltage is no greater than
±5%.
2. The sensor line must be kept away from the power line.
3. Strictly distinguish the interface of power line, power
line, and relay output.
controller is specialized
±10％ 50HZ/60HZ
×
×
Set Temp.
SET
PV
SV

Operation Instructions

1. Temp. control setting: Press
or to change set temp.
2. Parameters setting: Hold
displays , then press
codes will be displayed in sequence:
3. Press for 10s, the display will flash, and all parameters are
restored to factory default values. (After flashing, please reconnect
the power to let the system return to the normal operation mode)
4. Switch on/off
Press for 3s under operation mode, and the display is off, and all
outputs will be cut out. Under the shutdown mode, press
3s, indicator turns on, and thermostat returns to normal operation.
5. Display the air-returning sensor Temperature
Press under un-setting mode, the displayed temp. shows the air-
retruning temp. , and set temp. will not be displayed.
6. Display defrost time
Press under un-setting mode for 5s, it displays the defrost mode
or defrost termination remaining time.
temperature temperature set temp set temp
temperature temperature set temp set temp
c c c c
现 时 温 度 现时温度 现 时 温 度 现时温度 设定温度 设定温度 设 定 温 度 设 定 温 度
EW-285L
×
temperature
temperature set temp set temp
现 时 温 度 设 定 温 度
现时温度 设定温度
EW-285L
set temp
temperature
temperature set temp
c c
现 时 温 度 设 定 温 度
现时温度 设定温度
EW-285L
set temp
temperature temperature
set temp
c c
现 时 温 度 设 定 温 度
现时温度 设定温度
EW-285L
temperature
temperature set temp
现时温度 现 时 温 度 设定温度 设 定 温 度
EW-285L
temperature
temperature
set temp
c c
现 时 温 度 现时温度 设 定 温 度 设定温度
EW-285L
temperature set temp
temperature set temp
现时温度 设定温度
现 时 温 度 设 定 温 度
temperature set temp
temperature set temp
现时温度 设 定 温 度 设定温度 现 时 温 度
EW-285L
temperature set temp
temperature
set temp
现 时 温 度
现时温度 设定温度 设 定 温 度
EW-285L

Failure mode management:

If the cold room sensor is open or short circuit, it displays "E1", then the
system enter failure operation mode, which No.1 compressor runs 45mins then
stop for 15mins until the system goes back to normal. No.2 compressor stops
working during this period.
Air-returning sensor is open or short circuit, it displays "E2" and it doesn't
affect system operation.
Version：285L.19.03.25
to display the set temp., to press
key for 6s to enter the manual, it
continuously, the following parameter
Press key once, then use
SET SET SET SET
to select temperature return difference
1℃～10℃。
Press key twice, then use
SET SET
to select NO.1 compressor start delay
time 0~10min.
Press key 3 times, then use
SET SET
to select cold room Temp. calibration
-15℃~15℃.
Press key 4 times, then use
SET SET
to change air-returning pipe Temp. cali-
bration -15℃~15℃.
Press key 5 times, then use
SET SET
to select NO.2 compressor start delay
time 0~30min (after NO.1 compressor
starts).
Press Press key 6 times, then use key 6 times, then use
SET SET
to select NO.2 compressor start Temp. to select NO.2 compressor start Temp.
-135℃~50℃. -135℃~50℃.
Press key 7 times, then use
SET SET
to select defrost time 1~60min.
Press key 8 times, then use
SET SET
to select defrost cycle 0~99hr.
Press key 9 times, then use
SET SET
to select dripping time 0~30min.
key for
or
or
or
or
or
or or
or
or
or