Screen Control System - Haier DW-25L92 Service Manual

1 External view of computer board
2 Basic parameters for computer board

Rated power 3W

Control current for press under normal operation shall be no more than 10A

The 30 seconds start delay for the first energization of press . In normal operation, each time it is
shut down, start timing, the compressor will not start if the start up time is less than 5 minutes; if the time is
over 5 minutes, please take the actual time for operation.
3 Temperature display function

The actual temperature displayed is integer. The measured value is rounded off to integer. in
normal situation, the temperature shall not hop, with all temperature variable being ± 1℃/min;
 The display range is from +34℃ to -45℃, with temperature higher than +34℃, displaying "HH";
with temperature lower than -45℃, displaying "LL".
4 Quick-freeze setup function

Press quick-freeze button to light indicating light SF, indicating that the refrigerator is in operation;
press the button again to release the status, or it may be released automatically after three hours.
Temperature can not be set under quick-freezing status;
5 Overheat alarming function

When the actual temperature sensed by the sensor is higher +5℃ higher or lower than set
temperature, the overheat alarming light will flicker (with interval of 1S), accompanies by buzzing (with
interval of 0.5S). Press the buzzing releasing button to release buzzing; but the red light will keep on
flickering (press again can not recover buzzing. It is only when the temperature is within +5℃ upper or
lower than set temperature or cut the power, the buzzing releasing button can reset to recover buzzing
function).

Note: if the freezing sensor is in error, the red light may keep on flickering with interval of 1S and
alarming fail.
6 Recovery processing and error display of freezing sensor

When the freezing sensor is in error (short circuit or open circuit), the temperature value displayed
will be "F1"; the frozen food cabinet enters protecting mode and compressor is in fixed alternation of
20min on and 5min off with alarming in failure; if the refrigerator is in quick-freeze status, quit (the
corresponding light will be off).
7 Break down memory function

When the frozen food cabinet is broken down and electrified again, the memory function can
operate according to status set before breaking down.

Display control>quick freeze>normal control

【Screen Control System】

F1 display >temperature display
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