-------Internal training document for Haier service provider. External disclosure is prohibited --- Classification
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10.4 Battery Control Requirement:
There is a storage battery power switch on this equipment and this switch shall be turned on before the
freezer is switched on. As long as the switch is on, the AC equipment which meets the relevant
requirement will work normally. When AC power is supplied, the equipment will charge the storage
battery according to the relevant requirement, the battery shall be checked for 5min. after it is charged
for 24h, and the rated voltage of the storage battery shall be 12V If the AC power has a failure, the
storage battery will supply power to the display panel for normal supply. When the storage battery
charges to the voltage ≤10.5V, the battery will stop power supply and the display panel will not display.
Power can be switched off thoroughly and the display panel will not display as long as you disconnect
the AC power line and then switch off the equipment when the battery can supply power normally.
10.5. Temperature Deviation Adjustment Method:
Under the unlocking mode, if you press the function selection key, the display panel will display a value
for adjustment b5 to -5
℃
. After that, the computer board will save the value automatically.
Example 1: -80
℃
is displayed on the machine of a user, but the user measures that the temperature in
the freezer is just -70
℃
, so the difference is 10
℃
. In order to lessen the difference, the temperature
deviation can be adjusted by +5
℃
. Thus, the -75
℃
is displayed but the temperature in the refrigerator is
still -70
℃
. When the machine is switched on and refrigerates, the displayed temperature and the
temperature measured by the user will both drop at the same time;
Example 2: -80
℃
is displayed on the machine of a user. The machine cannot reach lower temperature
because the ambient temperature of the user is too high. However, it is required that -82
℃
shall be
displayed. Then, the temperature deviation can be adjusted by -2
℃
. Thus, the temperature display is
-82
℃
.
10.6 Condenser Fan Control:
When the compressors is on, two fans are on; when two compressors are off, two fans are on or off
according to the following circumstances: if the ambient temperature is not lower than 20
℃
, the two fans
will be on; if lower than 20
℃
, one fan will be on and the other one will be off; when the ambient
temperature is lower than 12
℃
, two fans will be off.
10.7 Remote Alarm Function
According to the remote alarm function requirement, the freezer will have the constant ON alarm or
Constant OFF alarm functions which can be selected according to the demand. In case of high
temperature, low temperature or external power failure (no matter if the standby battery switch is on or
off), the remote alarm function can be enabled.
10.8 Compressor Control
When power is just switched on, the time will delay according to the setting of the user (the default delay
is 1min.). If the freezer meets the switch-on condition, the high temperature compressor will be started.
After that, if the heat exchanger sensor temperature is not higher than -20
℃
in 10 minutes, the low
temperature compressor will start.
When compressors are switched on and off normally, if the freezer meets the switch-on condition, the
high temperature compressor will start. One minute later, if the heat exchanger sensor temperature is
not higher than -20
℃
in 1 minutes, the low temperature compressor will start.
Normally, it takes no less than 10min. for compressors to switch on and no less than 5min. for them to
switch off.
If the freezer meets the switch-off condition, there will be no output from the output terminal of the low
temperature compressor and the output terminal of the high temperature compressor.
If -40
℃
is selected during the operation of 3.2.1, other steps are the same with the operation for -86
℃
except that the judgment condition for the start of the low temperature compressor is changed to 5
℃
(30
℃
for switching off).
When the freezer is supplied with strong current for the first time, after the low temperature compressor
(continuously) works for 16h, it shall be turned off for 10min. forcefully and then run again automatically.
Summary of Contents for DW-86L338
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