Sharp SJ-FS810V-WH, Руководство по обслуживанию, Страница: 14 / 48

SJFS810VWH
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3. RE-SETTING OF MICROCOMPUTER AT POWER FAILURE
• At the power failure for over about 1 second, the control of the microcomputer will be reset.
• Microcomputer might continue to operate for approximately 10 seconds maximum at power failure depending on
the load at the operation. Approximately 30 seconds is necessary for the definite power OFF condition.
• When the power is re-supplied, the normal cooling will be resumed.
• The temperature and operation mode set by user will be maintained even if a power failure occurred. (However
express freezing, and ice tray cleaning will not be maintained.)
• When the mode for display is released after to be made, each mode and setting are resumed to the initial condition.
4. DIAGNOSIS METHOD OF FAILURE AROUND PWB
First of all, check by using the self-diagnosis.
In case that the power supply doesn't enter, check by the following procedure.
1. Disconnect power supply and check the following point.
• Is there any failure portion in inserting connectors?
2. Detach the PWB and check the appearance.
• Is there any burning or abnormal damage?
3. Check the conditions of the fuse and the varistor. (Fuse and varistor are located at the position in the figure.)
• Under the condition of power supply plug connected;
In case of no cooling and no indoor lamp lighting, there might be a possibility of fuse (F1 or F2) melt down.
When the fuse F1 or F2 is melt down, PWB does not operate at all.
When the fuse F3 is melt down, defrosting heater and refrigerator door heater are not electrified. (Defrosting error
will be diagnosed as “Defrosting failure” by the self diagnosis.) In this case, the cooling performance may
deteriorate or dew generation may occur on the door, because the defrosting is not done.
• Melting in the fuse cannot be checked visually (as the safer one than transparent glass tube is used). Be sure to
detach the connector “CN1” before measuring the resistance between the both ends of the fuse by the tester.
• Next, measure the resistance value between the both leads of the varistor.
Fuse1
Fuse2
Fuse3
Varistor3
Varistor1