Sharp SJ-XF50X-T Service Manual page 17

3-4. Specifi cations of Refrigerant Valve Operation
1) Modes and operating conditions of refrigerant valve (3-way valve)
1. Valve is fully closed:
• This mode is used in compressor OFF status.
2. Only fine capillary is opened:
• During normal cooling operation
3. Only wide capillary is opened:
• During cooling operation under large load
4. Both capillaries are opened
• The refrigerator is set in this mode for only one minute after the power supply is turned ON. This mode is used
for vacuuming. During cooling operation, this mode is not used.
• Differentiation between fi ne capillary and wide capillary
- Fine capillary: Capillary tube A
- Wide capillary: Capillary tube B
- The fi ne capillary is identifi ed with a yellow mark.
2) Fault and status of refrigerant valve
• There is no method to give an instruction from the PWB and confi rm the valve position.
Refrigerant valve status
Both capillaries are opened, and the valve does not operate.
1
No problem on cooling operation
Only the fi ne capillary is opened, and the valve does not operate.
2
Cooling performance deteriorates under large load.
Only the wide capillary is opened, and the valve does not operate.
3
No problem on cooling operation
Both capillaries are closed, and the valve does not operate.
4
Cooling operation is disabled.
• Fault of the refrigerant valve cannot be displayed in the self-diagnosis mode.
No problem
Refrigerant shortage may occur, causing frost around
the evaporator inlet to increase.
No problem
Cooling operation is disabled even when the
compressor is ON.
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SJXF50XT
Problem