Fujitsu FO2416RTJNAA - Page 45

45
9.0 DIAGNOSTICS & TROUBLESHOOTING
Diagnostics
9.9 Service Analyzer Charts (cont.)
FLOODING
SYMPTOM POSSIBLE CAUSE REMEDY
Poor system control
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Loose sensing bulb Secure the bulb and insulate.
%XOELQZURQJORFDWLRQ Relocate bulb.
:URQJVL]H7;9 Use correct replacement.
Improper superheat setting (less than 5°F [2.8°C]) 5HSODFH7;9
THERMOSTATIC EXPANSION VALVE (TXV)
SYMPTOM POSSIBLE CAUSE REMEDY
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Suction Pressure
(superheat over
15°F [8.3°C])
0RLVWXUHIUHH]LQJDQGEORFNLQJYDOYH 5HFRYHUFKDUJHLQVWDOOÀOWHUGULHUHYDFXDWHV\VWHP
recharge.
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recharge.
/RZUHIULJHUDQWFKDUJH Correct the charge.
9DSRUEXEEOHVLQOLTXLGOLQH Remove restriction in liquid line. Correct the refrigerant
charge.
Remove noncondensible gases.
Size liquid line correctly.
Misapplication of internally equalized valve 8VHFRUUHFW7;9
Plugged external equalizer line Remove external equalizer line restriction.
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9DOYHIHHGVWRRPXFK
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superheat and higher
than normal suction
pressure
0RLVWXUHFDXVLQJYDOYHWRVWLFNRSHQ 5HFRYHUUHIULJHUDQWUHSODFHÀOWHUGULHUHYDFXDWHV\VWHP
and recharge.
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open
5HFRYHUUHIULJHUDQWUHSODFHÀOWHUGULHUHYDFXDWHV\VWHP
and recharge.
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KHDUG$77+(7;9GXULQJWKHRIIF\FOHLIWKLVLV
the cause). NOT APPLICABLE TO BLEED PORT
9$/9(6
5HSODFHWKH7;9
2YHUVL]HG7;9 ,QVWDOOFRUUHFW7;9
Incorrect sensing bulb location ,QVWDOOEXOEZLWKWZRPRXQWLQJVWUDSVLQRU
SRVLWLRQRQVXFWLRQOLQHZLWKLQVXODWLRQ
/RZVXSHUKHDWDGMXVWPHQW 5HSODFH7;9
Incorrectly installed, or restricted external
equalizer line
Remove restriction, or relocate external equalizer.