9–7
62-11640
Indication/Trouble
Possible Causes
Action / Reference
9.4.8
Abnormal Pressure - Cooling
High discharge pressure
Condenser coil dirty
Condenser fans rotating backwards
Check Wiring
Refrigerant overcharge or noncondensibles
Discharge service valve partially closed
Open
Stuck Open Economizer Valve
Stuck Open LIV
Defective High Pressure Switch
Low discharge pressure
Low refrigerant charge
Suction modulation valve malfunction
Damaged Compressor
Compressor rotation backwards
Check Contactor
Wiring
Discharge transducer circuit faulty pressure reading
Low suction pressure
Filter-drier partially plugged
Low refrigerant charge
Expansion valve malfunction
No evaporator air flow or restricted air flow
Excessive frost on evaporator coil
Suction modulation valve malfunction
Liquid or suction line service valve partially closed
Open
High suction pressure
Transducer defective
EVXV stuck open
Compressor defective
Suction and discharge pressures
tend to equalize when unit is oper-
ating
Compressor rotation backwards
Check Contactor
Wiring
Damaged Compressor
9.4.9
Abnormal Noise
Compressor
Loose mounting bolts
Tighten
Worn bearings
Liquid slugging
Condenser or evaporator fan
Condenser fan
Evaporator fan
9.4.10
No Evaporator Air Or Flow Or Restricted Air Flow
Evaporator coil blocked
Frost on coil
Dirty coil
No or partial evaporator air flow
Evaporator fan rotating backwards
Evaporator fan defective
Evaporator air flow blocked
Check
Summary of Contents for Vector 8500
Page 23: ...62 11640 1 6 1 3 SAFETY DECALS ...
Page 24: ...1 7 62 11640 62 03958 ...
Page 25: ...62 11640 1 8 ...
Page 26: ...1 9 62 11640 ...
Page 27: ...62 11640 1 10 ...
Page 125: ...62 11640 SECTION 6 MESSAGECENTER PARAGRAPH NUMBER Page 6 1 MESSAGECENTER MESSAGES 6 1 ...
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