Air PreciseAIR PCA Series, Инструкция по установке, эксплуатации и обслуживанию

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IOM-PreciseAIR
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4. M
AINTENANCE
4.1. Troubleshooting Charts
NOTE: All repairs to the unit should be done by qualified service personnel (i.e. for refrigeration,
a licensed refrigeration mechanic; for electrical, a licensed electrician). For mechanical repairs,
plant personnel can be used. Call Advance Industrial Refrigeration service technician for any
additional support or service assistance needed.
WARNING! EXTREME CAUTION MUST BE TAKEN BEFORE ENTERING THE CONTROL PANEL.
POWER TO THE UNIT MUST BE SHUT OFF BEFORE CHECKING ANY ELECTRICAL CONNECTIONS.
WARNING
Main power (3 phase) must be energized for 24 hours before starting unit and should be left on
overnight and weekends. This is necessary to keep the crankcase heaters energized and prevent
refrigerant from condensing and mixing with the oil in the compressor sump. Failure to comply with this
rule can severely damage the compressor. The unit is only safe to start if there is a visual indication of oil
level.
This section is primarily for use with all non‐screw compressor models where the standard control panel
and fault indication is used. All systems with the optional PLC or all screw compressor models have a plain
language PLC interface.
1 Symptom 1 Unit will not start
1.1 Power off Main switch open. Circuit breakers open. Assure all
breakers and switches are on.
1.2 Main power line open Check fuses.
1.3 Fuse is blown Check circuits and motor winding for shorts or
grounds.
Investigate for possible overloading. Replace fuse or
reset breakers after fault is corrected.
1.4 Defective contactor or coil Repair or replace.
1.5 Control circuit open Check control voltage fuses and transformer.
1.6 Motor electrical trouble Check motor for open circuit, short circuit, or motor
burnout.
1.7 Compressor is faulted Clear the faults in the controller and push the Reset
button if existent.
1.8 Loose wiring Check all wire junctions. Tighten all terminal screws.
2 Symptom 2 Compressor has excessive noise or vibration
2.1 Flooding of refrigerant into crankcase Check setting of expansion valve.
2.2 Improper or worn compressor supports Replace supports.
2.3 Worn compressor Replace or rebuild compressor.