Cryomech LNP-40, Инструкция по установке, эксплуатации и текущему обслуживанию

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Operation
7-17
7.10.7 Electrical protection device tripped
SYMPTOM Helium compressor will not start.
POSSIBLE
CAUSE
1) Electrical protection module is in a fault condition.
2) Electrical protection module is in a time delay mode.
REMEDY
1) Open the enclosure door and visually inspect the electrical
protection module. If there are faults displayed, the EPD will not
allow the system to start.
•
Check the line voltage if the Over Voltage or Under Voltage
indicators are lit. The required voltage for the LNP is printed on
the identification label attached to the front panel of the helium
compressor.
•
If the Phase Loss or Unbalance indicator is lit, measure the
voltage at each phase to ensure they are balanced.
2) If the EPD senses a fault when the LNP is operating, the system
will be automatically shut down and the 5-minute restart time
delay will begin.
•
Both the Output On and Reading Memory indicators will “Slow
Flash”. The system cannot be restarted during the 5-minute
delay.
•
Should the fault be corrected at the end of the restart delay, the
EPD will automatically restart the LNP after a 3-15 second
random start delay. The Output On indicator will “Fast Flash”
during the random start delay.
•
Once the system starts, the Output On indicator will be “Steady
On”. The fault will be stored in the EPD’s memory and the
Reading Memory indicator will “Slow Flash”.