Ulvac UMP-40W, Инструкция по эксплуатации

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ULVAC CRYOGENICS INCORPORATED 37
Troubleshooting
When any failure or unusual phenomenon occurs in the equipment, execute at first the fault
diagnosis shown in the following table. When making contact with or making an inquiry to us,
please check the PLC menu of the touchscreen or lighting status of PLC lamp arranged to the
electrical circuit in advance.
When the alarm lamp blinks, please refer to Section8 of the touchscreen instruction manual.
Problem Possible Cause Corrective Action
(1) The operation display lamp
fails to come on.
Power is not supplied Please supply the power
The power cord is not connected. Connect the power cord correctly.
The circuit breaker of UMP-40W
is turned OFF.
Turn ON the circuit breaker.
(2) Power breaker is tripped. Short-circuit or electric leakages
occur. Please contact us.
(3)Liquid Nitrogen cannot be
dispensed.
No liquid nitrogen such as at the
time of initial start-up. (LN
2
amount is displayed as 0 %)
Please wait until liquid nitrogen is
accumulated.
Level sensor malfunctions due to
ice or frost in the dewar.
Please contact us..
Electromagnetic valve breaks
down
(Electromagnetic valve does not
sound operating.)
Please contact us.
The equipment is in initial
start-up.
Wait for about 12 hours until the
dewar temperature is lowered
enough to store liquid nitrogen.
(4) Liquid Nitrogen does not
increase.
The helium gas piping and
refrigerator cables are not
connected correctly.
Connect the helium gas lines and
refrigerator cables correctly.
The level sensor fails to detect
correctly.
Please contact us.
Ensure that main power is disconnected before inspecting the power source or inside of the
equipment. Some parts of the equipment may remain in high temperature right after
stopping operation. Use caution to avoid burn injury.
WARNING