Ulvac LR Series - Troubleshooting; Major Troubles

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4.3 TROUBLESHOOTING
4.3.1 Major Troubles
Symptom Cause Corrective action
Power cannot be applied. Power is not supplied. Supply power.
Incorrect wiring of connector Correctly make wiring connection.
(Refer to 2.6.1 Power wiring)
Leak in pump Disassemble and repair pump.
No indication on display Breaker is not turned on. Turn on breaker.
Failure of instrumentation Replace instrumentation.
Controller can not activates the
Pump.
LOCAL mode is not selected. Press REMOTE/LOCAL switch on controller.
STOP SWITCH is turned on. Turn off STOP SWITCH.
EMERGEMCY STOP is displayed. Emergency stop pin of remote operation connector is not
shorted.
(Refer to 2.6.2 Wiring for remote control)
INTERLOCK is displayed. External interlock pin of remote operation connector is
not shorted.
Failure of instrumentation Replace instrumentation.
Pump does not start by remote
operation.
REMOTE mode is not selected. Press REMOTE/LOCAL selector switch on controller.
Failure of instrumentation Replace instrumentation.
Unusual sound is heard from
pump.
Panel is vibrating Contact with service center
Check by ULVAC personnel
Exhaust sound Sound may be high due to resonance in the piping when
gas is being fed. Use a pipe with a thicker wall to
suppress the sound.
Failure of the pump Contact with service center
Check by ULVAC personnel
Backing pressure rise Check the exhaust piping.
Leakage at inlet port Check the piping. Repair the trouble.
Pressure does not lower. Intake port wire netting is clogged. Check the piping at the upstream of the PUMP.
Pump operating temperature is not
static.
Measure again one hour later.
The ultimate pressure in the Specifications is the value
directly above the pump.
The temperature does not
increase. (only HR series)
Booster pump operating temperature
is not static.
Operating for one hour.
Turn on the bimetal switch because the bimetal switch
has been turned off when the temperature does not
increase after of the temperature error.
Exhaust pipe operating temperature
is not static.
Operating for one house.
Exchange the mantle heater because the temperature
fuse has been cut when the temperature does not
increase after of the temperature error.