Edwards EXT200/200H GCMS, Инструкция по эксплуатации, Страница: 31 / 38

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Maintenance
B756-01-880 Issue K
Table 7 - Fault finding
Symptom Check Action
The impeller does not rotate. After
pressing start - Fail LED not lit. Is the EXC Controller power LED lit? If not, check that the electrical
supply is on; check that the switch at
the rear of the EXC Controller is on;
check the fuse in the rear of the EXC
Controller.
If all of the above are OK, then the
EXC Controller is faulty. Consult
Edwards or the supplier.
Is the EXC Controller Start/Stop LED
flashing? If so, check that the correct links are
made on the EXC Controller logic
interface (refer to the instruction
manual supplied with the EXC
Controller).
Check that any system interlocks are
correctly made (refer to the
instruction manual supplied with the
EXC Controller).
Check that the pump-to-controller
lead is connected.
If all of the above checks have been
completed and the cause of the fault
has not been identified, consult
Edwards or the supplier.
Is the EXC Controller first speed
indication LED lit? If not, the EXC Controller is faulty. If
lit, then the EXT Split Flow Pump is
faulty. Consult Edwards or the
supplier.
The EXC Controller trips into Fail - at
any speed. Are the system interlocks correctly
connected? Ensure that the system interlocks do
not open after the EXT Split Flow
Pump has started.
The EXC Controller trips into Fail
during the ramp-up and before 50%
speed is reached. Is the inlet pressure too high? Is the
backing pressure too high? If so, reduce the pumping load, or
check for a gross leak into the
system.
Is the EXT Split Flow Pump running
too hot? Increase the cooling-water flow or
decrease the water temperature or
do both. Air cooling may need to be
added to water cooling. (Refer to
Section 3 for maximum inlet
pressure and cooling requirements).
Check that external heat sources
(such as system bakeout heaters) are
not excessive.
Does the rotor rotate freely? If not, the EXT Split Flow Pump
bearings are damaged. Consult
Edwards or the supplier.
Is the timer set incorrectly? Increase the timer setting (refer to
the instruction manual supplied with
the EXC Controller). If the EXC
Controller still trips into Fail, consult
Edwards or the supplier.