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Maintenance
A708-01-880 Issue E
Tabl e 1 6 - Fau lt fin di ng
Symptom Check Action
The pump suddenly stops. Has the cooling water supply been
interrupted, or has it failed?
Check that there is a sufficient flow
of cooling water through the pump:
check that the cooling water supply
is on, is at the correct pressure and is
of the correct temperature (see
Section 2.7).
Is the TCV incorrectly set? Check that the TCV is correctly set
for the required pump operating
temperature. If necessary, adjust the
TCV: see Section 3.17.2.
Is the coolant level too low? Check the level of coolant in the
pump, and add more coolant if
necessary: refer to Section 5.5.
Is the heat exchanger blocked? If the cooling water supply is on and
is at the correct pressure and
temperature, the heat exchanger
may be blocked: clean the heat
exchanger (refer to Section 5.10).
Has the pump seized because the
shut-down system is faulty?
Check that the trip temperature
setpoint is correctly set, and that the
shut-down system operates correctly.
Has the pump seized due to
inadequate cooling of the rotors?
If the cooling water supply is on and
is at the correct pressure and
temperature:
z Check the oil levels and add
more oil as necessary: refer to
Section 5.3.
z The oil filters may be blocked:
replace the oil filters as
described in Section 5.8.
z IDX1300 only - the air bleed
filter may be blocked.
Is there a hydraulic lock in the pump? Try to free the hydraulic lock (refer
to Section 5.13). If the pump cannot
be freed, contact the supplier or
Edwards.
Has the pump seized due to deposits
in the pump?
Flush the pump with cleaning
solution (refer to Section 5.9). If the
pump cannot be cleaned of deposits,
contact the supplier or Edwards.
The pump operates at too high a
temperature or the pump
temperature is unstable.
Is the cooling water flow inadequate,
or is the flow being interrupted?
Before restarting the pump, check
for correct cooling water flow.
Is the cooling water filter blocked? Clean the cooling water filter (refer
to Section 5.10.2).
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