Table 3–1: Maintenance schedule (continued)
Procedure Frequency Additional information
Replace the ion block heater
cartridge.
If the heater fails to heat when
the instrument is pumped down
(evacuated).
This task must be performed
by a Waters field service
engineer. (See Waters
contact information).
Replace the rotary backing
pump's demister element.
(Performance QDa only.)
Annually.
Note: Applications that
contaminate the rotary backing
pump oil reduce this period
and must be determined from
experience.
See Replacing the rotary
backing pump’s demister
element.
Replace the internal source
exhaust valve. (Serial number
suffix KAD only.)
Annually, or when the source
pressure test fails and all other
causes of failure have been
investigated.
See Replacing the internal,
source exhaust valve (KAD).
Clean the diverter valve or
replace its components.
Clean the valve when
performance reduces to
unacceptable levels and
replace components if they
become irretrievably damaged.
See Diverter valve
maintenance procedures.
3.2 Spare parts
To ensure that your system operates as designed, use only Waters Quality Parts. Visit
www.waters.com/wqp for information about Waters Quality Parts, including how to order them.
3.3
Replacing fuses
Warning: To avoid electrical fire, ensure that replacement fuses comply with the
ratings affixed to the rear panel of the module.
Warning: To avoid electric shock, disconnect the mass spectrometer from the power
supply before replacing fuses. The mass spectrometer has two fuses and uses double
pole/neutral fusing circuitry. Circuits can remain live even when one fuse has blown.
If either of the instrument's fuses, located on the rear panel, rupture or become otherwise faulty,
replace it with a fuse of this type and rating.
June 15, 2017, 715003956 Rev. F
Page 26
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