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Problem Possible Cause Corrective Action
No electrical power… Verify that the purifier is connected to a live power source.
Ballast Disconnect the purifier from utility power. Replace lamp.
Lamp-out Protection The purifier must remain disconnected from power for
(MP16A, MP22A & MP36C) two (2) minutes to reset.
Cracked or broken Shut down purifier, drain, and replace quartz sleeve.
quartz sleeve… See “Quartz Sleeve Cleaning or Replacement” in the
“Maintenance” section.
Waterleaking into/from Quartz sleeve sealing Shut down purifier, drain, and remove static gland nut,
purifier. o-ring (s) worn, damaged… replace sealing o-ring. See “Quartz Sleeve Cleaning or
Replacement” in the “Maintenance” section.
Poor, or loose, connections Tighten suspect connection or fitting; or shut down
or fittings… purifier, drain, and remove fitting or connection.
Clean threads; reapply thread sealing tape and reinstall.
Quartz sleeve fouled… Clean quartz sleeve, see “Quartz Sleeve Cleaning
or Replacement” in the “Maintenance” section.
Sensor Probe, if equipped, Clean lens or Quartz Rod, see “Optional Ultraviolet
lens fouled… Monitor SensorProbe Cleaning” in the “Maintenance”
section.
Poor purifier performance Germicidal lamp output Replace lamp, as it nears its end of life (EOL). See
AND/OR Low UV intensity depreciating… “Lamp Replacement” in the “Maintenance” section.
(As indicated on Optional Germicidal lamp not Replace lamp. See “Lamp Replacement” in the
Guardian™functioning… “Maintenance” section.
Ultraviolet Monitor). Low input voltage… Verify input voltage to purifier.
Change in water quality… Have water tested to confirm that it does not exceed
maximum recommended concentration levels for use
with this purifier.
TROUBLESHOOTING
CAUTION: Always disconnect power to the water purifier, before performing any service.

IMPORTANT:This unit is to be serviced ONLY by qualified, and appropriately licensed, personnel.

Table 3 - Troubleshooting

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Purifier not operating.