Faults
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MXD70 pH / Redox
Setup and Operating Guide
Faults
Modbus Errors
E420 UNIT Modbus Setup Checksum
The Modbus setup has become corrupted. Check and correct the Modbus settings
and turn the unit off and on again. If the message persists please consult with your
supplier.
E421 UNIT Modbus Store A Checksum
The Store A Save for the Modbus Configuration has become corrupted. Check the
Modbus settings in the Modbus menu and then save the settings again into Store A
in the Save/Restore menu.
E422 UNIT Modbus Store B Checksum
The Store B Save for the Modbus Configuration has become corrupted. Check the
Modbus settings in the Modbus menu and then save the settings again into Store B
in the Save/Restore menu.
E423 UNIT Modbus SD Card Checksum
The SD Card store from which the Modbus configuration was restored from has
become corrupted. Check the Modbus settings in the Modbus menu and then save
the settings again to the SD card store.
SensorTalk Errors
E450 CH1 LED Off Temperature Exceeded
E480 CH2
The probe’s photoluminescence system is turned off as a result of the probe’s
temperature exceeding the defined threshold setting.
E510 CH3
E451 CH1 CIP Temperature Exceeded
E481 CH2
A Clean-In-Place cycle is occurring, the probe’s photoluminescence system is
turned off and an CIP event is recorded to the probe’s log. This is a result of the
probe’s temperature exceeding the defined threshold setting.
E511 CH3
E452 CH1 SIP Temperature Exceeded
E482 CH2
A Steam-In-Place cycle is occurring, the probe’s photoluminescence system is
turned off and an SIP event is recorded to the probe’s log. This is a result of the
probe’s temperature exceeding the defined threshold setting.
E512 CH3
E453 CH1 Smart Sensor Error
E483 CH2
An error has occurred with operation of the smart sensor. Try switching the unit off
and then on again. If the message persists, consult with your supplier, as the
channel’s input card or sensor may require to be returned for repair.
E513 CH3
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