Instruction manual

Type II Water System 5-11Thermo Scientific
Section 5
Maintenance and Servicing
System Alarms and
Errors (continued)
Message Possible Causes Action
RO Temp Error RTD not connected to board. Check RTD connection.
RTD out of tolerance. Replace RTD (RSX432).
Feed water temperature outside
of allowable range.
Check feed water temperature.
Control board out of tolerance. Replace control board (PC1403X3).
Check cell tolerance
Ensure that reading on tag agrees
with reading in software.
High RO Feed Purity
Improper feed water (unit being
fed pretreated water).
Analyze feed water - check that
system is being used for correct
application.
RO feed cell not connected to
control board.
Check connection of feed cell.
Feed cell fouled or out of toler-
ance.
Replace RO feed cell (E1403X7).
Check cell tolerance
Ensure that reading on tag agrees
with reading in software.
High RO Prod Purity
RO product cell not connected to
control board.
Check connection of product cell.
Product cell fouled or out of tol-
erance.
Replace RO product cell (E1403X7).
Check cell tolerance
Ensure that reading on tag agrees
with reading in software.
Low RO Purity RO membranes are fouled.
Replace RO membrane(s)
(FL1265X1).
RO cell connections to control
board are unplugged.
Check connections.
RO cells are fouled or out of tol-
erance.
Replace RO cells (E1403X7).
Check cell tolerance
Ensure that reading on tag agrees
with reading in software.