Error Conditions - Thermo Scientific EASYpure II RF Operating Manual And Parts List

Error Conditions

Thermo Scientific
Problem
Display reads "Er1". (Purity
data error)
Display reads "Er4". (Cell
temperature sensor error)
Display reads "Er5". (Meter
board communication error)
Possible Causes
Air in system.
Resistivity cell not connected
to circuit board.
Resistivity cell dirty.
Resistivity cell out of toler-
ance.
Meter board out of tolerance. Call Technical Service.
Resistivity cell not connected
to circuit board.
Resistivity cell dirty.
Meter board out of tolerance. Call Technical Service.
Meter board needs to be
reset.
Meter board not connected to
display/control board.
Section 10
Troubleshooting
Action
Purge air from system by
drawing off water according to
the instructions in the
Operation section.
Check resistivity cell lead con-
nections. (P1 on meter board,
PCX70)
Clean cell and reinstall.
Replace resistivity cell.
Call Technical Service.
Replace resistivity cell.
Turn unit "Off" and back "On".
Call Technical Service.
EASYpure II RF 10-3