44
T
ROUBLESHOOTING
Error Conditions
Problem
Possible Causes
Action
Display reads “Er1”
Air in system.
Purge air from system by
(Purity measurement error)
drawing off water according to
the instructions in the Operation
section.
Resistivity cell not connected to
Check resistivity cell lead
PCX70 meter board connection (P1).
connections (P1) on circuit board.
(See Wiring Diagram)
Resistivity cell dirty.
Clean cell and reinstall.
Resistivity cell out of tolerance.
Replace resistivity cell.
Display reads “Er3”.
UV lamp cable not plugged into J6 of
Plug UV lamp cable into J6 of
(UV lamp error)
PC1302X1.
PC1302X1 daughter board.
(See Wiring Diagram)
UV lamp burnt out or nearing the end
Replace UV lamp (LMX13).
of its useful life.
Chamber seal is compromised and
Replace quartz sleeve and o-rings.
UV lamp is getting wet.
Call Technical Service.
UV lamp not properly connected to
Recheck/reconnect.
UV cable connector.
UV ballast out of tolerance.
Replace ballast. Call Technical
Service.
Display reads “Er4”
Resistivity cell not connected to
Check resistivity cell lead
(Cell temperature sensor error)
meter board (PCX70).
connection (P1) on meter board.
(PCX70) (See Wiring Diagram)
Resistivity cell dirty.
Clean cell and reinstall.
Resistivity cell temperature
Replace resistivity cell (E703X1A).
sensor out of tolerance.
Meter board out of tolerance.
Replace meter board (PCX70).
Call Technical Service.
Display reads “Er5”.
PC board communication trouble.
Cycle power.
(Meter board data error)
Meter board not connected
Check connection from meter
to display/control board.
board (PCX70 10 pin connector)
to display/control board (J2).
Meter board (PCX70) out of
Replace meter board (PCX70).
tolerance.
Call Technical Service.