Specifications
37
TROUBLESHOOTING
Problem Possible Causes Action
Display reads “Er1” Resistivity cell not connected to Check resistivity cell lead
(Purity measurement error) PCX70 meter board connection (P1). connections (P1) on circuit board.
(See exploded views on Fig. 14)
Air in system. Purge air from system by
drawing off water according to
the instructions in the Operation
section.
Resistivity cell dirty. Clean cell and reinstall.
Resistivity cell out of tolerance. Replace resistivity cell.
Display reads “Er2”. Water supply not available. Check water supply connection
(Water supply error) and/or level in storage tank.
Momentary loss of internal feedwater Press START/STOP and operate
pressure. normally.
Pressure switch not connected Check pressure switch connection
properly. (J4) at daughter board PC1302X1.
(See Fig. 14)
Internal pressure switch out of Replace pressure switch. Call
tolerance. Technical Service.
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 Fig. 14)
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 Fig. 14.
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.
Error Conditions