Xylem YSI 2500 - Troubleshooting Guide and Chart

10-4
Troubleshooting Chart 10.2
SYMPTOM: MEASUREMENT ERROR: IB Level Error
POSSIBLE CAUSE: Pinched, leaking or disconnected tube.
ACTION: Fix or replace tubing.
SECTION: 8.4.6 Pump Tubing Replacement
POSSIBLE CAUSE: Sipper misaligned.
ACTION: Check Sipper alignment.
SECTION: 4.4 Align Sipper
POSSIBLE CAUSE: Sipper pump not operating properly.
ACTION: Replace sipper pump seals.
SECTION: 8.4.4 Sipper pump Seal Replacement
POSSIBLE CAUSE: Stir bar not in sample module.
ACTION: Install stir bar.
SECTION: 8.4.1 Sample Module Cleaning
POSSIBLE CAUSE: Stir speed too fast or too slow.
ACTION: Adjust stir speed.
SECTION: 6.2.2.4 Controls, Stirbar
POSSIBLE CAUSE: Newly installed enzyme Membrane.
ACTION: Enter probe diagnostics and check probe currents.
SECTION: 6.2.2 Module
POSSIBLE CAUSE: Newly installed probe.
ACTION: Enter probe diagnostics and check probe currents.
SECTION: 6.2.2 Module
POSSIBLE CAUSE: Power disruption.
ACTION: Enter probe diagnostics and check probe currents.
SECTION: 6.2.2 Module
POSSIBLE CAUSE: Failing enzyme membrane.
ACTION: Perform daily operational checks and replace membrane
if necessary.
SECTION: 5.1 Perform Daily Operational Checks, 4.7 Install Enzyme Membranes
POSSIBLE CAUSE: Enzyme Probe surface fouled.
ACTION: Clean probe surface.
SECTION: 8.4.3 Enzyme Probe Cleaning
POSSIBLE CAUSE: Auxiliary electrode fouled.
ACTION: Clean Auxiliary electrode surface (temperature probe) with isopropyl alcohol.
POSSIBLE CAUSE: Sample may contain an interfering substance.
ACTION: Attempt to confirm interference.
SYMPTOM: MEASUREMENT ERROR: PL Limit Error
POSSIBLE CAUSE: Sipper misaligned.
ACTION: Check Sipper alignment.
SECTION: 4.4 Align Sipper
POSSIBLE CAUSE: Stir bar not in sample module.
ACTION: Disassemble sample module and reinstall stir bar.
SECTION: 8.4.1 Sample Module Cleaning