Pacific Research Solutions TDS - Manual (Page 13)

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ERROR CODES:
Error codes are messages that are reported by the TDS monitor when it determines that something is not
working correctly. Sometimes an error message may flash on the display for a second or less. This maybe a
condition that was detected and corrected. An error message that remains on the display may indicate a problem
with the monitor, cable or probe. The following is a list of these error codes and their meanings.
---- Probe not connected. This message will occur whenever a conductivity probe is not connected to the
monitor. In the case of the percent rejection display, this message will appear when any one of the two
probes are missing.
Err This occurs with a flashing Low Supply LED to indicate that the RO is shutdown due to a low supply
cycle error. Reset by the manual alarm reset method or the automatic service reset method.
EC-2 Excitation voltage is out of range. This is an internal problem and if it persists, you will need to send the
monitor to the factory for service.
EC-3 Short in TDS probe or cable. This message indicates that a short has been detected in the extension cable
or conductivity probe. Check all connections for shorted wires or replace the conductivity probe.
EC-4 Offset voltage out of range. This is an internal problem and if it persists, you will need to send the
monitor to the factory for service.
EC-5 Short in temperature side of probe. This message indicates that a short has been detected in the extension
cable or temperature side of conductivity probe. Check all connections for shorted wires or replace the
conductivity probe.