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7.2 Alarm Messages
Alarm messages will include the Name of the input or output as defined in the Settings menu, the hardware identifying
type and number (S for sensor input, D for digital input, R for relay output, A for analog output), and the type of alarm.
HIGH or HIGH-HIGH ALARM
Occurs if the conductivity rises above the high conductivity alarm set points. If your unit is programmed for an
alarm relay output, the alarm relay will activate. The controller will continue to check the conductivity, and any
outputs using the conductivity sensor will remain active.
Possible Cause
Corrective Action
Dirty sensor
Clean sensor (see Section 6.1)
Faulty bleed solenoid valve
Repair or replace solenoid valve
Faulty sensor
Replace sensor
Improper wiring of valve or controller
Correct wiring
Conductivity rose over alarm limit while biocide
lockout occurred
Allow normal bleed to occur
Clogged Y-strainer in bleed line
Clean Y-strainer
Infrequent intermittent sampling
Sample more often
Faulty bleed relay
Replace power relay board
LOW or LOW-LOW ALARM
Occurs if the conductivity drops below the low conductivity alarm set points. If your unit is programmed for an
alarm relay output, the alarm relay will activate. The controller will continue to check the conductivity, and any
outputs using the conductivity sensor will remain active.
Possible Cause
Corrective Action
Sensor disconnected
Reconnect. Check cable for continuity.
Sensor dry
Check tee for obstruction. Verify flow. Change location of elec
-
trode.
Pre-bleed set too low
Check pre-bleed setting
Solenoid valve stuck open
Repair or replace solenoid valve
Faulty electrode
Replace sensor
Improper wiring of electrode
Correct wiring
Faulty bleed relay
Replace relay
In boilers, flashing to steam
Make sure plumbing is done according to the recommended
installation diagram
Too frequent intermittent sampling
Sample less often
DI STATE CUSTOM MESSAGE
A digital input that is a DI State type can be set such that either the open or closed state generates an alarm.
The alarm message may be customized. The most common use for this will be a Flow Switch.
Possible Cause
Corrective Action
No flow
Check piping for closed valves, blockage, etc. Check recirculation
pump.
Faulty flow switch/cable
Check with ohmmeter.
Faulty controller
Check by shorting digital input in controller.
TOTAL ALARM
Occurs if the flowmeter totalizer alarm limit is exceeded.
Possible Cause
Corrective Action
Normal operation
Reset the total to clear alarm
AC coupled onto flowmeter cable
Route cable at least 6 inches (150 mm) away from any AC voltage
Noise coupled onto flowmeter cable
Shield cable
OUTPUT TIMEOUT
This error condition will stop control. It is caused by the output (either relay or analog) being activated for lon-
ger than the programmed Time Limit.
Possible Cause
Corrective Action
Programmed value too low for normal conditions Increase Time Limit.
Bleed flow rate too low
Check for clogged strainer. Check for insufficient pressure diffe
-
rential.
Bleed valve not opening
Check for faulty bleed valve. Check bleed valve wiring. Check
controller relay.
Sensor not responding
Clean sensor, check wiring, replace sensor
RANGE ALARM
It indicates that the conductivity signal from the sensor is out of the normal range of 0-30,000. This error
condition will stop conductivity control. This prevents controlling based upon a false conductivity reading. If
the temperature sensor goes into range alarm (outside -5 to 90 C for tower, -5 to 220 C for boiler), then the
controller will go into manual temperature compensation using the Default Temperature setting.
Possible Cause
Corrective Action
Sensor wires shorted
Disconnect short
Faulty sensor
Replace sensor
Faulty controller
Replace or repair controller
SENSOR FAULT
This error indicates that the signal from the sensor is no longer valid at all. This error condition will stop conductivity
control.
Possible Cause
Correction Action
Sensor wires shorted
Disconnect short
Faulty sensor
Replace sensor
Faulty controller
Replace or repair controller
INPUT FAILURE
This alarm indicates that the sensor input circuit is no longer working. This error condition will stop conductivity
control.
Possible Cause
Correction Action
Faulty controller
Replace or repair controller
BATTERY POWER LOW
This alarm indicates that the battery which holds the date and time in memory is below 2.4 VDC.
Possible Cause
Correction Action
Faulty battery
Replace battery
