72-910-16 Rev. N
Page 34 of 43
10. TROUBLESHOOTING GUIDE
Symptom
Probable Cause
Possible Solution
Controller does not power
up.
No power supplied to controller.
Insure that correct voltage is supplied to controller.
Check circuit breaker supplying power to the
controller.
Fuse is blown.
check/replace fuses F1-F3 (
see Figure F6, Page 12
)
Ribbon cable.
Check ribbon cable connecting upper and lower pc
boards inside controller.
Controller displays “No
Flow” alarm message.
No flow thru flow assembly.
Insure there is enough water flow through the
assembly. At least 1 GPM (3.8 LPM) of flow.
Flow switch wiring or connector
loose.
Check flow switch connections (
see Figure F7, Page
13
).
Flow switch stuck.
Clean flow switch sensor mechanicals.
Flow assembly clogged.
Clean inside flow assembly.
Flow switch input jumper
missing.
Install jumper if flow switch is not used.
Controller displays "Cond
Low” alarm message.
Conductivity reading below
programmed low limit.
Adjust conductivity low limit setting (
See Page 25
).
Excessive amount of air in and
around conductivity probe.
Prime flow assembly.
Bleed valve stuck open.
Replace/clean bleed valve.
Controller displays "Cond
High” alarm message.
Conductivity reading above
programmed high limit.
Adjust conductivity high limit setting (
See Page 25
).
Excessive amount of solids
and/or debris in and around
conductivity probe.
Clean flow assembly.
Faulty bleed valve.
Replace bleed valve.
Clogged bleed valve or drain.
Clean valve or drain.
Controller displays "Inhib
Low" alarm message.
Inhibitor drum fluid level low.
Refill drum.
Drum level switch wiring or
connector loose.
Check switch connections (
See Figure F7, Page 13
).
Drum level switch stuck.
Clean switch sensor mechanicals.
Controller displays "Bio A
Low" alarm message.
Biocide A drum fluid level low.
Refill drum.
Drum level switch wiring or
connector loose.
Check switch connections (
See Figure F7, Page 13
).
Drum level switch stuck.
Clean switch sensor mechanicals.
Controller displays "Bio B
Low" alarm message.
Biocide B drum fluid level low.
Refill drum.
Drum level switch wiring or
connector loose.
Check switch connections (
See Figure F7, Page 13
).
