Operating instructions

58
Operation
Operation:
Troubleshooting guide
Troubleshooting guide.
Problem
number
Problem Possible cause Action
10
11
12
Drain fault
Low water timer fault
LL probe fault
 When in autodrain
sequence, end-of-
season, or manual
drain,
VAPOR-LOGIC
®
3
allows 20 minutes
for the water level to
drop from the top
probe to below the
lowest probe. If the
tank does not drain
to this level in the
time allotted, a fault
will be indicated.
 Fill valve is stuck
open.
 Fill valve is installed
backwards.
 Water probes have
not proven.
 Improper water level
changes inside the
tank
 Check drain valve wiring.
 Check for voltage present at the valve.
If present, clean or replace valve.
 Check if the tank drain outlet is
plugged. Clean outlet if needed.
 Check valve for foreign matter.
 Check arrow direction on strainer. In
should be visible on fill valve body.
 Drain valve may be stuck open. Clean
or replace valve.
 Water is not conductive for probe
system. Add salt or convert to DI
control.
 Verify proper wiring of probe system.
 Clean or replace probe rod assembly.
 Rewire probes using nonshielded 18-
gauge wire routed in conduit separate
from power wiring.
 Check that wiring between control
cabinet and humidifier does not exceed
the recommended 50-foot limit.
 Check for plumbing problems.
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