69
Operation
Operation:
Troubleshooting guide
Troubleshooting guide.
Problem
number
Problem
Possible cause
Action
29
30
Fill valve cycles on
and off frequently
(several times per
minute).
Heater burnout
Malfunctioning level
control system
Drain valve not fully
closed
Water level is too low.
Improper wiring
Mineral buildup
impeding heat transfer
to water
Heater corrosion
If needed, clean probe tips.
Check water conductivity. (Minimum
conductivity for proper operation of
level control system is 100
microSiemens per cm.)
Verify that probe wiring is correct.
If an obstruction will not allow drain
valve to fully close, clean valve.
If there is a broken or weak return
spring on drain valve, replace the valve.
Check if 24 VAC is present at valve. If
so, check wiring of VAPOR-LOGIC
®
3
control board terminals 3 and 4.
Check probes and clean tips if
necessary.
Clean probe still-well area in tank.
Check drain valve and clean, repair, or
replace as needed.
Verify proper voltage applied to heater.
Verify proper electrical connections.
Inspect tank for severe mineral buildup
on or around heater. Increase skimming
quantity, frequency of drain cycle, and/
or frequency of cleaning. Use softened
makeup water.
Inspect heater for surface corrosion or
pitting. If evident, consult
DRI-STEEM.
More on next page ...
VL3-IOM-0301-METRIC.pdf 73
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Summary of Contents for Vapor-logic3
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