Troubleshooting Guide - DriSteem Vapormist Installation, Operation And Maintenance Manual

Troubleshooting guide for standard water models
PROBLEM
Humidifier does not
heat.
Humidifier will not fill.
Humidifier does not
stop filling.
Low output
Unit short-cycles
Reduced or no output
even though water is at
the proper level
Note: Probe rod corrosion or aging probe head material may cause level control system failure. This
generally does not occur in the first two years of operation.
VAPORMIST ®

TROUBLESHOOTING GUIDE

POSSIBLE CAUSE
Incorrect or nonexistent supply voltage
to unit
Incorrect or nonexistent control voltage
Humidistat not calling
Safety controls open
No water pressure at valve
Faulty water fill valve
Plugged strainer
Plugged valve
Faulty control board
Lack of tank to probe electrical
continuity
Fill valve stuck open
Drain valve not closed
Fill valve installed backward
Autodrain mode
Electric drain valve not seating
Fill valve stuck open
Controller cycle rate set too low
Heater malfunctioning
Malfunctioning control system
RECOMMENDED ACTION
Check main line safety switch.
Check main line fuses.
Check for proper supply voltage.
Reset control transformer circuit breaker.
Check for 24 VAC control circuit voltage at T-1 and T-2 on the
control board.
Set humidistat to call. Inspect for faulty humidistat.
Check safety controls, airflow switch, and high limit humidistat.
Check water supply/shut-off valves.
Check for 24 volts at the fill valve.
Check strainer.
Check valve.
Verify control voltage across the fill valve output.
Water conductivity must be 2 grains/gallon (100 µS/cm) or
34.2 mg . Add salt to the tank. If this does not solve the
O
problem, consult factory for further advice.
Check valve for foreign matter.
Verify that lever on drain valve is in closed position.
Check for correct water flow through valve by noting arrow.
Humidifier may be in periodic drain and flush. Check controller
display.
Correct the cause of leakage or replace valve.
Check valve for foreign matter.
Adjust heater cycle time using the VAPOR-LOGIC
setup menu. See the VAPOR-LOGIC
information.
Verify that proper voltage is being applied to heaters. Check
heater amp draw and compare to wiring diagram ratings.
Replace heater contactor if not functioning. Verify auxiliary limit
controls (humidistat, airflow proving switch, etc.) and reset,
replace or calibrate as needed.
keypad
3
manual if you need more
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