Specifications

10
CRUV
TM
TROUBLE-SHOOTING GUIDE (LW417 Electronic Water Level System Only)*
MODULE INDICATING
LIGHTS
PROBLEM FULL READY DRAIN POSSIBLE CAUSE RECOMMENDED ACTION
WATER
Humidifier will Off Off Off Control transformer Verify control voltage across secondary
not heat leads of transformer. Reset transformer
circuit breaker.
On On Off Humidistat is not calling Set humidistat to call. Inspect for faulty
humidistat.
Safety controls open Check safety controls, air flow switch, high
limit humidistat, etc.
Faulty control board Verify control voltage between terminals.
Probe head deterioration** Replace probe head.
Humidifier will Off Off Off No water pressure at valve. Check water supply/shut off valves.
not fill
Faulty water fill valve Verify action of fill water solenoid valve by
turning control module switch from standby
to normal op. Audible click should be
heard as solenoid operates.
Plugged strainer Check strainer.
Plugged valve Check valve.
Faulty control board Verify control voltage across input terminals
"B&W"
Humidifier does Off Off Off Lack of tank to probes Jumper wires violet, orange then brown to
not stop filling electrical continuity. Water ground. If water stops, verify tank ground;
conductivity 100 check water supply conductivity; then
microSiemens/cm (2 gr/gal) min. consult factory.
Fill valve is stuck open Check valve for foreign matter.
Drain Valve not closed Check for correct water flow through valve
Fill valve installed backward note arrow.
Off Off On Auto-drain mode 10 Minute must complete first.
Low output On On Off Electric drain valve not Correct cause of leakage or replace valve.
seating
On On Off Fill valve is stuck open Check valve for foreign matter.
Unit short cycles
On & Off On Off Probes may be incorrectly Confirm that unit is wired per diagram.
wired or need cleaning Clean probe rod tips with steel wool.
Reduced or no On On Off Heater malfunctioning Verify that proper voltage is being applied to
output even heaters. Check heater (amp draw and
though water compare to wiring diagram ratings).
is at the proper
level
Malfunctioning control Heater contactor not functioning--replace.
system Service fuses blown. Auxiliary limit controls
not allowing system to operate (dust humidi-
stat, air flow proving switch, etc.). Reset,
replace or calibrate as required. Faulty or
inaccurate humidistat, replace or calibrate.
*For VAPOR-LOGIC
3
trouble-shooting, see the VAPOR-LOGIC
3
Operations and Maintenance Manual.
**Probe rod corrosion or probe head material aging may cause level control system failure. This generally does not occur in the first two years of operation.