CARNES HBGH Installation, Operation And Maintenance Manual page 29

TROUBLE SHOOTING - SYMPTOM, CAUSE AND ACTION
SYMPTOM
No LCD display
Humidifier unable to
reach maximum output
or required set-point
The water contained in the cylinder must be controlled, in order for the humidifier to function properly. The fill and drain
rates must be maintained. Filling too quickly can cause over-amping and automatic shutdown, circuit breaker tripping or
blown fuses. Filling too slowly can cause insufficient steam output or insufficient humidity levels. Water supply pressure
should be between 30 and 80 psig, ideally 55 to 60 psig. Draining too quickly can cause dangerous arcing and elec-
trode corrosion. Draining too slowly can cause over-concentration and malfunction due to foaming. These are just some
examples of what can go wrong if the fill and drain rates are not controlled and maintained.
CAUSE
*The LCD has been dimmed.
*Voltage to the humidifier is not that which is
required per rating label.
*3 phase voltage but not all legs have power.
*Internal or external circuit breakers are not
closed.
*24 VAC supply to circuit board is not available.
*Capacity of unit is too low.
*Too high of a system static pressure.
*Back pressure in steam hose too high.
*Foaming.
*Wrong cylinder.
WATER CONTROL
(Continued)
ACTION
*Touch LCD screen.
*Change humidifier or make necessary changes to
confirm compatibility.
*Check electrical connections and make necessary
repairs or hook ups.
*Close all circuit breakers.
*Make sure the protection on the transformer is not
tripped (fuse or breaker). Confirm the required 24
VAC is leaving transformer. Make sure connection
to circuit board at J1 is intact. If situation does not
resolve, replace circuit board.
*Determine proper load calculation & capacity of
humidifier. Use properly sized unit.
*Supply air system must be evaluated if static
pressure is too high. Located & correct issue.
*Too long of steam line runs, sags, dips, horizontal
runs not allowing for proper condensate removal,
improper sloping of steam lines & condensate line.
*Remove impurities inside the cylinder. If cleaning
of cylinder was attempted, throw away.
*Make sure proper cylinder and configuration is
used.
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