Nortec ME Direct Feed - Manual (Page 33)

33 Fault elimination
6 Fault elimination
Important! Most operational malfunctions are not caused by faulty equipment but rather by improper
installation or disregarding of planning guidelines. Therefore, a complete fault diagnosis always involves
a thorough examination of the entire system. Often, the installations have not been properly executed,
or the fault lies with the humidity control system.
6.1 Malfunction list
Malfunction Cause Remedy
Residual water in the section
of the duct downstream of the
evaporative module.
Face velocity is too high. Systems
without droplet separator max
3.5 m/s (689 fpm), systems with
a droplet separator max. 4.5 m/s
(886 fpm).
Install droplet separator or reduce air
velocity in the duct.
Water tank, water piping or hydraulic
manifold is leaking.
Check/seal water tank, water piping
and hydraulic manifold.
Water flow to media too high. Check/replace flow restrictors in the
hydraulic manifold.
Evaporative cassettes have become
blocked with minerals.
Check set up, replace evaporative
cassettes, perform system service.
Uneven or non laminar air flow. Check design conditions of AHU.
Install perforated plate on the air
supply side.
Air on temperature is too low. Check design conditions of AHU. and
increase temperature.
Humidity/cooling demand
present however the Nortec ME
Direct Feed does not humidify.
Shut-off valve in the water supply
line closed.
Open shut-off valve.
Site control are not correct. Prove controls and control module.
Maximum humidification/cooling
capacity is not reached.
Insufficient water supply capacity. Check water supply, increase water
pressure.
Evaporative cassettes have become
blocked with minerals.
Check set up, replace evaporative
cassettes, perform system service.