16
Fault-finding
Fault-finding table
If the humidifier fails to function properly, the check list below
may help in finding the fault before contacting the Munters
service organization. The plant’s maintenance personnel will be
able to easily identify simple faults with the help of the check
list.
Fault indications
Possible fault
Remedial measures
Water leaking from unit.
Discharges pipe damaged or improperly
connected
Check all connections. Replace if necessary.
Reservoir or connection pipe leaking.
Look for leaks in the reservoir and connec-
tions. Tighten or replace the faulty material.
Condensate problem.
Insulate tray and water pipes.
Water droplets entrained in airflow.
Cassettes are not properly mounted.
Check that the cassettes have been installed
correctly according to the airflow arrows and
that the seals between the cassettes are not
leaking.
The distribution header has been damaged
or improperly installed.
Check that the connections are not damaged
and not leaking. Check that the distribution
header has been installed properly and that
the snap catches are in the locked position.
The airflow rate is too high.
Measure that the air velocity rate across the
humidifier surface. Reduce the velocity if too
high, or install a droplet separator.
Uneven water distribution over the cassettes.
The holes in the distribution header have
become clogged by minerals.
Clean the hole or replace the distribution
header, if necessary.
Insufficient water to the distribution header.
Check the function and direction of rotation
of the pump. Clean the distribution header.
Check the water level in the reservoir and
adjust the float valve if necessary.
Excessive calcium deposits on the inlet side
of the cassettes.
Excessive mineral concentrations in the reser-
voir.
Check the bleed-off flow. Adjust if necessary.
The water quality has changed.
Measure the water quality and adjust the
bleed-off flow if necessary.
Calcium deposits on some parts of the cas-
settes.
Uneven water supply.
Check that the water-distribution system
does not leak or that it has not become
clogged. Clean or replace faulty parts.
The interval between humidifier being on
and off is too short.
Check how the humidifier is controlled.
Change the cycle time if necessary.
