Troubleshooting | 70
Symptom Cause Corrective Action(s)
5 Capacity has been manually
limited
5 Check Manual Capacity on status
screens. Adjust “Manual Cap” in the
“Setting” submenu of the “Control
Setting” menu if necessary.
6 Low conductivity water 6 Check if W12: Cylinder Max Level is
displayed on the humidifier’s display. If
operated on low conductivity water it
may take several hours for the
NHTC/PC to reach full output capacity.
This is normal. During this time the
humidifier will not perform any drains
and the conductivity of the water in the
cylinder will increase.
Humidifier has faulted or has
a warning
1 Software has detected an
abnormal condition
1 Refer to table 8 troubleshooting
warnings and faults.
Steam Distributors
Symptom Cause Corrective Action(s)
Distributor spitting out water 1 Distributor not level 1 Use support at end o distributor to
ensure it is level.
2 “P” Trap too close to distributor 2 “P” Trap must be a minimum of 12 in
(30 cm) below the distributor to
ensure flow. Relocate if required.
3 Condensate line not sloped
sufficiently
3 Sufficient slope to insure flow is
required. Reinstall if required.
4 Trap blocked 4 Check that water flows through trap.
Clear out if blocked.
5 Condensate line double trapped 5 Condensate lines must not have two
traps in sequence. This can cause an
air lock and prevent water draining.
6 Steam line not insulated 6 If steam line is long condensate build
up could overload distributor
condensate port. Insulate line to
improve efficiency and install
additional condensate traps as
required.
Condensation in duct 1 Installation clearances not
observed
1 Refer to distributor installation manual
for required clearances. Relocate
distributor if required.
2 Design conditions changed 2 Check supply air temperature and
humidity to determine if conditions
have changed.
3 High limit not functioning 3 Check setting and operation of high
limit. Replace if defective.
4 Air proving not installed or not
working
4 Check that the humidifier will only
operate when there is air moving in
the duct.
5 Improper location of high limit 5 Check that high limit is installed where
it can detect high duct humidity.
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