Condair Nortec EL-Series, Operation And Maintenance Manual

Page: 77 / 96

77 Fault Isolation Nortec EL
2582954_D_EN_1811_Nortec-EL_OM
Problem Probable Cause Corrective Action(s)
Humidifier will not produce
steam, or does not reach RH
setpoint value.
Safety loop is open. – Check if the message "Safety Loop" is displayed in
the operating status area of the Home screen.
– Check if there is 24VAC supply at low voltage termi -
nal strip contact "2".
– Check that all On/Off devices connected to low
voltage terminal strip contacts "1" and "2" are wired
properly, and their contacts are closed when they
should be.
Output is limited by the high limit
humidistat signal.
– Check if the high limit humidistat is installed too
close to the humidifier, and if it is operating correctly.
No signal on Channel 1. – Check voltage between low voltage terminal strip
contacts "3" and "4". For a demand signal configura -
tion, the signal must be 27% of full scale signal for
the humidifier to start. For a transducer signal con -
figuration, the signal must be lower than the setpoint
value for the humidifier to start.
No signal on Channel 2 (on units
with Control Channels set to "Dual").
– Check voltage between low voltage terminal strip
contacts "3" and "5". For a demand signal configura -
tion, the signal must be 27% of full scale signal for
the humidifier to start. For a transducer signal con -
figuration, the signal must be lower than the setpoint
value for the humidifier to start.
Capacity has been manually
limited.
– Check/adjust Manual Capacity , if necessary.
Water conductivity is low. – Check if the message "Max Level" is displayed in
the operating status area of the Home screen. If the
water conductivity is low, it may take several hours
before the humidifier can reach full output capac -
ity. This is quite normal. The steam cylinder is not
drained to permit the mineral concentration (and
hence conductivity) to rise.
Humidifier displays warning
or fault message.
The control software has de -
tected an abnormal condition.
– Refer to "Nortec EL Warning and Fault List" on page 78 .
Steam Distributors
Table 10: General Troubleshooting – Steam Distributors
Problem Probable Cause Corrective Action(s)
Distributor spitting out water. Distributor not level. – Use end supports on the distributor to make sure
that it is level.
The condensate trap is too close
to the distributor.
– The condensate trap must be located a minimum
of 12 in (30 cm) below the distributor. Relocate, if
necessary.
Condensate line not sloped suf -
ficiently.
– The condensate line must have a minimum
downslope of 1.2°. Reinstall, if necessary.
Clogged condensate trap. – Make sure the traps allow water to flow freely.
Condensate line has double traps
in close proximity to each other.
– Condensate traps should not be in close proximity to
each other, to prevent air locks.
Steam line is not insulated. – If steam line is too long, condensate build up could
overload the distributor condensate port. Insulate
the steam line to improve efficiency, and install ad -
ditional condensate traps as required.
Condensation in duct. Installation clearances not
observed.
– Refer to distributor installation manual for required
clearances. Relocate the distributor, if necessary.
Design conditions changed. – Check supply air temperature and humidity to deter -
mine if conditions have changed.
High limit humidistat not function -
ing.
– Check setting and operation of high limit humidistat.
Replace, if defective.
Air proving switch not installed or
not working
– Check that the humidifier will only operate when air
is moving through the duct.
Improper location of high limit
humidistat.
– Check that the high limit humidistat is located where
it can detect high duct humidity.