Nortec SE Series - Manual (Page 76)

73 | Troubleshooting
General Troubleshooting
The following section provides general guidelines for troubleshooting the SETC/P humidifier and
auxiliary components. For detailed troubleshooting information refer to the manuals that were
provided with the auxiliary equipment, to Table 13: Troubleshooting Warnings and Faults, and to
Table 14: Troubleshooting SEP Faults later in this chapter.
Humidifier
Table 12: General Troubleshooting
Symptom Cause Corrective Action(s)
Nothing happens when On/Off
switch is turned on. 1 Fuse blown
1 Check inline fuse in yellow housing
between transformer and driver
board. Check and replace fuse on
driver board.
2 Incorrect or no Voltage 2a Check voltage against spec label and
correct.
2b Check disconnect and insure
humidifier is getting power.
3 Step Down Transformer not
outputting 24VAC
3 Replace the transformer
Humidifier will not humidify or
not reaching RH setpoint 1 Safety loop open
1a Check if green led is flashing on the
humidifier’s display.
1b Check if there is 24 VAC at terminal
2.
1c Check wiring and operation of On/Off
devices connected to terminal 1 and
2. Ensure they are closing when they
should be.
2 High limit limiting output 2 Check if the high limit is installed too
close to the humidifier and if it is
operating correctly.
3 No signal on Channel 1
3 Check voltage between terminal 3
and 4. For demand configuration
15% of full scale signal must be
present for humidifier to start. For
transducer configuration the signal
must be lower than setpoint for the
humidifier to start.
4 No signal on Channel 2
(For units configured for dual
channel operation). 4 Check voltage between terminal 5
and 3. For demand configuration 15%
of full scale signal must be present
for humidifier to operate. For
transducer configuration the signal
must be lower than setpoint for the
humidifier to start..
5 Capacity has been manually
limited
5 Check Manual Capacity on status
screens. Adjust “Manual Cap” in the
“Control Setting” menu if necessary.
Humidifier has faulted or has
a warning 1 Software has detected an
abnormal condition
1 Refer to Table 13troubleshooting
warnings and faults.