Nortec SE Series - Manual (Page 85)

Troubleshooting | 82
SEP Faults
The self-diagnostic system built into the SEP can display some fault conditions by flashing the
yellow “Service” LED in sequence. The SEP does not display any warnings.
Faults

If the humidifier is not able to self correct a problem symptom it will if necessary respond by
shutting itself down.

When this occurs the humidifier illuminates the red “Fault” LED, Flashes the yellow LED in a
numerical sequence, shuts off the signal to the CV valve actuator, and activates the “Error”
relay of the remote relay board.
Clearing a Fault

Count the number of flashes of the yellow LED and take any necessary actions to correct the
cause(s) as outlined in Table 14: Troubleshooting SEP Faults.

Power cycle the humidifier with the On/Off switch waiting 3 seconds between turning it off
and on.
Table 14: Troubleshooting SEP Faults
Number of
Flashes / Fault
System Detected Cause Corrective Action(s)
One Flash
Humidifier Drain
Fault Water level is not
dropping when
pump is activated.
1 Internal drain
blocked
Check if water drains from unit when drain
manually activated. If not then;
1a Check restrictor in drain line immediately after
pump for blockage.
1b Check pump rotor to see if it is blocked.
1c Check if scale has built up in sump at bottom of
tank and caused a blockage.
2 External drain
blocked
2 Check that water can flow freely through drain
lines.
Two Flashes
Humidifier Fill
Fault Water level not
rising or not
detected.
1 Water shut off
valve closed
1 Open shut off valve
2 Auxiliary drain
leaking
2a Close auxiliary drain valve if unit does not have
freeze protection.
2b Check freeze protection valve is closed if freeze
protection installed.
3 Fill valve
strainer blocked
3 Clean out strainer on fill valve inlet.
Four Flashes
Inconsistent
Float Level
Floats have
indicated water
level not changing
in sequence.
1 High cooling
flow into float
chamber
1a Check that orifice in fill valve is in place. Flow
should be very low.
1b Check if tank fill and float cooling lines are
reversed. Flow to float chamber should be very
low. Tank hoses to centre of float chamber.
2 Defective float
board.
2 Observe LED’s on float chamber as tank fills. If
LED’s do not light in sequence replace float
chamber and float board.