Troubleshooting | 74
No. Display
Message
LED System Detected
Cause Corrective Action(s)
W13
Fill Timeout
Fill valve
activated for long
time but high
water level not
reached.
Water level in
cylinder should
rise faster than
1” per minute.
1 Drain valve leaking or
stuck open
1 Clean drain valve or
replace (see
maintenance chapter)
2 Water shut off valve
closed
2 Open shut off valve
3 Fill Valve strainer
blocked
3 Clean out strainer on fill
valve inlet.
E13 Red
4 High system back
pressure
4a Check for kinked hose
4b Check for proper
condensate removal (see
installation chapter)
4c Install fill cup extension
5 Air flow into cylinder
through steam line
5 Disconnect steam line,
let cylinder fill part way,
then reconnect steam
line.
W15
Over Current
Current has
exceeded 115%
of max
1 Drain blocked water
over concentrated
1 Clean the drain line
2 Drain solenoid not
energized, water over
concentrated
2 Check and correct wiring
to drain valve.
3 Filling too fast, fill valve
damaged
3 Replace the fill valve
4 Filling too fast, wrong
fill valve
4 Check for correct fill
valve in parts list, replace
if incorrect
E15 Red
5 Wrong cylinder 5a If cylinder replaced
check if it is the same
model as the one
removed.
5b Check water
conductivity and check
with Nortec
representative for
alternate cylinder.
6 Condensate from Other
source feeding to
humidifier
6 Remove any condensate
lines that are not from
the humidifier’s steam
distribution system.
7 Contactor seized /
sticking
7 Check if contactor
disengages when turned
off, replace if defective.
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