Nortec SE Series - Manual (Page 82)

79 | Troubleshooting
Code Display
Message
LED System Detected Cause Corrective Action(s)
KWF
(Cont)
2 No steam supply to
humidifier.
2a Check that isolation
valve is not closed.
2b Check if boiler steam is
available.
2c Check if CV valve opens
using diagnostic output
test.
3 Condensate not
draining from heat
exchanger.
3a Check that F&T trap is
allowing condensate to
drain.
LKF
Leak Fault /
Warning
Red
Float level has
dropped multiple
times while no
steam is being
produced.
1 Steam leaking through
CV valve
1a CV valve actuator not
adjusted. Follow Figure
11: CV Valve Actuator
Installation on page 16.
1a CV valve defective.
Replace CV valve.
LKW
2. Auxiliary drain is
leaking.
2a Check that auxiliary
drain valve is closed
and is not leaking.
3. Tank or fittings are
leaking.
3a Check for leaks from
tank, tank covers, and
fittings.
LMI Limit Instable
Limit signal
Is not stable.
1 High limit humidistat
too close to steam
distributor
1 Locate the high limit
humidistat a minimum
of 10 feet (3 m) from
the distributor.
2 High limit humidistat
setpoint too low
2 Adjust the high limit
setpoint to 85% or
more.
3 Improper Proportional
and Integral settings in
control
3 Adjust proportional and
integral settings to
reduce swings in
demand signal.
4 Defective control 4 Replace defective
control
MEM Flash R/W Fault
Red
Controller
Memory failure
1 Software has detected
a hardware problem
with main control
board
1 Restart humidifier, if
error occurs within 1
minute replace main
control board. If error
does not occur then
primary power
fluctuation may be the
cause.
MTW
ModBus
Timeout No Modbus
signal
1 Loose connection 1 Check connections and
polarity of wires.
2 Incorrect Modbus
address
2 Check that Modbus
address of humidifier
matches that of master.