Nortec SE Series - Manual (Page 83)

Troubleshooting | 80
Code Display
Message
LED System Detected Cause Corrective Action(s)
MTW
(Cont)
3 Humidifier configured
for Modbus but not
connected to network
3 Configure controls
correctly in “Control
Setting” level of
software (see Operation
Chapter).
4 Improper wire used 4 Use 120 Ohm
impedance shielded
twisted pair cable.
5 Noise preventing
humidifier from
detecting signal.
5 Eliminate source of
noise causing
interference.
NSW
No Signal
Warning
No
communication
is detected from
Master unit.
(This unit is set
up as slave)
1 Improper wiring 1 Check wiring
connections, polarity,
and type of wire used.
(See Staged Modulation
Wiring (SETC Only) on
page 31)
RDW
Remote
Disabled
The unit has
been remotely
disabled through
modbus
communication
or Nortec
Online. 1 Network signal
received by humidifier
to shut down.
1 Normal operation for
humidifier on network
control Contact
network administrator
to enable humidifier.
RHW
Rh High
Warning
The measured
RH is above the
RH High alarm
setting. 1 Setpoint higher than
RH alarm setting
1 If the humidifier is still
operating then check
and adjust setpoints.
RLW
Rh Low
Warning
The measured
RH is below the
RH Low alarm
setting.
1 Humidifier not running 1 Check why humidifier is
not running and put it
into operation.
2 Setpoint lower than RH
low alarm setting
2 Check and adjust
setpoints.
RMW
Rh Limit
Warning
Operation is
interrupted until
an input higher
than 3% is
received.
1 Sensor not powered 1 Use multimeter to
check that sensor is
powered.
2 Sensor not wired
correctly
2 Check wiring is secure
and wired correctly per
instructions in
installation chapter.
3 Defective sensor 3 Check if sensor is
outputting
corresponding to RH. If
not replace the sensor.
4 RH less than 5% 4 RH less than 5% are
interpreted as a broken
sensor. Contact Nortec
Representative for
recommendation.