Nortec NH-EL Series - Manual (Page 83)

Troubleshooting | 80
Display Message LED
System
Detected
Cause Corrective Action(s)
Staged
Modulation
Warning
Red
Slave unit not
communicating
with Master Unit.
1 Master unit not
configured correctly
1 Check configuration of
master as outlined in
Multi Mode
Configuration
2 Slave unit not
configured correctly
2 Check configuration of
slave as outlined in
Multi Mode
Configuration
3 Wiring to master unit
disconnected
3 Check that wire
connected to J10 of
Master and Slave and
that polarity is not
reversed
4 Incorrect wire type used 4 Use 18-24 AWG multi-
strand, twisted pair,
shielded cable
Unstable Control
Warning
Demand
swinging from
low to high
rapidly
1 Improper Proportional
and Integral settings in
control
1 Adjust proportional and
integral settings to
reduce swings in
demand signal.
2 Control humidistat
installed too close to
diffuser or doorway to
un-humidified space
2 Install humidistat so
that it senses air
representative of space
being humidified.
3 Defective control 3 Replace defective
control