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2008-08-28
Table 3. NH System Messages
NHTC Display Message LED state System Action Symptom Diagnosed
E5: Cylinder B Controller
missing
RED Humidifier is in standby until
problem corrected.
On power up, the controller cannot
detect the driver board for cylinder B.
E6: Extendet Missing RED Humidifier activates its fault
relay and interrupts its operation
until communication is fixed.
The slave unit is not in communication
with the master unit. Master unit
powered?
E7: CPU CRC fault RED Humidifier activates its fault
relay and interrupts operation.
Problem with the processor hardware
or software.
W11: Safety Loop Open GRN Humidifier goes on standby. ON/OFF controls wired between
terminal 1 and 2 are open.
W12: Cylinder Max Level NONE Fill valve interrupted. Water at top of cylinder.
E12: Cylinder max Level no
current
RED Humidifier activates its fault
relay and interrupts its
operation.
The high water sensor is activated but
no current is measured in cylinder.
W13: Fill Timeout GRN
blink
The humidifier will attempt to
clear any debris by pulsing the
drain valve.
The fill valve has been activated for an
extended period of time but water has
not reached the sensor.
E13: Fill: Timeout RED The fill valve has been activated
for an extended period of time
but has not reached the sensor.
Humidifier stops operation and the
fault relay is activated.
W15: Over current YEL The drain is activated to
decrease the water level in the
cylinder.
Measured current in the cylinder has
exceeded 115% of rated output.
E15: Over Current RED Humidifier interrupts operation
and the fault relay is activated.
Measured current in the cylinder has
exceeded 115% of rated output.
W16: Excess Current YEL Humidifier interrupts operation
and the fault relay is activated.
Measured current in the cylinder has
exceeded 115% of rated output.
E16: Excess Current RED Humidifier interrupts operation
and the fault relay is activated.
Measured current in the cylinder has
exceeded 130% of rated output.