SK300-XL Steam Humidifier
24
List of alarms
When the following conditions occur, the diagnostic messages override the scrolling information:
Display Description
Comment
N O
D E M A N D
No demand
Modulating humidifier: No analog signal to the humidifier.
On/Off humidifier: Humidity level has exceeded the set point
of the humidistat or humidity level has exceeded the set
point on the high limit humidistat or airflow is not detected by
the air pressure switch.
Safety open
Humidity level has exceeded the set point on the high limit
humidistat or airflow is not detected by the air pressure
switch (modulating humidifier only).
D R A I N
C Y C L E
Drain cycle
The humidifier is in the automatic drain mode.
C O N T A C T
D E L A Y
Contact delay
15 second delay for the power contactor to be activated.
O V E R
H E A T E D
Overheated
The temperature inside the container has exceeded the
boiling temperature. The humidifier has automatically shut
off.
P R O B E
D E F E C T E D
Defected probe
The water level sensor is not operational. The humidifier has
automatically shut off.
N O
L E V E L
No water
Water has not reached the level probe
F O A M I N G
C Y C L E
Drain foam
AFEC (Anti Foam Energy Conservation) detects foam.
The humidifier drains for a few minutes and returns to
normal operation.
D R N / P R O B
B L O C K
Drain or probe block
The humidifier drains but the water level does not decrease,
the humidifier has automatically shut off.
Verify
RH Sens
Verify RH sensor
Signal from either SHR10 or SHC80 used as space sensor
is lower than 0.49 Vdc to terminal # 6 of humidifier.
There might be a connection problem or a defective sensor.
Verify
DCT Sens
Verify Duct sensor
Signal from SHC80 used as Hi limit duct sensor is lower
than 0.49 Vdc to terminal # 4 of humidifier.
There might be a connection problem or a defective sensor.
S A F E T Y
O P E N
