SKE Humidifier
User Manual
23
9.1.3. Diagnostic
mode
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.
SA FE T Y
O P E N
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 HRM-X or HDM-X 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 HDM-X 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.
