Railway Equipment 934, Operating Manual

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P/N R9340-0104 18 © 2010 RAILWAY EQUIPMENT CO.
REV B
5/11
c) FORCE: Placing SS1 in the FORCE position enables the snow melter dependant on
outside air temperature. The snow melter will remain on until FORCE is
turned off. This is useful for on site testing. To use the FORCE position to
operate the EHAB during warm weather, increase the TEMPERATURE
SETPOINT on the SETPOINT menu until it is above ambient air temp.
2. RESET – (PB1) Pressing PB1 resets processor.
3. MODE – (SS2) Momentary switch used to navigate up or down through the display
screens.
4. SELECTOR DIAL – (RC1) Rotary encoder used to change adjustable parameters
on the displayed screen.
LED STATUS INDICATORS
1
AIR TEMP:
This indicates the ambient air temperature is below set point.
2 MOISTURE DETECTOR:
This indicates that the optional snow detector sensing head(s) senses moisture.
3 REMOTE
CONTROL:
On when there is a circuit closure across terminal posts 1 and 2.
4 SAIL SWITCH:
On when the sail switch in the air stream is sensing adequate airflow.
5. INDICATION:
On when there is a circuit closure across terminal posts 1 and 2 and the unit is
operating, or the air temperature is above the set point. Also may be on when
there is a fault condition under snow detector.
6. FAIL:
Is on when ever a fault is present.
THE DISPLAY
The display works as follows: While the EHAB is not running,
temperature setpoint and actual outside temperature will be displayed.
When EHAB is running, the display will show outside temperature and the
operation currently being performed. Following are all possible messages
that can appear on display during operation. The display has a screen saver
built in. After no user action, such as turning dial or changing mode
switch has occurred for 10 minutes, the display will power down. To
retrieve the display, rotate the selector dial.