Railway Equipment 934, Operating Manual

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P/N R9340-0104 30 © 2010 RAILWAY EQUIPMENT CO.
REV B
5/11
B. FALL
1. Check all ductwork for clear airflow. Ensure that the point and track duct
nozzle screens are not damaged and are completely covering the openings.
Make sure that no debris or rodents have obstructed any area of the
ductwork.
2. Inspect the track duct nozzles for proper operation.
3. Remove the heat duct cover. Check the fuses and heaters.
Check the wiring to make sure rodents or vibration have not damaged the
insulation.
4. Check the airflow sail switch to make sure it is operating properly.
5. Replace the heat duct cover.
6. Install the control module and connect the wires.
7. Turn on the electric power at source.
a) Set temp setpoint above ambient temperature.
b) Place switch SS1 in the FORCE position.
c) Unit should start and run. Check for proper operation.
VII. TROUBLESHOOTING
A. UNIT DOES NOT START
1. Check circuit breaker.
2. Check control fuses. The control module has both replaceable and
auto resetable fuses. If the open fuse is an auto resettable type
fuse, it will reset after it cools down. Correct the problem
causing the fuse to open, turn the main circuit breaker off for one
minute, then turn back on.
3. Check for 18VAC between the following points:
TS1-9 and TS1-11
TS1-9 and TS1-12
Change T1 control transformer if either measurement is incorrect.
4. Check for air temperature below set point.
5. Is the control module programmed for a start-up delay?
6. Monitor the fault display on the control module.
7. Turn the circuit breaker off, then reset the motor overload relay.
The motor overload relay is adjustable. It should be set for the
motor name plate current.
8. Push the RESET Button (PB1).
B. LOW HEAT LEVEL
1. Check heater fuses for an open fuse.
2. Check the heating elements for an open heater.