Sure Flame SL11B - Page 14

SL11B & S1500 Manual 934-6644 - Page 14
SL11B/S1500 TROUBLESHOOTING
For units incorporating Fenwall series 05-14 Ignition modules
An AC voltmeter is required to make these checks. Voltage is 115VAC on
the control circuit and the motor. Use extreme caution when checking
voltage.
1 Push start button and hold for 2 to 3 seconds.
2 Motor relay and control relay #1 close simultaneously.
1) If motor relay does not close check:
a) If there is power between the coil terminals of the motor starting
relay then the relay is faulty.
b) If there is no power between these two terminals then proceed to
check the delay timer.
c) If there is power between terminals 1 &2, and 2 & 3, but no power
between 2 & 6, then the timer is defective.
d) If there is no power between terminals 2 & 3 of the timer then check
the start switch.
e) If there is power at the red wire on the start switch and no power
at the middle terminal of the start switch, then the start switch is
faulty.
2) If control relay # 1 does not close then check:
a) If there is power present at terminals A & B of the control relay then
the control relay is defective.
b) If there is no power between these terminals then check the stop
switch.
c) If there is power on the common (middle) terminal of the stop
switch but no power on the NC terminal then the stop switch is
defective.
3 Fan Starts, if not check:
a) If there is power between the black and white wires inside the motor
junction box ( located on side of motor ) then the motor may need
manual resetting. Pushing the red button on the side of the junction
box. If this does not correct the problem then the motor is faulty.
b) If there is no power at these two wire ends then check the motor relay
contacts, they may need cleaning or replacing, if burnt.
4 Fan reaches full speed, airswitch closes, and white light comes on, if not
check:
a) If there is power on only one of the airswitch terminals while motor
is running, then the airswitch is staying open. First check
if either the upstream or down stream airtubes are plugged.
b) If both are free then check alignment ( tubes must be positioned
parallel to the direction of airflow ).