Harman® • PF-120 Owner’s Manual_R3 • 2014 -___ • 10/14
7
3-90-08120c
C. Control Explanation
Status Light
Will be lit in either automatic
or service mode when
pointer is not within off
position band except after
normal shut down.
Combustion Blower Light
I n d i c a t e s P o w e r t o
combustion blower
Feed Motor Light
Indicates
Power to the feed motor.
Temp dial
The “Temp Dial” should be in the “Normal Setting” position except when service
work is being done. It also allows you to adjust the fire temperature when the
“Mode Selector” is in “ Service Mode” using the scale marked from 1 to 7.
Note: Due to variations in the electronics of the control board and wall control
this is an approximate temperature and may vary +/- 2°
Feed adjuster
Sets the maximum feed rate
Test
Runs all motors at full speed
for one minute to check
operation. After one minute
the combustion blower will
go to it’s minimum speed
and remain there. This is to
allow for low draft voltage
adjustment.
Low Fuel Light
Indicates that fuel in the
hopper is low and needs to
be refilled. Low Fuel LED
stays on for 15 seconds
after new fuel covers
sensor.
Igniter Light
Indicates power to the
igniter
Lighting Mode Selector
Switched between Auto and
Manual lighting
Mode Selector
See explanation below.
Diagnostic Display Port
Requires special DDM monitor
supplied exclusively to service
technicians.
Power Light
Indicates power to the
control, and is also used
during “Test” to check the
Low Fuel Sensor operation.
LED will blink to indicate
battery back-up shutdown
if applicable.
