25
3-90-233R24_11/13
Power Light
Indicates power to the control
board. (Ready)
Status Light
Will be lit anytime the unit is
in operation.
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.
Max Temp dial
The “Max Temp Dial” is used to set the desired
maximum operating temperature of the boiler.
7 blinks:
Boiler water overheat safety shut down (220
Degrees F.) This requires a manual reset by cycling the main
power off for a few seconds and re-connect.
Explanation and Importance of the Overheat Safety Zone
When the unit is operating at High burn, and all demand
from the heating system stops, the control will reduce the
feed rate and shut down completely as necessary. This may
take several minutes, and the remaining heat may cause the
water temperature to rise to over 210 degrees F. When this
happens, the OVERHEAT SAFETY ZONE light on the control
will illuminate and the relay R1 is energized. This will close
contacts #5 and #3 (Fan Contacts on the interconnection
Page 20), and will also energize the controlled circulator
outlet, for the hot water dump zone.
When using a hot water coil in an air duct system, if you
do not want the living space heated beyond the thermostat
setting during an over heat dump, an alternate dump zone
will need to be installed and some internal control re-wiring
will be necessary.
Feed adjuster
Sets the maximum feed rate
Test
Combustion blower, feed
motor and safety dump
zone are fully energized for
the first minute. Then, the
combustion blower will stay
on low.
Overheat Safety Zone Light
Indicates that the boiler water
temperature has reached
210 Degrees F.
Igniter Light
Indicates power to the igniter
Lighting Mode Selector
Switched between Auto and
Manual lighting.
Mode Selector/Min Temp
Dial
Used to turn the boiler on or off
and set the desired minimum
operating temperature of the
boiler.
Status light error messages:
3 blinks:
Indicates that the ESP (Exhaust Sensing Probe)
has gone out of range too many times. If the unit is operating
correctly, perform a manual reset by cycling the main power
off at the circuit breaker for a few seconds. If the 3 blinks
persist, contact your service technician.
4 blinks:
Indicates mis-communication with the aquastat, or
the aquastat is not attached properly. May require a manual
reset (turn off power at circuit breaker). Note that in some
optional control methods, this status will occur during normal
operation and reset automatically.
5 blinks:
(In Auto Light Mode Only)
Indicates that the igniter has failed to light the fire
after 40
Minutes.
To reset - Turn the Mode Selector/Min. Temp. to
OFF and then back to the desired temperature.
6 blinks
: Indicates that the control has calculated poor or
incomplete combustion occurring for 25 or more minutes.
A six blink status may occur if the stove is allowed to run out
of pellets. To reset, turn Mode Selector/Min Temp dial to “OFF”
then back on to the desired temperature. If the unit was not
out of pellets, see Troubleshooting section for more details.
Diagnostic Port
For maintenance only.
Requires special DDM
monitor supplied to trained
technicians exclusively.
Operation
label from unit control panel showing outlets
