Prescott Series Installation and Operation Manual
Page 34
The Diagnostic Lights flash as follows:
1.
The
Proof of Fire
switch. This switch will sense the temperature of the Exhaust rising
during start up. If the Exhaust temperature does not reach 110 degrees F, or if, during use, the
temperature drops below 110 degrees F, the stove will go into
“Internal Alarm”
and the Auger
will quit feeding fuel. Once the Stove completes the safety shutdown, the #3 LED will start
blinking.
(Read Frequently Asked Questions for more information))
2.
The
High Limit
switch. This sensor will sense if the unit reaches temperatures that are
too high for normal operation. If this happens the Auger will quit feeding and the #4 LED light
will start blinking.
(Read Frequently Asked Questions for more information)
3.
The
Vacuum
switch. For the Stove to operate correctly the firebox needs to be sealed.
During the first 30 seconds after the unit has been turned on, the control board will check to see
if the switch senses negative pressure (Vacuum) in the firebox of the Stove. If there is no
negative pressure, the Stove will go into “Safety shutdown” and the #2 LED will start blinking.
(Read Frequently Asked Questions for more information)
During “Normal Operation” a 60 second delay has been incorporated before the unit shuts down
when the board senses loss of vacuum. This is to accommodate opening the doors during
maintenance. Once the board senses loss of vacuum the ON/OFF light will start blinking. While
the light is blinking the control board will not feed any fuel nor respond to any of the buttons.
Once Vacuum has been restored the unit will revert to normal operation.
Unresponsive Control Board -
When the control board becomes unresponsive, the control
board may be in Internal Alarm. The control board has sensed one of the Safety sensors. This
may cause the unit to go out and flash a Diagnostic Code. In some cases, after waiting
approximately 45 seconds the Stove will start responding to the control board again. Many times,
the cause of this is a change in the vacuum inside the firebox. This may be caused by excessive
wind or by opening the Firebox door. The control board will monitor the vacuum switch and
resume normal operation if the vacuum returns to normal.
Caution: See Cleaning Cycle on page 28. The control board is locked out during the
cleaning cycle and may appear to be unresponsive. Simply wait until the cycle is complete
(Once the power light quits blinking) and the board responds again.
Safety Features
1.
”High Limit” switch”,
an overheat safety switch will shut off the fuel feed if the Stove
reaches temperatures above normal operating temperature. This is a “Normally Closed” switch.
If the High limit switch trips several times, the problem in the Stove
must
be diagnosed before
the unit is put back into service, (Defective Room Fan, dirty Room Fan, defective High Limit
switch or possibly a bad Control Board)
2.
Vacuum switch
also called the
Negative pressure switch
. When the Stove is turned on
the Exhaust fan will create a negative pressure in the firebox. The control board continually
checks to see if Negative Pressure (vacuum) is present during operation of the Stove. If the
exhaust venting system becomes clogged or obstructed, the firebox door is left open or the
exhaust fan quits working the control board will go into “Safety shutdown”.
