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2 Blink Status Details:
DVC 500-C
Firebox Static Pressure
Safety Protocol
The DVC-500 operates with a negative pressure
rebox as a safety feature. The control continuously
adjusts the draft motor speed to maintain a safe re-
box negative static.
NOTE: Observe the intensity of the Draft Motor
light on the control panel in comparison with the
Feed Motor light when it is on. When the appliance
and venting system are clean, the indicator light is
much dimmer than the others. This is because there
is lower voltage owing to the draft motor. As ashes
build up, the light will get brighter because the draft
motor needs to run faster in order to maintain the
negative pressure in the rebox. When the indicator
light for the draft motor appears as bright as the rest
of the lights, it is a good indication that it's time to
clean the appliance and the venting.
If the circuit board is owing full line voltage to the
Draft Motor, and the negative pressure in the rebox
is too low, the following safety protocol will begin.
Stage 1
When the safety switch senses a loss of negative
pressure in the rebox for more than 68 seconds the
following happens:
The combustion blower will reduce in speed.
During this cool down period the feeder is allowed
to opreate. If needed, the feeder can opreate for up
to 3 minutes.
After 72 minutes, if the safety switch has not sensed
another pressure loss, the unit will automatically go
back to the control board setting.
If the safety switch senses a loss of negative pres-
sure anytime during the STAGE 1 Protocol, the unit
automatically goes to the STAGE 2 Protocol.
Stage 2:
If Stage 1 has already begun and the negative pres-
sure is lost:
The status light will start to blink ( 2 blinks ).
The combustion blower and feeder motor will shut
off. These motors will remain off for a 5 minute cool-
down period. After ve minutes, those components
will restart at a reduced feed rate ( 30 seconds max.)
for 72 minutes.
After 72 minutes, if the safety switch has not sensed
another pressure loss, the unit will automatically go
back up to Stage 1.
The status light will continue to blink (2 blinks)
throughout Stage 1 and Stage 2.
If the safety switch senses a loss of negative pres-
sure anytime during the Stage 2 Protocol, the unit
automatically goes to the Stage 3 Protocol.
Stage 3:
During stage 2, if another loss of negative pressure
is sensed;
The status light will continue to blink 2 blinks.
The Distribution Blower will be cycling "high" to
"low" as an audible warning.
The Combustion Blower and Feeder Motor will
shut off.
When the unit reaches Stage 3 these motors will not
restart.
The Draft Motor will continue to run at maximum
voltage, but the re will go out.
[At any time, the 2 blink status can be reset by
disconnecting the power to the unit for a few
seconds.]
CAUTION
Resetting a 2 Blink Status likely indicates
that service is required.
Clean the appliance and the venting system
thoroughly. If the error persists, contact
your dealer for more advanced service.