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Sensor Status Lights
When starting the troubleshooting process, the first thing to check the User Interface (UI) board, (touch controls
on the hopper lid) and see if there are any fault codes. Make note of the codes and clear them by pressing the
power switch 2 times. The display should say “Clearing” and then the stove will go into cool down mode. Press
the start button again to begin the startup process and pay close attention to the AC components in the appliance.
Make note of what runs and what does not before the fault code reappears on the control board. Armed with this
information, follow the steps below to narrow down where the problem lies.
1. Locate the PCB and check the System status light. The status light should be blinking at a rate of (1)
flash per second. If it is flashing faster, you may be having an issue with the UI board or the wires going
to it. Check the wire for damage and check the connection to the PCB. If you cannot resolve the fast
flashing code, replace the UI board.
2. Check the status lights of the sensors. If all sensors are working properly and the stove is cold the status
should be as follows:
a) TStat Status – This light indicates whenever the thermostat is calling for heat. Light on indicates
a call for heat, light off indicates a no call for heat. The light will function the same way if you are
using the internal or external TStat.
b) OTemp Hopper status– This light indicates the status of the Hopper High Limit Disk or Overtemp
Disk. Since this disk is a “Normally Closed” or NC disk, this light should be lit. If it is not then a
continuity test should be done on the disk. Disconnect the wires from the disk and use the “tone”
setting or measure resistance in Ohms (Ω). If you measure resistance or get tone when touching
the two posts on the disk then the disk is not the problem. Check the wires for damage and
continuity.
c) OTemp HRD status – This disk operates the same as the OTemp Hopper disk but it sensing the
temperature on the Horizontal Rotating Disk assembly (HRD). Follow the steps above in the
OTemp Hopper status section for this disk as well.
d) Proof of Flame status – This indicates the status of the “System Disk” aka the “Proof of Fire Disk”.
This disk is a “Normally Open” or NO disk. When the stove reaches temperature, the disk proves
to the PCB that the stove has actually lit by sensing the temperature change on the firebox. If the
stove is cold, the light should not be on. If the light is on, the PCB believes that the stove has fire
in it and will start to feed pellets into the burn platform. The Convection blowers will also be on.
Symptoms of this disk being stuck on would be:
•
Overflowing pellets off the burn platform.
•
Convection blower coming on as soon as power is supplied to the stove.
•
Combustion blower that does not shut off at all.
3. Pressure Switch Status – This light shows that status of the Pressure or Flow switch. The flow switch has
a diaphragm inside of it. When vacuum is supplied to one side of the diaphragm, the diaphragm moves
and completes the electrical circuit, which sends an electrical signal to the PCB and proves that the fan is
operating. If the appliance is running, the switch should be on. Whenever the Combustion fan is
operating, the light should be on.
When a
COLD
stove is trying to run but the Pressure switch is not activated, the PCB will provide power
to the combustion blower and the push auger for 15min as part of the “Fault Post Purge”. The push
auger is always in operation when the exhaust blower is on. The PCB will not distribute power to any
other AC powered component during this purge.
When a
HOT
stove has an APS fault, the same process will occur but there will be one additional step.
The HOT stove will go into a “Fault Cool down” mode until the system disk (aka Proof of Fire) closes. At
that point, the stove will enter the “Fault Purge” mode for 15min. After the 15min, the stove will enter a
“Fault Idle” mode (power light will alternate between Red and Green. An error code will show on the UI
board and will need to be manually cleared before the stove will attempt to operate again. To clear the
code, press the power button once. Press the power button one more time to restart the stove.
Summary of Contents for Deerfield
Page 19: ...Page 19 17602010 12 15 17 5 Remove the vacuum hose from the flow switch ...
Page 44: ...Page 44 17602010 12 15 17 5 Remove the vacuum hose from the flow switch ...
Page 66: ...Page 66 17602010 12 15 17 Appendix A Wiring Diagram ...
Page 67: ...Page 67 17602010 12 15 17 Appendix B Control Timing ...
Page 69: ...Page 69 17602010 12 15 17 Appendix C Power Control Board Pinout ...
