Harman Coal Stoker VF3000 - Manual (Page 21)

21
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troubleshooting
Feeding Problems
wet Coal:
Wet coal does not flow the same as dry coal, therefore; the
feed rate will change with wet coal. If it is too wet, it may not
feed at all. Wet coal can also cause a sulfur odor.
wrong Size Coal:
The Verti-Flow™ System is designed to burn rice coal (or
buckwheat coal if rice is not available). If buckwheat coal is
burned, raise the draft setting from .04 to .06. Larger coal
will not feed or burn properly.
hopper Blocked:
Sometimes wood, paper, or other foreign objects accidently
end up in your coal bin and can slow down or block the flow of
coal. You may have to empty the hopper to find the blockage.
Pusher Out of adjustment:
This can happen when more than one person tend the stoker.
One person does not tell the others what adjustments were
made.
Problem: No motors or lights will turn on.
Solution:
1. Check AC power cord to the stoker control
2. Check the 3 amp fuse on the side panel of the stoker
timer. (replace only with a 3 amp 3 ag slow blow fuse.)
Problem: Lights on the stoker control are on, but motors
will not operate.
Solution: Check the AC power plugs from the motors (are
they securely plugged into the correct outlet?)
Problem: One of the motors will not operate.
Solution: Check if the light above the receptacle is lit. Check
the AC power plug from the motor (is it securely plugged
into the correct outlet?”
Stoker Control troubleshooting
gas Odor Problems
gas alarm goes Off or Sulfur Odor exists:
A sulfur smell may be noticed when a door is opened during
operation with wet or damp coal. This is normal. However, it
is not recommended that wet coal be used or the doors be
opened for more than a few seconds while burning to inspect
the fire or remove ashes.
lack of draft or a down draft in the chimney: These will
cause gases to escape from the unit. No unit will function
properly without draft. Any draft problem should be corrected
before use.
A draft inducer may be installed to increase draft in marginal
situations. The installation should be performed by your
dealer who is factory trained to correct any problems on initial
start up. After proper installation, many years of trouble-free
operation can be expected.
Problem: The motors are cycling on and off, but not in the
correct order.
Solution: Check the AC power plugs from the motors (are
they securely plugged into the correct outlet?)
Problem: Coal feeder motor will not turn on.
Solution: Check if the red light is lit, if not, check if the feeder
motor switch is turned on.
Problem: The motors turn on and off as programmed, but
the water temperature is below the thermostat setting.
Solution: Check the connections from the stoker control to
the aquastat.