Harman VF3000 manual 22Troubleshooting, Feeding Problems, Stoker Control Troubleshooting

Models: VF3000

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22Troubleshooting

Feeding Problems

Gas Odor 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 de- signed 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.

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. How- ever, 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.

Stoker Control Troubleshooting

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 mo- tors 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?”

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.

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Harman VF3000 manual 22Troubleshooting, Feeding Problems, Stoker Control Troubleshooting