Enviro EF3 owner manual Potentiometer Readings, Troubleshooting

Troubleshooting

●To test the exhaust vacuum, place a magnehelic gauge in the sensor end of the vacuum tube. It should read 0.5” W.C. If the reading is good, replace the vacuum sensor.

●If none of the below work contact your local dealer for service.

Circuit Board

□Check the fuses on the circuit board (see “Troubleshooting - Fuses”). Timer Control:

◊ Make sure the dial-a-fire is turned on.

◊Unplug the stove and open the side and back panels. Check all the connections to the auger motor, auger dial-a-fire, vacuum sensor, 200°F (93°C) temperature sensor and the timing control module against the wiring diagram in this manual.

◊Check the voltage across the load pins of the timing module. It should be around 1 V to 2 V, cycling to line voltage during an auger pulse. If not, replace the timing control module.

◊If the auger motor still does not work, then attempt to by-pass the auger dial-a-fire control by removing the leads from the timing control module’s second delay pins and placing a jumper across the pins. If the auger now cycles very quickly, test the dial-a-fire potentiometer. If the auger did not cycle, replace the timing control module.

◊To test the dial-a-fire potentiometer, the potentiometer should have a range of 68KΩ to approximately 850 KΩ (± 10%). If the range is not close, replace the potentiometer.

7. Control settings (Heat Level) have no effect on the fire (Circuit Board Only).

□If the system light is flashing, the Control Board has complete control of the unit. When the unit’s system light becomes solid, then control of the unit is given back to the operator.

□If there is no control of the Heat Level button, make sure the thermostat is calling for heat.

□Call your local dealer for service.

8.The dial-a-fire has no effect on the fire (Timer Control Only).

◊ Make sure all connections to the timer control module are secure.

◊Perform a resistance test to the dial-a-fire potentiometer by placing the two (2) test leads from a multimeter into the leads of the potentiometer. The potentiometer should have a range of 68KΩ to approximately 850 KΩ (± 10%).

Potentiometer Readings:

Full counter-clockwise (switched off) = open circuit, overload or infinite resistance

Low fire	800 KΩ to 900 KΩ
High fire	68 KΩ to 82 KΩ

If the range is not close or does not vary then replace the potentiometer.

9.The 200°F (93°C) high limit temperature sensor has tripped.

General:

●Reset the sensor and determine the cause - was it convection blower or 160°F (71°C) temperature sensor failure? Bypass the 160°F (71°C) sensor. Does the convection blower come on high? If no, replace the blower.

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