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2. VAPOR ALARM IS ACTIVATED ALL THE TIME Possible causes and remedies: a. Vapor present in the monitoring well. Remove the sensor from the monitoring well, if the alarm stops, then it indicates the presence of a vapor. IV.3. TROUBLESHOOTING (continued) b. The alarm set point is too sensitive. If the vapor alarm continues when the probe Following listings are the possible problems, causes and recommended remedies: 1. ALL GREEN POWER LED's OFF Possible causes and remedies: C. Vapor sensor failure. If the vapor sensor continues even after the sensor is a. Power switch not turned on, make sure the power switch is turned to the ON position. from the safety barrier ZSB-2 terminal no.6; if the alarm stops, this indicates the b. AC power is connected improperly. Refer to section //1.8. POWER INPUT WIRING, the 115 VAC line, neutral and ground must be wired to the correct ter- minals marked. C. Fuse is blown, check the fuse continuity and replace if needed. Replacement fuse must be 2 amp 115 VAC or equivalent. 2. VAPOR ALARM IS ACTIVATED ALL THE TIME Possible causes and remedies: a. Vapor present in the monitoring well. Remove the sensor from the monitoring well, if the alarm stops, then it indicates the presence of a vapor. b. The alarm set point is too sensitive. If the vapor alarm continues when the probe is removed from the well, then adjust the set point trimpot counter -clockwise until the alarm stops. (See section IV2.2. VAPOR ALARM ADJUSTMENTS page 27.) C. Vapor sensor failure. If the vapor sensor continues even after the sensor is removed from the monitoring well, and even after the sensorset point trimpot has been turned counter -clockwise a// the way, disconnect the white sensor wire from the safety barrier ZSB-2 terminal no.6; if the alarm stops, this indicates the presents of a short circuit in the sensor. 28