44-00-0297 SHERLOCK102/202 REV. 4.1 05-02-1546
Amber Light Status
Off
ON Steady
ON Flashing
Red LED Status
Off
ON Steady
ON Flashing
Sensor Reading
Sensor reading shows the pres-
ence of gas
Sensor output indicates a full
scale reading
Sensor output indicates a
System Fault
Sensor output indicates an
“open circuit”
Sensor output indicates a “short
circuit”
Solution
Sensor is not powered up Check power. Ensure that the sensor is being powered by 12V DC.
Call Genesis Customer Service.
Sensor is powered up. Sensor is operating properly.
Sensor element needs to be replaced. The sensor will start fl ashing 40 days before the sensor
goes bad. After 40 days the sensor will stop sending a signal to the Sherlock unit and a
“SENSOR OPEN” will show on the display.
Solution
Sensor is not powered up Check power. Ensure that the sensor is being powered by 12V DC.
Call Genesis Customer Service.
Sensor Fault. Call Genesis Customer Service.
Sensor is powered up. Sensor is operating properly.
Solution
Check space with a hand held leak detector for a leak. If no leak, follow the zero calibration
instructions. Next move the sensor to another location or swap positions with another sensor. If
readings “move” with the sensor, call Genesis Service.
If readings “stay” at original location, check for wiring problems or the presence of gas. Double
check signal wire connection.
Is ABS in Sherlock control's Calibration menu reading -36? Sensor element needs to be replaced.
If the sensor is new follow the calibration procedure and press the reset button inside the sensor
Check for wiring problems.
Check wiring. Check for continuity wiring problems. Sensor Element may have malfunctioned.
Call Genesis Customer Service.
SHERLOCK ELECTRO-CHEMICAL AMMONIA REFRIGERANT SENSOR
Please See Electro-Chemical Sensor manual 44-0377 for more information.
External Amber Light and Internal Red LED Status and Trouble Shooting
MAINTENANCE SCHEDULE
It is recommended that Electro-Chemical sensors are zero calibrated every 12 months to insure accuracy. To aid in performing the
maintenance schedule, remember to write down the sensor start up date on the front of the sensor. If it is not written down and a
problem due to calibration occurs, the Genesis technician may not be able to help and this could void the warranty. These sensors
can last an average of 24 months before replacing the sensor element if the maintenance schedule is followed.
Most of the time push button restart of a new sensor and control calibration is all that is needed to re zero the sensor and keep it
from false alarming. Measured gas calibration is necessary for testing the accuracy of the sensor and if the sensor fails to pick up
a leak or is suspected of being damaged or faulty. Measured gas calibration should also be done when changing out a new sensor
element. WARNING: Use only recommended concentrations of Ammonia. Undiluted or Pure Ammonia sprayed directly on
the sensor can damage the sensor element.
TROUBLE SHOOTING
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