44-00-0297 SHERLOCK102/202 REV. 4.1 05-02-1544
TROUBLE SHOOTING
SHERLOCK CMOS (SOLID STATE) REFRIGERANT GAS SENSOR
Please See CMOS Sensor manual 44-0283 for more information.
LED L1 - LED L1 will indicate whether the sensor is powered up and if the internal circuitry is operating properly. The LED is
color coded. Red is for CFC/HCFC gases. Green is for HFC gases. Amber is for Ammonia (NH3).
LED Status
Off
ON Steady
Sensor Reading
Sensor reading shows
the presence of gas
Sensor output indicates
a full scale reading
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 AC or
DC.
Call Genesis Customer Service if LED is still off.
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.
Check for wiring problems, jumpers not properly set.
Check wiring. Sensor Element may have malfunctioned. Call Genesis Customer Service
Check for continuity wiring problems.
MAINTENANCE SCHEDULE
The Solid State CMOS sensor should last 3 to 5 years under normal conditions. Extreme temperatures, or exposure to to refriger-
ants or othe gases will severely decrease the sensors life expectancy. To insure a reading as accurate as possible, these sensors need
to be zero calibrated every 6 months. It is strongly recommended to follow the zero calibration instructions on page 6 to rezero the
sensors. Measured gas calibration testing should only be necessary for double checking accuracy and testing to see if the sensor is
working properly.
Genesis customer service. If it still reads full scale double check for proper wiring. How old is the sensor? Check start up date on
the sensor cover.
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