44-00-0297
SHERLOCK
102/202 REV. 4.1 05-02-15
45
TROUBLE SHOOTING
SHERLOCK
INFRARED GAS SPECIFIC REFRIGERANT GAS SENSOR
Please See Infrared Sensor manual 44-0295 for more information.
LED L1
- LED L1 will indicate if the sensor microprocessor is operating and if the sensor is in test mode using dip switch 5 or
pushbutton 1. When the microprocessor goes through start-up, it will turn on L1 and keep it on unless the microprocessor detects a
failure of any of the sensor components .
LED L2
-
LED L2 is used for calibration of the sensor and is normally off. When the Push Button Calibration is done, L2 will turn
on in about 8 seconds then turn off when Push button is released.
LED Status
Condition
L1 On Steady
Sensor is operating properly.
L1 Off
Sensor is not powered up.
L1 on Flashing
Switch 5 is on and there is a 200 ppm
reading on the sensor
Microprocessor detects error in the
sensor signal.
L2 Off
Sensor is operating properly.
L2 On Flashing
Microprocessor Failure
L2 On Steady
Sensor is on factory calibration setting
Sensor Reading
Sensor reading shows the presence of
gas
Sensor output indicates a full scale
reading
Solution
Sensor is working within acceptable limits
Check power connector. Ensure that the sensor is being pow-
ered by 12 Volts DC. Ensure that wire connections are secure
and are correct polarity.
Microprocessor detects an error in the sensor hardware or
Microprocessor Failure.
Call Genesis Customer Service
Switch Dip Switch SW5 to other position.
If switching SW5 does not work, call Genesis Customer Ser-
vice
Sensor is working within acceptable limits
Call Genesis Customer Service. Check start up date on the
sensor cover
Turn Dip Switch 6 off and wait at least 1 minute for L2 to turn
off and do Push Button calibration again.
Make sure Dip Switches are set to off position. If on, Switch 5
will show approximatley 200 ppm, Switch 7 will read 250 ppm
plus the original sensor reading. Check area around sensor with
a hand held leak detector for refrigerant. If no leak, was the
calibration procedure followed. Attempt calibration procedure.
Move sensor to another location or, if possible, 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.
Check for wiring problems. Turn Dip Switch 5 to on. If the con-
trol reads about 200 there could be a sensor problem and contact
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.
MAINTENANCE SCHEDULE
It is recommended that infrared sensors are zero calibrated every 6 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, this could void the warranty. These sensors can last an average of 5 to 7 years if the maintenance schedule is
followed.
Most of the time push button calibration and control calibration is all that is needed to re zero the sensor and keep it from false
alarming. See step 4 of quick start in the infrared sensor manual for more. Measured gas calibration should only be necessary for
testing accuracy and if the sensor fails to pick up a leak and is suspected of being damaged or faulty. If a sensor is placed in a multi-
use room where different temperatures will be used depending upon the product stored, it may be necessary to re-zero the sensor
when the proper product temperature has been achieved.
Summary of Contents for SHERLOCK 102
Page 3: ...44 00 0297 SHERLOCK102 202 REV 4 1 05 02 15 4 THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 11: ...44 00 0297 SHERLOCK102 202 REV 4 1 05 02 15 12 IR SENSOR ...
Page 49: ...44 00 0297 SHERLOCK102 202 REV 4 1 05 02 15 50 PAGE FOR FIELD WIRING SHERLOCK SYSTEM ...
Page 51: ...44 00 0297 SHERLOCK102 202 REV 4 1 05 02 15 52 THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 53: ......