Model: LD3
Dual Mode Refrigerant
Gas Leak Detector
ROBINAIR.COM 800.533.6127
Operating Instructions
(original instructions)
(en-US)
Introduction ......................................3
Features .........................................3
LD3 Control Panel ................................4
Operating Instructions ............................4
Adjusting Sensitivity Levels .......................5
Leak Test Vial ....................................5
Maintenance .....................................6
Product Specications ............................7
EN14624/2005 Test Specications ................7
Product Application Ambient ......................7
Cross Sensitivity to Automotive Chemicals .........8
Replacement Parts ...............................8
Product Cleaning Instructions .....................9
Return for Repair Policy & Warranty Policy .........9
Contents
LD3 OPERATORS MANUAL
PAGE 2
© Bosch Automotive Service Solutions Inc. / Robinair / October 2020
Introduction
The LD3 features a long life solid electrolyte semiconductor sensor
technology that is designed to detect all CFC, HCFC, HFC, and HFO
refrigerants including R-1234YF (HFO), R-134A (HFC), R-410A (HFC),
R-22 (HCFC), R-407C (HFC), R-507 (HFC), R-12 (CFC), R-404C (HFC).
The LD3 is designed to detect all SNAP approved refrigerant blends.
The LD3 does not require rechargeable batteries.
Features
Long life, stable sensor
R1234yf sensitivity .015 oz/yr
R134a sensitivity .05 oz/yr
Certied to SAE J2791, J2913, ASHRAE 173-2012, EN14624-2012
Automatic calibration and reset to ambient
3 adjustable sensitivity levels
Low battery indicator
True mechanical pump
Uses 4 AA alkaline batteries
CE Certied
Comfortable Santoprene handle grip
2-year warranty includes sensor
LD3 OPERATORS MANUAL
PAGE 3
© Bosch Automotive Service Solutions Inc. / Robinair / October 2020
LD3 Control Panel
Operating Instructions
1. Turn On: Press the ON/OFF button once to turn on and again to turn off.
NOTE: For SAE J2913 sensitivity setting for R1234yf Mode hold down
ON/OFF button until is the LED turns displays red.
2. Warm Up: The detector automatically starts heating the sensor. During
the heating cycle the detector will sound a slow “beep” and the LED will
alternate colors; green, red, yellow. The warm up cycle is complete when
the audio beep increases in frequency and the LED turns to constant green
(the default sensitivity level). Warm up is usually less than 20 seconds.
3. Search: Move the probe tip towards a suspected refrigerant leak at the
rate of less than 2 inches (~50 mm) per second, no more than 1/4 inch
(~5 mm) away from the suspected source.
4. Detection: If a leak exists, the sound will increase in rate and pitch.
NOTE: The leak detector responds to changes in refrigerant concentra-
tion. When detection occurs, move the probe away from the source and
back again to conrm the leak source. The detector alarm will reset if the
probe is held xed at the source (see Automatic Calibration Feature).
Sensitivity Level Indicator
Green = MED (default)
RED = HI, Amber = LO Low
Battery indicator when
ashing RED
ON/OFF Switch
Hold down to change
Sensitivity when detector
is on.
LD3 OPERATORS MANUAL
PAGE 4
© Bosch Automotive Service Solutions Inc. / Robinair / October 2020
Adjusting Sensitivity Levels
In addition to the automatic calibration, the audio alarm trigger level can
be set by the user to 3 different sensitivity levels- LO (Yellow), MED (Green),
HI (Red). If the detector is continuously alerting while pulled away from
the suspected area of the leak, the sensitivity level can be adjusted so the
detector will only alert when the sensor is close to the source of the leak.
The Leak Detector will default to the MED (Green) sensitivity level
automatically once the unit comes out of the warm up cycle. To change
sensitivity levels when the detector is on, press and hold the ON/OFF
button down for several seconds. The indicator LED at the top of the
keypad will scroll changing colors; Green for MED, Red for HI and Yellow for
LO. Release the button when the desired sensitivity level is displayed.
Leak Test Vial
The leak detector comes with a Leak Test Vial that allows the user to
verify the detector is performing properly. Check the expiration date on
the vial before testing the leak detector.
To test:
1. Remove the colored label dot on the center of the screw cap to ex-
pose the vent hole. (see g. below)
2. Turn on the detector and allow the unit to complete the warm up cycle.
Set sensitivity level to HIGH.
3. Place the sensor close to the hole in the Leak Test Vial. The beep rate
should increase indicating that the sensor and electronics are working
properly.
NOTE: The leak detector responds to changes in refrigerant concentra-
tion. When detection occurs, move the probe away from the source and
back again to conrm the leak source. The detector alarm will reset if
the probe is held xed at the source (see Automatic Calibration Feature).
Leak Test VialExpiration Date on Label
Remove label dot over
vent hole before testing.
Vial Cap with Vent Hole
LD3 OPERATORS MANUAL
PAGE 5
© Bosch Automotive Service Solutions Inc. / Robinair / October 2020
MAINTENANCE
WARNING: RISK OF FIRE OR EXPLOSION -
Use AA alkaline batteries only in this product. Using the wrong type of
battery could result in a re or explosion.
Install Batteries: Unscrew the battery cover located at the base of the unit
as shown. Install four AA alkaline batteries into the battery
compartment in the same direction. Note the polarity mark
on the inside of the battery compartment for proper battery
orientation. Replace batteries when the LED Indicator display
ashes RED.
Sensor & Sensor Filter
Replace Filter: Unscrew sensor tip as shown to replace lter. Replace lter
when it becomes visible dirty or after 30 hours of usage.
Replace Sensor: Remove sensor by pulling it out of the socket. Install the
new sensor by aligning the Keyway notch in the sensor cover with the raised
keyway on the sensor socket holder (see gure below).
Note: Do not force sensor into socket. Misalignment can damage the sensor
pins.
Important: The instrument’s software is designed to alert the user if the sensor is dislodged
or defective. If the sensor is not fully inserted into the six-pin socket, or if it is defective, the
instrument will not come out of the “Warm Up” mode for proper operation when the power
button is turned on. Additionally, if the instrument becomes unstable during its operation,
it is an indication that the sensor may be defective.
Note: If the leak detector has been out of use for an extended period, weeks or months, the
following action is recommended. Power on the instrument and allow it to come out of warm
up, and then run it with the sensitivity level in the (Hi) high position for several minutes before
testing it with the Leak Test Vial. This action will guarantee that the sensor is fully conditioned
for maximum response to refrigerant gas.
Unscrew tip to
replace lter.
Keyway
Alignment
Filter
Push straight on (do not twist) TO INSTALL sensor.
Pull straight out (do not twist) TO REMOVE sensor.
LD3 OPERATORS MANUAL
PAGE 6
© Bosch Automotive Service Solutions Inc. / Robinair / October 2020
Product Specications
Model No. LD3
Name Leak Detector, Refrigerant Gas
Sensitivity .05 oz/yr R134a, .0123 oz/yr R1234yf
Sensor Life > 10 years
Response Time Instantaneous
Power Supply 4 AA Alkaline batteries
Battery Life 4 hours continuous
Warm up time < 20 seconds
Probe Length 17 inches
Weight, lbs 1.5 lbs
Warranty 2 years (includes sensor)
EN14624/2005 Test Specications
Minimum/Maximum 1 gm/yr minimum, >50 gm/yr
Sensitivity Threshold (fixed) maximum
Minimum/Maximum 3 gm/yr minimum, >50 gm/yr
Sensitivity Threshold (moving) maximum
Minimum Detection Time Approx. 1 second
(1gm/yr)
Clearing Time Approx. 9 seconds after exposure
to >50 gm/yr
Minimum Threshold after 1 gm/yr
Maximum Exposure
Sensitivity Threshold in 1 gm/yr
Polluted Atmosphere
Calibration Frequency 1/yr check with calibrated leak
standard
Product Application Ambient
• Indoor/Outdoor Use
• Temperature Range: -24—125°F (-31—52°C)
• Humidity Range: <95% Non-Condensing
• Altitude: <10,000 ft.
• Pollution Degree 4
• Protection Grade: IP51
LD3 OPERATORS MANUAL
PAGE 7
© Bosch Automotive Service Solutions Inc. / Robinair / October 2020
Cross Sensitivity to Automotive Chemicals
Some automotive solvents and chemicals have similar hydrocarbon prop-
erties as R134a and may elicit a positive response. Before leak checking,
clean up any chemicals in the list below that elicit a positive response.
Chemical Name/Brand Response
Rain-X Windshield Wash Fluid Y
Ford Spot Remover (wet) Y
Ford Rust Inhibitor Y
Ford Gasket Adhesive (wet) Y
Loctite Natural Blue Degreaser (diluted) Y
Ford Brake Parts Cleaner Y
Ford Silicone Rubber (uncured) N
Motorcraft Antifreeze heated to 160 degrees F N (partial)
Gunk Liquid Wrench Y
Ford Silicone Lubricant N
Ford Pumice Lotion (with solvent) Y
Ford Motorcraft Brake Fluid Y
Ford Carburetor Cleaner Y
Dextron Transmission Fluid heated to 160 degrees F N
Quaker State Motor Oil heated to 160 degrees F N
Replacement Parts
Item Part Number
Sensor with Filter SP01957183
Sensor Filters (5 pack) SP01964946
Leak Test Vial SP01964945
Sensor Tip SP01964944
Parts Kit (includes sensor, test vial & lter kit) SP01957182
Carrying Case SP01957181
LD3 OPERATORS MANUAL
PAGE 8
© Bosch Automotive Service Solutions Inc. / Robinair / October 2020
Product Cleaning Instructions
Remove surface dust by wiping with a dry cloth.
Return for Repair Policy & Warranty Policy
Every effort has been made to provide reliable, superior quality products.
However, in the event your instrument requires repair, call the Robinair
Technical Hotline below for instructions.
Robinair warrants the LD3 Refrigerant Gas Leak Detector to be free of
defects in materials and workmanship for a period of two years from
the date of purchase. Robinair shall, at its option, repair or replace, at no
charge, such products which, under normal conditions of use and service,
prove to be defective in material and/or workmanship. This warranty
applies to all repairable instruments that have not been tampered with or
damaged through improper use including unauthorized opening of the
unit. Please ship warranty units that require repair freight prepaid to Ser-
vice Center along with proof of purchase, return address, phone number
and/or email address.
Robinair shall not be liable for any incidental, consequential, special or
punitive damages arising from the sale or use of any products, whether
such claim is in contract or not. No attempt to alter, modify or amend this
warranty shall be effective unless authorized in writing by an ocer of
Robinair.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES OR REP-
RESENTATIONS, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY
IMPLIED BY LAW, WHETHER FOR MERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE OR OTHERWISE AND SHALL BE EFFECTIVE
ONLY FOR THE PERIOD THAT THIS EXPRESS WARRANTY IS EFFECTIVE.
SOME STATES AND JURISDICTIONS DO NOT ALLOW LIMITATIONS ON
IMPLIED WARRANTIES, SO THE ABOVE LIMITATIONS MAY NOT APPLY
TO YOU.
Tech Services: 800-822-5561
LD3 OPERATORS MANUAL
PAGE 9
© Bosch Automotive Service Solutions Inc. / Robinair / October 2020
NOTES
LD3 OPERATORS MANUAL
PAGE 10
© Bosch Automotive Service Solutions Inc. / Robinair / October 2020
NOTES
LD3 OPERATORS MANUAL
PAGE 11
© Bosch Automotive Service Solutions Inc. / Robinair / October 2020
655 Eisenhower Drive
Owatonna, MN 55060 USA
Technical Services: 1-800-822-5561
Fax: 1-866-259-1241
Customer Service: 1-800-533-6127
Fax: 1-800-322-2890
www.robinair.com
581644 REV F
© Bosch Automotive Service Solutions Inc.
