Model: LD7
Dual Mode Refrigerant
Gas Leak Detector
Operating Instructions
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Introduction ...................................... 3
Features ......................................... 3
LD7 Control Panel ................................ 4
Operating Instructions ............................ 4
UV & Inspection Light Operation ................... 5
Leak Size Indicator ............................... 6
Sweep (Pinpoint ) Mode ........................... 6
Automatic and Manual Calibration ................. 7
Adjusting Sensitivity Levels ....................... 7
Audio Mute Function .............................. 8
Leak Test Vial .................................... 8
Maintenance ..................................... 9
User Interface Displays .......................... 10
Product Specications ........................... 11
EN14624/2005 Test Specications ............... 11
Cross Sensitivity to Automotive Chemicals ........ 12
Replacement Parts .............................. 12
Return For Repair Policy/Warranty Policy .......... 13
Contents
LD7 OPERATORS MANUAL
PAGE 2
© Bosch Automotive Service Solutions Inc. / Robinair / November 2017
Introduction
The LD7 features a patented 3 LED UV light that emits the optimum
wavelength for A/C dye uorescence. The UV light can be used simultaneously with the solid electrolyte sensor or independently. The LD7 does
not require rechargeable batteries.
The LD7 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 LD7 is designed to detect all SNAP approved refrigerant blends.
The LD7’s unique graphic color LCD display and sweep mode function
conveys messages, graphics and prompts giving the A/C technician
real-time information to help locate the source of the leak and ensure the
leak detector is always at optimal performance. The LED inspection light
aids the technician to locate and inspect suspected leak sources.
Features
Patented 3 LED UV lights with 395-415 nm wavelength is optimum for
A/C dye uorescence
Unique color graphic LCD display
Long life, stable sensor
R1234yf sensitivity .015 oz/yr
R134a sensitivity .05 oz/yr
Certied to SAE J2791, J2913, ASHRAE 173-2012, EN14624-2012
Sweep mode function to pinpoint leak source
Automatic calibration and reset to ambient
User friendly message and error screens
Hi intensity LED inspection light
3 sensitivity levels
Low battery indicator
True mechanical pump
Audio mute function
Uses 4 AA alkaline batteries
CE Certied
Comfortable Santoprene handle grip
2-year warranty includes sensor
Made in USA
LD7 OPERATORS MANUAL
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© Bosch Automotive Service Solutions Inc. / Robinair / November 2017
LD7 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 hold down ON/OFF button until
R1234yf Mode is displayed.
2. Warm Up: The detector automatically starts heating the sensor.
During the heating cycle, the LCD display will display the mes-
sage “WARM UP- PLEASE WAIT” with a progress bar (see gure).
Warm up is usually less than 20 seconds.
3. Search: The display will show the “READY” momentarily and then
“SEARCH” when searching for leaks can begin. The audio “beep”
will begin to sound. 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
and the display will show the numerical indication of the leak size.
NOTE: The leak detector responds to changes in refrigerant concentration.
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).
Color Graphic LCD Display with
messages and graphics
Audio Mute
Sweep (Real-Time) Pinpoint Mode
UV or white inspection light
Sensitivity Level Indicators
LD7 OPERATORS MANUAL
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© Bosch Automotive Service Solutions Inc. / Robinair / November 2017
UV Light & Inspection Light Operation
Before leak checking with the UV light:
a. Make sure the A/C system is properly charged with sufcient dye.
(See manufacturer’s specications for proper dye charge.)
b. Run the A/C system long enough to thoroughly mix and circulate the dye with
the refrigerant and lubricating oil.
1. Turn on UV light by pressing the LED button once. (See control panel on page 4).
3 UV LED’s will turn on (see image below).
2. Holding the leak detector approximately 10” to 14” away, shine the UV light
beam slowly over the components, hoses, and metal lines that make up the
A/C system.
3. When the UV light shines on the uorescent dye that has escaped from the
system, the dye will glow a bright yellow green.
3 UV LED’s
2 White Inspection LED’s
•
This UV (ultraviolet) LED during operation radiates UV light.
•
Avoid direct eye and skin exposure to UV light.
•
If viewing the UV light is necessary, please use UV ltered
glasses to avoid damage by the UV light.
CAUTION: EMITS ULTRAVIOLET RADIATION
1. Turn on Inspection light by pressing the LED light button until the white LED’s
turn on. (See control panel on page 4)
2. Inspect all A/C ttings, hoses and components for excessive wear or damage.
Auto Shut-off
The UV Light and Inspection Lights will automatically shut off after 5 minutes.
This will ensure proper battery life in case the LED lights are left on inadvertently
LD7 OPERATORS MANUAL
PAGE 5
© Bosch Automotive Service Solutions Inc. / Robinair / November 2017
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