Robinair LD7 Premium Refrigerant Leak Detector User Manual

Model: LD7

Dual Mode Refrigerant

Gas Leak Detector

Operating Instructions

(original instructions)

ROBINAIR.COM 800.533.6127

(en-US)

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 .....................................8

User Interface Displays ......................... 10

Product Specications .......................... 11

EN14624/2005 Test Specications .............. 11

Product Application Ambient .................... 11

Cross Sensitivity to Automotive Chemicals ....... 12

Replacement Parts ............................. 12

Product Cleaning Instructions ................... 13

Return For Repair Policy/Warranty Policy ........ 13

Contents

LD7 OPERATORS MANUAL

PAGE 2

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 simulta-

neously 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

Certied 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 Certied

Comfortable Santoprene handle grip

2-year warranty includes sensor

LD7 OPERATORS MANUAL

PAGE 3

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 suspect-

ed 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 concentra-

tion. When detection occurs, move the probe away from the source and

back again to conrm 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

PAGE 4

UV Light & Inspection Light Operation

Before leak checking with the UV light:

a. Make sure the A/C system is properly charged with sucient dye.

(See manufacturer’s specications 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

Leak Size

Indicator

The LCD bar-graph leak size indicator remains off normally but once a

leak is detected, a number of bars will be displayed. The number will

continue to increase or decrease depending on the amount of refrigerant

sensed. The display will be the same for all HFC and HCFC refrigerants

regardless of the sensitivity setting.

The maximum value will be displayed once the leak source has been

located. The table below can be used to approximate the size of leak:

Sweep

(Pinpoint) Mode

This mode allows the user to “zero in” or pinpoint hard to nd small

leaks.

Similar to an oscilloscope trace “sweeping” across the display, the dis-

play “cursor” will sweep across the display from left to right tracking a

horizontal baseline over a 3 second period.

When no leak is sensed, the baseline trace will be at. While searching,

if refrigerant gas is sensed, the horizontal trace on the display will rise up

and continue to rise as the leak source is approached. If the user moves

away from the leak source, the trace will drop back down.

Because the display in this mode is based on a time period, the previous

leak level sensed will be displayed helping the user to determine where

the maximum level of gas is present- thereby pinpointing the source of

the leak.

Note: The sensitivity level in the Sweep Mode will default to HI.

Maximum No. Bars Displayed Leak Size (oz/yr)

1-2 (green color) < 0.1

3-5 (yellow color) 0.1 to 0.5

6-10 (red color) > 0.5

LD7 OPERATORS MANUAL

PAGE 6

Automatic and Manual Calibration

To allow the user to nd the leak source easily, the detector will calibrate

itself either automatically (default) or manually to the ambient and reset

the alarm as soon as there is detection.

In Automatic mode, the detector will automatically reset the alarm. In

Manual mode, the detector will continue to alarm if gas is detected until

the user presses the SENS button to reset the alarm. Both modes allow

the user to get closer to the leak source without the detector continually

alarming. In Automatic mode, once the source of the leak is found, the

detector will not alarm again until the probe is moved away from the

source and back again. In Manual mode, once the source of the leak is

found, the detector will continue to alarm at the source until the SENS

button is pressed.

To use the detector in Manual Calibration mode: Press and hold the SENS

Selector and release when the AUTO icon is replaced with MANUAL on

the display. To return to Automatic Calibration, press and hold the SENS

button; and do not release until the AUTO icon is displayed.

Note: The sensitivity levels can only be changed in Automatic

Calibration mode. To change sensitivity levels while in Manual

mode, return to Automatic mode, select the desired level and

return back to Manual mode.

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, MED, HI). If the de-

tector 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 sensitivity level automatically

once the unit comes out of the warm up cycle. To change sensitivity lev-

els, press the SENS once for HI sensitivity and again for LO sensitivity.

LD7 OPERATORS MANUAL

PAGE 7

Audio Mute Function

To silence or mute the audio beep and alarm signal, press the MUTE button.

To restore the audio sound, press the MUTE button again. (Note: a few

seconds is required to restore sound if the mute button is pressed in rapid

succession.)

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 expose

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 the Leak Test Vial. The beep

rate should increase and the Leak Size Indicator should display 3-6 bars

indicating that the sensor and electronics are working properly.

NOTE: The leak detector responds to changes in refrigerant concentration.

When detection occurs, move the probe away from the source and back

again to conrm 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

MAINTENANCE

Batteries

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.

LD7 OPERATORS MANUAL

PAGE 8

MAINTENANCE (Batteries - continued)

Install Batteries: Unscrew battery cover located at the base

of the unit as shown. Install four AA alkaline batteries into the

battery compartment in the direction as shown noting the

polarity mark on the inside of the battery compartment for

correct battery orientation.

Replace batteries when the display shows

the message REPLACE BATTERIES.

Sensor & Sensor Filter

Replace Filter: Unscrew sensor tip as shown to replace lter. Re-

place lter when it becomes visible dirty or when the display shows

“REPLACE SENSOR FILTER.” The LD7 will keep track of the number

of hours of usage and advise the user when it is time to replace it.

Replace Sensor: Remove sensor by pulling out of socket. Install the

new sensor by aligning the keyway notch in sensor cover with the

raised keyway on 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. In this case, the message screen as shown on the right will be displayed.

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.

LD7 OPERATORS MANUAL

PAGE 9

Sensor Clearing Message

Note: Sensor Clearing Message is displayed when sensor be-

comes saturated with a very large concentration of gas during

which time the sensor will not function optimally. Recovery is

normally less than 10 seconds.

Replace Sensor Filter Message

Note: Replace Sensor Filter Message is displayed when the

detector’s timer registers approximately 30 hours of accumulated

use. Press the appropriate button when prompted “DONE” or

“LATER” on the display. If “DONE” is selected, the detector will

reset to zero hours. If “LATER” is selected the detector will continue to

prompt the user to replace the lter after each subsequent use until “DONE”

is selected.

User Interface Displays

Power on; unit

displays logo

and model for 3

seconds

No Sound

Warm up

Normal beep rate

Unit is ready

after 20 seconds

Unit begins Searching

“SEARCH” and 1st bar blink

Default is MED and AUTO

Rapid beep rate (alarm)

when leak is detected

Press to change

sensitivity level

LO MED Hi

Hold down

to change

Auto/Manual

Press once to

MUTE

Press again to

UNMUTE

Shows raw signal from sensor

Unit stays in HI and Man Mode

Unit is muted

MESSAGE SCREENS

Detection

Press for

LEAK LOCATION

Mode

LED

Press once for

UV LED

LED

Press twice for

Inspection LED

LD7 OPERATORS MANUAL

PAGE 10

Product Specications

EN14624/2005 Test Specications

Model No. LD7

Name Leak Detector, Refrigerant Gas

Sensitivity .05 oz/yr R134a, .0123 oz/yr R1234yf

UV Mode 3 UV LED’s

UV Wave-length 395-415 nanometers

Sensor Life > 10 years

Response Time Instantaneous

Power Supply 4 AA Alkaline batteries

Battery Life 4 hours continuous

Warm up time < 20 seconds

Alarm Near Sensor Visual probe LED

LCD Display 128 X 160 full color graphic display

Probe Length 17 inches

Weight, lbs 1.5 lbs

Warranty 2 years (includes sensor)

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

LD7 OPERATORS MANUAL

PAGE 11

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.

Replacement Parts

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

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

LD7 OPERATORS MANUAL

PAGE 12

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 LD7 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 ocer 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

LD7 OPERATORS MANUAL

PAGE 13

NOTES

LD7 OPERATORS MANUAL

PAGE 14

NOTES

LD7 OPERATORS MANUAL

PAGE 15

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

581638 REV F

Robinair LD7 Premium Refrigerant Leak Detector

Product's Documents

LD7 Operating Instructions English

Specifications

Robinair LD7 Questions and Answers