Hilmor LDHD250 Guida alla risoluzione dei problemi

Model

LDHD250

Heated Diode Refrigerant

Leak Detector

Operation and Maintenance Instructions

TABLE OF CONTENTS

Introduction ......................................................................................................... 3

Key Features........................................................................................................ 4

Safety ..................................................................................................................... 5

Leak Detector Components........................................................................... 6

Features ............................................................................................................ 7-8

Operating Instructions............................................................................... 9-10

Technical Speciﬁcations .................................................................................11

INTRODUCTION

The hilmor Heated Diode Leak Detector oers the greatest sensitivity

and fastest response of any portable refrigerant detector available. This

is achieved through the use of a highly sensitive semi-conductive sensor

combined with a sophisticated microprocessor-controlled circuit. In

addition to the superior performance and functional advantages, it oers

a uniquely designed ergonomic shape to provide greater ease of use and

comfort.

WARNING:

It is important to read the entire instruction manual carefully in order

to gain a complete understanding of the tool's features, limitations

and speciﬁcations before use. hilmor products are designed and

manufactured to be used by trained and licensed HVAC/R technicians.

Incorrect application could result in accidents, injuries or death. Refer to

page 5 for safety warnings.

KEY FEATURES

ADDED CONVENIENCE

•Audible and visual notiﬁcation for leak detection.

EASY TO READ

•LED screen for easy to read display.

ADDED VERSATILITY

•Works on all halogenated refrigerants.

SMALL SPACE CAPABLE

• Flexible probe allows access to the hard-to-reach areas.

SAFETY

SAFETY PRECAUTIONS

To prevent personal injury, please read the operating manual carefully and

operate only as instructed by following the guidelines listed below.

1. Wear safety glasses, gloves and all other recommended safety gear

when working with refrigerants. Contact with refrigerants may cause

injury. Please see any warnings associated with refrigerants.

2. Avoid the inhalation of refrigerant. High concentrations of refrigerants are

harmful to humans and can cause serious injury.

3. Do not allow probe to come in contact with electrically charged objects

or high voltage.

4. Before each use, make sure the probe tip is clean. Do not allow any

liquids to enter the probe tip; doing so will damage the unit.

Audio Mute Indicator

Sensor Indicator

Battery Voltage Indicator

Display During Warm Up

Real Time Detection Indicator

Gas Flow Indicator

Sensor Error Indicator

ON/OFF Button

SENS Button

RESET Button

MUTE Button

Panel Display

Sensor (Inside Probe Tip)

Flexible Probe

LEAK DETECTOR

COMPONENTS

FIG. 1

FIG. 2

FUNCTIONS AND FEATURES

The product is easy to operate and simpliﬁes the user interface. Please

refer to FIG. 1 to familiarize yourself with the indicators and keypad

controls as you proceed through this section.

BATTERY VOLTAGE INDICATOR

The Battery Voltage Indicator allows the user to see the battery

level. If the indicator is o, the batteries are in full power; If the indicator

is on, the batteries have enough voltage for operation; If the indicator is

ﬂashing rapidly, replace the batteries.

AUTOMATIC CIRCUIT/RESET FEATURE

Upon initial power-on and completion of the warm-up, the unit automatically

sets itself (automatic circuit) to ignore the level of refrigerant present at

the tip. Only a reading greater than this level will cause a notiﬁcation.

NOTE: Since this feature causes the unit to ignore any refrigerant

present at the sensor tip after warm-up is complete, the unit should be

powered on and allowed to warm up in fresh air, to achieve maximum

sensitivity.

Reset feature: Resetting the unit during operation performs a

similar function; it programs the circuit to ignore the level of refrigerant

present at the tip. Each time the RESET button is pressed, as you move

closer to the leak, the unit sets its threshold for detection to a level

above the current concentration being detected. By moving closer

to a large leak and pressing RESET each time a full detection

is indicated, the user can pinpoint the source of the leakage.

Similarly, the unit can be moved to fresh air and reset for

maximum sensitivity. Resetting the unit with no refrigerant present

(fresh air) causes any level above zero to be detected. Each time the

RESET button is pressed, the LED displays “8” for about ﬁve (5) seconds

to provide a visual conﬁrmation of the reset action.

SENSOR STATUS INDICATOR

The device automatically diagnoses and indicate the sensor’s status.

When on, the circuit automatically senses the condition of the sensor and

can indicate a failed or missing sensor.

If the circuit detects a failed or missing sensor, the display will show

and the leak detector will stop working. Please see "Cleaning Probe Tip"

on page 10.

FEATURES

AUDIBLE / VISUAL ALARMS – MUTE FEATURE

The unit features two notiﬁcation indications – an internal speaker

audible alarm and LED screen data visual alarm. When a leak is detected

the LED screen displays the leakage level. When the device is powered ON,

the audible indication is deactivated by default. The audible alarm may be

enabled by pressing the MUTE button, allowing the audible as well as

visual indication. Press the MUTE button again to disable the audible

alarm.

SENSITIVITY ADJUSTMENT

The LHHD250 has six (6) levels of sensitivity adjustment. When the

SENS button is pressed, the sensitivity is displayed in the Real

Time Detector Indicator area on the panel display as a number (1-6)

for 3 seconds and then goes back to a ﬂashing real time indication. 1 is the

lowest sensitivity and 6 is the highest.

BUTTON OPERATION

ON/OFF Press and hold for 2 seconds to turn the device “on” and

“o”.

RESET Reset sensitivity benchmark to improve stability and

sensitivity.

MUTE Press to toggle the audible alarm “on” and “o”.

SENS Press button to cycle through six (6) levels of sensitivity.

FEATURES (CONT.)

Keep the device away from moisture and high voltages.

To detect leakage in a system, the system must operate at a minimum

of 50 PSI. Environmental temperatures lower than 59°F (15°C) may

further reduce a system’s operating pressure, causing a leak to become

more dicult to detect. In such cases, “No Leak” may be falsely indicated,

requiring an alternate diagnostic means.

1. Turn on the unit by pressing and holding for 2 seconds then release

ON/OFF button.

2. The unit warms up and calibrates for approximately 30 seconds,

during which the middle LED will ﬂash “-”, and “gas ﬂow indicator”,

“and warm-up”, indicators will be on. Keep the LDHD250 away from

any areas of potential refrigerant leakage until the warm-up and

calibration period is over to achieve maximum sensitivity.

3. After warm-up, it displays a blinking “0” and the device is ready for use.

Press MUTE button to enable audible indication if desired, and the

device will emit a stable beeping.

4. Set the sensitivity level by pressing the SENS button according to

user’s demand, as described in the Sensitivity Adjustment Section, on

page 8.

5. Begin searching for refrigerant. Move the probe tip toward the

suspected leak. The ﬂexible probe may be shaped to provide access to

hard-to-reach areas. The tip of the probe may need to be within 1/4”

(0.64cm) of a small leak to detect it.

NOTE: If the device has previously been used, make sure that the

probe tip is not obstructed with dirt, grease, etc. See "Cleaning Probe

Tip" on page 10.

6. If refrigerant is detected, the device will begin to notify – the audible

tone will quicken and it displays number of leakage level. As the

concentration of the leak increases, the audible tone will increase in

cadence and the number on the display will begin to increase. Leaking

areas are usually covered with contaminants such as compressor oil

or dirt. Be careful not to contact such contaminants with the probe tip.

OPERATING INSTRUCTIONS

OPERATING INSTRUCTIONS (CONT.)

7. If notiﬁcation occurs before the leak source is pinpointed, the RESET

button may be used to pinpoint the leak, as described in the Automatic

Circuit/Reset Feature section, page 7. The unit may be reset as many

times as necessary to pinpoint the leak source. It is suggested to wait

for about ﬁve (5) seconds to detect the leakage after pressing RESET.

Likewise, in areas where the atmosphere is contaminated with refrigerant,

press reset key to “ignore” the leakage in the background. Make sure

not move the sensor tip away from the contaminated background while

resetting the detector.

BATTERY INSTALLATION

Hold the device tightly with two hands. Press the battery cover, drag

outward and remove it. Install the batteries into to the compartment and

close the cover. Note the proper battery orientation (polarity) of the

batteries during installation.

CLEANING PROBE TIP

Warning: Turn o device before cleaning the sensor.

Warning: The sensor may be hot after use. Please wait until sensor is the

same as the environmental temperature.

Keep the sensor tip clean: Remove probe tip by unscrewing it. Use cotton

cloth or dry air to clean the shield on the sensor tip if it gets contaminated.

If the probe tip itself is contaminated, soak the tip in absolute alcohol for

a few minutes, and then use compressed air to blow it dry, or dry it with a

clean cloth.

NOTE: Never use strong solvents such as gasoline, mineral oil, or

turpentine, as these solvents may coat the sensor with a thin ﬁlm and

reduce the sensitivity of the detector. DO NOT clean sensor!

STORAGE

Store the detector and the sensor in a dry (less than 80% RH) and clean

location. Remove the batteries if the detector is not used for more than a

month.

Indice

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