At this time, the lower left corner records the initial pressure value; the
lower right corner shows the instantaneous pressure value; the “ΔP” display
area shows the difference between initial pressure value and instantaneous
pressure value.
The time display area shows how long the leak test lasts in the format of
Hour : Minute (HH:MM). All the pressure units on the screen are the same.
You can switch different pressure units by pressing the unit button.
7. Common problems
7-1. Low battery power supply
The instruments has low power sign. When it is displayed , it means the
battery power is insufficient. At this time, the battery should be replaced as
required in order to avoid affecting normal use.
7-2. Damaged refrigerant hose or valve stem
Please check the pipe fittings and the hoses before testing. Once any
damage is found , please replace it immediately to avoid improper use or
any accident occurring.
7-3. Failure of refrigerant filling
There is a valve core in the refrigerant inlet of the refrigeration system.
When connecting the instrument, pay attention to the two terminals of the
hoses. Connect one terminal with a core to the refrigeration system, while
another terminal without a core to the instrument.
7-4. Potential leak points
Every hose terminal comes with a nylon pad that is limited a certain life of
using. Over use or other situation will make it defective, which result in
leakage.
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