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- All evaporator return bends/hairpins should be at or slightly above evaporator saturation
temperature from the pressure/temperature chart.
- All condenser return bend/hairpins should be at or slightly less than condenser saturation
temperature.
- If a group of return bends/hairpins do not conform to expected temperatures, that indicates a
blocked or restricted distributor or distributor tube.
CHANGING THE BATTERY
To install or change the 9V battery, open the battery compartment the battery as shown in Figure 2.
CLEANING THE LENS
Blow off loose particles using clean compressed air.
Carefully wipe the surface with a moist cotton swab.
The swab may be moistened with water.
CLEANING THE HOUSING
Use soap and water on a damp sponge or soft cloth.
To avoid damage to the Thermometer, do not soak the unit into water.
To avoid damaging the Thermometer, do NOT submerge it in water.
Caution!
Symptom
OL (on display)
-OL (on display)
Blank Display
Laser does not work
Beeper beeps
continuously
MAINTENANCE
TROUBLESHOOTING
Table 4. Troubleshooting
Problem
Target temperature is over range
Target temperature is under range
Low Battery
Possible dead battery
1. Low or dead battery
2. Ambient temperature above 40ºC
(104ºF)
1. Has the High/Low feature been set?
And
2. Measurement value has over the
limit
Action
Select target with specifications
Select target with specifications
Replace Battery
Check and / or replace battery
1. Replace battery
2. Use in area with lower ambient
temperature.
3. Reset the setting or
4. Cancel the limit setting
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