Test Procedure - CTR CLT1 Manual De Instrucciones

Test procedure

Double click the minus (-) button until the unit switches off. This is indicated by the LED
tachometer display no longer being illuminated = zero compressor capacity load.
• Start & run the vehicle; then increase the idling speed to (~1500 U/min).
• Proceed by clicking the plus (+) button stage by stage (allowing a 15- second
gap between each stage). This will start to load the compressor control valve
mechanical capacity. Ensure that the vehicle A/C operating low & high side pressures
are changing accordingly on your manifold gauges.
• Care should be taken, as the high side pressure can increase during testing with the
CLT1, and the Quick start-up operation of vehicle control fans will interrupt correct
testing of the A/C compressor's control valve.
• Always observe the A/C system's temperatures & pressures while testing with the CLT1.
• Between each increase, observe whether the compressor promotes stages accordingly.
Setting
Maximum
Minimum
* Note that the tolerances are compared against ambient temperature compressor load
conditions, and must be evaluated in minimum & maximum stages while testing the compressor.
The changes on the low pressure side should be similar to the setting changes on the CLT1.
Low Pressure
1.6 +/- 0.5 bar
3 +/- 0.7 bar
LED "OC" indicates:
• Poor control valve connection
• Control valve complete interruption
• Control valve with a short circuit
(smaller than 3 ohm)
LED "OL" indicates:
• Too high power consumption
of the valve
Outlet Temp.*
0°C +/- 3°
10°C +/-3°
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