CTR CLT 1, Руководство пользователя, Страница: 11 / 82

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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 Low Pressure Outlet Temp.*
Maximum 1.6 +/- 0.5 bar 0°C +/- 3°
Minimum 3 +/- 0.7 bar 10°C +/-3°
* 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.
English
11
Possible solenoid valve err
ors
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