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17 - CONTROL OF CONDENSING PRESSURE FOR AIR-COOLED UNITS
One-circuit unit (or fault on one circuit of a two-circuit unit) :
Adjust as shown in diagram 1.
Two-circuit unit and if the compressor on circuit 2 running for at least 5 seconds :
- If HP1 or HP2 < A → Control shown in diagram 1 and taking into account the sensor with the lowest pressure.
- If A < (HP1 and HP2) < C → Control shown in diagram 1 and taking into account the sensor with the lowest pressure.
- If HP1 or HP2 > C → Control shown in diagram 2 and comparison of:
• Voltage U1 = Diagram 1 (lowest HP)
• Voltage U2= Diagram 2 (highest HP)
And voltage U adjusted to highest value of U1 and U2.
- If HP1 and HP2 > C → Control shown in diagram 1 and taking into account the sensor with the highest pressure.
■ P20 = No :
Output = 0 V
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