Test # 2
Description: Pressure between low pressure pump and filter.
Correct value: 2.5 bar
Test # 2 results:
– Correct pressure: 2.5 bar. Go to test # 3
– Significantly higher pressure (test # 1 was correct): Dirty filter. Replace filter cartridge
– Significantly lower pressure and test # 1 was also significantly lower:
– turn off tap: 1) Pressure is 2.5 bar or higher: Faulty regulator.
2) Pressure is too low: Faulty low pressure pump.
Test # 3
Description: Return circuit pressure test.
Correct value: 0.7 ÷ 0.8 bar
Test # 3 results:
– Correct pressure: 0.7 ÷ 0.8 bar. Test finished successfully.
– Significantly higher pressure: Return tube obstructed. Once replaced, if pressure remains high,
return valve of high pressure pump is faulty.
– Significantly lower pressure: Return valve of high pressure pump is faulty.
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