Danfoss PAHT C, Инструкция по установке, эксплуатации и обслуживанию

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Guide line | Trouble shooting guide for PAH, PAHT, PAHT C , PAHT G, PAHT 674 and PAH F pumps
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180R9316 | AQ176586503002en-000501 | IOM PAHT C 2-6.3 pumps | 01.2022
Cause Remedy Comments
3.1 Too high outlet pressure from pump 3 .1 .1 Check for blocked nozzles or a faulty
adjusted relief valve .
Pressure changes due to flow restrictions . This
will also cause high motor torque .
3.2 Pump starts against pressure 3 .2 .1 Check that electric motor is correctly sized .
3 .2 .2 Check internal parts (see item 2 .1) .
3 .2 .3 Systems with more than one electric motor
installed:
Start motors simultaneously .
Pumps run in parallel with cascade start, may
switch off the motor relay due to too high
torque caused by high outlet pressure .
3.3 Constant torque 3 .3 .1 Please contact Danfoss High Pressure
Pumps sales office .
If the electric motor is too small for the pump, it
cannot provide sufficient torque .
3.4 Water pump damage 3 .4 .1 Dismantle pump and check for wear . Too heavy damage in the pump will increase
friction causing a high torque (see item 6,
Typical signs of wear) .
3. High torque on electric motor