Alfa Laval Micro Instructions D'installation, D'entretien Et D'utilisation page 61

19.5.4 Check the actuator and valve function
Service actions must be carried out by an authorized service technician.
Check the actuator and valve function
Check the actuator by pulling out the electrical cable and refit it again;
this will start an automatic self-test for the actuator. Check the flow
using the energy meter while test-running the valve.
If no energy meter is available, disconnect the heating actuator from the
valve. Carefully depress the valve's spindle with a tool and check the
valve's travel and spring back.
Note: The valve may be very hot
19.5.5 Run the pump manually
Service actions must be carried out by an authorized service technician.
If it becomes necessary to run the pump and actuator manually, this can be done by disconnecting the power to
the room thermostat.
Disconnect the electrical plug for the pump. Connect the replacement cable (option) to the power supply and to
the circulation pump. Next, open the heating valve manually using the knob on the actuator. Open the control
valve sufficiently to satisfy the heating needs.
19.5.6 Change pump components or the complete pump
Service actions must be carried out by an authorized service technician.
If it becomes necessary to change the driving side of the pump, it can be dismantled without removing the
whole pump. See chapter 20.5 Change the
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pump.
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Alfa Laval Micro
Installation, service and operating instruction
Picture 48