Alfa Laval AquaMicro, Инструкция по установке и обслуживанию

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Alfa Laval Micro
Installation and service instruction
54
B. No heating
Reason Action
B1)
Loss of function in the heating
control unit. Check the batteries in the room thermostat
When the power is running low a flashing symbol will be displayed on the
screen, see
4.6.1 Installing the batteries.
See 10 Troubleshooting the CM721.
B2) RF communication problem Make a manual override
If there is a communication problem between the room thermostat and
the relay, make a manual override see
6.3 Temporary manual override .
HTC service instructions 14.4
A. Tap water temperature too low/ hot water temperature unstable or too low
Reason Action
A1)
Differential pressure control valve
incorrectly adjusted (option) Check the settings for the differential pressure control valve
See chapter 11 Differential pressure control valve, DPC , for information
how to set the valve.
B. Heating system temperature too high or too low
Reason Action
B1)
Heating valve and/or actuator
does not work 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
Picture 48