Alfa Laval Micro Instructions D'installation, D'entretien Et D'utilisation page 59

19.3 RTC service instructions
Symptom Reason
Heating system
The heating control equipment may
temperature too need to be adjusted
high or too low
Heating valve and/or actuator does
not work
No heating Loss of function in the heating
control unit.
RF communication problem
19.4 HTC service instructions
Symptom Reason
Tap water
Differential pressure control valve
temperature too incorrectly adjusted (option
low/ hot water
temperature
unstable or too low
Heating system Heating valve and/or actuator does
temperature too
not work.
high or too low
19.5 Service actions for the installer
19.5.1 Adjust the handle on the control valve
Service actions must be carried out by an authorized service technician.
The hot water temperature can be controlled by turning the handle, on the control valve for domestic hot water,
anti-clockwise for increased tap water temperature. To decreasing tap water temperature turn the handle
clockwise until the desired tap water temperature is reached (50ºC approx.). The stabilisation time for the hot
water temperature is about 20 seconds.
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57
Installation, service and operating instruction
Action
Check and adjust the heating program in the
room thermostat.
See 8.6 Modifying the heating program in the
room thermostat CM721
Check that the relay is on
See 10.3 Temporary manual override
See 19.5.4 Check the actuator and valve function
Check the batteries in the room thermostat
When the power is running low, a flashing symbol
will be displayed on the screen, see
Installing the batteries.
See 14 Troubleshooting the CM721
Make a manual override
If there is a communication problem between the
room thermostat and the relay, make a manual
override see 10.3 Temporary manual
Action
See 15 Differential pressure control valve, DPC
See 19.5.4 Check the actuator and valve function
Alfa Laval Micro
6.5.1
override.