Alfa Laval Micro - RTC Service Instructions; HTC Service Instructions; Service Actions for the Installer; Adjust the Handle on the Control Valve

Alfa Laval Micro
Installation, service and operating instruction
57
RTC service instructions
19.3
Symptom
Reason
Action
Heating system
temperature too
high or too low
The heating control equipment may
need to be adjusted
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
Heating valve and/or actuator does
not work
See 19.5.4 Check the actuator and valve function
No heating
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 6.5.1
Installing the batteries.
See 14 Troubleshooting the CM721
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 10.3 Temporary manual override.
HTC service instructions 19.4
Symptom
Reason
Action
Tap water
temperature too
low/ hot water
temperature
unstable or too low
Differential pressure control valve
incorrectly adjusted (option
See 15 Differential pressure control valve, DPC
Heating system
temperature too
high or too low
Heating valve and/or actuator does
not work.
See 19.5.4 Check the actuator and valve function
Service actions for the installer 19.5
Adjust the handle on the control valve 19.5.1
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.