Cetetherm Midi Compact TA
Installation, service and operating instruction
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8.3 Check DHWC pump
If the pump fails to start after stopping, try to start it at the highest setting.
Service actions must be carried out by an authorized service technician.
Disconnect the power supply to the pump by pulling off the connecter before carrying out this
service.
If the pump is powered when you use a screwdriver to assist the pump to start, the screwdriver
may be wrenched out of your hand when the pump starts.
1. If the pump does not start, try starting it by removing the pump
motor end nut and helping the pump with the aid of a screwdriver
in the notch on the engine shaft.
2. Use a short screwdriver. If the pump is difficult to access,
disconnect the heating actuator.
3. Connect the power supply to the pump and try to start again.
8.4 Check the volume take-up and pressure equalizing of the expansion vessel
Check the expansion vessel for possible leakage.
The cause may be that the expansion vessel cannot manage the volume changes on the heating side.
See
9.7 Change the expansion vessel
Alternatively, the system´s total volume of water may be too high, i.e. the volume changes are too large for the
expansion vessel. If so, add extra expansion volume.
Picture 17
