24
B029
IS
THERE STILL A
PROBLEM?
FUNCTIONS
NORMALLY
NO
YES
LIST OF MALFUNCTIONS
POSSIBLE CAUSES
1
2
3
4
5
6
7
8
9
Delivery of hot water for domestic use:
when thetap is turned on,theburner goes out.
Delivery of hot water for domestic use:
theradiatores areheated in summer mode.
Delivery of hot water for domestic use:
water temperatureis not satisfactory.
Delivery of hot water for domestic use:
noisy operation.
Drop/increasein pressurein primary circuit.
Repeated shutdowns.
Safety thermostat is triggered repeatedly.
When thecold water tap is turned off,the
boiler comes on.
Temperatureof radiators not satisfactory.
Delivery of hot water for domestic use:
when thetap is turned on,theburner goes out.
Delivery of hot water for domestic use:
theradiatores areheated in summer mode.
Delivery of hot water for domestic use:
water temperatureis not satisfactory.
Delivery of hot water for domestic use:
noisy operation.
Drop/increasein pressurein primary circuit.
Repeated shutdowns.
Safety thermostat is triggered repeatedly.
When thecold water tap is turned off,the
boiler comes on.
Temperatureof radiators not satisfactory.
- Air in thesecondaryexchanger
- Hot water pressureswitch isdefective
- 3-wayvalveisdefective
- 3-wayvalveisdefective
- Check heating sensors
- Check gassettingsand regulation
- Check water flow rate
- Check exchanger for domestic hot water
- Primaryexchanger isdefective
- Low water pressurein heating system
- Check gassettingsand regulation
- Check for leaksin heating circuit
- Defectivewater supply inlet valve
- Secondaryexchanger isdefective
- Expansion vessal isempty
- Detection electrodesaredefective
- Check gassettingsand regulation
- Check electrical circuit for flamedetection
- Faulty(contacts)ntc heating sensors-
- Defective(poorlycalibrated)safetythermostat
- Presenceof air in theprimarywater circuit
- Drop in pressurein thewater mains,resulting
in water hammering
- Check ntc heating sensor
- Check by-pass
- Check gassettingsand regulation
- Air in thesecondaryexchanger
- Hot water pressureswitch isdefective
- 3-wayvalveisdefective
- 3-wayvalveisdefective
- Check heating sensors
- Check gassettingsand regulation
- Check water flow rate
- Check exchanger for domestic hot water
- Primaryexchanger isdefective
- Low water pressurein heating system
- Check gassettingsand regulation
- Check for leaksin heating circuit
- Defectivewater supply inlet valve
- Secondaryexchanger isdefective
- Expansion vessal isempty
- Detection electrodesaredefective
- Check gassettingsand regulation
- Check electrical circuit for flamedetection
- Faulty(contacts)ntc heating sensors-
- Defective(poorlycalibrated)safetythermostat
- Presenceof air in theprimarywater circuit
- Drop in pressurein thewater mains,resulting
in water hammering
- Check ntc heating sensor
- Check by-pass
- Check gassettingsand regulation
D
