DeDietrich MS 24, Operating And Installation Instructions

Page: 73 / 332

73
71.03982.03 - EN
OPERATING INSTRUCTIONS
10. TROUBLESHOOTING
Do not drain the whole system as filling up with water again causes unnecessary and harmful scale to build up inside the
boiler and the heating elements. If the boiler is not used during winter and is therefore exposed to the danger of frost, add
some specific anti-freeze to the water in the system (e.g.: propylene glycol coupled with corrosion and scale inhibitors).
The electronic boiler management system includes a “frost protection” function for the heating system which, when delivery
temperature falls below 5°C, operates the burner until a delivery temperature of 30°C is reached.
The frost protection function is enabled if:
* the boiler is electrically powered;
* the gas tap is open;
* the system is at the correct pressure;
* the boiler is not blocked.
9. PROLONGED SHUTDOWN. FROST PROTECTION
N.B.:
in case of a fault, the display backlighting flashes together with the error code.
To keep the boiler efficient and safe, have it checked by the authorised Service Centre at the end of every operating period.
Careful servicing ensures economical operation of the system.
Do not clean the outer casing of the appliance with abrasive, aggressive and/or easily flammable cleaners (e.g.: petrol,
alcohol, and so on). Always switch off the appliance before cleaning it (see section 7 Switching off the boiler).
11. ROUTINE MAINTENANCE INSTRUCTIONS
Faults are shown on the display with an error code (e.g.: E 01):
CODE
DISPLAYED
FAULT CORRECTIVE ACTION
E01 Failed ignition shutdown
Press and hold down “ R ” for at least 2 seconds. If this fault persists, call the
Authorised Service Centre.
E02 Safety thermostat tripped
Press and hold down “ R ” for at least 2 seconds. If this fault persists, call the
Authorised Service Centre.
E03
Flue thermostat/ flue pressure
switch tripped
Call the Authorised Service Centre.
E04
Shutdown after 6 consecutive
flame losses Press and hold down “ R ” for at least 2 seconds. If this fault persists, call the
Authorised Service Centre.
E05 Flow sensor failure Call the Authorised Service Centre.
E06 DHW sensor fault Call the Authorised Service Centre.
E10
Hydraulic pressure switch
block Check that the pressure in the system is correct; See section 6. If this fault
persists, call the Authorised Service Centre.
E25/E26
Probable blocked pump safety
trip
Call the Authorised Service Centre.
E35 Parasite flame (flame error)
Press and hold down “ R ” for at least 2 seconds. If this fault persists, call the
Authorised Service Centre.
E96
Switching off due to reductions
in power supply
RESET is automatic. If this fault persists, call the Authorised Service Centre
To RESET the boiler, press and hold down “R” for at
least 2 seconds. If this fault persists, call the Authorised
Service Centre.
N.B.:
5 reset attempts can be performed after which
the boiler shuts down. To reset again, switch off the
boiler for a few seconds.
Figure 3
0607_1205
RESETTABLE
faults