Prolonged Shutdown. Frost Protection (Central Heating Circuit); Troubleshooting; Routine Maintenance Instructions - Baxi Mainfour 240 F Manual Para El Usuario

9. PROLONGED SHUTDOWN. FROST PROTECTION
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.
Faults are shown on the display with an error code (e.g.: E 01):
Figure 3
CODE FAULT
DISPLAYED
E01 Failed ignition shutdown
E02
Safety thermostat tripped
E03
Flue thermostat/ flue pressure switch
tripped
E04 Shutdown after 6 consecutive flame
losses
E05 Delivery probe failure
E06 DHW sensor fault
E10
Hydraulic pressure switch block
E25/E26 Probable blocked pump safety trip.
E32 Limescale alarm
E35 Parasite flame (flamer error)
E96
Switching off due to reductions in the
power supply
NOTE:
in case of a fault, the display backlighting flashes together with the error code.

11. ROUTINE MAINTENANCE INSTRUCTIONS

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").
INSTRUCTIONS FOR USERS

10. TROUBLESHOOTING

RESETTABLE
faults
Press and hold down "R". for at least 2 seconds. If this fault persists, call the Authorised
Service Centre.
Press and hold down "R". for at least 2 seconds. If this fault persists, call the Authorised
Service Centre.
Call the Authorised Service Centre.
Press and hold down "R". for at least 2 seconds. If this fault persists, call the Authorised
Service Centre.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Check that the pressure in the system is correct; See section 6. If this fault persists,
call the Authorised Service Centre.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Press and hold down "R". for at least 2 seconds. If this fault persists, call the Authorised
Service Centre.
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.
NOTE:
5 reset attempts can be performed after which
the boiler shuts down. To reset again, switch off the
boiler for a few seconds.
CORRECTIVE ACTION
6
926.527.2 - EN