Renfert Magma Bedienungsanleitung Seite 37

Error
Heating status display
fails to go on even
though the heater has
been switched on with
the Stop/Start key.
Heating status display
indicates heating but
the oven fails to warm.
Temperature display
stays at a specific
value even though the
oven heats.
Extremely excessive
temperature; oven
overheats.
The programme imme-
diately starts when the
oven is switched on.
The wrong time is in-
dicated in the standby
mode.
The indicated casting
time makes no sense
The year indicator
flashes each time the
oven is switched on
Err 1 to Err 4
Err 5 and Err 6
Err 7
Possible cause
• Oven door not closed.
• Door sensor fallen off.
• Faulty door sensor.
• Faulty internal door open detec-
tion switch.
• Faulty thermocouple.
• Faulty heater coil.
• Faulty power electronics.
• Faulty thermocouple.
• Faulty thermocouple.
• Faulty power electronics.
• Oven was switched off before
programme ran to completion.
Switching the oven off was inter-
preted as a power failure.
• Clock not set.
• The clock backup battery is
dead.
• Faulty system time.
• Backup battery is dead.
• External fault
• Faulty controller
• Too much cold material placed in
a warm oven.
• Door left open too long.
• Thermocouple cable loose.
• Faulty thermocouple.
• Faulty thermocouple.
• Oven cooled with compressed
air and heating programme start-
ed (temperature increase due to
the heat retained in the oven).
Corrective action
• Close the unit door.
• Reinstall the door sensor (refer to Sec. 6.5).
• Replace the door sensor (refer to Sec. 6.5).
• Have the unit repaired.
• Replace the thermocouple (refer to Sec. 6.4).
• Have the unit repaired.
• Have the unit repaired.
• Replace the thermocouple (refer to Sec. 6.4).
• Replace the thermocouple (refer to Sec. 6.4)
• Have the unit repaired.
• Wait until the programme concludes before
switching the oven off or prematurely termi-
nate the programme with the Stop/Start key.
• Check the system time and reset, as required
(refer to Sec. 2.3.1).
• Replace the backup battery (refer to Sec. 6.6).
• Check the system time and reset, as required
(refer to Sec. 2.3.1).
• Replace the backup battery (refer to Sec. 6.6).
• Switch the oven off, then on, and repeat the
interrupted procedure (e.g., restart the heating
programme).
• Have the unit repaired.
• Restart the heating programme.
• Restart the heating programme.
• Check that the heating cable is securely at-
tached. Reattach as required.
• Replace the thermocouple (refer to Sec. 6.4).
• Replace the thermocouple (refer to Sec. 6.4).
• Allow the oven to cool off.
- 13 - EN