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SHT Heiztechnik,
aus Salzburg
Operating instructions
M21/HB M27/GB
Page 50
SHT Heiztechnik aus Salzburg GmbH, A-5020 Salzburg-Bergheim, Rechtes Salzachufer 40 Tel. 0662-450444-0, Fax-DW 9
Our current general terms and conditions apply.Errors, printing faults and technical changes reserved
ERROR 70
"CRITICAL Settings ! Changes only by auth.persons"
Triggered, if you enter the "expert level" in the "customer service" menu.
It shall call attention to the fact that there are machine settings in this menu; unqualified changing can
cause grace errors and damages of the boiler!!
WHAT TO DO?
Leave the menu; do not change the settings!!
ERROR 71
"Temperature Boiler below 6°C BURNER ACTIVATED!!"
In status burner "OFF" (home screen "OFF"), the boiler temperature has fallen below the frost
protection limit (6°C); the pellet burner is activated for the duration of the minimum running time (up
to 1.5 hrs); afterwards the "burner switch" is set back to "OFF".
WHAT TO DO?
Delete the message (see point 8). Check fuel reserves (to ensure the frost protection operation).
ERROR 72
"Temperature Dom.water < 6 °C BURNER ACTIVATED!"
In status burner "OFF" (home screen "OFF"), the boiler temperature has fallen below the frost
protection limit (6°C); the pellet burner is activated until the buffer is sufficiently loaded and the value
for "Low-Temp. / Loading Start" of the domestic hot water cylinder is reached; afterwards, the "burner
switch" is set to "OFF".
WHAT TO DO?
Delete the message (see point 8). Check fuel reserves (to ensure the frost protection operation).
ERROR 73
"Temperature Heating < 6°C BURNER ACTIVATED!"
In status burner "OFF" (home screen "OFF"), the boiler temperature has fallen below the frost
protection limit (6°C); the pellet burner is activated until the heating circuit temperature has exceeded
the frost protection limit; afterwards the "burner switch" is set back to "OFF".
WHAT TO DO?
Delete the message (see point 8). Check fuel reserves (to ensure the frost protection operation).