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De Dietrich Gas 310/610 ECO
12.3 Control strategy
During normal operation, the boiler control can operate
according to a specific strategy. Most control
strategies are meant to keep the boiler burning for as
long as possible, regardless of changes in flow and
flow problems, etc.
The control strategies can be viewed in read-out mode
with the code .
= modulate up (control below ionization limit)
= modulate down (maximum temperature difference
between flow and return)
= minimum output (return temperature higher than
flow temperature)
= modulate down (flue gas temperature too high)
= pump/boiler on (frost protection)
= zero-flow protection 2 (minimum output)
= zero-flow protection 1 (modulate down)
= boiler block temperature too high (control stop)
12.4 Shut-off ()
12.4.1 Shut-off
During shut-off, the code window displays and the
window indicates the shut-off code.
Important!! Shut-off is, a normal boiler
operating function and does not represent a boiler
failure. However, this may indicate a system problem
or an incorrect parameter setting.
12.4.2 Shut-off mode
In shut-off mode last shut-off and corresponding
operating codes can be reviewed. With PC (version
Recom PC and higher) or PDA the last six shut-off’s
can be reviewed.
During this particular mode both dots in the window
flash.
The last shut-off and corresponding operating codes
and applicable temperatures are stored in the micro-
processor memory and can be read out in shut-off
mode as follows:
- Enter the service code  (see section 13.2).
- Press the key until appears in the code window
(flashing digit with flashing dot).
Select the required step with the key.
Code

Description
  Shut-off code (see table 23)
 
operating code, at shut-off intervention (section 12.1)
 
Flow temperature, at shut-off intervention
 
Return temperature, at shut-off intervention
 
Flue gas temperature, at shut-off intervention


Boiler block temperature, at shut-off intervention


Time from shut-off intervention (PC software °only)
 
Ionization level (analog), at shut-off intervention
 
operating hours (hundred thousand, and ten thousand)
 
operating hours (thousand and hundreds)
 
operating hours (tens and units)
 
Fan speed at shut-off intervention (thousands and hundreds)
  Fan speed at shut-off intervention (tens and units)
Table 10 Shut-off in service level
The letters and numbers in the code window and the
window are explained in appendix 16.2.
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