Shut-Off Mode (Bxx) - REMEHA Quinta 30 Technical Information

6.4 Shut-off mode (bXX)

During shut-off mode condition the code-display will show a b, whilst the t-display
indicates the cause with two flashing dots.
Table below details cause of shut-off mode.
Code Description
B@% Maximum acceptable flow temperature rise exceeded. The boiler will shut
off for ten minutes, then restart. Should the flow temperature conditions
remain the same after 5 attempts, this code will be recorded as a shut-
down failure. Boiler will not lockout.
b@^ Contacts of the external interlock have opened during heat demand. The
boiler will shut off for 120 seconds. Should the contacts close again during
heat demand, the boiler will wait the remaining time from the 120 seconds
before attempting a restart.
B@* Internal check on fan speed. After 5 attempts, the boiler will lockout. This
code will be recorded.
B@( Internal check on fan speed. After 5 attempts, the boiler will lockout. This
code will be recorded.
B#) Maximum temperature difference between flow and return exceeded. The
boiler will shut off for 150 seconds, then restart. Should the temperature
difference conditions remain the same after 10 attempts, this code will be
recorded as a shut-down failure. Boiler will not lockout.
B$# One or several adjusted parameters out of range including some factory
defaults which should not have been changed. Check and reset parame-
ters:
- Press the 'reset'-key imidiately followed by pressing the 'm'-key for about
12 sec
- 'code'- display shows P
- Use [+] and [-]-keys to enter correct boiler parameter ( P=74)
- Press 'e'-key to confirm settings
Table 05 Shut-off codes
NOTE: Shut-off mode is a normal boiler operating function and does not represent a
boiler failure.
However, this may indicate a system problem, an internal boiler check or an incorrect
parameter setting.
57117.indd 19 57117.indd 19
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