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
Maximum acceptable flow temperature rise exceeded. The boiler will shut
B@%
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.
Contacts of the external interlock have opened during heat demand. The
b@^
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.
Internal check on fan speed. After 5 attempts, the boiler will lockout. This
B@*
code will be recorded.
Internal check on fan speed. After 5 attempts, the boiler will lockout. This
B@(
code will be recorded.
Maximum temperature difference between flow and return exceeded. The
B#)
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.
One or several adjusted parameters out of range including some factory
B$#
defaults which should not have been changed. Check and reset parameters:
- 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.
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