24
ERROR TYPE
(Warning,
Blocking,
Lockout)
DESCRIPTION
ERROR CODE
(OpenTherm)
SYSTEM (FLAME, FAN, HYDRAULIC, ETC.)
B
Blocking due to no CH water flow
50
B
Low water pressure
51
W
No flame signal at start (restart)
52
W
Flameloss during operation => endless restarts
(Parameter “endless restarts” activated)
53
L
Flameloss during operation,
=> Lockout after restarts attempts are used
(Parameter “endless restarts” deactivated)
54
W
Flameloss during stabilisation => restart attempts
55
L
Flameloss during stabilisation
=> Lockout after restarts attempt are used
56
L
False flame (with heat demand)
57
L
No flame after restarts
58
B/L
Fan speed, stand still check
59
L
Fan speed not achieved, e.g. Pre-purge-test, post-purge-
test etc.
60
B/L
Error fan speed during pre-purge (5* restarts => lockout )
61
W
Error min/max supervision fan speed during operation
(restart)
62
W
Warning due to mains overvoltage
63
B
Blocking due to mains undervoltage
64
W
Opentherm plus error (communication faulty; no connection
anymore , etc)
65
L
Too many remote resets
66
B
No water flow indication
67
B
PWM pump blocking error (feedback 90%)
68
B
PWM pump electrical error (feedback 85%)
69
B
HX water flow fault (feedback < min flow rate)
70
B
PWM pump dry run error (feedback 80%)
71
B
Warning code from pump (feedback 75%)
72
