ERROR TYPE
(Warning, Blocking,
Lockout)
DESCRIPTION
ERROR
CODE
(OpenTherm)
REFER TO
SECTION...
HARDWARE (THERMISTORS, ACTUATORS)
B Flow thermistor open circuit (blocking) 1 5.9
B Flow thermistor short circuit (blocking) 2 5.9
B Return thermistor open circuit (blocking) 3 5.9
B / W Return thermistor short circuit (blocking) 4 5.9
B / W Flue thermistor open circuit (blocking) 5 n/a
B Flue thermistor short circuit (blocking) 6 n/a
W DHW thermistor open circuit 7 5.12
W DHW thermistor short circuit 8 5.12
W Outside thermistor defect (open / short) 9 5.10
B Water pressure sensor defect 10 n/a
L Flow thermistor open circuit (lockout after 24h) 11 5.9
L Flow thermistor short circuit (lockout after 24h) 12 5.9
L Return thermistor open circuit (lockout after 24h) 13 5.9
L Return thermistor short circuit (lockout after 24h) 14 5.9
L Flue thermistor open circuit (lockout after 24h) 15 n/a
L Flue thermistor short circuit (lockout after 24h) 16 n/a
L Heat thermistor open circuit (lockout after 24h) 17 5.9
L Heat thermistor short circuit (lockout after 24h) 18 5.9
TEMPERATURE SUPERVISIONS
B Blocking due to ow overheat 30 5.3
B Blocking due to return overheat 31 5.3
B Blocking due to ue overheat 32 n/a
B Flow & return reversed 33 5.11
B Flow gradient supervision 36 5.3
B Flue gradient supervision (reserved) 37 n/a
B Blocking delta temp ow/return 38 5.3
L Lockout ow overheat 39 5.3
L Lockout return overheat 40 5.3
SYSTEM (FLAME, FAN, HYDRAULIC, ETC.)
B Low water pressure 51 5.6
W No ame signal at start (restart) 52 5.7
W Flameloss during operation => endless restarts (Parameter “endless restarts” activated) 53 5.7
L Flameloss during operation, => Lockout after restarts attempts are used (Parameter “endless restarts” deactivated) 54 5.7
W Flameloss during stabilisation => restart attempts 55 5.7
L
Flameloss during stabilisation => Lockout after restarts attempt are used
56 5.7
L False ame (with heat demand) 57 5.7
L No ame after restarts 58 5.4
B/L Fan speed, stand still check 59 5.8
L Fan speed not achieved, e.g. Pre-purge-test, post-purge-test etc. 60 5.8
B/L Error fan speed during pre-purge (5* restarts => lockout ) 61 5.8
W Error min/max supervision fan speed during operation (restart) 62 5.8
W Warning due to mains overvoltage 63 check mains supply
B Blocking due to mains undervoltage 64 check mains supply
W Opentherm plus error (communication faulty; no connection anymore , etc) 65 5.14, 5.15
L Too many remote resets 66 power cycle the boiler
B HX water ow fault (feedback < min ow rate) 70 n/a
INTERNAL SYSTEM
L Request for re-update 94 contact service provider
B Blocking due to programming mode 95 contact service provider
L Lockout parameter mismatch 96 contact service provider
L Lockout parameter set 97 contact service provider
B/L Internal blocking error 98 contact service provider
L System lockout (internal lockout error) 99 contact service provider
5.2 FAULT FINDING MENU
64
Installation & Servicing
SECTION 5 - FAULT FINDING
FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING