Fault Finding Menu - Keston HEAT 2 45 Installation & Servicing

5.2 FAULT FINDING MENU

ERROR TYPE
(Warning, Blocking,
Lockout)
HARDWARE (THERMISTORS, ACTUATORS)
B Flow thermistor open circuit (blocking)
B Flow thermistor short circuit (blocking)
B Return thermistor open circuit (blocking)
B / W Return thermistor short circuit (blocking)
B / W Flue thermistor open circuit (blocking)
B Flue thermistor short circuit (blocking)
W DHW thermistor open circuit
W DHW thermistor short circuit
W Outside thermistor defect (open / short)
B Water pressure sensor defect
L Flow thermistor open circuit (lockout after 24h)
L Flow thermistor short circuit (lockout after 24h)
L Return thermistor open circuit (lockout after 24h)
L Return thermistor short circuit (lockout after 24h)
L Flue thermistor open circuit (lockout after 24h)
L Flue thermistor short circuit (lockout after 24h)
L Heat thermistor open circuit (lockout after 24h)
L Heat thermistor short circuit (lockout after 24h)
B Heat thermistor open circuit (blocking)
B Heat thermistor short circuit (blocking)
W Header thermistor open circuit
W Header thermistor short circuit
W Room (hc1) thermistor open circuit
W Room (hc1) thermistor short circuit
TEMPERATURE SUPERVISIONS
Blocking due to flow overheat
B
B Blocking due to return overheat
Blocking due to flue overheat
B
B Flow & return reversed
B Flow gradient supervision
B Flue gradient supervision (reserved)
Blocking delta temp flow/return
B
Lockout flow overheat
L
L Lockout return overheat
Lockout flue overheat (flue thermistor)
L
Lockout thermal fuse (thermal fuse)
B Blocking due to heat exchanger overheat
SYSTEM (FLAME, FAN, HYDRAULIC, ETC.)
Blocking due to no CH water flow
B
B Low water pressure
No flame signal at start (restart)
W
Flameloss during operation => endless restarts (Parameter "endless restarts" activated)
W
Flameloss during operation, => Lockout after restarts attempts are used (Parameter "endless restarts" deactivated)
L
Flameloss during stabilisation => restart attempts
W
Flameloss during stabilisation => Lockout after restarts attempt are used
L
False flame (with heat demand)
L
No flame after restarts
L
B/L Fan speed, stand still check
L Fan speed not achieved, e.g. Pre-purge-test, post-purge-test etc.
Error fan speed during pre-purge (5* restarts => lockout )
B/L
W Error min/max supervision fan speed during operation (restart)
W Warning due to mains overvoltage
B Blocking due to mains undervoltage
Opentherm plus error (communication faulty; no connection anymore , etc)
W
L Too many remote resets
HX water flow fault (feedback < min flow rate)
B
66
SECTION 5 - FAULT FINDING
DESCRIPTION
ERROR
REFER TO
CODE
SECTION...
(OpenTherm)
1 5.9
2 5.9
3 5.9
4 5.9
5 n/a
6 n/a
7 5.12
8 5.12
9 5.10
10 n/a
11 5.9
12 5.9
13 5.9
14 5.9
15 n/a
16 n/a
17 5.9
18 5.9
19 5.9
20 5.9
21 5.10
22 5.10
23 5.10
24 5.10
30 5.3
31 5.3
32 n/a
33 5.11
36 5.3
37 n/a
38 5.3
39 5.3
40 5.3
41 1-6
42 5
50 1-4, 6
51 5.6
52 5.7
53 5.7
54 5.7
55 5.7
56 5.7
57 5.7
58 5.4
59 5.8
60 5.8
61 5.8
62 5.8
63 check mains supply
64 check mains supply
65 5.14, 5.15
66 power cycle the boiler
70 n/a
Installation & Servicing