Hoval TopGas 80, Installation Instructions Manual

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FAULTS
8. Faults
If a fault occurs the boiler will be shut down immediately.
There is a differentiation between blocking and locking.
Blocking means that the boiler can restart itself when the-
re is no more failure. After repairing locking fault it is ne-
cessary to press the Reset-key to confirm, so the boiler
can start again.
The failure will be shown on the display of the boiler. The
failure code shows if it is a blocking or a locking, and the
type of the failure specified more detailed.
P xx Blocking -> constant indication of the failure code
E xx Locking -> blinking indication of the failure code
If there is a blocking or a locking the main / boiler pump is
running permanentely (HT-Mode).
Blocking:
P 17 Return > (Flow + 10K) for 30 Sec
If the return temperature is at least 5K higher than the
flow temperature for at least 10 seconds it causes a lo-
cking.
P 18 Flow temperature is too high
If the flow temperature is higher than 95°C (defined flow
temperature limit), a blocking is caused. There is a hys-
terises of 5K.
P 19 Return temperature is too high
If the return temperature is higher than 95°C (defined re-
turn temperature limit), a blocking is caused. There is a
hysterises of 5K.
P 25 Increasing of flow temperature is too high
If the defined gradient limiting curve (parameter 15 (2BE))
is exceeded, a blocking is caused. Before the blocking
occurs, the speed is minimised. There is also a limiting
curve existing (parameter 16 (2BF).
P 26 Gas pressure is too low/ gas pressure key is bro-
ken/ external blocking (p.e.: emergency-stop deflector)
Occurs, when the burner is demanded and the gas pres-
sure is too low as well as there is an external blocking.
P 27 Water pressure is too low
If the water pressure is too low this will be signalised by
the gas pressure switch. The boiler weill be blocked.
P 28 Blocking entry is open
If the blocking entry is opened the boiler occurs a blo-
cking.
P 29 Flow rate control
When the flue gas temperature is higher as the flow tem-
perature (more than 40°C) so a blocking of the boiler oc-
curs. A hysteresis of 10K needs to be extended before the
blocking „Flow rate control“ is cancelled. This control is
both valid for heating and hot water operation.
P 30 Temperature difference flow - return too large
As soon as the difference between flow and return tem-
perature is higher than the value of the parameter 59 plus
15K, a blocking occurs. The range between the value of
parameter 59 und 5K before the shut-down point will be
modulated to the minimum speed linear.
P 52 Flue gas temperature blocking
If the limiting temperature (parameter 58 (2GC) is excee-
ded, a blocking occurs. See drawing 5. Instead of the flue
gas temperature the boiler body is observed.
Locking:
E 01 Flow sensor short-circuit
If the temperature is higher than 125°C the connected
flow sensor seems as short-circuit and responds with a
locking. Temperature jumps, which are higher than 50°C/
sec, it also occurs locking.
E 02 Locking temperature flow
If the temperature is higher than 100°C by the flow sensor
occurs a locking.
E 03 Flow sensor interruption
If the temperature is lower than –20°C the flow sensor
seems as disconnected and responds with a locking.
E 04 Return sensor short-circuit
If the temperature is higher than 125°C the connected
return sensor seems as short-circuit and responds with a
locking. Temperature jumps, which are higher than 50°C/
sec, it also occurs locking.
E 05 Locking temperature return
If the temperature is higher than 100°C by the return sen-
sor occurs a locking.
E 06 Return sensor interruption
If the temperature is lower than –20°C the return sensor
seems as disconnected and responds with a locking.
E 07 Flue gas sensor short-circuit
If the temperature is higher than 125°C the connected
flue gas sensor seems as short-circuit and responds with
a locking. Temperature jumps, which are higher than
50°C/sec, it also occurs locking.
E 08 Flue gas sensor interruption
If the temperature is lower than –20°C the flue gas sensor
seems as disconnected and responds with a locking.
E 09 No flames after ignition
If there is no flame after 4 starts because there wasn‘t
any ionisation measurable after the safety time ends, a
locking is occurred.