Installation manual

installation manual TWIN 80 EN
(E000129016 - installation manual TWIN 80 EN - 030106v07
33
4.2.3. Status indication during ”lock-out”
- gas valve off
- glow plug off
- ionisation off
- fan off (some lock-outs, post rinse for 1 minute)
- pump on (max 24 hr)
What is a lock-out?
During lock-out operation, the display status shows a flashing indication. The regulation may lock-out for safety reason or after four
consecutive failed start attempts.
Most lock-out operations can be restored by pressing the ‘Set/Reset’ button. It is advised not to ask installer for help after using this
button several times in a row. Some lock-out operations need an interruption of the supply power.
Status
code
description action repair
1
flashing
boiler does not pass
temperature test
- after burner start, the temperature difference between
flow sensor and return sensor must be raised by 3°C within
the first 20 seconds. If the difference is not made, the
burner is restarted.
- after three restarts, within one heat demand, the boiler
runs into lock-out.
- check both flow and return
sensors for function
- check flow of system water
(blockage in pump area)
2
flashing
too many re-start during
operation
- If during operation
the ionisation fails, the gas valve shuts
off immediately and a restart is made. If this failure causes
a third restart within the burner demand, the boiler runs into
lock-out
- check flame stability
- check flame signal
- check ionisation wiring
- blocked condensation discharge
(condensate try full with water)
3
flashing
internal communication
error
- internal regulation fault
- A/D conversion fault
- external component fault
- interrupt 230 V supply power
- replace printed circuit board
4
flashing
low flue gas
temperature (–25°C)
f the flue sensor measures a temperature below –25°C, the
boiler runs into lock-out
check flue gas sensor
5
flashing
fan speed malfunction
- If the measured fan speed, in operation, deviates from the
desired fan speed, the burner will be switched off, and
post-purge will start. If this blocking action lasts for more
than 1 minute, the boiler runs into lock-out
- If the measured fan speed exceeds the maximum fan
speed, the regulation blocks. If this blocking action lasts for
more than 1 minute, the boiler runs into lock-out
- communication fault
- broken fan motor
- printed circuit board failure
- check the fan for functioning
- check the fan coil resistance on
the two outermost terminals (R =
115 Ohm at room temp)
- check if the printed circuit board
powers 230 VAC on the two
outermost contacts of the fan
connector during start
6
flashing
N/A
7
flashing
gas valve malfunction
- communication fault
- broken gas valve coils
- printed circuit board failure