REMEHA Quinta 30 Technical Information page 54

Code Description
Flame
0)
simulation
Short circuit
0!
24V
No flame or no
0@
ionisation (after
5 start attemps)
Note:
Ionisation
measurement
in Volts
between
terminal 4 and
earth, see Fig.
23 (1V dc º
1m A dc)
0$
External
0%
Cause/check points and remedy
- Gas valve shuts but burner surface continues to glow
due to incorrect combustion.
- Gas valve off but leaking on shut-down - burner flame
continuing.
Check wiring.
a. No ignition spark, check:
- connection of ignition cable and spark plug cap
- ignition cable and electrode for insulation breakdown
- electrode gap; must be 3-4 mm
- earth continuity
b. Ignition spark, but no flame, check if:
- gas cock is open
- inlet gas pressure is sufficient
- gas pipe is vented (special attention for LPG use)
- gas valve is energised during ignition and also opens
- electrode is fitted properly, is clean and set
- the gas/air ratio is correct (see Par. 9.1)
- the gas pipe is not clogged or incorrectly sized
- the air supply and flue outlet is free of obstructions
- if the condensate siphon is clear
- there is no flue gas recirculation (internal/external)
c. Flame, but no or insufficient (<4mA) ionisation,
check flame
- is flame core visible?
- is flame geometry stable?
- Check CO at both part and full flame
2
- Check ignition probe earthing
- Check temperature sensors for loss current (humidty on
sensors)
Visual check of ignition/ionisation probes:
- if white oxydes show, use sand paper or screwdriver for
cleansing
- check geometry and distance between both probes, i.e.
3 to 4 mm.
Voltage failure after lock out condition – original lock out
54
cause will not be displayed – check read out table for
additional fault code, ref. Par. 6.9.
- power or control supply affected by external EMC –
Remeha Quinta 30