REMEHA Quinta 85 Technical Information page 56

Setting failure
0*
Failure of
1!
internal
communication
bus
Flow
1*
temperature
too high
Return
1(
temperature
too high
Return temp >
2$
flow temp
Fan not
2*
running
Fan runs
2(
continuously or
speed signal
not correct
Temperature
3!
sensor failure
3@
3$
3^
3&
Setting failure
4)
Ionisation
7&
failure during
boiler operation
Other Control box
Codes failure
Table 18 Faultcodes
- check parameter D (second digit must be 0)
- short circuit in flat cable: replace flat cable
- water/condensation on display
- possibly external EMC contamination
Check:
- the waterflow, ref. Par. 7.4.7.
- system for trapped air
- sensors for resistance at set temperature, see graph
in Fig. 21.
- if the boiler is full of water (min. pressure 0.8 bar)
- Flow sensor badly installed
- Pump operating in wrong direction or flow and return
connections crossed
- Fan or motor failed
- Supply and/or signal control cable – poor connections
or failed.
- Check control cable connections and for continuity
- Fan defective
- Flue draft conditions too high
Flow temperature sensor short circuit
Return temperature sensor short short circuit
Outside temperature sensor short short circuit
Flow temperature sensor not connected or open circuit
Return temperature sensor not connected or open circuit
check parameter D (first digit must be 0)
After 4 restarts during 1 heat demand
- flue gas recirculation (internal/external)
- insufficient air flow – check fan or air inlet/flue outlet for
obstruction
- incorrect combustion.
- Press the 'reset'-key
- When fault returns, check wiring for short circuits
- When faults still return, replace the control box
Shut-off codes, see Par. 6.4.
56
Remeha Quinta 85