Bosch GWI-N Series Training And Service Information page 74

EE
Modulating solenoid (MV1) disconnected
Characteristic: electro-valve
Lock Out Error
No current for
modulation solenoid
End
EF
Output of appliance is too high
Lock Out Error
NG (G20) appliance
connected to LPG
(G30/31)
Note: all control unit as
spare parts are supplied
as NG (G20 in P7) and
12 in AP
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Burner shutdown and manual reset needed after repair
Check cables connection to
MV1 (red cables)
Yes
Problem solved?
No
Minimum Power too low
(ΔP of P2)
Burner shutdown and manual reset needed after repair
Check Gas type of
appliance and gas
supply
Gas supply different
from gas type on
appliance ?
No
Appliance power defined
in P4 – AP is not
according capacity ?
No
Appliance gas type
defined in P7 is not
according model ?
No
Appliance in Overload -
P1 / P2 too high
6 720 814 719 SM FP_Australia 2017/04 EN
Adjust P2 (increase L2 value
and A2 proportionally). In
case problem persists, leave
ΔP2 higher than value in IM.
Convert appliance –
Yes
refer to spare part list
and use defined kit
Enter service mode and
Yes
check / correct
adjustment.
Enter service mode and check /
Yes
correct adjustment.
Correct adjustments of ΔP for
P1 / P2 adjusting L1/L2/A1/A2
proportionally