Bosch GWI-N Series Training And Service Information page 69

[R] Ω = Current Temp.
(ºC) ?
Yes
Problem solved?
No
Appliance installed as
a solar backup unit?
No
Error code self reset
when temperature
decrease and appears
repetitively?
E2
Failure in the inlet water temperature sensor
Component Characteristic: NTC Temperature sensor
Warning Message
The inlet NTC sensor
is interrupted or in
short circuit
Refer to table with
values in Service
Manual
See spare part list
Page 69 from 76
Replace Sensor
Maximum inlet appliance is 60ºC –
Yes
ensure existence of thermostatic
mixing valve before unit
Yes
Maximum power very high
Appliance keeps operation and code is flashing
Ensure NTC wire is
attached in NTC sensor
Unplug Wires and measure
the NTC electrical
resistance [R] (Ω)
[R] > 30 kΩ or < 0.5 kΩ
Yes
NTC values out of
range
Replace NTC
Plug NTC connection
wire and turn ON unit
6 720 814 719 SM FP_Australia 2017/04 EN
ATTENTION:
Blue wires – inlet NTC
No
[R] = ∞ Ω
Yes
NTC interrupted
No