Bosch GWH 345 ESR-N Manual page 32

Maintenance and service
Mode Parameter
01 Not used
02 Not used
03 Error code history
04 Outlet water temperature
05 Selected outlet water
temperature
06 DHW temperature (only if
12kOhm thermistor used)
07 Selected DHW temperature
(only if 12kOhm thermistor
used)
08 Not used
09 Pressure switch
10 Temperature limiter
11 Not used
12 Gas valve
Modulating gas valve
13
position (%)
14 Thermostat
15 Fan
16 Ionization
17 Not Used
18 Not Used
19 Not Used
20 Not Used
21 Digital display test
22 Temperature unit selection
(°C or °F)
Table 16
Parameter storage
B Keep pressing the reset button
seconds in order to record adjustments. The digital
display blinks with the symbol
32
Values
---------- (displayed values have no relevance)
---------- (displayed values have no relevance)
Displays the last 8 error codes. Use the hot water temperature selector
(right dial) to toggle from newest (left) to oldest (right) error codes.
Displays the real-time outlet temperature as detected by the outlet
temperature sensor.
Displays the outlet water temperature as selected by the user during
normal operation.
Displays the real-time temperature of the DHW tank as detected by the
12kOhm external thermistor. (Display will show 32 if thermistor not
used)
Displays the domestic hot water temperature as selected by the user (only if
12kOhm external thermistor used).
---------- (displayed values have no relevance)
00 - Open pressure switch - fan is off or there is no exhaust gas flow
01 - Closed pressure switch - fan is on or there is exhaust gas flow
01 - temperature is below the limit (220°F)
E9 - temperature is above the limit (220°F)
---------- (displayed values have no relevance)
00 - gas valve closed
01 - gas valve open
00 - gas valve closed
01-70 - gas valve position min/max
00 - thermostat open
01 - thermostat closed
00 - fan off
01 - fan on
00 - no flame detected
01 - flame detected
---------- (displayed values have no relevance)
---------- (displayed values have no relevance)
---------- (displayed values have no relevance)
---------- (displayed values have no relevance)
All LCD components appear
Use the hot water temperature selection knob to select temperature
units °C or °F. (ccw for °C and cw for °F)
Exiting Diagnostic mode
B Press ON/OFF button to turn appliance OFF and
for at least 2
.
then back ON again.
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