6 720 607 909
32
Maintenance and service
Parameter storage
B Keep pressing the reset button for at least 2
seconds in order to record adjustments. The digital
display blinks with the symbol .
Exiting Diagnostic mode
B Press ON/OFF button to turn appliance OFF and
then back ON again.
Mode Parameter Values
01 Not used ---------- (displayed values have no relevance)
02 Not used ---------- (displayed values have no relevance)
03 Error code history
Displays the last 8 error codes. Use the hot water temperature selector
(right dial) to toggle from newest (left) to oldest (right) error codes.
04 Outlet water temperature Displays the real-time outlet temperature as detected by the outlet
temperature sensor.
05 Selected outlet water
temperature
Displays the outlet water temperature as selected by the user during
normal operation.
06
DHW temperature (only if
12kOhm thermistor used)
Displays the real-time temperature of the DHW tank as detected by the
12kOhm external thermistor. (Display will show 32 if thermistor not
used)
07
Selected DHW temperature
(only if 12kOhm thermistor
used)
Displays the domestic hot water temperature as selected by the user (only if
12kOhm external thermistor used).
08 Not used ---------- (displayed values have no relevance)
09 Pressure switch
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
10 Temperature limiter 01 - temperature is below the limit (220°F)
E9 - temperature is above the limit (220°F)
11 Not used ---------- (displayed values have no relevance)
12 Gas valve
00 - gas valve closed
01 - gas valve open
13
Modulating gas valve
position (%)
00 - gas valve closed
01-70 - gas valve position min/max
14 Thermostat
00 - thermostat open
01 - thermostat closed
15 Fan
00 - fan off
01 - fan on
16 Ionization
00 - no flame detected
01 - flame detected
17 Not Used ---------- (displayed values have no relevance)
18 Not Used ---------- (displayed values have no relevance)
19 Not Used ---------- (displayed values have no relevance)
20 Not Used ---------- (displayed values have no relevance)
21 Digital display test All LCD components appear
22 Temperature unit selection
(°C or °F)
Use the hot water temperature selection knob to select temperature
units °C or °F. (ccw for °C and cw for °F)
Table 16
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