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Mode
Parameter
01
Not used
02
Not used
03
Error code history
04
Actual primary circuit
temperature
05
Selected primary circuit
temperature
06
Actual 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
13
Modulating gas valve
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
Table 15
Parameter storage
B Keep pressing the reset button
seconds in order to record adjustments. The digital
display blinks with the symbol
6 720 607 909
Values
----------
----------
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 actual temperature in the primary circuit as detected by
the internal heating circuit sensor.
Displays the recirculating water temperature (primary) as selected
by the user during normal operation.
Displays the actual temperature of the DHW tank as detected by
the 12kOhm external thermistor
Displays the hot water temperature as selected by the user during non-
diagnostic mode operation (only if 12kOhm external thermistor used).
----------
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 (180 F)
E9 - temperature is above the limit (180F)
----------
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
----------
----------
----------
----------
All LCD components appear
Use the hot water temperature selection knob to select temperature
units °C or °F.
Exiting service mode
B Press ON/OFF button to turn appliance OFF and
for at least 2
.
Maintenance and service
then back ON again.
If the appliance is not powered off and
i
then back on again, it returns to normal
working conditions after 5 minutes.
31
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