Buderus Logamax plus Installation Instructions Manual page 42

8 Operation
Service Mode menu
[1/2/0|
Step 1 Shows currently measured space heating water temperature in °F. Also see paragraph 13.3.
To activate service mode 1st step:
Step 2
Press and hold the
[1/2/0]
Step 3 The non-flashing dot is shown in the right-hand bottom corner of the display shows the boiler is now in
Flue gas test mode.
To activate service mode 2nd step:
Step 4
Simultaneously press and hold the
[l/?/?]
Step 5 Display shows the maximum capacity setting during heating mode in %. Also see paragraph 13.4.
[l/?/?]
In this case:
You can now adjust the boiler performance to partial load, i.e. to check the gas/air ratio or the ionization current.
Step 6 Press and hold the
for boilers at sea level
for boilers at high altitude
Step 7 For boilers at sea level (0-4000 ft):
[l/2/5]
Display setting: with a 80-kW boiler and
For boilers at high altitude (4000-10,000 ft):
[l/3/6]
Display setting: with a 80-kW boiler and
Minimum capacity setting during heating mode in %. Also see paragraph 13.4.
– The boiler will reduce its performance to 25 % or 20 % (sea level) or 36 % or 30 % (high altitude) respectively
within a couple of seconds.
– The space heating water temperature set on the BC10 basic controller (control panel) applies now.
– Check the gas/air ratio or the ionization current and if necessary set the gas/air ratio according to
paragraph 9.8 or paragraph 9.12.
e
Step 8 Press the button.
[f/\/5]
Step 9 This parameter shows the pump run-over time in minutes that starts when the heating mode has ended.
Also see paragraph 13.4.
Press the e button.
Step 10
Step 11 [c/\/1]
This parameter indicates the DHW mode status setting. Also see paragraph 13.4.
e
Step 12 Press the button.
Step 13 [1/2/0|
Shows currently measured space heating water temperature in °F. Also see paragraph 13.3.
Press the e button.
Step 14
Step 15 [p/2/2]
Shows currently measured system pressure in psi. Also see paragraph 13.3.
e
Step 16 Press the button.
Step 17 [-/a/\]
Display code: Operating phase: The boiler is in service mode. Also see paragraph 13.5.
Step 18 After 30 minutes or after a power interruption the flue gas test ends automatically. To end manually press and
d
hold the button for more than 2 seconds until the dot disappears.
Step 19 The boiler input rating drops to the preset capacity, see the "Settings" menu (table 10).
Table 9 Service mode
42 Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements!
d
button for more than 2 but not longer than 5 seconds.
d + e buttons for more than 2 seconds.
= 100 %. Service mode has been activated.
c
button until the display shows:
[l/2/5]
with a 80-kW boiler or
[l/3/6]
with a 80-kW boiler or
[l/2/0]
with a 100-kW boiler
[l/3/0]
with a 100-kW boiler.
[l/2/0]
with a 100-kW boiler.
[l/3/0]
with a 100-kW boiler.