Operation4
Logamax plus GB162-80 kW/100 kW - Subject to modifications resulting from technical improvements!
14
section 21 Service Mode menu
Step 1 [\/7/5| Display reading: Currently measured heating system supply temperature in °F.
See also section 27 "Display readings", page 21.
Step 2 Activate service mode? Yes:
→ Step 3
No:
→ Step 1
Step 3 To activate service mode, step 1:
Press and hold the "
d" button for more than 2 but not longer than 5 seconds.
Step 4
[\/7/5] Display reading: Currently measured heating system supply temperature in °F.
As soon as a non
-flashing dot is shown in the bottom right-hand corner of the display, the boiler will run in heating
mode at 100 % performance for a maximum of 30 minutes. The maximum heating system supply temperature set
on the control panel now applies. DHW mode is not possible during service mode operation.
Step 5 To activate service mode, step 2:
Press and hold the "
d"+ "e" buttons for more than 2 seconds.
Step 6
[l/?/?] Display setting: Maximum capacity setting during heating mode as a %.
See also section 28 "Display settings", page 21. In this case:
[l/?/?] = 100 %
Service mode has been activated. You can now temporarily lower the boiler performance to partial load to check -
and if relevant adjust- the gas/air ratio or the ionization current.
Step 7 Press and hold the "
c" button until the display shows for boilers at sea level [l/2/5] with a 80 kW boiler or
[l/2/0] with a 100 kW boiler.
Step 8
[l/2/0] or [l/2/5] Display setting: Minimum capacity setting during service mode as a %.
See also section 28 "Display settings", page 21.
Within a couple of seconds the boiler will be modulated back to 20 % of its capacity in case of an 80 kW boiler and
25 % in case of a 100 kW boiler. The maximum heating system supply temperature set on the control panel now
applies (section 1, [4]). Check the gas/air ratio or the ionization current and if necessary set the gas/air ratio
according to section section 119 "Measuring and adjusting the gas/air ratio", page 84 or section 104 "Measure the
ionization current", page 76.
Step 9 Press the "
e" button.
Step 10
[f/\5] Display setting: required pump run-over time after the end of the heating operation in minutes.
See also section 28 "Display settings", page 21.
Step 11 Press the "
e" button.
Step 12
[c/\1] Display setting: required DHW mode position (on/off).
This setting has priority over -for example- a possible DHW mode (On/Off) setting on a room thermostat.
See also section 28 "Display settings", page 21.
Step 13 Press the "
e" button.
Step 14
[\/7/5] Display reading: Currently measured heating system supply temperature in °F.
See also section 27 "Display readings", page 21.
Step 15 Press the "
e" button.
Step 16
[p/2/2| Display reading: Currently measured heating system water pressure in PSI.
See also section 27 "Display readings", page 21.
Step 17 Press the "
e" button.
Step 18
[-/a/\] Operating code: The boiler is in service mode.
See also section 29 "Display codes and other symptoms", page 21, and further.
Step 19 Press the "
e" button.
Step 20
[\/7/5] Display reading: Currently measured heating system supply temperature in °F.
See also section 27 "Display readings", page 21.
Step 21 Have 30 minutes passed or has the main voltage been interrupted? Yes:
→ Step 22
No:
→ Step 23
Step 22 Service mode is deactivated.
→ Step 25
Step 23 Deactivate service mode? Yes:
→ Step 24
No:
→ Step 15
Step 24 To deactivate the service mode:
Press and hold the "
d" button for more than 2 seconds until the dot disappears.
Step 25 The boiler performance is then reduced according to the settings made in the "Settings" menu
in section 23,
page 15.
→ Step 1
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