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With a boiler defect leading to a lock-out on the LMU controller
the alarm signal is displayed against the defect indicator.
To re-set the LMU controller, clear the defect then press the re-set button for 2 seconds
Defects Indicator
Explanation
0
10 Faulty outside sensor
20 Faulty boiler flow sensor
28 Faulty flue gas sensor
32 Faulty clip-in sensor
40 Faulty boiler return sensor
50 Faulty DHW sensor
61 Weather compensation - incorrect setting
62 weather compensation or timeswitch error
81 Short - circuit on LPB or connection error of terminals
82 Cross connecting of terminals on LPB
91 Loss error in EEPROM
92 Error in electrical circuity
100 Two clock addresses in the system
105 Boiler maintenance required
110 Lock-out of electrical settings
111 Lock-out of limit thermostat
113 Over-run of flue gas temperature
128 Failure of burner flame
129 Lack of combustion air
130 Restriction of boiler output due to excessive flue gas temperature
133
Flame failure
140 LPB in error or in connection
148 LPB and LMU not compatible
151 Defect in LMU
152 Setting error in LMU
153 Boiler in lock-out condition
154 error in general range of settings
160 Incorrect low minimum setting of boiler fan
161 Incorrect high maximum setting of boiler fan
162 Air pressure switch lock-out
164 Low water flow pressure differential switch
166 Air pressure switch not satisfied
180 Boiler requires a service
181 Boiler regulator requires adjustment
183 Boiler locked in parameter settings
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