Fault Message Description Type
123 Second Low Probe
Communications Fault
No comms with second low probe
Alarm
Check wiring and screen on terminals 5T+, 5T-, 4P- and 4P+
124 Second Low Probe Hardware
Fault
Internal check failed
Alarm
Contact Autoflame approved local tech centre
125 Permanent Test Input Input held on test terminal for more than 60 seconds
Alarm
Check input on terminal TST
126 Second Low Probe Detected
But Not Optioned
Second low probe connected but not optioned
Alarm
Check expansion option 6
Check wiring on terminals 5T+, 5T-, 4P- and 4P+
127 Aux WL Inputs Detect But Not
Optioned
Mains detected on auxiliary WL inputs but not optioned
Alarm
Check expansion option 5
Check wiring on terminals HAI, 1AI and 2AI
130 Feed Water Servo Position
Error
Servomotor is outside of the commissioned range
Alarm or warning or depending on expansion option 20
Check wiring on terminals P-, FW and P+
Check signal cable form the MM to the servomotor is screened at one end
Check that the servomotor is zeroed correctly
131 Feed Water Servo Movement
Error
Servomotor moves when not expected and vice versa
Alarm or warning depending on expansion option 20
Check wiring and voltages on terminals MVI and MVD
Check servomotor drives in correct direction
Check feed water valve is not stuck
150 High Water Probes/sensor detect water level above commissioned high
water
Alarm or warning depending on expansion option 9
Check water level reading
151 Pre-High Water Probes/sensor detect water level above set pre-high water
Warning
Check water level reading
Check expansion option 7
152 Pre-1
st
Low Probes/sensor detect water level below set pre-1
st
low
Warning
Check water level reading
Check expansion option 8
153 1
st
Low Probes/sensor detect water level below commissioned 1
st
low
Alarm
Check water level reading
1
st
low alarm will automatically clear if water level increases above 1
st
low
22.05.2017 Mk8 MM End User Guide Page 52
4 Errors and Lockouts
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