19 Errors & Lockouts
Mk8 MM Manual Page | 383
Second Low Probe
Communications Fault
No comms with second low probe
• Alarm
• Check wiring and screen on terminals 5T+, 5T-, 4P- and 4P+
Second Low Probe Hardware
Fault
• Alarm
• Contact Autoflame approved local tech centre
Input held on test terminal for more than 60 seconds
• Alarm
• Check input on terminal TST
Second Low Probe Detected
But Not Optioned
Second low probe connected but not optioned
• Check expansion option 6
• Check wiring on terminals 5T+, 5T-, 4P- and 4P+
Aux WL Inputs Detect But Not
Optioned
Mains detected on auxiliary WL inputs but not optioned
• Check expansion option 5
• Check wiring on terminals HAI, 1AI and 2AI
Feed Water Servo Position
Error
Servomotor is outside of the commissioned range
• Alarm or warning or depending on expansion option 20 (if set to warning, feed water pump will continue
to operate as normal)
• 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
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
Probes/sensor detect water level above commissioned high
water
•
Alarm or warning depending on expansion option 9
• Check water level reading
Probes/sensor detect water level above set pre-high water
• Check water level reading
• Check expansion option 7
Probes/sensor detect water level below set pre-1
st
low
• Check water level reading
• Check expansion option 8
Probes/sensor detect water level below commissioned 1
st
low
• Check water level reading
st
low alarm will automatically clear if water level increases above 1
st
Probes/sensor detect water level below 2
nd
low
• Check water level reading
• 2
nd
low alarm requires manual reset
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