19 Errors & Lockouts
Mk8 MM Manual Page | 386
Multi-Burner Config (Fuel
Index)
Same fuel number must be selected on all MMs in multi-burner
loop
• Check which fuel is selected on all MMs in multi-burner loop
• Check wiring on terminals 89, 90, 91 and 92
Multi-Burner Config (Fuel Type)
Fuel type is not the same for all MMs in multi-burner loop
•
Check option/parameters 150 – 153 on all MMs in multi-burner loop
Multi-Burner Config (Pilot Type)
Pilot type not the same for all MMs multi-burner loop
• Alarm
• Check option/parameter 111 on all MMs in multi-burner loop
Multi-Burner Config (Load
Sensor)
Load sensor not set the same for all MMs in multi-burner loop
• Alarm
• Check option 1 on all MMs in multi-burner loop
Multi-Burner Differential Firing
Rate
Slave MM firing rate differs from the Master MM firing rate by
1.5x the Differential Firing Rate Limit (Option 52) value
• Check modulation speed of the slave MMs
Less than 3mA signal received from fuel flow meter
• Alarm or warning depending on expansion option 152 (if set to warning, the MM will use the
commissioned value without any fuel or air servomotor adjustment)
• Check wiring and screen on terminal MF and F-
Less than 3mA signal received from air flow meter
• Alarm or warning depending on expansion option 152 (if set to warning, the MM will use the
commissioned value without any fuel or air servomotor adjustment)
• Check wiring and screen on terminal EX+ and EX-
Fuel Temperature Sensor Fault
(T2)
Fault or no comms with T2 sensor
• Warning (MM will use commissioned temperature)
• Check wiring and screen on terminals – and T2
Air Temp Sensor Fault (T3)
Fault or no comms with T3 sensor
• Warning (MM will use commissioned temperature)
• Check wiring and screen on terminals – and T3
Fuel Pressure Sensor Fault
Fault or no comms with fuel pressure sensor
• Warning or lockout if VPS and/or pressure limits enabled in option/parameters 125 – 128 (if warning,
MM uses commissioned pressure)
• Check wiring and screen on terminals 31 – 34
Air Pressure Sensor Fault
Fault or no comms with air pressure sensor
• Warning/Lockout –option 148
• Check wiring and screen on terminals 31 – 34
• Lockout if option 148 is set for air pressure sensor in flame safeguard
Fully Metered Air Adjustment
Failure
Air adjustment has reached limit and fuel-air ratio still not met
• Alarm/Warning – exp option 151
• Check for changes affecting combustion including fuel/air pressure, temperature etc.
• Warning if expansion option 151 is set to 1
• Warning and air adjustment is disabled if expansion option 151 is set to 2
Servo Control I/O Unit
Communications Fault
Fault or no comms with the servo control IO module
• Check for wiring on terminals 6T+ and 6T-
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