AUTOFLAME Mk8 MM Installation And Commissioning Guide

10 Fully Metered Combustion Control
04.09.2016 Mk8 MM Expansion Features Installation and Set-Up Guide Page 153
10.4 Faults
The table below show the faults which are directly related to the fully metered combustion control
function. For the full list of faults including errors, lockouts, alarms, warnings, setting conflicts and
forced commission reasons, please see section 4 in the Mk8 MM Installation and Commissioning
Guide.
Fault Message Description Type
550 Fuel Flow Meter Fault Less than 3mA signal received Alarm/Warning –
exp option 152
 Check wiring and screen on terminal MF and F-
 Warning if expansion option 152 is set to 1 and MM will then use the commissioned value
without any fuel or air servomotor adjustment
551 Air Flow Meter Fault Less than 3mA signal received Alarm/Warning –
exp option 152
 Check wiring and screen on terminal EX+ and EX-
 Warning if expansion option 152 is set to 1 and MM will then use the commissioned value
without any fuel or air servomotor adjustment
552 Fuel Temperature Sensor
Fault (T2)
Fault or no comms with T2 sensor Warning
 Check wiring and screen on terminals – and T2
 Warning – MM uses commissioned temperature
553 Air Temperature Sensor Fault
(T3)
Fault or no comms with T3 sensor Warning
 Check wiring and screen on terminals – and T3
 Warning – MM uses commissioned temperature
554 Fuel Pressure Sensor Fault Fault or no comms with fuel pressure
sensor
Warning/ Lockout
– option 125 (fuel)
 Check wiring and screen on terminals 31 – 34
 If warning generated, MM will use commissioned value
 Lockout if option 125/126/126/128 is set for VPS or high/low pressure limits in flame
safeguard
555 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
560 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

AUTOFLAME Mk8 MM Specifications

General

Brand	AUTOFLAME
Model	Mk8 MM
Category	Controller
Language	English