11 Top Blowdown
Mk8 MM Manual Page | 220
11.9 Faults
The table below show the faults which are directly related to the top blowdown function.
Top Blowdown Sensor Communications
Fault
No comms with the top blowdown sensor
•
Check wiring and screen on terminals 3P+, 3P-, 3T+ and 3T-
Top Blowdown Servo Position Error
Servomotor is outside of the commissioned
range
• Check wiring on terminals P-, TW, P+ and TBI, TBD
• Check signal cable form the MM to the servomotor is screened at one end
• Check that the servomotor is zeroed correctly
Top Blowdown Servo Movement Error
Servomotor moves when not expected and
vice versa
• Check wiring on terminals TBI and TBD
• Check servomotor drives in correct direction
• Check top blowdown valve is not stuck
Top Blowdown Reading High
TDS value detected too high
• Check expansion option 46 and TDS value
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