3. Accept and Reset the fault.
If the PSU fault persists and
be replaced.
Control Panel Fitted with Interface Board, 1-44782-K085
1. Using a multi-meter measure the input power supply voltage at the Supply In terminals on the
Interface Board.
If the measured voltage is outside the limits 18 31.2v the power supply should be investigated.
2. Inspect the Interface Board in the Control Panel. Ensure that both switches of SW1 are in the on
position.
If the PSU fault persists the Interface Board should be replaced.
5.2.9 System Fault
A system fault is indicated if the Control Panel detects an error while accessing onboard memory or real
time clock.
Figure 149 System Fault
1. Accept and Reset the fault.
If the system fault persists the Main Control Processor Board should be replaced.
5.2.10 Continuous Backup Alarm
The backup alarm system is an additional safety feature to ensure a high oil mist level is indicated even
when the detector or Control Panel software has failed. The alarm is activated if the oil mist level rises
above a level of 1.6mg/l. As this level is higher than the Average or Deviation Alarm settings an alarm
condition will be indicated before the backup alarm level is reached.
A fault in the backup alarm system may cause a backup alarm to occur in the absence of either an
Average or Deviation Alarm. This will be indicated by the continuous sounding of the Control Panel
buzzer. In this situation pressing the accept key does not silence the buzzer.
1. Ensure that the Control Panel is operating normally, i.e. the LCD is not blank, and that there are no
communications faults indicated.
If the Control Panel display is blank stop all engines and check each for causes of high oil mist
levels when it is safe to do so.
If the Control Panel is indicating communications faults stop the engine with the fault and check
for causes of high oil mist levels when it is safe to do so.
2. Press Accept on the Control Panel.
3. Disconnect each of the Backup Alarm connections from the Interface Board terminals one at a
time.
If the buzzer stops sounding this identifies the engine associated with the fault, go to 5
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