VAF instruments OILCON MARK 6M - Power Supply Problems; MCU Power Failure; Electro Pneumatic Unit Power Failure

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15.6 POWER SUPPLY PROBLEMS
15.6.1 MCU Power failure
Probable causes Action
1
24 VDC power failure

Check if the isolator for the single phase supply is ON.
 Check if the power to the MCU is switched ON.
2
Emergency power failure

Check if the emergency power is switched ON.
15.6.2 Electro Pneumatic Unit power failure
Probable causes Action
1
Single phase power failure.

Check if the isolator for the single phase supply is ON.
 Check the fuse inside the cover of the EPU, fuse 1 AF
(fast).
2
Power supply unit failure.

Check the power supply unit in the EPU.
 Check the fuse of the power supply unit in the EPU.
NOTE:
To check the fuse, remove the front panel from the EPU. The fuse is located on the
back face of the front panel. if problems remain the power supply should be replaced
with a spare one and shipped to VAF Instruments for repair.