Control Cabinet Of Fuel Treatment System - Troubleshooting - MTU 20V4000M93 series Operating Instructions Manual

6 Troubleshooting
6.1 Control cabinet of fuel treatment system – Troubleshooting
Water alarm
Cause
When the maximum water level is
reached, the water level electrode
opens the water drain valve and
water is discharged. If the opening
period of the valve exceeds a
preset limit (4 minutes), the pump
will switch off and an alarm is
initiated.
Pump fault
Cause
The drive motor is equipped with
an overload protection. If the
maximum permissible current
consumption is exceeded, e.g. in
case of a blockage or dry-running,
the motor protection relay
triggers and the pump is switched
off.
Pre-alarm
Cause
The differential pressure
exceeded 1.3 bar.
Replace filter element
Cause
The max. permissible differential
pressure exceeded 1.5 bar. If the
coalescer filter element is not
replaced, pressure will increase
further and the safety valve will
open. Fuel will be led via the
bypass directly into the overflow
tank.
96 | Troubleshooting | MS150048/05E 2018-03
Corrective action
1. Press illuminated pushbutton 'Water alarm' for acknowledgment.
2. In addition to the automatic water drain function, water can also be
drained manually: Press illuminated pushbutton 'Water drain'.
The water drain valve opens.
Corrective action
u Reset motor protection relay.
Corrective action
u Replace coalescer filter element (→ Page 242).
Corrective action
1. Replace coalescer filter element (→ Page 242).
2. Press illuminated pushbutton 'Water alarm' for acknowledgment.