6 Troubleshooting
6.1 Fuel treatment system – Troubleshooting
Illuminated pushbutton “Water alarm” is lit.
Cause
Corrective action
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.
1. Press illuminated pushbutton “Water alarm” to acknowledge.
2. In addition to the automatic water drain function, water can also be
drained manually. To do so, press the illuminated pushbutton
“Water drain” to open the drain valve.
Signal lamp “Pump fault” is lit.
Cause
Corrective action
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.
u
Reset motor protection relay.
Signal lamp “Warning filter” is lit.
Cause
Corrective action
The differential pressure
exceeded 1.3 bar.
u
Replace coalescer filter element (→ Page 230).
Illuminated pushbutton “Replace filter element” is lit.
Cause
Corrective action
The max. permissible differential
pressure of 1.5 bar was exceeded.
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.
1. Replace coalescer filter element (→ Page 230).
2. Press illuminated pushbutton “Replace filter element” to
acknowledge.
MS150047/05E 2018-08
| Troubleshooting | 115
TIM-ID: 0000031170 - 001
Summary of Contents for 12V4000M93 series
Page 1: ...Operating Instructions Diesel engine 12V4000M93x 16V4000M93x MS150047 05E...
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