General Overhaul; Troubleshooting And Possible Solutions; Fault: The Unit Will Not Start; Fault: The Unit Starts, But The Motor Protection Switch Triggers Shortly After Start-Up - salmson Rocsan lix Manuel D'installation Et Mise En Service

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8.3.7. Functional test of safety and monitoring devices
Monitoring devices include temperature sensors in the motor,
sealed volume monitors, motor protection relays, over-voltage
relays, etc.
• Motor protection relays, over-voltage relays and other
tripping devices can generally be triggered manually for
test purposes.
• To inspect the sealing room monitor or the temperature
sensor, the unit must be cooled to ambient temperature
and the electrical supply cable of the monitoring device in
the switch cabinet must be disconnected. The monitoring
device is then tested with an ohmmeter. The following
values should be measured:
• Bi-metal sensor: Value = "0" throughput
• Moisture sensor: This value must tend towards infini-
ty. If there is a low value, there is water in the oil. Also
observe the instructions of the optionally available
evaluation relay.
In the case of larger deviations, please consult the
manufacturer.
8.3.8. Checking the switching devices/relays in use
Please see the particular operating manual for the procedure
for checking the switching devices/relays being used. Defective
devices must be replaced immediately because they cannot guar-
antee safe operation of the product.
8.3.9. Changing the oil in the oil separation chamber
The same opening is used to empty and fill the oil separation
chamber.
BEWARE of injuries from hot and/or pressurized
lubricants!
After the unit is switched off, the oil is still hot and
under pressure. This can force out the plug, causing
hot oil to escape. Beware of injuries or burns! Let
the oil cool down to ambient temperature first.
Fig. 7.: Plugs
1 Plug
1. Lay the unit horizontally on a firm surface with the plug
facing upwards.
Make sure that the unit cannot fall over and/or slip
away.
2. Slowly and carefully remove the plug.
Caution: The lubricant may be pressurized. This can
force the plug out.
3. Drain off lubricant by turning the unit until the opening
faces downwards. Collect the lubricant in a suitable con-
tainer and dispose of according to the requirements in the
"Disposal" section.
4. Turn the unit back until the opening is facing upwards
again.
5. Fill the new lubricant by means of the opening in the plug.
The oil must reach to about 1 cm below the opening.
Comply with the specified lubricants and filling quantities.
6. Clean the plug, fit with a new sealing ring and screw it in
again.

8.3.10. General overhaul

During a general overhaul, the bearings, shaft seals, O rings and
power supply cables are inspected and replaced as required in
addition to normal maintenance work. This work may only be con-
ducted by the manufacturer or an authorized service workshop.
9.

Troubleshooting and possible solutions

In order to prevent damage or injury while rectifying product
faults, the following points must be observed in all cases:
• Only attempt to rectify a fault if you have qualified staff.
This means that each job must be carried out by trained
specialist staff. For example, electrical work must be per-
formed by a trained electrician.
• Always secure the product against an accidental restart
by disconnecting it from the mains. Take appropriate
safety precautions.
• Always have a second person on hand to ensure that the
product has been switched off for safety.
• Secure moving parts to prevent injury.
• Unsanctioned changes to the product are made at the
operator's own risk and release the manufacturer from
any warranty obligations.
9.1.

Fault: The unit will not start

1. Electricity supply interrupted, short circuit or earth fault in
the cable or motor windings
• Have the motor and wires checked by a specialist and
replaced if necessary
2. Fuses, the motor protection switch and/or monitoring
devices are triggered
• Have a specialist inspect the connections and correct
them as necessary.
• Have the motor protection switches and fuses installed
or adjusted according to the technical specifications,
and reset monitoring equipment.
• Check that the impeller runs smoothly. Clean or free it
as necessary
3. The moisture sensors (optional) have interrupted the pow-
er circuit (operator-related)
• See fault: Mechanical shaft seal leak, moisture sensors
report a fault or shut down the unit
9.2. Fault: The unit starts, but the motor protection switch
triggers shortly after start-up
1. The thermal trigger on the motor protection switch is
incorrectly set
• Have a specialist compare the setting of the trigger with
the technical specifications and correct it as necessary
2. Increased power consumption due to major voltage drop
• Have an electrician check the voltage on each phase and
rewire if necessary
3. Two-phase operation
• Have a specialist inspect the connection and correct it
as necessary
4. Excessive voltage differences on the three phases
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