BUSCH COBRA - Machine Performance Issues

Troubleshooting | 12
Instruction Manual COBRA NC 2500 B WCV_EN_en 43 | 52
Problem Possible Cause Remedy
The machine does not reach
the usual pressure on the suc-
tion connection.
Suction or discharge lines too
long or section diameter too
small.
● Use larger diameter or
shorter lines.
● Seek advice from your local
Busch representative.
Process deposits on the pump-
ing components
● Flush the machine.
If an inlet screen or an inlet fil-
ter is installed, it can be partial-
ly clogged.
● Clean the inlet screen or re-
place the inlet filter car-
tridge.
The machine runs in the wrong
direction.
● Check the direction of rota-
tion, see Wiring Diagram
Three-Phase Motor (Pump
Drive) [➔21].
Internal parts are worn or
damaged.
● Repair the machine (contact
Busch).
The machine runs very noisily. Wrong oil quantity or unsuit-
able oil type.
● Use one of the recommend-
ed oils in the correct quanti-
ty, see Oil [➔46].
Defective gears, bearings or
coupling element.
● Repair machine (contact
Busch).
The machine runs too hot. Insufficient cooling. ● Make sure to comply with
the cooling water require-
ments, see Cooling Water
Connection [➔14].
Ambient temperature too high. ● Observe the permitted am-
bient temperature, see
Technical Data.
Temperature of the process
gases at the inlet too high.
● Observe the permitted gas
inlet temperature, see Tech-
nical Data.
The cooling water pump is de-
fective.
● Repair the machine.
Oil level too low. ● Top up oil.
The oil is black. Oil change intervals are too
long.
● Drain the oil and fill in new
oil, see Oil Change [➔31].
The machine runs too hot. ● See problem "The machine
runs too hot".
For resolution of problems not listed in the troubleshooting table, please contact your Busch repre-
sentative.