Troubleshooting | 12
Instruction Manual DOLPHIN LG 0890-2680 A, LR 0700-2200 A_EN_en
29 | 40
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.
The operating liquid is too
warm or insufficient operating
liquid.
(the characteristic curves are
based on 15°C warm water as
operating liquid, with higher
temperatures the achieved
pressure and the flow rate de-
teriorate)
●
Reduce the temperature of
the operating liquid or ad-
just the flow of operating
liquid.
The mechanical seal leaks.
●
Repair the machine (contact
Busch).
Partial clogging in the suction,
discharge or pressure line.
●
Remove the blockage.
If an inlet screen is installed, it
can be partially clogged.
●
Clean the inlet screen.
Internal parts are worn or
damaged.
●
Repair the machine (contact
Busch).
Excessive leakage from the
gland packing.
●
Tighten the packing gland
Speed low due to slippage of
the belt.
●
Tighten the belt.
Heavy lime deposits in the
pump.
●
Remove the lime deposit.
Leakage occurring in the sys-
tem.
●
Check the joints are sealed
sufficiently.
Excessive clearance in the
pump due to corrosion or cor-
rosive substances in the medi-
um.
●
Clean the medium prevent-
ing solids from entering and
replace the worn parts.
Axial clearance not conforming
with the requirements follow-
ing a repair.
●
Recalibrate the axial clear-
ance.
