Lowara GLS Série Instructions Pour L'installation, L'utilisation Et L'entretien page 27

7.1.2 Major inspection
In addition to the operations in section 7.1.1, follow this operations:
Component to be inspected
Motor shaft bearings
Mechanical seals
7.1.3 Change the oil
Change the oil at least once a year or when the oil is dirty. Depending on the electric pump model, 1 or 2 oil plugs are present
( section 10.10).
The oil chamber can be under pressure. Hold a rag over the oil plug to prevent oil from spraying out.
7.1.3.1 Version with 1 plug
Place the electric pump in an horizontal position with the oil plug facing upward. Unscrew the oil plug. Place a container under
the electric pump, turn the electric pump and drain all the oil.
Use medical white oil of paraffin type that fulfills FDA 172.878 (a) and viscosity close to VG32. Replace the O-ring of the oil
plug. Fill with oil (approximate quantity 0.6 liters). Screw and tighten the oil plug (tightening torque 10-40 Nm).
7.1.3.2 Version with 2 plugs
Place the electric pump in an horizontal position with the oil plug facing upward. Unscrew the oil plug. If the electric pump has a
hole marked "oil out", it's important to use this hole to drain the oil. Place a container under the electric pump and turn the
electric pump. Unscrew the other oil plug. If this hole is marked "oil in", raise the pump upright for a short period of time during
drainage in order to drain all the oil.
Use medical white oil of paraffin type that fulfills FDA 172.878 (a) and viscosity close to VG32. Replace the O-rings of the oil
plugs. Screw an oil plug in the hole that faces downwards or is marked "oil out", and tighten (tightening torque: 10-40 Nm). Fill
with oil through the hole on the opposite side or the hole marked "oil in". If the hole is marked "oil in", slightly tilt the electric
pump and lower it again in order to fill the electric pump with the correct oil quantity (approximate quantity 2 liters).
7.1.4 Checking the electric motor
If you have any doubts regarding the motor conditions, measure the isolation resistance to ground, which must exceed
Megaohm (MΩ). If you believe that there may be water inside the motor, please contact our Sales and Service Department.
7.1.5 Replacing the impeller
Please contact our Sales and Service Department.
7.1.6 Replacing the mechanical seals
Please contact our Sales and Service Department.
7.2 Customer service
Please contact our Sales and Service Department for any information or service you may require.
7.3 Spare parts
Always specify the exact electric pump type and identification code when requesting technical
WARNING
information or spare parts from our Sales and Service Department.
Use only original spare parts to replace any worn or faulty components. The use of unsuitable spare
parts may cause malfunctions, damage and injuries.
Please always refer to our Sales and Service Department for modifications on the electric pump or on the installation.
Refer to the diagrams in section 10.11.
8. Troubleshooting
PROBLEM
The electric pump does not start.
The main switch is on.
The electric pump starts up but the
thermal protector is immediately
Operation
Replace the bearings with new bearings.
Replace with new mechanical seals.
PROBABLE CAUSE
No power supply.
Triggering of thermal relay or motor
protector found in the electric control
panel.
Pump or auxiliary circuits protection
fuses blown.
Incorrect connection to capacitors
(single-phase version)
Triggering of start/stop device ( float).
Triggering of protection device against
dry running (float).
Triggering of motor thermal sensor
Electric motor failure.
Power supply cable is damaged.
Electric motor short circuit.
Information for users and maintenance personnel
POSSIBLE SOLUTION
Restore the power supply.
Reset the thermal protector.
Replace fuses.
Check the connections in the electric
panel
Check the water level in the tank. If
everything is in order, check the
protection device and its connection
cables.
Wait for the pump motor to cool down.
section 7.1.4
Contact our Sales and Service
Department.
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