13
14.1 Instruments not allowed
Note:
The use of the following instruments is not al-
lowed during troubleshooting.
Fig. 13
Instruments not allowed
Note:
When measuring, use RMS instruments.
15. Checking of motor and cable
16. Environment
During handling, operation, storage and transport, all
environment regulations dealing with the handling of
hazardous materials must be observed.
17. Disposal
Disposal of this product or parts of it must be carried
out according to the following guidelines:
1. Use the local public or private waste collection ser-
vice.
2. If such waste collection service does not exist or
cannot handle the materials used in the product,
please deliver the product or any hazardous mate-
rials from it to your nearest Grundfos company or
service center.
TM
0
1 2
0
72
10
9
8
Insulation
test
Resistance
test
High-voltage
test
M
V
1. Supply voltage
TM
0
0
137
1 50
92
Measure the voltage L1 (RMS)
between phase and L2.
Connect the voltmeter to the
terminals at the connections.
The voltage should, when the motor is
loaded, be within the range specified in sec-
tion
4. Electrical connection
.
Large variations in supply voltage indicate
poor electricity supply, and the pump should
be stopped until the problem has been cor-
rected.
2. Current consumption
TM
0
0
1
3
72
5
0
8
2
Measure the current (RMS)
while the pump is operating at
a constant discharge head
(if possible, at the capacity
where the motor is most
heavily loaded).
For maximum current, see mo-
tor nameplate.
If the current exceeds the full-load current,
there are the following possible faults:
• Poor connection in the leads, possibly in
the cable joint.
• Too low supply voltage, see item 1.
L
N
PE
When the pump is taken out of operation,
it must be ensured that no hazardous ma-
terial is left in the pump and in the riser
pipe, which can be injurious to persons and
the environment.
