Grundfos MGE F, Service Instructions Manual

Page: 13 / 32

English (GB)
13
On Off
3. The pump is running at
unexpectedly high or low
speed.
– Can be caused by fault in
installation, setting or
signal from setpoint/sensor
or that the sensor input
has been set to "active".
a) Has the correct setpoint type been set in the motor? (0-10 V, 0-20 mA,
4-20 mA).
NO:
YES:
Correct the setting using Grundfos GO Remote or PC-Tool
E-products.
Proceed to point b).
b) Has the external setpoint signal from potentiometer or external
controller been connected correctly?
TM
02
16
0
6
16
01
NO:
YES: Connect the setpoint signal correctly.
Proceed to point c).
c) Has the correct sensor type been set in the motor? (0-10 V, 0-20 mA,
4-20 mA)
NO:
YES:
Correct the setting using Grundfos GO Remote or PC-Tool
E-products.
Proceed to point d).
d) Has the sensor been connected correctly, and does the sensor signal
correspond to the system pressure?
TM
02
16
0
4
06
01
TM
04
20
7
2
19
08
NO:
YES:
Connect the sensor signal correctly.
If the pump does not run correctly, replace the I/O module
or the terminal box.
If the sensor is defective, replace it.
Off Off
The pump is not running
1. The power supply to the
motor has been cut.
Re-establish correct power supply.
2. The control panel or one of
the functional modules is
defective.
Switch off the power supply. Then remove the control panel and the
functional modules, one at a time, and switch on the power supply every
time a component has been removed. When the fault has disappeared
after switching on the power supply, the defective component has been
localised and can be replaced.
3. The terminal box is
defective.
Replace the terminal box, or contact Grundfos Service.
Indicator lights
Condition/cause Remedy
Green Red
0-10V
+
-
0/4-20mA
10K
4: SETPOINT
5: +10V
6: GND
7: SENSOR INPUT
8: +24V
9: GND
4-20mA
+ OUT
0-10V
0/4-20mA
- +OUT
G U
12: ANALOG OUTPUT
13: GND
14: SENSOR INPUT 2
15: +24V (2)
16: GND
0-
10
V
0/
4-
20m
A