12.5 F117
•
The red LED is flashing.
•
The buzzer and the alarm symbol are on.
•
Display text:
F117
.
Cause
Remedy
The cable between the main board and the display is not con-
nected properly.
Disconnect and reconnect the
cable.
The cable between the main board and the display is not con-
nected properly or is defective.
Replace the cable.
Use an ethernet cable, RJ45.
The problem is still not solved.
The connectors between the main board and the display may
be defective.
Contact the nearest Grundfos
sales company.
12.6 RELAY
•
The red LED is flashing.
•
The buzzer and the alarm symbol are on.
•
Display text:
RELAY
.
•
The pump does not start or stop.
•
The symbol of the pump is flashing.
Find the cause of the alarm by means of the fault code in the information menu
F_01
.
Fault
code
Cause
Remedy
F015
The relay or contactor for pump 1 is defective. The pump does not stop.
Solution 1
F017
The relay or contactor for pump 2 is defective. The pump does not stop.
F016
The relay or contactor for pump 1 does not close. The pump does not start.
The motor-protective circuit breaker has tripped, or the main board is de-
fective.
Solution 2
F018
The relay or contactor for pump 2 does not close. The pump does not start.
The motor-protective circuit breaker has tripped, or the main board is de-
fective.
Solution 1
1. Switch off the power supply to stop the pump.
2. Replace the defective relay or contactor.
Solution 2
1. Reset the motor-protective circuit breaker.
2. Start the pump manually and make sure that it is running.
3. If resetting the motor-protective circuit breaker does not solve the problem, contact the near-
est Grundfos sales company.
Multilift MD1, MDV | Fault finding the product|
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