Fault Finding - Grundfos PC Tool Link Montage- Und Betriebsanleitung

6. Fault finding

Problem
1 Communication has been established. The green
LED goes out after a long time without
communication.
PC
Data
USB
2 None of the yellow LEDs are on. The product-
specific cable is connected.
PC
Data
USB
3 Communication has not been established. None of
the red LEDs are flashing.
PC
Data
USB
4 Communication has not been established. The red
LED (pos. 1) is off, and the red LED (pos. 2) is
flashing.
1
PC
Data
USB
5 Communication has not been established. Two red
LEDs (pos. 1 and 2) are off, and two red LEDs
(pos. 3 and 4) are flashing.
1
PC
Data
USB
3
10
Possible cause
• The PC has suspended the PC Tool
Link for power saving.
• The PC is in standby mode.
PC Tool Link
Grundfos Unit
Data RS232
TTL
GENIbus
(RS485)
Power
• The product-specific cable is
defective.
• The PC Tool Link is defective.
PC Tool Link
• The 5-volt output from the Grundfos
Grundfos Unit product is missing.
Data RS232
TTL
GENIbus
(RS485)
Power
• The PC is not transmitting.
PC Tool Link
Grundfos Unit
Data RS232
TTL
GENIbus
(RS485)
Power
• The PC Tool Link is defective.
2
PC Tool Link
Grundfos Unit
Data RS232
TTL
GENIbus
(RS485)
Power
• The Grundfos product is not
responding.
2
PC Tool Link
Grundfos Unit
Data RS232
TTL
GENIbus
(RS485)
Power
4
Suggested action
• Resume normal PC mode.
• Check that the product-specific
cable has been connected to the
product and that the product has
been switched on.
• Send the PC Tool Link with cables
to Grundfos for service.
• Check the COM port settings for
the PC Tool Link.
• Send the PC Tool Link to Grundfos
for service.
• Check that the product has been
switched on.
• Check the product-specific cable.
• Check the configuration of the
product-specific PC tool.