Fault Finding - Grundfos IO 112 Manual Del Usuario

13. Fault finding

Installation faults
Check the DIP switch settings:
• Sensor type, switches 1 and 2.
• Raising/falling, switches 3, 4 and 5.
• Communication address, switches 8, 9 and 10.
Operational faults
Fault
The AI indicator light is on.
AI
No alarm when limit has
been passed.
The PT indicator light is on.
PT
No alarm when limit has
been passed.
The CNT indicator light is on.
CNT
The CNT indicator light and
all value lights are on.
The counter is not working.
The pump status indicator
light is not on when the pump
is running.
The alarm relay is open even
when no alarm is shown.
No alarm reset after fault.
14
Cause
An alarm has been registered.
The 4-20 mA sensor is defective.
The alarm limit is not correct.
The limit is not set correctly (rising/
falling).
An alarm has been registered.
The alarm limit is not correct.
The Pt1000 sensor is defective.
The limit is not set correctly (rising/
falling).
An alarm has been registered.
The alarm limit is not correct.
The counter has reached its maxi-
mum value.
The counter is set to counting down
(falling).
The jumper or the contactor feed-
back wires are not connected cor-
rectly to terminals K1 and K2.
The jumper between P1 and P2 is
missing or incorrectly connected.
The jumper between R1 and R2 is
missing or incorrectly connected.
Remedy
Press the Reset button for less
than 3 seconds.
Replace the sensor.
Check the potentiometer.
Check switch 3.
Press the Reset button for less
than 3 seconds.
Check the potentiometer.
Replace the sensor.
Check switch 4.
Press the Reset button for less
than 3 seconds.
Check the potentiometer.
Press the Reset button for more
than 3 seconds.
Set switch 5 to ON (up).
Check the jumper between K1
and K2 or the contactor feed-
back connection.
Check or connect the jumper.
Check or connect the jumper.