Grundfos CU 301 Manuel D'instructions page 12

4. Position of LEDs
Fig. 14 Position of the LEDs inside the CU 301
Pos. Indication
1 +24 V overload
2 +24 V
3 +10 V
4 +5 V
9 indicator lights:
Control indicator
Min. speed
Max. speed
Sensor defective *)
Overload *)
5
Overtemperature *)
Speed reduction *)
Voltage alarm *)
No contact to pump *)
*) Press the On/Off button to reset the alarm indication.
12
Description
Permanent red light when the internal 24 VDC supply is overloaded.
Permanent green light when the internal 24 VDC supply is OK.
Permanent green light when the internal 10 VDC supply is OK.
Permanent green light when the internal 5 VDC supply is OK.
Flashing green light when the pump control is working correctly.
Permanent yellow light when the pump is running at minimum speed,
3,000 rpm.
Permanent yellow light when the pump is running at maximum speed,
10,700 rpm.
Permanent red light when the sensor signal is out of signal range.
Permanent red light when the motor load exceeds the stop limit,
see section 8. Technical data.
Permanent red light when the motor temperature exceeds the stop limit,
see section 8. Technical data.
Permanent red light when the pump speed is reduced,
see section 8. Technical data.
Permanent red light when the supply voltage is out of range, see section
8. Technical data.
Permanent red light when communication between the CU 301 and the
pump is impossible.
1
2
3
4
5