Position Of Leds And Fuse - Grundfos CU 301 Installer Manual

4. Position of LEDs and fuse

Fig. 14
Pos. Indication
1 +24 V overload
2 +24 V
3 +10 V
4 +5 V
5 9 indicator lights:
• Control indicator
• Min. speed
• Max. speed
• Sensor defective *)
• Overload *)
• Overtemperature *)
• Speed reduction *)
• Voltage alarm *)
• No contact to pump *)
*) Press the on/off button to reset the alarm indication.
10
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,
-1
3,000 min .
• Permanent yellow light when the pump is running at maximum
-1
speed, 10,700 min
• 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 7. Technical data.
• Permanent red light when the motor temperature exceeds the stop
limit, see section 7. Technical data.
• Permanent red light when the pump speed is reduced, see section
7. Technical data.
• Permanent red light when the supply voltage is out of range, see
section 7. Technical data.
• Permanent red light when communication between the CU 301 and
the pump is impossible.
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