10
4. Position of LEDs and fuse
Fig. 14
TM01 8537 1703
1
2
3
4
5
Pos. Indication Description
1 +24 V overload Permanent red light when the internal 24 VDC supply is overloaded.
2 +24 V Permanent green light when the internal 24 VDC supply is OK.
3 +10 V Permanent green light when the internal 10 VDC supply is OK.
4 +5 V Permanent green light when the internal 5 VDC supply is OK.
5 9 indicator lights:
• Control indicator • Flashing green light when the pump control is working correctly.
• Min. speed • Permanent yellow light when the pump is running at minimum speed,
3,000 min
-1
.
• Max. speed • Permanent yellow light when the pump is running at maximum
speed, 10,700 min
-1
.
• Sensor defective *) • Permanent red light when the sensor signal is out of signal range.
• Overload *) • Permanent red light when the motor load exceeds the stop limit, see
section 7. Technical data.
• Overtemperature *) • Permanent red light when the motor temperature exceeds the stop
limit, see section 7. Technical data.
• Speed reduction *) • Permanent red light when the pump speed is reduced, see section
7. Technical data.
• Voltage alarm *) • Permanent red light when the supply voltage is out of range, see
section 7. Technical data.
• No contact to pump *) • Permanent red light when communication between the CU 301 and
the pump is impossible.
*) Press the on/off button to reset the alarm indication.
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