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NCE(D) H, NCE(D) HQ Rev. 5 - Operating Instructions
EN
12. Troubleshooting
If a failure occurs in the pump, the cause of the failure will appear in the display.
The error is identified by two digits, the first digit explains the alarm type, the second digit is reserved for the technical
assistance.
N°
E1x
E10 (dry)
E11
E2x
E22 (hot)
E23
E24
E25
E26
E27
E3x
E31
E4x
E40
E42 (LEd)
E43 (con)
E44
E45
E46
E47
E48
E49
E5x
E51
E52
E53
Displayed alarm
Load errors
Low motor load
High motor load
Protection active
Converter temperature limit
Converter temperature
protection
Converter overcurrent
Overvoltage
Undervoltage
PFC Overcurrent
Pump errors
Software motor protection
active.
Device specific error codes
General frequency converter
error
LED faulty
Communications failed
DC link current offset
Motor temperature outside limits
Circuit temperature outside
limits
Voltage reference outside limits.
15V outside limits
Test SW
Motor error codes
Motor parameters out of range
Thermal protection active
Invalid model selected
Pump is non-responsive
Pump doesn’t work
Causes
Low load detected. Pump is running dry.
Motor might be faulty or viscous medium is present.
Circuit is too hot and power was reduced to less than 2/3 of
rated power.
Circuit is too hot to run, pump stopped
Hardware overcurrent protection triggered.
Line voltage is too high
Line voltage is too low for proper operation.
Power correction circuit current cannot be controlled
Average motor current was too high, pump load is much higher
than expected
Electrical circuitry did not pass self‐test.
One of the display segment diodes is faulty (open/short)
Display board does not detect proper connection to main
board, but power supply is present
Voltage on DC link shunt (R34) not in expected range
During MFG. TEST, this is 10 kΩ, 1% resistor for 10 °C..30 °C
During operation, expected values are ‐55 °C..150 °C
During MFG. TEST, this is 0 °C..50 °C. During operation,
expected values are ‐55 °C..150 °C
Comparison between internal references does not match
15V power supply is not 15V.
Pump has to be reprogramed.
Motor does not behave as expected
Motor temperature is too hot to operate.
Pump model not valid or out of reach.
Turn power on and off.
Check electrical installation and fuse.
IST ND_NCE H HQ ed5_2022_MXS 11_03con gall 20/01/22 11:16 Pagina 13