IMPPUMPS NMT MAX Series - Page 39

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Error code Description Probable cause
E1x Loaderrors 
E10(drY) Lowmotorload Lowloaddetected.Pumpisrunningdry.
E11 Highmotorload
Motormightbefaultyorviscousmediumis
present.
E2x Protection active 
E22(hot) Convertertemperaturelimit
Circuitistoohotandpowerwasreducedto
lessthan2/3ofratedpower.
E23 Convertertemperatureprotection Circuitistoohottorun,pumpstopped
E24 Converterovercurrent Hardwareovercurrentprotectiontriggered.
E25 Overvoltage Linevoltageistoohigh
E26 Undervoltage Linevoltageistoolowforproperoperation.
E27 PFCOvercurrent
Power correction circuit current cannot be
controlled
E3x Pumperrors 
E31 Softwaremotorprotectionactive.
Averagemotorcurrentwastoohigh,pump
loadismuchhigherthanexpected
E4x Devicespecificerrorcodes 
E40 Generalfrequencyconvertererror Electricalcircuitrydidnotpassself‐test.
E42(LEd) LEDfaulty
Oneofthedisplaysegmentdiodesisfaulty
(open/short)
E43(con) Communicationsfailed
Displayboarddoesnotdetectproper
connectiontomainboard,butpowersupplyis
present
E44 DClinkcurrentoffset
VoltageonDClinkshunt(R34)notinexpected
range
E45 Motortemperatureoutsidelimits
DuringMFG.TEST,thisis10kΩ,1%resistorfor
10°C..30°CDuringoperation,expectedvalues
are‐55°C..150°C
E46 Circuittemperatureoutsidelimits
During MFG. TEST, this is 0 °C..50 °C. During
operation,expectedvaluesare‐55°C..150°C
E47 Voltagereferenceoutsidelimits.
Comparison between internal references does
notmatch
E48 15Voutsidelimits 15Vnapajanjeni15V.
E49 Testloaddoesnotmatch
Notestloaddetectedorcurrentmeasurement
doesnotworkproperly(MFG.TEST)
E5x Motorerrorcodes 
E51 Motorparametersoutofrange Motordoesnotbehaveasexpected
E52 Thermalprotectionactive Motortemperatureistoohottooperate.
E53 Invalidmodelselected Pumpmodelnotvalidoroutofreach