Fault Display Inverter Causes and
Digital RUN (Green) Statue Explanation
Operator ALARM (Red / Corrective Actions
OH (Cooling linoverheat) • Excessive load
Temperature rise • ImproperVit pattern
because of inverter setting
overloadoperation or ofnsufficient accettime
intake airtemperature
rise. ifthe fault occurs
during acceleration
oH ° fntake air lemperature
exceeding 122'F(50"C)
,5
Checkthe following :
• Loadsize
• VI| pattern setting
(constants n24to n30)
_ntakeairtemperature.
eLl (Motor overload) • Checkthe load size or
Motor ovedoad V/( pattern setting
Protective protection operates by (constants n24to n3O)
o*' _ IOperation built-in electronicthermal • Setthe motor rated
• !Output is overload relay, current shown onthe
_._. !shut OFF nameplate byconstant
, ,and motor n31.
coasts to eL2 (Inverter overload) • Checkthe loadsize or
a stop. Inverter overload V/f pattern setting
o; 2 protection operates by (constants n24to n30)
built-in electronic the*'mel . Check the inverter
overload relay, capacity.
eL3 (Overtorque Check the driven
deteclion) machineand correct the
Motor current exceeded cause ofthe taull, or
o; :_ the preset value in increase the value ot
constant n51 because of constant n51 up to the
machinery fault or highest value allowed for
OVerload. the machine.
EF I EFf, EF2,EF3 Checkthe rnu{ti-furlction
(Externalfault) input terminalsSt, $2
EF2 Lnverterreceives an and$3.
lexternal fau_ inpet from
E F :_ Icontrol circuitterminal,
t
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