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Installation Manual – RPSP
INS-RPSP-EN-05
5.9 Inverter (present on variable speed machines)
This component is a frequency converter for asynchronous three-phase motors that manages the
acceleration and deceleration ramps.
Warning! The machine leaves the factory pre-configured. Do not modify inverter configurations as
doing so may cause risk to persons.
When the device is powered, the power components and some control components are connected
to the power supply line and touching them is extremely dangerous. The cover must remain closed.
In general, power must be disconnected before performing any operations on electrical or
mechanical parts.
After the ALTIVAR inverter has been switched off and the display is completely off, wait 15 minutes
to work on devices safely. These 15 minutes are required to discharge the capacitor
ALTIVAR 12 DIAGNOSTICS AND TROUBLESHOOTING
The messages displayed on the ALTIVAR12 inverter display listed in the table below block the inverter. The
cause of the displayed defect must be eliminated before resetting the inverter. It is possible to reset the
inverter by disconnecting and subsequently repowering.
Table 3 - ALTIVAR 12 (ATV12) Diagnostics
CODE ON
DISPLAY
DESCRIPTION SOLUTION
---- FIRMWARE PROBLEM REPLACEMENT
CFF CONFIGURATION DEFECT 
RERUN INVERTER CONFIGURATION AS DESCRIBED IN THE NEXT
PARAGRAPH
CFI INVALID CONFIGURATION
CrF 1 LOAD CIRCUIT FAULT

SWITCH THE VARIATOR OFF AND BACK ON

CHECK CONNECTIONS

CHECK NETWORK POWER STABILITY

REPLACE THE PREVIOUS POINTS IF INEFFECTIVE
InF 9
CURRENT MEASUREMENT
ERROR

REPLACEMENT
InF b
INTERNAL TEMPERATURE
SENSOR FAULT

REPLACEMENT
InF E CPU ANOMALY

SWITCH THE VARIATOR OFF AND BACK ON

REPLACE THE PREVIOUS POINT IF INEFFECTIVE
ObF OVERBRAKE

CHECK POWER SUPPLY; IT MUST BE 20% BELOW MAXIMUM DURING
OPERATION
OCF OVERCURRENT

EXCESSIVE LOAD

MECHANICAL LOCKING, CHECK MECHANICAL CONDITIONS

CHECK VARIATOR EARTH CONNECTION, MOTOR CABLE AND MOTOR
INSULATION
OHF VARIATOR OVERHEATING

CHECK MOTOR LOAD, VENTILATION AND ROOM TEMPERATURE. WAIT
FOR THE VARIATOR TO COOL DOWN BEFORE STARTING IT BACK UP
OLC OVERLOADING CURRENT

CHECK MECHANICS (WEAR, MECHANICAL LOCKING, OBSTACLES)
OLF MOTOR OVERLOADING

CHECK MOTOR LOAD. WAIT FOR IT TO COOL, REMOVE INVERTER
POWER AND THEN REPOWER.
OPF 1 OUTPUT PHASE 1 LOSS

CHECK CONNECTIONS BETWEEN VARIATOR AND MOTOR

IF USING A CONTACTOR DOWNSTREAM, VERIFY THE ACCURACY OF
THE CONNECTION, THE CABLE AND CONTACTOR
OPF 2 OUTPUT PHASE 3 LOSS
OSF OVERVOLTAGE

VERIFY NETWORK POWER
SCF 1 MOTOR SHORT-CIRCUIT 
CHECK VARIATOR CABLE CONNECTIONS TO THE MOTOR AND MOTOR
INSULATION
SCF 3 SHORT-CIRCUIT TO EARTH
SCF 4 IGBT SHORT

REPLACEMENT
SCF 5 LOAD SHORT-CIRCUIT

CHECK CABLES CONNECTING THE VARIATOR TO THE MOTOR AND
MOTOR INSULATION
t ┘ F IGBT HEATING

WAIT FOR IT TO COOL BEFORE STARTING UP AGAIN
USF UNDERVOLTAGE 
CHECK POWER