Specifications

Chapter 8: Troubleshooting
Firmware – S2011 and S3012
Revision: 1 (9/98) 68 © Saftronics, Inc.
Table 20 Fault Diagnosis and Corrective Actions (Continued)
Fault
Display
Description Details Corrective Action
E F 2
External fault at
Terminal S2
E F 3
External fault at
Terminal S3
E F 4
External fault at
Terminal S4
E F 5
External fault at
Terminal S5
E F 6
External fault at
Terminal S6
Fault occurred in the external control circuit.
Check the condition of the input terminal.
If the LED lights when terminal is not
connected, replace the Inverter.
S P I
Excessive ripple
in bus bar
• Inverter input power supply has open-phase.
• Large unbalance in input voltage.
• Check the line voltage.
• Re-tighten the input terminal screws.
S P O
Output open-
phase
Inverter output has open-phase.
• Check the output wiring.
• Check the motor impedance.
• Retighten the output terminal screws.
∗ C E
MEMOBUS
transmission
fault
Control data cannot be received normally.
• Check the transmission devices or signals.
• Verify the setting of the constant. Refer to
8.1 Fault Diagnosis and Corrective Actions
for verification/change of the constant.
Braking
transistor failure
The braking transistor has failed. Replace the Inverter.
H
Braking Resistor
Unit overheat
The Braking Resistor Unit temperature has
exceeded the allowable value. (Protects only
Inverter built-in type.)
Reduce the regenerative load.
C P F O
Control circuit
fault 1
(CPF0)
(Digital Operator
transmission
fault)
• Transmission between the Inverter and Digital
Operator cannot be established 5 seconds after
supplying power.
• MPU peripheral element check fault (initial).
• Insert the Digital Operator connector again.
• Check the control circuit wiring.
• Replace the control card.
C P F 1
Control circuit
fault 2
(CPF1)
(Digital Operator
transmission
fault)
• Transmission between the Inverter and Digital
Operator is established once after supplying
power, but later transmission fault continues for
more than 2 seconds.
• MPU peripheral element check fault (initial).
• Insert the Digital Operator connector again.
• Check the control circuit wiring.
• Replace the control card.
C P F 4
EEPROM fault
(CPF4)
C P F 5
CPU A/D
converter fault
(CPF5)
Inverter control unit fault. Replace the control card.
∗Stopping method selection is available.
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