Rockwell Automation Publication 7000-TG002J-EN-P - March 2015 31
Fault Messages Chapter 1
X Line OvrCurrent 112 The measured line current (P122) has exceeded line
overcurrent trip value (P161) for the duration set in the line
overcurrent delay parameter (P162).
• CHECK FOR SHORTED SCRs – DO NOT ATTEMPT TO RESET THIS FAULT UNTIL YOU HAVE
VERIFIED THE SCRS ARE NOT SHORTED.
• Investigate possible damage to the input isolation transformer if there have been several
aborted starts with line overcurrent faults.
• Verify that the drive sizing is not too small for the rated motor current.
• Verify that the parameters are set properly.
• Verify the burden resistors are not opened and there are no loose grounds.
X Line OvrVoltage 116 The calculated Line Voltage has exceeded Line Overvoltage
Trip value (P165) for the duration set in Line Overvoltage
Delay parameter (P166). This is calculated by looking at the
compensated individual bridge voltages Master, Slave1 and
Slave2 line volt (P136-138), and comparing them to 1/3 of
the line overvoltage trip value.
• Verify the parameters are set properly.
• Verify VSB connections and tap settings, resistor values, and grounds.
• Verify that the parameter Input Impedance (P140) was tuned properly.
• If voltage is too high, change tap settings on the input source to lower voltage to an
acceptable level.
• Verify if drive is being fed from generators. Review the reactive power capability of the
generators. Contact the factory for details.
X Login Declined 604 The Master drive has refused the Follower drive’s attempt to
login (connect) to the DCSL network.
• Confirm that the firmware major revision level on the Master drive and Follower drive are
the same.
• Confirm that the Number of Nodes (P936) and load factor parameters of the Follower drive
match the Master drive settings.
X Low Capacity Flt 605 The number of drives in the DCSL Master-Follower drive
system has dropped below the specified minimum capacity
the system can run.
• Check the minimum capacity set for Number of Nodes (P936) and DCSL Config (P955), bits
3 (Ld Factor 0) and 4 (Ld Factor 1). The minimum number of drives required =
Number of Nodes - Maximum reduced margin.
X LR Double Fans 472 The drive has just lost two or more of the cooling fans. • Verify the fan contactors, fan overload and the 120V wiring to the XIO card.
X LR Fan1 Ctctr 481 A cooling fan loss has been detected. • Verify the fan contactor, fan overload and the 120V wiring to the XIO card.
X Main VSB 459 This fault indicates that the voltage sensing board associated
with the motor and line voltages is not plugged in
• Check connector J27 at ACB.
• Verify connection from VSB to ACB.
X Master Comm Flt 600 Follower drive has detected the loss of communications with
the Master drive.
• Check the communication wiring and shielding.
X Master CurUnbal 123 The measured and calculated phase currents in the master
bridge have exceeded the value set in Line CurUnbalTrp
(P108) for the duration set in Line CurUnbalDly (P109). The
unbalance value can be seen in parameter 613.
• Verify that all current transformer connections are connected properly and that no wires
are reversed – ring-out wires to verify connections.
• Check grounding on CTs.
• Ensure that all plugs are firmly connected in the ACB.
• Check that all input voltages are balanced.
• Verify parameter settings.
• Check the burden resistors.
• Verify the input capacitor values if installed.
• Verity that there are no open sharing resistors.
• Verify all line thyristors are firing in Gating Test mode.
• Check the input filter capacitor (for PWM rectifier drives).
All Drive Types
PF7000A
PF7000B
PF7000C
Marine Drive
Heat pipe Drive
Fault Message Fault Code Description Recommended Action(s)
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