72 Rockwell Automation Publication 7000-TG002J-EN-P - March 2015
Chapter 2 Warning Messages
Motor Cap Range 137 The calculated per unit value of the motor filter capacitor
(P128), based on the values entered for motor capacitor kVAR
(P20), motor capacitor voltage (P21), and motor capacitor
frequency (P28) is outside of the normal range of
0.26…0.55 pu.
• Verify the capacitor nameplate data and compare with the
information entered in the drive for the drive rating and motor
rating.
• Contact the factory.
Motor Load Loss 138 The drive has detected a loss of load condition. This is activated
as a warning using the parameter Load Loss Detect (P199), and
the necessary set points are Load Loss Level (P246), Load Loss
Delay (P231), and Load Loss Speed (P259).
• Verify the parameter settings.
• Be sure that the load should not normally be in an unloaded
condition.
Motor OvrLoad 136 A Motor Overload (P550) warning has been detected, where
the overload condition is calculated using Stator Current (P340)
and Motor Overload Warning (P351) as the point where the
overload warning occurs. P351 is programmed as a percentage
of the difference between Motor Overload Min (P350) and
Motor Overload Trip (P179).
• Transient loading - Check the torque limit and overload settings
and compare the loading to the torque and trip settings.
• Verify the drive sizing and that the overload parameters meet the
load requirements.
• Verify HECS feedback and burden resistors.
Motor OvrVoltage 139 The measured motor AC voltage or Stator Voltage (#P344) has
exceeded Motor Overvoltage Trip (P181) for the duration set in
Motor Overvoltage Delay (P182), but this has occurred with the
drive NOT gating (as in a sync transfer event)
Possible Causes:
• Be sure the motor is connected to the drive and there is no open
circuit at the drive output when started in normal mode.
• Self-excitation - Check for flying start/induced motor rotation.
• Check for noise from contactor closure.
Motor Protection 77 Standard external fault/warning input included allowing the
end-user to install a protective relay (in other words, Bulletin
825 motor protection relay) auxiliary contact that can activate a
drive fault or warning, depending on configuration of Motor
Prot Class (P443).
• See the associated fault description.
• Verify the alarm and be sure that there is no damage to the motor.
• Also check the 120V wiring and the XIO card.
X New Master 504 A new Master has been detected. The active Master Drive ID is
displayed in DCSL Master ID (P937).
• This warning is to notify the user that a change of mastership event
had just occurred. The active Master Drive ID is displayed in DCSL
Master ID (P937).
NoEncoderInstlld 150 There is no tach feedback either connected or programmed. • Verify tach requirement for system and change the tach
configuration parameter Tach Type (P233).
No Output Ctctr 196 This warning will happen in Open Circuit test mode and
indicates that there is no output contactor programmed in the
drive. Verify the parameter settings and ensure that the output
of the drive is truly open-circuited.
• If there truly is no output contactor in the system, then you can
mask the fault. Then there will be a no OP Ctctr warning, and you
can continue with the test.
• Be sure that the output of the drive is truly open circuited.
• If there is no output contactor then you MUST disconnect motor
cables from the drive in case running Open Circuit test.
All Drive Types
PF7000A
PF7000B
PF7000C
Marine Drive
Heat pipe Drive
Warning Message Warning
Code
Description Recommended Action(s)
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