YASKAWA P1000 Quick Start Manual page 143

Deceleration time is too short and excessive
regenerative energy is flowing back into the
drive
The duty cycle is too high
Excessive braking inertia
The braking operation duty cycle is too high Check the braking operation duty cycle. Braking resistor protection for ERF-type braking resistors
The proper braking resistor has not been
installed
Note: The magnitude of the braking load trips the braking resistor overheat alarm, NOT the surface temperature. Using the braking resistor more
frequently than its rating permits will trip the alarm even when the braking resistor surface is not very hot.
Digital Operator Display
Cause
The braking transistor is damaged
The control circuit is damaged
Digital Operator Display
Digital Operator Display
TdE
Cause
An error has occurred in the Real-Clock Time
function of the digital operator
<1>
<1> Detected in models 4A0930 and 4A1200.
TIE
Cause
An error has occurred in the Real-Clock Time
function of the digital operator
TIM
Cause
The Real-Time Clock for the digital operator
is not set in parameter o4-17
• The drive is a new drive, first power-up
condition
• o4-17 was set to 2, Reset, by the user,
manually clearing the Real-Time Clock
data.
The user did not set the Real Time Clock when
prompted following power-up.
The digital operator battery is low or the
battery has been replaced
An error has occurred in the Real-Time Clock
function of the digital operator
YASKAWA ELECTRIC TOEP YAIP1U 01B YASKAWA AC Drive - P1000 Quick Start Guide
• Check the load, deceleration time, and speed.
• Reduce the load inertia.
• Increase the deceleration times (C1-01 to C1-04).
• Replace the dynamic braking option with a larger device that can handle the power that is discharged.
Check the duty cycle. Maximum of 3% duty cycle is available when L8-01 = 1.
Recalculate braking load and braking power. Reduce the braking load by adjusting braking resistor
settings.
(L8-01 = 1) allows a braking duty cycle of maximum 3%.
• Check the specifications and conditions for the braking resistor device.
• Select the optimal braking resistor.
Dynamic Braking Transistor
rr
The built-in dynamic braking transistor failed.
• Cycle power to the drive and check for reoccurrence of the fault.
• Replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or a Yaskawa representative.
SC IGBT Short Circuit or Ground Fault
Too Many Speed Search Restarts
SEr
The number of Speed Search restarts exceeded the value set to b3-19.
TdE Time Data Error
Replace the digital operator. For instructions on replacing the digital operator, contact Yaskawa or your
nearest sales representative.
Thermistor Disconnect
THo
The thermistor that detects motor temperature has become disconnected.
TIE Time Interval Error
Replace the digital operator. For instructions on replacing the digital operator, contact Yaskawa or your
nearest sales representative.
TIM Time Not Set
Possible Solution
Set o4-17 to 1 to set the time for the digital operator.
The drive will display the "TIM" alarm (Time Not Set) when the Real time Clock is not set . Additionally,
at power up, if the "TIM" condition is present, the drive will automatically switch to the time setting
screen (o4-17 = 1) for 30 seconds to prompt the user to set the Real-Time Clock.
Cycle power to the drive and set the Real Time Clock within 30 seconds of power-up, or set the clock
manually via parameter o4-17.
Replace the digital operator battery and set the Real-Time Clock.
Replace the digital operator. For instructions on replacing the digital operator, contact Yaskawa or your
nearest sales representative.
Fault Name
Possible Solution
Fault Name
Fault Name
Possible Solution
Possible Solution
5.2 Fault Detection
5
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