YASKAWA A1000 HHP Programming Manual page 205

Digital Operator Display
Load is too heavy
Acceleration and deceleration times are set
too short.
The load is locked up.
Parameter settings are inappropriate.
Incorrect speed feedback scaling when
using terminal RP as speed feedback input
in V/f Control.
The motor brake engaged.
Digital Operator Display
Cause
Diode module cooling fan has malfunctioned
Digital Operator Display
dnE
Cause
"Drive Enable" is set to a multi-function
contact input (H1-oo = 6A) and that
signal was switched off.
Digital Operator Display
Cause
Sequence error
Digital Operator Display
Cause
Panel fan or panel fan control has
malfunctioned
Digital Operator Display
EF0
Cause
An external fault was received from the
PLC with F6-03 set to 3, which allows the
drive to continue running after an external
fault occurs.
There is a problem with the PLC program. Check the PLC program and correct problems.
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
Reduce the load.
Increase the acceleration and deceleration times (C1-01 through C1-08).
Check the machine.
Check the settings of parameters F1-10 and F1-11
.
• Set H6-02 to value of the speed feedback signal frequency when the motor runs at the maximum speed.
• Adjust the speed feedback signal using parameters H6-03 through H6-05.
• Make sure the speed feedback signal frequency does not exceed the maximum input frequency of terminal
RP.
Ensure the brake releases properly.
Abnormal Diode Module Fan
dFAn
Displays when diode converter module(s) has a fan alarm
• Cycle power to the drive. • Check for fan operation..
• Check for fan operation.
• Verify the cumulative operation time of the fan with monitor U4-03, and verify the cumulative operation
time of the fan maintenance timer with U4-04.
• If the cooling fan has exceeded its expected performance life or is damaged in any other way, replace
the cooling fan.
Drive Disabled
Check the operation sequence.
Forward/Reverse Run Command Input Error
EF
Both forward run and reverse run closed simultaneously for longer than 0.5 s.
Check the forward and reverse command sequence and correct the problem.
Note: When minor fault EF detected, motor ramps to stop.
Abnormal Panel Fan
EFAn
Displays when the Panel Fan Control detects a fan Alarm
• Cycle power to the drive.
• Check for fan operation.
• Verify the cumulative operation time of the fan with monitor U4-03, and verify the cumulative operation
time of the fan maintenance timer with U4-04.
• If the cooling fan has exceeded its expected performance life or is damaged in any other way, replace
the cooling fan.
Option Card External Fault
An external fault condition is present.
• Remove the cause of the external fault.
• Remove the external fault input from the PLC.
Minor Fault Name
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solution
Minor Fault Name
Possible Solutions
2.5 Alarm Detection
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