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Digital Operator
Display
Name
Page
UL3
Undertorque Detection 1
UL4
Undertorque Detection 2
UL5
Mechanical Weakening Detection 2
UnbC
Current Unbalance
Uv1
Undervoltage
Uv2
Control Power Supply Undervoltage
Digital Operator
Display
Name
Page
Uv3
Soft Charge Circuit Fault
Uv4
Gate Drive Board Undervoltage
Uv5
MC/FAN power malfunction
voF
Output Voltage Detection Fault
<1> Displayed as
<2> Displayed as
n
Minor Faults and Alarms
for an overview of possible alarm codes. Conditions such as overvoltages can trip faults and alarms. It is
important to distinguish between faults and alarms to determine the proper corrective actions.
When the drive detects an alarm, the ALM indicator LED blinks and the alarm code display flashes. Most alarms trigger a
digital output programmed for alarm output (H2-
oo
= 10). A fault (not an alarm) is present if the ALM LED lights without
blinking.
for information on fault codes.
Table 2.6 Minor Fault and Alarm Displays
Digital Operator
Display
Name
Minor Fault
Output
(H2-
oo
=
10)
Page
AEr
SI-T Station Number Setting
Error (CC-Link, CANopen,
MECHATROLINK-II)
YES
bb
Drive Baseblock
No output
boL
Braking Transistor Overload
Fault
YES
bUS
Option Card Communications
Error
YES
CALL Serial Communication
Transmission Error
YES
CE
MEMOBUS/Modbus
Communication Error
YES
CrST Cannot Reset
YES
dEv
Excessive Speed Deviation
(for Control Mode with PG)
YES
dFAn Abnormal Diode Module Fan
YES
dnE
Drive Disabled
YES
dWAL DriveWorksEZ Alarm
YES
E5
SI-T3 Watchdog Timer Error
YES
EF
Run Command Input Error
YES
EFAn Abnormal Panel Fan
YES
EF0
Option Card External Fault
YES
to
EF1 to
EF8
External Fault
(input terminal S1 to S8)
YES
FbH
Excessive PID Feedback
YES
FbL
PID Feedback Loss
YES
Hbb
YES
HbbF Safe Disable Signal Input
YES
HCA
Current Alarm
YES
Digital Operator
Display
Name
Minor Fault
Output
(H2-
oo
=
10)
Page
LT-1
Cooling Fan Maintenance Time No output
LT-2
Capacitor Maintenance Time
No output
LT-3
Soft Charge Bypass Relay
Maintenance Time
No output
LT-4
IGBT Maintenance Time (50%) No output
oH
Heatsink Overheat
YES
oH2
Drive Overheat
YES
oH3
Motor Overheat
YES
oH5
Motor Overheat (NTC Input)
YES
oL3
Overtorque 1
YES
oL4
Overtorque 2
YES
oL5
Mechanical Weakening
Detection 1
YES
oS
Overspeed
(for Control Mode with PG)
YES
ov
Overvoltage
YES
PASS MEMOBUS/Modbus Test Mode
Complete
No output
PGo
PG Disconnect
(for Control Mode with PG)
YES
PGoH PG Hardware Fault
(when using PG-X3)
YES
rUn
During Run 2, Motor Switch
Command Input
YES
SE
MEMOBUS/Modbus Test Mode
Fault
YES
2.3 Drive Alarms, Faults, and Errors
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
181
2
Troubleshooting
Summary of Contents for A1000 HHP
Page 359: ......