HOA Keypad Display
Fault Name
STo
Pull-Out Detection
Motor pull out or step out has occurred. Motor has exceeded its pull-out torque.
SvE
Zero Servo Fault
Position deviation during zero servo.
TdE
Time Data Error
TIM
Time Not Set
UL3
Undertorque Detection 1
The current has fallen below the minimum value set for Torque Detection Level 1 (L6-02) for longer than the allowable
time (L6-03).
UL5
Mechanical Weakening Detection 2
The operation conditions matched the conditions set to L6-08.
Uv1
Control Circuit Undervoltage Fault
Voltage in the control circuit fell below the detection level:
• For 200 V class drives: approximately 175 V
• For 400 V class drives: approximately 350 V
Uv2
Control Power Supply Voltage Fault
Voltage is too low for the control drive input power.
Uv3
Undervoltage 3 (Soft-Charge Bypass Relay Fault)
The soft-charge bypass relay failed.
u
Alarm Detection
n
Alarm Codes
An alarm is indicated by a code on the data display and the flashing ALM LED. The drive output is not necessarily switched
off.
To remove an alarm, trace and remove the cause, and reset the drive by pushing the Reset key on the keypad or cycle the
power supply.
Refer to the User Manual for a complete list of causes and possible solutions.
HOA Keypad Display
Alarm Name
AEr
Station Address Setting Error (CC-Link, CANopen, MECHATROLINK)
Option card node address is outside of the acceptable setting range.
AUv
Power Supply Undervoltage
The input power supply voltage became equal to or lower than the Input Power Supply Undervoltage Detection Level
(L2-21).
200 V Class: Approximately 150 Vrms
400 V Class: Approximately 300 Vrms
bb
Baseblock
Drive output interrupted as indicated by an external baseblock signal.
bUS
Option Communication Error
• The connection was lost after establishing initial communication.
• Only detected when the run command frequency reference is assigned to an option card.
CALL
Serial Communication Transmission Error
Communication has not yet been established.
CE
MEMOBUS/Modbus Communication Error
Control data was not received for the CE detection time set to H5-09.
CrST
Cannot Reset
dnE
Drive Disabled
i.6 Troubleshooting
66
YASKAWA ELECTRIC TOEP C710636 11E Z1000U HVAC MATRIX Drive Quick Start Guide