Yaskawa AC Drive Z1000 - Manual (Page 236)

Cause Possible Solutions
The wrong password was entered.
• If the password entered to A1-04 does not match the password saved to A1-05, then drive
settings cannot be changed.
• Reset the password.
If you cannot remember the password:
•
Scroll to A1-04. Press
OFF
and simultaneously. Parameter A1-05 will appear.
• Set a new password to parameter A1-05.
Undervoltage was detected.
• Check the drive input power voltage by looking at the DC bus voltage (U1-07).
• Check all main circuit wiring.
u Motor Does Not Rotate Properly after Pressing AUTO Button or after Entering External
Run Command
n Motor Does Not Rotate
Cause Possible Solutions
The drive is not in the Drive Mode.
• Check if the DRV light on the HOA keypad is lit.
• Enter the Drive Mode to begin operating the motor.
Refer to The Drive, Programming, and Clock Adjustment
Modes on page 112 .
HAND was pressed.
Stop the drive and check if the correct frequency reference source is selected. If the operator keypad shall be the
source, the LO/RE button LED must be on. If the source is REMOTE, it must be off.
Take the following steps to solve the problem:
•
Press HAND .
Auto-Tuning has just completed.
• When Auto-Tuning completes, the drive is switched back to the Programming Mode. The Run command will
not be accepted unless the drive is in the Drive Mode.
• Use the HOA keypad to enter the Drive Mode. Refer to The Drive, Programming, and Clock Adjustment
Modes on page 112 .
A Fast Stop was executed and has
not yet been reset.
Reset the Fast Stop command.
Settings are incorrect for the source
that provides the Run command.
Check parameter b1-02 (Run Command Selection).
Set b1-02 so that it corresponds with the correct Run command source.
0: HOA keypad
1: Control circuit terminal (default setting)
2: MEMOBUS/Modbus communications
3: Option card
There is faulty wiring in the control
circuit terminals.
• Check the wiring for the control terminal.
• Correct wiring mistakes.
• Check the input terminal status monitor (U1-10).
The drive has been set to accept the
frequency reference from the
incorrect source.
Check parameter b1-01 (Frequency Reference Selection 1).
Set b1-01 to the correct source of the frequency reference.
0: HOA keypad
1: Control circuit terminal (default setting)
2: MEMOBUS/Modbus communications
3: Option card
The terminal set to accept the main
speed reference is set to the incorrect
voltage and/or current.
If the frequency reference is set at terminal A1, check parameter H3-01 for the correct signal level selection. If
terminal A2 is used, check parameter H3-09. Refer to Input Signal Selection for Terminals A1 and A2 on page
100 .
Selection for the sink/source mode
and the internal/external power
supply is incorrect.
Check wire jumper connection between terminals SC and SP. Refer to Sinking/Sourcing Mode Switch for Digital
Inputs on page 100 .
Frequency reference is too low.
• Check the frequency reference monitor (U1-01).
• Increase the frequency by changing the maximum output frequency (E1-09).
Multi-function analog input is set up
to accept gain for the frequency
reference, but no voltage (current)
has been provided.
• Check the multi-function analog input settings.
• Check if analog inputs A1 or A2 are set for frequency reference gain (H3-02, H3-10 = 1). If so, check if the
correct signal is applied to the terminal. The gain and the frequency reference will be 0 if no signal is applied to
the gain input.
• Check if H3-02 and H3-10 have been set to the proper values.
• Check if the analog input value has been set properly. (U1-13 and U1-14)
5.10 Troubleshooting without Fault Display
236 YASKAWA ELECTRIC TOEP C710616 45E YASKAWA AC Drive – Z1000 User Manual